1 Changes in version 0.4.7.5-alpha - 2022-03-25
2 This version contains, of what we hope, the final work for congestion
3 control paving the way to the stable version. We expect this to be the last
4 alpha version of the 0.4.7.x series. Mostly minor bugfixes except one major
5 bugfix that changes how Tor behaves with DNS timeouts for Exit relays. As
6 always with an alpha, we recommend all relay operators to upgrade from
7 previous alpha to this one.
9 o Major bugfixes (onion service, congestion control):
10 - Fix the onion service upload case where the congestion control
11 parameters were not added to the right object. Fixes bug 40586;
12 bugfix on 0.4.7.4-alpha.
14 o Major bugfixes (relay, DNS):
15 - Lower the DNS timeout from 3 attempts at 5 seconds each to 2
16 attempts at 1 seconds each. Two new consensus parameters were
17 added to control these values. This change should improve observed
18 performance under DNS load; see ticket for more details. Fixes bug
19 40312; bugfix on 0.3.5.1-alpha.
21 o Minor features (control port):
22 - Provide congestion control fields on CIRC_BW and STREAM control
23 port events, for use by sbws. Closes ticket 40568.
25 o Minor features (fallbackdir):
26 - Regenerate fallback directories generated on March 25, 2022.
28 o Minor features (geoip data):
29 - Update the geoip files to match the IPFire Location Database, as
30 retrieved on 2022/03/25.
32 o Minor bugfixes (DNSPort, dormant mode):
33 - A request on the DNSPort now wakes up a dormant tor. Fixes bug
34 40577; bugfix on 0.3.5.1-alpha.
36 o Minor bugfixes (metrics port, onion service):
37 - Fix the metrics with a port label to be unique. Before this, all
38 ports of an onion service would be on the same line which violates
39 the Prometheus rules of unique labels. Fixes bug 40581; bugfix
42 o Minor bugfixes (onion service congestion control):
43 - Avoid a non-fatal assertion failure in the case where we fail to
44 set up congestion control on a rendezvous circuit. This could
45 happen naturally if a cache entry expired at an unexpected time.
46 Fixes bug 40576; bugfix on 0.4.7.4-alpha.
48 o Minor bugfixes (onion service, client):
49 - Fix a rare but fatal assertion failure due to a guard subsystem
50 recursion triggered by the onion service client. Fixes bug 40579;
51 bugfix on 0.3.5.1-alpha.
53 o Minor bugfixes (relay, overload):
54 - Decide whether to signal overload based on a fraction and
55 assessment period of ntor handshake drops. Previously, a single
56 drop could trigger an overload state, which caused many false
57 positives. Fixes bug 40560; bugfix on 0.4.7.1-alpha.
60 Changes in version 0.4.7.4-alpha - 2022-02-25
61 This version contains the negotiation congestion control work which is the
62 final part needed before going stable. There are also various bugfixes
63 including two major ones detailed below. Last, the Exit notice page layout
64 has been modernized but the text is unchanged. We recommend that all relay
65 operators running any previous alpha upgrade to this one.
67 o Major features (relay, client, onion services):
68 - Implement RTT-based congestion control for exits and onion
69 services, from Proposal 324. Disabled by default. Enabled by the
70 'cc_alg' consensus parameter. Closes ticket 40444.
72 o Major bugfixes (client):
73 - Stop caching TCP connect failures to relays/bridges when we
74 initiated the connection as a client. Now we only cache connect
75 failures as a relay or bridge when we initiated them because of an
76 EXTEND request. Declining to re-attempt the client-based
77 connections could cause problems when we lose connectivity and try
78 to reconnect. Fixes bug 40499; bugfix on 0.3.3.4-alpha.
80 o Major bugfixes (relay, overload):
81 - Do not trigger a general overload on DNS timeout. Even after
82 fixing 40527, some code remained that triggered the overload.
83 Fixes bug 40564; bugfix on 0.4.7.1-alpha.
85 o Minor feature (authority, relay):
86 - Reject End-Of-Life relays running version 0.3.5.x. Closes
89 o Minor features (fallbackdir):
90 - Regenerate fallback directories generated on February 25, 2022.
92 o Minor features (geoip data):
93 - Update the geoip files to match the IPFire Location Database, as
94 retrieved on 2022/02/25.
96 o Minor bugfix (logging):
97 - Update a log notice dead URL to a working one. Fixes bug 40544;
98 bugfix on 0.3.5.1-alpha.
100 o Minor bugfix (relay):
101 - Remove the HSDir and HSIntro onion service v2 protocol versions so
102 relay stop advertising that they support them. Fixes bug 40509;
105 o Minor bugfixes (cell scheduling):
106 - Avoid writing empty payload with NSS write.
107 - Don't attempt to write 0 bytes after a cell scheduling loop. No
108 empty payload was put on the wire. Fixes bug 40548; bugfix
111 o Minor bugfixes (compilation):
112 - Resume being able to build on old / esoteric gcc versions. Fixes
113 bug 40550; bugfix on 0.4.7.1-alpha.
115 o Minor bugfixes (compiler warnings):
116 - Fix couple compiler warnings on latest Ubuntu Jammy. Fixes bug
117 40516; bugfix on 0.3.5.1-alpha.
120 - Provide an improved version of the tor-exit-notice.html file for
121 exit relays to use as a landing page. The text is unchanged, but
122 the page design and layout are significantly modernized, and
123 several links are fixed. Patch from "n_user"; closes ticket 40529.
126 Changes in version 0.4.6.10 - 2022-02-04
127 This version contains minor bugfixes but one in particular is that relays
128 don't advertise onion service v2 support at the protocol version level.
130 o Minor features (fallbackdir):
131 - Regenerate fallback directories generated on February 04, 2022.
133 o Minor features (geoip data):
134 - Update the geoip files to match the IPFire Location Database, as
135 retrieved on 2022/02/04.
137 o Minor bugfix (logging):
138 - Update a log notice dead URL to a working one. Fixes bug 40544;
139 bugfix on 0.3.5.1-alpha.
141 o Minor bugfix (relay):
142 - Remove the HSDir and HSIntro onion service v2 protocol versions so
143 relay stop advertising that they support them. Fixes bug 40509;
146 o Minor bugfixes (MetricsPort, Prometheus):
147 - Add double quotes to the label values of the onion service
148 metrics. Fixes bug 40552; bugfix on 0.4.5.1-alpha.
151 Changes in version 0.4.5.12 - 2022-02-04
152 This version contains mostly minor bugfixes for which you can find the
153 details below. The previous release (0.4.5.11) was suppose to update the
154 GeoIP and fallbackdir lists but a problem in our release pipeline prevented
155 those files to be updated correctly. Thus, this release regenerates up to
156 date lists. Furthermore, another fix to highlight is that relays don't
157 advertise onion service v2 support at the protocol version level.
159 o Minor feature (reproducible build):
160 - The repository can now build reproducible tarballs which adds the
161 build command "make dist-reprod" for that purpose. Closes
164 o Minor features (compilation):
165 - Give an error message if trying to build with a version of
166 LibreSSL known not to work with Tor. (There's an incompatibility
167 with LibreSSL versions 3.2.1 through 3.4.0 inclusive because of
168 their incompatibility with OpenSSL 1.1.1's TLSv1.3 APIs.) Closes
171 o Minor features (fallbackdir):
172 - Regenerate fallback directories generated on February 04, 2022.
174 o Minor features (geoip data):
175 - Update the geoip files to match the IPFire Location Database, as
176 retrieved on 2022/02/04.
178 o Minor bugfix (logging):
179 - Update a log notice dead URL to a working one. Fixes bug 40544;
180 bugfix on 0.3.5.1-alpha.
182 o Minor bugfix (relay):
183 - Remove the HSDir and HSIntro onion service v2 protocol versions so
184 relay stop advertising that they support them. Fixes bug 40509;
187 o Minor bugfixes (compilation):
188 - Fix a compilation error when trying to build Tor with a compiler
189 that does not support expanding statically initialized const
190 values in macro's. Fixes bug 40410; bugfix on 0.4.5.1-alpha
191 - Fix our configuration logic to detect whether we had OpenSSL 3:
192 previously, our logic was reversed. This has no other effect than
193 to change whether we suppress deprecated API warnings. Fixes bug
194 40429; bugfix on 0.3.5.13.
196 o Minor bugfixes (MetricsPort, Prometheus):
197 - Add double quotes to the label values of the onion service
198 metrics. Fixes bug 40552; bugfix on 0.4.5.1-alpha.
200 o Minor bugfixes (relay):
201 - Reject IPv6-only DirPorts. Our reachability self-test forces
202 DirPorts to be IPv4, but our configuration parser allowed them to
203 be IPv6-only, which led to an assertion failure. Fixes bug 40494;
204 bugfix on 0.4.5.1-alpha.
207 Changes in version 0.4.7.3-alpha - 2021-12-15
208 This third alpha release of the 0.4.7.x series fixes several bugs including
209 two major ones affecting Bridges and Relays (see below). If you are running
210 an earlier 0.4.7.x version, you should upgrade to this version.
212 o Major bugfixes (bridges):
213 - Make Tor work reliably again when you have multiple bridges
214 configured and one or more of them are unreachable. The problem
215 came because we require that we have bridge descriptors for both
216 of our first two bridges (else we refuse to try to connect), but
217 in some cases we would wait three hours before trying to fetch
218 these missing descriptors, and/or never recover when we do try to
219 fetch them. Fixes bugs 40396 and 40495; bugfix on 0.3.0.5-rc
222 o Major bugfixes (relay, overload):
223 - Change the MetricsPort DNS "timeout" label to be "tor_timeout" in
224 order to indicate that this was a DNS timeout from tor perspective
225 and not the DNS server itself.
226 - Deprecate overload_dns_timeout_period_secs and
227 overload_dns_timeout_scale_percent consensus parameters as well.
228 They were used to assess the overload state which is no more now.
229 - Don't make Tor DNS timeout trigger an overload general state.
230 These timeouts are different from DNS server timeout. They have to
231 be seen as timeout related to UX and not because of a network
232 problem. Fixes bug 40527; bugfix on 0.4.6.1-alpha.
234 o Minor feature (reproducible build):
235 - The repository can now build reproducible tarballs which adds the
236 build command "make dist-reprod" for that purpose. Closes
239 o Minor features (compilation):
240 - Give an error message if trying to build with a version of
241 LibreSSL known not to work with Tor. (There's an incompatibility
242 with LibreSSL versions 3.2.1 through 3.4.0 inclusive because of
243 their incompatibility with OpenSSL 1.1.1's TLSv1.3 APIs.) Closes
246 o Minor features (fallbackdir):
247 - Regenerate fallback directories generated on December 15, 2021.
249 o Minor features (geoip data):
250 - Update the geoip files to match the IPFire Location Database, as
251 retrieved on 2021/12/15.
253 o Minor features (portability):
254 - Try to prevent a compiler warning about printf arguments that
255 could sometimes occur on MSYS2 depending on the configuration.
258 o Minor bugfix (pluggable transport):
259 - Do not kill a managed proxy if one of its transport configurations
260 emits a method error. Instead log a warning and continue processing
261 method arguments. Fixes bug 7362; bugfix on 0.2.3.6-alpha.
263 o Minor bugfixes (bridges):
264 - When we don't yet have a descriptor for one of our bridges,
265 disable the entry guard retry schedule on that bridge. The entry
266 guard retry schedule and the bridge descriptor retry schedule can
267 conflict, e.g. where we mark a bridge as "maybe up" yet we don't
268 try to fetch its descriptor yet, leading Tor to wait (refusing to
269 do anything) until it becomes time to fetch the descriptor. Fixes
270 bug 40497; bugfix on 0.3.0.3-alpha.
272 o Minor bugfixes (compilation):
273 - Fix our configuration logic to detect whether we had OpenSSL 3:
274 previously, our logic was reversed. This has no other effect than
275 to change whether we suppress deprecated API warnings. Fixes bug
276 40429; bugfix on 0.3.5.13.
278 o Minor bugfixes (controller, path bias):
279 - When a circuit's path is specified, in full or in part, from the
280 controller API, do not count that circuit towards our path-bias
281 calculations. (Doing so was incorrect, since we cannot tell
282 whether the controller is selecting relays randomly.) Resolves a
283 "Bug" warning. Fixes bug 40515; bugfix on 0.2.4.10-alpha.
285 o Minor bugfixes (logging):
286 - When we no longer have enough directory information to use the
287 network, we would log a notice-level message -- but we would not
288 reliably log a message when we recovered and resumed using the
289 network. Now make sure there is always a corresponding message
290 about recovering. Fixes bug 40496; bugfix on 0.3.5.1-alpha.
292 o Minor bugfixes (performance, DoS):
293 - Fix one case of a not-especially viable denial-of-service attack
294 found by OSS-Fuzz in our consensus-diff parsing code. This attack
295 causes a lot small of memory allocations and then immediately
296 frees them: this is only slow when running with all the sanitizers
297 enabled. Fixes one case of bug 40472; bugfix on 0.3.1.1-alpha.
299 o Minor bugfixes (relay):
300 - Reject IPv6-only DirPorts. Our reachability self-test forces
301 DirPorts to be IPv4, but our configuration parser allowed them to
302 be IPv6-only, which led to an assertion failure. Fixes bug 40494;
303 bugfix on 0.4.5.1-alpha.
305 o Minor bugfixes (sandbox):
306 - Fix the sandbox on i386 by modifying it to allow the
307 "clock_gettime64" and "statx" system calls and to filter the
308 "chown32" and "stat64" system calls in place of "chown" and
309 "stat", respectively. Fixes bug 40505; bugfix on 0.2.5.4-alpha.
311 o Documentation (man, relay):
312 - Missing "OverloadStatistics" in tor.1 manpage. Fixes bug 40504;
313 bugfix on 0.4.6.1-alpha.
316 Changes in version 0.4.6.9 - 2021-12-15
317 This version fixes several bugs from earlier versions of Tor. One important
318 piece is the removal of DNS timeout metric from the overload general signal.
319 See below for more details.
321 o Major bugfixes (relay, overload):
322 - Don't make Tor DNS timeout trigger an overload general state.
323 These timeouts are different from DNS server timeout. They have to
324 be seen as timeout related to UX and not because of a network
325 problem. Fixes bug 40527; bugfix on 0.4.6.1-alpha.
327 o Minor feature (reproducible build):
328 - The repository can now build reproducible tarballs which adds the
329 build command "make dist-reprod" for that purpose. Closes
332 o Minor features (compilation):
333 - Give an error message if trying to build with a version of
334 LibreSSL known not to work with Tor. (There's an incompatibility
335 with LibreSSL versions 3.2.1 through 3.4.0 inclusive because of
336 their incompatibility with OpenSSL 1.1.1's TLSv1.3 APIs.) Closes
339 o Minor features (fallbackdir):
340 - Regenerate fallback directories generated on December 15, 2021.
342 o Minor features (geoip data):
343 - Update the geoip files to match the IPFire Location Database, as
344 retrieved on 2021/12/15.
346 o Minor bugfixes (compilation):
347 - Fix our configuration logic to detect whether we had OpenSSL 3:
348 previously, our logic was reversed. This has no other effect than
349 to change whether we suppress deprecated API warnings. Fixes bug
350 40429; bugfix on 0.3.5.13.
352 o Minor bugfixes (relay):
353 - Reject IPv6-only DirPorts. Our reachability self-test forces
354 DirPorts to be IPv4, but our configuration parser allowed them to
355 be IPv6-only, which led to an assertion failure. Fixes bug 40494;
356 bugfix on 0.4.5.1-alpha.
358 o Documentation (man, relay):
359 - Missing "OverloadStatistics" in tor.1 manpage. Fixes bug 40504;
360 bugfix on 0.4.6.1-alpha.
363 Changes in version 0.4.7.2-alpha - 2021-10-26
364 This second alpha release of the 0.4.7.x series adds two major
365 features: congestion control (prop324) for network performance, and
366 the MiddleOnly flag (prop335) voted by the authorities to pin relays
367 to the middle position for various network health reasons. This
368 release also fixes numerous bugs.
370 The congestion control feature, detailed in proposal 324, still needs
371 more work before we can enable it by default. It is currently in its
372 testing and tuning phase which means that you should expect more
373 0.4.7.x alphas as congestion control gets stabilized and tuned for
374 optimal performance. And so, at this release, it can not be used
375 without a custom patch.
377 o Major features (congestion control):
378 - Implement support for flow control over congestion controlled
379 circuits. This work comes from proposal 324. Closes ticket 40450.
381 o Major features (directory authority):
382 - Add a new consensus method to handle MiddleOnly specially. When
383 enough authorities are using this method, then any relay tagged
384 with the MiddleOnly flag will have its Exit, Guard, HSDir, and
385 V2Dir flags automatically cleared, and will have its BadExit flag
386 automatically set. Implements part of proposal 335.
387 - Authorities can now be configured to label relays as "MiddleOnly".
388 When voting for this flag, authorities automatically vote against
389 Exit, Guard, HSDir, and V2Dir; and in favor of BadExit. Implements
390 part of proposal 335. Based on a patch from Neel Chauhan.
392 o Major bugfix (relay, metrics):
393 - On the MetricsPort, the DNS error statistics are not reported by
394 record type ("record=...") anymore due to a libevent bug
395 (https://github.com/libevent/libevent/issues/1219). Fixes bug
396 40490; bugfix on 0.4.7.1-alpha.
398 o Major bugfixes (relay, overload state):
399 - Relays report the general overload state for DNS timeout errors
400 only if X% of all DNS queries over Y seconds are errors. Before
401 that, it only took 1 timeout to report the overload state which
402 was just too low of a threshold. The X and Y values are 1% and 10
403 minutes respectively but they are also controlled by consensus
404 parameters. Fixes bug 40491; bugfix on 0.4.6.1-alpha.
406 o Minor feature (authority, relay):
407 - Reject End-Of-Life relays running version 0.4.2.x, 0.4.3.x,
408 0.4.4.x and 0.4.5 alphas/rc. Closes ticket 40480.
410 o Minor feature (onion service v2):
411 - Onion service v2 addresses are now not recognized anymore by tor
412 meaning a bad hostname is returned when attempting to pass it on a
413 SOCKS connection. No more deprecation log is emitted client side.
415 - See https://blog.torproject.org/v2-deprecation-timeline for
416 details on how to transition from v2 to v3.
418 o Minor features (fallbackdir):
419 - Regenerate fallback directories for October 2021. Closes
422 o Minor features (logging, heartbeat):
423 - When a relay receives a cell that isn't encrypted properly for it,
424 but the relay is the last hop on the circuit, the relay now counts
425 how many cells of this kind it receives, on how many circuits, and
426 reports this information in the log. Previously, we'd log each
427 cell at PROTOCOL_WARN level, which is far too verbose to be
428 useful. Fixes part of ticket 40400.
430 o Minor features (testing):
431 - We now have separate fuzzers for the inner layers of v3 onion
432 service descriptors, to prevent future bugs like 40392. Closes
435 o Minor bugfixes (compilation):
436 - Fix compilation error when __NR_time is not defined. Fixes bug
437 40465; bugfix on 0.2.5.5-alpha. Patch by Daniel Pinto.
439 o Minor bugfixes (dirauth, bandwidth scanner):
440 - Add the AuthDirDontVoteOnDirAuthBandwidth dirauth config parameter
441 to avoid voting on bandwidth scanner weights to v3 directory
442 authorities. Fixes bug 40471; bugfix on 0.2.2.1-alpha. Patch by
445 o Minor bugfixes (fragile-hardening, sandbox):
446 - When building with --enable-fragile-hardening, add or relax Linux
447 seccomp rules to allow AddressSanitizer to execute normally if the
448 process terminates with the sandbox active. This has the side
449 effect of disabling the filtering of file- and directory-open
450 requests on most systems and dilutes the effectiveness of the
451 sandbox overall, as a wider range of system calls must be
452 permitted. Fixes bug 11477; bugfix on 0.2.5.4-alpha.
454 o Minor bugfixes (logging):
455 - If a channel has never received or transmitted a cell, or seen a
456 client, do not calculate time diffs against 1/1/1970 but log a
457 better prettier message. Fixes bug 40182; bugfix on 0.2.4.4.
459 o Minor bugfixes (onion service):
460 - Fix a warning BUG that would occur often on heavily loaded onion
461 service leading to filling the logs with useless warnings. Fixes
462 bug 34083; bugfix on 0.3.2.1-alpha.
464 o Minor bugfix (CI, onion service):
465 - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
466 bugfix on 0.3.2.1-alpha.
468 o Minor bugfixes (onion service, config):
469 - Fix a memory leak for a small config line string that could occur
470 if the onion service failed to be configured from file properly.
471 Fixes bug 40484; bugfix on 0.3.2.1-alpha.
473 o Minor bugfixes (onion service, TROVE-2021-008):
474 - Only log v2 access attempts once total, in order to not pollute
475 the logs with warnings and to avoid recording the times on disk
476 when v2 access was attempted. Note that the onion address was
477 _never_ logged. This counts as a Low-severity security issue.
478 Fixes bug 40474; bugfix on 0.4.5.8.
479 - Note that due to #40476 which removes v2 support entirely, this
480 log line is not emitted anymore. We still mention this in the
481 changelog because it is a Low-severity TROVE.
483 o Minor bugfixes (usability):
484 - Do not log "RENDEZVOUS1 cell with unrecognized rendezvous cookie"
485 at LOG_PROTOCOL_WARN; instead log it at DEBUG. This warning can
486 happen naturally if a client gives up on a rendezvous circuit
487 after sending INTRODUCE1. Fixes part of bug 40400; bugfix
489 - Do not log "circuit_receive_relay_cell failed" at
490 LOG_PROTOCOL_WARN; instead log it at DEBUG. In every case where we
491 would want to log this as a protocol warning, we are already
492 logging another warning from inside circuit_receive_relay_cell.
493 Fixes part of bug 40400; bugfix on 0.1.1.9-alpha.
495 o Code simplification and refactoring:
496 - Lower the official maximum for "guard-extreme-restriction-percent"
497 to 100. This has no effect on when the guard code will generate a
498 warning, but it makes the intent of the option clearer. Fixes bug
499 40486; bugfix on 0.3.0.1-alpha.
502 - Add unit tests for the Linux seccomp sandbox. Resolves
505 o Code simplification and refactoring (rust):
506 - Remove Rust support and its associated code. It is unsupported and
507 Rust focus should be shifted to arti. Closes ticket 40469.
509 o Testing (CI, chutney):
510 - Bump the data size that chutney transmits to 5MBytes in order to
511 trigger the flow control and congestion window code. Closes
515 Changes in version 0.4.6.8 - 2021-10-26
516 This version fixes several bugs from earlier versions of Tor. One
517 highlight is a fix on how we track DNS timeouts to report general
520 o Major bugfixes (relay, overload state):
521 - Relays report the general overload state for DNS timeout errors
522 only if X% of all DNS queries over Y seconds are errors. Before
523 that, it only took 1 timeout to report the overload state which
524 was just too low of a threshold. The X and Y values are 1% and 10
525 minutes respectively but they are also controlled by consensus
526 parameters. Fixes bug 40491; bugfix on 0.4.6.1-alpha.
528 o Minor features (fallbackdir):
529 - Regenerate fallback directories for October 2021. Closes
532 o Minor features (testing):
533 - On a testing network, relays can now use the
534 TestingMinTimeToReportBandwidth option to change the smallest
535 amount of time over which they're willing to report their observed
536 maximum bandwidth. Previously, this was fixed at 1 day. For
537 safety, values under 2 hours are only supported on testing
538 networks. Part of a fix for ticket 40337.
539 - Relays on testing networks no longer rate-limit how frequently
540 they are willing to report new bandwidth measurements. Part of a
541 fix for ticket 40337.
542 - Relays on testing networks now report their observed bandwidths
543 immediately from startup. Previously, they waited until they had
544 been running for a full day. Closes ticket 40337.
546 o Minor bugfix (onion service):
547 - Do not flag an HSDir as non-running in case the descriptor upload
548 or fetch fails. An onion service closes pending directory
549 connections before uploading a new descriptor which can thus lead
550 to wrongly flagging many relays and thus affecting circuit building
551 path selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
552 - Improve logging when a bad HS version is given. Fixes bug 40476;
553 bugfix on 0.4.6.1-alpha.
555 o Minor bugfix (CI, onion service):
556 - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
557 bugfix on 0.3.2.1-alpha.
559 o Minor bugfixes (compatibility):
560 - Fix compatibility with the most recent Libevent versions, which no
561 longer have an evdns_set_random_bytes() function. Because this
562 function has been a no-op since Libevent 2.0.4-alpha, it is safe
563 for us to just stop calling it. Fixes bug 40371; bugfix
566 o Minor bugfixes (onion service, TROVE-2021-008):
567 - Only log v2 access attempts once total, in order to not pollute
568 the logs with warnings and to avoid recording the times on disk
569 when v2 access was attempted. Note that the onion address was
570 _never_ logged. This counts as a Low-severity security issue.
571 Fixes bug 40474; bugfix on 0.4.5.8.
574 Changes in version 0.4.5.11 - 2021-10-26
575 The major change in this version is that v2 onion services are now
576 disabled at the client, service, and relay: any Tor nodes running this
577 version and onward will stop supporting v2 onion services. This is the
578 last step in the long deprecation process of v2 onion services.
579 Everyone running an earlier version, whether as a client, a relay, or
580 an onion service, should upgrade to Tor 0.3.5.17, 0.4.5.11,
583 o Major feature (onion service v2):
584 - See https://blog.torproject.org/v2-deprecation-timeline for
585 details on how to transition from v2 to v3.
586 - The control port commands HSFETCH and HSPOST no longer allow
587 version 2, and it is no longer possible to create a v2 service
589 - Tor no longer allows creating v2 services, or connecting as a
590 client to a v2 service. Relays will decline to be a v2 HSDir or
591 introduction point. This effectively disables onion service
592 version 2 Tor-wide. Closes ticket 40476.
594 o Minor features (bridge, backport from 0.4.6.8):
595 - We now announce the URL to Tor's new bridge status at
596 https://bridges.torproject.org/ when Tor is configured to run as a
597 bridge relay. Closes ticket 30477.
599 o Minor features (fallbackdir):
600 - Regenerate fallback directories for October 2021. Closes
603 o Minor features (logging, diagnostic, backport from 0.4.6.5):
604 - Log decompression failures at a higher severity level, since they
605 can help provide missing context for other warning messages. We
606 rate-limit these messages, to avoid flooding the logs if they
607 begin to occur frequently. Closes ticket 40175.
609 o Minor features (testing, backport from 0.4.6.8):
610 - On a testing network, relays can now use the
611 TestingMinTimeToReportBandwidth option to change the smallest
612 amount of time over which they're willing to report their observed
613 maximum bandwidth. Previously, this was fixed at 1 day. For
614 safety, values under 2 hours are only supported on testing
615 networks. Part of a fix for ticket 40337.
616 - Relays on testing networks no longer rate-limit how frequently
617 they are willing to report new bandwidth measurements. Part of a
618 fix for ticket 40337.
619 - Relays on testing networks now report their observed bandwidths
620 immediately from startup. Previously, they waited until they had
621 been running for a full day. Closes ticket 40337.
623 o Minor bugfix (CI, onion service):
624 - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
625 bugfix on 0.3.2.1-alpha.
627 o Minor bugfix (onion service, backport from 0.4.6.8):
628 - Do not flag an HSDir as non-running in case the descriptor upload
629 or fetch fails. An onion service closes pending directory
630 connections before uploading a new descriptor which can thus lead
631 to wrongly flagging many relays and thus affecting circuit building
632 path selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
634 o Minor bugfixes (compatibility, backport from 0.4.6.8):
635 - Fix compatibility with the most recent Libevent versions, which no
636 longer have an evdns_set_random_bytes() function. Because this
637 function has been a no-op since Libevent 2.0.4-alpha, it is safe
638 for us to just stop calling it. Fixes bug 40371; bugfix
641 o Minor bugfixes (consensus handling, backport from 0.4.6.4-rc):
642 - Avoid a set of bugs that could be caused by inconsistently
643 preferring an out-of-date consensus stored in a stale directory
644 cache over a more recent one stored on disk as the latest
645 consensus. Fixes bug 40375; bugfix on 0.3.1.1-alpha.
647 o Minor bugfixes (onion service, TROVE-2021-008, backport from 0.4.6.8):
648 - Only log v2 access attempts once total, in order to not pollute
649 the logs with warnings and to avoid recording the times on disk
650 when v2 access was attempted. Note that the onion address was
651 _never_ logged. This counts as a Low-severity security issue.
652 Fixes bug 40474; bugfix on 0.4.5.8.
655 Changes in version 0.3.5.17 - 2021-10-26
656 The major change in this version is that v2 onion services are now
657 disabled at the client, service, and relay: any Tor nodes running this
658 version and onward will stop supporting v2 onion services. This is the
659 last step in the long deprecation process of v2 onion services.
660 Everyone running an earlier version, whether as a client, a relay, or
661 an onion service, should upgrade to Tor 0.3.5.17, 0.4.5.11,
664 o Major feature (onion service v2, backport from 0.4.5.11):
665 - See https://blog.torproject.org/v2-deprecation-timeline for
666 details on how to transition from v2 to v3.
667 - The control port commands HSFETCH and HSPOST no longer allow
668 version 2, and it is no longer possible to create a v2 service
670 - Tor no longer allows creating v2 services, or connecting as a
671 client to a v2 service. Relays will decline to be a v2 HSDir or
672 introduction point. This effectively disables onion service
673 version 2 Tor-wide. Closes ticket 40476.
675 o Minor features (bridge, backport from 0.4.6.8):
676 - We now announce the URL to Tor's new bridge status at
677 https://bridges.torproject.org/ when Tor is configured to run as a
678 bridge relay. Closes ticket 30477.
680 o Minor features (fallbackdir):
681 - Regenerate fallback directories for October 2021. Closes
684 o Minor bugfixes (compatibility, backport from 0.4.6.8):
685 - Fix compatibility with the most recent Libevent versions, which no
686 longer have an evdns_set_random_bytes() function. Because this
687 function has been a no-op since Libevent 2.0.4-alpha, it is safe
688 for us to just stop calling it. Fixes bug 40371; bugfix
692 Changes in version 0.4.7.1-alpha - 2021-09-17
693 This version is the first alpha release of the 0.4.7.x series. One
694 major feature is Vanguards Lite, from proposal 333, to help mitigate
695 guard discovery attacks against onion services. It also includes
698 o Major features (Proposal 332, onion services, guard selection algorithm):
699 - Clients and onion services now choose four long-lived "layer 2"
700 guard relays for use as the middle hop in all onion circuits.
701 These relays are kept in place for a randomized duration averaging
702 1 week. This mitigates guard discovery attacks against clients and
703 short-lived onion services such as OnionShare. Long-lived onion
704 services that need high security should still use the Vanguards
705 addon (https://github.com/mikeperry-tor/vanguards). Closes ticket
706 40363; implements proposal 333.
708 o Minor features (bridge testing support):
709 - Let external bridge reachability testing tools discard cached
710 bridge descriptors when setting new bridges, so they can be sure
711 to get a clean reachability test. Implements ticket 40209.
713 o Minor features (fuzzing):
714 - When building with --enable-libfuzzer, use a set of compiler flags
715 that works with more recent versions of the library. Previously we
716 were using a set of flags from 2017. Closes ticket 40407.
718 o Minor features (testing configuration):
719 - When TestingTorNetwork is enabled, skip the permissions check on
720 hidden service directories. Closes ticket 40338.
721 - On a testing network, relays can now use the
722 TestingMinTimeToReportBandwidth option to change the smallest
723 amount of time over which they're willing to report their observed
724 maximum bandwidth. Previously, this was fixed at 1 day. For
725 safety, values under 2 hours are only supported on testing
726 networks. Part of a fix for ticket 40337.
727 - Relays on testing networks no longer rate-limit how frequently
728 they are willing to report new bandwidth measurements. Part of a
729 fix for ticket 40337.
730 - Relays on testing networks now report their observed bandwidths
731 immediately from startup. Previously, they waited until they had
732 been running for a full day. Closes ticket 40337.
734 o Minor bugfixes (circuit padding):
735 - Don't send STOP circuit padding cells when the other side has
736 already shut down the corresponding padding machine. Fixes bug
737 40435; bugfix on 0.4.0.1-alpha.
739 o Minor bugfixes (compatibility):
740 - Fix compatibility with the most recent Libevent versions, which no
741 longer have an evdns_set_random_bytes() function. Because this
742 function has been a no-op since Libevent 2.0.4-alpha, it is safe
743 for us to just stop calling it. Fixes bug 40371; bugfix
746 o Minor bugfixes (control, sandbox):
747 - Allows the control command SAVECONF to succeed when the seccomp
748 sandbox is enabled. Makes SAVECONF keep only one backup file, to
749 simplify implementation. Fixes bug 40317; bugfix on 0.2.5.4-alpha.
750 Patch by Daniel Pinto.
752 o Minor bugfixes (heartbeat):
753 - Adjust the heartbeat log message about distinct clients to
754 consider the HeartbeatPeriod rather than a flat 6-hour delay.
755 Fixes bug 40330; bugfix on 0.2.6.3-alpha.
757 o Minor bugfixes (logging, relay):
758 - Add spaces between the "and" when logging the "Your server has not
759 managed to confirm reachability for its" on dual-stack relays.
760 Fixes bug 40453; bugfix on 0.4.5.1-alpha. Patch by Neel Chauhan.
762 o Minor bugfixes (onion service):
763 - Do not flag an HSDir as non-running in case the descriptor upload
764 or fetch fails. An onion service closes pending directory
765 connections before uploading a new descriptor which leads to
766 wrongly flagging many relays and thus affecting circuit path
767 selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
769 o Minor bugfixes (statistics):
770 - Fix a fencepost issue when we check stability_last_downrated where
771 we called rep_hist_downrate_old_runs() twice. Fixes bug 40394;
772 bugfix on 0.2.0.5-alpha. Patch by Neel Chauhan.
774 o Minor bugfixes (tests):
775 - Fix a bug that prevented some tests from running with the correct
776 names. Fixes bug 40365; bugfix on 0.4.3.1-alpha.
779 - Add links to original tor design paper and anonbib to
780 docs/HACKING/README.1st.md. Closes ticket 33742. Patch from
782 - Describe the "fingerprint-ed25519" file in the tor.1 man page.
783 Fixes bug 40467; bugfix on 0.4.3.1-alpha. Patch by Neel Chauhan.
786 Changes in version 0.4.6.7 - 2021-08-16
787 This version fixes several bugs from earlier versions of Tor,
788 including one that could lead to a denial-of-service attack. Everyone
789 running an earlier version, whether as a client, a relay, or an onion
790 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
792 o Major bugfixes (cryptography, security):
793 - Resolve an assertion failure caused by a behavior mismatch between
794 our batch-signature verification code and our single-signature
795 verification code. This assertion failure could be triggered
796 remotely, leading to a denial of service attack. We fix this issue
797 by disabling batch verification. Fixes bug 40078; bugfix on
798 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
799 CVE-2021-38385. Found by Henry de Valence.
801 o Minor feature (fallbackdir):
802 - Regenerate fallback directories list. Close ticket 40447.
804 o Minor features (geoip data):
805 - Update the geoip files to match the IPFire Location Database, as
806 retrieved on 2021/08/12.
808 o Minor bugfix (crypto):
809 - Disable the unused batch verification feature of ed25519-donna.
810 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
813 o Minor bugfixes (onion service):
814 - Send back the extended SOCKS error 0xF6 (Onion Service Invalid
815 Address) for a v2 onion address. Fixes bug 40421; bugfix
818 o Minor bugfixes (relay):
819 - Reduce the compression level for data streaming from HIGH to LOW
820 in order to reduce CPU load on the directory relays. Fixes bug
821 40301; bugfix on 0.3.5.1-alpha.
823 o Minor bugfixes (timekeeping):
824 - Calculate the time of day correctly on systems where the time_t
825 type includes leap seconds. (This is not the case on most
826 operating systems, but on those where it occurs, our tor_timegm
827 function did not correctly invert the system's gmtime function,
828 which could result in assertion failures when calculating voting
829 schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha.
832 Changes in version 0.4.5.10 - 2021-08-16
833 This version fixes several bugs from earlier versions of Tor,
834 including one that could lead to a denial-of-service attack. Everyone
835 running an earlier version, whether as a client, a relay, or an onion
836 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
838 o Major bugfixes (cryptography, security):
839 - Resolve an assertion failure caused by a behavior mismatch between
840 our batch-signature verification code and our single-signature
841 verification code. This assertion failure could be triggered
842 remotely, leading to a denial of service attack. We fix this issue
843 by disabling batch verification. Fixes bug 40078; bugfix on
844 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
845 CVE-2021-38385. Found by Henry de Valence.
847 o Minor feature (fallbackdir):
848 - Regenerate fallback directories list. Close ticket 40447.
850 o Minor features (geoip data):
851 - Update the geoip files to match the IPFire Location Database, as
852 retrieved on 2021/08/12.
854 o Minor features (testing):
855 - Enable the deterministic RNG for unit tests that covers the
856 address set bloomfilter-based API's. Fixes bug 40419; bugfix
859 o Minor bugfix (crypto, backport from 0.4.6.7):
860 - Disable the unused batch verification feature of ed25519-donna.
861 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
864 o Minor bugfixes (relay, backport from 0.4.6.7):
865 - Reduce the compression level for data streaming from HIGH to LOW.
866 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
868 o Minor bugfixes (timekeeping, backport from 0.4.6.7):
869 - Calculate the time of day correctly on systems where the time_t
870 type includes leap seconds. (This is not the case on most
871 operating systems, but on those where it occurs, our tor_timegm
872 function did not correctly invert the system's gmtime function,
873 which could result in assertion failures when calculating voting
874 schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha.
876 o Minor bugfixes (warnings, portability, backport from 0.4.6.6):
877 - Suppress a strict-prototype warning when building with some
878 versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.
881 Changes in version 0.3.5.16 - 2021-08-16
882 This version fixes several bugs from earlier versions of Tor,
883 including one that could lead to a denial-of-service attack. Everyone
884 running an earlier version, whether as a client, a relay, or an onion
885 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
887 o Major bugfixes (cryptography, security):
888 - Resolve an assertion failure caused by a behavior mismatch between
889 our batch-signature verification code and our single-signature
890 verification code. This assertion failure could be triggered
891 remotely, leading to a denial of service attack. We fix this issue
892 by disabling batch verification. Fixes bug 40078; bugfix on
893 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
894 CVE-2021-38385. Found by Henry de Valence.
896 o Minor feature (fallbackdir):
897 - Regenerate fallback directories list. Close ticket 40447.
899 o Minor features (geoip data):
900 - Update the geoip files to match the IPFire Location Database, as
901 retrieved on 2021/08/12.
903 o Minor bugfix (crypto, backport from 0.4.6.7):
904 - Disable the unused batch verification feature of ed25519-donna.
905 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
908 o Minor bugfixes (relay, backport from 0.4.6.7):
909 - Reduce the compression level for data streaming from HIGH to LOW.
910 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
913 Changes in version 0.4.6.6 - 2021-06-30
914 Tor 0.4.6.6 makes several small fixes on 0.4.6.5, including one that
915 allows Tor to build correctly on older versions of GCC. You should
916 upgrade to this version if you were having trouble building Tor
917 0.4.6.5; otherwise, there is probably no need.
919 o Minor bugfixes (compilation):
920 - Fix a compilation error when trying to build Tor with a compiler
921 that does not support const variables in static initializers.
922 Fixes bug 40410; bugfix on 0.4.6.5.
923 - Suppress a strict-prototype warning when building with some
924 versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.
926 o Minor bugfixes (testing):
927 - Enable the deterministic RNG for unit tests that covers the
928 address set bloomfilter-based API's. Fixes bug 40419; bugfix
932 Changes in version 0.4.5.9 - 2021-06-14
933 Tor 0.4.5.9 fixes several security issues, including a
934 denial-of-service attack against onion service clients, and another
935 denial-of-service attack against relays. Everybody should upgrade to
936 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
938 o Major bugfixes (security, backport from 0.4.6.5):
939 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
940 half-closed streams. Previously, clients failed to validate which
941 hop sent these cells: this would allow a relay on a circuit to end
942 a stream that wasn't actually built with it. Fixes bug 40389;
943 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
944 003 and CVE-2021-34548.
946 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
947 - Detect more failure conditions from the OpenSSL RNG code.
948 Previously, we would detect errors from a missing RNG
949 implementation, but not failures from the RNG code itself.
950 Fortunately, it appears those failures do not happen in practice
951 when Tor is using OpenSSL's default RNG implementation. Fixes bug
952 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
953 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
955 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
956 - Resist a hashtable-based CPU denial-of-service attack against
957 relays. Previously we used a naive unkeyed hash function to look
958 up circuits in a circuitmux object. An attacker could exploit this
959 to construct circuits with chosen circuit IDs, to create
960 collisions and make the hash table inefficient. Now we use a
961 SipHash construction here instead. Fixes bug 40391; bugfix on
962 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
963 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
964 - Fix an out-of-bounds memory access in v3 onion service descriptor
965 parsing. An attacker could exploit this bug by crafting an onion
966 service descriptor that would crash any client that tried to visit
967 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
968 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
969 Glazunov from Google's Project Zero.
971 o Minor features (compatibility, backport from 0.4.6.4-rc):
972 - Remove an assertion function related to TLS renegotiation. It was
973 used nowhere outside the unit tests, and it was breaking
974 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
977 o Minor features (geoip data):
978 - Update the geoip files to match the IPFire Location Database, as
979 retrieved on 2021/06/10.
981 o Minor bugfixes (control, sandbox, backport from 0.4.6.4-rc):
982 - Allow the control command SAVECONF to succeed when the seccomp
983 sandbox is enabled, and make SAVECONF keep only one backup file to
984 simplify implementation. Previously SAVECONF allowed a large
985 number of backup files, which made it incompatible with the
986 sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
989 o Minor bugfixes (metrics port, backport from 0.4.6.4-rc):
990 - Fix a bug that made tor try to re-bind() on an already open
991 MetricsPort every 60 seconds. Fixes bug 40370; bugfix
995 Changes in version 0.4.4.9 - 2021-06-14
996 Tor 0.4.4.9 fixes several security issues, including a
997 denial-of-service attack against onion service clients, and another
998 denial-of-service attack against relays. Everybody should upgrade to
999 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
1001 Note that the scheduled end-of-life date for the Tor 0.4.4.x series is
1002 June 15. This is therefore the last release in its series. Everybody
1003 still running 0.4.4.x should plan to upgrade to 0.4.5.x or later.
1005 o Major bugfixes (security, backport from 0.4.6.5):
1006 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
1007 half-closed streams. Previously, clients failed to validate which
1008 hop sent these cells: this would allow a relay on a circuit to end
1009 a stream that wasn't actually built with it. Fixes bug 40389;
1010 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
1011 003 and CVE-2021-34548.
1013 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
1014 - Detect more failure conditions from the OpenSSL RNG code.
1015 Previously, we would detect errors from a missing RNG
1016 implementation, but not failures from the RNG code itself.
1017 Fortunately, it appears those failures do not happen in practice
1018 when Tor is using OpenSSL's default RNG implementation. Fixes bug
1019 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
1020 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
1022 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
1023 - Resist a hashtable-based CPU denial-of-service attack against
1024 relays. Previously we used a naive unkeyed hash function to look
1025 up circuits in a circuitmux object. An attacker could exploit this
1026 to construct circuits with chosen circuit IDs, to create
1027 collisions and make the hash table inefficient. Now we use a
1028 SipHash construction here instead. Fixes bug 40391; bugfix on
1029 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
1030 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
1031 - Fix an out-of-bounds memory access in v3 onion service descriptor
1032 parsing. An attacker could exploit this bug by crafting an onion
1033 service descriptor that would crash any client that tried to visit
1034 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
1035 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
1036 Glazunov from Google's Project Zero.
1038 o Minor features (compatibility, backport from 0.4.6.4-rc):
1039 - Remove an assertion function related to TLS renegotiation. It was
1040 used nowhere outside the unit tests, and it was breaking
1041 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
1044 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
1045 - Regenerate the list of fallback directories to contain a new set
1046 of 200 relays. Closes ticket 40265.
1048 o Minor features (geoip data):
1049 - Update the geoip files to match the IPFire Location Database, as
1050 retrieved on 2021/06/10.
1052 o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
1053 - Fix a non-fatal BUG() message due to a too-early free of a string,
1054 when listing a client connection from the DoS defenses subsystem.
1055 Fixes bug 40345; bugfix on 0.4.3.4-rc.
1057 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
1058 - Fix an indentation problem that led to a warning from GCC 11.1.1.
1059 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
1062 Changes in version 0.3.5.15 - 2021-06-14
1063 Tor 0.3.5.15 fixes several security issues, including a
1064 denial-of-service attack against onion service clients, and another
1065 denial-of-service attack against relays. Everybody should upgrade to
1066 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
1068 o Major bugfixes (security, backport from 0.4.6.5):
1069 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
1070 half-closed streams. Previously, clients failed to validate which
1071 hop sent these cells: this would allow a relay on a circuit to end
1072 a stream that wasn't actually built with it. Fixes bug 40389;
1073 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
1074 003 and CVE-2021-34548.
1076 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
1077 - Detect more failure conditions from the OpenSSL RNG code.
1078 Previously, we would detect errors from a missing RNG
1079 implementation, but not failures from the RNG code itself.
1080 Fortunately, it appears those failures do not happen in practice
1081 when Tor is using OpenSSL's default RNG implementation. Fixes bug
1082 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
1083 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
1085 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
1086 - Resist a hashtable-based CPU denial-of-service attack against
1087 relays. Previously we used a naive unkeyed hash function to look
1088 up circuits in a circuitmux object. An attacker could exploit this
1089 to construct circuits with chosen circuit IDs, to create
1090 collisions and make the hash table inefficient. Now we use a
1091 SipHash construction here instead. Fixes bug 40391; bugfix on
1092 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
1093 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
1094 - Fix an out-of-bounds memory access in v3 onion service descriptor
1095 parsing. An attacker could exploit this bug by crafting an onion
1096 service descriptor that would crash any client that tried to visit
1097 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
1098 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
1099 Glazunov from Google's Project Zero.
1101 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
1102 - Fix an indentation problem that led to a warning from GCC 11.1.1.
1103 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
1105 o Minor features (compatibility, backport from 0.4.6.4-rc):
1106 - Remove an assertion function related to TLS renegotiation. It was
1107 used nowhere outside the unit tests, and it was breaking
1108 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
1111 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
1112 - Regenerate the list of fallback directories to contain a new set
1113 of 200 relays. Closes ticket 40265.
1115 o Minor features (geoip data):
1116 - Update the geoip files to match the IPFire Location Database, as
1117 retrieved on 2021/06/10.
1120 Changes in version 0.4.6.5 - 2021-06-14
1121 Tor 0.4.6.5 is the first stable release in its series. The 0.4.6.x
1122 series includes numerous features and bugfixes, including a significant
1123 improvement to our circuit timeout algorithm that should improve
1124 observed client performance, and a way for relays to report when they are
1127 This release also includes security fixes for several security issues,
1128 including a denial-of-service attack against onion service clients,
1129 and another denial-of-service attack against relays. Everybody should
1130 upgrade to one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
1132 Below are the changes since 0.4.6.4-rc. For a complete list of changes
1133 since 0.4.5.8, see the ReleaseNotes file.
1135 o Major bugfixes (security):
1136 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
1137 half-closed streams. Previously, clients failed to validate which
1138 hop sent these cells: this would allow a relay on a circuit to end
1139 a stream that wasn't actually built with it. Fixes bug 40389;
1140 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
1141 003 and CVE-2021-34548.
1143 o Major bugfixes (security, defense-in-depth):
1144 - Detect more failure conditions from the OpenSSL RNG code.
1145 Previously, we would detect errors from a missing RNG
1146 implementation, but not failures from the RNG code itself.
1147 Fortunately, it appears those failures do not happen in practice
1148 when Tor is using OpenSSL's default RNG implementation. Fixes bug
1149 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
1150 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
1152 o Major bugfixes (security, denial of service):
1153 - Resist a hashtable-based CPU denial-of-service attack against
1154 relays. Previously we used a naive unkeyed hash function to look
1155 up circuits in a circuitmux object. An attacker could exploit this
1156 to construct circuits with chosen circuit IDs, to create
1157 collisions and make the hash table inefficient. Now we use a
1158 SipHash construction here instead. Fixes bug 40391; bugfix on
1159 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
1160 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
1161 - Fix an out-of-bounds memory access in v3 onion service descriptor
1162 parsing. An attacker could exploit this bug by crafting an onion
1163 service descriptor that would crash any client that tried to visit
1164 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
1165 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
1166 Glazunov from Google's Project Zero.
1168 o Minor features (geoip data):
1169 - Update the geoip files to match the IPFire Location Database, as
1170 retrieved on 2021/06/10.
1172 o Minor features (logging, diagnostic):
1173 - Log decompression failures at a higher severity level, since they
1174 can help provide missing context for other warning messages. We
1175 rate-limit these messages, to avoid flooding the logs if they
1176 begin to occur frequently. Closes ticket 40175.
1179 Changes in version 0.4.6.4-rc - 2021-05-28
1180 Tor 0.4.6.4-rc fixes a few bugs from previous releases. This, we hope,
1181 the final release candidate in its series: unless major new issues are
1182 found, the next release will be stable.
1184 o Minor features (compatibility):
1185 - Remove an assertion function related to TLS renegotiation. It was
1186 used nowhere outside the unit tests, and it was breaking
1187 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
1190 o Minor bugfixes (consensus handling):
1191 - Avoid a set of bugs that could be caused by inconsistently
1192 preferring an out-of-date consensus stored in a stale directory
1193 cache over a more recent one stored on disk as the latest
1194 consensus. Fixes bug 40375; bugfix on 0.3.1.1-alpha.
1196 o Minor bugfixes (control, sandbox):
1197 - Allow the control command SAVECONF to succeed when the seccomp
1198 sandbox is enabled, and make SAVECONF keep only one backup file to
1199 simplify implementation. Previously SAVECONF allowed a large
1200 number of backup files, which made it incompatible with the
1201 sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
1204 o Minor bugfixes (metrics port):
1205 - Fix a bug that made tor try to re-bind() on an already open
1206 MetricsPort every 60 seconds. Fixes bug 40370; bugfix
1210 - Remove unneeded code for parsing private keys in directory
1211 documents. This code was only used for client authentication in v2
1212 onion services, which are now unsupported. Closes ticket 40374.
1215 Changes in version 0.4.5.8 - 2021-05-10
1216 Tor 0.4.5.8 fixes several bugs in earlier version, backporting fixes
1217 from the 0.4.6.x series.
1219 o Minor features (compatibility, Linux seccomp sandbox, backport from 0.4.6.3-rc):
1220 - Add a workaround to enable the Linux sandbox to work correctly
1221 with Glibc 2.33. This version of Glibc has started using the
1222 fstatat() system call, which previously our sandbox did not allow.
1223 Closes ticket 40382; see the ticket for a discussion of trade-offs.
1225 o Minor features (compilation, backport from 0.4.6.3-rc):
1226 - Make the autoconf script build correctly with autoconf versions
1227 2.70 and later. Closes part of ticket 40335.
1229 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
1230 - Regenerate the list of fallback directories to contain a new set
1231 of 200 relays. Closes ticket 40265.
1233 o Minor features (geoip data):
1234 - Update the geoip files to match the IPFire Location Database, as
1235 retrieved on 2021/05/07.
1237 o Minor features (onion services):
1238 - Add warning message when connecting to now deprecated v2 onion
1239 services. As announced, Tor 0.4.5.x is the last series that will
1240 support v2 onions. Closes ticket 40373.
1242 o Minor bugfixes (bridge, pluggable transport, backport from 0.4.6.2-alpha):
1243 - Fix a regression that made it impossible start Tor using a bridge
1244 line with a transport name and no fingerprint. Fixes bug 40360;
1245 bugfix on 0.4.5.4-rc.
1247 o Minor bugfixes (build, cross-compilation, backport from 0.4.6.3-rc):
1248 - Allow a custom "ar" for cross-compilation. Our previous build
1249 script had used the $AR environment variable in most places, but
1250 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
1252 o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
1253 - Fix a non-fatal BUG() message due to a too-early free of a string,
1254 when listing a client connection from the DoS defenses subsystem.
1255 Fixes bug 40345; bugfix on 0.4.3.4-rc.
1257 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
1258 - Fix an indentation problem that led to a warning from GCC 11.1.1.
1259 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
1261 o Minor bugfixes (controller, backport from 0.4.6.1-alpha):
1262 - Fix a "BUG" warning that would appear when a controller chooses
1263 the first hop for a circuit, and that circuit completes. Fixes bug
1264 40285; bugfix on 0.3.2.1-alpha.
1266 o Minor bugfixes (onion service, client, memory leak, backport from 0.4.6.3-rc):
1267 - Fix a bug where an expired cached descriptor could get overwritten
1268 with a new one without freeing it, leading to a memory leak. Fixes
1269 bug 40356; bugfix on 0.3.5.1-alpha.
1271 o Minor bugfixes (testing, BSD, backport from 0.4.6.2-alpha):
1272 - Fix pattern-matching errors when patterns expand to invalid paths
1273 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
1277 Changes in version 0.4.6.3-rc - 2021-05-10
1278 Tor 0.4.6.3-rc is the first release candidate in its series. It fixes
1279 a few small bugs from previous versions, and adds a better error
1280 message when trying to use (no longer supported) v2 onion services.
1282 Though we anticipate that we'll be doing a bit more clean-up between
1283 now and the stable release, we expect that our remaining changes will
1284 be fairly simple. There will likely be at least one more release
1285 candidate before 0.4.6.x is stable.
1287 o Major bugfixes (onion service, control port):
1288 - Make the ADD_ONION command properly configure client authorization.
1289 Before this fix, the created onion failed to add the client(s).
1290 Fixes bug 40378; bugfix on 0.4.6.1-alpha.
1292 o Minor features (compatibility, Linux seccomp sandbox):
1293 - Add a workaround to enable the Linux sandbox to work correctly
1294 with Glibc 2.33. This version of Glibc has started using the
1295 fstatat() system call, which previously our sandbox did not allow.
1296 Closes ticket 40382; see the ticket for a discussion of trade-offs.
1298 o Minor features (compilation):
1299 - Make the autoconf script build correctly with autoconf versions
1300 2.70 and later. Closes part of ticket 40335.
1302 o Minor features (geoip data):
1303 - Update the geoip files to match the IPFire Location Database, as
1304 retrieved on 2021/05/07.
1306 o Minor features (onion services):
1307 - Add a warning message when trying to connect to (no longer
1308 supported) v2 onion services. Closes ticket 40373.
1310 o Minor bugfixes (build, cross-compilation):
1311 - Allow a custom "ar" for cross-compilation. Our previous build
1312 script had used the $AR environment variable in most places, but
1313 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
1315 o Minor bugfixes (compiler warnings):
1316 - Fix an indentation problem that led to a warning from GCC 11.1.1.
1317 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
1319 o Minor bugfixes (logging, relay):
1320 - Emit a warning if an Address is found to be internal and tor can't
1321 use it. Fixes bug 40290; bugfix on 0.4.5.1-alpha.
1323 o Minor bugfixes (onion service, client, memory leak):
1324 - Fix a bug where an expired cached descriptor could get overwritten
1325 with a new one without freeing it, leading to a memory leak. Fixes
1326 bug 40356; bugfix on 0.3.5.1-alpha.
1329 Changes in version 0.4.6.2-alpha - 2021-04-15
1330 Tor 0.4.6.2-alpha is the second alpha in its series. It fixes several
1331 small bugs in previous releases, and solves other issues that had
1332 enabled denial-of-service attacks and affected integration with
1335 o Minor features (client):
1336 - Clients now check whether their streams are attempting to re-enter
1337 the Tor network (i.e. to send Tor traffic over Tor), and close
1338 them preemptively if they think exit relays will refuse them for
1339 this reason. See ticket 2667 for details. Closes ticket 40271.
1341 o Minor features (command line):
1342 - Add long format name "--torrc-file" equivalent to the existing
1343 command-line option "-f". Closes ticket 40324. Patch by
1346 o Minor features (dormant mode):
1347 - Add a new 'DormantTimeoutEnabled' option to allow coarse-grained
1348 control over whether the client ever becomes dormant from
1349 inactivity. Most people won't need this. Closes ticket 40228.
1351 o Minor features (fallback directory list):
1352 - Regenerate the list of fallback directories to contain a new set
1353 of 200 relays. Closes ticket 40265.
1355 o Minor features (geoip data):
1356 - Update the geoip files to match the IPFire Location Database, as
1357 retrieved on 2021/04/13.
1359 o Minor features (logging):
1360 - Edit heartbeat log messages so that more of them begin with the
1361 string "Heartbeat: ". Closes ticket 40322; patch
1364 o Minor bugfixes (bridge, pluggable transport):
1365 - Fix a regression that made it impossible start Tor using a bridge
1366 line with a transport name and no fingerprint. Fixes bug 40360;
1367 bugfix on 0.4.5.4-rc.
1369 o Minor bugfixes (channel, DoS):
1370 - Fix a non-fatal BUG() message due to a too-early free of a string,
1371 when listing a client connection from the DoS defenses subsystem.
1372 Fixes bug 40345; bugfix on 0.4.3.4-rc.
1374 o Minor bugfixes (compilation):
1375 - Fix a compilation warning about unused functions when building
1376 with a libc that lacks the GLOB_ALTDIRFUNC constant. Fixes bug
1377 40354; bugfix on 0.4.5.1-alpha. Patch by Daniel Pinto.
1379 o Minor bugfixes (configuration):
1380 - Fix pattern-matching for directories on all platforms when using
1381 %include options in configuration files. This patch also fixes
1382 compilation on musl libc based systems. Fixes bug 40141; bugfix
1385 o Minor bugfixes (relay):
1386 - Move the "overload-general" line from extrainfo to the server
1387 descriptor. Fixes bug 40364; bugfix on 0.4.6.1-alpha.
1389 o Minor bugfixes (testing, BSD):
1390 - Fix pattern-matching errors when patterns expand to invalid paths
1391 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
1394 o Documentation (manual):
1395 - Move the ServerTransport* options to the "SERVER OPTIONS" section.
1397 - Indicate that the HiddenServiceStatistics option also applies to
1398 bridges. Closes ticket 40346.
1399 - Move the description of BridgeRecordUsageByCountry to the section
1400 "STATISTICS OPTIONS". Closes ticket 40323.
1403 Changes in version 0.4.6.1-alpha - 2021-03-18
1404 Tor 0.4.6.1-alpha is the first alpha release in the 0.4.6.x series. It
1405 improves client circuit performance, adds missing features, and
1406 improves some of our DoS handling and statistics reporting. It also
1407 includes numerous smaller bugfixes.
1409 Below are the changes since 0.4.5.7. (Note that this release DOES
1410 include the fixes for the security bugs already fixed in 0.4.5.7.)
1412 o Major features (control port, onion services):
1413 - Add controller support for creating version 3 onion services with
1414 client authorization. Previously, only v2 onion services could be
1415 created with client authorization. Closes ticket 40084. Patch by
1418 o Major features (directory authority):
1419 - When voting on a relay with a Sybil-like appearance, add the Sybil
1420 flag when clearing out the other flags. This lets a relay operator
1421 know why their relay hasn't been included in the consensus. Closes
1422 ticket 40255. Patch by Neel Chauhan.
1424 o Major features (metrics):
1425 - Relays now report how overloaded they are in their extrainfo
1426 documents. This information is controlled with the
1427 OverloadStatistics torrc option, and it will be used to improve
1428 decisions about the network's load balancing. Implements proposal
1429 328; closes ticket 40222.
1431 o Major features (relay, denial of service):
1432 - Add a new DoS subsystem feature to control the rate of client
1433 connections for relays. Closes ticket 40253.
1435 o Major features (statistics):
1436 - Relays now publish statistics about the number of v3 onion
1437 services and volume of v3 onion service traffic, in the same
1438 manner they already do for v2 onions. Closes ticket 23126.
1440 o Major bugfixes (circuit build timeout):
1441 - Improve the accuracy of our circuit build timeout calculation for
1442 60%, 70%, and 80% build rates for various guard choices. We now
1443 use a maximum likelihood estimator for Pareto parameters of the
1444 circuit build time distribution, instead of a "right-censored
1445 estimator". This causes clients to ignore circuits that never
1446 finish building in their timeout calculations. Previously, clients
1447 were counting such unfinished circuits as having the highest
1448 possible build time value, when in reality these circuits most
1449 likely just contain relays that are offline. We also now wait a
1450 bit longer to let circuits complete for measurement purposes,
1451 lower the minimum possible effective timeout from 1.5 seconds to
1452 10ms, and increase the resolution of the circuit build time
1453 histogram from 50ms bin widths to 10ms bin widths. Additionally,
1454 we alter our estimate Xm by taking the maximum of the top 10 most
1455 common build time values of the 10ms histogram, and compute Xm as
1456 the average of these. Fixes bug 40168; bugfix on 0.2.2.14-alpha.
1457 - Remove max_time calculation and associated warning from circuit
1458 build timeout 'alpha' parameter estimation, as this is no longer
1459 needed by our new estimator from 40168. Fixes bug 34088; bugfix
1462 o Major bugfixes (signing key):
1463 - In the tor-gencert utility, give an informative error message if
1464 the passphrase given in `--create-identity-key` is too short.
1465 Fixes bug 40189; bugfix on 0.2.0.1-alpha. Patch by Neel Chauhan.
1467 o Minor features (bridge):
1468 - We now announce the URL to Tor's new bridge status at
1469 https://bridges.torproject.org/ when Tor is configured to run as a
1470 bridge relay. Closes ticket 30477.
1472 o Minor features (build system):
1473 - New "make lsp" command to auto generate the compile_commands.json
1474 file used by the ccls server. The "bear" program is needed for
1475 this. Closes ticket 40227.
1477 o Minor features (command-line interface):
1478 - Add build informations to `tor --version` in order to ease
1479 reproducible builds. Closes ticket 32102.
1480 - When parsing command-line flags that take an optional argument,
1481 treat the argument as absent if it would start with a '-'
1482 character. Arguments in that form are not intelligible for any of
1483 our optional-argument flags. Closes ticket 40223.
1484 - Allow a relay operator to list the ed25519 keys on the command
1485 line by adding the `rsa` and `ed25519` arguments to the
1486 --list-fingerprint flag to show the respective RSA and ed25519
1487 relay fingerprint. Closes ticket 33632. Patch by Neel Chauhan.
1489 o Minor features (control port, stream handling):
1490 - Add the stream ID to the event line in the ADDRMAP control event.
1491 Closes ticket 40249. Patch by Neel Chauhan.
1493 o Minor features (dormant mode):
1494 - Add a new 'DormantTimeoutEnabled' option for coarse-grained
1495 control over whether the client can become dormant from
1496 inactivity. Most people won't need this. Closes ticket 40228.
1498 o Minor features (logging):
1499 - Change the DoS subsystem heartbeat line format to be more clear on
1500 what has been detected/rejected, and which option is disabled (if
1501 any). Closes ticket 40308.
1502 - In src/core/mainloop/mainloop.c and src/core/mainloop/connection.c,
1503 put brackets around IPv6 addresses in log messages. Closes ticket
1504 40232. Patch by Neel Chauhan.
1506 o Minor features (performance, windows):
1507 - Use SRWLocks to implement locking on Windows. Replaces the
1508 "critical section" locking implementation with the faster
1509 SRWLocks, available since Windows Vista. Closes ticket 17927.
1510 Patch by Daniel Pinto.
1512 o Minor features (protocol, proxy support, defense in depth):
1513 - Close HAProxy connections if they somehow manage to send us data
1514 before we start reading. Closes another case of ticket 40017.
1516 o Minor features (tests, portability):
1517 - Port the hs_build_address.py test script to work with recent
1518 versions of python. Closes ticket 40213. Patch from
1521 o Minor features (vote document):
1522 - Add a "stats" line to directory authority votes, to report various
1523 statistics that authorities compute about the relays. This will
1524 help us diagnose the network better. Closes ticket 40314.
1526 o Minor bugfixes (build):
1527 - The configure script now shows whether or not lzma and zstd have
1528 been used, not just if the enable flag was passed in. Fixes bug
1529 40236; bugfix on 0.4.3.1-alpha.
1531 o Minor bugfixes (compatibility):
1532 - Fix a failure in the test cases when running on the "hppa"
1533 architecture, along with a related test that might fail on other
1534 architectures in the future. Fixes bug 40274; bugfix
1537 o Minor bugfixes (controller):
1538 - Fix a "BUG" warning that would appear when a controller chooses
1539 the first hop for a circuit, and that circuit completes. Fixes bug
1540 40285; bugfix on 0.3.2.1-alpha.
1542 o Minor bugfixes (directory authorities, voting):
1543 - Add a new consensus method (31) to support any future changes that
1544 authorities decide to make to the value of bwweightscale or
1545 maxunmeasuredbw. Previously, there was a bug that prevented the
1546 authorities from parsing these consensus parameters correctly under
1547 most circumstances. Fixes bug 19011; bugfix on 0.2.2.10-alpha.
1549 o Minor bugfixes (ipv6):
1550 - Allow non-SOCKSPorts to disable IPv4, IPv6, and PreferIPv4. Some
1551 rare configurations might break, but in this case you can disable
1552 NoIPv4Traffic and NoIPv6Traffic as needed. Fixes bug 33607; bugfix
1553 on 0.4.1.1-alpha. Patch by Neel Chauhan.
1555 o Minor bugfixes (key generation):
1556 - Do not require a valid torrc when using the `--keygen` argument to
1557 generate a signing key. This allows us to generate keys on systems
1558 or users which may not run Tor. Fixes bug 40235; bugfix on
1559 0.2.7.2-alpha. Patch by Neel Chauhan.
1561 o Minor bugfixes (onion services, logging):
1562 - Downgrade the severity of a few rendezvous circuit-related
1563 warnings from warning to info. Fixes bug 40207; bugfix on
1564 0.3.2.1-alpha. Patch by Neel Chauhan.
1566 o Minor bugfixes (relay):
1567 - Reduce the compression level for data streaming from HIGH to LOW.
1568 This should reduce the CPU and memory burden for directory caches.
1569 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
1571 o Code simplification and refactoring:
1572 - Remove the orconn_ext_or_id_map structure and related functions.
1573 (Nothing outside of unit tests used them.) Closes ticket 33383.
1574 Patch by Neel Chauhan.
1577 - As of this release, Tor no longer supports the old v2 onion
1578 services. They were deprecated last July for security, and support
1579 will be removed entirely later this year. We strongly encourage
1580 everybody to migrate to v3 onion services. For more information,
1581 see https://blog.torproject.org/v2-deprecation-timeline . Closes
1582 ticket 40266. (NOTE: We accidentally released an earlier version
1583 of the 0.4.6.1-alpha changelog without this entry. Sorry for
1586 o Code simplification and refactoring (metrics, DoS):
1587 - Move the DoS subsystem into the subsys manager, including its
1588 configuration options. Closes ticket 40261.
1590 o Removed features (relay):
1591 - Because DirPorts are only used on authorities, relays no longer
1592 advertise them. Similarly, self-testing for DirPorts has been
1593 disabled, since an unreachable DirPort is no reason for a relay
1594 not to advertise itself. (Configuring a DirPort will still work,
1595 for now.) Closes ticket 40282.
1598 Changes in version 0.3.5.14 - 2021-03-16
1599 Tor 0.3.5.14 backports fixes for two important denial-of-service bugs
1600 in earlier versions of Tor.
1602 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
1603 who can send directory data to a Tor instance to force that Tor
1604 instance to consume huge amounts of CPU. This is easiest to exploit
1605 against authorities, since anybody can upload to them, but directory
1606 caches could also exploit this vulnerability against relays or clients
1607 when they download. The other vulnerability (TROVE-2021-002) only
1608 affects directory authorities, and would allow an attacker to remotely
1609 crash the authority with an assertion failure. Patches have already
1610 been provided to the authority operators, to help ensure
1613 We recommend that everybody upgrade to one of the releases that fixes
1614 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
1617 This release also updates our GeoIP data source, and fixes a
1618 compatibility issue.
1620 o Major bugfixes (security, denial of service, backport from 0.4.5.7):
1621 - Disable the dump_desc() function that we used to dump unparseable
1622 information to disk. It was called incorrectly in several places,
1623 in a way that could lead to excessive CPU usage. Fixes bug 40286;
1624 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
1625 001 and CVE-2021-28089.
1626 - Fix a bug in appending detached signatures to a pending consensus
1627 document that could be used to crash a directory authority. Fixes
1628 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
1631 o Minor features (geoip data, backport from 0.4.5.7):
1632 - We have switched geoip data sources. Previously we shipped IP-to-
1633 country mappings from Maxmind's GeoLite2, but in 2019 they changed
1634 their licensing terms, so we were unable to update them after that
1635 point. We now ship geoip files based on the IPFire Location
1636 Database instead. (See https://location.ipfire.org/ for more
1637 information). This release updates our geoip files to match the
1638 IPFire Location Database as retrieved on 2021/03/12. Closes
1641 o Removed features (mallinfo deprecated, backport from 0.4.5.7):
1642 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
1643 Closes ticket 40309.
1646 Changes in version 0.4.4.8 - 2021-03-16
1647 Tor 0.4.4.8 backports fixes for two important denial-of-service bugs
1648 in earlier versions of Tor.
1650 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
1651 who can send directory data to a Tor instance to force that Tor
1652 instance to consume huge amounts of CPU. This is easiest to exploit
1653 against authorities, since anybody can upload to them, but directory
1654 caches could also exploit this vulnerability against relays or clients
1655 when they download. The other vulnerability (TROVE-2021-002) only
1656 affects directory authorities, and would allow an attacker to remotely
1657 crash the authority with an assertion failure. Patches have already
1658 been provided to the authority operators, to help ensure
1661 We recommend that everybody upgrade to one of the releases that fixes
1662 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
1665 This release also updates our GeoIP data source, and fixes a
1666 compatibility issue.
1668 o Major bugfixes (security, denial of service, backport from 0.4.5.7):
1669 - Disable the dump_desc() function that we used to dump unparseable
1670 information to disk. It was called incorrectly in several places,
1671 in a way that could lead to excessive CPU usage. Fixes bug 40286;
1672 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
1673 001 and CVE-2021-28089.
1674 - Fix a bug in appending detached signatures to a pending consensus
1675 document that could be used to crash a directory authority. Fixes
1676 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
1679 o Minor features (geoip data, backport from 0.4.5.7):
1680 - We have switched geoip data sources. Previously we shipped IP-to-
1681 country mappings from Maxmind's GeoLite2, but in 2019 they changed
1682 their licensing terms, so we were unable to update them after that
1683 point. We now ship geoip files based on the IPFire Location
1684 Database instead. (See https://location.ipfire.org/ for more
1685 information). This release updates our geoip files to match the
1686 IPFire Location Database as retrieved on 2021/03/12. Closes
1689 o Removed features (mallinfo deprecated, backport from 0.4.5.7):
1690 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
1691 Closes ticket 40309.
1694 Changes in version 0.4.5.7 - 2021-03-16
1695 Tor 0.4.5.7 fixes two important denial-of-service bugs in earlier
1698 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
1699 who can send directory data to a Tor instance to force that Tor
1700 instance to consume huge amounts of CPU. This is easiest to exploit
1701 against authorities, since anybody can upload to them, but directory
1702 caches could also exploit this vulnerability against relays or clients
1703 when they download. The other vulnerability (TROVE-2021-002) only
1704 affects directory authorities, and would allow an attacker to remotely
1705 crash the authority with an assertion failure. Patches have already
1706 been provided to the authority operators, to help ensure
1709 We recommend that everybody upgrade to one of the releases that fixes
1710 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
1713 This release also updates our GeoIP data source, and fixes a few
1714 smaller bugs in earlier releases.
1716 o Major bugfixes (security, denial of service):
1717 - Disable the dump_desc() function that we used to dump unparseable
1718 information to disk. It was called incorrectly in several places,
1719 in a way that could lead to excessive CPU usage. Fixes bug 40286;
1720 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
1721 001 and CVE-2021-28089.
1722 - Fix a bug in appending detached signatures to a pending consensus
1723 document that could be used to crash a directory authority. Fixes
1724 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
1727 o Minor features (geoip data):
1728 - We have switched geoip data sources. Previously we shipped IP-to-
1729 country mappings from Maxmind's GeoLite2, but in 2019 they changed
1730 their licensing terms, so we were unable to update them after that
1731 point. We now ship geoip files based on the IPFire Location
1732 Database instead. (See https://location.ipfire.org/ for more
1733 information). This release updates our geoip files to match the
1734 IPFire Location Database as retrieved on 2021/03/12. Closes
1737 o Minor bugfixes (directory authority):
1738 - Now that exit relays don't allow exit connections to directory
1739 authority DirPorts (to prevent network reentry), disable
1740 authorities' reachability self test on the DirPort. Fixes bug
1741 40287; bugfix on 0.4.5.5-rc.
1743 o Minor bugfixes (documentation):
1744 - Fix a formatting error in the documentation for
1745 VirtualAddrNetworkIPv6. Fixes bug 40256; bugfix on 0.2.9.4-alpha.
1747 o Minor bugfixes (Linux, relay):
1748 - Fix a bug in determining total available system memory that would
1749 have been triggered if the format of Linux's /proc/meminfo file
1750 had ever changed to include "MemTotal:" in the middle of a line.
1751 Fixes bug 40315; bugfix on 0.2.5.4-alpha.
1753 o Minor bugfixes (metrics port):
1754 - Fix a BUG() warning on the MetricsPort for an internal missing
1755 handler. Fixes bug 40295; bugfix on 0.4.5.1-alpha.
1757 o Minor bugfixes (onion service):
1758 - Remove a harmless BUG() warning when reloading tor configured with
1759 onion services. Fixes bug 40334; bugfix on 0.4.5.1-alpha.
1761 o Minor bugfixes (portability):
1762 - Fix a non-portable usage of "==" with "test" in the configure
1763 script. Fixes bug 40298; bugfix on 0.4.5.1-alpha.
1765 o Minor bugfixes (relay):
1766 - Remove a spammy log notice falsely claiming that the IPv4/v6
1767 address was missing. Fixes bug 40300; bugfix on 0.4.5.1-alpha.
1768 - Do not query the address cache early in the boot process when
1769 deciding if a relay needs to fetch early directory information
1770 from an authority. This bug resulted in a relay falsely believing
1771 it didn't have an address and thus triggering an authority fetch
1772 at each boot. Related to our fix for 40300.
1774 o Removed features (mallinfo deprecated):
1775 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
1776 Closes ticket 40309.
1779 Changes in version 0.4.5.6 - 2021-02-15
1780 The Tor 0.4.5.x release series is dedicated to the memory of Karsten
1781 Loesing (1979-2020), Tor developer, cypherpunk, husband, and father.
1782 Karsten is best known for creating the Tor metrics portal and leading
1783 the metrics team, but he was involved in Tor from the early days. For
1784 example, while he was still a student he invented and implemented the
1785 v2 onion service directory design, and he also served as an ambassador
1786 to the many German researchers working in the anonymity field. We
1787 loved him and respected him for his patience, his consistency, and his
1788 welcoming approach to growing our community.
1790 This release series introduces significant improvements in relay IPv6
1791 address discovery, a new "MetricsPort" mechanism for relay operators
1792 to measure performance, LTTng support, build system improvements to
1793 help when using Tor as a static library, and significant bugfixes
1794 related to Windows relay performance. It also includes numerous
1795 smaller features and bugfixes.
1797 Below are the changes since 0.4.4.4-rc. For a complete list of changes
1798 since 0.4.4.7, see the ReleaseNotes file.
1800 o Major bugfixes (IPv6, relay):
1801 - Fix a bug that prevented a relay from publishing its descriptor if
1802 an auto-discovered IPv6 that was found unreachable. Fixes bug
1803 40279; bugfix on 0.4.5.1-alpha.
1805 o Minor features (protocol versions):
1806 - Stop claiming to support the "DirCache=1" subprotocol version.
1807 Technically, we stopped supporting this subprotocol back in
1808 0.4.5.1-alpha, but we needed to wait for the authorities to stop
1809 listing it as "required" before we could drop it from the list.
1810 Closes ticket 40221.
1812 o Minor bugfixes (logging):
1813 - Avoid a spurious log message about missing subprotocol versions,
1814 when the consensus that we're reading from is older than the
1815 current release. Previously we had made this message nonfatal, but
1816 in practice, it is never relevant when the consensus is older than
1817 the current release. Fixes bug 40281; bugfix on 0.4.0.1-alpha.
1819 o Minor bugfixes (metrics port):
1820 - Fix a bug warning when a metrics port socket was unexpectedly
1821 closed. Fixes bug 40257; bugfix on 0.4.5.1-alpha
1823 o Minor bugfixes (relay):
1824 - Allow relays to have a RFC1918 address if PublishServerDescriptor
1825 is set to 0 and AssumeReachable is set to 1. This is to support
1826 the use case of a bridge on a local network, exposed via a
1827 pluggable transport. Fixes bug 40208; bugfix on 0.4.5.1-alpha.
1829 o Minor bugfixes (relay, config):
1830 - Fix a problem in the removal of duplicate ORPorts from the
1831 internal port list when loading the config file. We were removing
1832 the wrong ports, breaking valid torrc uses cases for multiple
1833 ORPorts of the same address family. Fixes bug 40289; bugfix
1837 Changes in version 0.4.4.7 - 2021-02-03
1838 Tor 0.4.4.7 backports numerous bugfixes from later releases,
1839 including one that made v3 onion services more susceptible to
1840 denial-of-service attacks, and a feature that makes some kinds of
1841 DoS attacks harder to perform.
1843 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
1844 - Stop requiring a live consensus for v3 clients and services, and
1845 allow a "reasonably live" consensus instead. This allows v3 onion
1846 services to work even if the authorities fail to generate a
1847 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1850 o Major feature (exit, backport from 0.4.5.5-rc):
1851 - Re-entry into the network is now denied at the Exit level to all
1852 relays' ORPorts and authorities' ORPorts and DirPorts. This change
1853 should help mitgate a set of denial-of-service attacks. Closes
1856 o Minor feature (build system, backport from 0.4.5.4-rc):
1857 - New "make lsp" command to generate the compile_commands.json file
1858 used by the ccls language server. The "bear" program is needed for
1859 this. Closes ticket 40227.
1861 o Minor features (compilation, backport from 0.4.5.2-rc):
1862 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
1863 later. There are a number of APIs newly deprecated in OpenSSL
1864 3.0.0 that Tor still requires. (A later version of Tor will try to
1865 stop depending on these APIs.) Closes ticket 40165.
1867 o Minor features (crypto, backport from 0.4.5.3-rc):
1868 - Fix undefined behavior on our Keccak library. The bug only
1869 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
1870 and would result in wrong digests. Fixes bug 40210; bugfix on
1871 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
1872 weasel for diagnosing this.
1874 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
1875 - Strip '\r' characters when reading text files on Unix platforms.
1876 This should resolve an issue where a relay operator migrates a
1877 relay from Windows to Unix, but does not change the line ending of
1878 Tor's various state files to match the platform, and the CRLF line
1879 endings from Windows end up leaking into other files such as the
1880 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
1882 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
1883 - Fix a compilation warning about unreachable fallthrough
1884 annotations when building with "--enable-all-bugs-are-fatal" on
1885 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
1887 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
1888 - Handle partial SOCKS5 messages correctly. Previously, our code
1889 would send an incorrect error message if it got a SOCKS5 request
1890 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
1892 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
1893 - Fix the `config/parse_tcp_proxy_line` test so that it works
1894 correctly on systems where the DNS provider hijacks invalid
1895 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
1896 - Fix our Python reference-implementation for the v3 onion service
1897 handshake so that it works correctly with the version of hashlib
1898 provided by Python 3.9. Fixes part of bug 40179; bugfix
1900 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
1901 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
1904 Changes in version 0.4.3.8 - 2021-02-03
1905 Tor 0.4.3.8 backports numerous bugfixes from later releases,
1906 including one that made v3 onion services more susceptible to
1907 denial-of-service attacks, and a feature that makes some kinds of
1908 DoS attacks harder to perform.
1910 Note that this is, in all likelihood, the last release of Tor 0.4.3.x,
1911 which will reach end-of-life on 15 Feb 2021.
1913 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
1914 - Stop requiring a live consensus for v3 clients and services, and
1915 allow a "reasonably live" consensus instead. This allows v3 onion
1916 services to work even if the authorities fail to generate a
1917 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1920 o Major bugfixes (stats, onion services, backport from 0.4.4.5):
1921 - Fix a bug where we were undercounting the Tor network's total
1922 onion service traffic, by ignoring any traffic originating from
1923 clients. Now we count traffic from both clients and services.
1924 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
1926 o Major feature (exit, backport from 0.4.5.5-rc):
1927 - Re-entry into the network is now denied at the Exit level to all
1928 relays' ORPorts and authorities' ORPorts and DirPorts. This change
1929 should help mitgate a set of denial-of-service attacks. Closes
1932 o Minor feature (build system, backport from 0.4.5.4-rc):
1933 - New "make lsp" command to generate the compile_commands.json file
1934 used by the ccls language server. The "bear" program is needed for
1935 this. Closes ticket 40227.
1937 o Minor features (compilation, backport from 0.4.5.2-rc):
1938 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
1939 later. There are a number of APIs newly deprecated in OpenSSL
1940 3.0.0 that Tor still requires. (A later version of Tor will try to
1941 stop depending on these APIs.) Closes ticket 40165.
1943 o Minor features (crypto, backport from 0.4.5.3-rc):
1944 - Fix undefined behavior on our Keccak library. The bug only
1945 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
1946 and would result in wrong digests. Fixes bug 40210; bugfix on
1947 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
1948 weasel for diagnosing this.
1950 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
1951 - Strip '\r' characters when reading text files on Unix platforms.
1952 This should resolve an issue where a relay operator migrates a
1953 relay from Windows to Unix, but does not change the line ending of
1954 Tor's various state files to match the platform, and the CRLF line
1955 endings from Windows end up leaking into other files such as the
1956 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
1958 o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
1959 - Resolve a compilation warning that could occur in
1960 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
1962 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
1963 - Fix a compilation warning about unreachable fallthrough
1964 annotations when building with "--enable-all-bugs-are-fatal" on
1965 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
1967 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
1968 - Handle partial SOCKS5 messages correctly. Previously, our code
1969 would send an incorrect error message if it got a SOCKS5 request
1970 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
1972 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
1973 - Fix the `config/parse_tcp_proxy_line` test so that it works
1974 correctly on systems where the DNS provider hijacks invalid
1975 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
1976 - Fix our Python reference-implementation for the v3 onion service
1977 handshake so that it works correctly with the version of hashlib
1978 provided by Python 3.9. Fixes part of bug 40179; bugfix
1980 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
1981 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
1984 Changes in version 0.3.5.13 - 2020-02-03
1985 Tor 0.3.5.13 backports numerous bugfixes from later releases,
1986 including one that made v3 onion services more susceptible to
1987 denial-of-service attacks, and a feature that makes some kinds of
1988 DoS attacks harder to perform.
1990 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
1991 - Stop requiring a live consensus for v3 clients and services, and
1992 allow a "reasonably live" consensus instead. This allows v3 onion
1993 services to work even if the authorities fail to generate a
1994 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1997 o Major bugfixes (stats, onion services, backport from 0.4.4.5):
1998 - Fix a bug where we were undercounting the Tor network's total
1999 onion service traffic, by ignoring any traffic originating from
2000 clients. Now we count traffic from both clients and services.
2001 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
2003 o Major feature (exit, backport from 0.4.5.5-rc):
2004 - Re-entry into the network is now denied at the Exit level to all
2005 relays' ORPorts and authorities' ORPorts and DirPorts. This change
2006 should help mitigate a set of denial-of-service attacks. Closes
2009 o Minor feature (build system, backport from 0.4.5.4-rc):
2010 - New "make lsp" command to generate the compile_commands.json file
2011 used by the ccls language server. The "bear" program is needed for
2012 this. Closes ticket 40227.
2014 o Minor features (compilation, backport from 0.4.5.2-rc):
2015 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
2016 later. There are a number of APIs newly deprecated in OpenSSL
2017 3.0.0 that Tor still requires. (A later version of Tor will try to
2018 stop depending on these APIs.) Closes ticket 40165.
2020 o Minor features (crypto, backport from 0.4.5.3-rc):
2021 - Fix undefined behavior on our Keccak library. The bug only
2022 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
2023 and would result in wrong digests. Fixes bug 40210; bugfix on
2024 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
2025 weasel for diagnosing this.
2027 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
2028 - Strip '\r' characters when reading text files on Unix platforms.
2029 This should resolve an issue where a relay operator migrates a
2030 relay from Windows to Unix, but does not change the line ending of
2031 Tor's various state files to match the platform, and the CRLF line
2032 endings from Windows end up leaking into other files such as the
2033 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
2035 o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
2036 - Resolve a compilation warning that could occur in
2037 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
2039 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
2040 - Fix a compilation warning about unreachable fallthrough
2041 annotations when building with "--enable-all-bugs-are-fatal" on
2042 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
2044 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
2045 - Handle partial SOCKS5 messages correctly. Previously, our code
2046 would send an incorrect error message if it got a SOCKS5 request
2047 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
2049 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
2050 - Fix our Python reference-implementation for the v3 onion service
2051 handshake so that it works correctly with the version of hashlib
2052 provided by Python 3.9. Fixes part of bug 40179; bugfix
2054 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
2055 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
2058 Changes in version 0.4.5.5-rc - 2021-02-01
2059 Tor 0.4.5.5-rc is the third release candidate in its series. We're
2060 coming closer and closer to a stable release series. This release
2061 fixes an annoyance with address detection code, and somewhat mitigates
2062 an ongoing denial-of-service attack.
2064 We anticipate no more code changes between this and the stable
2065 release, though of course that could change.
2067 o Major feature (exit):
2068 - Re-entry into the network is now denied at the Exit level to all
2069 relays' ORPorts and authorities' ORPorts and DirPorts. This change
2070 should help mitgate a set of denial-of-service attacks. Closes
2073 o Minor bugfixes (relay, configuration):
2074 - Don't attempt to discover our address (IPv4 or IPv6) if no ORPort
2075 for it can be found in the configuration. Fixes bug 40254; bugfix
2079 Changes in version 0.4.5.4-rc - 2021-01-22
2080 Tor 0.4.5.4-rc is the second release candidate in its series. It fixes
2081 several bugs present in previous releases.
2083 We expect that the stable release will be the same, or almost the
2084 same, as this release candidate, unless serious bugs are found.
2086 o Major bugfixes (authority, IPv6):
2087 - Do not consider multiple relays in the same IPv6 /64 network to be
2088 sybils. Fixes bug 40243; bugfix on 0.4.5.1-alpha.
2090 o Major bugfixes (directory cache, performance, windows):
2091 - Limit the number of items in the consensus diff cache to 64 on
2092 Windows. We hope this will mitigate an issue where Windows relay
2093 operators reported Tor using 100% CPU, while we investigate better
2094 solutions. Fixes bug 24857; bugfix on 0.3.1.1-alpha.
2096 o Minor feature (build system):
2097 - New "make lsp" command to generate the compile_commands.json file
2098 used by the ccls language server. The "bear" program is needed for
2099 this. Closes ticket 40227.
2101 o Minor features (authority, logging):
2102 - Log more information for directory authority operators during the
2103 consensus voting process, and while processing relay descriptors.
2104 Closes ticket 40245.
2105 - Reject obsolete router/extrainfo descriptors earlier and more
2106 quietly, to avoid spamming the logs. Fixes bug 40238; bugfix
2109 o Minor bugfixes (compilation):
2110 - Fix another warning about unreachable fallthrough annotations when
2111 building with "--enable-all-bugs-are-fatal" on some compilers.
2112 Fixes bug 40241; bugfix on 0.4.5.3-rc.
2113 - Change the linker flag ordering in our library search code so that
2114 it works for compilers that need the libraries to be listed in the
2115 right order. Fixes bug 33624; bugfix on 0.1.1.0-alpha.
2117 o Minor bugfixes (config, bridge):
2118 - Don't initiate a connection to a bridge configured to use a
2119 missing transport. This change reverts an earlier fix that would
2120 try to avoid such situations during configuration chcecking, but
2121 which doesn't work with DisableNetwork. Fixes bug 40106; bugfix
2124 o Minor bugfixes (onion services):
2125 - Avoid a non-fatal assertion in certain edge-cases when
2126 establishing a circuit to an onion service. Fixes bug 32666;
2127 bugfix on 0.3.0.3-alpha.
2129 o Minor bugfixes (relay):
2130 - If we were unable to build our descriptor, don't mark it as having
2131 been advertised. Also remove an harmless BUG(). Fixes bug 40231;
2132 bugfix on 0.4.5.1-alpha.
2135 Changes in version 0.4.5.3-rc - 2021-01-12
2136 Tor 0.4.5.3-rc is the first release candidate in its series. It fixes
2137 several bugs, including one that broke onion services on certain older
2138 ARM CPUs, and another that made v3 onion services less reliable.
2140 Though we anticipate that we'll be doing a bit more clean-up between
2141 now and the stable release, we expect that our remaining changes will
2142 be fairly simple. There will be at least one more release candidate
2143 before 0.4.5.x is stable.
2145 o Major bugfixes (onion service v3):
2146 - Stop requiring a live consensus for v3 clients and services, and
2147 allow a "reasonably live" consensus instead. This allows v3 onion
2148 services to work even if the authorities fail to generate a
2149 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
2152 o Minor features (crypto):
2153 - Fix undefined behavior on our Keccak library. The bug only
2154 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
2155 and would result in wrong digests. Fixes bug 40210; bugfix on
2156 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
2157 weasel for diagnosing this.
2159 o Minor features (documentation):
2160 - Mention the "!badexit" directive that can appear in an authority's
2161 approved-routers file, and update the description of the
2162 "!invalid" directive. Closes ticket 40188.
2164 o Minor bugfixes (compilation):
2165 - Fix a compilation warning about unreachable fallthrough
2166 annotations when building with "--enable-all-bugs-are-fatal" on
2167 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
2168 - Fix the "--enable-static-tor" switch to properly set the "-static"
2169 compile option onto the tor binary only. Fixes bug 40111; bugfix
2172 o Minor bugfixes (config, bridge):
2173 - Really fix the case where torrc has a missing ClientTransportPlugin
2174 but is configured with a Bridge line and UseBridges. Previously,
2175 we didn't look at the managed proxy list and thus would fail for
2176 the "exec" case. Fixes bug 40106; bugfix on 0.4.5.1-alpha.
2178 o Minor bugfixes (logging, relay):
2179 - Log our address as reported by the directory authorities, if none
2180 was configured or detected before. Fixes bug 40201; bugfix
2182 - When a launching bandwidth testing circuit, don't incorrectly call
2183 it a reachability test, or trigger a "CHECKING_REACHABILITY"
2184 control event. Fixes bug 40205; bugfix on 0.4.5.1-alpha.
2186 o Minor bugfixes (relay, statistics):
2187 - Report the correct connection statistics in our extrainfo
2188 documents. Previously there was a problem in the file loading
2189 function which would wrongly truncate a state file, causing the
2190 wrong information to be reported. Fixes bug 40226; bugfix
2193 o Minor bugfixes (SOCKS5):
2194 - Handle partial SOCKS5 messages correctly. Previously, our code
2195 would send an incorrect error message if it got a SOCKS5 request
2196 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
2199 Changes in version 0.4.5.2-alpha - 2020-11-23
2200 Tor 0.4.5.2-alpha is the second alpha release in the 0.4.5.x series.
2201 It fixes several bugs present in earlier releases, including one that
2202 made it impractical to run relays on Windows. It also adds a few small
2203 safety features to improve Tor's behavior in the presence of strange
2204 compile-time options, misbehaving proxies, and future versions
2207 o Major bugfixes (relay, windows):
2208 - Fix a bug in our implementation of condition variables on Windows.
2209 Previously, a relay on Windows would use 100% CPU after running
2210 for some time. Because of this change, Tor now require Windows
2211 Vista or later to build and run. Fixes bug 30187; bugfix on
2212 0.2.6.3-alpha. (This bug became more serious in 0.3.1.1-alpha with
2213 the introduction of consensus diffs.) Patch by Daniel Pinto.
2215 o Minor features (compilation):
2216 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
2217 later. There are a number of APIs newly deprecated in OpenSSL
2218 3.0.0 that Tor still requires. (A later version of Tor will try to
2219 stop depending on these APIs.) Closes ticket 40165.
2221 o Minor features (protocol, proxy support, defense in depth):
2222 - Respond more deliberately to misbehaving proxies that leave
2223 leftover data on their connections, so as to make Tor even less
2224 likely to allow the proxies to pass their data off as having come
2225 from a relay. Closes ticket 40017.
2227 o Minor features (safety):
2228 - Log a warning at startup if Tor is built with compile-time options
2229 that are likely to make it less stable or reliable. Closes
2232 o Minor bugfixes (circuit, handshake):
2233 - In the v3 handshaking code, use connection_or_change_state() to
2234 change the state. Previously, we changed the state directly, but
2235 this did not pass the state change to the pubsub or channel
2236 objects, potentially leading to bugs. Fixes bug 32880; bugfix on
2237 0.2.3.6-alpha. Patch by Neel Chauhan.
2239 o Minor bugfixes (compilation):
2240 - Use the correct 'ranlib' program when building libtor.a.
2241 Previously we used the default ranlib, which broke some kinds of
2242 cross-compilation. Fixes bug 40172; bugfix on 0.4.5.1-alpha.
2243 - Remove a duplicate typedef in metrics_store.c. Fixes bug 40177;
2244 bugfix on 0.4.5.1-alpha.
2245 - When USDT tracing is enabled, and STAP_PROBEV() is missing, don't
2246 attempt to build. Linux supports that macro but not the BSDs.
2247 Fixes bug 40174; bugfix on 0.4.5.1-alpha.
2249 o Minor bugfixes (configuration):
2250 - Exit Tor on a misconfiguration when the Bridge line is configured
2251 to use a transport but no corresponding ClientTransportPlugin can
2252 be found. Prior to this fix, Tor would attempt to connect to the
2253 bridge directly without using the transport, making it easier for
2254 adversaries to notice the bridge. Fixes bug 25528; bugfix
2256 - Fix an issue where an ORPort was compared with other kinds of
2257 ports, when it should have been only checked against other
2258 ORPorts. This bug would lead to "DirPort auto" getting ignored.
2259 Fixes bug 40195; bugfix on 0.4.5.1-alpha.
2260 - Fix a bug where a second non-ORPort with a variant family (ex:
2261 SocksPort [::1]:9050) would be ignored due to a configuration
2262 parsing error. Fixes bug 40183; bugfix on 0.4.5.1-alpha.
2264 o Minor bugfixes (crash, relay, signing key):
2265 - Avoid assertion failures when we run Tor from the command line
2266 with `--key-expiration sign`, but an ORPort is not set. Fixes bug
2267 40015; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
2269 o Minor bugfixes (logging):
2270 - Remove trailing whitespace from control event log messages. Fixes
2271 bug 32178; bugfix on 0.1.1.1-alpha. Based on a patch by
2273 - Turn warning-level log message about SENDME failure into a debug-
2274 level message. (This event can happen naturally, and is no reason
2275 for concern). Fixes bug 40142; bugfix on 0.4.1.1-alpha.
2277 o Minor bugfixes (relay, address discovery):
2278 - Don't trigger an IP change when no new valid IP can be found.
2279 Fixes bug 40071; bugfix on 0.4.5.1-alpha.
2280 - When attempting to discover our IP, use a simple test circuit,
2281 rather than a descriptor fetch: the same address information is
2282 present in NETINFO cells, and is better authenticated there. Fixes
2283 bug 40071; bugfix on 0.4.5.1-alpha.
2285 o Minor bugfixes (testing):
2286 - Fix the `config/parse_tcp_proxy_line` test so that it works
2287 correctly on systems where the DNS provider hijacks invalid
2288 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
2289 - Fix unit tests that used newly generated list of routers so that
2290 they check them with respect to the date when they were generated,
2291 not with respect to the current time. Fixes bug 40187; bugfix
2293 - Fix our Python reference-implementation for the v3 onion service
2294 handshake so that it works correctly with the version of hashlib
2295 provided by Python 3.9. Fixes part of bug 40179; bugfix
2297 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
2298 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
2300 o Removed features (controller):
2301 - Remove the "GETINFO network-status" controller command. It has
2302 been deprecated since 0.3.1.1-alpha. Closes ticket 22473.
2305 Changes in version 0.4.4.6 - 2020-11-12
2306 Tor 0.4.4.6 is the second stable release in the 0.4.4.x series. It
2307 backports fixes from later releases, including a fix for TROVE-2020-
2308 005, a security issue that could be used, under certain cases, by an
2309 adversary to observe traffic patterns on a limited number of circuits
2310 intended for a different relay.
2312 o Major bugfixes (security, backport from 0.4.5.1-alpha):
2313 - When completing a channel, relays now check more thoroughly to
2314 make sure that it matches any pending circuits before attaching
2315 those circuits. Previously, address correctness and Ed25519
2316 identities were not checked in this case, but only when extending
2317 circuits on an existing channel. Fixes bug 40080; bugfix on
2318 0.2.7.2-alpha. Resolves TROVE-2020-005.
2320 o Minor features (directory authorities, backport from 0.4.5.1-alpha):
2321 - Authorities now list a different set of protocols as required and
2322 recommended. These lists have been chosen so that only truly
2323 recommended and/or required protocols are included, and so that
2324 clients using 0.2.9 or later will continue to work (even though
2325 they are not supported), whereas only relays running 0.3.5 or
2326 later will meet the requirements. Closes ticket 40162.
2327 - Make it possible to specify multiple ConsensusParams torrc lines.
2328 Now directory authority operators can for example put the main
2329 ConsensusParams config in one torrc file and then add to it from a
2330 different torrc file. Closes ticket 40164.
2332 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
2333 - Tor no longer allows subprotocol versions larger than 63.
2334 Previously version numbers up to UINT32_MAX were allowed, which
2335 significantly complicated our code. Implements proposal 318;
2336 closes ticket 40133.
2338 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
2339 - Fix a rendezvous cache unit test that was triggering an underflow
2340 on the global rend cache allocation. Fixes bug 40125; bugfix
2342 - Fix another rendezvous cache unit test that was triggering an
2343 underflow on the global rend cache allocation. Fixes bug 40126;
2344 bugfix on 0.2.8.1-alpha.
2346 o Minor bugfixes (compilation, backport from 0.4.5.1-alpha):
2347 - Fix compiler warnings that would occur when building with
2348 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
2349 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
2350 - Resolve a compilation warning that could occur in
2351 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
2353 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
2354 - Remove a debug logging statement that uselessly spammed the logs.
2355 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2357 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
2358 - Avoid a fatal assert() when failing to create a listener
2359 connection for an address that was in use. Fixes bug 40073; bugfix
2362 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
2363 - For HSFETCH commands on v2 onion services addresses, check the
2364 length of bytes decoded, not the base32 length. Fixes bug 34400;
2365 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
2368 Changes in version 0.4.3.7 - 2020-11-12
2369 Tor 0.4.3.7 backports several bugfixes from later releases. It
2370 includes a fix for TROVE-2020-005, a security issue that could be
2371 used, under certain cases, by an adversary to observe traffic patterns
2372 on a limited number of circuits intended for a different relay.
2374 Please be aware that support for the 0.4.3.x series will end on 15
2375 February 2021. Please upgrade to 0.4.4.x or 0.4.5.x before then, or
2376 downgrade to 0.3.5.x, which will be supported until at least 1
2379 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
2380 - Replace the 148 fallback directories originally included in Tor
2381 0.4.1.4-rc (of which around 105 are still functional) with a list
2382 of 144 fallbacks generated in July 2020. Closes ticket 40061.
2384 o Major bugfixes (security, backport from 0.4.5.1-alpha):
2385 - When completing a channel, relays now check more thoroughly to
2386 make sure that it matches any pending circuits before attaching
2387 those circuits. Previously, address correctness and Ed25519
2388 identities were not checked in this case, but only when extending
2389 circuits on an existing channel. Fixes bug 40080; bugfix on
2390 0.2.7.2-alpha. Resolves TROVE-2020-005.
2392 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
2393 - When running with NSS enabled, make sure that NSS knows to expect
2394 nonblocking sockets. Previously, we set our TCP sockets as
2395 nonblocking, but did not tell NSS, which in turn could lead to
2396 unexpected blocking behavior. Fixes bug 40035; bugfix
2399 o Minor features (security, backport from 0.4.4.4-rc):
2400 - Channels using obsolete versions of the Tor link protocol are no
2401 longer allowed to circumvent address-canonicity checks. (This is
2402 only a minor issue, since such channels have no way to set ed25519
2403 keys, and therefore should always be rejected for circuits that
2404 specify ed25519 identities.) Closes ticket 40081.
2406 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
2407 - Tor no longer allows subprotocol versions larger than 63.
2408 Previously version numbers up to UINT32_MAX were allowed, which
2409 significantly complicated our code. Implements proposal 318;
2410 closes ticket 40133.
2412 o Minor features (tests, backport from 0.4.4.5):
2413 - Our "make check" target now runs the unit tests in 8 parallel
2414 chunks. Doing this speeds up hardened CI builds by more than a
2415 factor of two. Closes ticket 40098.
2417 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
2418 - Fix a rendezvous cache unit test that was triggering an underflow
2419 on the global rend cache allocation. Fixes bug 40125; bugfix
2421 - Fix another rendezvous cache unit test that was triggering an
2422 underflow on the global rend cache allocation. Fixes bug 40126;
2423 bugfix on 0.2.8.1-alpha.
2425 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
2426 - Fix a correctness bug that could cause an assertion failure if we
2427 ever tried using the buf_move_all() function with an empty input
2428 buffer. As far as we know, no released versions of Tor do this.
2429 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
2431 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
2432 - Remove a debug logging statement that uselessly spammed the logs.
2433 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2435 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
2436 - On a bridge, treat all connections from an ExtORPort as remote by
2437 default for the purposes of rate-limiting. Previously, bridges
2438 would treat the connection as local unless they explicitly
2439 received a "USERADDR" command. ExtORPort connections still count
2440 as local if there is a USERADDR command with an explicit local
2441 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
2443 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
2444 - Avoid a fatal assert() when failing to create a listener
2445 connection for an address that was in use. Fixes bug 40073; bugfix
2448 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
2449 - Adjust the rules for when to warn about having too many
2450 connections to other relays. Previously we'd tolerate up to 1.5
2451 connections per relay on average. Now we tolerate more connections
2452 for directory authorities, and raise the number of total
2453 connections we need to see before we warn. Fixes bug 33880; bugfix
2456 o Minor bugfixes (tests, 0.4.4.5):
2457 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
2458 on its own. Previously, it would exit with an error. Fixes bug
2459 40099; bugfix on 0.2.8.1-alpha.
2461 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
2462 - For HSFETCH commands on v2 onion services addresses, check the
2463 length of bytes decoded, not the base32 length. Fixes bug 34400;
2464 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
2466 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
2467 - Fix a bug that prevented Tor from starting if its log file grew
2468 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
2470 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
2471 - Add a deprecation warning for version 2 onion services. Closes
2474 o Removed features (backport from 0.4.4.3-alpha):
2475 - Our "check-local" test target no longer tries to use the
2476 Coccinelle semantic patching tool parse all the C files. While it
2477 is a good idea to try to make sure Coccinelle works on our C
2478 before we run a Coccinelle patch, doing so on every test run has
2479 proven to be disruptive. You can still run this tool manually with
2480 "make check-cocci". Closes ticket 40030. ticket 40030.
2483 Changes in version 0.3.5.12 - 2020-11-12
2484 Tor 0.4.3.7 backports several bugfixes from later releases. It
2485 includes a fix for TROVE-2020-005, a security issue that could be
2486 used, under certain cases, by an adversary to observe traffic patterns
2487 on a limited number of circuits intended for a different relay.
2489 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
2490 - Replace the 148 fallback directories originally included in Tor
2491 0.4.1.4-rc (of which around 105 are still functional) with a list
2492 of 144 fallbacks generated in July 2020. Closes ticket 40061.
2494 o Major bugfixes (security, backport from 0.4.5.1-alpha):
2495 - When completing a channel, relays now check more thoroughly to
2496 make sure that it matches any pending circuits before attaching
2497 those circuits. Previously, address correctness and Ed25519
2498 identities were not checked in this case, but only when extending
2499 circuits on an existing channel. Fixes bug 40080; bugfix on
2500 0.2.7.2-alpha. Resolves TROVE-2020-005.
2502 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
2503 - When running with NSS enabled, make sure that NSS knows to expect
2504 nonblocking sockets. Previously, we set our TCP sockets as
2505 nonblocking, but did not tell NSS, which in turn could lead to
2506 unexpected blocking behavior. Fixes bug 40035; bugfix
2509 o Minor features (security, backport from 0.4.4.4-rc):
2510 - Channels using obsolete versions of the Tor link protocol are no
2511 longer allowed to circumvent address-canonicity checks. (This is
2512 only a minor issue, since such channels have no way to set ed25519
2513 keys, and therefore should always be rejected for circuits that
2514 specify ed25519 identities.) Closes ticket 40081.
2516 o Minor features (debugging, directory system):
2517 - Don't crash when we find a non-guard with a guard-fraction value
2518 set. Instead, log a bug warning, in an attempt to figure out how
2519 this happened. Diagnostic for ticket 32868.
2521 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
2522 - Tor no longer allows subprotocol versions larger than 63.
2523 Previously version numbers up to UINT32_MAX were allowed, which
2524 significantly complicated our code. Implements proposal 318;
2525 closes ticket 40133.
2527 o Minor features (tests, backport from 0.4.4.5):
2528 - Our "make check" target now runs the unit tests in 8 parallel
2529 chunks. Doing this speeds up hardened CI builds by more than a
2530 factor of two. Closes ticket 40098.
2532 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
2533 - Fix a rendezvous cache unit test that was triggering an underflow
2534 on the global rend cache allocation. Fixes bug 40125; bugfix
2536 - Fix another rendezvous cache unit test that was triggering an
2537 underflow on the global rend cache allocation. Fixes bug 40126;
2538 bugfix on 0.2.8.1-alpha.
2540 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
2541 - Fix a correctness bug that could cause an assertion failure if we
2542 ever tried using the buf_move_all() function with an empty input
2543 buffer. As far as we know, no released versions of Tor do this.
2544 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
2546 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
2547 - Remove a debug logging statement that uselessly spammed the logs.
2548 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2550 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
2551 - On a bridge, treat all connections from an ExtORPort as remote by
2552 default for the purposes of rate-limiting. Previously, bridges
2553 would treat the connection as local unless they explicitly
2554 received a "USERADDR" command. ExtORPort connections still count
2555 as local if there is a USERADDR command with an explicit local
2556 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
2558 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
2559 - Avoid a fatal assert() when failing to create a listener
2560 connection for an address that was in use. Fixes bug 40073; bugfix
2563 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
2564 - Adjust the rules for when to warn about having too many
2565 connections to other relays. Previously we'd tolerate up to 1.5
2566 connections per relay on average. Now we tolerate more connections
2567 for directory authorities, and raise the number of total
2568 connections we need to see before we warn. Fixes bug 33880; bugfix
2571 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
2572 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
2573 descriptors, when the IPv6 port was configured as "auto". Fixes
2574 bug 32588; bugfix on 0.2.3.9-alpha.
2576 o Minor bugfixes (tests, 0.4.4.5):
2577 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
2578 on its own. Previously, it would exit with an error. Fixes bug
2579 40099; bugfix on 0.2.8.1-alpha.
2581 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
2582 - Fix a bug that prevented Tor from starting if its log file grew
2583 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
2585 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
2586 - Add a deprecation warning for version 2 onion services. Closes
2590 Changes in version 0.4.5.1-alpha - 2020-11-01
2591 Tor 0.4.5.1-alpha is the first alpha release in the 0.4.5.x series. It
2592 improves support for IPv6, address discovery and self-testing, code
2593 metrics and tracing.
2595 This release also fixes TROVE-2020-005, a security issue that could be
2596 used, under certain cases, by an adversary to observe traffic patterns
2597 on a limited number of circuits intended for a different relay. To
2598 mount this attack, the adversary would need to actively extend
2599 circuits to an incorrect address, as well as compromise a relay's
2600 legacy RSA-1024 key. We'll be backporting this fix to other release
2601 series soon, after it has had some testing.
2603 Here are the changes since 0.4.4.5.
2605 o Major features (build):
2606 - When building Tor, first link all object files into a single
2607 static library. This may help with embedding Tor in other
2608 programs. Note that most Tor functions do not constitute a part of
2609 a stable or supported API: only those functions in tor_api.h
2610 should be used if embedding Tor. Closes ticket 40127.
2612 o Major features (metrics):
2613 - Introduce a new MetricsPort which exposes, through an HTTP
2614 interface, a series of metrics that tor collects at runtime. At
2615 the moment, the only supported output format is Prometheus data
2616 model. Closes ticket 40063. See the manual page for more
2617 information and security considerations.
2618 o Major features (relay, IPv6):
2619 - The torrc option Address now supports IPv6. This unifies our
2620 address discovery interface to support IPv4, IPv6, and hostnames.
2621 Closes ticket 33233.
2622 - Launch IPv4 and IPv6 ORPort self-test circuits on relays and
2623 bridges. Closes ticket 33222.
2624 - Relays now automatically bind on IPv6 for their ORPort, unless
2625 specified otherwise with the IPv4Only flag. Closes ticket 33246.
2626 - When a relay with IPv6 support is told to open a connection to
2627 another relay, and the extend cell lists both IPv4 and IPv6
2628 addresses, the first relay now picks randomly which address to
2629 use. Closes ticket 33220.
2630 - Relays now track their IPv6 ORPort reachability separately from
2631 the reachability of their IPv4 ORPort. They will not publish a
2632 descriptor unless _both_ ports appear to be externally reachable.
2633 Closes ticket 34067.
2635 o Major features (tracing):
2636 - Add event-tracing library support for USDT and LTTng-UST, and a
2637 few tracepoints in the circuit subsystem. More will come
2638 incrementally. This feature is compiled out by default: it needs
2639 to be enabled at configure time. See documentation in
2640 doc/HACKING/Tracing.md. Closes ticket 32910.
2642 o Major bugfixes (security):
2643 - When completing a channel, relays now check more thoroughly to
2644 make sure that it matches any pending circuits before attaching
2645 those circuits. Previously, address correctness and Ed25519
2646 identities were not checked in this case, but only when extending
2647 circuits on an existing channel. Fixes bug 40080; bugfix on
2648 0.2.7.2-alpha. Resolves TROVE-2020-005.
2650 o Major bugfixes (TLS, buffer):
2651 - When attempting to read N bytes on a TLS connection, really try to
2652 read all N bytes. Previously, Tor would stop reading after the
2653 first TLS record, which can be smaller than the N bytes requested,
2654 and not check for more data until the next mainloop event. Fixes
2655 bug 40006; bugfix on 0.1.0.5-rc.
2657 o Minor features (address discovery):
2658 - If no Address statements are found, relays now prioritize guessing
2659 their address by looking at the local interface instead of the
2660 local hostname. If the interface address can't be found, the local
2661 hostname is used. Closes ticket 33238.
2663 o Minor features (admin tools):
2664 - Add a new --format argument to -key-expiration option to allow
2665 specifying the time format of the expiration date. Adds Unix
2666 timestamp format support. Patch by Daniel Pinto. Closes
2669 o Minor features (bootstrap reporting):
2670 - When reporting bootstrapping status on a relay, do not consider
2671 connections that have never been the target of an origin circuit.
2672 Previously, all connection failures were treated as potential
2673 bootstrapping failures, including connections that had been opened
2674 because of client requests. Closes ticket 25061.
2676 o Minor features (build):
2677 - When running the configure script, try to detect version
2678 mismatches between the OpenSSL headers and libraries, and suggest
2679 that the user should try "--with-openssl-dir". Closes 40138.
2680 - If the configure script has given any warnings, remind the user
2681 about them at the end of the script. Related to 40138.
2683 o Minor features (configuration):
2684 - Allow using wildcards (* and ?) with the %include option on
2685 configuration files. Closes ticket 25140. Patch by Daniel Pinto.
2686 - Allow the configuration options EntryNodes, ExcludeNodes,
2687 ExcludeExitNodes, ExitNodes, MiddleNodes, HSLayer2Nodes and
2688 HSLayer3Nodes to be specified multiple times. Closes ticket 28361.
2689 Patch by Daniel Pinto.
2691 o Minor features (control port):
2692 - Add a DROPTIMEOUTS command to drop circuit build timeout history
2693 and reset the current timeout. Closes ticket 40002.
2694 - When a stream enters the AP_CONN_STATE_CONTROLLER_WAIT status,
2695 send a control port event. Closes ticket 32190. Patch by
2697 - Introduce GETINFO "stats/ntor/{assigned/requested}" and
2698 "stats/tap/{assigned/requested}" to get the NTor and TAP circuit
2699 onion handshake counts respectively. Closes ticket 28279. Patch by
2702 o Minor features (control port, IPv6):
2703 - Tor relays now try to report to the controller when they are
2704 launching an IPv6 self-test. Closes ticket 34068.
2705 - Introduce "GETINFO address/v4" and "GETINFO address/v6" in the
2706 control port to fetch the Tor host's respective IPv4 or IPv6
2707 address. We keep "GETINFO address" for backwards-compatibility.
2708 Closes ticket 40039. Patch by Neel Chauhan.
2710 o Minor features (directory authorities):
2711 - Authorities now list a different set of protocols as required and
2712 recommended. These lists have been chosen so that only truly
2713 recommended and/or required protocols are included, and so that
2714 clients using 0.2.9 or later will continue to work (even though
2715 they are not supported), whereas only relays running 0.3.5 or
2716 later will meet the requirements. Closes ticket 40162.
2717 - Add a new consensus method 30 that removes the unnecessary "="
2718 padding from ntor-onion-key. Closes ticket 7869. Patch by
2720 - Directory authorities now reject descriptors from relays running
2721 Tor versions from the obsolete 0.4.1 series. Resolves ticket
2722 34357. Patch by Neel Chauhan.
2723 - Make it possible to specify multiple ConsensusParams torrc lines.
2724 Now directory authority operators can for example put the main
2725 ConsensusParams config in one torrc file and then add to it from a
2726 different torrc file. Closes ticket 40164.
2727 - The AssumeReachable option no longer stops directory authorities
2728 from checking whether other relays are running. A new
2729 AuthDirTestReachability option can be used to disable these
2730 checks. Closes ticket 34445.
2731 - When looking for possible Sybil attacks, also consider IPv6
2732 addresses. Two routers are considered to have "the same" address
2733 by this metric if they are in the same /64 network. Patch from
2734 Maurice Pibouin. Closes ticket 7193.
2736 o Minor features (directory authorities, IPv6):
2737 - Make authorities add their IPv6 ORPort (if any) to the trusted
2738 servers list. Authorities previously added only their IPv4
2739 addresses. Closes ticket 32822.
2741 o Minor features (ed25519, relay):
2742 - Save a relay's base64-encoded ed25519 identity key to the data
2743 directory in a file named fingerprint-ed25519. Closes ticket
2744 30642. Patch by Neel Chauhan.
2746 o Minor features (heartbeat):
2747 - Include the total number of inbound and outbound IPv4 and IPv6
2748 connections in the heartbeat message. Closes ticket 29113.
2750 o Minor features (IPv6, ExcludeNodes):
2751 - Handle IPv6 addresses in ExcludeNodes; previously they were
2752 ignored. Closes ticket 34065. Patch by Neel Chauhan.
2754 o Minor features (logging):
2755 - Add the running glibc version to the log, and the compiled glibc
2756 version to the library list returned when using --library-versions.
2757 Patch from Daniel Pinto. Closes ticket 40047.
2758 - Consider an HTTP 301 response to be an error (like a 404) when
2759 processing a directory response. Closes ticket 40053.
2760 - Log directory fetch statistics as a single line. Closes
2762 - Provide more complete descriptions of our connections when logging
2763 about them. Closes ticket 40041.
2764 - When describing a relay in the logs, we now include its ed25519
2765 identity. Closes ticket 22668.
2767 o Minor features (onion services):
2768 - Only overwrite an onion service's existing hostname file if its
2769 contents are wrong. This enables read-only onion-service
2770 directories. Resolves ticket 40062. Patch by Neel Chauhan.
2772 o Minor features (pluggable transports):
2773 - Add an OutboundBindAddressPT option to allow users to specify
2774 which IPv4 and IPv6 address pluggable transports should use for
2775 outgoing IP packets. Tor does not have a way to enforce that the
2776 pluggable transport honors this option, so each pluggable transport
2777 needs to implement support on its own. Closes ticket 5304.
2779 o Minor features (relay address tracking):
2780 - We now store relay addresses for OR connections in a more logical
2781 way. Previously we would sometimes overwrite the actual address of
2782 a connection with a "canonical address", and then store the "real
2783 address" elsewhere to remember it. We now track the "canonical
2784 address" elsewhere for the cases where we need it, and leave the
2785 connection's address alone. Closes ticket 33898.
2787 o Minor features (relay):
2788 - If a relay is unable to discover its address, attempt to learn it
2789 from the NETINFO cell. Closes ticket 40022.
2790 - Log immediately when launching a relay self-check. Previously we
2791 would try to log before launching checks, or approximately when we
2792 intended to launch checks, but this tended to be error-prone.
2793 Closes ticket 34137.
2795 o Minor features (relay, address discovery):
2796 - If Address option is not found in torrc, attempt to learn our
2797 address with the configured ORPort address if any. Closes
2800 o Minor features (relay, IPv6):
2801 - Add an AssumeReachableIPv6 option to disable self-checking IPv6
2802 reachability. Closes part of ticket 33224.
2803 - Add new "assume-reachable" and "assume-reachable-ipv6" consensus
2804 parameters to be used in an emergency to tell relays that they
2805 should publish even if they cannot complete their ORPort self-
2806 checks. Closes ticket 34064 and part of 33224.
2807 - Allow relays to send IPv6-only extend cells. Closes ticket 33222.
2808 - Declare support for the Relay=3 subprotocol version. Closes
2810 - When launching IPv6 ORPort self-test circuits, make sure that the
2811 second-last hop can initiate an IPv6 extend. Closes ticket 33222.
2813 o Minor features (specification update):
2814 - Several fields in microdescriptors, router descriptors, and
2815 consensus documents that were formerly optional are now required.
2816 Implements proposal 315; closes ticket 40132.
2818 o Minor features (state management):
2819 - When loading the state file, remove entries from the statefile
2820 that have been obsolete for a long time. Ordinarily Tor preserves
2821 unrecognized entries in order to keep forward-compatibility, but
2822 these entries have not actually been used in any release since
2823 before 0.3.5.x. Closes ticket 40137.
2825 o Minor features (statistics, ipv6):
2826 - Relays now publish IPv6-specific counts of single-direction versus
2827 bidirectional relay connections. Closes ticket 33264.
2828 - Relays now publish their IPv6 read and write statistics over time,
2829 if statistics are enabled. Closes ticket 33263.
2831 o Minor features (subprotocol versions):
2832 - Tor no longer allows subprotocol versions larger than 63.
2833 Previously version numbers up to UINT32_MAX were allowed, which
2834 significantly complicated our code. Implements proposal 318;
2835 closes ticket 40133.
2836 - Use the new limitations on subprotocol versions due to proposal
2837 318 to simplify our implementation. Part of ticket 40133.
2839 o Minor features (testing configuration):
2840 - The TestingTorNetwork option no longer implicitly sets
2841 AssumeReachable to 1. This change allows us to test relays' self-
2842 testing mechanisms, and to test authorities' relay-testing
2843 functionality. Closes ticket 34446.
2845 o Minor features (testing):
2846 - Added unit tests for channel_matches_target_addr_for_extend().
2847 Closes Ticket 33919. Patch by MrSquanchee.
2849 o Minor features (tests, v2 onion services):
2850 - Fix a rendezvous cache unit test that was triggering an underflow
2851 on the global rend cache allocation. Fixes bug 40125; bugfix
2853 - Fix another rendezvous cache unit test that was triggering an
2854 underflow on the global rend cache allocation. Fixes bug 40126;
2855 bugfix on 0.2.8.1-alpha.
2857 o Minor bugfixes (circuit padding):
2858 - When circpad_send_padding_cell_for_callback is called,
2859 `is_padding_timer_scheduled` flag was not reset. Now it is set to
2860 0 at the top of that function. Fixes bug 32671; bugfix
2862 - Add a per-circuit padding machine instance counter, so we can
2863 differentiate between shutdown requests for old machines on a
2864 circuit. Fixes bug 30992; bugfix on 0.4.1.1-alpha.
2865 - Add the ability to keep circuit padding machines if they match a
2866 set of circuit states or purposes. This allows us to have machines
2867 that start up under some conditions but don't shut down under
2868 others. We now use this mask to avoid starting up introduction
2869 circuit padding again after the machines have already completed.
2870 Fixes bug 32040; bugfix on 0.4.1.1-alpha.
2872 o Minor bugfixes (compatibility):
2873 - Strip '\r' characters when reading text files on Unix platforms.
2874 This should resolve an issue where a relay operator migrates a
2875 relay from Windows to Unix, but does not change the line ending of
2876 Tor's various state files to match the platform, and the CRLF line
2877 endings from Windows end up leaking into other files such as the
2878 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
2880 o Minor bugfixes (compilation):
2881 - Fix compiler warnings that would occur when building with
2882 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
2883 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
2884 - Resolve a compilation warning that could occur in
2885 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
2887 o Minor bugfixes (configuration):
2888 - Fix bug where %including a pattern ending with */ would include
2889 files and folders (instead of folders only) in versions of glibc <
2890 2.19. Fixes bug 40141; bugfix on 0.4.5.0-alpha-dev. Patch by
2893 o Minor bugfixes (control port):
2894 - Make sure we send the SOCKS request address in relay begin cells
2895 when a stream is attached with the purpose
2896 CIRCUIT_PURPOSE_CONTROLLER. Fixes bug 33124; bugfix on 0.0.5.
2897 Patch by Neel Chauhan.
2899 o Minor bugfixes (logging):
2900 - Remove a debug logging statement that uselessly spammed the logs.
2901 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2902 - When logging a rate-limited message about how many messages have
2903 been suppressed in the last N seconds, give an accurate value for
2904 N, rounded up to the nearest minute. Previously we would report
2905 the size of the rate-limiting interval, regardless of when the
2906 messages started to occur. Fixes bug 19431; bugfix
2909 o Minor bugfixes (relay configuration, crash):
2910 - Avoid a fatal assert() when failing to create a listener
2911 connection for an address that was in use. Fixes bug 40073; bugfix
2914 o Minor bugfixes (rust, protocol versions):
2915 - Declare support for the onion service introduction point denial of
2916 service extensions when building with Rust. Fixes bug 34248;
2917 bugfix on 0.4.2.1-alpha.
2918 - Make Rust protocol version support checks consistent with the
2919 undocumented error behavior of the corresponding C code. Fixes bug
2920 34251; bugfix on 0.3.3.5-rc.
2922 o Minor bugfixes (self-testing):
2923 - When receiving an incoming circuit, only accept it as evidence
2924 that we are reachable if the declared address of its channel is
2925 the same address we think that we have. Otherwise, it could be
2926 evidence that we're reachable on some other address. Fixes bug
2927 20165; bugfix on 0.1.0.1-rc.
2929 o Minor bugfixes (spec conformance):
2930 - Use the correct key type when generating signing->link
2931 certificates. Fixes bug 40124; bugfix on 0.2.7.2-alpha.
2933 o Minor bugfixes (subprotocol versions):
2934 - Consistently reject extra commas, instead of only rejecting
2935 leading commas. Fixes bug 27194; bugfix on 0.2.9.4-alpha.
2936 - In summarize_protover_flags(), treat empty strings the same as
2937 NULL. This prevents protocols_known from being set. Previously, we
2938 treated empty strings as normal strings, which led to
2939 protocols_known being set. Fixes bug 34232; bugfix on
2940 0.3.3.2-alpha. Patch by Neel Chauhan.
2942 o Minor bugfixes (v2 onion services):
2943 - For HSFETCH commands on v2 onion services addresses, check the
2944 length of bytes decoded, not the base32 length. Fixes bug 34400;
2945 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
2947 o Code simplification and refactoring:
2948 - Add and use a set of functions to perform down-casts on constant
2949 connection and channel pointers. Closes ticket 40046.
2950 - Refactor our code that logs descriptions of connections, channels,
2951 and the peers on them, to use a single call path. This change
2952 enables us to refactor the data types that they use, and eliminates
2953 many confusing usages of those types. Closes ticket 40041.
2954 - Refactor some common node selection code into a single function.
2955 Closes ticket 34200.
2956 - Remove the now-redundant 'outbuf_flushlen' field from our
2957 connection type. It was previously used for an older version of
2958 our rate-limiting logic. Closes ticket 33097.
2959 - Rename "fascist_firewall_*" identifiers to "reachable_addr_*"
2960 instead, for consistency with other code. Closes ticket 18106.
2961 - Rename functions about "advertised" ports which are not in fact
2962 guaranteed to return the ports that have been advertised. Closes
2964 - Split implementation of several command line options from
2965 options_init_from_torrc into smaller isolated functions. Patch by
2966 Daniel Pinto. Closes ticket 40102.
2967 - When an extend cell is missing an IPv4 or IPv6 address, fill in
2968 the address from the extend info. This is similar to what was done
2969 in ticket 33633 for ed25519 keys. Closes ticket 33816. Patch by
2972 o Deprecated features:
2973 - The "non-builtin" argument to the "--dump-config" command is now
2974 deprecated. When it works, it behaves the same as "short", which
2975 you should use instead. Closes ticket 33398.
2978 - Replace URLs from our old bugtracker so that they refer to the new
2979 bugtracker and wiki. Closes ticket 40101.
2982 - We no longer ship or build a "tor.service" file for use with
2983 systemd. No distribution included this script unmodified, and we
2984 don't have the expertise ourselves to maintain this in a way that
2985 all the various systemd-based distributions can use. Closes
2987 - We no longer ship support for the Android logging API. Modern
2988 versions of Android can use the syslog API instead. Closes
2990 - The "optimistic data" feature is now always on; there is no longer
2991 an option to disable it from the torrc file or from the consensus
2992 directory. Closes part of 40139.
2993 - The "usecreatefast" network parameter is now removed; there is no
2994 longer an option for authorities to turn it off. Closes part
2998 - Add unit tests for bandwidth statistics manipulation functions.
2999 Closes ticket 33812. Patch by MrSquanchee.
3001 o Code simplification and refactoring (autoconf):
3002 - Remove autoconf checks for unused funcs and headers. Closes ticket
3003 31699; Patch by @bduszel
3005 o Code simplification and refactoring (maintainer scripts):
3006 - Disable by default the pre-commit hook. Use the environment
3007 variable TOR_EXTRA_PRE_COMMIT_CHECKS in order to run it.
3008 Furthermore, stop running practracker in the pre-commit hook and
3009 make check-local. Closes ticket 40019.
3011 o Code simplification and refactoring (relay address):
3012 - Most of IPv4 representation was using "uint32_t". It has now been
3013 moved to use the internal "tor_addr_t" interface instead. This is
3014 so we can properly integrate IPv6 along IPv4 with common
3015 interfaces. Closes ticket 40043.
3017 o Documentation (manual page):
3018 - Move them from doc/ to doc/man/. Closes ticket 40044.
3019 - Describe the status of the "Sandbox" option more accurately. It is
3020 no longer "experimental", but it _is_ dependent on kernel and libc
3021 versions. Closes ticket 23378.
3023 o Documentation (tracing):
3024 - Document in depth the circuit subsystem trace events in the new
3025 doc/tracing/EventsCircuit.md. Closes ticket 40036.
3028 Changes in version 0.4.4.5 - 2020-09-15
3029 Tor 0.4.4.5 is the first stable release in the 0.4.4.x series. This
3030 series improves our guard selection algorithms, adds v3 onion balance
3031 support, improves the amount of code that can be disabled when running
3032 without relay support, and includes numerous small bugfixes and
3033 enhancements. It also lays the ground for some IPv6 features that
3034 we'll be developing more in the next (0.4.5) series.
3036 Per our support policy, we support each stable release series for nine
3037 months after its first stable release, or three months after the first
3038 stable release of the next series: whichever is longer. This means
3039 that 0.4.4.x will be supported until around June 2021--or later, if
3040 0.4.5.x is later than anticipated.
3042 Note also that support for 0.4.2.x has just ended; support for 0.4.3
3043 will continue until Feb 15, 2021. We still plan to continue supporting
3044 0.3.5.x, our long-term stable series, until Feb 2022.
3046 Below are the changes since 0.4.4.4-rc. For a complete list of changes
3047 since 0.4.3.6, see the ReleaseNotes file.
3049 o Major bugfixes (onion services, DoS):
3050 - Correct handling of parameters for the onion service DoS defense.
3051 Previously, the consensus parameters for the onion service DoS
3052 defenses were overwriting the parameters set by the service
3053 operator using HiddenServiceEnableIntroDoSDefense. Fixes bug
3054 40109; bugfix on 0.4.2.1-alpha.
3056 o Major bugfixes (stats, onion services):
3057 - Fix a bug where we were undercounting the Tor network's total
3058 onion service traffic, by ignoring any traffic originating from
3059 clients. Now we count traffic from both clients and services.
3060 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
3062 o Minor features (control port):
3063 - If a ClientName was specified in ONION_CLIENT_AUTH_ADD for an
3064 onion service, display it when we use ONION_CLIENT_AUTH_VIEW.
3065 Closes ticket 40089. Patch by Neel Chauhan.
3067 o Minor features (denial-of-service memory limiter):
3068 - Allow the user to configure even lower values for the
3069 MaxMemInQueues parameter. Relays now enforce a minimum of 64 MB,
3070 when previously the minimum was 256 MB. On clients, there is no
3071 minimum. Relays and clients will both warn if the value is set so
3072 low that Tor is likely to stop working. Closes ticket 24308.
3074 o Minor features (tests):
3075 - Our "make check" target now runs the unit tests in 8 parallel
3076 chunks. Doing this speeds up hardened CI builds by more than a
3077 factor of two. Closes ticket 40098.
3079 o Minor bugfixes (guard selection algorithm):
3080 - Avoid needless guard-related warning when upgrading from 0.4.3 to
3081 0.4.4. Fixes bug 40105; bugfix on 0.4.4.1-alpha.
3083 o Minor bugfixes (tests):
3084 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
3085 on its own. Previously, it would exit with an error. Fixes bug
3086 40099; bugfix on 0.2.8.1-alpha.
3089 Changes in version 0.4.4.3-alpha - 2020-07-27
3090 Tor 0.4.4.3-alpha fixes several annoyances in previous versions,
3091 including one affecting NSS users, and several affecting the Linux
3094 o Major features (fallback directory list):
3095 - Replace the 148 fallback directories originally included in Tor
3096 0.4.1.4-rc (of which around 105 are still functional) with a list
3097 of 144 fallbacks generated in July 2020. Closes ticket 40061.
3099 o Major bugfixes (NSS):
3100 - When running with NSS enabled, make sure that NSS knows to expect
3101 nonblocking sockets. Previously, we set our TCP sockets as
3102 nonblocking, but did not tell NSS, which in turn could lead to
3103 unexpected blocking behavior. Fixes bug 40035; bugfix
3106 o Minor bugfixes (linux seccomp2 sandbox):
3107 - Fix a regression on sandboxing rules for the openat() syscall. The
3108 fix for bug 25440 fixed the problem on systems with glibc >= 2.27
3109 but broke with versions of glibc. We now choose a rule based on
3110 the glibc version. Patch from Daniel Pinto. Fixes bug 27315;
3112 - Makes the seccomp sandbox allow the correct syscall for opendir
3113 according to the running glibc version. This fixes crashes when
3114 reloading torrc with sandbox enabled when running on glibc 2.15 to
3115 2.21 and 2.26. Patch from Daniel Pinto. Fixes bug 40020; bugfix
3118 o Minor bugfixes (relay, usability):
3119 - Adjust the rules for when to warn about having too many
3120 connections to other relays. Previously we'd tolerate up to 1.5
3121 connections per relay on average. Now we tolerate more connections
3122 for directory authorities, and raise the number of total
3123 connections we need to see before we warn. Fixes bug 33880; bugfix
3127 - Replace most http:// URLs in our code and documentation with
3128 https:// URLs. (We have left unchanged the code in src/ext/, and
3129 the text in LICENSE.) Closes ticket 31812. Patch from Jeremy Rand.
3132 - Our "check-local" test target no longer tries to use the
3133 Coccinelle semantic patching tool parse all the C files. While it
3134 is a good idea to try to make sure Coccinelle works on our C
3135 before we run a Coccinelle patch, doing so on every test run has
3136 proven to be disruptive. You can still run this tool manually with
3137 "make check-cocci". Closes ticket 40030.
3140 Changes in version 0.3.5.11 - 2020-07-09
3141 Tor 0.3.5.11 backports fixes from later tor releases, including several
3142 usability, portability, and reliability fixes.
3144 This release also fixes TROVE-2020-001, a medium-severity denial of
3145 service vulnerability affecting all versions of Tor when compiled with
3146 the NSS encryption library. (This is not the default configuration.)
3147 Using this vulnerability, an attacker could cause an affected Tor
3148 instance to crash remotely. This issue is also tracked as CVE-2020-
3149 15572. Anybody running a version of Tor built with the NSS library
3150 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3153 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
3154 - Fix a crash due to an out-of-bound memory access when Tor is
3155 compiled with NSS support. Fixes bug 33119; bugfix on
3156 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3159 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
3160 - Fix a bug that was preventing DoS defenses from running on bridges
3161 with a pluggable transport. Previously, the DoS subsystem was not
3162 given the transport name of the client connection, thus failed to
3163 find the GeoIP cache entry for that client address. Fixes bug
3164 33491; bugfix on 0.3.3.2-alpha.
3166 o Minor features (testing, backport from 0.4.3.4-rc):
3167 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
3168 variable to specify a list of space-separated test cases that
3169 should not be executed. We will use this to disable certain tests
3170 that are failing on Appveyor because of mismatched OpenSSL
3171 libraries. Part of ticket 33643.
3173 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
3174 - Use the correct 64-bit printf format when compiling with MINGW on
3175 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3177 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
3178 - Warn if the ContactInfo field is not set, and tell the relay
3179 operator that not having a ContactInfo field set might cause their
3180 relay to get rejected in the future. Fixes bug 33361; bugfix
3183 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
3184 - Resume use of preemptively-built circuits when UseEntryGuards is set
3185 to 0. We accidentally disabled this feature with that config
3186 setting, leading to slower load times. Fixes bug 34303; bugfix
3189 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
3190 - Avoid compiler warnings from Clang 10 related to the use of GCC-
3191 style "/* falls through */" comments. Both Clang and GCC allow
3192 __attribute__((fallthrough)) instead, so that's what we're using
3193 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
3195 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
3196 - Fix a compiler warning on platforms with 32-bit time_t values.
3197 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3199 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
3200 - When starting Tor any time after the first time in a process,
3201 register the thread in which it is running as the main thread.
3202 Previously, we only did this on Windows, which could lead to bugs
3203 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
3206 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
3207 - When reading PEM-encoded key data, tolerate CRLF line-endings even
3208 if we are not running on Windows. Previously, non-Windows hosts
3209 would reject these line-endings in certain positions, making
3210 certain key files hard to move from one host to another. Fixes bug
3211 33032; bugfix on 0.3.5.1-alpha.
3213 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
3214 - Downgrade a noisy log message that could occur naturally when
3215 receiving an extrainfo document that we no longer want. Fixes bug
3216 16016; bugfix on 0.2.6.3-alpha.
3218 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
3219 - Remove a BUG() warning that would cause a stack trace if an onion
3220 service descriptor was freed while we were waiting for a
3221 rendezvous circuit to complete. Fixes bug 28992; bugfix
3224 o Testing (CI, backport from 0.4.3.4-rc):
3225 - In our Appveyor Windows CI, copy required DLLs to test and app
3226 directories, before running tor's tests. This ensures that tor.exe
3227 and test*.exe use the correct version of each DLL. This fix is not
3228 required, but we hope it will avoid DLL search issues in future.
3229 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
3230 - On Appveyor, skip the crypto/openssl_version test, which is
3231 failing because of a mismatched library installation. Fix
3235 Changes in version 0.4.2.8 - 2020-07-09
3236 Tor 0.4.2.8 backports various fixes from later releases, including
3237 several that affect usability and portability.
3239 This release also fixes TROVE-2020-001, a medium-severity denial of
3240 service vulnerability affecting all versions of Tor when compiled with
3241 the NSS encryption library. (This is not the default configuration.)
3242 Using this vulnerability, an attacker could cause an affected Tor
3243 instance to crash remotely. This issue is also tracked as CVE-2020-
3244 15572. Anybody running a version of Tor built with the NSS library
3245 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3248 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
3249 - Fix a crash due to an out-of-bound memory access when Tor is
3250 compiled with NSS support. Fixes bug 33119; bugfix on
3251 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3254 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
3255 - Fix a bug that was preventing DoS defenses from running on bridges
3256 with a pluggable transport. Previously, the DoS subsystem was not
3257 given the transport name of the client connection, thus failed to
3258 find the GeoIP cache entry for that client address. Fixes bug
3259 33491; bugfix on 0.3.3.2-alpha.
3261 o Minor feature (sendme, flow control, backport form 0.4.3.4-rc):
3262 - Default to sending SENDME version 1 cells. (Clients are already
3263 sending these, because of a consensus parameter telling them to do
3264 so: this change only affects what clients would do if the
3265 consensus didn't contain a recommendation.) Closes ticket 33623.
3267 o Minor features (diagnostic, backport from 0.4.3.3-alpha):
3268 - Improve assertions and add some memory-poisoning code to try to
3269 track down possible causes of a rare crash (32564) in the EWMA
3270 code. Closes ticket 33290.
3272 o Minor features (testing, backport from 0.4.3.4-rc):
3273 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
3274 variable to specify a list of space-separated test cases that
3275 should not be executed. We will use this to disable certain tests
3276 that are failing on Appveyor because of mismatched OpenSSL
3277 libraries. Part of ticket 33643.
3279 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
3280 - Use the correct 64-bit printf format when compiling with MINGW on
3281 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3283 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
3284 - Warn if the ContactInfo field is not set, and tell the relay
3285 operator that not having a ContactInfo field set might cause their
3286 relay to get rejected in the future. Fixes bug 33361; bugfix
3289 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
3290 - Resume use of preemptively-built circuits when UseEntryGuards is set
3291 to 0. We accidentally disabled this feature with that config
3292 setting, leading to slower load times. Fixes bug 34303; bugfix
3295 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
3296 - Avoid compiler warnings from Clang 10 related to the use of GCC-
3297 style "/* falls through */" comments. Both Clang and GCC allow
3298 __attribute__((fallthrough)) instead, so that's what we're using
3299 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
3300 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
3303 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
3304 - Fix a compiler warning on platforms with 32-bit time_t values.
3305 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3307 o Minor bugfixes (controller protocol, backport from 0.4.3.2-alpha):
3308 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
3309 report them as SIGNAL events. Previously we would log a bug
3310 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
3312 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
3313 - When starting Tor any time after the first time in a process,
3314 register the thread in which it is running as the main thread.
3315 Previously, we only did this on Windows, which could lead to bugs
3316 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
3319 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
3320 - When reading PEM-encoded key data, tolerate CRLF line-endings even
3321 if we are not running on Windows. Previously, non-Windows hosts
3322 would reject these line-endings in certain positions, making
3323 certain key files hard to move from one host to another. Fixes bug
3324 33032; bugfix on 0.3.5.1-alpha.
3326 o Minor bugfixes (logging, backport from 0.4.3.2-rc):
3327 - When logging a bug, do not say "Future instances of this warning
3328 will be silenced" unless we are actually going to silence them.
3329 Previously we would say this whenever a BUG() check failed in the
3330 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
3332 o Minor bugfixes (logging, backport from 0.4.3.4-rc):
3333 - Flush stderr, stdout, and file logs during shutdown, if supported
3334 by the OS. This change helps make sure that any final logs are
3335 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
3337 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
3338 - Downgrade a noisy log message that could occur naturally when
3339 receiving an extrainfo document that we no longer want. Fixes bug
3340 16016; bugfix on 0.2.6.3-alpha.
3342 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
3343 - Remove a BUG() warning that would cause a stack trace if an onion
3344 service descriptor was freed while we were waiting for a
3345 rendezvous circuit to complete. Fixes bug 28992; bugfix
3348 o Testing (CI, backport from 0.4.3.4-rc):
3349 - In our Appveyor Windows CI, copy required DLLs to test and app
3350 directories, before running tor's tests. This ensures that tor.exe
3351 and test*.exe use the correct version of each DLL. This fix is not
3352 required, but we hope it will avoid DLL search issues in future.
3353 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
3354 - On Appveyor, skip the crypto/openssl_version test, which is
3355 failing because of a mismatched library installation. Fix
3359 Changes in version 0.4.3.6 - 2020-07-09
3360 Tor 0.4.3.6 backports several bugfixes from later releases, including
3361 some affecting usability.
3363 This release also fixes TROVE-2020-001, a medium-severity denial of
3364 service vulnerability affecting all versions of Tor when compiled with
3365 the NSS encryption library. (This is not the default configuration.)
3366 Using this vulnerability, an attacker could cause an affected Tor
3367 instance to crash remotely. This issue is also tracked as CVE-2020-
3368 15572. Anybody running a version of Tor built with the NSS library
3369 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3372 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
3373 - Fix a crash due to an out-of-bound memory access when Tor is
3374 compiled with NSS support. Fixes bug 33119; bugfix on
3375 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3378 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
3379 - Use the correct 64-bit printf format when compiling with MINGW on
3380 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3382 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
3383 - Resume use of preemptively-built circuits when UseEntryGuards is set
3384 to 0. We accidentally disabled this feature with that config
3385 setting, leading to slower load times. Fixes bug 34303; bugfix
3388 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
3389 - Fix a compiler warning on platforms with 32-bit time_t values.
3390 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3392 o Minor bugfixes (linux seccomp sandbox, nss, backport from 0.4.4.1-alpha):
3393 - Fix a startup crash when tor is compiled with --enable-nss and
3394 sandbox support is enabled. Fixes bug 34130; bugfix on
3395 0.3.5.1-alpha. Patch by Daniel Pinto.
3397 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
3398 - Downgrade a noisy log message that could occur naturally when
3399 receiving an extrainfo document that we no longer want. Fixes bug
3400 16016; bugfix on 0.2.6.3-alpha.
3402 o Minor bugfixes (manual page, backport from 0.4.4.1-alpha):
3403 - Update the man page to reflect that MinUptimeHidServDirectoryV2
3404 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
3406 o Minor bugfixes (onion service v3, backport from 0.4.4.1-alpha):
3407 - Prevent an assert() that would occur when cleaning the client
3408 descriptor cache, and attempting to close circuits for a non-
3409 decrypted descriptor (lacking client authorization). Fixes bug
3410 33458; bugfix on 0.4.2.1-alpha.
3412 o Minor bugfixes (portability, backport from 0.4.4.1-alpha):
3413 - Fix a portability error in the configure script, where we were
3414 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
3416 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
3417 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
3418 descriptors, when the IPv6 port was configured as "auto". Fixes
3419 bug 32588; bugfix on 0.2.3.9-alpha.
3421 o Documentation (backport from 0.4.4.1-alpha):
3422 - Fix several doxygen warnings related to imbalanced groups. Closes
3426 Changes in version 0.4.4.2-alpha - 2020-07-09
3427 This is the second alpha release in the 0.4.4.x series. It fixes a few
3428 bugs in the previous release, and solves a few usability,
3429 compatibility, and portability issues.
3431 This release also fixes TROVE-2020-001, a medium-severity denial of
3432 service vulnerability affecting all versions of Tor when compiled with
3433 the NSS encryption library. (This is not the default configuration.)
3434 Using this vulnerability, an attacker could cause an affected Tor
3435 instance to crash remotely. This issue is also tracked as CVE-2020-
3436 15572. Anybody running a version of Tor built with the NSS library
3437 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3440 o Major bugfixes (NSS, security):
3441 - Fix a crash due to an out-of-bound memory access when Tor is
3442 compiled with NSS support. Fixes bug 33119; bugfix on
3443 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3446 o Minor features (bootstrap reporting):
3447 - Report more detailed reasons for bootstrap failure when the
3448 failure happens due to a TLS error. Previously we would just call
3449 these errors "MISC" when they happened during read, and "DONE"
3450 when they happened during any other TLS operation. Closes
3453 o Minor features (directory authority):
3454 - Authorities now recommend the protocol versions that are supported
3455 by Tor 0.3.5 and later. (Earlier versions of Tor have been
3456 deprecated since January of this year.) This recommendation will
3457 cause older clients and relays to give a warning on startup, or
3458 when they download a consensus directory. Closes ticket 32696.
3460 o Minor features (entry guards):
3461 - Reinstate support for GUARD NEW/UP/DOWN control port events.
3462 Closes ticket 40001.
3464 o Minor features (linux seccomp2 sandbox, portability):
3465 - Allow Tor to build on platforms where it doesn't know how to
3466 report which syscall caused the linux seccomp2 sandbox to fail.
3467 This change should make the sandbox code more portable to less
3468 common Linux architectures. Closes ticket 34382.
3469 - Permit the unlinkat() syscall, which some Libc implementations use
3470 to implement unlink(). Closes ticket 33346.
3472 o Minor bugfix (CI, Windows):
3473 - Use the correct 64-bit printf format when compiling with MINGW on
3474 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3476 o Minor bugfix (onion service v3 client):
3477 - Remove a BUG() warning that could occur naturally. Fixes bug
3478 34087; bugfix on 0.3.2.1-alpha.
3480 o Minor bugfix (SOCKS, onion service client):
3481 - Detect v3 onion service addresses of the wrong length when
3482 returning the F6 ExtendedErrors code. Fixes bug 33873; bugfix
3485 o Minor bugfixes (compiler warnings):
3486 - Fix a compiler warning on platforms with 32-bit time_t values.
3487 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3489 o Minor bugfixes (control port, onion service):
3490 - Consistently use 'address' in "Invalid v3 address" response to
3491 ONION_CLIENT_AUTH commands. Previously, we would sometimes say
3492 'addr'. Fixes bug 40005; bugfix on 0.4.3.1-alpha.
3494 o Minor bugfixes (logging):
3495 - Downgrade a noisy log message that could occur naturally when
3496 receiving an extrainfo document that we no longer want. Fixes bug
3497 16016; bugfix on 0.2.6.3-alpha.
3499 o Minor bugfixes (onion services v3):
3500 - Avoid a non-fatal assertion failure in certain edge-cases when
3501 opening an intro circuit as a client. Fixes bug 34084; bugfix
3504 o Deprecated features (onion service v2):
3505 - Add a deprecation warning for version 2 onion services. Closes
3508 o Removed features (IPv6, revert):
3509 - Revert the change in the default value of ClientPreferIPv6OrPort:
3510 it breaks the torsocks use case. The SOCKS resolve command has no
3511 mechanism to ask for a specific address family (v4 or v6), and so
3512 prioritizing IPv6 when an IPv4 address is requested on the SOCKS
3513 interface resulted in a failure. Tor Browser explicitly sets
3514 PreferIPv6, so this should not affect the majority of our users.
3515 Closes ticket 33796; bugfix on 0.4.4.1-alpha.
3518 Changes in version 0.4.4.1-alpha - 2020-06-16
3519 This is the first alpha release in the 0.4.4.x series. It improves
3520 our guard selection algorithms, improves the amount of code that
3521 can be disabled when running without relay support, and includes numerous
3522 small bugfixes and enhancements. It also lays the ground for some IPv6
3523 features that we'll be developing more in the next (0.4.5) series.
3525 Here are the changes since 0.4.3.5.
3527 o Major features (Proposal 310, performance + security):
3528 - Implements Proposal 310, "Bandaid on guard selection". Proposal
3529 310 solves load-balancing issues with older versions of the guard
3530 selection algorithm, and improves its security. Under this new
3531 algorithm, a newly selected guard never becomes Primary unless all
3532 previously sampled guards are unreachable. Implements
3533 recommendation from 32088. (Proposal 310 is linked to the CLAPS
3534 project researching optimal client location-aware path selections.
3535 This project is a collaboration between the UCLouvain Crypto Group,
3536 the U.S. Naval Research Laboratory, and Princeton University.)
3538 o Major features (IPv6, relay):
3539 - Consider IPv6-only EXTEND2 cells valid on relays. Log a protocol
3540 warning if the IPv4 or IPv6 address is an internal address, and
3541 internal addresses are not allowed. But continue to use the other
3542 address, if it is valid. Closes ticket 33817.
3543 - If a relay can extend over IPv4 and IPv6, and both addresses are
3544 provided, it chooses between them uniformly at random. Closes
3546 - Re-use existing IPv6 connections for circuit extends. Closes
3548 - Relays may extend circuits over IPv6, if the relay has an IPv6
3549 ORPort, and the client supplies the other relay's IPv6 ORPort in
3550 the EXTEND2 cell. IPv6 extends will be used by the relay IPv6
3551 ORPort self-tests in 33222. Closes ticket 33817.
3553 o Major features (v3 onion services):
3554 - Allow v3 onion services to act as OnionBalance backend instances,
3555 by using the HiddenServiceOnionBalanceInstance torrc option.
3556 Closes ticket 32709.
3558 o Minor feature (developer tools):
3559 - Add a script to help check the alphabetical ordering of option
3560 names in the manual page. Closes ticket 33339.
3562 o Minor feature (onion service client, SOCKS5):
3563 - Add 3 new SocksPort ExtendedErrors (F2, F3, F7) that reports back
3564 new type of onion service connection failures. The semantics of
3565 these error codes are documented in proposal 309. Closes
3568 o Minor feature (onion service v3):
3569 - If a service cannot upload its descriptor(s), log why at INFO
3570 level. Closes ticket 33400; bugfix on 0.3.2.1-alpha.
3572 o Minor feature (python scripts):
3573 - Stop assuming that /usr/bin/python exists. Instead of using a
3574 hardcoded path in scripts that still use Python 2, use
3575 /usr/bin/env, similarly to the scripts that use Python 3. Fixes
3576 bug 33192; bugfix on 0.4.2.
3578 o Minor features (client-only compilation):
3579 - Disable more code related to the ext_orport protocol when
3580 compiling without support for relay mode. Closes ticket 33368.
3581 - Disable more of our self-testing code when support for relay mode
3582 is disabled. Closes ticket 33370.
3584 o Minor features (code safety):
3585 - Check for failures of tor_inet_ntop() and tor_inet_ntoa()
3586 functions in DNS and IP address processing code, and adjust
3587 codepaths to make them less likely to crash entire Tor instances.
3588 Resolves issue 33788.
3590 o Minor features (compilation size):
3591 - Most server-side DNS code is now disabled when building without
3592 support for relay mode. Closes ticket 33366.
3594 o Minor features (continuous integration):
3595 - Run unit-test and integration test (Stem, Chutney) jobs with
3596 ALL_BUGS_ARE_FATAL macro being enabled on Travis and Appveyor.
3597 Resolves ticket 32143.
3599 o Minor features (control port):
3600 - Return a descriptive error message from the 'GETINFO status/fresh-
3601 relay-descs' command on the control port. Previously, we returned
3602 a generic error of "Error generating descriptor". Closes ticket
3603 32873. Patch by Neel Chauhan.
3605 o Minor features (developer tooling):
3606 - Refrain from listing all .a files that are generated by the Tor
3607 build in .gitignore. Add a single wildcard *.a entry that covers
3608 all of them for present and future. Closes ticket 33642.
3609 - Add a script ("git-install-tools.sh") to install git hooks and
3610 helper scripts. Closes ticket 33451.
3612 o Minor features (directory authority, shared random):
3613 - Refactor more authority-only parts of the shared-random scheduling
3614 code to reside in the dirauth module, and to be disabled when
3615 compiling with --disable-module-dirauth. Closes ticket 33436.
3617 o Minor features (directory):
3618 - Remember the number of bytes we have downloaded for each directory
3619 purpose while bootstrapping, and while fully bootstrapped. Log
3620 this information as part of the heartbeat message. Closes
3623 o Minor features (IPv6 support):
3624 - Adds IPv6 support to tor_addr_is_valid(). Adds tests for the above
3625 changes and tor_addr_is_null(). Closes ticket 33679. Patch
3627 - Allow clients and relays to send dual-stack and IPv6-only EXTEND2
3628 cells. Parse dual-stack and IPv6-only EXTEND2 cells on relays.
3629 Closes ticket 33901.
3631 o Minor features (logging):
3632 - When trying to find our own address, add debug-level logging to
3633 report the sources of candidate addresses. Closes ticket 32888.
3635 o Minor features (testing, architecture):
3636 - Our test scripts now double-check that subsystem initialization
3637 order is consistent with the inter-module dependencies established
3638 by our .may_include files. Implements ticket 31634.
3639 - Initialize all subsystems at the beginning of our unit test
3640 harness, to avoid crashes due to uninitialized subsystems. Follow-
3641 up from ticket 33316.
3643 o Minor features (v3 onion services):
3644 - Add v3 onion service status to the dumpstats() call which is
3645 triggered by a SIGUSR1 signal. Previously, we only did v2 onion
3646 services. Closes ticket 24844. Patch by Neel Chauhan.
3648 o Minor features (windows):
3649 - Add support for console control signals like Ctrl+C in Windows.
3650 Closes ticket 34211. Patch from Damon Harris (TheDcoder).
3652 o Minor bugfix (onion service v3):
3653 - Prevent an assert() that would occur when cleaning the client
3654 descriptor cache, and attempting to close circuits for a non-
3655 decrypted descriptor (lacking client authorization). Fixes bug
3656 33458; bugfix on 0.4.2.1-alpha.
3658 o Minor bugfix (refactoring):
3659 - Lift circuit_build_times_disabled() out of the
3660 circuit_expire_building() loop, to save CPU time when there are
3661 many circuits open. Fixes bug 33977; bugfix on 0.3.5.9.
3663 o Minor bugfixes (client performance):
3664 - Resume use of preemptively-built circuits when UseEntryGuards is set
3665 to 0. We accidentally disabled this feature with that config
3666 setting, leading to slower load times. Fixes bug 34303; bugfix
3669 o Minor bugfixes (directory authorities):
3670 - Directory authorities now reject votes that arrive too late. In
3671 particular, once an authority has started fetching missing votes,
3672 it no longer accepts new votes posted by other authorities. This
3673 change helps prevent a consensus split, where only some authorities
3674 have the late vote. Fixes bug 4631; bugfix on 0.2.0.5-alpha.
3676 o Minor bugfixes (git scripts):
3677 - Stop executing the checked-out pre-commit hook from the pre-push
3678 hook. Instead, execute the copy in the user's git directory. Fixes
3679 bug 33284; bugfix on 0.4.1.1-alpha.
3681 o Minor bugfixes (initialization):
3682 - Initialize the subsystems in our code in an order more closely
3683 corresponding to their dependencies, so that every system is
3684 initialized before the ones that (theoretically) depend on it.
3685 Fixes bug 33316; bugfix on 0.4.0.1-alpha.
3687 o Minor bugfixes (IPv4, relay):
3688 - Check for invalid zero IPv4 addresses and ports when sending and
3689 receiving extend cells. Fixes bug 33900; bugfix on 0.2.4.8-alpha.
3691 o Minor bugfixes (IPv6, relay):
3692 - Consider IPv6 addresses when checking if a connection is
3693 canonical. In 17604, relays assumed that a remote relay could
3694 consider an IPv6 connection canonical, but did not set the
3695 canonical flag on their side of the connection. Fixes bug 33899;
3696 bugfix on 0.3.1.1-alpha.
3697 - Log IPv6 addresses on connections where this relay is the
3698 responder. Previously, responding relays would replace the remote
3699 IPv6 address with the IPv4 address from the consensus. Fixes bug
3700 33899; bugfix on 0.3.1.1-alpha.
3702 o Minor bugfixes (linux seccomp sandbox nss):
3703 - Fix a startup crash when tor is compiled with --enable-nss and
3704 sandbox support is enabled. Fixes bug 34130; bugfix on
3705 0.3.5.1-alpha. Patch by Daniel Pinto.
3707 o Minor bugfixes (logging, testing):
3708 - Make all of tor's assertion macros support the ALL_BUGS_ARE_FATAL
3709 and DISABLE_ASSERTS_IN_UNIT_TESTS debugging modes. (IF_BUG_ONCE()
3710 used to log a non-fatal warning, regardless of the debugging
3711 mode.) Fixes bug 33917; bugfix on 0.2.9.1-alpha.
3713 o Minor bugfixes (logs):
3714 - Remove surprising empty line in the INFO-level log about circuit
3715 build timeout. Fixes bug 33531; bugfix on 0.3.3.1-alpha.
3717 o Minor bugfixes (mainloop):
3718 - Better guard against growing a buffer past its maximum 2GB in
3719 size. Fixes bug 33131; bugfix on 0.3.0.4-rc.
3721 o Minor bugfixes (manual page):
3722 - Update the man page to reflect that MinUptimeHidServDirectoryV2
3723 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
3725 o Minor bugfixes (onion service v3, client):
3726 - Remove a BUG() that was causing a stacktrace when a descriptor
3727 changed at an unexpected time. Fixes bug 28992; bugfix
3730 o Minor bugfixes (onion service, logging):
3731 - Fix a typo in a log message PublishHidServDescriptors is set to 0.
3732 Fixes bug 33779; bugfix on 0.3.2.1-alpha.
3734 o Minor bugfixes (portability):
3735 - Fix a portability error in the configure script, where we were
3736 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
3738 o Minor bugfixes (protocol versions):
3739 - Sort tor's supported protocol version lists, as recommended by the
3740 tor directory specification. Fixes bug 33285; bugfix
3743 o Minor bugfixes (relays):
3744 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
3745 descriptors, when the IPv6 port was configured as "auto". Fixes
3746 bug 32588; bugfix on 0.2.3.9-alpha.
3748 o Code simplification and refactoring:
3749 - Define and use a new constant TOR_ADDRPORT_BUF_LEN which is like
3750 TOR_ADDR_BUF_LEN but includes enough space for an IP address,
3751 brackets, separating colon, and port number. Closes ticket 33956.
3752 Patch by Neel Chauhan.
3753 - Merge the orconn and ocirc events into the "core" subsystem, which
3754 manages or connections and origin circuits. Previously they were
3755 isolated in subsystems of their own.
3756 - Move LOG_PROTOCOL_WARN to app/config. Resolves a dependency
3757 inversion. Closes ticket 33633.
3758 - Move the circuit extend code to the relay module. Split the
3759 circuit extend function into smaller functions. Closes
3761 - Rewrite port_parse_config() to use the default port flags from
3762 port_cfg_new(). Closes ticket 32994. Patch by MrSquanchee.
3763 - Updated comments in 'scheduler.c' to reflect old code changes, and
3764 simplified the scheduler channel state change code. Closes
3768 - Document the limitations of using %include on config files with
3769 seccomp sandbox enabled. Fixes documentation bug 34133; bugfix on
3770 0.3.1.1-alpha. Patch by Daniel Pinto.
3771 - Fix several doxygen warnings related to imbalanced groups. Closes
3775 - Remove the ClientAutoIPv6ORPort option. This option attempted to
3776 randomly choose between IPv4 and IPv6 for client connections, and
3777 wasn't a true implementation of Happy Eyeballs. Often, this option
3778 failed on IPv4-only or IPv6-only connections. Closes ticket 32905.
3779 Patch by Neel Chauhan.
3780 - Stop shipping contrib/dist/rc.subr file, as it is not being used
3781 on FreeBSD anymore. Closes issue 31576.
3784 - Add a basic IPv6 test to "make test-network". This test only runs
3785 when the local machine has an IPv6 stack. Closes ticket 33300.
3786 - Add test-network-ipv4 and test-network-ipv6 jobs to the Makefile.
3787 These jobs run the IPv4-only and dual-stack chutney flavours from
3788 test-network-all. Closes ticket 33280.
3789 - Remove a redundant distcheck job. Closes ticket 33194.
3790 - Run the test-network-ipv6 Makefile target in the Travis CI IPv6
3791 chutney job. This job runs on macOS, so it's a bit slow. Closes
3793 - Sort the Travis jobs in order of speed. Putting the slowest jobs
3794 first takes full advantage of Travis job concurrency. Closes
3796 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
3797 previously configured to fast_finish (which requires
3798 allow_failure), to speed up the build. Closes ticket 33195.
3799 - Test v3 onion services to tor's mixed IPv4 chutney network. And
3800 add a mixed IPv6 chutney network. These networks are used in the
3801 test-network-all, test-network-ipv4, and test-network-ipv6 make
3802 targets. Closes ticket 33334.
3803 - Use the "bridges+hs-v23" chutney network flavour in "make test-
3804 network". This test requires a recent version of chutney (mid-
3805 February 2020). Closes ticket 28208.
3806 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
3807 tool to produce detailed diagnostic output. Closes ticket 32792.
3809 o Code simplification and refactoring (onion service):
3810 - Refactor configuration parsing to use the new config subsystem
3811 code. Closes ticket 33014.
3813 o Code simplification and refactoring (relay address):
3814 - Move a series of functions related to address resolving into their
3815 own files. Closes ticket 33789.
3817 o Documentation (manual page):
3818 - Add cross reference links and a table of contents to the HTML tor
3819 manual page. Closes ticket 33369. Work by Swati Thacker as part of
3820 Google Season of Docs.
3821 - Alphabetize the Denial of Service Mitigation Options, Directory
3822 Authority Server Options, Hidden Service Options, and Testing
3823 Network Options sections of the tor(1) manual page. Closes ticket
3824 33275. Work by Swati Thacker as part of Google Season of Docs.
3825 - Refrain from mentioning nicknames in manpage section for MyFamily
3826 torrc option. Resolves issue 33417.
3827 - Updated the options set by TestingTorNetwork in the manual page.
3828 Closes ticket 33778.
3831 Changes in version 0.4.3.5 - 2020-05-15
3832 Tor 0.4.3.5 is the first stable release in the 0.4.3.x series. This
3833 series adds support for building without relay code enabled, and
3834 implements functionality needed for OnionBalance with v3 onion
3835 services. It includes significant refactoring of our configuration and
3836 controller functionality, and fixes numerous smaller bugs and
3839 Per our support policy, we support each stable release series for nine
3840 months after its first stable release, or three months after the first
3841 stable release of the next series: whichever is longer. This means
3842 that 0.4.3.x will be supported until around February 2021--later, if
3843 0.4.4.x is later than anticipated.
3845 Note also that support for 0.4.1.x is about to end on May 20 of this
3846 year; 0.4.2.x will be supported until September 15. We still plan to
3847 continue supporting 0.3.5.x, our long-term stable series, until
3850 Below are the changes since 0.4.3.4-rc. For a complete list of changes
3851 since 0.4.2.6, see the ReleaseNotes file.
3853 o Minor bugfixes (compiler compatibility):
3854 - Avoid compiler warnings from Clang 10 related to the use of GCC-
3855 style "/* falls through */" comments. Both Clang and GCC allow
3856 __attribute__((fallthrough)) instead, so that's what we're using
3857 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
3858 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
3861 o Minor bugfixes (logging):
3862 - Stop truncating IPv6 addresses and ports in channel and connection
3863 logs. Fixes bug 33918; bugfix on 0.2.4.4-alpha.
3864 - Fix a logic error in a log message about whether an address was
3865 invalid. Previously, the code would never report that onion
3866 addresses were onion addresses. Fixes bug 34131; bugfix
3870 Changes in version 0.4.3.4-rc - 2020-04-13
3871 Tor 0.4.3.4-rc is the first release candidate in its series. It fixes
3872 several bugs from earlier versions, including one affecting DoS
3873 defenses on bridges using pluggable transports.
3875 o Major bugfixes (DoS defenses, bridges, pluggable transport):
3876 - Fix a bug that was preventing DoS defenses from running on bridges
3877 with a pluggable transport. Previously, the DoS subsystem was not
3878 given the transport name of the client connection, thus failed to
3879 find the GeoIP cache entry for that client address. Fixes bug
3880 33491; bugfix on 0.3.3.2-alpha.
3882 o Minor feature (sendme, flow control):
3883 - Default to sending SENDME version 1 cells. (Clients are already
3884 sending these, because of a consensus parameter telling them to do
3885 so: this change only affects what clients would do if the
3886 consensus didn't contain a recommendation.) Closes ticket 33623.
3888 o Minor features (testing):
3889 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
3890 variable to specify a list of space-separated test cases that
3891 should not be executed. We will use this to disable certain tests
3892 that are failing on Appveyor because of mismatched OpenSSL
3893 libraries. Part of ticket 33643.
3895 o Minor bugfixes (--disable-module-relay):
3896 - Fix an assertion failure when Tor is built without the relay
3897 module, and then invoked with the "User" option. Fixes bug 33668;
3898 bugfix on 0.4.3.1-alpha.
3900 o Minor bugfixes (--disable-module-relay,--disable-module-dirauth):
3901 - Set some output arguments in the relay and dirauth module stubs,
3902 to guard against future stub argument handling bugs like 33668.
3903 Fixes bug 33674; bugfix on 0.4.3.1-alpha.
3905 o Minor bugfixes (build system):
3906 - Correctly output the enabled module in the configure summary.
3907 Before that, the list shown was just plain wrong. Fixes bug 33646;
3908 bugfix on 0.4.3.2-alpha.
3910 o Minor bugfixes (client, IPv6):
3911 - Stop forcing all non-SocksPorts to prefer IPv6 exit connections.
3912 Instead, prefer IPv6 connections by default, but allow users to
3913 change their configs using the "NoPreferIPv6" port flag. Fixes bug
3914 33608; bugfix on 0.4.3.1-alpha.
3915 - Revert PreferIPv6 set by default on the SocksPort because it broke
3916 the torsocks use case. Tor doesn't have a way for an application
3917 to request the hostname to be resolved for a specific IP version,
3918 but torsocks requires that. Up until now, IPv4 was used by default
3919 so torsocks is expecting that, and can't handle a possible IPv6
3920 being returned. Fixes bug 33804; bugfix on 0.4.3.1-alpha.
3922 o Minor bugfixes (key portability):
3923 - When reading PEM-encoded key data, tolerate CRLF line-endings even
3924 if we are not running on Windows. Previously, non-Windows hosts
3925 would reject these line-endings in certain positions, making
3926 certain key files hard to move from one host to another. Fixes bug
3927 33032; bugfix on 0.3.5.1-alpha.
3929 o Minor bugfixes (logging):
3930 - Flush stderr, stdout, and file logs during shutdown, if supported
3931 by the OS. This change helps make sure that any final logs are
3932 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
3933 - Stop closing stderr and stdout during shutdown. Closing these file
3934 descriptors can hide sanitiser logs. Fixes bug 33087; bugfix
3937 o Minor bugfixes (onion services v3):
3938 - Relax severity of a log message that can appear naturally when
3939 decoding onion service descriptors as a relay. Also add some
3940 diagnostics to debug any future bugs in that area. Fixes bug
3941 31669; bugfix on 0.3.0.1-alpha.
3942 - Block a client-side assertion by disallowing the registration of
3943 an x25519 client auth key that's all zeroes. Fixes bug 33545;
3944 bugfix on 0.4.3.1-alpha. Based on patch from "cypherpunks".
3946 o Code simplification and refactoring:
3947 - Disable our coding standards best practices tracker in our git
3948 hooks. (0.4.3 branches only.) Closes ticket 33678.
3951 - Avoid conflicts between the fake sockets in tor's unit tests, and
3952 real file descriptors. Resolves issues running unit tests with
3953 GitHub Actions, where the process that embeds or launches the
3954 tests has already opened a large number of file descriptors. Fixes
3955 bug 33782; bugfix on 0.2.8.1-alpha. Found and fixed by
3959 - In our Appveyor Windows CI, copy required DLLs to test and app
3960 directories, before running tor's tests. This ensures that tor.exe
3961 and test*.exe use the correct version of each DLL. This fix is not
3962 required, but we hope it will avoid DLL search issues in future.
3963 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
3964 - On Appveyor, skip the crypto/openssl_version test, which is
3965 failing because of a mismatched library installation. Fix
3969 Changes in version 0.4.3.3-alpha - 2020-03-18
3970 Tor 0.4.3.3-alpha fixes several bugs in previous releases, including
3971 TROVE-2020-002, a major denial-of-service vulnerability that affected
3972 all released Tor instances since 0.2.1.5-alpha. Using this
3973 vulnerability, an attacker could cause Tor instances to consume a huge
3974 amount of CPU, disrupting their operations for several seconds or
3975 minutes. This attack could be launched by anybody against a relay, or
3976 by a directory cache against any client that had connected to it. The
3977 attacker could launch this attack as much as they wanted, thereby
3978 disrupting service or creating patterns that could aid in traffic
3979 analysis. This issue was found by OSS-Fuzz, and is also tracked
3982 We do not have reason to believe that this attack is currently being
3983 exploited in the wild, but nonetheless we advise everyone to upgrade
3984 as soon as packages are available.
3986 o Major bugfixes (security, denial-of-service):
3987 - Fix a denial-of-service bug that could be used by anyone to
3988 consume a bunch of CPU on any Tor relay or authority, or by
3989 directories to consume a bunch of CPU on clients or hidden
3990 services. Because of the potential for CPU consumption to
3991 introduce observable timing patterns, we are treating this as a
3992 high-severity security issue. Fixes bug 33119; bugfix on
3993 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
3994 as TROVE-2020-002 and CVE-2020-10592.
3996 o Major bugfixes (circuit padding, memory leak):
3997 - Avoid a remotely triggered memory leak in the case that a circuit
3998 padding machine is somehow negotiated twice on the same circuit.
3999 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
4000 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
4002 o Major bugfixes (directory authority):
4003 - Directory authorities will now send a 503 (not enough bandwidth)
4004 code to clients when under bandwidth pressure. Known relays and
4005 other authorities will always be answered regardless of the
4006 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
4008 o Minor features (diagnostic):
4009 - Improve assertions and add some memory-poisoning code to try to
4010 track down possible causes of a rare crash (32564) in the EWMA
4011 code. Closes ticket 33290.
4013 o Minor features (directory authorities):
4014 - Directory authorities now reject descriptors from relays running
4015 Tor versions from the 0.2.9 and 0.4.0 series. The 0.3.5 series is
4016 still allowed. Resolves ticket 32672. Patch by Neel Chauhan.
4018 o Minor features (usability):
4019 - Include more information when failing to parse a configuration
4020 value. This should make it easier to tell what's going wrong when
4021 a configuration file doesn't parse. Closes ticket 33460.
4023 o Minor bugfix (relay, configuration):
4024 - Warn if the ContactInfo field is not set, and tell the relay
4025 operator that not having a ContactInfo field set might cause their
4026 relay to get rejected in the future. Fixes bug 33361; bugfix
4029 o Minor bugfixes (coding best practices checks):
4030 - Allow the "practracker" script to read unicode files when using
4031 Python 2. We made the script use unicode literals in 0.4.3.1-alpha,
4032 but didn't change the codec for opening files. Fixes bug 33374;
4033 bugfix on 0.4.3.1-alpha.
4035 o Minor bugfixes (continuous integration):
4036 - Remove the buggy and unused mirroring job. Fixes bug 33213; bugfix
4039 o Minor bugfixes (onion service v3, client):
4040 - Remove a BUG() warning that would cause a stack trace if an onion
4041 service descriptor was freed while we were waiting for a
4042 rendezvous circuit to complete. Fixes bug 28992; bugfix
4045 o Minor bugfixes (onion services v3):
4046 - Fix an assertion failure that could result from a corrupted
4047 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
4048 bugfix on 0.3.3.1-alpha. This issue is also tracked
4051 o Documentation (manpage):
4052 - Alphabetize the Server and Directory server sections of the tor
4053 manpage. Also split Statistics options into their own section of
4054 the manpage. Closes ticket 33188. Work by Swati Thacker as part of
4055 Google Season of Docs.
4056 - Document the __OwningControllerProcess torrc option and specify
4057 its polling interval. Resolves issue 32971.
4059 o Testing (Travis CI):
4060 - Remove a redundant distcheck job. Closes ticket 33194.
4061 - Sort the Travis jobs in order of speed: putting the slowest jobs
4062 first takes full advantage of Travis job concurrency. Closes
4064 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4065 previously configured to fast_finish (which requires
4066 allow_failure), to speed up the build. Closes ticket 33195.
4067 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4068 tool to produce detailed diagnostic output. Closes ticket 32792.
4071 Changes in version 0.4.2.7 - 2020-03-18
4072 This is the third stable release in the 0.4.2.x series. It backports
4073 numerous fixes from later releases, including a fix for TROVE-2020-
4074 002, a major denial-of-service vulnerability that affected all
4075 released Tor instances since 0.2.1.5-alpha. Using this vulnerability,
4076 an attacker could cause Tor instances to consume a huge amount of CPU,
4077 disrupting their operations for several seconds or minutes. This
4078 attack could be launched by anybody against a relay, or by a directory
4079 cache against any client that had connected to it. The attacker could
4080 launch this attack as much as they wanted, thereby disrupting service
4081 or creating patterns that could aid in traffic analysis. This issue
4082 was found by OSS-Fuzz, and is also tracked as CVE-2020-10592.
4084 We do not have reason to believe that this attack is currently being
4085 exploited in the wild, but nonetheless we advise everyone to upgrade
4086 as soon as packages are available.
4088 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
4089 - Fix a denial-of-service bug that could be used by anyone to
4090 consume a bunch of CPU on any Tor relay or authority, or by
4091 directories to consume a bunch of CPU on clients or hidden
4092 services. Because of the potential for CPU consumption to
4093 introduce observable timing patterns, we are treating this as a
4094 high-severity security issue. Fixes bug 33119; bugfix on
4095 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
4096 as TROVE-2020-002 and CVE-2020-10592.
4098 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
4099 - Avoid a remotely triggered memory leak in the case that a circuit
4100 padding machine is somehow negotiated twice on the same circuit.
4101 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
4102 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
4104 o Major bugfixes (directory authority, backport from 0.4.3.3-alpha):
4105 - Directory authorities will now send a 503 (not enough bandwidth)
4106 code to clients when under bandwidth pressure. Known relays and
4107 other authorities will always be answered regardless of the
4108 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
4110 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
4111 - Stop allowing failures on the Travis CI stem tests job. It looks
4112 like all the stem hangs we were seeing before are now fixed.
4113 Closes ticket 33075.
4115 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
4116 - Lowercase the configured value of BridgeDistribution before adding
4117 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4119 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
4120 - If we encounter a bug when flushing a buffer to a TLS connection,
4121 only log the bug once per invocation of the Tor process.
4122 Previously we would log with every occurrence, which could cause
4123 us to run out of disk space. Fixes bug 33093; bugfix
4126 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
4127 - Fix an assertion failure that could result from a corrupted
4128 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
4129 bugfix on 0.3.3.1-alpha. This issue is also tracked
4132 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
4133 - Fix a syntax warning given by newer versions of Rust that was
4134 creating problems for our continuous integration. Fixes bug 33212;
4135 bugfix on 0.3.5.1-alpha.
4137 o Testing (Travis CI, backport from 0.4.3.3-alpha):
4138 - Remove a redundant distcheck job. Closes ticket 33194.
4139 - Sort the Travis jobs in order of speed: putting the slowest jobs
4140 first takes full advantage of Travis job concurrency. Closes
4142 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4143 previously configured to fast_finish (which requires
4144 allow_failure), to speed up the build. Closes ticket 33195.
4145 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4146 tool to produce detailed diagnostic output. Closes ticket 32792.
4149 Changes in version 0.4.1.9 - 2020-03-18
4150 Tor 0.4.1.9 backports important fixes from later Tor releases,
4151 including a fix for TROVE-2020-002, a major denial-of-service
4152 vulnerability that affected all released Tor instances since
4153 0.2.1.5-alpha. Using this vulnerability, an attacker could cause Tor
4154 instances to consume a huge amount of CPU, disrupting their operations
4155 for several seconds or minutes. This attack could be launched by
4156 anybody against a relay, or by a directory cache against any client
4157 that had connected to it. The attacker could launch this attack as
4158 much as they wanted, thereby disrupting service or creating patterns
4159 that could aid in traffic analysis. This issue was found by OSS-Fuzz,
4160 and is also tracked as CVE-2020-10592.
4162 We do not have reason to believe that this attack is currently being
4163 exploited in the wild, but nonetheless we advise everyone to upgrade
4164 as soon as packages are available.
4166 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
4167 - Fix a denial-of-service bug that could be used by anyone to
4168 consume a bunch of CPU on any Tor relay or authority, or by
4169 directories to consume a bunch of CPU on clients or hidden
4170 services. Because of the potential for CPU consumption to
4171 introduce observable timing patterns, we are treating this as a
4172 high-severity security issue. Fixes bug 33119; bugfix on
4173 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
4174 as TROVE-2020-002 and CVE-2020-10592.
4176 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
4177 - Avoid a remotely triggered memory leak in the case that a circuit
4178 padding machine is somehow negotiated twice on the same circuit.
4179 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
4180 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
4182 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
4183 - Lowercase the configured value of BridgeDistribution before adding
4184 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4186 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
4187 - If we encounter a bug when flushing a buffer to a TLS connection,
4188 only log the bug once per invocation of the Tor process.
4189 Previously we would log with every occurrence, which could cause
4190 us to run out of disk space. Fixes bug 33093; bugfix
4193 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
4194 - Fix an assertion failure that could result from a corrupted
4195 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
4196 bugfix on 0.3.3.1-alpha. This issue is also tracked
4199 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
4200 - Fix a syntax warning given by newer versions of Rust that was
4201 creating problems for our continuous integration. Fixes bug 33212;
4202 bugfix on 0.3.5.1-alpha.
4204 o Testing (Travis CI, backport from 0.4.3.3-alpha):
4205 - Remove a redundant distcheck job. Closes ticket 33194.
4206 - Sort the Travis jobs in order of speed: putting the slowest jobs
4207 first takes full advantage of Travis job concurrency. Closes
4209 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4210 previously configured to fast_finish (which requires
4211 allow_failure), to speed up the build. Closes ticket 33195.
4212 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4213 tool to produce detailed diagnostic output. Closes ticket 32792.
4216 Changes in version 0.3.5.10 - 2020-03-18
4217 Tor 0.3.5.10 backports many fixes from later Tor releases, including a
4218 fix for TROVE-2020-002, a major denial-of-service vulnerability that
4219 affected all released Tor instances since 0.2.1.5-alpha. Using this
4220 vulnerability, an attacker could cause Tor instances to consume a huge
4221 amount of CPU, disrupting their operations for several seconds or
4222 minutes. This attack could be launched by anybody against a relay, or
4223 by a directory cache against any client that had connected to it. The
4224 attacker could launch this attack as much as they wanted, thereby
4225 disrupting service or creating patterns that could aid in traffic
4226 analysis. This issue was found by OSS-Fuzz, and is also tracked
4229 We do not have reason to believe that this attack is currently being
4230 exploited in the wild, but nonetheless we advise everyone to upgrade
4231 as soon as packages are available.
4233 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
4234 - Fix a denial-of-service bug that could be used by anyone to
4235 consume a bunch of CPU on any Tor relay or authority, or by
4236 directories to consume a bunch of CPU on clients or hidden
4237 services. Because of the potential for CPU consumption to
4238 introduce observable timing patterns, we are treating this as a
4239 high-severity security issue. Fixes bug 33119; bugfix on
4240 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
4241 as TROVE-2020-002 and CVE-2020-10592.
4243 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
4244 - Correct how we use libseccomp. Particularly, stop assuming that
4245 rules are applied in a particular order or that more rules are
4246 processed after the first match. Neither is the case! In
4247 libseccomp <2.4.0 this lead to some rules having no effect.
4248 libseccomp 2.4.0 changed how rules are generated, leading to a
4249 different ordering, which in turn led to a fatal crash during
4250 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4253 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
4254 - Stop allowing failures on the Travis CI stem tests job. It looks
4255 like all the stem hangs we were seeing before are now fixed.
4256 Closes ticket 33075.
4258 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
4259 - Lowercase the configured value of BridgeDistribution before adding
4260 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4262 o Minor bugfixes (crash, backport from 0.4.2.4-rc):
4263 - When running Tor with an option like --verify-config or
4264 --dump-config that does not start the event loop, avoid crashing
4265 if we try to exit early because of an error. Fixes bug 32407;
4266 bugfix on 0.3.3.1-alpha.
4268 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
4269 - If we encounter a bug when flushing a buffer to a TLS connection,
4270 only log the bug once per invocation of the Tor process.
4271 Previously we would log with every occurrence, which could cause
4272 us to run out of disk space. Fixes bug 33093; bugfix
4275 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
4276 - Fix an assertion failure that could result from a corrupted
4277 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
4278 bugfix on 0.3.3.1-alpha. This issue is also tracked
4281 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
4282 - Fix a syntax warning given by newer versions of Rust that was
4283 creating problems for our continuous integration. Fixes bug 33212;
4284 bugfix on 0.3.5.1-alpha.
4286 o Testing (backport from 0.4.3.1-alpha):
4287 - Re-enable the Travis CI macOS Chutney build, but don't let it
4288 prevent the Travis job from finishing. (The Travis macOS jobs are
4289 slow, so we don't want to have it delay the whole CI process.)
4290 Closes ticket 32629.
4291 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4292 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4293 fix the sandbox errors in 32722. Closes ticket 32240.
4295 o Testing (continuous integration, backport from 0.4.3.1-alpha):
4296 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4298 o Testing (Travis CI, backport from 0.4.3.3-alpha):
4299 - Remove a redundant distcheck job. Closes ticket 33194.
4300 - Sort the Travis jobs in order of speed: putting the slowest jobs
4301 first takes full advantage of Travis job concurrency. Closes
4303 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4304 previously configured to fast_finish (which requires
4305 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4306 tool to produce detailed diagnostic output. Closes ticket 32792.
4309 Changes in version 0.4.3.2-alpha - 2020-02-10
4310 This is the second stable alpha release in the Tor 0.4.3.x series. It
4311 fixes several bugs present in the previous alpha release. Anybody
4312 running the previous alpha should upgrade, and look for bugs in this
4315 o Major bugfixes (onion service client, authorization):
4316 - On a NEWNYM signal, purge entries from the ephemeral client
4317 authorization cache. The permanent ones are kept. Fixes bug 33139;
4318 bugfix on 0.4.3.1-alpha.
4320 o Minor features (best practices tracker):
4321 - Practracker now supports a --regen-overbroad option to regenerate
4322 the exceptions file, but only to revise exceptions to be _less_
4323 tolerant of best-practices violations. Closes ticket 32372.
4325 o Minor features (continuous integration):
4326 - Run Doxygen Makefile target on Travis, so we can learn about
4327 regressions in our internal documentation. Closes ticket 32455.
4328 - Stop allowing failures on the Travis CI stem tests job. It looks
4329 like all the stem hangs we were seeing before are now fixed.
4330 Closes ticket 33075.
4332 o Minor bugfixes (build system):
4333 - Revise configure options that were either missing or incorrect in
4334 the configure summary. Fixes bug 32230; bugfix on 0.4.3.1-alpha.
4336 o Minor bugfixes (controller protocol):
4337 - Fix a memory leak introduced by refactoring of control reply
4338 formatting code. Fixes bug 33039; bugfix on 0.4.3.1-alpha.
4339 - Fix a memory leak in GETINFO responses. Fixes bug 33103; bugfix
4341 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
4342 report them as SIGNAL events. Previously we would log a bug
4343 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
4345 o Minor bugfixes (logging):
4346 - If we encounter a bug when flushing a buffer to a TLS connection,
4347 only log the bug once per invocation of the Tor process.
4348 Previously we would log with every occurrence, which could cause
4349 us to run out of disk space. Fixes bug 33093; bugfix
4351 - When logging a bug, do not say "Future instances of this warning
4352 will be silenced" unless we are actually going to silence them.
4353 Previously we would say this whenever a BUG() check failed in the
4354 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
4356 o Minor bugfixes (onion service v2):
4357 - Move a series of v2 onion service warnings to protocol-warning
4358 level because they can all be triggered remotely by a malformed
4359 request. Fixes bug 32706; bugfix on 0.1.1.14-alpha.
4361 o Minor bugfixes (onion service v3, client authorization):
4362 - When removing client authorization credentials using the control
4363 port, also remove the associated descriptor, so the onion service
4364 can no longer be contacted. Fixes bug 33148; bugfix
4367 o Minor bugfixes (pluggable transports):
4368 - When receiving a message on standard error from a pluggable
4369 transport, log it at info level, rather than as a warning. Fixes
4370 bug 33005; bugfix on 0.4.0.1-alpha.
4372 o Minor bugfixes (rust, build):
4373 - Fix a syntax warning given by newer versions of Rust that was
4374 creating problems for our continuous integration. Fixes bug 33212;
4375 bugfix on 0.3.5.1-alpha.
4377 o Minor bugfixes (TLS bug handling):
4378 - When encountering a bug in buf_read_from_tls(), return a "MISC"
4379 error code rather than "WANTWRITE". This change might help avoid
4380 some CPU-wasting loops if the bug is ever triggered. Bug reported
4381 by opara. Fixes bug 32673; bugfix on 0.3.0.4-alpha.
4383 o Code simplification and refactoring (mainloop):
4384 - Simplify the ip_address_changed() function by removing redundant
4385 checks. Closes ticket 33091.
4387 o Documentation (manpage):
4388 - Split "Circuit Timeout" options and "Node Selection" options into
4389 their own sections of the tor manpage. Closes tickets 32928 and
4390 32929. Work by Swati Thacker as part of Google Season of Docs.
4393 Changes in version 0.4.2.6 - 2020-01-30
4394 This is the second stable release in the 0.4.2.x series. It backports
4395 several bugfixes from 0.4.3.1-alpha, including some that had affected
4396 the Linux seccomp2 sandbox or Windows services. If you're running with
4397 one of those configurations, you'll probably want to upgrade;
4398 otherwise, you should be fine with 0.4.2.5.
4400 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
4401 - Correct how we use libseccomp. Particularly, stop assuming that
4402 rules are applied in a particular order or that more rules are
4403 processed after the first match. Neither is the case! In
4404 libseccomp <2.4.0 this led to some rules having no effect.
4405 libseccomp 2.4.0 changed how rules are generated, leading to a
4406 different ordering, which in turn led to a fatal crash during
4407 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4409 - Fix crash when reloading logging configuration while the
4410 experimental sandbox is enabled. Fixes bug 32841; bugfix on
4411 0.4.1.7. Patch by Peter Gerber.
4413 o Minor bugfixes (correctness checks, backport from 0.4.3.1-alpha):
4414 - Use GCC/Clang's printf-checking feature to make sure that
4415 tor_assertf() arguments are correctly typed. Fixes bug 32765;
4416 bugfix on 0.4.1.1-alpha.
4418 o Minor bugfixes (logging, crash, backport from 0.4.3.1-alpha):
4419 - Avoid a possible crash when trying to log a (fatal) assertion
4420 failure about mismatched magic numbers in configuration objects.
4421 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
4423 o Minor bugfixes (testing, backport from 0.4.3.1-alpha):
4424 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
4425 test_practracker.sh script. Doing so caused a test failure. Fixes
4426 bug 32705; bugfix on 0.4.2.1-alpha.
4427 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
4428 skipping practracker checks. Fixes bug 32705; bugfix
4431 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
4432 - Initialize the publish/subscribe system when running as a windows
4433 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
4435 o Testing (backport from 0.4.3.1-alpha):
4436 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4437 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4438 fix the sandbox errors in 32722. Closes ticket 32240.
4439 - Re-enable the Travis CI macOS Chutney build, but don't let it
4440 prevent the Travis job from finishing. (The Travis macOS jobs are
4441 slow, so we don't want to have it delay the whole CI process.)
4442 Closes ticket 32629.
4444 o Testing (continuous integration, backport from 0.4.3.1-alpha):
4445 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4448 Changes in version 0.4.1.8 - 2020-01-30
4449 This release backports several bugfixes from later release series,
4450 including some that had affected the Linux seccomp2 sandbox or Windows
4451 services. If you're running with one of those configurations, you'll
4452 probably want to upgrade; otherwise, you should be fine with your
4453 current version of 0.4.1.x.
4455 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
4456 - Correct how we use libseccomp. Particularly, stop assuming that
4457 rules are applied in a particular order or that more rules are
4458 processed after the first match. Neither is the case! In
4459 libseccomp <2.4.0 this led to some rules having no effect.
4460 libseccomp 2.4.0 changed how rules are generated, leading to a
4461 different ordering, which in turn led to a fatal crash during
4462 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4464 - Fix crash when reloading logging configuration while the
4465 experimental sandbox is enabled. Fixes bug 32841; bugfix on
4466 0.4.1.7. Patch by Peter Gerber.
4468 o Minor bugfixes (crash, backport form 0.4.2.4-rc):
4469 - When running Tor with an option like --verify-config or
4470 --dump-config that does not start the event loop, avoid crashing
4471 if we try to exit early because of an error. Fixes bug 32407;
4472 bugfix on 0.3.3.1-alpha.
4474 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
4475 - Initialize the publish/subscribe system when running as a windows
4476 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
4478 o Testing (backport from 0.4.3.1-alpha):
4479 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4480 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4481 fix the sandbox errors in 32722. Closes ticket 32240.
4482 - Re-enable the Travis CI macOS Chutney build, but don't let it
4483 prevent the Travis job from finishing. (The Travis macOS jobs are
4484 slow, so we don't want to have it delay the whole CI process.)
4485 Closes ticket 32629.
4487 o Testing (continuous integration, backport from 0.4.3.1-alpha):
4488 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4491 Changes in version 0.4.3.1-alpha - 2020-01-22
4492 This is the first alpha release in the 0.4.3.x series. It includes
4493 improved support for application integration of onion services, support
4494 for building in a client-only mode, and newly improved internal
4495 documentation (online at https://src-ref.docs.torproject.org/tor/). It
4496 also has numerous other small bugfixes and features, as well as
4497 improvements to our code's internal organization that should help us
4498 write better code in the future.
4500 o New system requirements:
4501 - When building Tor, you now need to have Python 3 in order to run
4502 the integration tests. (Python 2 is officially unsupported
4503 upstream, as of 1 Jan 2020.) Closes ticket 32608.
4505 o Major features (build system):
4506 - The relay code can now be disabled using the --disable-module-relay
4507 configure option. When this option is set, we also disable the
4508 dirauth module. Closes ticket 32123.
4509 - When Tor is compiled --disable-module-relay, we also omit the code
4510 used to act as a directory cache. Closes ticket 32487.
4512 o Major features (directory authority, ed25519):
4513 - Add support for banning a relay's ed25519 keys in the approved-
4514 routers file. This will help us migrate away from RSA keys in the
4515 future. Previously, only RSA keys could be banned in approved-
4516 routers. Resolves ticket 22029. Patch by Neel Chauhan.
4518 o Major features (onion service, controller):
4519 - New control port commands to manage client-side onion service
4520 authorization credentials. The ONION_CLIENT_AUTH_ADD command adds
4521 a credential, ONION_CLIENT_AUTH_REMOVE deletes a credential, and
4522 ONION_CLIENT_AUTH_VIEW lists the credentials. Closes ticket 30381.
4524 o Major features (onion service, SOCKS5):
4525 - Introduce a new SocksPort flag, ExtendedErrors, to support more
4526 detailed error codes in information for applications that support
4527 them. Closes ticket 30382; implements proposal 304.
4529 o Major features (proxy):
4530 - In addition to its current supported proxy types (HTTP CONNECT,
4531 SOCKS4, and SOCKS5), Tor can now make its OR connections through a
4532 HAProxy server. A new torrc option was added to specify the
4533 address/port of the server: TCPProxy <protocol> <host>:<port>.
4534 Currently the only supported protocol for the option is haproxy.
4535 Closes ticket 31518. Patch done by Suphanat Chunhapanya (haxxpop).
4537 o Major bugfixes (linux seccomp sandbox):
4538 - Correct how we use libseccomp. Particularly, stop assuming that
4539 rules are applied in a particular order or that more rules are
4540 processed after the first match. Neither is the case! In
4541 libseccomp <2.4.0 this led to some rules having no effect.
4542 libseccomp 2.4.0 changed how rules are generated, leading to a
4543 different ordering, which in turn led to a fatal crash during
4544 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4546 - Fix crash when reloading logging configuration while the
4547 experimental sandbox is enabled. Fixes bug 32841; bugfix on
4548 0.4.1.7. Patch by Peter Gerber.
4550 o Major bugfixes (networking):
4551 - Correctly handle IPv6 addresses in SOCKS5 RESOLVE_PTR requests,
4552 and accept strings as well as binary addresses. Fixes bug 32315;
4553 bugfix on 0.3.5.1-alpha.
4555 o Major bugfixes (onion service):
4556 - Report HS circuit failure back into the HS subsystem so we take
4557 appropriate action with regards to the client introduction point
4558 failure cache. This improves reachability of onion services, since
4559 now clients notice failing introduction circuits properly. Fixes
4560 bug 32020; bugfix on 0.3.2.1-alpha.
4562 o Minor feature (configure, build system):
4563 - Output a list of enabled/disabled features at the end of the
4564 configure process in a pleasing way. Closes ticket 31373.
4566 o Minor feature (heartbeat, onion service):
4567 - Add the DoS INTRODUCE2 defenses counter to the heartbeat DoS
4568 message. Closes ticket 31371.
4570 o Minor features (configuration validation):
4571 - Configuration validation can now be done by per-module callbacks,
4572 rather than a global validation function. This will let us reduce
4573 the size of config.c and some of its more cumbersome functions.
4574 Closes ticket 31241.
4576 o Minor features (configuration):
4577 - If a configured hardware crypto accelerator in AccelName is
4578 prefixed with "!", Tor now exits when it cannot be found. Closes
4580 - We now use flag-driven logic to warn about obsolete configuration
4581 fields, so that we can include their names. In 0.4.2, we used a
4582 special type, which prevented us from generating good warnings.
4583 Implements ticket 32404.
4585 o Minor features (controller):
4586 - Add stream isolation data to STREAM event. Closes ticket 19859.
4587 - Implement a new GETINFO command to fetch microdescriptor
4588 consensus. Closes ticket 31684.
4590 o Minor features (debugging, directory system):
4591 - Don't crash when we find a non-guard with a guard-fraction value
4592 set. Instead, log a bug warning, in an attempt to figure out how
4593 this happened. Diagnostic for ticket 32868.
4595 o Minor features (defense in depth):
4596 - Add additional checks around tor_vasprintf() usage, in case the
4597 function returns an error. Patch by Tobias Stoeckmann. Fixes
4600 o Minor features (developer tooling):
4601 - Remove the 0.2.9.x series branches from git scripts (git-merge-
4602 forward.sh, git-pull-all.sh, git-push-all.sh, git-setup-dirs.sh).
4603 Closes ticket 32772.
4605 o Minor features (developer tools):
4606 - Add a check_cocci_parse.sh script that checks that new code is
4607 parseable by Coccinelle. Add an exceptions file for unparseable
4608 files, and run the script from travis CI. Closes ticket 31919.
4609 - Call the check_cocci_parse.sh script from a 'check-cocci' Makefile
4610 target. Closes ticket 31919.
4611 - Add a rename_c_identifiers.py tool to rename a bunch of C
4612 identifiers at once, and generate a well-formed commit message
4613 describing the change. This should help with refactoring. Closes
4615 - Add some scripts in "scripts/coccinelle" to invoke the Coccinelle
4616 semantic patching tool with the correct flags. These flags are
4617 fairly easy to forget, and these scripts should help us use
4618 Coccinelle more effectively in the future. Closes ticket 31705.
4620 o Minor features (Doxygen):
4621 - Update Doxygen configuration file to a more recent template (from
4622 1.8.15). Closes ticket 32110.
4623 - "make doxygen" now works with out-of-tree builds. Closes
4625 - Make sure that doxygen outputs documentation for all of our C
4626 files. Previously, some were missing @file declarations, causing
4627 them to be ignored. Closes ticket 32307.
4628 - Our "make doxygen" target now respects --enable-fatal-warnings by
4629 default, and does not warn about items that are missing
4630 documentation. To warn about missing documentation, run configure
4631 with the "--enable-missing-doc-warnings" flag: doing so suspends
4632 fatal warnings for doxygen. Closes ticket 32385.
4634 o Minor features (git scripts):
4635 - Add TOR_EXTRA_CLONE_ARGS to git-setup-dirs.sh for git clone
4636 customisation. Closes ticket 32347.
4637 - Add git-setup-dirs.sh, which sets up an upstream git repository
4638 and worktrees for tor maintainers. Closes ticket 29603.
4639 - Add TOR_EXTRA_REMOTE_* to git-setup-dirs.sh for a custom extra
4640 remote. Closes ticket 32347.
4641 - Call the check_cocci_parse.sh script from the git commit and push
4642 hooks. Closes ticket 31919.
4643 - Make git-push-all.sh skip unchanged branches when pushing to
4644 upstream. The script already skipped unchanged test branches.
4645 Closes ticket 32216.
4646 - Make git-setup-dirs.sh create a master symlink in the worktree
4647 directory. Closes ticket 32347.
4648 - Skip unmodified source files when doing some existing git hook
4649 checks. Related to ticket 31919.
4651 o Minor features (IPv6, client):
4652 - Make Tor clients tell dual-stack exits that they prefer IPv6
4653 connections. This change is equivalent to setting the PreferIPv6
4654 flag on SOCKSPorts (and most other listener ports). Tor Browser
4655 has been setting this flag for some time, and we want to remove a
4656 client distinguisher at exits. Closes ticket 32637.
4658 o Minor features (portability, android):
4659 - When building for Android, disable some tests that depend on $HOME
4660 and/or pwdb, which Android doesn't have. Closes ticket 32825.
4661 Patch from Hans-Christoph Steiner.
4663 o Minor features (relay modularity):
4664 - Split the relay and server pluggable transport config code into
4665 separate files in the relay module. Disable this code when the
4666 relay module is disabled. Closes part of ticket 32213.
4667 - When the relay module is disabled, reject attempts to set the
4668 ORPort, DirPort, DirCache, BridgeRelay, ExtORPort, or
4669 ServerTransport* options, rather than ignoring the values of these
4670 options. Closes part of ticket 32213.
4672 o Minor features (relay):
4673 - When the relay module is disabled, change the default config so
4674 that DirCache is 0, and ClientOnly is 1. Closes ticket 32410.
4676 o Minor features (release tools):
4677 - Port our ChangeLog formatting and sorting tools to Python 3.
4678 Closes ticket 32704.
4680 o Minor features (testing):
4681 - Detect some common failure cases for test_parseconf.sh in
4682 src/test/conf_failures. Closes ticket 32451.
4683 - Allow test_parseconf.sh to test expected log outputs for successful
4684 configs, as well as failed configs. Closes ticket 32451.
4685 - The test_parseconf.sh script now supports result variants for any
4686 combination of the optional libraries lzma, nss, and zstd. Closes
4689 o Minor features (tests, Android):
4690 - When running the unit tests on Android, create temporary files in
4691 a subdirectory of /data/local/tmp. Closes ticket 32172. Based on a
4692 patch from Hans-Christoph Steiner.
4694 o Minor bugfixes (bridges):
4695 - Lowercase the configured value of BridgeDistribution before adding
4696 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4698 o Minor bugfixes (build system):
4699 - Fix "make autostyle" for out-of-tree builds. Fixes bug 32370;
4700 bugfix on 0.4.1.2-alpha.
4702 o Minor bugfixes (configuration handling):
4703 - Make control_event_conf_changed() take in a config_line_t instead
4704 of a smartlist of alternating key/value entries. Fixes bug 31531;
4705 bugfix on 0.2.3.3-alpha. Patch by Neel Chauhan.
4707 o Minor bugfixes (configuration):
4708 - Check for multiplication overflow when parsing memory units inside
4709 configuration. Fixes bug 30920; bugfix on 0.0.9rc1.
4710 - When dumping the configuration, stop adding a trailing space after
4711 the option name when there is no option value. This issue only
4712 affects options that accept an empty value or list. (Most options
4713 reject empty values, or delete the entire line from the dumped
4714 options.) Fixes bug 32352; bugfix on 0.0.9pre6.
4715 - Avoid changing the user's value of HardwareAccel as stored by
4716 SAVECONF, when AccelName is set but HardwareAccel is not. Fixes
4717 bug 32382; bugfix on 0.2.2.1-alpha.
4718 - When creating a KeyDirectory with the same location as the
4719 DataDirectory (not recommended), respect the DataDirectory's
4720 group-readable setting if one has not been set for the
4721 KeyDirectory. Fixes bug 27992; bugfix on 0.3.3.1-alpha.
4723 o Minor bugfixes (controller):
4724 - In routerstatus_has_changed(), check all the fields that are
4725 output over the control port. Fixes bug 20218; bugfix
4728 o Minor bugfixes (correctness checks):
4729 - Use GCC/Clang's printf-checking feature to make sure that
4730 tor_assertf() arguments are correctly typed. Fixes bug 32765;
4731 bugfix on 0.4.1.1-alpha.
4733 o Minor bugfixes (developer tools):
4734 - Allow paths starting with ./ in scripts/add_c_file.py. Fixes bug
4735 31336; bugfix on 0.4.1.2-alpha.
4737 o Minor bugfixes (dirauth module):
4738 - Split the dirauth config code into a separate file in the dirauth
4739 module. Disable this code when the dirauth module is disabled.
4740 Closes ticket 32213.
4741 - When the dirauth module is disabled, reject attempts to set the
4742 AuthoritativeDir option, rather than ignoring the value of the
4743 option. Fixes bug 32213; bugfix on 0.3.4.1-alpha.
4745 o Minor bugfixes (embedded Tor):
4746 - When starting Tor any time after the first time in a process,
4747 register the thread in which it is running as the main thread.
4748 Previously, we only did this on Windows, which could lead to bugs
4749 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
4752 o Minor bugfixes (git scripts):
4753 - Avoid sleeping before the last push in git-push-all.sh. Closes
4755 - Forward all unrecognised arguments in git-push-all.sh to git push.
4756 Closes ticket 32216.
4758 o Minor bugfixes (hidden service v3):
4759 - Do not rely on a "circuit established" flag for intro circuits but
4760 instead always query the HS circuit map. This is to avoid sync
4761 issue with that flag and the map. Fixes bug 32094; bugfix
4764 o Minor bugfixes (logging, crash):
4765 - Avoid a possible crash when trying to log a (fatal) assertion
4766 failure about mismatched magic numbers in configuration objects.
4767 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
4769 o Minor bugfixes (onion service v2):
4770 - When sending the INTRO cell for a v2 Onion Service, look at the
4771 failure cache alongside timeout values to check if the intro point
4772 is marked as failed. Previously, we only looked at the relay
4773 timeout values. Fixes bug 25568; bugfix on 0.2.7.3-rc. Patch by
4776 o Minor bugfixes (onion services v3, client):
4777 - Properly handle the client rendezvous circuit timeout. Previously
4778 Tor would sometimes timeout a rendezvous circuit awaiting the
4779 introduction ACK, and find itself unable to re-establish all
4780 circuits because the rendezvous circuit timed out too early. Fixes
4781 bug 32021; bugfix on 0.3.2.1-alpha.
4783 o Minor bugfixes (onion services):
4784 - In cancel_descriptor_fetches(), use
4785 connection_list_by_type_purpose() instead of
4786 connection_list_by_type_state(). Fixes bug 32639; bugfix on
4787 0.3.2.1-alpha. Patch by Neel Chauhan.
4789 o Minor bugfixes (scripts):
4790 - Fix update_versions.py for out-of-tree builds. Fixes bug 32371;
4791 bugfix on 0.4.0.1-alpha.
4793 o Minor bugfixes (test):
4794 - Use the same code to find the tor binary in all of our test
4795 scripts. This change makes sure we are always using the coverage
4796 binary when coverage is enabled. Fixes bug 32368; bugfix
4799 o Minor bugfixes (testing):
4800 - Stop ignoring "tor --dump-config" errors in test_parseconf.sh.
4801 Fixes bug 32468; bugfix on 0.4.2.1-alpha.
4802 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
4803 test_practracker.sh script. Doing so caused a test failure. Fixes
4804 bug 32705; bugfix on 0.4.2.1-alpha.
4805 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
4806 skipping practracker checks. Fixes bug 32705; bugfix
4809 o Minor bugfixes (tests):
4810 - Our option-validation tests no longer depend on specially
4811 configured non-default, non-passing sets of options. Previously,
4812 the tests had been written to assume that options would _not_ be
4813 set to their defaults, which led to needless complexity and
4814 verbosity. Fixes bug 32175; bugfix on 0.2.8.1-alpha.
4816 o Minor bugfixes (windows service):
4817 - Initialize the publish/subscribe system when running as a windows
4818 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
4820 o Deprecated features:
4821 - Deprecate the ClientAutoIPv6ORPort option. This option was not
4822 true "Happy Eyeballs", and often failed on connections that
4823 weren't reliably dual-stack. Closes ticket 32942. Patch by
4827 - Provide a quickstart guide for a Circuit Padding Framework, and
4828 documentation for researchers to implement and study circuit
4829 padding machines. Closes ticket 28804.
4830 - Add documentation in 'HelpfulTools.md' to describe how to build a
4831 tag file. Closes ticket 32779.
4832 - Create a high-level description of the long-term software
4833 architecture goals. Closes ticket 32206.
4834 - Describe the --dump-config command in the manual page. Closes
4836 - Unite coding advice from this_not_that.md in torguts repo into our
4837 coding standards document. Resolves ticket 31853.
4840 - Our Doxygen configuration no longer generates LaTeX output. The
4841 reference manual produced by doing this was over 4000 pages long,
4842 and generally unusable. Closes ticket 32099.
4843 - The option "TestingEstimatedDescriptorPropagationTime" is now
4844 marked as obsolete. It has had no effect since 0.3.0.7, when
4845 clients stopped rejecting consensuses "from the future". Closes
4847 - We no longer support consensus methods before method 28; these
4848 methods were only used by authorities running versions of Tor that
4849 are now at end-of-life. In effect, this means that clients,
4850 relays, and authorities now assume that authorities will be
4851 running version 0.3.5.x or later. Closes ticket 32695.
4854 - Add more test cases for tor's UTF-8 validation function. Also,
4855 check the arguments passed to the function for consistency. Closes
4857 - Improve test coverage for relay and dirauth config code, focusing
4858 on option validation and normalization. Closes ticket 32213.
4859 - Improve the consistency of test_parseconf.sh output, and run all
4860 the tests, even if one fails. Closes ticket 32213.
4861 - Re-enable the Travis CI macOS Chutney build, but don't let it
4862 prevent the Travis job from finishing. (The Travis macOS jobs are
4863 slow, so we don't want to have it delay the whole CI process.)
4864 Closes ticket 32629.
4865 - Run the practracker unit tests in the pre-commit git hook. Closes
4867 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4868 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4869 fix the sandbox errors in 32722. Closes ticket 32240.
4871 o Code simplification and refactoring (channel):
4872 - Channel layer had a variable length cell handler that was not used
4873 and thus removed. Closes ticket 32892.
4875 o Code simplification and refactoring (configuration):
4876 - Immutability is now implemented as a flag on individual
4877 configuration options rather than as part of the option-transition
4878 checking code. Closes ticket 32344.
4879 - Instead of keeping a list of configuration options to check for
4880 relative paths, check all the options whose type is "FILENAME".
4881 Solves part of ticket 32339.
4882 - Our default log (which ordinarily sends NOTICE-level messages to
4883 standard output) is now handled in a more logical manner.
4884 Previously, we replaced the configured log options if they were
4885 empty. Now, we interpret an empty set of log options as meaning
4886 "use the default log". Closes ticket 31999.
4887 - Remove some unused arguments from the options_validate() function,
4888 to simplify our code and tests. Closes ticket 32187.
4889 - Simplify the options_validate() code so that it looks at the
4890 default options directly, rather than taking default options as an
4891 argument. This change lets us simplify its interface. Closes
4893 - Use our new configuration architecture to move most authority-
4894 related options to the directory authority module. Closes
4896 - When parsing the command line, handle options that determine our
4897 "quiet level" and our mode of operation (e.g., --dump-config and
4898 so on) all in one table. Closes ticket 32003.
4900 o Code simplification and refactoring (controller):
4901 - Create a new abstraction for formatting control protocol reply
4902 lines based on key-value pairs. Refactor some existing control
4903 protocol code to take advantage of this. Closes ticket 30984.
4904 - Create a helper function that can fetch network status or
4905 microdesc consensuses. Closes ticket 31684.
4907 o Code simplification and refactoring (dirauth modularization):
4908 - Remove the last remaining HAVE_MODULE_DIRAUTH inside a function.
4909 Closes ticket 32163.
4910 - Replace some confusing identifiers in process_descs.c. Closes
4912 - Simplify some relay and dirauth config code. Closes ticket 32213.
4914 o Code simplification and refactoring (misc):
4915 - Make all the structs we declare follow the same naming convention
4916 of ending with "_t". Closes ticket 32415.
4917 - Move and rename some configuration-related code for clarity.
4918 Closes ticket 32304.
4919 - Our include.am files are now broken up by subdirectory.
4920 Previously, src/core/include.am covered all of the subdirectories
4921 in "core", "feature", and "app". Closes ticket 32137.
4922 - Remove underused NS*() macros from test code: they make our tests
4923 more confusing, especially for code-formatting tools. Closes
4926 o Code simplification and refactoring (relay modularization):
4927 - Disable relay_periodic when the relay module is disabled. Closes
4929 - Disable relay_sys when the relay module is disabled. Closes
4932 o Code simplification and refactoring (tool support):
4933 - Add numerous missing dependencies to our include files, so that
4934 they can be included in different reasonable orders and still
4935 compile. Addresses part of ticket 32764.
4936 - Fix some parts of our code that were difficult for Coccinelle to
4937 parse. Related to ticket 31705.
4938 - Fix some small issues in our code that prevented automatic
4939 formatting tools from working. Addresses part of ticket 32764.
4941 o Documentation (manpage):
4942 - Alphabetize the Client Options section of the tor manpage. Closes
4944 - Alphabetize the General Options section of the tor manpage. Closes
4946 - In the tor(1) manpage, reword and improve formatting of the
4947 COMMAND-LINE OPTIONS and DESCRIPTION sections. Closes ticket
4948 32277. Based on work by Swati Thacker as part of Google Season
4950 - In the tor(1) manpage, reword and improve formatting of the FILES,
4951 SEE ALSO, and BUGS sections. Closes ticket 32176. Based on work by
4952 Swati Thacker as part of Google Season of Docs.
4954 o Testing (circuit, EWMA):
4955 - Add unit tests for circuitmux and EWMA subsystems. Closes
4958 o Testing (continuous integration):
4959 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4962 Changes in version 0.4.2.5 - 2019-12-09
4963 This is the first stable release in the 0.4.2.x series. This series
4964 improves reliability and stability, and includes several stability and
4965 correctness improvements for onion services. It also fixes many smaller
4966 bugs present in previous series.
4968 Per our support policy, we will support the 0.4.2.x series for nine
4969 months, or until three months after the release of a stable 0.4.3.x:
4970 whichever is longer. If you need longer-term support, please stick
4971 with 0.3.5.x, which will we plan to support until Feb 2022.
4973 Per our support policy, we will support the 0.4.2.x series for nine
4974 months, or until three months after the release of a stable 0.4.3.x:
4975 whichever is longer. If you need longer-term support, please stick
4976 with 0.3.5.x, which will we plan to support until Feb 2022.
4978 Below are the changes since 0.4.1.4-rc. For a complete list of changes
4979 since 0.4.1.5, see the ReleaseNotes file.
4981 o Minor features (geoip):
4982 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
4983 Country database. Closes ticket 32685.
4986 - Require C99 standards-conforming code in Travis CI, but allow GNU
4987 gcc extensions. Also activates clang's -Wtypedef-redefinition
4988 warnings. Build some jobs with -std=gnu99, and some jobs without.
4989 Closes ticket 32500.
4992 Changes in version 0.4.1.7 - 2019-12-09
4993 This release backports several bugfixes to improve stability and
4994 correctness. Anyone experiencing build problems or crashes with 0.4.1.6,
4995 including all relays relying on AccountingMax, should upgrade.
4997 o Major features (directory authorities, backport from 0.4.2.2-alpha):
4998 - Directory authorities now reject relays running all currently
4999 deprecated release series. The currently supported release series
5000 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
5002 o Major bugfixes (embedded Tor, backport from 0.4.2.2-alpha):
5003 - Avoid a possible crash when restarting Tor in embedded mode and
5004 enabling a different set of publish/subscribe messages. Fixes bug
5005 31898; bugfix on 0.4.1.1-alpha.
5007 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
5008 - Relays now respect their AccountingMax bandwidth again. When
5009 relays entered "soft" hibernation (which typically starts when
5010 we've hit 90% of our AccountingMax), we had stopped checking
5011 whether we should enter hard hibernation. Soft hibernation refuses
5012 new connections and new circuits, but the existing circuits can
5013 continue, meaning that relays could have exceeded their configured
5014 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
5016 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
5017 - Stop ignoring torrc options after an %include directive, when the
5018 included directory ends with a file that does not contain any
5019 config options (but does contain comments or whitespace). Fixes
5020 bug 31408; bugfix on 0.3.1.1-alpha.
5022 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
5023 - Onion services now always use the exact number of intro points
5024 configured with the HiddenServiceNumIntroductionPoints option (or
5025 fewer if nodes are excluded). Before, a service could sometimes
5026 pick more intro points than configured. Fixes bug 31548; bugfix
5029 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
5030 - When building on Appveyor and Travis, pass the "-k" flag to make,
5031 so that we are informed of all compilation failures, not just the
5032 first one or two. Closes ticket 31372.
5034 o Minor features (geoip, backport from 0.4.2.5):
5035 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
5036 Country database. Closes ticket 32685.
5038 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
5039 - Avoid spurious errors when Appveyor CI fails before the install step.
5040 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
5042 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
5043 - Fix a BUG() assertion that occurs within a very small race window
5044 between when a client intro circuit opens and when its descriptor
5045 gets cleaned up from the cache. The circuit is now closed early,
5046 which will trigger a re-fetch of the descriptor and continue the
5047 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
5049 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
5050 - Avoid trying to read data from closed connections, which can cause
5051 needless loops in Libevent and infinite loops in Shadow. Fixes bug
5052 30344; bugfix on 0.1.1.1-alpha.
5054 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
5055 - On abort, try harder to flush the output buffers of log messages.
5056 On some platforms (macOS), log messages could be discarded when
5057 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5058 - Report the tor version whenever an assertion fails. Previously, we
5059 only reported the Tor version on some crashes, and some non-fatal
5060 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5061 - When tor aborts due to an error, close log file descriptors before
5062 aborting. Closing the logs makes some OSes flush log file buffers,
5063 rather than deleting buffered log lines. Fixes bug 31594; bugfix
5066 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
5067 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
5068 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
5069 - Disable backtrace signal handlers when shutting down tor. Fixes
5070 bug 31614; bugfix on 0.2.5.2-alpha.
5071 - Rate-limit the logging message about the obsolete .exit
5072 notation. Previously, there was no limit on this warning, which
5073 could potentially be triggered many times by a hostile website.
5074 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
5076 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
5077 - Do not log a nonfatal assertion failure when receiving a VERSIONS
5078 cell on a connection using the obsolete v1 link protocol. Log a
5079 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
5081 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
5082 - Reset the periodic events' "enabled" flag when Tor is shut down
5083 cleanly. Previously, this flag was left on, which caused periodic
5084 events not to be re-enabled when Tor was relaunched in-process
5085 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5088 o Minor bugfixes (multithreading, backport from 0.4.2.2-alpha):
5089 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
5090 31736; bugfix on 0.0.7.
5092 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
5093 - Remove overly strict assertions that triggered when a pluggable
5094 transport failed to launch. Fixes bug 31091; bugfix
5096 - Remove an assertion in the Unix process backend. This assertion
5097 would trigger when we failed to find the executable for a child
5098 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
5100 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
5101 - Avoid crashing when starting with a corrupt keys directory where
5102 the old ntor key and the new ntor key are identical. Fixes bug
5103 30916; bugfix on 0.2.4.8-alpha.
5105 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
5106 - When testing port rebinding, don't busy-wait for tor to log.
5107 Instead, actually sleep for a short time before polling again.
5108 Also improve the formatting of control commands and log messages.
5109 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5111 o Minor bugfixes (tests, SunOS, backport from 0.4.2.2-alpha):
5112 - Avoid a map_anon_nofork test failure due to a signed/unsigned
5113 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
5115 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
5116 - Log bugs about the TLS read buffer's length only once, rather than
5117 filling the logs with similar warnings. Fixes bug 31939; bugfix
5120 o Documentation (backport from 0.4.2.2-alpha):
5121 - Explain why we can't destroy the backtrace buffer mutex. Explain
5122 why we don't need to destroy the log mutex. Closes ticket 31736.
5124 o Testing (continuous integration, backport from 0.4.2.3-alpha):
5125 - Disable all but one Travis CI macOS build, to mitigate slow
5126 scheduling of Travis macOS jobs. Closes ticket 32177.
5127 - Run the chutney IPv6 networks as part of Travis CI. Closes
5129 - Simplify the Travis CI build matrix, and optimise for build time.
5130 Closes ticket 31859.
5131 - Use Windows Server 2019 instead of Windows Server 2016 in our
5132 Appveyor builds. Closes ticket 32086.
5134 o Testing (continuous integration, backport from 0.4.2.4-rc):
5135 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5136 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5137 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5138 until we can fix some Bionic permissions issues (see ticket
5139 32240). Related to ticket 31919.
5140 - Install the mingw OpenSSL package in Appveyor. This makes sure
5141 that the OpenSSL headers and libraries match in Tor's Appveyor
5142 builds. (This bug was triggered by an Appveyor image update.)
5143 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5145 o Testing (continuous integration, backport from 0.4.2.5):
5146 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
5147 extensions. Also activates clang's -Wtypedef-redefinition warnings.
5148 Build some jobs with -std=gnu99, and some jobs without.
5149 Closes ticket 32500.
5152 Changes in version 0.4.0.6 - 2019-12-09
5153 This is the second stable release in the 0.4.0.x series. This release
5154 backports several bugfixes to improve stability and correctness. Anyone
5155 experiencing build problems or crashes with 0.4.0.5, including all relays
5156 relying on AccountingMax, should upgrade.
5158 Note that, per our support policy, support for the 0.4.0.x series will end
5159 on 2 Feb 2020. Anyone still running 0.4.0.x should plan to upgrade to the
5160 latest stable release, or downgrade to 0.3.5.x, which will get long-term
5161 support until 1 Feb 2022.
5163 o Directory authority changes (backport from 0.4.1.5):
5164 - The directory authority "dizum" has a new IP address. Closes
5167 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
5168 - Consider our directory information to have changed when our list
5169 of bridges changes. Previously, Tor would not re-compute the
5170 status of its directory information when bridges changed, and
5171 therefore would not realize that it was no longer able to build
5172 circuits. Fixes part of bug 29875.
5173 - Do not count previously configured working bridges towards our
5174 total of working bridges. Previously, when Tor's list of bridges
5175 changed, it would think that the old bridges were still usable,
5176 and delay fetching router descriptors for the new ones. Fixes part
5177 of bug 29875; bugfix on 0.3.0.1-alpha.
5179 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
5180 - When considering upgrading circuits from "waiting for guard" to
5181 "open", always ignore circuits that are marked for close. Otherwise,
5182 we can end up in the situation where a subsystem is notified that
5183 a closing circuit has just opened, leading to undesirable
5184 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
5186 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
5187 - Properly clean up the introduction point map when circuits change
5188 purpose from onion service circuits to pathbias, measurement, or
5189 other circuit types. This should fix some service-side instances
5190 of introduction point failure. Fixes bug 29034; bugfix
5193 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
5194 - Fix an unreachable bug in which an introduction point could try to
5195 send an INTRODUCE_ACK with a status code that Trunnel would refuse
5196 to encode, leading the relay to assert(). We've consolidated the
5197 ABI values into Trunnel now. Fixes bug 30454; bugfix
5199 - Clients can now handle unknown status codes from INTRODUCE_ACK
5200 cells. (The NACK behavior will stay the same.) This will allow us
5201 to extend status codes in the future without breaking the normal
5202 client behavior. Fixes another part of bug 30454; bugfix
5205 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
5206 - Relays now respect their AccountingMax bandwidth again. When
5207 relays entered "soft" hibernation (which typically starts when
5208 we've hit 90% of our AccountingMax), we had stopped checking
5209 whether we should enter hard hibernation. Soft hibernation refuses
5210 new connections and new circuits, but the existing circuits can
5211 continue, meaning that relays could have exceeded their configured
5212 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
5214 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
5215 - Stop ignoring torrc options after an %include directive, when the
5216 included directory ends with a file that does not contain any
5217 config options (but does contain comments or whitespace). Fixes
5218 bug 31408; bugfix on 0.3.1.1-alpha.
5220 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
5221 - Onion services now always use the exact number of intro points
5222 configured with the HiddenServiceNumIntroductionPoints option (or
5223 fewer if nodes are excluded). Before, a service could sometimes
5224 pick more intro points than configured. Fixes bug 31548; bugfix
5227 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
5228 - Add a "--list-modules" command to print a list of which compile-
5229 time modules are enabled. Closes ticket 30452.
5231 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
5232 - Remove sudo configuration lines from .travis.yml as they are no
5233 longer needed with current Travis build environment. Resolves
5236 o Minor features (continuous integration, backport from 0.4.1.4-rc):
5237 - Our Travis configuration now uses Chutney to run some network
5238 integration tests automatically. Closes ticket 29280.
5240 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
5241 - When building on Appveyor and Travis, pass the "-k" flag to make,
5242 so that we are informed of all compilation failures, not just the
5243 first one or two. Closes ticket 31372.
5245 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
5246 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
5247 in December 2018 (of which ~122 were still functional), with a
5248 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
5249 in June 2019. Closes ticket 28795.
5251 o Minor features (geoip, backport from 0.4.2.5):
5252 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
5253 Country database. Closes ticket 32685.
5255 o Minor features (stem tests, backport from 0.4.2.1-alpha):
5256 - Change "make test-stem" so it only runs the stem tests that use
5257 tor. This change makes test-stem faster and more reliable. Closes
5260 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
5261 - Avoid spurious errors when Appveyor CI fails before the install step.
5262 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
5264 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
5265 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
5266 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
5268 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
5269 - Fix a logic error that prevented the SessionGroup sub-option from
5270 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
5272 o Minor bugfixes (circuit padding, backport from 0.4.1.4-rc):
5273 - On relays, properly check that a padding machine is absent before
5274 logging a warning about it being absent. Fixes bug 30649; bugfix
5277 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
5278 - Fix a BUG() assertion that occurs within a very small race window
5279 between when a client intro circuit opens and when its descriptor
5280 gets cleaned up from the cache. The circuit is now closed early,
5281 which will trigger a re-fetch of the descriptor and continue the
5282 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
5284 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
5285 - Don't believe clock skew results from NETINFO cells that appear to
5286 arrive before we sent the VERSIONS cells they are responding to.
5287 Previously, we would accept them up to 3 minutes "in the past".
5288 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5290 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
5291 - Fix a compilation warning on Windows about casting a function
5292 pointer for GetTickCount64(). Fixes bug 31374; bugfix
5295 o Minor bugfixes (compilation, backport from 0.4.1.5):
5296 - Avoid using labs() on time_t, which can cause compilation warnings
5297 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5299 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
5300 - Suppress spurious float-conversion warnings from GCC when calling
5301 floating-point classifier functions on FreeBSD. Fixes part of bug
5302 31687; bugfix on 0.3.1.5-alpha.
5304 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
5305 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
5306 due to missing declarations of abort(), and prevent other such
5307 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
5309 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
5310 - Fix a bug that prevented us from supporting SOCKS5 proxies that
5311 want authentication along with configured (but unused!)
5312 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
5314 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
5315 - Avoid trying to read data from closed connections, which can cause
5316 needless loops in Libevent and infinite loops in Shadow. Fixes bug
5317 30344; bugfix on 0.1.1.1-alpha.
5319 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
5320 - Allow the test-stem job to fail in Travis, because it sometimes
5321 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
5322 - Skip test_rebind on macOS in Travis, because it is unreliable on
5323 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5324 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
5325 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5327 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
5328 - Avoid a set of possible code paths that could try to use freed
5329 memory in routerlist_free() while Tor was exiting. Fixes bug
5330 31003; bugfix on 0.1.2.2-alpha.
5332 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
5333 - Stop crashing after parsing an unknown descriptor purpose
5334 annotation. We think this bug can only be triggered by modifying a
5335 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
5337 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
5338 - Move the "bandwidth-file-headers" line in directory authority
5339 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
5342 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
5343 - On abort, try harder to flush the output buffers of log messages.
5344 On some platforms (macOS), log messages could be discarded when
5345 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5346 - Report the tor version whenever an assertion fails. Previously, we
5347 only reported the Tor version on some crashes, and some non-fatal
5348 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5350 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
5351 - When extracting an IPv6 address from a PF-based proxy, verify that
5352 we are actually configured to receive an IPv6 address, and log an
5353 internal error if not. Fixes part of bug 31687; bugfix
5356 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
5357 - When tor is missing descriptors for some primary entry guards,
5358 make the log message less alarming. It's normal for descriptors to
5359 expire, as long as tor fetches new ones soon after. Fixes bug
5360 31657; bugfix on 0.3.3.1-alpha.
5362 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
5363 - Do not log a warning when running with an OpenSSL version other
5364 than the one Tor was compiled with, if the two versions should be
5365 compatible. Previously, we would warn whenever the version was
5366 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
5368 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
5369 - Change log level of message "Hash of session info was not as
5370 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
5373 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
5374 - Rate-limit the logging message about the obsolete .exit
5375 notation. Previously, there was no limit on this warning, which
5376 could potentially be triggered many times by a hostile website.
5377 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
5379 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
5380 - Do not log a nonfatal assertion failure when receiving a VERSIONS
5381 cell on a connection using the obsolete v1 link protocol. Log a
5382 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
5384 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
5385 - Reset the periodic events' "enabled" flag when Tor is shut down
5386 cleanly. Previously, this flag was left on, which caused periodic
5387 events not to be re-enabled when Tor was relaunched in-process
5388 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5391 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
5392 - Avoid a minor memory leak that could occur on relays when failing
5393 to create a "keys" directory. Fixes bug 30148; bugfix
5396 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
5397 - Fix a trivial memory leak when parsing an invalid value
5398 from a download schedule in the configuration. Fixes bug
5399 30894; bugfix on 0.3.4.1-alpha.
5401 o Minor bugfixes (NetBSD, backport from 0.4.1.2-alpha):
5402 - Fix usage of minherit() on NetBSD and other platforms that define
5403 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
5404 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
5406 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
5407 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
5408 implementation) when failing to load an onion service client
5409 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
5411 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
5412 - When purging the DNS cache because of an out-of-memory condition,
5413 try purging just the older entries at first. Previously, we would
5414 always purge the whole thing. Fixes bug 29617; bugfix
5417 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
5418 - Avoid crashing in our tor_vasprintf() implementation on systems
5419 that define neither vasprintf() nor _vscprintf(). (This bug has
5420 been here long enough that we question whether people are running
5421 Tor on such systems, but we're applying the fix out of caution.)
5422 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
5425 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
5426 - Remove overly strict assertions that triggered when a pluggable
5427 transport failed to launch. Fixes bug 31091; bugfix
5429 - Remove an assertion in the Unix process backend. This assertion
5430 would trigger when we failed to find the executable for a child
5431 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
5433 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
5434 - Avoid crashing when starting with a corrupt keys directory where
5435 the old ntor key and the new ntor key are identical. Fixes bug
5436 30916; bugfix on 0.2.4.8-alpha.
5438 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
5439 - Correctly exclude a redundant rust build job in Travis. Fixes bug
5440 31463; bugfix on 0.3.5.4-alpha.
5442 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
5443 - When testing port rebinding, don't busy-wait for tor to log.
5444 Instead, actually sleep for a short time before polling again.
5445 Also improve the formatting of control commands and log messages.
5446 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5448 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
5449 - Log bugs about the TLS read buffer's length only once, rather than
5450 filling the logs with similar warnings. Fixes bug 31939; bugfix
5453 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
5454 - Always retry v2 single onion service intro and rend circuits with
5455 a 3-hop path. Previously, v2 single onion services used a 3-hop
5456 path when rendezvous circuits were retried after a remote or
5457 delayed failure, but a 1-hop path for immediate retries. Fixes bug
5458 23818; bugfix on 0.2.9.3-alpha.
5459 - Make v3 single onion services fall back to a 3-hop intro, when all
5460 intro points are unreachable via a 1-hop path. Previously, v3
5461 single onion services failed when all intro nodes were unreachable
5462 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
5464 o Documentation (backport from 0.4.2.1-alpha):
5465 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
5466 notice.html so that operators no longer have to host it
5467 themselves. Closes ticket 31089.
5469 o Testing (backport from 0.4.1.2-alpha):
5470 - Specify torrc paths (with empty files) when launching tor in
5471 integration tests; refrain from reading user and system torrcs.
5472 Resolves issue 29702.
5474 o Testing (continuous integration, backport from 0.4.1.1-alpha):
5475 - In Travis, show stem's tor log after failure. Closes ticket 30234.
5477 o Testing (continuous integration, backport from 0.4.1.5):
5478 - In Travis, make stem log a controller trace to the console, and
5479 tail stem's tor log after failure. Closes ticket 30591.
5480 - In Travis, only run the stem tests that use a tor binary. Closes
5483 o Testing (continuous integration, backport from 0.4.2.3-alpha):
5484 - Disable all but one Travis CI macOS build, to mitigate slow
5485 scheduling of Travis macOS jobs. Closes ticket 32177.
5486 - Run the chutney IPv6 networks as part of Travis CI. Closes
5488 - Simplify the Travis CI build matrix, and optimise for build time.
5489 Closes ticket 31859.
5490 - Use Windows Server 2019 instead of Windows Server 2016 in our
5491 Appveyor builds. Closes ticket 32086.
5493 o Testing (continuous integration, backport from 0.4.2.4-rc):
5494 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5495 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5496 until we can fix some Bionic permissions issues (see ticket
5497 32240). Related to ticket 31919.
5498 - Install the mingw OpenSSL package in Appveyor. This makes sure
5499 that the OpenSSL headers and libraries match in Tor's Appveyor
5500 builds. (This bug was triggered by an Appveyor image update.)
5501 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5502 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5504 o Testing (continuous integration, backport from 0.4.2.5):
5505 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
5506 extensions. Also activates clang's -Wtypedef-redefinition warnings.
5507 Build some jobs with -std=gnu99, and some jobs without.
5508 Closes ticket 32500.
5510 Changes in version 0.3.5.9 - 2019-12-09
5511 Tor 0.3.5.9 backports serveral fixes from later releases, including
5512 several that affect bridge users, relay stability, onion services,
5515 o Directory authority changes (backport from 0.4.1.5):
5516 - The directory authority "dizum" has a new IP address. Closes
5519 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
5520 - Consider our directory information to have changed when our list
5521 of bridges changes. Previously, Tor would not re-compute the
5522 status of its directory information when bridges changed, and
5523 therefore would not realize that it was no longer able to build
5524 circuits. Fixes part of bug 29875.
5525 - Do not count previously configured working bridges towards our
5526 total of working bridges. Previously, when Tor's list of bridges
5527 changed, it would think that the old bridges were still usable,
5528 and delay fetching router descriptors for the new ones. Fixes part
5529 of bug 29875; bugfix on 0.3.0.1-alpha.
5531 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
5532 - When considering upgrading circuits from "waiting for guard" to
5533 "open", always ignore circuits that are marked for close. Otherwise,
5534 we can end up in the situation where a subsystem is notified that
5535 a closing circuit has just opened, leading to undesirable
5536 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
5538 o Major bugfixes (NSS, relay, backport from 0.4.0.4-rc):
5539 - When running with NSS, disable TLS 1.2 ciphersuites that use
5540 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
5541 these ciphersuites don't work -- which caused relays to fail to
5542 handshake with one another when these ciphersuites were enabled.
5543 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
5545 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
5546 - Properly clean up the introduction point map when circuits change
5547 purpose from onion service circuits to pathbias, measurement, or
5548 other circuit types. This should fix some service-side instances
5549 of introduction point failure. Fixes bug 29034; bugfix
5552 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
5553 - Fix an unreachable bug in which an introduction point could try to
5554 send an INTRODUCE_ACK with a status code that Trunnel would refuse
5555 to encode, leading the relay to assert(). We've consolidated the
5556 ABI values into Trunnel now. Fixes bug 30454; bugfix
5558 - Clients can now handle unknown status codes from INTRODUCE_ACK
5559 cells. (The NACK behavior will stay the same.) This will allow us
5560 to extend status codes in the future without breaking the normal
5561 client behavior. Fixes another part of bug 30454; bugfix
5564 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
5565 - Stop ignoring torrc options after an %include directive, when the
5566 included directory ends with a file that does not contain any
5567 config options (but does contain comments or whitespace). Fixes
5568 bug 31408; bugfix on 0.3.1.1-alpha.
5570 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
5571 - Onion services now always use the exact number of intro points
5572 configured with the HiddenServiceNumIntroductionPoints option (or
5573 fewer if nodes are excluded). Before, a service could sometimes
5574 pick more intro points than configured. Fixes bug 31548; bugfix
5577 o Minor features (address selection, backport from 0.4.0.3-alpha):
5578 - Treat the subnet 100.64.0.0/10 as public for some purposes;
5579 private for others. This subnet is the RFC 6598 (Carrier Grade
5580 NAT) IP range, and is deployed by many ISPs as an alternative to
5581 RFC 1918 that does not break existing internal networks. Tor now
5582 blocks SOCKS and control ports on these addresses and warns users
5583 if client ports or ExtORPorts are listening on a RFC 6598 address.
5584 Closes ticket 28525. Patch by Neel Chauhan.
5586 o Minor features (bandwidth authority, backport from 0.4.0.4-rc):
5587 - Make bandwidth authorities ignore relays that are reported in the
5588 bandwidth file with the flag "vote=0". This change allows us to
5589 report unmeasured relays for diagnostic reasons without including
5590 their bandwidth in the bandwidth authorities' vote. Closes
5593 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
5594 - Add a "--list-modules" command to print a list of which compile-
5595 time modules are enabled. Closes ticket 30452.
5597 o Minor features (continuous integration, backport from 0.4.0.4-rc):
5598 - On Travis Rust builds, cleanup Rust registry and refrain from
5599 caching the "target/" directory to speed up builds. Resolves
5602 o Minor features (continuous integration, backport from 0.4.0.5):
5603 - In Travis, tell timelimit to use stem's backtrace signals, and
5604 launch python directly from timelimit, so python receives the
5605 signals from timelimit, rather than make. Closes ticket 30117.
5607 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
5608 - Remove sudo configuration lines from .travis.yml as they are no
5609 longer needed with current Travis build environment. Resolves
5612 o Minor features (continuous integration, backport from 0.4.1.4-rc):
5613 - Our Travis configuration now uses Chutney to run some network
5614 integration tests automatically. Closes ticket 29280.
5616 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
5617 - When building on Appveyor and Travis, pass the "-k" flag to make,
5618 so that we are informed of all compilation failures, not just the
5619 first one or two. Closes ticket 31372.
5621 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
5622 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
5623 in December 2018 (of which ~122 were still functional), with a
5624 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
5625 in June 2019. Closes ticket 28795.
5627 o Minor features (geoip, backport from 0.4.2.5):
5628 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
5629 Country database. Closes ticket 32685.
5631 o Minor features (NSS, diagnostic, backport from 0.4.0.4-rc):
5632 - Try to log an error from NSS (if there is any) and a more useful
5633 description of our situation if we are using NSS and a call to
5634 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
5636 o Minor features (stem tests, backport from 0.4.2.1-alpha):
5637 - Change "make test-stem" so it only runs the stem tests that use
5638 tor. This change makes test-stem faster and more reliable. Closes
5641 o Minor bugfixes (security, backport from 0.4.0.4-rc):
5642 - Verify in more places that we are not about to create a buffer
5643 with more than INT_MAX bytes, to avoid possible OOB access in the
5644 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
5645 fixed by Tobias Stoeckmann.
5646 - Fix a potential double free bug when reading huge bandwidth files.
5647 The issue is not exploitable in the current Tor network because
5648 the vulnerable code is only reached when directory authorities
5649 read bandwidth files, but bandwidth files come from a trusted
5650 source (usually the authorities themselves). Furthermore, the
5651 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
5652 which are not used by any of the current authorities. Fixes bug
5653 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
5656 o Minor bugfix (continuous integration, backport from 0.4.0.4-rc):
5657 - Reset coverage state on disk after Travis CI has finished. This
5658 should prevent future coverage merge errors from causing the test
5659 suite for the "process" subsystem to fail. The process subsystem
5660 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
5662 - Terminate test-stem if it takes more than 9.5 minutes to run.
5663 (Travis terminates the job after 10 minutes of no output.)
5664 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
5666 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
5667 - Avoid spurious errors when Appveyor CI fails before the install step.
5668 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
5670 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
5671 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
5672 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
5674 o Minor bugfixes (C correctness, backport from 0.4.0.4-rc):
5675 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
5676 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
5679 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
5680 - Fix a logic error that prevented the SessionGroup sub-option from
5681 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
5683 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
5684 - Fix a BUG() assertion that occurs within a very small race window
5685 between when a client intro circuit opens and when its descriptor
5686 gets cleaned up from the cache. The circuit is now closed early,
5687 which will trigger a re-fetch of the descriptor and continue the
5688 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
5690 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
5691 - Don't believe clock skew results from NETINFO cells that appear to
5692 arrive before we sent the VERSIONS cells they are responding to.
5693 Previously, we would accept them up to 3 minutes "in the past".
5694 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5696 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
5697 - Fix a compilation warning on Windows about casting a function
5698 pointer for GetTickCount64(). Fixes bug 31374; bugfix
5701 o Minor bugfixes (compilation, backport from 0.4.0.2-alpha):
5702 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
5703 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
5705 o Minor bugfixes (compilation, backport from 0.4.1.5):
5706 - Avoid using labs() on time_t, which can cause compilation warnings
5707 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5709 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
5710 - Suppress spurious float-conversion warnings from GCC when calling
5711 floating-point classifier functions on FreeBSD. Fixes part of bug
5712 31687; bugfix on 0.3.1.5-alpha.
5714 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
5715 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
5716 due to missing declarations of abort(), and prevent other such
5717 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
5719 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
5720 - Fix a bug that prevented us from supporting SOCKS5 proxies that
5721 want authentication along with configured (but unused!)
5722 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
5724 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
5725 - Avoid trying to read data from closed connections, which can cause
5726 needless loops in Libevent and infinite loops in Shadow. Fixes bug
5727 30344; bugfix on 0.1.1.1-alpha.
5729 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
5730 - Allow the test-stem job to fail in Travis, because it sometimes
5731 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
5732 - Skip test_rebind on macOS in Travis, because it is unreliable on
5733 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5734 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
5735 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5737 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
5738 - Avoid a set of possible code paths that could try to use freed
5739 memory in routerlist_free() while Tor was exiting. Fixes bug
5740 31003; bugfix on 0.1.2.2-alpha.
5742 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
5743 - Stop crashing after parsing an unknown descriptor purpose
5744 annotation. We think this bug can only be triggered by modifying a
5745 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
5747 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
5748 - Move the "bandwidth-file-headers" line in directory authority
5749 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
5752 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
5753 - On abort, try harder to flush the output buffers of log messages.
5754 On some platforms (macOS), log messages could be discarded when
5755 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5756 - Report the tor version whenever an assertion fails. Previously, we
5757 only reported the Tor version on some crashes, and some non-fatal
5758 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5760 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
5761 - When extracting an IPv6 address from a PF-based proxy, verify that
5762 we are actually configured to receive an IPv6 address, and log an
5763 internal error if not. Fixes part of bug 31687; bugfix
5766 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
5767 - When tor is missing descriptors for some primary entry guards,
5768 make the log message less alarming. It's normal for descriptors to
5769 expire, as long as tor fetches new ones soon after. Fixes bug
5770 31657; bugfix on 0.3.3.1-alpha.
5772 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
5773 - Avoid logging that we are relaxing a circuit timeout when that
5774 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
5776 o Minor bugfixes (logging, backport from 0.4.0.3-alpha):
5777 - Correct a misleading error message when IPv4Only or IPv6Only is
5778 used but the resolved address can not be interpreted as an address
5779 of the specified IP version. Fixes bug 13221; bugfix on
5780 0.2.3.9-alpha. Patch from Kris Katterjohn.
5781 - Log the correct port number for listening sockets when "auto" is
5782 used to let Tor pick the port number. Previously, port 0 was
5783 logged instead of the actual port number. Fixes bug 29144; bugfix
5784 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
5785 - Stop logging a BUG() warning when Tor is waiting for exit
5786 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
5788 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
5789 - Do not log a warning when running with an OpenSSL version other
5790 than the one Tor was compiled with, if the two versions should be
5791 compatible. Previously, we would warn whenever the version was
5792 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
5794 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
5795 - Change log level of message "Hash of session info was not as
5796 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
5799 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
5800 - Rate-limit the logging message about the obsolete .exit
5801 notation. Previously, there was no limit on this warning, which
5802 could potentially be triggered many times by a hostile website.
5803 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
5805 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
5806 - Do not log a nonfatal assertion failure when receiving a VERSIONS
5807 cell on a connection using the obsolete v1 link protocol. Log a
5808 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
5810 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
5811 - Reset the periodic events' "enabled" flag when Tor is shut down
5812 cleanly. Previously, this flag was left on, which caused periodic
5813 events not to be re-enabled when Tor was relaunched in-process
5814 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5817 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
5818 - Avoid a minor memory leak that could occur on relays when failing
5819 to create a "keys" directory. Fixes bug 30148; bugfix
5822 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
5823 - Fix a trivial memory leak when parsing an invalid value
5824 from a download schedule in the configuration. Fixes bug
5825 30894; bugfix on 0.3.4.1-alpha.
5827 o Minor bugfixes (memory management, backport from 0.4.0.3-alpha):
5828 - Refactor the shared random state's memory management so that it
5829 actually takes ownership of the shared random value pointers.
5830 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
5832 o Minor bugfixes (memory management, testing, backport from 0.4.0.3-alpha):
5833 - Stop leaking parts of the shared random state in the shared-random
5834 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
5836 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
5837 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
5838 implementation) when failing to load an onion service client
5839 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
5841 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
5842 - When purging the DNS cache because of an out-of-memory condition,
5843 try purging just the older entries at first. Previously, we would
5844 always purge the whole thing. Fixes bug 29617; bugfix
5847 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
5848 - Avoid crashing in our tor_vasprintf() implementation on systems
5849 that define neither vasprintf() nor _vscprintf(). (This bug has
5850 been here long enough that we question whether people are running
5851 Tor on such systems, but we're applying the fix out of caution.)
5852 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
5855 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
5856 - Avoid crashing when starting with a corrupt keys directory where
5857 the old ntor key and the new ntor key are identical. Fixes bug
5858 30916; bugfix on 0.2.4.8-alpha.
5860 o Minor bugfixes (rust, backport from 0.4.0.5):
5861 - Abort on panic in all build profiles, instead of potentially
5862 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
5864 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
5865 - Correctly exclude a redundant rust build job in Travis. Fixes bug
5866 31463; bugfix on 0.3.5.4-alpha.
5868 o Minor bugfixes (single onion services, backport from 0.4.0.3-alpha):
5869 - Allow connections to single onion services to remain idle without
5870 being disconnected. Previously, relays acting as rendezvous points
5871 for single onion services were mistakenly closing idle rendezvous
5872 circuits after 60 seconds, thinking that they were unused
5873 directory-fetching circuits that had served their purpose. Fixes
5874 bug 29665; bugfix on 0.2.1.26.
5876 o Minor bugfixes (stats, backport from 0.4.0.3-alpha):
5877 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
5878 relay and bridge extra-info documents. Fixes bug 29017; bugfix
5881 o Minor bugfixes (testing, backport from 0.4.0.3-alpha):
5882 - Downgrade some LOG_ERR messages in the address/* tests to
5883 warnings. The LOG_ERR messages were occurring when we had no
5884 configured network. We were failing the unit tests, because we
5885 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
5886 29530; bugfix on 0.3.5.8.
5887 - Fix our gcov wrapper script to look for object files at the
5888 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
5890 o Minor bugfixes (testing, backport from 0.4.0.4-rc):
5891 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
5892 recent test-network.sh to use new chutney features in CI. Fixes
5893 bug 29703; bugfix on 0.2.9.1-alpha.
5894 - Fix a test failure on Windows caused by an unexpected "BUG"
5895 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
5898 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
5899 - When testing port rebinding, don't busy-wait for tor to log.
5900 Instead, actually sleep for a short time before polling again.
5901 Also improve the formatting of control commands and log messages.
5902 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5904 o Minor bugfixes (TLS protocol, backport form 0.4.0.4-rc):
5905 - When classifying a client's selection of TLS ciphers, if the
5906 client ciphers are not yet available, do not cache the result.
5907 Previously, we had cached the unavailability of the cipher list
5908 and never looked again, which in turn led us to assume that the
5909 client only supported the ancient V1 link protocol. This, in turn,
5910 was causing Stem integration tests to stall in some cases. Fixes
5911 bug 30021; bugfix on 0.2.4.8-alpha.
5913 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
5914 - Log bugs about the TLS read buffer's length only once, rather than
5915 filling the logs with similar warnings. Fixes bug 31939; bugfix
5918 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
5919 - Always retry v2 single onion service intro and rend circuits with
5920 a 3-hop path. Previously, v2 single onion services used a 3-hop
5921 path when rendezvous circuits were retried after a remote or
5922 delayed failure, but a 1-hop path for immediate retries. Fixes bug
5923 23818; bugfix on 0.2.9.3-alpha.
5924 - Make v3 single onion services fall back to a 3-hop intro, when all
5925 intro points are unreachable via a 1-hop path. Previously, v3
5926 single onion services failed when all intro nodes were unreachable
5927 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
5929 o Minor bugfixes (Windows, CI, backport from 0.4.0.3-alpha):
5930 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
5931 Windows Server 2012 R2 job. The remaining 2 jobs still provide
5932 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
5933 fast_finish, so failed jobs terminate the build immediately. Fixes
5934 bug 29601; bugfix on 0.3.5.4-alpha.
5936 o Documentation (backport from 0.4.2.1-alpha):
5937 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
5938 notice.html so that operators no longer have to host it
5939 themselves. Closes ticket 31089.
5941 o Testing (backport from 0.4.1.2-alpha):
5942 - Specify torrc paths (with empty files) when launching tor in
5943 integration tests; refrain from reading user and system torrcs.
5944 Resolves issue 29702.
5946 o Testing (continuous integration, backport from 0.4.1.1-alpha):
5947 - In Travis, show stem's tor log after failure. Closes ticket 30234.
5949 o Testing (continuous integration, backport from 0.4.1.5):
5950 - In Travis, make stem log a controller trace to the console, and
5951 tail stem's tor log after failure. Closes ticket 30591.
5952 - In Travis, only run the stem tests that use a tor binary. Closes
5955 o Testing (continuous integration, backport from 0.4.2.3-alpha):
5956 - Disable all but one Travis CI macOS build, to mitigate slow
5957 scheduling of Travis macOS jobs. Closes ticket 32177.
5958 - Run the chutney IPv6 networks as part of Travis CI. Closes
5960 - Simplify the Travis CI build matrix, and optimise for build time.
5961 Closes ticket 31859.
5962 - Use Windows Server 2019 instead of Windows Server 2016 in our
5963 Appveyor builds. Closes ticket 32086.
5965 o Testing (continuous integration, backport from 0.4.2.4-rc):
5966 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5967 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5968 until we can fix some Bionic permissions issues (see ticket
5969 32240). Related to ticket 31919.
5970 - Install the mingw OpenSSL package in Appveyor. This makes sure
5971 that the OpenSSL headers and libraries match in Tor's Appveyor
5972 builds. (This bug was triggered by an Appveyor image update.)
5973 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5974 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5976 o Testing (continuous integration, backport from 0.4.2.5):
5977 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
5978 extensions. Also activates clang's -Wtypedef-redefinition warnings.
5979 Build some jobs with -std=gnu99, and some jobs without.
5980 Closes ticket 32500.
5982 Changes in version 0.4.2.4-rc - 2019-11-15
5983 Tor 0.4.2.4-rc is the first release candidate in its series. It fixes
5984 several bugs from earlier versions, including a few that would result in
5985 stack traces or incorrect behavior.
5987 o Minor features (build system):
5988 - Make pkg-config use --prefix when cross-compiling, if
5989 PKG_CONFIG_PATH is not set. Closes ticket 32191.
5991 o Minor features (geoip):
5992 - Update geoip and geoip6 to the November 6 2019 Maxmind GeoLite2
5993 Country database. Closes ticket 32440.
5995 o Minor bugfixes (client, onion service v3):
5996 - Fix a BUG() assertion that occurs within a very small race window
5997 between when a client intro circuit opens and when its descriptor
5998 gets cleaned up from the cache. The circuit is now closed early,
5999 which will trigger a re-fetch of the descriptor and continue the
6000 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
6002 o Minor bugfixes (code quality):
6003 - Fix "make check-includes" so it runs correctly on out-of-tree
6004 builds. Fixes bug 31335; bugfix on 0.3.5.1-alpha.
6006 o Minor bugfixes (configuration):
6007 - Log the option name when skipping an obsolete option. Fixes bug
6008 32295; bugfix on 0.4.2.1-alpha.
6010 o Minor bugfixes (crash):
6011 - When running Tor with an option like --verify-config or
6012 --dump-config that does not start the event loop, avoid crashing
6013 if we try to exit early because of an error. Fixes bug 32407;
6014 bugfix on 0.3.3.1-alpha.
6016 o Minor bugfixes (directory):
6017 - When checking if a directory connection is anonymous, test if the
6018 circuit was marked for close before looking at its channel. This
6019 avoids a BUG() stacktrace if the circuit was previously closed.
6020 Fixes bug 31958; bugfix on 0.4.2.1-alpha.
6022 o Minor bugfixes (shellcheck):
6023 - Fix minor shellcheck errors in the git-*.sh scripts. Fixes bug
6024 32402; bugfix on 0.4.2.1-alpha.
6025 - Start checking most scripts for shellcheck errors again. Fixes bug
6026 32402; bugfix on 0.4.2.1-alpha.
6028 o Testing (continuous integration):
6029 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
6030 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
6031 until we can fix some Bionic permissions issues (see ticket
6032 32240). Related to ticket 31919.
6033 - Install the mingw OpenSSL package in Appveyor. This makes sure
6034 that the OpenSSL headers and libraries match in Tor's Appveyor
6035 builds. (This bug was triggered by an Appveyor image update.)
6036 Fixes bug 32449; bugfix on 0.3.5.6-rc.
6037 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
6040 Changes in version 0.4.2.3-alpha - 2019-10-24
6041 This release fixes several bugs from the previous alpha release, and
6042 from earlier versions of Tor.
6044 o Major bugfixes (relay):
6045 - Relays now respect their AccountingMax bandwidth again. When
6046 relays entered "soft" hibernation (which typically starts when
6047 we've hit 90% of our AccountingMax), we had stopped checking
6048 whether we should enter hard hibernation. Soft hibernation refuses
6049 new connections and new circuits, but the existing circuits can
6050 continue, meaning that relays could have exceeded their configured
6051 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
6053 o Major bugfixes (v3 onion services):
6054 - Onion services now always use the exact number of intro points
6055 configured with the HiddenServiceNumIntroductionPoints option (or
6056 fewer if nodes are excluded). Before, a service could sometimes
6057 pick more intro points than configured. Fixes bug 31548; bugfix
6060 o Minor feature (onion services, control port):
6061 - The ADD_ONION command's keyword "BEST" now defaults to ED25519-V3
6062 (v3) onion services. Previously it defaulted to RSA1024 (v2).
6063 Closes ticket 29669.
6065 o Minor features (testing):
6066 - When running tests that attempt to look up hostnames, replace the
6067 libc name lookup functions with ones that do not actually touch
6068 the network. This way, the tests complete more quickly in the
6069 presence of a slow or missing DNS resolver. Closes ticket 31841.
6071 o Minor features (testing, continuous integration):
6072 - Disable all but one Travis CI macOS build, to mitigate slow
6073 scheduling of Travis macOS jobs. Closes ticket 32177.
6074 - Run the chutney IPv6 networks as part of Travis CI. Closes
6076 - Simplify the Travis CI build matrix, and optimise for build time.
6077 Closes ticket 31859.
6078 - Use Windows Server 2019 instead of Windows Server 2016 in our
6079 Appveyor builds. Closes ticket 32086.
6081 o Minor bugfixes (build system):
6082 - Interpret "--disable-module-dirauth=no" correctly. Fixes bug
6083 32124; bugfix on 0.3.4.1-alpha.
6084 - Interpret "--with-tcmalloc=no" correctly. Fixes bug 32124; bugfix
6086 - Stop failing when jemalloc is requested, but tcmalloc is not
6087 found. Fixes bug 32124; bugfix on 0.3.5.1-alpha.
6088 - When pkg-config is not installed, or a library that depends on
6089 pkg-config is not found, tell the user what to do to fix the
6090 problem. Fixes bug 31922; bugfix on 0.3.1.1-alpha.
6092 o Minor bugfixes (connections):
6093 - Avoid trying to read data from closed connections, which can cause
6094 needless loops in Libevent and infinite loops in Shadow. Fixes bug
6095 30344; bugfix on 0.1.1.1-alpha.
6097 o Minor bugfixes (error handling):
6098 - Always lock the backtrace buffer before it is used. Fixes bug
6099 31734; bugfix on 0.2.5.3-alpha.
6101 o Minor bugfixes (mainloop, periodic events, in-process API):
6102 - Reset the periodic events' "enabled" flag when Tor is shut down
6103 cleanly. Previously, this flag was left on, which caused periodic
6104 events not to be re-enabled when Tor was relaunched in-process
6105 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
6108 o Minor bugfixes (process management):
6109 - Remove overly strict assertions that triggered when a pluggable
6110 transport failed to launch. Fixes bug 31091; bugfix
6112 - Remove an assertion in the Unix process backend. This assertion
6113 would trigger when we failed to find the executable for a child
6114 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
6116 o Minor bugfixes (testing):
6117 - Avoid intermittent test failures due to a test that had relied on
6118 inconsistent timing sources. Fixes bug 31995; bugfix
6120 - When testing port rebinding, don't busy-wait for tor to log.
6121 Instead, actually sleep for a short time before polling again.
6122 Also improve the formatting of control commands and log messages.
6123 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
6125 o Minor bugfixes (tls, logging):
6126 - Log bugs about the TLS read buffer's length only once, rather than
6127 filling the logs with similar warnings. Fixes bug 31939; bugfix
6130 o Minor bugfixes (v3 onion services):
6131 - Fix an implicit conversion from ssize_t to size_t discovered by
6132 Coverity. Fixes bug 31682; bugfix on 0.4.2.1-alpha.
6133 - Fix a memory leak in an unlikely error code path when encoding HS
6134 DoS establish intro extension cell. Fixes bug 32063; bugfix
6136 - When cleaning up intro circuits for a v3 onion service, don't
6137 remove circuits that have an established or pending circuit, even
6138 if they ran out of retries. This way, we don't remove a circuit on
6139 its last retry. Fixes bug 31652; bugfix on 0.3.2.1-alpha.
6142 - Correct the description of "GuardLifetime". Fixes bug 31189;
6143 bugfix on 0.3.0.1-alpha.
6144 - Make clear in the man page, in both the bandwidth section and the
6145 AccountingMax section, that Tor counts in powers of two, not
6146 powers of ten: 1 GByte is 1024*1024*1024 bytes, not one billion
6147 bytes. Resolves ticket 32106.
6150 Changes in version 0.4.2.2-alpha - 2019-10-07
6151 This release fixes several bugs from the previous alpha release, and
6152 from earlier versions. It also includes a change in authorities, so
6153 that they begin to reject the currently unsupported release series.
6155 o Major features (directory authorities):
6156 - Directory authorities now reject relays running all currently
6157 deprecated release series. The currently supported release series
6158 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
6160 o Major bugfixes (embedded Tor):
6161 - Avoid a possible crash when restarting Tor in embedded mode and
6162 enabling a different set of publish/subscribe messages. Fixes bug
6163 31898; bugfix on 0.4.1.1-alpha.
6165 o Major bugfixes (torrc parsing):
6166 - Stop ignoring torrc options after an %include directive, when the
6167 included directory ends with a file that does not contain any
6168 config options (but does contain comments or whitespace). Fixes
6169 bug 31408; bugfix on 0.3.1.1-alpha.
6171 o Minor features (auto-formatting scripts):
6172 - When annotating C macros, never generate a line that our check-
6173 spaces script would reject. Closes ticket 31759.
6174 - When annotating C macros, try to remove cases of double-negation.
6175 Closes ticket 31779.
6177 o Minor features (continuous integration):
6178 - When building on Appveyor and Travis, pass the "-k" flag to make,
6179 so that we are informed of all compilation failures, not just the
6180 first one or two. Closes ticket 31372.
6182 o Minor features (geoip):
6183 - Update geoip and geoip6 to the October 1 2019 Maxmind GeoLite2
6184 Country database. Closes ticket 31931.
6186 o Minor features (maintenance scripts):
6187 - Add a Coccinelle script to detect bugs caused by incrementing or
6188 decrementing a variable inside a call to log_debug(). Since
6189 log_debug() is a macro whose arguments are conditionally
6190 evaluated, it is usually an error to do this. One such bug was
6191 30628, in which SENDME cells were miscounted by a decrement
6192 operator inside a log_debug() call. Closes ticket 30743.
6194 o Minor features (onion services v3):
6195 - Assist users who try to setup v2 client authorization in v3 onion
6196 services by pointing them to the right documentation. Closes
6199 o Minor bugfixes (Appveyor continuous integration):
6200 - Avoid spurious errors when Appveyor CI fails before the install
6201 step. Fixes bug 31884; bugfix on 0.3.4.2-alpha.
6203 o Minor bugfixes (best practices tracker):
6204 - When listing overbroad exceptions, do not also list problems, and
6205 do not list insufficiently broad exceptions. Fixes bug 31338;
6206 bugfix on 0.4.2.1-alpha.
6208 o Minor bugfixes (controller protocol):
6209 - Fix the MAPADDRESS controller command to accept one or more
6210 arguments. Previously, it required two or more arguments, and
6211 ignored the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
6213 o Minor bugfixes (logging):
6214 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
6215 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
6216 - Disable backtrace signal handlers when shutting down tor. Fixes
6217 bug 31614; bugfix on 0.2.5.2-alpha.
6218 - Rate-limit the logging message about the obsolete .exit
6219 notation. Previously, there was no limit on this warning, which
6220 could potentially be triggered many times by a hostile website.
6221 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
6222 - When initialising log domain masks, only set known log domains.
6223 Fixes bug 31854; bugfix on 0.2.1.1-alpha.
6225 o Minor bugfixes (logging, protocol violations):
6226 - Do not log a nonfatal assertion failure when receiving a VERSIONS
6227 cell on a connection using the obsolete v1 link protocol. Log a
6228 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
6230 o Minor bugfixes (modules):
6231 - Explain what the optional Directory Authority module is, and what
6232 happens when it is disabled. Fixes bug 31825; bugfix
6235 o Minor bugfixes (multithreading):
6236 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
6237 31736; bugfix on 0.0.7.
6239 o Minor bugfixes (relay):
6240 - Avoid crashing when starting with a corrupt keys directory where
6241 the old ntor key and the new ntor key are identical. Fixes bug
6242 30916; bugfix on 0.2.4.8-alpha.
6244 o Minor bugfixes (tests, SunOS):
6245 - Avoid a map_anon_nofork test failure due to a signed/unsigned
6246 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
6248 o Code simplification and refactoring:
6249 - Refactor connection_control_process_inbuf() to reduce the size of
6250 a practracker exception. Closes ticket 31840.
6251 - Refactor the microdescs_parse_from_string() function into smaller
6252 pieces, for better comprehensibility. Closes ticket 31675.
6253 - Use SEVERITY_MASK_IDX() to find the LOG_* mask indexes in the unit
6254 tests and fuzzers, rather than using hard-coded values. Closes
6256 - Interface for function `decrypt_desc_layer` cleaned up. Closes
6260 - Document the signal-safe logging behaviour in the tor man page.
6261 Also add some comments to the relevant functions. Closes
6263 - Explain why we can't destroy the backtrace buffer mutex. Explain
6264 why we don't need to destroy the log mutex. Closes ticket 31736.
6265 - The Tor source code repository now includes a (somewhat dated)
6266 description of Tor's modular architecture, in doc/HACKING/design.
6267 This is based on the old "tor-guts.git" repository, which we are
6268 adopting and superseding. Closes ticket 31849.
6271 Changes in version 0.4.1.6 - 2019-09-19
6272 This release backports several bugfixes to improve stability and
6273 correctness. Anyone experiencing build problems or crashes with 0.4.1.5,
6274 or experiencing reliability issues with single onion services, should
6277 o Major bugfixes (crash, Linux, Android, backport from 0.4.2.1-alpha):
6278 - Tolerate systems (including some Android installations) where
6279 madvise and MADV_DONTDUMP are available at build-time, but not at
6280 run time. Previously, these systems would notice a failed syscall
6281 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
6282 - Tolerate systems (including some Linux installations) where
6283 madvise and/or MADV_DONTFORK are available at build-time, but not
6284 at run time. Previously, these systems would notice a failed
6285 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
6287 o Minor features (stem tests, backport from 0.4.2.1-alpha):
6288 - Change "make test-stem" so it only runs the stem tests that use
6289 tor. This change makes test-stem faster and more reliable. Closes
6292 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
6293 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
6294 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
6296 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
6297 - Add more stub functions to fix compilation on Android with link-
6298 time optimization when --disable-module-dirauth is used.
6299 Previously, these compilation settings would make the compiler
6300 look for functions that didn't exist. Fixes bug 31552; bugfix
6302 - Suppress spurious float-conversion warnings from GCC when calling
6303 floating-point classifier functions on FreeBSD. Fixes part of bug
6304 31687; bugfix on 0.3.1.5-alpha.
6306 o Minor bugfixes (controller protocol):
6307 - Fix the MAPADDRESS controller command to accept one or more
6308 arguments. Previously, it required two or more arguments, and ignored
6309 the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
6311 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
6312 - When extracting an IPv6 address from a PF-based proxy, verify that
6313 we are actually configured to receive an IPv6 address, and log an
6314 internal error if not. Fixes part of bug 31687; bugfix
6317 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
6318 - When tor is missing descriptors for some primary entry guards,
6319 make the log message less alarming. It's normal for descriptors to
6320 expire, as long as tor fetches new ones soon after. Fixes bug
6321 31657; bugfix on 0.3.3.1-alpha.
6323 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
6324 - Change log level of message "Hash of session info was not as
6325 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
6328 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
6329 - Correctly exclude a redundant rust build job in Travis. Fixes bug
6330 31463; bugfix on 0.3.5.4-alpha.
6332 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
6333 - Always retry v2 single onion service intro and rend circuits with
6334 a 3-hop path. Previously, v2 single onion services used a 3-hop
6335 path when rendezvous circuits were retried after a remote or
6336 delayed failure, but a 1-hop path for immediate retries. Fixes bug
6337 23818; bugfix on 0.2.9.3-alpha.
6339 o Minor bugfixes (v3 single onion services, backport from 0.4.2.1-alpha):
6340 - Always retry v3 single onion service intro and rend circuits with
6341 a 3-hop path. Previously, v3 single onion services used a 3-hop
6342 path when rend circuits were retried after a remote or delayed
6343 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
6344 bugfix on 0.3.2.1-alpha.
6345 - Make v3 single onion services fall back to a 3-hop intro, when all
6346 intro points are unreachable via a 1-hop path. Previously, v3
6347 single onion services failed when all intro nodes were unreachable
6348 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
6350 o Documentation (backport from 0.4.2.1-alpha):
6351 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
6352 notice.html so that operators no longer have to host it
6353 themselves. Closes ticket 31089.
6356 Changes in version 0.4.2.1-alpha - 2019-09-17
6357 This is the first alpha release in the 0.4.2.x series. It adds new
6358 defenses for denial-of-service attacks against onion services. It also
6359 includes numerous kinds of bugfixes and refactoring to help improve
6360 Tor's stability and ease of development.
6362 o Major features (onion service v3, denial of service):
6363 - Add onion service introduction denial of service defenses. Intro
6364 points can now rate-limit client introduction requests, using
6365 parameters that can be sent by the service within the
6366 ESTABLISH_INTRO cell. If the cell extension for this is not used,
6367 the intro point will honor the consensus parameters. Closes
6370 o Major bugfixes (circuit build, guard):
6371 - When considering upgrading circuits from "waiting for guard" to
6372 "open", always ignore circuits that are marked for close.
6373 Previously we could end up in the situation where a subsystem is
6374 notified of a circuit opening, but the circuit is still marked for
6375 close, leading to undesirable behavior. Fixes bug 30871; bugfix
6378 o Major bugfixes (crash, Linux, Android):
6379 - Tolerate systems (including some Android installations) where
6380 madvise and MADV_DONTDUMP are available at build-time, but not at
6381 run time. Previously, these systems would notice a failed syscall
6382 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
6383 - Tolerate systems (including some Linux installations) where
6384 madvise and/or MADV_DONTFORK are available at build-time, but not
6385 at run time. Previously, these systems would notice a failed
6386 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
6388 o Minor features (best practices tracker):
6389 - Our best-practices tracker now integrates with our include-checker
6390 tool to keep track of how many layering violations we have not yet
6391 fixed. We hope to reduce this number over time to improve Tor's
6392 modularity. Closes ticket 31176.
6393 - Add a TOR_PRACTRACKER_OPTIONS variable for passing arguments to
6394 practracker from the environment. We may want this for continuous
6395 integration. Closes ticket 31309.
6396 - Give a warning rather than an error when a practracker exception
6397 is violated by a small amount, add a --list-overbroad option to
6398 practracker that lists exceptions that are stricter than they need
6399 to be, and provide an environment variable for disabling
6400 practracker. Closes ticket 30752.
6401 - Our best-practices tracker now looks at headers as well as C
6402 files. Closes ticket 31175.
6404 o Minor features (build system):
6405 - Add --disable-manpage and --disable-html-manual options to
6406 configure script. This will enable shortening build times by not
6407 building documentation. Resolves issue 19381.
6409 o Minor features (compilation):
6410 - Log a more useful error message when we are compiling and one of
6411 the compile-time hardening options we have selected can be linked
6412 but not executed. Closes ticket 27530.
6414 o Minor features (configuration):
6415 - The configuration code has been extended to allow splitting
6416 configuration data across multiple objects. Previously, all
6417 configuration data needed to be kept in a single object, which
6418 tended to become bloated. Closes ticket 31240.
6420 o Minor features (continuous integration):
6421 - When running CI builds on Travis, put some random data in
6422 ~/.torrc, to make sure no tests are reading the Tor configuration
6423 file from its default location. Resolves issue 30102.
6425 o Minor features (debugging):
6426 - Log a nonfatal assertion failure if we encounter a configuration
6427 line whose command is "CLEAR" but which has a nonempty value. This
6428 should be impossible, according to the rules of our configuration
6429 line parsing. Closes ticket 31529.
6431 o Minor features (git hooks):
6432 - Our pre-commit git hook now checks for a special file before
6433 running practracker, so that practracker only runs on branches
6434 that are based on master. Since the pre-push hook calls the pre-
6435 commit hook, practracker will also only run before pushes of
6436 branches based on master. Closes ticket 30979.
6438 o Minor features (git scripts):
6439 - Add a "--" command-line argument, to separate git-push-all.sh
6440 script arguments from arguments that are passed through to git
6441 push. Closes ticket 31314.
6442 - Add a -r <remote-name> argument to git-push-all.sh, so the script
6443 can push test branches to a personal remote. Closes ticket 31314.
6444 - Add a -t <test-branch-prefix> argument to git-merge-forward.sh and
6445 git-push-all.sh, which makes these scripts create, merge forward,
6446 and push test branches. Closes ticket 31314.
6447 - Add a -u argument to git-merge-forward.sh, so that the script can
6448 re-use existing test branches after a merge failure and fix.
6449 Closes ticket 31314.
6450 - Add a TOR_GIT_PUSH env var, which sets the default git push
6451 command and arguments for git-push-all.sh. Closes ticket 31314.
6452 - Add a TOR_PUSH_DELAY variable to git-push-all.sh, which makes the
6453 script push master and maint branches with a delay between each
6454 branch. These delays trigger the CI jobs in a set order, which
6455 should show the most likely failures first. Also make pushes
6456 atomic by default, and make the script pass any command-line
6457 arguments to git push. Closes ticket 29879.
6458 - Call the shellcheck script from the pre-commit hook. Closes
6460 - Skip pushing test branches that are the same as a remote
6461 maint/release/master branch in git-push-all.sh by default. Add a
6462 -s argument, so git-push-all.sh can push all test branches. Closes
6465 o Minor features (IPv6, logging):
6466 - Log IPv6 addresses as well as IPv4 addresses when describing
6467 routerinfos, routerstatuses, and nodes. Closes ticket 21003.
6469 o Minor features (onion service v3):
6470 - Do not allow single hop clients to fetch or post an HS descriptor
6471 from an HSDir. Closes ticket 24964.
6473 o Minor features (onion service):
6474 - Disallow single-hop clients at the introduction point. We've
6475 removed Tor2web support a while back and single-hop rendezvous
6476 attempts are blocked at the relays. This change should remove load
6477 off the network from spammy clients. Close ticket 24963.
6479 o Minor features (stem tests):
6480 - Change "make test-stem" so it only runs the stem tests that use
6481 tor. This change makes test-stem faster and more reliable. Closes
6484 o Minor features (testing):
6485 - Add a script to invoke "tor --dump-config" and "tor
6486 --verify-config" with various configuration options, and see
6487 whether tor's resulting configuration or error messages are what
6488 we expect. Use it for integration testing of our +Option and
6489 /Option flags. Closes ticket 31637.
6490 - Improve test coverage for our existing configuration parsing and
6491 management API. Closes ticket 30893.
6492 - Add integration tests to make sure that practracker gives the
6493 outputs we expect. Closes ticket 31477.
6494 - The practracker self-tests are now run as part of the Tor test
6495 suite. Closes ticket 31304.
6497 o Minor features (token bucket):
6498 - Implement a generic token bucket that uses a single counter, for
6499 use in anti-DoS onion service work. Closes ticket 30687.
6501 o Minor bugfixes (best practices tracker):
6502 - Fix a few issues in the best-practices script, including tests,
6503 tab tolerance, error reporting, and directory-exclusion logic.
6504 Fixes bug 29746; bugfix on 0.4.1.1-alpha.
6505 - When running check-best-practices, only consider files in the src
6506 subdirectory. Previously we had recursively considered all
6507 subdirectories, which made us get confused by the temporary
6508 directories made by "make distcheck". Fixes bug 31578; bugfix
6511 o Minor bugfixes (build system):
6512 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
6513 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
6515 o Minor bugfixes (chutney, makefiles, documentation):
6516 - "make test-network-all" now shows the warnings from each test-
6517 network.sh run on the console, so developers see new warnings
6518 early. We've also improved the documentation for this feature, and
6519 renamed a Makefile variable so the code is self-documenting. Fixes
6520 bug 30455; bugfix on 0.3.0.4-rc.
6522 o Minor bugfixes (compilation):
6523 - Add more stub functions to fix compilation on Android with link-
6524 time optimization when --disable-module-dirauth is used.
6525 Previously, these compilation settings would make the compiler
6526 look for functions that didn't exist. Fixes bug 31552; bugfix
6528 - Suppress spurious float-conversion warnings from GCC when calling
6529 floating-point classifier functions on FreeBSD. Fixes part of bug
6530 31687; bugfix on 0.3.1.5-alpha.
6532 o Minor bugfixes (configuration):
6533 - Invalid floating-point values in the configuration file are now
6534 treated as errors in the configuration. Previously, they were
6535 ignored and treated as zero. Fixes bug 31475; bugfix on 0.0.1.
6537 o Minor bugfixes (coverity):
6538 - Add an assertion when parsing a BEGIN cell so that coverity can be
6539 sure that we are not about to dereference a NULL address. Fixes
6540 bug 31026; bugfix on 0.2.4.7-alpha. This is CID 1447296.
6541 - In our siphash implementation, when building for coverity, use
6542 memcpy in place of a switch statement, so that coverity can tell
6543 we are not accessing out-of-bounds memory. Fixes bug 31025; bugfix
6544 on 0.2.8.1-alpha. This is tracked as CID 1447293 and 1447295.
6545 - Fix several coverity warnings from our unit tests. Fixes bug
6546 31030; bugfix on 0.2.4.1-alpha, 0.3.2.1-alpha, and 0.4.0.1-alpha.
6548 o Minor bugfixes (developer tooling):
6549 - Only log git script changes in the post-merge script when the
6550 merge was to the master branch. Fixes bug 31040; bugfix
6553 o Minor bugfixes (directory authorities):
6554 - Return a distinct status when formatting annotations fails. Fixes
6555 bug 30780; bugfix on 0.2.0.8-alpha.
6557 o Minor bugfixes (error handling):
6558 - On abort, try harder to flush the output buffers of log messages.
6559 On some platforms (macOS), log messages could be discarded when
6560 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
6561 - Report the tor version whenever an assertion fails. Previously, we
6562 only reported the Tor version on some crashes, and some non-fatal
6563 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
6564 - When tor aborts due to an error, close log file descriptors before
6565 aborting. Closing the logs makes some OSes flush log file buffers,
6566 rather than deleting buffered log lines. Fixes bug 31594; bugfix
6569 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6):
6570 - When extracting an IPv6 address from a PF-based proxy, verify that
6571 we are actually configured to receive an IPv6 address, and log an
6572 internal error if not. Fixes part of bug 31687; bugfix
6575 o Minor bugfixes (git hooks):
6576 - Remove a duplicate call to practracker from the pre-push hook. The
6577 pre-push hook already calls the pre-commit hook, which calls
6578 practracker. Fixes bug 31462; bugfix on 0.4.1.1-alpha.
6580 o Minor bugfixes (git scripts):
6581 - Stop hard-coding the bash path in the git scripts. Some OSes don't
6582 have bash in /usr/bin, others have an ancient bash at this path.
6583 Fixes bug 30840; bugfix on 0.4.0.1-alpha.
6584 - Stop hard-coding the tor master branch name and worktree path in
6585 the git scripts. Fixes bug 30841; bugfix on 0.4.0.1-alpha.
6586 - Allow git-push-all.sh to be run from any directory. Previously,
6587 the script only worked if run from an upstream worktree directory.
6588 Closes ticket 31678.
6590 o Minor bugfixes (guards):
6591 - When tor is missing descriptors for some primary entry guards,
6592 make the log message less alarming. It's normal for descriptors to
6593 expire, as long as tor fetches new ones soon after. Fixes bug
6594 31657; bugfix on 0.3.3.1-alpha.
6596 o Minor bugfixes (ipv6):
6597 - Check for private IPv6 addresses alongside their IPv4 equivalents
6598 when authorities check descriptors. Previously, we only checked
6599 for private IPv4 addresses. Fixes bug 31088; bugfix on
6600 0.2.3.21-rc. Patch by Neel Chauhan.
6601 - When parsing microdescriptors, we should check the IPv6 exit
6602 policy alongside IPv4. Previously, we checked both exit policies
6603 for only router info structures, while microdescriptors were
6604 IPv4-only. Fixes bug 27284; bugfix on 0.2.3.1-alpha. Patch by
6607 o Minor bugfixes (logging):
6608 - Change log level of message "Hash of session info was not as
6609 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
6611 - Fix a code issue that would have broken our parsing of log domains
6612 as soon as we had 33 of them. Fortunately, we still only have 29.
6613 Fixes bug 31451; bugfix on 0.4.1.4-rc.
6615 o Minor bugfixes (memory management):
6616 - Stop leaking a small amount of memory in nt_service_install(), in
6617 unreachable code. Fixes bug 30799; bugfix on 0.2.0.7-alpha. Patch
6620 o Minor bugfixes (networking, IP addresses):
6621 - When parsing addresses via Tor's internal DNS lookup API, reject
6622 IPv4 addresses in square brackets, and accept IPv6 addresses in
6623 square brackets. This change completes the work started in 23082,
6624 making address parsing consistent between tor's internal DNS
6625 lookup and address parsing APIs. Fixes bug 30721; bugfix
6627 - When parsing addresses via Tor's internal address:port parsing and
6628 DNS lookup APIs, require IPv6 addresses with ports to have square
6629 brackets. But allow IPv6 addresses without ports, whether or not
6630 they have square brackets. Fixes bug 30721; bugfix
6633 o Minor bugfixes (onion service v3):
6634 - When purging the client descriptor cache, close any introduction
6635 point circuits associated with purged cache entries. This avoids
6636 picking those circuits later when connecting to the same
6637 introduction points. Fixes bug 30921; bugfix on 0.3.2.1-alpha.
6639 o Minor bugfixes (onion services):
6640 - In the hs_ident_circuit_t data structure, remove the unused field
6641 circuit_type and the respective argument in hs_ident_circuit_new().
6642 This field was set by clients (for introduction) and services (for
6643 introduction and rendezvous) but was never used afterwards. Fixes
6644 bug 31490; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
6646 o Minor bugfixes (operator tools):
6647 - Make tor-print-ed-signing-cert(1) print certificate expiration
6648 date in RFC 1123 and UNIX timestamp formats, to make output
6649 machine readable. Fixes bug 31012; bugfix on 0.3.5.1-alpha.
6651 o Minor bugfixes (rust):
6652 - Correctly exclude a redundant rust build job in Travis. Fixes bug
6653 31463; bugfix on 0.3.5.4-alpha.
6654 - Raise the minimum rustc version to 1.31.0, as checked by configure
6655 and CI. Fixes bug 31442; bugfix on 0.3.5.4-alpha.
6657 o Minor bugfixes (sendme, code structure):
6658 - Rename the trunnel SENDME file definition from sendme.trunnel to
6659 sendme_cell.trunnel to avoid having twice sendme.{c|h} in the
6660 repository. Fixes bug 30769; bugfix on 0.4.1.1-alpha.
6662 o Minor bugfixes (statistics):
6663 - Stop removing the ed25519 signature if the extra info file is too
6664 big. If the signature data was removed, but the keyword was kept,
6665 this could result in an unparseable extra info file. Fixes bug
6666 30958; bugfix on 0.2.7.2-alpha.
6668 o Minor bugfixes (subsystems):
6669 - Make the subsystem init order match the subsystem module
6670 dependencies. Call windows process security APIs as early as
6671 possible. Initialize logging before network and time, so that
6672 network and time can use logging. Fixes bug 31615; bugfix
6675 o Minor bugfixes (testing):
6676 - Teach the util/socketpair_ersatz test to work correctly when we
6677 have no network stack configured. Fixes bug 30804; bugfix
6680 o Minor bugfixes (v2 single onion services):
6681 - Always retry v2 single onion service intro and rend circuits with
6682 a 3-hop path. Previously, v2 single onion services used a 3-hop
6683 path when rendezvous circuits were retried after a remote or
6684 delayed failure, but a 1-hop path for immediate retries. Fixes bug
6685 23818; bugfix on 0.2.9.3-alpha.
6687 o Minor bugfixes (v3 single onion services):
6688 - Always retry v3 single onion service intro and rend circuits with
6689 a 3-hop path. Previously, v3 single onion services used a 3-hop
6690 path when rend circuits were retried after a remote or delayed
6691 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
6692 bugfix on 0.3.2.1-alpha.
6693 - Make v3 single onion services fall back to a 3-hop intro, when all
6694 intro points are unreachable via a 1-hop path. Previously, v3
6695 single onion services failed when all intro nodes were unreachable
6696 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
6699 - Improve documentation in circuit padding subsystem. Patch by
6700 Tobias Pulls. Closes ticket 31113.
6701 - Include an example usage for IPv6 ORPort in our sample torrc.
6702 Closes ticket 31320; patch from Ali Raheem.
6703 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
6704 notice.html so that operators no longer have to host it
6705 themselves. Closes ticket 31089.
6708 - No longer include recommended package digests in votes as detailed
6709 in proposal 301. The RecommendedPackages torrc option is
6710 deprecated and will no longer have any effect. "package" lines
6711 will still be considered when computing consensuses for consensus
6712 methods that include them. (This change has no effect on the list
6713 of recommended Tor versions, which is still in use.) Closes
6715 - Remove torctl.in from contrib/dist directory. Resolves
6719 - Run shellcheck for all non-third-party shell scripts that are
6720 shipped with Tor. Closes ticket 29533.
6721 - When checking shell scripts, ignore any user-created directories.
6722 Closes ticket 30967.
6724 o Code simplification and refactoring (config handling):
6725 - Extract our variable manipulation code from confparse.c to a new
6726 lower-level typedvar.h module. Closes ticket 30864.
6727 - Lower another layer of object management from confparse.c to a
6728 more general tool. Now typed structure members are accessible via
6729 an abstract type. Implements ticket 30914.
6730 - Move our backend logic for working with configuration and state
6731 files into a lower-level library, since it no longer depends on
6732 any tor-specific functionality. Closes ticket 31626.
6733 - Numerous simplifications in configuration-handling logic: remove
6734 duplicated macro definitions, replace magical names with flags,
6735 and refactor "TestingTorNetwork" to use the same default-option
6736 logic as the rest of Tor. Closes ticket 30935.
6737 - Replace our ad-hoc set of flags for configuration variables and
6738 configuration variable types with fine-grained orthogonal flags
6739 corresponding to the actual behavior we want. Closes ticket 31625.
6741 o Code simplification and refactoring (misc):
6742 - Eliminate some uses of lower-level control reply abstractions,
6743 primarily in the onion_helper functions. Closes ticket 30889.
6744 - Rework bootstrap tracking to use the new publish-subscribe
6745 subsystem. Closes ticket 29976.
6746 - Rewrite format_node_description() and router_get_verbose_nickname()
6747 to use strlcpy() and strlcat(). The previous implementation used
6748 memcpy() and pointer arithmetic, which was error-prone. Closes
6749 ticket 31545. This is CID 1452819.
6750 - Split extrainfo_dump_to_string() into smaller functions. Closes
6752 - Use the ptrdiff_t type consistently for expressing variable
6753 offsets and pointer differences. Previously we incorrectly (but
6754 harmlessly) used int and sometimes off_t for these cases. Closes
6756 - Use the subsystems mechanism to manage the main event loop code.
6757 Closes ticket 30806.
6758 - Various simplifications and minor improvements to the circuit
6759 padding machines. Patch by Tobias Pulls. Closes tickets 31112
6762 o Documentation (hard-coded directories):
6763 - Improve the documentation for the DirAuthority and FallbackDir
6764 torrc options. Closes ticket 30955.
6766 o Documentation (tor.1 man page):
6767 - Fix typo in tor.1 man page: the option is "--help", not "-help".
6768 Fixes bug 31008; bugfix on 0.2.2.9-alpha.
6771 Changes in version 0.4.1.5 - 2019-08-20
6772 This is the first stable release in the 0.4.1.x series. This series
6773 adds experimental circuit-level padding, authenticated SENDME cells to
6774 defend against certain attacks, and several performance improvements
6775 to save on CPU consumption. It fixes bugs in bootstrapping and v3
6776 onion services. It also includes numerous smaller features and
6777 bugfixes on earlier versions.
6779 Per our support policy, we will support the 0.4.1.x series for nine
6780 months, or until three months after the release of a stable 0.4.2.x:
6781 whichever is longer. If you need longer-term support, please stick
6782 with 0.3.5.x, which will we plan to support until Feb 2022.
6784 Below are the changes since 0.4.1.4-rc. For a complete list of changes
6785 since 0.4.0.5, see the ReleaseNotes file.
6787 o Directory authority changes:
6788 - The directory authority "dizum" has a new IP address. Closes
6791 o Minor features (circuit padding logging):
6792 - Demote noisy client-side warn logs about circuit padding to
6793 protocol warnings. Add additional log messages and circuit ID
6794 fields to help with bug 30992 and any other future issues.
6796 o Minor bugfixes (circuit padding negotiation):
6797 - Bump the circuit padding protocol version to explicitly signify
6798 that the HS setup machine support is finalized in 0.4.1.x-stable.
6799 This also means that 0.4.1.x-alpha clients will not negotiate
6800 padding with 0.4.1.x-stable relays, and 0.4.1.x-stable clients
6801 will not negotiate padding with 0.4.1.x-alpha relays (or 0.4.0.x
6802 relays). Fixes bug 31356; bugfix on 0.4.1.1-alpha.
6804 o Minor bugfixes (circuit padding):
6805 - Ignore non-padding cells on padding circuits. This addresses
6806 various warning messages from subsystems that were not expecting
6807 padding circuits. Fixes bug 30942; bugfix on 0.4.1.1-alpha.
6809 o Minor bugfixes (clock skew detection):
6810 - Don't believe clock skew results from NETINFO cells that appear to
6811 arrive before we sent the VERSIONS cells they are responding to.
6812 Previously, we would accept them up to 3 minutes "in the past".
6813 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
6815 o Minor bugfixes (compatibility, standards compliance):
6816 - Fix a bug that would invoke undefined behavior on certain
6817 operating systems when trying to asprintf() a string exactly
6818 INT_MAX bytes long. We don't believe this is exploitable, but it's
6819 better to fix it anyway. Fixes bug 31001; bugfix on 0.2.2.11-alpha.
6820 Found and fixed by Tobias Stoeckmann.
6822 o Minor bugfixes (compilation warning):
6823 - Fix a compilation warning on Windows about casting a function
6824 pointer for GetTickCount64(). Fixes bug 31374; bugfix
6827 o Minor bugfixes (compilation):
6828 - Avoid using labs() on time_t, which can cause compilation warnings
6829 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
6831 o Minor bugfixes (distribution):
6832 - Do not ship any temporary files found in the
6833 scripts/maint/practracker directory. Fixes bug 31311; bugfix
6836 o Testing (continuous integration):
6837 - In Travis, make stem log a controller trace to the console, and
6838 tail stem's tor log after failure. Closes ticket 30591.
6839 - In Travis, only run the stem tests that use a tor binary. Closes
6843 Changes in version 0.4.1.4-rc - 2019-07-25
6844 Tor 0.4.1.4-rc fixes a few bugs from previous versions of Tor, and
6845 updates to a new list of fallback directories. If no new bugs are
6846 found, the next release in the 0.4.1.x serious should be stable.
6848 o Major bugfixes (circuit build, guard):
6849 - When considering upgrading circuits from "waiting for guard" to
6850 "open", always ignore circuits that are marked for close. Otherwise,
6851 we can end up in the situation where a subsystem is notified that
6852 a closing circuit has just opened, leading to undesirable
6853 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
6855 o Minor features (continuous integration):
6856 - Our Travis configuration now uses Chutney to run some network
6857 integration tests automatically. Closes ticket 29280.
6859 o Minor features (fallback directory list):
6860 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
6861 in December 2018 (of which ~122 were still functional), with a
6862 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
6863 in June 2019. Closes ticket 28795.
6865 o Minor bugfixes (circuit padding):
6866 - On relays, properly check that a padding machine is absent before
6867 logging a warning about it being absent. Fixes bug 30649; bugfix
6869 - Add two NULL checks in unreachable places to silence Coverity (CID
6870 144729 and 1447291) and better future-proof ourselves. Fixes bug
6871 31024; bugfix on 0.4.1.1-alpha.
6873 o Minor bugfixes (crash on exit):
6874 - Avoid a set of possible code paths that could try to use freed
6875 memory in routerlist_free() while Tor was exiting. Fixes bug
6876 31003; bugfix on 0.1.2.2-alpha.
6878 o Minor bugfixes (logging):
6879 - Fix a conflict between the flag used for messaging-domain log
6880 messages, and the LD_NO_MOCK testing flag. Fixes bug 31080; bugfix
6883 o Minor bugfixes (memory leaks):
6884 - Fix a trivial memory leak when parsing an invalid value from a
6885 download schedule in the configuration. Fixes bug 30894; bugfix
6888 o Code simplification and refactoring:
6889 - Remove some dead code from circpad_machine_remove_token() to fix
6890 some Coverity warnings (CID 1447298). Fixes bug 31027; bugfix
6894 Changes in version 0.4.1.3-alpha - 2019-06-25
6895 Tor 0.4.1.3-alpha resolves numerous bugs left over from the previous
6896 alpha, most of them from earlier release series.
6898 o Major bugfixes (Onion service reachability):
6899 - Properly clean up the introduction point map when circuits change
6900 purpose from onion service circuits to pathbias, measurement, or
6901 other circuit types. This should fix some service-side instances
6902 of introduction point failure. Fixes bug 29034; bugfix
6905 o Minor features (geoip):
6906 - Update geoip and geoip6 to the June 10 2019 Maxmind GeoLite2
6907 Country database. Closes ticket 30852.
6909 o Minor features (logging):
6910 - Give a more useful assertion failure message if we think we have
6911 minherit() but we fail to make a region non-inheritable. Give a
6912 compile-time warning if our support for minherit() is incomplete.
6913 Closes ticket 30686.
6915 o Minor bugfixes (circuit isolation):
6916 - Fix a logic error that prevented the SessionGroup sub-option from
6917 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
6919 o Minor bugfixes (continuous integration):
6920 - Allow the test-stem job to fail in Travis, because it sometimes
6921 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
6922 - Skip test_rebind on macOS in Travis, because it is unreliable on
6923 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
6924 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
6925 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
6927 o Minor bugfixes (directory authorities):
6928 - Stop crashing after parsing an unknown descriptor purpose
6929 annotation. We think this bug can only be triggered by modifying a
6930 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
6932 o Minor bugfixes (pluggable transports):
6933 - When running as a bridge with pluggable transports, always publish
6934 pluggable transport information in our extrainfo descriptor, even
6935 if ExtraInfoStatistics is 0. This information is needed by
6936 BridgeDB. Fixes bug 30956; bugfix on 0.4.1.1-alpha.
6939 - Mention URLs for Travis/Appveyor/Jenkins in ReleasingTor.md.
6940 Closes ticket 30630.
6943 Changes in version 0.4.1.2-alpha - 2019-06-06
6944 Tor 0.4.1.2-alpha resolves numerous bugs--some of them from the
6945 previous alpha, and some much older. It also contains minor testing
6946 improvements, and an improvement to the security of our authenticated
6947 SENDME implementation.
6949 o Major bugfixes (bridges):
6950 - Consider our directory information to have changed when our list
6951 of bridges changes. Previously, Tor would not re-compute the
6952 status of its directory information when bridges changed, and
6953 therefore would not realize that it was no longer able to build
6954 circuits. Fixes part of bug 29875.
6955 - Do not count previously configured working bridges towards our
6956 total of working bridges. Previously, when Tor's list of bridges
6957 changed, it would think that the old bridges were still usable,
6958 and delay fetching router descriptors for the new ones. Fixes part
6959 of bug 29875; bugfix on 0.3.0.1-alpha.
6961 o Major bugfixes (flow control, SENDME):
6962 - Decrement the stream-level package window after packaging a cell.
6963 Previously, it was done inside a log_debug() call, meaning that if
6964 debug logs were not enabled, the decrement would never happen, and
6965 thus the window would be out of sync with the other end point.
6966 Fixes bug 30628; bugfix on 0.4.1.1-alpha.
6968 o Major bugfixes (onion service reachability):
6969 - Properly clean up the introduction point map and associated state
6970 when circuits change purpose from onion service circuits to
6971 pathbias, measurement, or other circuit types. This may fix some
6972 instances of introduction point failure. Fixes bug 29034; bugfix
6975 o Minor features (authenticated SENDME):
6976 - Ensure that there is enough randomness on every circuit to prevent
6977 an attacker from successfully predicting the hashes they will need
6978 to include in authenticated SENDME cells. At a random interval, if
6979 we have not sent randomness already, we now leave some extra space
6980 at the end of a cell that we can fill with random bytes. Closes
6983 o Minor features (continuous integration):
6984 - When running coverage builds on Travis, we now set
6985 TOR_TEST_RNG_SEED, to avoid RNG-based coverage differences. Part
6988 o Minor features (maintenance):
6989 - Add a new "make autostyle" target that developers can use to apply
6990 all automatic Tor style and consistency conversions to the
6991 codebase. Closes ticket 30539.
6993 o Minor features (testing):
6994 - The circuitpadding tests now use a reproducible RNG implementation,
6995 so that if a test fails, we can learn why. Part of ticket 28878.
6996 - Tor's tests now support an environment variable, TOR_TEST_RNG_SEED,
6997 to set the RNG seed for tests that use a reproducible RNG. Part of
6999 - When running tests in coverage mode, take additional care to make
7000 our coverage deterministic, so that we can accurately track
7001 changes in code coverage. Closes ticket 30519.
7003 o Minor bugfixes (configuration, proxies):
7004 - Fix a bug that prevented us from supporting SOCKS5 proxies that
7005 want authentication along with configured (but unused!)
7006 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
7008 o Minor bugfixes (controller):
7009 - POSTDESCRIPTOR requests should work again. Previously, they were
7010 broken if a "purpose=" flag was specified. Fixes bug 30580; bugfix
7012 - Repair the HSFETCH command so that it works again. Previously, it
7013 expected a body when it shouldn't have. Fixes bug 30646; bugfix
7016 o Minor bugfixes (developer tooling):
7017 - Fix pre-push hook to allow fixup and squash commits when pushing
7018 to non-upstream git remote. Fixes bug 30286; bugfix
7021 o Minor bugfixes (directory authority):
7022 - Move the "bandwidth-file-headers" line in directory authority
7023 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
7026 o Minor bugfixes (NetBSD):
7027 - Fix usage of minherit() on NetBSD and other platforms that define
7028 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
7029 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
7031 o Minor bugfixes (out-of-memory handler):
7032 - When purging the DNS cache because of an out-of-memory condition,
7033 try purging just the older entries at first. Previously, we would
7034 always purge the whole thing. Fixes bug 29617; bugfix
7037 o Minor bugfixes (portability):
7038 - Avoid crashing in our tor_vasprintf() implementation on systems
7039 that define neither vasprintf() nor _vscprintf(). (This bug has
7040 been here long enough that we question whether people are running
7041 Tor on such systems, but we're applying the fix out of caution.)
7042 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
7045 o Minor bugfixes (shutdown, libevent, memory safety):
7046 - Avoid use-after-free bugs when shutting down, by making sure that
7047 we shut down libevent only after shutting down all of its users.
7048 We believe these are harmless in practice, since they only occur
7049 on the shutdown path, and do not involve any attacker-controlled
7050 data. Fixes bug 30629; bugfix on 0.4.1.1-alpha.
7052 o Minor bugfixes (static analysis):
7053 - Fix several spurious Coverity warnings about the unit tests, to
7054 lower our chances of missing real warnings in the future. Fixes
7055 bug 30150; bugfix on 0.3.5.1-alpha and various other Tor versions.
7058 - Specify torrc paths (with empty files) when launching tor in
7059 integration tests; refrain from reading user and system torrcs.
7060 Resolves issue 29702.
7063 Changes in version 0.4.1.1-alpha - 2019-05-22
7064 This is the first alpha in the 0.4.1.x series. It introduces
7065 lightweight circuit padding to make some onion-service circuits harder
7066 to distinguish, includes a new "authenticated SENDME" feature to make
7067 certain denial-of-service attacks more difficult, and improves
7068 performance in several areas.
7070 o Major features (circuit padding):
7071 - Onion service clients now add padding cells at the start of their
7072 INTRODUCE and RENDEZVOUS circuits, to make those circuits' traffic
7073 look more like general purpose Exit traffic. The overhead for this
7074 is 2 extra cells in each direction for RENDEZVOUS circuits, and 1
7075 extra upstream cell and 10 downstream cells for INTRODUCE
7076 circuits. This feature is only enabled when also supported by the
7077 circuit's middle node. (Clients may specify fixed middle nodes
7078 with the MiddleNodes option, and may force-disable this feature
7079 with the CircuitPadding option.) Closes ticket 28634.
7081 o Major features (code organization):
7082 - Tor now includes a generic publish-subscribe message-passing
7083 subsystem that we can use to organize intermodule dependencies. We
7084 hope to use this to reduce dependencies between modules that don't
7085 need to be related, and to generally simplify our codebase. Closes
7088 o Major features (controller protocol):
7089 - Controller commands are now parsed using a generalized parsing
7090 subsystem. Previously, each controller command was responsible for
7091 parsing its own input, which led to strange inconsistencies.
7092 Closes ticket 30091.
7094 o Major features (flow control):
7095 - Implement authenticated SENDMEs as detailed in proposal 289. A
7096 SENDME cell now includes the digest of the traffic that it
7097 acknowledges, so that once an end point receives the SENDME, it
7098 can confirm the other side's knowledge of the previous cells that
7099 were sent, and prevent certain types of denial-of-service attacks.
7100 This behavior is controlled by two new consensus parameters: see
7101 the proposal for more details. Fixes ticket 26288.
7103 o Major features (performance):
7104 - Our node selection algorithm now excludes nodes in linear time.
7105 Previously, the algorithm was quadratic, which could slow down
7106 heavily used onion services. Closes ticket 30307.
7108 o Major features (performance, RNG):
7109 - Tor now constructs a fast secure pseudorandom number generator for
7110 each thread, to use when performance is critical. This PRNG is
7111 based on AES-CTR, using a buffering construction similar to
7112 libottery and the (newer) OpenBSD arc4random() code. It
7113 outperforms OpenSSL 1.1.1a's CSPRNG by roughly a factor of 100 for
7114 small outputs. Although we believe it to be cryptographically
7115 strong, we are only using it when necessary for performance.
7116 Implements tickets 29023 and 29536.
7118 o Major bugfixes (onion service v3):
7119 - Fix an unreachable bug in which an introduction point could try to
7120 send an INTRODUCE_ACK with a status code that Trunnel would refuse
7121 to encode, leading the relay to assert(). We've consolidated the
7122 ABI values into Trunnel now. Fixes bug 30454; bugfix
7124 - Clients can now handle unknown status codes from INTRODUCE_ACK
7125 cells. (The NACK behavior will stay the same.) This will allow us
7126 to extend status codes in the future without breaking the normal
7127 client behavior. Fixes another part of bug 30454; bugfix
7130 o Minor features (circuit padding):
7131 - We now use a fast PRNG when scheduling circuit padding. Part of
7133 - Allow the padding machine designer to pick the edges of their
7134 histogram instead of trying to compute them automatically using an
7135 exponential formula. Resolves some undefined behavior in the case
7136 of small histograms and allows greater flexibility on machine
7137 design. Closes ticket 29298; bugfix on 0.4.0.1-alpha.
7138 - Allow circuit padding machines to hold a circuit open until they
7139 are done padding it. Closes ticket 28780.
7141 o Minor features (compile-time modules):
7142 - Add a "--list-modules" command to print a list of which compile-
7143 time modules are enabled. Closes ticket 30452.
7145 o Minor features (continuous integration):
7146 - Remove sudo configuration lines from .travis.yml as they are no
7147 longer needed with current Travis build environment. Resolves
7149 - In Travis, show stem's tor log after failure. Closes ticket 30234.
7151 o Minor features (controller):
7152 - Add onion service version 3 support to the HSFETCH command.
7153 Previously, only version 2 onion services were supported. Closes
7154 ticket 25417. Patch by Neel Chauhan.
7156 o Minor features (debugging):
7157 - Introduce tor_assertf() and tor_assertf_nonfatal() to enable
7158 logging of additional information during assert failure. Now we
7159 can use format strings to include information for trouble
7160 shooting. Resolves ticket 29662.
7162 o Minor features (defense in depth):
7163 - In smartlist_remove_keeporder(), set unused pointers to NULL, in
7164 case a bug causes them to be used later. Closes ticket 30176.
7165 Patch from Tobias Stoeckmann.
7166 - Tor now uses a cryptographically strong PRNG even for decisions
7167 that we do not believe are security-sensitive. Previously, for
7168 performance reasons, we had used a trivially predictable linear
7169 congruential generator algorithm for certain load-balancing and
7170 statistical sampling decisions. Now we use our fast RNG in those
7171 cases. Closes ticket 29542.
7173 o Minor features (developer tools):
7174 - Tor's "practracker" test script now checks for files and functions
7175 that seem too long and complicated. Existing overlong functions
7176 and files are accepted for now, but should eventually be
7177 refactored. Closes ticket 29221.
7178 - Add some scripts used for git maintenance to scripts/git. Closes
7180 - Call practracker from pre-push and pre-commit git hooks to let
7181 developers know if they made any code style violations. Closes
7183 - Add a script to check that each header has a well-formed and
7184 unique guard macro. Closes ticket 29756.
7186 o Minor features (geoip):
7187 - Update geoip and geoip6 to the May 13 2019 Maxmind GeoLite2
7188 Country database. Closes ticket 30522.
7190 o Minor features (HTTP tunnel):
7191 - Return an informative web page when the HTTPTunnelPort is used as
7192 an HTTP proxy. Closes ticket 27821, patch by "eighthave".
7194 o Minor features (IPv6, v3 onion services):
7195 - Make v3 onion services put IPv6 addresses in service descriptors.
7196 Before this change, service descriptors only contained IPv4
7197 addresses. Implements 26992.
7199 o Minor features (modularity):
7200 - The "--disable-module-dirauth" compile-time option now disables
7201 even more dirauth-only code. Closes ticket 30345.
7203 o Minor features (performance):
7204 - Use OpenSSL's implementations of SHA3 when available (in OpenSSL
7205 1.1.1 and later), since they tend to be faster than tiny-keccak.
7206 Closes ticket 28837.
7208 o Minor features (testing):
7209 - Tor's unit test code now contains helper functions to replace the
7210 PRNG with a deterministic or reproducible version for testing.
7211 Previously, various tests implemented this in various ways.
7212 Implements ticket 29732.
7213 - We now have a script, cov-test-determinism.sh, to identify places
7214 where our unit test coverage has become nondeterministic. Closes
7216 - Check that representative subsets of values of `int` and `unsigned
7217 int` can be represented by `void *`. Resolves issue 29537.
7219 o Minor bugfixes (bridge authority):
7220 - Bridge authorities now set bridges as running or non-running when
7221 about to dump their status to a file. Previously, they set bridges
7222 as running in response to a GETINFO command, but those shouldn't
7223 modify data structures. Fixes bug 24490; bugfix on 0.2.0.13-alpha.
7224 Patch by Neel Chauhan.
7226 o Minor bugfixes (channel padding statistics):
7227 - Channel padding write totals and padding-enabled totals are now
7228 counted properly in relay extrainfo descriptors. Fixes bug 29231;
7229 bugfix on 0.3.1.1-alpha.
7231 o Minor bugfixes (circuit padding):
7232 - Add a "CircuitPadding" torrc option to disable circuit padding.
7233 Fixes bug 28693; bugfix on 0.4.0.1-alpha.
7234 - Allow circuit padding machines to specify that they do not
7235 contribute much overhead, and provide consensus flags and torrc
7236 options to force clients to only use these low overhead machines.
7237 Fixes bug 29203; bugfix on 0.4.0.1-alpha.
7238 - Provide a consensus parameter to fully disable circuit padding, to
7239 be used in emergency network overload situations. Fixes bug 30173;
7240 bugfix on 0.4.0.1-alpha.
7241 - The circuit padding subsystem will no longer schedule padding if
7242 dormant mode is enabled. Fixes bug 28636; bugfix on 0.4.0.1-alpha.
7243 - Inspect a circuit-level cell queue before sending padding, to
7244 avoid sending padding while too much data is already queued. Fixes
7245 bug 29204; bugfix on 0.4.0.1-alpha.
7246 - Avoid calling monotime_absolute_usec() in circuit padding machines
7247 that do not use token removal or circuit RTT estimation. Fixes bug
7248 29085; bugfix on 0.4.0.1-alpha.
7250 o Minor bugfixes (compilation, unusual configurations):
7251 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
7252 due to missing declarations of abort(), and prevent other such
7253 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
7255 o Minor bugfixes (controller protocol):
7256 - Teach the controller parser to distinguish an object preceded by
7257 an argument list from one without. Previously, it couldn't
7258 distinguish an argument list from the first line of a multiline
7259 object. Fixes bug 29984; bugfix on 0.2.3.8-alpha.
7261 o Minor bugfixes (directory authority, ipv6):
7262 - Directory authorities with IPv6 support now always mark themselves
7263 as reachable via IPv6. Fixes bug 24338; bugfix on 0.2.4.1-alpha.
7264 Patch by Neel Chauhan.
7266 o Minor bugfixes (documentation):
7267 - Improve the documentation for using MapAddress with ".exit". Fixes
7268 bug 30109; bugfix on 0.1.0.1-rc.
7269 - Improve the monotonic time module and function documentation to
7270 explain what "monotonic" actually means, and document some results
7271 that have surprised people. Fixes bug 29640; bugfix
7273 - Use proper formatting when providing an example on quoting options
7274 that contain whitespace. Fixes bug 29635; bugfix on 0.2.3.18-rc.
7276 o Minor bugfixes (logging):
7277 - Do not log a warning when running with an OpenSSL version other
7278 than the one Tor was compiled with, if the two versions should be
7279 compatible. Previously, we would warn whenever the version was
7280 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
7281 - Warn operators when the MyFamily option is set but ContactInfo is
7282 missing, as the latter should be set too. Fixes bug 25110; bugfix
7285 o Minor bugfixes (memory leak):
7286 - Avoid a minor memory leak that could occur on relays when failing
7287 to create a "keys" directory. Fixes bug 30148; bugfix
7290 o Minor bugfixes (onion services):
7291 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
7292 implementation) when failing to load an onion service client
7293 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
7294 - When refusing to launch a controller's HSFETCH request because of
7295 rate-limiting, respond to the controller with a new response,
7296 "QUERY_RATE_LIMITED". Previously, we would log QUERY_NO_HSDIR for
7297 this case. Fixes bug 28269; bugfix on 0.3.1.1-alpha. Patch by
7299 - When relaunching a circuit to a rendezvous service, mark the
7300 circuit as needing high-uptime routers as appropriate. Fixes bug
7301 17357; bugfix on 0.1.0.1-rc. Patch by Neel Chauhan.
7302 - Stop ignoring IPv6 link specifiers sent to v3 onion services.
7303 (IPv6 support for v3 onion services is still incomplete: see
7304 ticket 23493 for details.) Fixes bug 23588; bugfix on
7305 0.3.2.1-alpha. Patch by Neel Chauhan.
7307 o Minor bugfixes (onion services, performance):
7308 - When building circuits to onion services, call tor_addr_parse()
7309 less often. Previously, we called tor_addr_parse() in
7310 circuit_is_acceptable() even if its output wasn't used. This
7311 change should improve performance when building circuits. Fixes
7312 bug 22210; bugfix on 0.2.8.12. Patch by Neel Chauhan.
7314 o Minor bugfixes (performance):
7315 - When checking whether a node is a bridge, use a fast check to make
7316 sure that its identity is set. Previously, we used a constant-time
7317 check, which is not necessary in this case. Fixes bug 30308;
7318 bugfix on 0.3.5.1-alpha.
7320 o Minor bugfixes (pluggable transports):
7321 - Tor now sets TOR_PT_EXIT_ON_STDIN_CLOSE=1 for client transports as
7322 well as servers. Fixes bug 25614; bugfix on 0.2.7.1-alpha.
7324 o Minor bugfixes (probability distributions):
7325 - Refactor and improve parts of the probability distribution code
7326 that made Coverity complain. Fixes bug 29805; bugfix
7329 o Minor bugfixes (python):
7330 - Stop assuming that /usr/bin/python3 exists. For scripts that work
7331 with python2, use /usr/bin/python. Otherwise, use /usr/bin/env
7332 python3. Fixes bug 29913; bugfix on 0.2.5.3-alpha.
7334 o Minor bugfixes (relay):
7335 - When running as a relay, if IPv6Exit is set to 1 while ExitRelay
7336 is auto, act as if ExitRelay is 1. Previously, we would ignore
7337 IPv6Exit if ExitRelay was 0 or auto. Fixes bug 29613; bugfix on
7338 0.3.5.1-alpha. Patch by Neel Chauhan.
7340 o Minor bugfixes (stats):
7341 - When ExtraInfoStatistics is 0, stop including bandwidth usage
7342 statistics, GeoIPFile hashes, ServerTransportPlugin lines, and
7343 bridge statistics by country in extra-info documents. Fixes bug
7344 29018; bugfix on 0.2.4.1-alpha.
7346 o Minor bugfixes (testing):
7347 - Call setrlimit() to disable core dumps in test_bt_cl.c. Previously
7348 we used `ulimit -c` in test_bt.sh, which violates POSIX shell
7349 compatibility. Fixes bug 29061; bugfix on 0.3.5.1-alpha.
7350 - Fix some incorrect code in the v3 onion service unit tests. Fixes
7351 bug 29243; bugfix on 0.3.2.1-alpha.
7352 - In the "routerkeys/*" tests, check the return values of mkdir()
7353 for possible failures. Fixes bug 29939; bugfix on 0.2.7.2-alpha.
7354 Found by Coverity as CID 1444254.
7355 - Split test_utils_general() into several smaller test functions.
7356 This makes it easier to perform resource deallocation on assert
7357 failure, and fixes Coverity warnings CID 1444117 and CID 1444118.
7358 Fixes bug 29823; bugfix on 0.2.9.1-alpha.
7360 o Minor bugfixes (tor-resolve):
7361 - Fix a memory leak in tor-resolve that could happen if Tor gave it
7362 a malformed SOCKS response. (Memory leaks in tor-resolve don't
7363 actually matter, but it's good to fix them anyway.) Fixes bug
7364 30151; bugfix on 0.4.0.1-alpha.
7366 o Code simplification and refactoring:
7367 - Abstract out the low-level formatting of replies on the control
7368 port. Implements ticket 30007.
7369 - Add several assertions in an attempt to fix some Coverity
7370 warnings. Closes ticket 30149.
7371 - Introduce a connection_dir_buf_add() helper function that checks
7372 for compress_state of dir_connection_t and automatically writes a
7373 string to directory connection with or without compression.
7374 Resolves issue 28816.
7375 - Make the base32_decode() API return the number of bytes written,
7376 for consistency with base64_decode(). Closes ticket 28913.
7377 - Move most relay-only periodic events out of mainloop.c into the
7378 relay subsystem. Closes ticket 30414.
7379 - Refactor and encapsulate parts of the codebase that manipulate
7380 crypt_path_t objects. Resolves issue 30236.
7381 - Refactor several places in our code that Coverity incorrectly
7382 believed might have memory leaks. Closes ticket 30147.
7383 - Remove redundant return values in crypto_format, and the
7384 associated return value checks elsewhere in the code. Make the
7385 implementations in crypto_format consistent, and remove redundant
7386 code. Resolves ticket 29660.
7387 - Rename tor_mem_is_zero() to fast_mem_is_zero(), to emphasize that
7388 it is not a constant-time function. Closes ticket 30309.
7389 - Replace hs_desc_link_specifier_t with link_specifier_t, and remove
7390 all hs_desc_link_specifier_t-specific code. Fixes bug 22781;
7391 bugfix on 0.3.2.1-alpha.
7392 - Simplify v3 onion service link specifier handling code. Fixes bug
7393 23576; bugfix on 0.3.2.1-alpha.
7394 - Split crypto_digest.c into NSS code, OpenSSL code, and shared
7395 code. Resolves ticket 29108.
7396 - Split control.c into several submodules, in preparation for
7397 distributing its current responsibilities throughout the codebase.
7398 Closes ticket 29894.
7399 - Start to move responsibility for knowing about periodic events to
7400 the appropriate subsystems, so that the mainloop doesn't need to
7401 know all the periodic events in the rest of the codebase.
7402 Implements tickets 30293 and 30294.
7405 - Document how to find git commits and tags for bug fixes in
7406 CodingStandards.md. Update some file documentation. Closes
7410 - Remove the linux-tor-prio.sh script from contrib/operator-tools
7411 directory. Resolves issue 29434.
7412 - Remove the obsolete OpenSUSE initscript. Resolves issue 30076.
7413 - Remove the obsolete script at contrib/dist/tor.sh.in. Resolves
7416 o Code simplification and refactoring (shell scripts):
7417 - Clean up many of our shell scripts to fix shellcheck warnings.
7418 These include autogen.sh (ticket 26069), test_keygen.sh (ticket
7419 29062), test_switch_id.sh (ticket 29065), test_rebind.sh (ticket
7420 29063), src/test/fuzz/minimize.sh (ticket 30079), test_rust.sh
7421 (ticket 29064), torify (ticket 29070), asciidoc-helper.sh (29926),
7422 fuzz_multi.sh (30077), fuzz_static_testcases.sh (ticket 29059),
7423 nagios-check-tor-authority-cert (ticket 29071),
7424 src/test/fuzz/fixup_filenames.sh (ticket 30078), test-network.sh
7425 (ticket 29060), test_key_expiration.sh (ticket 30002),
7426 zero_length_keys.sh (ticket 29068), and test_workqueue_*.sh
7429 o Testing (chutney):
7430 - In "make test-network-all", test IPv6-only v3 single onion
7431 services, using the chutney network single-onion-v23-ipv6-md.
7432 Closes ticket 27251.
7435 Changes in version 0.4.0.5 - 2019-05-02
7436 This is the first stable release in the 0.4.0.x series. It contains
7437 improvements for power management and bootstrap reporting, as well as
7438 preliminary backend support for circuit padding to prevent some kinds
7439 of traffic analysis. It also continues our work in refactoring Tor for
7440 long-term maintainability.
7442 Per our support policy, we will support the 0.4.0.x series for nine
7443 months, or until three months after the release of a stable 0.4.1.x:
7444 whichever is longer. If you need longer-term support, please stick
7445 with 0.3.5.x, which will we plan to support until Feb 2022.
7447 Below are the changes since 0.4.0.4-rc. For a complete list of changes
7448 since 0.3.5.7, see the ReleaseNotes file.
7450 o Minor features (continuous integration):
7451 - In Travis, tell timelimit to use stem's backtrace signals, and
7452 launch python directly from timelimit, so python receives the
7453 signals from timelimit, rather than make. Closes ticket 30117.
7455 o Minor features (diagnostic):
7456 - Add more diagnostic log messages in an attempt to solve the issue
7457 of NUL bytes appearing in a microdescriptor cache. Related to
7460 o Minor features (testing):
7461 - Use the approx_time() function when setting the "Expires" header
7462 in directory replies, to make them more testable. Needed for
7465 o Minor bugfixes (rust):
7466 - Abort on panic in all build profiles, instead of potentially
7467 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
7469 o Minor bugfixes (shellcheck):
7470 - Look for scripts in their correct locations during "make
7471 shellcheck". Previously we had looked in the wrong place during
7472 out-of-tree builds. Fixes bug 30263; bugfix on 0.4.0.1-alpha.
7474 o Minor bugfixes (testing):
7475 - Check the time in the "Expires" header using approx_time(). Fixes
7476 bug 30001; bugfix on 0.4.0.4-rc.
7478 o Minor bugfixes (UI):
7479 - Lower log level of unlink() errors during bootstrap. Fixes bug
7480 29930; bugfix on 0.4.0.1-alpha.
7483 Changes in version 0.4.0.4-rc - 2019-04-11
7484 Tor 0.4.0.4-rc is the first release candidate in its series; it fixes
7485 several bugs from earlier versions, including some that had affected
7486 stability, and one that prevented relays from working with NSS.
7488 o Major bugfixes (NSS, relay):
7489 - When running with NSS, disable TLS 1.2 ciphersuites that use
7490 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
7491 these ciphersuites don't work -- which caused relays to fail to
7492 handshake with one another when these ciphersuites were enabled.
7493 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
7495 o Minor features (bandwidth authority):
7496 - Make bandwidth authorities ignore relays that are reported in the
7497 bandwidth file with the flag "vote=0". This change allows us to
7498 report unmeasured relays for diagnostic reasons without including
7499 their bandwidth in the bandwidth authorities' vote. Closes
7501 - When a directory authority is using a bandwidth file to obtain the
7502 bandwidth values that will be included in the next vote, serve
7503 this bandwidth file at /tor/status-vote/next/bandwidth. Closes
7506 o Minor features (circuit padding):
7507 - Stop warning about undefined behavior in the probability
7508 distribution tests. Float division by zero may technically be
7509 undefined behavior in C, but it's well defined in IEEE 754.
7510 Partial backport of 29298. Closes ticket 29527; bugfix
7513 o Minor features (continuous integration):
7514 - On Travis Rust builds, cleanup Rust registry and refrain from
7515 caching the "target/" directory to speed up builds. Resolves
7518 o Minor features (dormant mode):
7519 - Add a DormantCanceledByStartup option to tell Tor that it should
7520 treat a startup event as cancelling any previous dormant state.
7521 Integrators should use this option with caution: it should only be
7522 used if Tor is being started because of something that the user
7523 did, and not if Tor is being automatically started in the
7524 background. Closes ticket 29357.
7526 o Minor features (geoip):
7527 - Update geoip and geoip6 to the April 2 2019 Maxmind GeoLite2
7528 Country database. Closes ticket 29992.
7530 o Minor features (NSS, diagnostic):
7531 - Try to log an error from NSS (if there is any) and a more useful
7532 description of our situation if we are using NSS and a call to
7533 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
7535 o Minor bugfixes (security):
7536 - Fix a potential double free bug when reading huge bandwidth files.
7537 The issue is not exploitable in the current Tor network because
7538 the vulnerable code is only reached when directory authorities
7539 read bandwidth files, but bandwidth files come from a trusted
7540 source (usually the authorities themselves). Furthermore, the
7541 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
7542 which are not used by any of the current authorities. Fixes bug
7543 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
7545 - Verify in more places that we are not about to create a buffer
7546 with more than INT_MAX bytes, to avoid possible OOB access in the
7547 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
7548 fixed by Tobias Stoeckmann.
7550 o Minor bugfix (continuous integration):
7551 - Reset coverage state on disk after Travis CI has finished. This
7552 should prevent future coverage merge errors from causing the test
7553 suite for the "process" subsystem to fail. The process subsystem
7554 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
7556 - Terminate test-stem if it takes more than 9.5 minutes to run.
7557 (Travis terminates the job after 10 minutes of no output.)
7558 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
7560 o Minor bugfixes (bootstrap reporting):
7561 - During bootstrap reporting, correctly distinguish pluggable
7562 transports from plain proxies. Fixes bug 28925; bugfix
7565 o Minor bugfixes (C correctness):
7566 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
7567 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
7570 o Minor bugfixes (circuitpadding testing):
7571 - Minor tweaks to avoid rare test failures related to timers and
7572 monotonic time. Fixes bug 29500; bugfix on 0.4.0.1-alpha.
7574 o Minor bugfixes (directory authorities):
7575 - Actually include the bandwidth-file-digest line in directory
7576 authority votes. Fixes bug 29959; bugfix on 0.4.0.2-alpha.
7578 o Minor bugfixes (logging):
7579 - On Windows, when errors cause us to reload a consensus from disk,
7580 tell the user that we are retrying at log level "notice".
7581 Previously we only logged this information at "info", which was
7582 confusing because the errors themselves were logged at "warning".
7583 Improves previous fix for 28614. Fixes bug 30004; bugfix
7586 o Minor bugfixes (pluggable transports):
7587 - Restore old behavior when it comes to discovering the path of a
7588 given Pluggable Transport executable file. A change in
7589 0.4.0.1-alpha had broken this behavior on paths containing a
7590 space. Fixes bug 29874; bugfix on 0.4.0.1-alpha.
7592 o Minor bugfixes (testing):
7593 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
7594 recent test-network.sh to use new chutney features in CI. Fixes
7595 bug 29703; bugfix on 0.2.9.1-alpha.
7596 - Fix a test failure on Windows caused by an unexpected "BUG"
7597 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
7600 o Minor bugfixes (TLS protocol):
7601 - When classifying a client's selection of TLS ciphers, if the
7602 client ciphers are not yet available, do not cache the result.
7603 Previously, we had cached the unavailability of the cipher list
7604 and never looked again, which in turn led us to assume that the
7605 client only supported the ancient V1 link protocol. This, in turn,
7606 was causing Stem integration tests to stall in some cases. Fixes
7607 bug 30021; bugfix on 0.2.4.8-alpha.
7609 o Code simplification and refactoring:
7610 - Introduce a connection_dir_buf_add() helper function that detects
7611 whether compression is in use, and adds a string accordingly.
7612 Resolves issue 28816.
7613 - Refactor handle_get_next_bandwidth() to use
7614 connection_dir_buf_add(). Implements ticket 29897.
7617 - Clarify that Tor performs stream isolation among *Port listeners
7618 by default. Resolves issue 29121.
7621 Changes in version 0.4.0.3-alpha - 2019-03-22
7622 Tor 0.4.0.3-alpha is the third in its series; it fixes several small
7623 bugs from earlier versions.
7625 o Minor features (address selection):
7626 - Treat the subnet 100.64.0.0/10 as public for some purposes;
7627 private for others. This subnet is the RFC 6598 (Carrier Grade
7628 NAT) IP range, and is deployed by many ISPs as an alternative to
7629 RFC 1918 that does not break existing internal networks. Tor now
7630 blocks SOCKS and control ports on these addresses and warns users
7631 if client ports or ExtORPorts are listening on a RFC 6598 address.
7632 Closes ticket 28525. Patch by Neel Chauhan.
7634 o Minor features (geoip):
7635 - Update geoip and geoip6 to the March 4 2019 Maxmind GeoLite2
7636 Country database. Closes ticket 29666.
7638 o Minor bugfixes (circuitpadding):
7639 - Inspect the circuit-level cell queue before sending padding, to
7640 avoid sending padding when too much data is queued. Fixes bug
7641 29204; bugfix on 0.4.0.1-alpha.
7643 o Minor bugfixes (logging):
7644 - Correct a misleading error message when IPv4Only or IPv6Only is
7645 used but the resolved address can not be interpreted as an address
7646 of the specified IP version. Fixes bug 13221; bugfix on
7647 0.2.3.9-alpha. Patch from Kris Katterjohn.
7648 - Log the correct port number for listening sockets when "auto" is
7649 used to let Tor pick the port number. Previously, port 0 was
7650 logged instead of the actual port number. Fixes bug 29144; bugfix
7651 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
7652 - Stop logging a BUG() warning when Tor is waiting for exit
7653 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
7655 o Minor bugfixes (memory management):
7656 - Refactor the shared random state's memory management so that it
7657 actually takes ownership of the shared random value pointers.
7658 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
7660 o Minor bugfixes (memory management, testing):
7661 - Stop leaking parts of the shared random state in the shared-random
7662 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
7664 o Minor bugfixes (pluggable transports):
7665 - Fix an assertion failure crash bug when a pluggable transport is
7666 terminated during the bootstrap phase. Fixes bug 29562; bugfix
7669 o Minor bugfixes (Rust, protover):
7670 - Add a missing "Padding" value to the Rust implementation of
7671 protover. Fixes bug 29631; bugfix on 0.4.0.1-alpha.
7673 o Minor bugfixes (single onion services):
7674 - Allow connections to single onion services to remain idle without
7675 being disconnected. Previously, relays acting as rendezvous points
7676 for single onion services were mistakenly closing idle rendezvous
7677 circuits after 60 seconds, thinking that they were unused
7678 directory-fetching circuits that had served their purpose. Fixes
7679 bug 29665; bugfix on 0.2.1.26.
7681 o Minor bugfixes (stats):
7682 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
7683 relay and bridge extra-info documents. Fixes bug 29017; bugfix
7686 o Minor bugfixes (testing):
7687 - Downgrade some LOG_ERR messages in the address/* tests to
7688 warnings. The LOG_ERR messages were occurring when we had no
7689 configured network. We were failing the unit tests, because we
7690 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
7691 29530; bugfix on 0.3.5.8.
7692 - Fix our gcov wrapper script to look for object files at the
7693 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
7694 - Decrease the false positive rate of stochastic probability
7695 distribution tests. Fixes bug 29693; bugfix on 0.4.0.1-alpha.
7697 o Minor bugfixes (Windows, CI):
7698 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
7699 Windows Server 2012 R2 job. The remaining 2 jobs still provide
7700 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
7701 fast_finish, so failed jobs terminate the build immediately. Fixes
7702 bug 29601; bugfix on 0.3.5.4-alpha.
7705 Changes in version 0.3.5.8 - 2019-02-21
7706 Tor 0.3.5.8 backports several fixes from later releases, including fixes
7707 for an annoying SOCKS-parsing bug that affected users in earlier 0.3.5.x
7710 It also includes a fix for a medium-severity security bug affecting Tor
7711 0.3.2.1-alpha and later. All Tor instances running an affected release
7712 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7714 o Major bugfixes (cell scheduler, KIST, security):
7715 - Make KIST consider the outbuf length when computing what it can
7716 put in the outbuf. Previously, KIST acted as though the outbuf
7717 were empty, which could lead to the outbuf becoming too full. It
7718 is possible that an attacker could exploit this bug to cause a Tor
7719 client or relay to run out of memory and crash. Fixes bug 29168;
7720 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7721 TROVE-2019-001 and CVE-2019-8955.
7723 o Major bugfixes (networking, backport from 0.4.0.2-alpha):
7724 - Gracefully handle empty username/password fields in SOCKS5
7725 username/password auth message and allow SOCKS5 handshake to
7726 continue. Previously, we had rejected these handshakes, breaking
7727 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
7729 o Minor features (compilation, backport from 0.4.0.2-alpha):
7730 - Compile correctly when OpenSSL is built with engine support
7731 disabled, or with deprecated APIs disabled. Closes ticket 29026.
7732 Patches from "Mangix".
7734 o Minor features (geoip):
7735 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7736 Country database. Closes ticket 29478.
7738 o Minor features (testing, backport from 0.4.0.2-alpha):
7739 - Treat all unexpected ERR and BUG messages as test failures. Closes
7742 o Minor bugfixes (onion service v3, client, backport from 0.4.0.1-alpha):
7743 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
7744 connection waiting for a descriptor that we actually have in the
7745 cache. It turns out that this can actually happen, though it is
7746 rare. Now, tor will recover and retry the descriptor. Fixes bug
7747 28669; bugfix on 0.3.2.4-alpha.
7749 o Minor bugfixes (IPv6, backport from 0.4.0.1-alpha):
7750 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
7751 IPv6 socket was bound using an address family of AF_INET instead
7752 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
7755 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
7756 - Update Cargo.lock file to match the version made by the latest
7757 version of Rust, so that "make distcheck" will pass again. Fixes
7758 bug 29244; bugfix on 0.3.3.4-alpha.
7760 o Minor bugfixes (client, clock skew, backport from 0.4.0.1-alpha):
7761 - Select guards even if the consensus has expired, as long as the
7762 consensus is still reasonably live. Fixes bug 24661; bugfix
7765 o Minor bugfixes (compilation, backport from 0.4.0.1-alpha):
7766 - Compile correctly on OpenBSD; previously, we were missing some
7767 headers required in order to detect it properly. Fixes bug 28938;
7768 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
7770 o Minor bugfixes (documentation, backport from 0.4.0.2-alpha):
7771 - Describe the contents of the v3 onion service client authorization
7772 files correctly: They hold public keys, not private keys. Fixes
7773 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
7775 o Minor bugfixes (logging, backport from 0.4.0.1-alpha):
7776 - Rework rep_hist_log_link_protocol_counts() to iterate through all
7777 link protocol versions when logging incoming/outgoing connection
7778 counts. Tor no longer skips version 5, and we won't have to
7779 remember to update this function when new link protocol version is
7780 developed. Fixes bug 28920; bugfix on 0.2.6.10.
7782 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
7783 - Log more information at "warning" level when unable to read a
7784 private key; log more information at "info" level when unable to
7785 read a public key. We had warnings here before, but they were lost
7786 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
7788 o Minor bugfixes (misc, backport from 0.4.0.2-alpha):
7789 - The amount of total available physical memory is now determined
7790 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
7791 when it is defined and a 64-bit variant is not available. Fixes
7792 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
7794 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
7795 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
7796 than one private key for a hidden service. Fixes bug 29040; bugfix
7798 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
7799 "debug" level. Tor used to log it as a warning, which caused very
7800 long log lines to appear for some users. Fixes bug 29135; bugfix
7802 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7803 as a warning. Instead, log it as a protocol warning, because there
7804 is nothing that relay operators can do to fix it. Fixes bug 29029;
7805 bugfix on 0.2.5.7-rc.
7807 o Minor bugfixes (tests, directory clients, backport from 0.4.0.1-alpha):
7808 - Mark outdated dirservers when Tor only has a reasonably live
7809 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
7811 o Minor bugfixes (tests, backport from 0.4.0.2-alpha):
7812 - Detect and suppress "bug" warnings from the util/time test on
7813 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
7814 - Do not log an error-level message if we fail to find an IPv6
7815 network interface from the unit tests. Fixes bug 29160; bugfix
7818 o Minor bugfixes (usability, backport from 0.4.0.1-alpha):
7819 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
7820 Some users took this phrasing to mean that the mentioned guard was
7821 under their control or responsibility, which it is not. Fixes bug
7822 28895; bugfix on Tor 0.3.0.1-alpha.
7825 Changes in version 0.3.4.11 - 2019-02-21
7826 Tor 0.3.4.11 is the third stable release in its series. It includes
7827 a fix for a medium-severity security bug affecting Tor 0.3.2.1-alpha and
7828 later. All Tor instances running an affected release should upgrade to
7829 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7831 o Major bugfixes (cell scheduler, KIST, security):
7832 - Make KIST consider the outbuf length when computing what it can
7833 put in the outbuf. Previously, KIST acted as though the outbuf
7834 were empty, which could lead to the outbuf becoming too full. It
7835 is possible that an attacker could exploit this bug to cause a Tor
7836 client or relay to run out of memory and crash. Fixes bug 29168;
7837 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7838 TROVE-2019-001 and CVE-2019-8955.
7840 o Minor features (geoip):
7841 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7842 Country database. Closes ticket 29478.
7844 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
7845 - Update Cargo.lock file to match the version made by the latest
7846 version of Rust, so that "make distcheck" will pass again. Fixes
7847 bug 29244; bugfix on 0.3.3.4-alpha.
7849 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
7850 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7851 as a warning. Instead, log it as a protocol warning, because there
7852 is nothing that relay operators can do to fix it. Fixes bug 29029;
7853 bugfix on 0.2.5.7-rc.
7856 Changes in version 0.3.3.12 - 2019-02-21
7857 Tor 0.3.3.12 fixes a medium-severity security bug affecting Tor
7858 0.3.2.1-alpha and later. All Tor instances running an affected release
7859 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7861 This release marks the end of support for the Tor 0.3.3.x series. We
7862 recommend that users switch to either the Tor 0.3.4 series (supported
7863 until at least 10 June 2019), or the Tor 0.3.5 series, which will
7864 receive long-term support until at least 1 Feb 2022.
7866 o Major bugfixes (cell scheduler, KIST, security):
7867 - Make KIST consider the outbuf length when computing what it can
7868 put in the outbuf. Previously, KIST acted as though the outbuf
7869 were empty, which could lead to the outbuf becoming too full. It
7870 is possible that an attacker could exploit this bug to cause a Tor
7871 client or relay to run out of memory and crash. Fixes bug 29168;
7872 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7873 TROVE-2019-001 and CVE-2019-8955.
7875 o Minor features (geoip):
7876 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7877 Country database. Closes ticket 29478.
7879 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
7880 - Update Cargo.lock file to match the version made by the latest
7881 version of Rust, so that "make distcheck" will pass again. Fixes
7882 bug 29244; bugfix on 0.3.3.4-alpha.
7884 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
7885 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7886 as a warning. Instead, log it as a protocol warning, because there
7887 is nothing that relay operators can do to fix it. Fixes bug 29029;
7888 bugfix on 0.2.5.7-rc.
7891 Changes in version 0.4.0.2-alpha - 2019-02-21
7892 Tor 0.4.0.2-alpha is the second alpha in its series; it fixes several
7893 bugs from earlier versions, including several that had broken
7894 backward compatibility.
7896 It also includes a fix for a medium-severity security bug affecting Tor
7897 0.3.2.1-alpha and later. All Tor instances running an affected release
7898 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7900 o Major bugfixes (cell scheduler, KIST, security):
7901 - Make KIST consider the outbuf length when computing what it can
7902 put in the outbuf. Previously, KIST acted as though the outbuf
7903 were empty, which could lead to the outbuf becoming too full. It
7904 is possible that an attacker could exploit this bug to cause a Tor
7905 client or relay to run out of memory and crash. Fixes bug 29168;
7906 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7907 TROVE-2019-001 and CVE-2019-8955.
7909 o Major bugfixes (networking):
7910 - Gracefully handle empty username/password fields in SOCKS5
7911 username/password auth messsage and allow SOCKS5 handshake to
7912 continue. Previously, we had rejected these handshakes, breaking
7913 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
7915 o Major bugfixes (windows, startup):
7916 - When reading a consensus file from disk, detect whether it was
7917 written in text mode, and re-read it in text mode if so. Always
7918 write consensus files in binary mode so that we can map them into
7919 memory later. Previously, we had written in text mode, which
7920 confused us when we tried to map the file on windows. Fixes bug
7921 28614; bugfix on 0.4.0.1-alpha.
7923 o Minor features (compilation):
7924 - Compile correctly when OpenSSL is built with engine support
7925 disabled, or with deprecated APIs disabled. Closes ticket 29026.
7926 Patches from "Mangix".
7928 o Minor features (developer tooling):
7929 - Check that bugfix versions in changes files look like Tor versions
7930 from the versions spec. Warn when bugfixes claim to be on a future
7931 release. Closes ticket 27761.
7932 - Provide a git pre-commit hook that disallows committing if we have
7933 any failures in our code and changelog formatting checks. It is
7934 now available in scripts/maint/pre-commit.git-hook. Implements
7937 o Minor features (directory authority):
7938 - When a directory authority is using a bandwidth file to obtain
7939 bandwidth values, include the digest of that file in the vote.
7940 Closes ticket 26698.
7942 o Minor features (geoip):
7943 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7944 Country database. Closes ticket 29478.
7946 o Minor features (testing):
7947 - Treat all unexpected ERR and BUG messages as test failures. Closes
7950 o Minor bugfixes (build, compatibility, rust):
7951 - Update Cargo.lock file to match the version made by the latest
7952 version of Rust, so that "make distcheck" will pass again. Fixes
7953 bug 29244; bugfix on 0.3.3.4-alpha.
7955 o Minor bugfixes (compilation):
7956 - Fix compilation warnings in test_circuitpadding.c. Fixes bug
7957 29169; bugfix on 0.4.0.1-alpha.
7958 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
7959 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
7961 o Minor bugfixes (documentation):
7962 - Describe the contents of the v3 onion service client authorization
7963 files correctly: They hold public keys, not private keys. Fixes
7964 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
7966 o Minor bugfixes (linux seccomp sandbox):
7967 - Fix startup crash when experimental sandbox support is enabled.
7968 Fixes bug 29150; bugfix on 0.4.0.1-alpha. Patch by Peter Gerber.
7970 o Minor bugfixes (logging):
7971 - Avoid logging that we are relaxing a circuit timeout when that
7972 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
7973 - Log more information at "warning" level when unable to read a
7974 private key; log more information at "info" level when unable to
7975 read a public key. We had warnings here before, but they were lost
7976 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
7978 o Minor bugfixes (misc):
7979 - The amount of total available physical memory is now determined
7980 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
7981 when it is defined and a 64-bit variant is not available. Fixes
7982 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
7984 o Minor bugfixes (onion services):
7985 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
7986 than one private key for a hidden service. Fixes bug 29040; bugfix
7988 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
7989 "debug" level. Tor used to log it as a warning, which caused very
7990 long log lines to appear for some users. Fixes bug 29135; bugfix
7992 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7993 as a warning. Instead, log it as a protocol warning, because there
7994 is nothing that relay operators can do to fix it. Fixes bug 29029;
7995 bugfix on 0.2.5.7-rc.
7997 o Minor bugfixes (scheduler):
7998 - When re-adding channels to the pending list, check the correct
7999 channel's sched_heap_idx. This issue has had no effect in mainline
8000 Tor, but could have led to bugs down the road in improved versions
8001 of our circuit scheduling code. Fixes bug 29508; bugfix
8004 o Minor bugfixes (tests):
8005 - Fix intermittent failures on an adaptive padding test. Fixes one
8006 case of bug 29122; bugfix on 0.4.0.1-alpha.
8007 - Disable an unstable circuit-padding test that was failing
8008 intermittently because of an ill-defined small histogram. Such
8009 histograms will be allowed again after 29298 is implemented. Fixes
8010 a second case of bug 29122; bugfix on 0.4.0.1-alpha.
8011 - Detect and suppress "bug" warnings from the util/time test on
8012 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
8013 - Do not log an error-level message if we fail to find an IPv6
8014 network interface from the unit tests. Fixes bug 29160; bugfix
8018 - In the manpage entry describing MapAddress torrc setting, use
8019 example IP addresses from ranges specified for use in documentation
8020 by RFC 5737. Resolves issue 28623.
8023 - Remove the old check-tor script. Resolves issue 29072.
8026 Changes in version 0.4.0.1-alpha - 2019-01-18
8027 Tor 0.4.0.1-alpha is the first release in the new 0.4.0.x series. It
8028 introduces improved features for power and bandwidth conservation,
8029 more accurate reporting of bootstrap progress for user interfaces, and
8030 an experimental backend for an exciting new adaptive padding feature.
8031 There is also the usual assortment of bugfixes and minor features, all
8034 o Major features (battery management, client, dormant mode):
8035 - When Tor is running as a client, and it is unused for a long time,
8036 it can now enter a "dormant" state. When Tor is dormant, it avoids
8037 network and CPU activity until it is reawoken either by a user
8038 request or by a controller command. For more information, see the
8039 configuration options starting with "Dormant". Implements tickets
8041 - The client's memory of whether it is "dormant", and how long it
8042 has spent idle, persists across invocations. Implements
8044 - There is a DormantOnFirstStartup option that integrators can use
8045 if they expect that in many cases, Tor will be installed but
8048 o Major features (bootstrap reporting):
8049 - When reporting bootstrap progress, report the first connection
8050 uniformly, regardless of whether it's a connection for building
8051 application circuits. This allows finer-grained reporting of early
8052 progress than previously possible, with the improvements of ticket
8053 27169. Closes tickets 27167 and 27103. Addresses ticket 27308.
8054 - When reporting bootstrap progress, treat connecting to a proxy or
8055 pluggable transport as separate from having successfully used that
8056 proxy or pluggable transport to connect to a relay. Closes tickets
8059 o Major features (circuit padding):
8060 - Implement preliminary support for the circuit padding portion of
8061 Proposal 254. The implementation supports Adaptive Padding (aka
8062 WTF-PAD) state machines for use between experimental clients and
8063 relays. Support is also provided for APE-style state machines that
8064 use probability distributions instead of histograms to specify
8065 inter-packet delay. At the moment, Tor does not provide any
8066 padding state machines that are used in normal operation: for now,
8067 this feature exists solely for experimentation. Closes
8070 o Major features (refactoring):
8071 - Tor now uses an explicit list of its own subsystems when
8072 initializing and shutting down. Previously, these systems were
8073 managed implicitly in various places throughout the codebase.
8074 (There may still be some subsystems using the old system.) Closes
8077 o Minor features (bootstrap reporting):
8078 - When reporting bootstrap progress, stop distinguishing between
8079 situations where only internal paths are available and situations
8080 where external paths are available. Previously, Tor would often
8081 erroneously report that it had only internal paths. Closes
8084 o Minor features (continuous integration):
8085 - Log Python version during each Travis CI job. Resolves
8088 o Minor features (controller):
8089 - Add a DROPOWNERSHIP command to undo the effects of TAKEOWNERSHIP.
8090 Implements ticket 28843.
8092 o Minor features (developer tooling):
8093 - Provide a git hook script to prevent "fixup!" and "squash!"
8094 commits from ending up in the master branch, as scripts/main/pre-
8095 push.git-hook. Closes ticket 27993.
8097 o Minor features (directory authority):
8098 - Directory authorities support a new consensus algorithm, under
8099 which the family lines in microdescriptors are encoded in a
8100 canonical form. This change makes family lines more compressible
8101 in transit, and on the client. Closes ticket 28266; implements
8104 o Minor features (directory authority, relay):
8105 - Authorities now vote on a "StaleDesc" flag to indicate that a
8106 relay's descriptor is so old that the relay should upload again
8107 soon. Relays treat this flag as a signal to upload a new
8108 descriptor. This flag will eventually let us remove the
8109 'published' date from routerstatus entries, and make our consensus
8110 diffs much smaller. Closes ticket 26770; implements proposal 293.
8112 o Minor features (fallback directory mirrors):
8113 - Update the fallback whitelist based on operator opt-ins and opt-
8114 outs. Closes ticket 24805, patch by Phoul.
8116 o Minor features (FreeBSD):
8117 - On FreeBSD-based systems, warn relay operators if the
8118 "net.inet.ip.random_id" sysctl (IP ID randomization) is disabled.
8119 Closes ticket 28518.
8121 o Minor features (HTTP standards compliance):
8122 - Stop sending the header "Content-type: application/octet-stream"
8123 along with transparently compressed documents: this confused
8124 browsers. Closes ticket 28100.
8126 o Minor features (IPv6):
8127 - We add an option ClientAutoIPv6ORPort, to make clients randomly
8128 prefer a node's IPv4 or IPv6 ORPort. The random preference is set
8129 every time a node is loaded from a new consensus or bridge config.
8130 We expect that this option will enable clients to bootstrap more
8131 quickly without having to determine whether they support IPv4,
8132 IPv6, or both. Closes ticket 27490. Patch by Neel Chauhan.
8133 - When using addrs_in_same_network_family(), avoid choosing circuit
8134 paths that pass through the same IPv6 subnet more than once.
8135 Previously, we only checked IPv4 subnets. Closes ticket 24393.
8136 Patch by Neel Chauhan.
8138 o Minor features (log messages):
8139 - Improve log message in v3 onion services that could print out
8140 negative revision counters. Closes ticket 27707. Patch
8143 o Minor features (memory usage):
8144 - Save memory by storing microdescriptor family lists with a more
8145 compact representation. Closes ticket 27359.
8146 - Tor clients now use mmap() to read consensus files from disk, so
8147 that they no longer need keep the full text of a consensus in
8148 memory when parsing it or applying a diff. Closes ticket 27244.
8150 o Minor features (parsing):
8151 - Directory authorities now validate that router descriptors and
8152 ExtraInfo documents are in a valid subset of UTF-8, and reject
8153 them if they are not. Closes ticket 27367.
8155 o Minor features (performance):
8156 - Cache the results of summarize_protocol_flags(), so that we don't
8157 have to parse the same protocol-versions string over and over.
8158 This should save us a huge number of malloc calls on startup, and
8159 may reduce memory fragmentation with some allocators. Closes
8161 - Remove a needless memset() call from get_token_arguments, thereby
8162 speeding up the tokenization of directory objects by about 20%.
8163 Closes ticket 28852.
8164 - Replace parse_short_policy() with a faster implementation, to
8165 improve microdescriptor parsing time. Closes ticket 28853.
8166 - Speed up directory parsing a little by avoiding use of the non-
8167 inlined strcmp_len() function. Closes ticket 28856.
8168 - Speed up microdescriptor parsing by about 30%, to help improve
8169 startup time. Closes ticket 28839.
8171 o Minor features (pluggable transports):
8172 - Add support for emitting STATUS updates to Tor's control port from
8173 a pluggable transport process. Closes ticket 28846.
8174 - Add support for logging to Tor's logging subsystem from a
8175 pluggable transport process. Closes ticket 28180.
8177 o Minor features (process management):
8178 - Add a new process API for handling child processes. This new API
8179 allows Tor to have bi-directional communication with child
8180 processes on both Unix and Windows. Closes ticket 28179.
8181 - Use the subsystem manager to initialize and shut down the process
8182 module. Closes ticket 28847.
8184 o Minor features (relay):
8185 - When listing relay families, list them in canonical form including
8186 the relay's own identity, and try to give a more useful set of
8187 warnings. Part of ticket 28266 and proposal 298.
8189 o Minor features (required protocols):
8190 - Before exiting because of a missing required protocol, Tor will
8191 now check the publication time of the consensus, and not exit
8192 unless the consensus is newer than the Tor program's own release
8193 date. Previously, Tor would not check the consensus publication
8194 time, and so might exit because of a missing protocol that might
8195 no longer be required in a current consensus. Implements proposal
8196 297; closes ticket 27735.
8198 o Minor features (testing):
8199 - Allow a HeartbeatPeriod of less than 30 minutes in testing Tor
8200 networks. Closes ticket 28840. Patch by Rob Jansen.
8202 o Minor bugfixes (client, clock skew):
8203 - Bootstrap successfully even when Tor's clock is behind the clocks
8204 on the authorities. Fixes bug 28591; bugfix on 0.2.0.9-alpha.
8205 - Select guards even if the consensus has expired, as long as the
8206 consensus is still reasonably live. Fixes bug 24661; bugfix
8209 o Minor bugfixes (compilation):
8210 - Compile correctly on OpenBSD; previously, we were missing some
8211 headers required in order to detect it properly. Fixes bug 28938;
8212 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
8214 o Minor bugfixes (directory clients):
8215 - Mark outdated dirservers when Tor only has a reasonably live
8216 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
8218 o Minor bugfixes (directory mirrors):
8219 - Even when a directory mirror's clock is behind the clocks on the
8220 authorities, we now allow the mirror to serve "future"
8221 consensuses. Fixes bug 28654; bugfix on 0.3.0.1-alpha.
8223 o Minor bugfixes (DNS):
8224 - Gracefully handle an empty or absent resolve.conf file by falling
8225 back to using "localhost" as a DNS server (and hoping it works).
8226 Previously, we would just stop running as an exit. Fixes bug
8227 21900; bugfix on 0.2.1.10-alpha.
8229 o Minor bugfixes (guards):
8230 - In count_acceptable_nodes(), the minimum number is now one bridge
8231 or guard node, and two non-guard nodes for a circuit. Previously,
8232 we had added up the sum of all nodes with a descriptor, but that
8233 could cause us to build failing circuits when we had either too
8234 many bridges or not enough guard nodes. Fixes bug 25885; bugfix on
8235 0.2.3.1-alpha. Patch by Neel Chauhan.
8237 o Minor bugfixes (IPv6):
8238 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
8239 IPv6 socket was bound using an address family of AF_INET instead
8240 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
8243 o Minor bugfixes (logging):
8244 - Rework rep_hist_log_link_protocol_counts() to iterate through all
8245 link protocol versions when logging incoming/outgoing connection
8246 counts. Tor no longer skips version 5, and we won't have to
8247 remember to update this function when new link protocol version is
8248 developed. Fixes bug 28920; bugfix on 0.2.6.10.
8250 o Minor bugfixes (networking):
8251 - Introduce additional checks into tor_addr_parse() to reject
8252 certain incorrect inputs that previously were not detected. Fixes
8253 bug 23082; bugfix on 0.2.0.10-alpha.
8255 o Minor bugfixes (onion service v3, client):
8256 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
8257 connection waiting for a descriptor that we actually have in the
8258 cache. It turns out that this can actually happen, though it is
8259 rare. Now, tor will recover and retry the descriptor. Fixes bug
8260 28669; bugfix on 0.3.2.4-alpha.
8262 o Minor bugfixes (periodic events):
8263 - Refrain from calling routerlist_remove_old_routers() from
8264 check_descriptor_callback(). Instead, create a new hourly periodic
8265 event. Fixes bug 27929; bugfix on 0.2.8.1-alpha.
8267 o Minor bugfixes (pluggable transports):
8268 - Make sure that data is continously read from standard output and
8269 standard error pipes of a pluggable transport child-process, to
8270 avoid deadlocking when a pipe's buffer is full. Fixes bug 26360;
8271 bugfix on 0.2.3.6-alpha.
8273 o Minor bugfixes (unit tests):
8274 - Instead of relying on hs_free_all() to clean up all onion service
8275 objects in test_build_descriptors(), we now deallocate them one by
8276 one. This lets Coverity know that we are not leaking memory there
8277 and fixes CID 1442277. Fixes bug 28989; bugfix on 0.3.5.1-alpha.
8279 o Minor bugfixes (usability):
8280 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
8281 Some users took this phrasing to mean that the mentioned guard was
8282 under their control or responsibility, which it is not. Fixes bug
8283 28895; bugfix on Tor 0.3.0.1-alpha.
8285 o Code simplification and refactoring:
8286 - Reimplement NETINFO cell parsing and generation to rely on
8287 trunnel-generated wire format handling code. Closes ticket 27325.
8288 - Remove unnecessary unsafe code from the Rust macro "cstr!". Closes
8290 - Rework SOCKS wire format handling to rely on trunnel-generated
8291 parsing/generation code. Resolves ticket 27620.
8292 - Split out bootstrap progress reporting from control.c into a
8293 separate file. Part of ticket 27402.
8294 - The .may_include files that we use to describe our directory-by-
8295 directory dependency structure now describe a noncircular
8296 dependency graph over the directories that they cover. Our
8297 checkIncludes.py tool now enforces this noncircularity. Closes
8301 - Mention that you cannot add a new onion service if Tor is already
8302 running with Sandbox enabled. Closes ticket 28560.
8303 - Improve ControlPort documentation. Mention that it accepts
8304 address:port pairs, and can be used multiple times. Closes
8306 - Document the exact output of "tor --version". Closes ticket 28889.
8309 - Stop responding to the 'GETINFO status/version/num-concurring' and
8310 'GETINFO status/version/num-versioning' control port commands, as
8311 those were deprecated back in 0.2.0.30. Also stop listing them in
8312 output of 'GETINFO info/names'. Resolves ticket 28757.
8313 - The scripts used to generate and maintain the list of fallback
8314 directories have been extracted into a new "fallback-scripts"
8315 repository. Closes ticket 27914.
8318 - Run shellcheck for scripts in the in scripts/ directory. Closes
8320 - Add unit tests for tokenize_string() and get_next_token()
8321 functions. Resolves ticket 27625.
8323 o Code simplification and refactoring (onion service v3):
8324 - Consolidate the authorized client descriptor cookie computation
8325 code from client and service into one function. Closes
8328 o Code simplification and refactoring (shell scripts):
8329 - Cleanup scan-build.sh to silence shellcheck warnings. Closes
8331 - Fix issues that shellcheck found in chutney-git-bisect.sh.
8332 Resolves ticket 28006.
8333 - Fix issues that shellcheck found in updateRustDependencies.sh.
8334 Resolves ticket 28012.
8335 - Fix shellcheck warnings in cov-diff script. Resolves issue 28009.
8336 - Fix shellcheck warnings in run_calltool.sh. Resolves ticket 28011.
8337 - Fix shellcheck warnings in run_trunnel.sh. Resolves issue 28010.
8338 - Fix shellcheck warnings in scripts/test/coverage. Resolves
8342 Changes in version 0.3.3.11 - 2019-01-07
8343 Tor 0.3.3.11 backports numerous fixes from later versions of Tor.
8344 numerous fixes, including an important fix for anyone using OpenSSL
8345 1.1.1. Anyone running an earlier version of Tor 0.3.3 should upgrade
8346 to this version, or to a later series.
8348 As a reminder, support the Tor 0.3.3 series will end on 22 Feb 2019.
8349 We anticipate that this will be the last release of Tor 0.3.3, unless
8350 some major bug is before then. Some time between now and then, users
8351 should switch to either the Tor 0.3.4 series (supported until at least
8352 10 June 2019), or the Tor 0.3.5 series, which will receive long-term
8353 support until at least 1 Feb 2022.
8355 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
8356 - Fix our usage of named groups when running as a TLS 1.3 client in
8357 OpenSSL 1.1.1. Previously, we only initialized EC groups when
8358 running as a relay, which caused clients to fail to negotiate TLS
8359 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
8362 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
8363 - Fix a use-after-free error that could be caused by passing Tor an
8364 impossible set of options that would fail during options_act().
8365 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
8367 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
8368 - Only run one online rust build in Travis, to reduce network
8369 errors. Skip offline rust builds on Travis for Linux gcc, because
8370 they're redundant. Implements ticket 27252.
8371 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
8372 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
8373 Linux with default settings, because all the non-default builds
8374 use gcc on Linux. Implements ticket 27252.
8376 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
8377 - Use the Travis Homebrew addon to install packages on macOS during
8378 Travis CI. The package list is the same, but the Homebrew addon
8379 does not do a `brew update` by default. Implements ticket 27738.
8381 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
8382 - Replace the 150 fallbacks originally introduced in Tor
8383 0.3.3.1-alpha in January 2018 (of which ~115 were still
8384 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
8385 removed) generated in December 2018. Closes ticket 24803.
8387 o Minor features (geoip):
8388 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
8389 Country database. Closes ticket 29012.
8391 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
8392 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
8393 key export function from handling long labels. When this bug is
8394 detected, Tor will disable TLS 1.3. We recommend upgrading to a
8395 version of OpenSSL without this bug when it becomes available.
8396 Closes ticket 28973.
8398 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
8399 - Update relay descriptor on bandwidth changes only when the uptime
8400 is smaller than 24h, in order to reduce the efficiency of guard
8401 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
8403 o Minor bugfixes (C correctness, backport from 0.3.5.4-alpha):
8404 - Avoid undefined behavior in an end-of-string check when parsing
8405 the BEGIN line in a directory object. Fixes bug 28202; bugfix
8408 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
8409 - Rewrite our assertion macros so that they no longer suppress the
8410 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
8412 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
8413 - Initialize a variable unconditionally in aes_new_cipher(), since
8414 some compilers cannot tell that we always initialize it before
8415 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
8417 o Minor bugfixes (directory authority, backport from 0.3.5.4-alpha):
8418 - Log additional info when we get a relay that shares an ed25519 ID
8419 with a different relay, instead making a BUG() warning. Fixes bug
8420 27800; bugfix on 0.3.2.1-alpha.
8422 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
8423 - When a user requests a group-readable DataDirectory, give it to
8424 them. Previously, when the DataDirectory and the CacheDirectory
8425 were the same, the default setting (0) for
8426 CacheDirectoryGroupReadable would override the setting for
8427 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
8430 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
8431 - When the onion service directory can't be created or has the wrong
8432 permissions, do not log a stack trace. Fixes bug 27335; bugfix
8435 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
8436 - Close all SOCKS request (for the same .onion) if the newly fetched
8437 descriptor is unusable. Before that, we would close only the first
8438 one leaving the other hanging and let to time out by themselves.
8439 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
8441 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
8442 - Don't warn so loudly when Tor is unable to decode an onion
8443 descriptor. This can now happen as a normal use case if a client
8444 gets a descriptor with client authorization but the client is not
8445 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
8447 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
8448 - When deleting an ephemeral onion service (DEL_ONION), do not close
8449 any rendezvous circuits in order to let the existing client
8450 connections finish by themselves or closed by the application. The
8451 HS v2 is doing that already so now we have the same behavior for
8452 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
8454 o Minor bugfixes (HTTP tunnel):
8455 - Fix a bug warning when closing an HTTP tunnel connection due to
8456 an HTTP request we couldn't handle. Fixes bug 26470; bugfix on
8459 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
8460 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
8461 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
8463 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
8464 - Ensure circuitmux queues are empty before scheduling or sending
8465 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
8467 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
8468 - Reject protocol names containing bytes other than alphanumeric
8469 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
8472 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
8473 - Compute protover votes correctly in the rust version of the
8474 protover code. Previously, the protover rewrite in 24031 allowed
8475 repeated votes from the same voter for the same protocol version
8476 to be counted multiple times in protover_compute_vote(). Fixes bug
8477 27649; bugfix on 0.3.3.5-rc.
8478 - Reject protover names that contain invalid characters. Fixes bug
8479 27687; bugfix on 0.3.3.1-alpha.
8481 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
8482 - protover_all_supported() would attempt to allocate up to 16GB on
8483 some inputs, leading to a potential memory DoS. Fixes bug 27206;
8484 bugfix on 0.3.3.5-rc.
8486 o Minor bugfixes (rust, backport from 0.3.5.4-alpha):
8487 - Fix a potential null dereference in protover_all_supported(). Add
8488 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
8489 - Return a string that can be safely freed by C code, not one
8490 created by the rust allocator, in protover_all_supported(). Fixes
8491 bug 27740; bugfix on 0.3.3.1-alpha.
8492 - Fix an API mismatch in the rust implementation of
8493 protover_compute_vote(). This bug could have caused crashes on any
8494 directory authorities running Tor with Rust (which we do not yet
8495 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
8497 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
8498 - If a unit test running in a subprocess exits abnormally or with a
8499 nonzero status code, treat the test as having failed, even if the
8500 test reported success. Without this fix, memory leaks don't cause
8501 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
8502 bugfix on 0.2.2.4-alpha.
8504 o Minor bugfixes (testing, backport from 0.3.5.4-alpha):
8505 - Treat backtrace test failures as expected on BSD-derived systems
8506 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
8507 (FreeBSD failures have been treated as expected since 18204 in
8508 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
8510 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
8511 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
8512 bugfix on 0.3.0.1-alpha.
8515 Changes in version 0.3.4.10 - 2019-01-07
8516 Tor 0.3.4.9 is the second stable release in its series; it backports
8517 numerous fixes, including an important fix for relays, and for anyone
8518 using OpenSSL 1.1.1. Anyone running an earlier version of Tor 0.3.4
8521 As a reminder, the Tor 0.3.4 series will be supported until 10 June
8522 2019. Some time between now and then, users should switch to the Tor
8523 0.3.5 series, which will receive long-term support until at least 1
8526 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
8527 - Fix our usage of named groups when running as a TLS 1.3 client in
8528 OpenSSL 1.1.1. Previously, we only initialized EC groups when
8529 running as a relay, which caused clients to fail to negotiate TLS
8530 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
8533 o Major bugfixes (relay, directory, backport from 0.3.5.7):
8534 - Always reactivate linked connections in the main loop so long as
8535 any linked connection has been active. Previously, connections
8536 serving directory information wouldn't get reactivated after the
8537 first chunk of data was sent (usually 32KB), which would prevent
8538 clients from bootstrapping. Fixes bug 28912; bugfix on
8539 0.3.4.1-alpha. Patch by "cypherpunks3".
8541 o Minor features (continuous integration, Windows, backport from 0.3.5.6-rc):
8542 - Always show the configure and test logs, and upload them as build
8543 artifacts, when building for Windows using Appveyor CI.
8546 o Minor features (controller, backport from 0.3.5.1-alpha):
8547 - For purposes of CIRC_BW-based dropped cell detection, track half-
8548 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
8549 bias check cells to arrive without counting it as dropped until
8550 either the END arrives, or the windows are empty. Closes
8553 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
8554 - Replace the 150 fallbacks originally introduced in Tor
8555 0.3.3.1-alpha in January 2018 (of which ~115 were still
8556 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
8557 removed) generated in December 2018. Closes ticket 24803.
8559 o Minor features (geoip):
8560 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
8561 Country database. Closes ticket 28395.
8563 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
8564 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
8565 key export function from handling long labels. When this bug is
8566 detected, Tor will disable TLS 1.3. We recommend upgrading to a
8567 version of OpenSSL without this bug when it becomes available.
8568 Closes ticket 28973.
8570 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
8571 - Initialize a variable unconditionally in aes_new_cipher(), since
8572 some compilers cannot tell that we always initialize it before
8573 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
8575 o Minor bugfixes (connection, relay, backport from 0.3.5.5-alpha):
8576 - Avoid a logging a BUG() stacktrace when closing connection held
8577 open because the write side is rate limited but not the read side.
8578 Now, the connection read side is simply shut down until Tor is
8579 able to flush the connection and close it. Fixes bug 27750; bugfix
8582 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.5-alpha):
8583 - Manually configure the zstd compiler options, when building using
8584 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
8585 not come with a pkg-config file. Fixes bug 28454; bugfix
8587 - Stop using an external OpenSSL install, and stop installing MSYS2
8588 packages, when building using mingw on Appveyor Windows CI. Fixes
8589 bug 28399; bugfix on 0.3.4.1-alpha.
8591 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.6-rc):
8592 - Explicitly specify the path to the OpenSSL library and do not
8593 download OpenSSL from Pacman, but instead use the library that is
8594 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
8596 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
8597 - When a user requests a group-readable DataDirectory, give it to
8598 them. Previously, when the DataDirectory and the CacheDirectory
8599 were the same, the default setting (0) for
8600 CacheDirectoryGroupReadable would override the setting for
8601 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
8604 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
8605 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
8606 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
8608 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
8609 - Don't warn so loudly when Tor is unable to decode an onion
8610 descriptor. This can now happen as a normal use case if a client
8611 gets a descriptor with client authorization but the client is not
8612 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
8614 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
8615 - When deleting an ephemeral onion service (DEL_ONION), do not close
8616 any rendezvous circuits in order to let the existing client
8617 connections finish by themselves or closed by the application. The
8618 HS v2 is doing that already so now we have the same behavior for
8619 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
8621 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
8622 - Update relay descriptor on bandwidth changes only when the uptime
8623 is smaller than 24h, in order to reduce the efficiency of guard
8624 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
8626 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
8627 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
8628 bugfix on 0.3.0.1-alpha.
8631 Changes in version 0.3.5.7 - 2019-01-07
8632 Tor 0.3.5.7 is the first stable release in its series; it includes
8633 compilation and portability fixes, and a fix for a severe problem
8634 affecting directory caches.
8636 The Tor 0.3.5 series includes several new features and performance
8637 improvements, including client authorization for v3 onion services,
8638 cleanups to bootstrap reporting, support for improved bandwidth-
8639 measurement tools, experimental support for NSS in place of OpenSSL,
8640 and much more. It also begins a full reorganization of Tor's code
8641 layout, for improved modularity and maintainability in the future.
8642 Finally, there is the usual set of performance improvements and
8643 bugfixes that we try to do in every release series.
8645 There are a couple of changes in the 0.3.5 that may affect
8646 compatibility. First, the default version for newly created onion
8647 services is now v3. Use the HiddenServiceVersion option if you want to
8648 override this. Second, some log messages related to bootstrapping have
8649 changed; if you use stem, you may need to update to the latest version
8650 so it will recognize them.
8652 We have designated 0.3.5 as a "long-term support" (LTS) series: we
8653 will continue to patch major bugs in typical configurations of 0.3.5
8654 until at least 1 Feb 2022. (We do not plan to provide long-term
8655 support for embedding, Rust support, NSS support, running a directory
8656 authority, or unsupported platforms. For these, you will need to stick
8657 with the latest stable release.)
8659 Below are the changes since 0.3.5.6-rc. For a complete list of changes
8660 since 0.3.4.9, see the ReleaseNotes file.
8662 o Major bugfixes (relay, directory):
8663 - Always reactivate linked connections in the main loop so long as
8664 any linked connection has been active. Previously, connections
8665 serving directory information wouldn't get reactivated after the
8666 first chunk of data was sent (usually 32KB), which would prevent
8667 clients from bootstrapping. Fixes bug 28912; bugfix on
8668 0.3.4.1-alpha. Patch by "cypherpunks3".
8670 o Minor features (compilation):
8671 - When possible, place our warning flags in a separate file, to
8672 avoid flooding verbose build logs. Closes ticket 28924.
8674 o Minor features (geoip):
8675 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
8676 Country database. Closes ticket 29012.
8678 o Minor features (OpenSSL bug workaround):
8679 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
8680 key export function from handling long labels. When this bug is
8681 detected, Tor will disable TLS 1.3. We recommend upgrading to a
8682 version of OpenSSL without this bug when it becomes available.
8683 Closes ticket 28973.
8685 o Minor features (performance):
8686 - Remove about 96% of the work from the function that we run at
8687 startup to test our curve25519_basepoint implementation. Since
8688 this function has yet to find an actual failure, we now only run
8689 it for 8 iterations instead of 200. Based on our profile
8690 information, this change should save around 8% of our startup time
8691 on typical desktops, and may have a similar effect on other
8692 platforms. Closes ticket 28838.
8693 - Stop re-validating our hardcoded Diffie-Hellman parameters on
8694 every startup. Doing this wasted time and cycles, especially on
8695 low-powered devices. Closes ticket 28851.
8697 o Minor bugfixes (compilation):
8698 - Fix compilation for Android by adding a missing header to
8699 freespace.c. Fixes bug 28974; bugfix on 0.3.5.1-alpha.
8701 o Minor bugfixes (correctness):
8702 - Fix an unreached code path where we checked the value of
8703 "hostname" inside send_resolved_hostname_cell(). Previously, we
8704 used it before checking it; now we check it first. Fixes bug
8705 28879; bugfix on 0.1.2.7-alpha.
8707 o Minor bugfixes (testing):
8708 - Make sure that test_rebind.py actually obeys its timeout, even
8709 when it receives a large number of log messages. Fixes bug 28883;
8710 bugfix on 0.3.5.4-alpha.
8711 - Stop running stem's unit tests as part of "make test-stem", but
8712 continue to run stem's unit and online tests during "make test-
8713 stem-full". Fixes bug 28568; bugfix on 0.2.6.3-alpha.
8715 o Minor bugfixes (windows services):
8716 - Make Tor start correctly as an NT service again: previously it was
8717 broken by refactoring. Fixes bug 28612; bugfix on 0.3.5.3-alpha.
8719 o Code simplification and refactoring:
8720 - When parsing a port configuration, make it more obvious to static
8721 analyzer tools that we always initialize the address. Closes
8725 Changes in version 0.3.5.6-rc - 2018-12-18
8726 Tor 0.3.5.6-rc fixes numerous small bugs in earlier versions of Tor.
8727 It is the first release candidate in the 0.3.5.x series; if no further
8728 huge bugs are found, our next release may be the stable 0.3.5.x.
8730 o Minor features (continuous integration, Windows):
8731 - Always show the configure and test logs, and upload them as build
8732 artifacts, when building for Windows using Appveyor CI.
8735 o Minor features (fallback directory list):
8736 - Replace the 150 fallbacks originally introduced in Tor
8737 0.3.3.1-alpha in January 2018 (of which ~115 were still
8738 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
8739 removed) generated in December 2018. Closes ticket 24803.
8741 o Minor features (geoip):
8742 - Update geoip and geoip6 to the December 5 2018 Maxmind GeoLite2
8743 Country database. Closes ticket 28744.
8745 o Minor bugfixes (compilation):
8746 - Add missing dependency on libgdi32.dll for tor-print-ed-signing-
8747 cert.exe on Windows. Fixes bug 28485; bugfix on 0.3.5.1-alpha.
8749 o Minor bugfixes (continuous integration, Windows):
8750 - Explicitly specify the path to the OpenSSL library and do not
8751 download OpenSSL from Pacman, but instead use the library that is
8752 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
8754 o Minor bugfixes (onion service v3):
8755 - When deleting an ephemeral onion service (DEL_ONION), do not close
8756 any rendezvous circuits in order to let the existing client
8757 connections finish by themselves or closed by the application. The
8758 HS v2 is doing that already so now we have the same behavior for
8759 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
8761 o Minor bugfixes (restart-in-process, boostrap):
8762 - Add missing resets of bootstrap tracking state when shutting down
8763 (regression caused by ticket 27169). Fixes bug 28524; bugfix
8766 o Minor bugfixes (testing):
8767 - Use a separate DataDirectory for the test_rebind script.
8768 Previously, this script would run using the default DataDirectory,
8769 and sometimes fail. Fixes bug 28562; bugfix on 0.3.5.1-alpha.
8770 Patch from Taylor R Campbell.
8771 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
8772 bugfix on 0.3.0.1-alpha.
8774 o Minor bugfixes (Windows):
8775 - Correctly identify Windows 8.1, Windows 10, and Windows Server
8776 2008 and later from their NT versions. Fixes bug 28096; bugfix on
8777 0.2.2.34; reported by Keifer Bly.
8778 - On recent Windows versions, the GetVersionEx() function may report
8779 an earlier Windows version than the running OS. To avoid user
8780 confusion, add "[or later]" to Tor's version string on affected
8781 versions of Windows. Fixes bug 28096; bugfix on 0.2.2.34; reported
8783 - Remove Windows versions that were never supported by the
8784 GetVersionEx() function. Stop duplicating the latest Windows
8785 version in get_uname(). Fixes bug 28096; bugfix on 0.2.2.34;
8786 reported by Keifer Bly.
8789 - Increase logging and tag all log entries with timestamps in
8790 test_rebind.py. Provides diagnostics for issue 28229.
8792 o Code simplification and refactoring (shared random, dirauth):
8793 - Change many tor_assert() to use BUG() instead. The idea is to not
8794 crash a dirauth but rather scream loudly with a stacktrace and let
8795 it continue run. The shared random subsystem is very resilient and
8796 if anything wrong happens with it, at worst a non coherent value
8797 will be put in the vote and discarded by the other authorities.
8798 Closes ticket 19566.
8800 o Documentation (onion services):
8801 - Document in the man page that changing ClientOnionAuthDir value or
8802 adding a new file in the directory will not work at runtime upon
8803 sending a HUP if Sandbox 1. Closes ticket 28128.
8804 - Note in the man page that the only real way to fully revoke an
8805 onion service v3 client authorization is by restarting the tor
8806 process. Closes ticket 28275.
8809 Changes in version 0.3.5.5-alpha - 2018-11-16
8810 Tor 0.3.5.5-alpha includes numerous bugfixes on earlier releases,
8811 including several that we hope to backport to older release series in
8814 o Major bugfixes (OpenSSL, portability):
8815 - Fix our usage of named groups when running as a TLS 1.3 client in
8816 OpenSSL 1.1.1. Previously, we only initialized EC groups when
8817 running as a relay, which caused clients to fail to negotiate TLS
8818 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
8821 o Minor features (geoip):
8822 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
8823 Country database. Closes ticket 28395.
8825 o Minor bugfixes (compilation):
8826 - Initialize a variable unconditionally in aes_new_cipher(), since
8827 some compilers cannot tell that we always initialize it before
8828 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
8830 o Minor bugfixes (connection, relay):
8831 - Avoid a logging a BUG() stacktrace when closing connection held
8832 open because the write side is rate limited but not the read side.
8833 Now, the connection read side is simply shut down until Tor is
8834 able to flush the connection and close it. Fixes bug 27750; bugfix
8837 o Minor bugfixes (continuous integration, Windows):
8838 - Manually configure the zstd compiler options, when building using
8839 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
8840 not come with a pkg-config file. Fixes bug 28454; bugfix
8842 - Stop using an external OpenSSL install, and stop installing MSYS2
8843 packages, when building using mingw on Appveyor Windows CI. Fixes
8844 bug 28399; bugfix on 0.3.4.1-alpha.
8846 o Minor bugfixes (documentation):
8847 - Make Doxygen work again after the code movement in the 0.3.5
8848 source tree. Fixes bug 28435; bugfix on 0.3.5.1-alpha.
8850 o Minor bugfixes (Linux seccomp2 sandbox):
8851 - Permit the "shutdown()" system call, which is apparently used by
8852 OpenSSL under some circumstances. Fixes bug 28183; bugfix
8855 o Minor bugfixes (logging):
8856 - Stop talking about the Named flag in log messages. Clients have
8857 ignored the Named flag since 0.3.2. Fixes bug 28441; bugfix
8860 o Minor bugfixes (memory leaks):
8861 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
8862 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
8864 o Minor bugfixes (onion services):
8865 - On an intro point for a version 3 onion service, stop closing
8866 introduction circuits on an NACK. This lets the client decide
8867 whether to reuse the circuit or discard it. Previously, we closed
8868 intro circuits when sending NACKs. Fixes bug 27841; bugfix on
8869 0.3.2.1-alpha. Patch by Neel Chaunan.
8870 - When replacing a descriptor in the client cache, make sure to
8871 close all client introduction circuits for the old descriptor, so
8872 we don't end up with unusable leftover circuits. Fixes bug 27471;
8873 bugfix on 0.3.2.1-alpha.
8876 Changes in version 0.3.5.4-alpha - 2018-11-08
8877 Tor 0.3.5.4-alpha includes numerous bugfixes on earlier versions and
8878 improves our continuous integration support. It continues our attempts
8879 to stabilize this alpha branch and build it into a foundation for an
8880 acceptable long-term-support release.
8882 o Major bugfixes (compilation, rust):
8883 - Rust tests can now build and run successfully with the
8884 --enable-fragile-hardening option enabled. Doing this currently
8885 requires the rust beta channel; it will be possible with stable
8886 rust once Rust version 1.31 is released. Patch from Alex Crichton.
8887 Fixes bugs 27272, 27273, and 27274. Bugfix on 0.3.1.1-alpha.
8889 o Major bugfixes (embedding, main loop):
8890 - When DisableNetwork becomes set, actually disable periodic events
8891 that are already enabled. (Previously, we would refrain from
8892 enabling new ones, but we would leave the old ones turned on.)
8893 Fixes bug 28348; bugfix on 0.3.4.1-alpha.
8895 o Minor features (continuous integration):
8896 - Add a Travis CI build for --enable-nss on Linux gcc. Closes
8898 - Add new CI job to Travis configuration to run stem-based
8899 integration tests. Closes ticket 27913.
8901 o Minor features (Windows, continuous integration):
8902 - Build tor on Windows Server 2012 R2 and Windows Server 2016 using
8903 Appveyor's CI. Closes ticket 28318.
8905 o Minor bugfixes (C correctness, also in 0.3.4.9):
8906 - Avoid undefined behavior in an end-of-string check when parsing
8907 the BEGIN line in a directory object. Fixes bug 28202; bugfix
8910 o Minor bugfixes (compilation):
8911 - Fix a pair of missing headers on OpenBSD. Fixes bug 28303; bugfix
8912 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
8914 o Minor bugfixes (compilation, OpenSolaris):
8915 - Fix compilation on OpenSolaris and its descendants by adding a
8916 missing include to compat_pthreads.c. Fixes bug 27963; bugfix
8919 o Minor bugfixes (configuration):
8920 - Refuse to start with relative file paths and RunAsDaemon set
8921 (regression from the fix for bug 22731). Fixes bug 28298; bugfix
8924 o Minor bugfixes (directory authority, also in 0.3.4.9):
8925 - Log additional info when we get a relay that shares an ed25519 ID
8926 with a different relay, instead of a BUG() warning with a
8927 backtrace. Fixes bug 27800; bugfix on 0.3.2.1-alpha.
8929 o Minor bugfixes (onion service v3):
8930 - Build the service descriptor's signing key certificate before
8931 uploading, so we always have a fresh one: leaving no chances for
8932 it to expire service side. Fixes bug 27838; bugfix
8935 o Minor bugfixes (onion service v3, client authorization):
8936 - Fix an assert() when adding a client authorization for the first
8937 time and then sending a HUP signal to the service. Before that,
8938 Tor would stop abruptly. Fixes bug 27995; bugfix on 0.3.5.1-alpha.
8940 o Minor bugfixes (onion services):
8941 - Unless we have explicitly set HiddenServiceVersion, detect the
8942 onion service version and then look for invalid options.
8943 Previously, we did the reverse, but that broke existing configs
8944 which were pointed to a v2 service and had options like
8945 HiddenServiceAuthorizeClient set. Fixes bug 28127; bugfix on
8946 0.3.5.1-alpha. Patch by Neel Chauhan.
8948 o Minor bugfixes (portability):
8949 - Make the OPE code (which is used for v3 onion services) run
8950 correctly on big-endian platforms. Fixes bug 28115; bugfix
8953 o Minor bugfixes (protover, rust):
8954 - Reject extra commas in version strings. Fixes bug 27197; bugfix
8957 o Minor bugfixes (relay shutdown, systemd):
8958 - Notify systemd of ShutdownWaitLength so it can be set to longer
8959 than systemd's TimeoutStopSec. In Tor's systemd service file, set
8960 TimeoutSec to 60 seconds to allow Tor some time to shut down.
8961 Fixes bug 28113; bugfix on 0.2.6.2-alpha.
8963 o Minor bugfixes (rust, also in 0.3.4.9):
8964 - Fix a potential null dereference in protover_all_supported(). Add
8965 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
8966 - Return a string that can be safely freed by C code, not one
8967 created by the rust allocator, in protover_all_supported(). Fixes
8968 bug 27740; bugfix on 0.3.3.1-alpha.
8970 o Minor bugfixes (rust, directory authority, also in 0.3.4.9):
8971 - Fix an API mismatch in the rust implementation of
8972 protover_compute_vote(). This bug could have caused crashes on any
8973 directory authorities running Tor with Rust (which we do not yet
8974 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
8976 o Minor bugfixes (testing):
8977 - Avoid hangs and race conditions in test_rebind.py. Fixes bug
8978 27968; bugfix on 0.3.5.1-alpha.
8980 o Minor bugfixes (testing, also in 0.3.4.9):
8981 - Treat backtrace test failures as expected on BSD-derived systems
8982 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
8983 (FreeBSD failures have been treated as expected since 18204 in
8984 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
8986 o Documentation (onion service manpage):
8987 - Improve HSv3 client authorization by making some options more
8988 explicit and detailed. Closes ticket 28026. Patch by Mike Tigas.
8991 Changes in version 0.3.4.9 - 2018-11-02
8992 Tor 0.3.4.9 is the second stable release in its series; it backports
8993 numerous fixes, including a fix for a bandwidth management bug that
8994 was causing memory exhaustion on relays. Anyone running an earlier
8995 version of Tor 0.3.4.9 should upgrade.
8997 o Major bugfixes (compilation, backport from 0.3.5.3-alpha):
8998 - Fix compilation on ARM (and other less-used CPUs) when compiling
8999 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
9001 o Major bugfixes (mainloop, bootstrap, backport from 0.3.5.3-alpha):
9002 - Make sure Tor bootstraps and works properly if only the
9003 ControlPort is set. Prior to this fix, Tor would only bootstrap
9004 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
9005 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
9007 o Major bugfixes (relay, backport from 0.3.5.3-alpha):
9008 - When our write bandwidth limit is exhausted, stop writing on the
9009 connection. Previously, we had a typo in the code that would make
9010 us stop reading instead, leading to relay connections being stuck
9011 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
9014 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
9015 - Fix a use-after-free error that could be caused by passing Tor an
9016 impossible set of options that would fail during options_act().
9017 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
9019 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
9020 - Don't do a distcheck with --disable-module-dirauth in Travis.
9021 Implements ticket 27252.
9022 - Only run one online rust build in Travis, to reduce network
9023 errors. Skip offline rust builds on Travis for Linux gcc, because
9024 they're redundant. Implements ticket 27252.
9025 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
9026 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
9027 Linux with default settings, because all the non-default builds
9028 use gcc on Linux. Implements ticket 27252.
9030 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
9031 - Use the Travis Homebrew addon to install packages on macOS during
9032 Travis CI. The package list is the same, but the Homebrew addon
9033 does not do a `brew update` by default. Implements ticket 27738.
9035 o Minor features (geoip):
9036 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
9037 Country database. Closes ticket 27991.
9039 o Minor bugfixes (32-bit OSX and iOS, timing, backport from 0.3.5.2-alpha):
9040 - Fix an integer overflow bug in our optimized 32-bit millisecond-
9041 difference algorithm for 32-bit Apple platforms. Previously, it
9042 would overflow when calculating the difference between two times
9043 more than 47 days apart. Fixes part of bug 27139; bugfix
9045 - Improve the precision of our 32-bit millisecond difference
9046 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
9047 bugfix on 0.3.4.1-alpha.
9048 - Relax the tolerance on the mainloop/update_time_jumps test when
9049 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
9052 o Minor bugfixes (C correctness, to appear in 0.3.5.4-alpha):
9053 - Avoid undefined behavior in an end-of-string check when parsing
9054 the BEGIN line in a directory object. Fixes bug 28202; bugfix
9057 o Minor bugfixes (CI, appveyor, to appear in 0.3.5.4-alpha):
9058 - Only install the necessary mingw packages during our appveyor
9059 builds. This change makes the build a little faster, and prevents
9060 a conflict with a preinstalled mingw openssl that appveyor now
9061 ships. Fixes bugs 27943 and 27765; bugfix on 0.3.4.2-alpha.
9063 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
9064 - Rewrite our assertion macros so that they no longer suppress the
9065 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
9067 o Minor bugfixes (continuous integration, backport from 0.3.5.1-alpha):
9068 - Stop reinstalling identical packages in our Windows CI. Fixes bug
9069 27464; bugfix on 0.3.4.1-alpha.
9071 o Minor bugfixes (directory authority, to appear in 0.3.5.4-alpha):
9072 - Log additional info when we get a relay that shares an ed25519 ID
9073 with a different relay, instead making a BUG() warning. Fixes bug
9074 27800; bugfix on 0.3.2.1-alpha.
9076 o Minor bugfixes (directory connection shutdown, backport from 0.3.5.1-alpha):
9077 - Avoid a double-close when shutting down a stalled directory
9078 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
9080 o Minor bugfixes (HTTP tunnel, backport from 0.3.5.1-alpha):
9081 - Fix a bug warning when closing an HTTP tunnel connection due to an
9082 HTTP request we couldn't handle. Fixes bug 26470; bugfix
9085 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
9086 - Ensure circuitmux queues are empty before scheduling or sending
9087 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
9089 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
9090 - When the onion service directory can't be created or has the wrong
9091 permissions, do not log a stack trace. Fixes bug 27335; bugfix
9094 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
9095 - Close all SOCKS request (for the same .onion) if the newly fetched
9096 descriptor is unusable. Before that, we would close only the first
9097 one leaving the other hanging and let to time out by themselves.
9098 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
9100 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
9101 - When selecting a v3 rendezvous point, don't only look at the
9102 protover, but also check whether the curve25519 onion key is
9103 present. This way we avoid picking a relay that supports the v3
9104 rendezvous but for which we don't have the microdescriptor. Fixes
9105 bug 27797; bugfix on 0.3.2.1-alpha.
9107 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
9108 - Reject protocol names containing bytes other than alphanumeric
9109 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
9112 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
9113 - Compute protover votes correctly in the rust version of the
9114 protover code. Previously, the protover rewrite in 24031 allowed
9115 repeated votes from the same voter for the same protocol version
9116 to be counted multiple times in protover_compute_vote(). Fixes bug
9117 27649; bugfix on 0.3.3.5-rc.
9118 - Reject protover names that contain invalid characters. Fixes bug
9119 27687; bugfix on 0.3.3.1-alpha.
9121 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
9122 - protover_all_supported() would attempt to allocate up to 16GB on
9123 some inputs, leading to a potential memory DoS. Fixes bug 27206;
9124 bugfix on 0.3.3.5-rc.
9126 o Minor bugfixes (rust, directory authority, to appear in 0.3.5.4-alpha):
9127 - Fix an API mismatch in the rust implementation of
9128 protover_compute_vote(). This bug could have caused crashes on any
9129 directory authorities running Tor with Rust (which we do not yet
9130 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
9132 o Minor bugfixes (rust, to appear in 0.3.5.4-alpha):
9133 - Fix a potential null dereference in protover_all_supported(). Add
9134 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
9135 - Return a string that can be safely freed by C code, not one
9136 created by the rust allocator, in protover_all_supported(). Fixes
9137 bug 27740; bugfix on 0.3.3.1-alpha.
9139 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
9140 - If a unit test running in a subprocess exits abnormally or with a
9141 nonzero status code, treat the test as having failed, even if the
9142 test reported success. Without this fix, memory leaks don't cause
9143 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
9144 bugfix on 0.2.2.4-alpha.
9146 o Minor bugfixes (testing, backport from 0.3.5.3-alpha):
9147 - Make the hs_service tests use the same time source when creating
9148 the introduction point and when testing it. Now tests work better
9149 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
9152 o Minor bugfixes (testing, to appear in 0.3.5.4-alpha):
9153 - Treat backtrace test failures as expected on BSD-derived systems
9154 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
9155 (FreeBSD failures have been treated as expected since 18204 in
9156 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
9159 Changes in version 0.3.5.3-alpha - 2018-10-17
9160 Tor 0.3.5.3-alpha fixes several bugs, mostly from previous 0.3.5.x
9161 versions. One important fix for relays addresses a problem with rate-
9162 limiting code from back in 0.3.4.x: If the fix works out, we'll be
9163 backporting it soon. This release is still an alpha, but we hope it's
9164 getting closer and closer to stability.
9166 o Major features (onion services):
9167 - Version 3 onion services can now use the per-service
9168 HiddenServiceExportCircuitID option to differentiate client
9169 circuits. It communicates with the service by using the HAProxy
9170 protocol to assign virtual IP addresses to inbound client
9171 circuits. Closes ticket 4700. Patch by Mahrud Sayrafi.
9173 o Major bugfixes (compilation):
9174 - Fix compilation on ARM (and other less-used CPUs) when compiling
9175 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
9177 o Major bugfixes (initialization, crash):
9178 - Fix an assertion crash that would stop Tor from starting up if it
9179 tried to activate a periodic event too early. Fixes bug 27861;
9180 bugfix on 0.3.5.1-alpha.
9182 o Major bugfixes (mainloop, bootstrap):
9183 - Make sure Tor bootstraps and works properly if only the
9184 ControlPort is set. Prior to this fix, Tor would only bootstrap
9185 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
9186 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
9188 o Major bugfixes (relay):
9189 - When our write bandwidth limit is exhausted, stop writing on the
9190 connection. Previously, we had a typo in the code that would make
9191 us stop reading instead, leading to relay connections being stuck
9192 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
9195 o Minor features (continuous integration):
9196 - Use the Travis Homebrew addon to install packages on macOS during
9197 Travis CI. The package list is the same, but the Homebrew addon
9198 does not do a `brew update` by default. Implements ticket 27738.
9199 - Report what program produced the mysterious core file that we
9200 occasionally see on Travis CI during make distcheck. Closes
9203 o Minor features (geoip):
9204 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
9205 Country database. Closes ticket 27991.
9207 o Minor bugfixes (code safety):
9208 - Rewrite our assertion macros so that they no longer suppress the
9209 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
9212 o Minor bugfixes (compilation):
9213 - Compile the ed25519-donna code with a correct declaration of
9214 crypto_strongest_rand(). Previously, we built it with one type,
9215 but linked it against another in the unit tests, which caused
9216 compilation failures with LTO enabled. This could have caused
9217 other undefined behavior in the tests. Fixes bug 27728; bugfix
9220 o Minor bugfixes (compilation, netbsd):
9221 - Add a missing include back into procmon.c. Fixes bug 27990; bugfix
9224 o Minor bugfixes (continuous integration, appveyor):
9225 - Install only the necessary mingw packages during our appveyor
9226 builds. This change makes the build a little faster, and prevents
9227 a conflict with a preinstalled mingw openssl that appveyor now
9228 ships. Fixes bugs 27765 and 27943; bugfix on 0.3.4.2-alpha.
9230 o Minor bugfixes (directory permissions):
9231 - When a user requests a group-readable DataDirectory, give it to
9232 them. Previously, when the DataDirectory and the CacheDirectory
9233 were the same, the default setting (0) for
9234 CacheDirectoryGroupReadable would override the setting for
9235 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
9238 o Minor bugfixes (memory leaks):
9239 - Fix a small memory leak when calling Tor with --dump-config. Fixes
9240 bug 27893; bugfix on 0.3.2.1-alpha.
9242 o Minor bugfixes (networking):
9243 - In retry_listeners_ports(), make sure that we're removing a member
9244 of old_conns smartlist at most once. Fixes bug 27808; bugfix
9246 - Refrain from attempting socket rebinding when old and new
9247 listeners are in different address families. Fixes bug 27928;
9248 bugfix on 0.3.5.1-alpha.
9250 o Minor bugfixes (onion service v3):
9251 - Stop dumping a stack trace when trying to connect to an intro
9252 point without having a descriptor for it. Fixes bug 27774; bugfix
9254 - Don't warn so loudly when Tor is unable to decode an onion
9255 descriptor. This can now happen as a normal use case if a client
9256 gets a descriptor with client authorization but the client is not
9257 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
9258 - When selecting a v3 rendezvous point, don't only look at the
9259 protover, but also check whether the curve25519 onion key is
9260 present. This way we avoid picking a relay that supports the v3
9261 rendezvous but for which we don't have the microdescriptor. Fixes
9262 bug 27797; bugfix on 0.3.2.1-alpha.
9264 o Minor bugfixes (protover):
9265 - Reject protocol names containing bytes other than alphanumeric
9266 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
9269 o Minor bugfixes (testing):
9270 - Make the hs_service tests use the same time source when creating
9271 the introduction point and when testing it. Now tests work better
9272 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
9274 - In test_rebind.py, check if the Python version is in the supported
9275 range. Fixes bug 27675; bugfix on 0.3.5.1-alpha.
9277 o Code simplification and refactoring:
9278 - Divide more large Tor source files -- especially ones that span
9279 multiple areas of functionality -- into smaller parts, including
9280 onion.c and main.c. Closes ticket 26747.
9281 - Divide the "routerparse.c" module into separate modules for each
9282 group of parsed objects. Closes ticket 27924.
9283 - Move protover_rust.c to the same place protover.c was moved to.
9284 Closes ticket 27814.
9285 - Split directory.c into separate pieces for client, server, and
9286 common functionality. Closes ticket 26744.
9287 - Split the non-statistics-related parts from the rephist.c and
9288 geoip.c modules. Closes ticket 27892.
9289 - Split the router.c file into relay-only and shared components, to
9290 help with future modularization. Closes ticket 27864.
9293 - In the tor-resolve(1) manpage, fix the reference to socks-
9294 extensions.txt by adding a web URL. Resolves ticket 27853.
9295 - Mention that we require Python to be 2.7 or newer for some
9296 integration tests that we ship with Tor. Resolves ticket 27677.
9299 Changes in version 0.3.5.2-alpha - 2018-09-21
9300 Tor 0.3.5.2-alpha fixes several bugs in 0.3.5.1-alpha, including one
9301 that made Tor think it had run out of sockets. Anybody running a relay
9302 or an onion service on 0.3.5.1-alpha should upgrade.
9304 o Major bugfixes (relay bandwidth statistics):
9305 - When we close relayed circuits, report the data in the circuit
9306 queues as being written in our relay bandwidth stats. This
9307 mitigates guard discovery and other attacks that close circuits
9308 for the explicit purpose of noticing this discrepancy in
9309 statistics. Fixes bug 23512; bugfix on 0.0.8pre3.
9311 o Major bugfixes (socket accounting):
9312 - In our socket accounting code, count a socket as closed even when
9313 it is closed indirectly by the TLS layer. Previously, we would
9314 count these sockets as still in use, and incorrectly believe that
9315 we had run out of sockets. Fixes bug 27795; bugfix
9318 o Minor bugfixes (32-bit OSX and iOS, timing):
9319 - Fix an integer overflow bug in our optimized 32-bit millisecond-
9320 difference algorithm for 32-bit Apple platforms. Previously, it
9321 would overflow when calculating the difference between two times
9322 more than 47 days apart. Fixes part of bug 27139; bugfix
9324 - Improve the precision of our 32-bit millisecond difference
9325 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
9326 bugfix on 0.3.4.1-alpha.
9327 - Relax the tolerance on the mainloop/update_time_jumps test when
9328 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
9331 o Minor bugfixes (onion service v3):
9332 - Close all SOCKS request (for the same .onion) if the newly fetched
9333 descriptor is unusable. Before that, we would close only the first
9334 one leaving the other hanging and let to time out by themselves.
9335 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
9337 o Minor bugfixes (memory leak):
9338 - Fix an unlikely memory leak when trying to read a private key from
9339 a ridiculously large file. Fixes bug 27764; bugfix on
9340 0.3.5.1-alpha. This is CID 1439488.
9342 o Minor bugfixes (NSS):
9343 - Correctly detect failure to open a dummy TCP socket when stealing
9344 ownership of an fd from the NSS layer. Fixes bug 27782; bugfix
9347 o Minor bugfixes (rust):
9348 - protover_all_supported() would attempt to allocate up to 16GB on
9349 some inputs, leading to a potential memory DoS. Fixes bug 27206;
9350 bugfix on 0.3.3.5-rc.
9352 o Minor bugfixes (testing):
9353 - Revise the "conditionvar_timeout" test so that it succeeds even on
9354 heavily loaded systems where the test threads are not scheduled
9355 within 200 msec. Fixes bug 27073; bugfix on 0.2.6.3-alpha.
9357 o Code simplification and refactoring:
9358 - Divide the routerlist.c and dirserv.c modules into smaller parts.
9359 Closes ticket 27799.
9362 Changes in version 0.3.5.1-alpha - 2018-09-18
9363 Tor 0.3.5.1-alpha is the first release of the 0.3.5.x series. It adds
9364 client authorization for modern (v3) onion services, improves
9365 bootstrap reporting, begins reorganizing Tor's codebase, adds optional
9366 support for NSS in place of OpenSSL, and much more.
9368 o Major features (onion services, UI change):
9369 - For a newly created onion service, the default version is now 3.
9370 Tor still supports existing version 2 services, but the operator
9371 now needs to set "HiddenServiceVersion 2" in order to create a new
9372 version 2 service. For existing services, Tor now learns the
9373 version by reading the key file. Closes ticket 27215.
9375 o Major features (relay, UI change):
9376 - Relays no longer run as exits by default. If the "ExitRelay"
9377 option is auto (or unset), and no exit policy is specified with
9378 ExitPolicy or ReducedExitPolicy, we now treat ExitRelay as 0.
9379 Previously in this case, we allowed exit traffic and logged a
9380 warning message. Closes ticket 21530. Patch by Neel Chauhan.
9381 - Tor now validates that the ContactInfo config option is valid UTF-
9382 8 when parsing torrc. Closes ticket 27428.
9384 o Major features (bootstrap):
9385 - Don't report directory progress until after a connection to a
9386 relay or bridge has succeeded. Previously, we'd report 80%
9387 progress based on cached directory information when we couldn't
9388 even connect to the network. Closes ticket 27169.
9390 o Major features (new code layout):
9391 - Nearly all of Tor's source code has been moved around into more
9392 logical places. The "common" directory is now divided into a set
9393 of libraries in "lib", and files in the "or" directory have been
9394 split into "core" (logic absolutely needed for onion routing),
9395 "feature" (independent modules in Tor), and "app" (to configure
9396 and invoke the rest of Tor). See doc/HACKING/CodeStructure.md for
9397 more information. Closes ticket 26481.
9399 This refactoring is not complete: although the libraries have been
9400 refactored to be acyclic, the main body of Tor is still too
9401 interconnected. We will attempt to improve this in the future.
9403 o Major features (onion services v3):
9404 - Implement onion service client authorization at the descriptor
9405 level: only authorized clients can decrypt a service's descriptor
9406 to find out how to contact it. A new torrc option was added to
9407 control this client side: ClientOnionAuthDir <path>. On the
9408 service side, if the "authorized_clients/" directory exists in the
9409 onion service directory path, client configurations are read from
9410 the files within. See the manpage for more details. Closes ticket
9411 27547. Patch done by Suphanat Chunhapanya (haxxpop).
9412 - Improve revision counter generation in next-gen onion services.
9413 Onion services can now scale by hosting multiple instances on
9414 different hosts without synchronization between them, which was
9415 previously impossible because descriptors would get rejected by
9416 HSDirs. Addresses ticket 25552.
9418 o Major features (portability, cryptography, experimental, TLS):
9419 - Tor now has the option to compile with the NSS library instead of
9420 OpenSSL. This feature is experimental, and we expect that bugs may
9421 remain. It is mainly intended for environments where Tor's
9422 performance is not CPU-bound, and where NSS is already known to be
9423 installed. To try it out, configure Tor with the --enable-nss
9424 flag. Closes tickets 26631, 26815, and 26816.
9426 If you are experimenting with this option and using an old cached
9427 consensus, Tor may fail to start. To solve this, delete your
9428 "cached-consensus" and "cached-microdesc-consensus" files,
9429 (if present), and restart Tor.
9431 o Major bugfixes (directory authority):
9432 - Actually check that the address we get from DirAuthority
9433 configuration line is valid IPv4. Explicitly disallow DirAuthority
9434 address to be a DNS hostname. Fixes bug 26488; bugfix
9437 o Major bugfixes (restart-in-process):
9438 - Fix a use-after-free error that could be caused by passing Tor an
9439 impossible set of options that would fail during options_act().
9440 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
9442 o Minor features (admin tools):
9443 - Add a new --key-expiration option to print the expiration date of
9444 the signing cert in an ed25519_signing_cert file. Resolves
9447 o Minor features (build):
9448 - If you pass the "--enable-pic" option to configure, Tor will try
9449 to tell the compiler to build position-independent code suitable
9450 to link into a dynamic library. (The default remains -fPIE, for
9451 code suitable for a relocatable executable.) Closes ticket 23846.
9453 o Minor features (code correctness, testing):
9454 - Tor's build process now includes a "check-includes" make target to
9455 verify that no module of Tor relies on any headers from a higher-
9456 level module. We hope to use this feature over time to help
9457 refactor our codebase. Closes ticket 26447.
9459 o Minor features (code layout):
9460 - We have a new "lowest-level" error-handling API for use by code
9461 invoked from within the logging module. With this interface, the
9462 logging code is no longer at risk of calling into itself if a
9463 failure occurs while it is trying to log something. Closes
9466 o Minor features (compilation):
9467 - Tor's configure script now supports a --with-malloc= option to
9468 select your malloc implementation. Supported options are
9469 "tcmalloc", "jemalloc", "openbsd" (deprecated), and "system" (the
9470 default). Addresses part of ticket 20424. Based on a patch from
9473 o Minor features (config):
9474 - The "auto" keyword in torrc is now case-insensitive. Closes
9477 o Minor features (continuous integration):
9478 - Don't do a distcheck with --disable-module-dirauth in Travis.
9479 Implements ticket 27252.
9480 - Install libcap-dev and libseccomp2-dev so these optional
9481 dependencies get tested on Travis CI. Closes ticket 26560.
9482 - Only run one online rust build in Travis, to reduce network
9483 errors. Skip offline rust builds on Travis for Linux gcc, because
9484 they're redundant. Implements ticket 27252.
9485 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
9486 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
9487 Linux with default settings, because all the non-default builds
9488 use gcc on Linux. Implements ticket 27252.
9490 o Minor features (controller):
9491 - Emit CIRC_BW events as soon as we detect that we processed an
9492 invalid or otherwise dropped cell on a circuit. This allows
9493 vanguards and other controllers to react more quickly to dropped
9494 cells. Closes ticket 27678.
9495 - For purposes of CIRC_BW-based dropped cell detection, track half-
9496 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
9497 bias check cells to arrive without counting it as dropped until
9498 either the END arrives, or the windows are empty. Closes
9500 - Implement a 'GETINFO md/all' controller command to enable getting
9501 all known microdescriptors. Closes ticket 8323.
9502 - The GETINFO command now support an "uptime" argument, to return
9503 Tor's uptime in seconds. Closes ticket 25132.
9505 o Minor features (denial-of-service avoidance):
9506 - Make our OOM handler aware of the DNS cache so that it doesn't
9507 fill up the memory. This check is important for our DoS mitigation
9508 subsystem. Closes ticket 18642. Patch by Neel Chauhan.
9510 o Minor features (development):
9511 - Tor's makefile now supports running the "clippy" Rust style tool
9512 on our Rust code. Closes ticket 22156.
9514 o Minor features (directory authority):
9515 - There is no longer an artificial upper limit on the length of
9516 bandwidth lines. Closes ticket 26223.
9517 - When a bandwidth file is used to obtain the bandwidth measurements,
9518 include this bandwidth file headers in the votes. Closes
9520 - Improved support for networks with only a single authority or a
9521 single fallback directory. Patch from Gabriel Somlo. Closes
9524 o Minor features (embedding API):
9525 - The Tor controller API now supports a function to launch Tor with
9526 a preconstructed owning controller FD, so that embedding
9527 applications don't need to manage controller ports and
9528 authentication. Closes ticket 24204.
9529 - The Tor controller API now has a function that returns the name
9530 and version of the backend implementing the API. Closes
9533 o Minor features (geoip):
9534 - Update geoip and geoip6 to the September 6 2018 Maxmind GeoLite2
9535 Country database. Closes ticket 27631.
9537 o Minor features (memory management):
9538 - Get Libevent to use the same memory allocator as Tor, by calling
9539 event_set_mem_functions() during initialization. Resolves
9542 o Minor features (memory usage):
9543 - When not using them, store legacy TAP public onion keys in DER-
9544 encoded format, rather than as expanded public keys. This should
9545 save several megabytes on typical clients. Closes ticket 27246.
9547 o Minor features (OpenSSL):
9548 - When possible, use RFC5869 HKDF implementation from OpenSSL rather
9549 than our own. Resolves ticket 19979.
9551 o Minor features (Rust, code quality):
9552 - Improve rust code quality in the rust protover implementation by
9553 making it more idiomatic. Includes changing an internal API to
9554 take &str instead of &String. Closes ticket 26492.
9556 o Minor features (testing):
9557 - Add scripts/test/chutney-git-bisect.sh, for bisecting using
9558 chutney. Implements ticket 27211.
9560 o Minor features (tor-resolve):
9561 - The tor-resolve utility can now be used with IPv6 SOCKS proxies.
9562 Side-effect of the refactoring for ticket 26526.
9564 o Minor features (UI):
9565 - Log each included configuration file or directory as we read it,
9566 to provide more visibility about where Tor is reading from. Patch
9567 from Unto Sten; closes ticket 27186.
9568 - Lower log level of "Scheduler type KIST has been enabled" to INFO.
9569 Closes ticket 26703.
9571 o Minor bugfixes (bootstrap):
9572 - Try harder to get descriptors in non-exit test networks, by using
9573 the mid weight for the third hop when there are no exits. Fixes
9574 bug 27237; bugfix on 0.2.6.2-alpha.
9576 o Minor bugfixes (C correctness):
9577 - Avoid casting smartlist index to int implicitly, as it may trigger
9578 a warning (-Wshorten-64-to-32). Fixes bug 26282; bugfix on
9579 0.2.3.13-alpha, 0.2.7.1-alpha and 0.2.1.1-alpha.
9580 - Use time_t for all values in
9581 predicted_ports_prediction_time_remaining(). Rework the code that
9582 computes difference between durations/timestamps. Fixes bug 27165;
9583 bugfix on 0.3.1.1-alpha.
9585 o Minor bugfixes (client, memory usage):
9586 - When not running as a directory cache, there is no need to store
9587 the text of the current consensus networkstatus in RAM.
9588 Previously, however, clients would store it anyway, at a cost of
9589 over 5 MB. Now, they do not. Fixes bug 27247; bugfix
9592 o Minor bugfixes (client, reachableaddresses):
9593 - Instead of adding a "reject *:*" line to ReachableAddresses when
9594 loading the configuration, add one to the policy after parsing it
9595 in parse_reachable_addresses(). This prevents extra "reject *.*"
9596 lines from accumulating on reloads. Fixes bug 20874; bugfix on
9597 0.1.1.5-alpha. Patch by Neel Chauhan.
9599 o Minor bugfixes (code quality):
9600 - Rename sandbox_getaddrinfo() and other functions to no longer
9601 misleadingly suggest that they are sandbox-only. Fixes bug 26525;
9602 bugfix on 0.2.7.1-alpha.
9604 o Minor bugfixes (configuration, Onion Services):
9605 - In rend_service_parse_port_config(), disallow any input to remain
9606 after address-port pair was parsed. This will catch address and
9607 port being whitespace-separated by mistake of the user. Fixes bug
9608 27044; bugfix on 0.2.9.10.
9610 o Minor bugfixes (continuous integration):
9611 - Stop reinstalling identical packages in our Windows CI. Fixes bug
9612 27464; bugfix on 0.3.4.1-alpha.
9614 o Minor bugfixes (controller):
9615 - Consider all routerinfo errors other than "not a server" to be
9616 transient for the purpose of "GETINFO exit-policy/*" controller
9617 request. Print stacktrace in the unlikely case of failing to
9618 recompute routerinfo digest. Fixes bug 27034; bugfix
9621 o Minor bugfixes (directory connection shutdown):
9622 - Avoid a double-close when shutting down a stalled directory
9623 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
9625 o Minor bugfixes (HTTP tunnel):
9626 - Fix a bug warning when closing an HTTP tunnel connection due to an
9627 HTTP request we couldn't handle. Fixes bug 26470; bugfix
9630 o Minor bugfixes (ipv6):
9631 - In addrs_in_same_network_family(), we choose the subnet size based
9632 on the IP version (IPv4 or IPv6). Previously, we chose a fixed
9633 subnet size of /16 for both IPv4 and IPv6 addresses. Fixes bug
9634 15518; bugfix on 0.2.3.1-alpha. Patch by Neel Chauhan.
9636 o Minor bugfixes (logging):
9637 - As a precaution, do an early return from log_addr_has_changed() if
9638 Tor is running as client. Also, log a stack trace for debugging as
9639 this function should only be called when Tor runs as server. Fixes
9640 bug 26892; bugfix on 0.1.1.9-alpha.
9641 - Refrain from mentioning bug 21018 in the logs, as it is already
9642 fixed. Fixes bug 25477; bugfix on 0.2.9.8.
9644 o Minor bugfixes (logging, documentation):
9645 - When SafeLogging is enabled, scrub IP address in
9646 channel_tls_process_netinfo_cell(). Also, add a note to manpage
9647 that scrubbing is not guaranteed on loglevels below Notice. Fixes
9648 bug 26882; bugfix on 0.2.4.10-alpha.
9650 o Minor bugfixes (netflow padding):
9651 - Ensure circuitmux queues are empty before scheduling or sending
9652 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
9654 o Minor bugfixes (onion service v2):
9655 - Log at level "info", not "warning", in the case that we do not
9656 have a consensus when a .onion request comes in. This can happen
9657 normally while bootstrapping. Fixes bug 27040; bugfix
9660 o Minor bugfixes (onion service v3):
9661 - When the onion service directory can't be created or has the wrong
9662 permissions, do not log a stack trace. Fixes bug 27335; bugfix
9665 o Minor bugfixes (OS compatibility):
9666 - Properly handle configuration changes that move a listener to/from
9667 wildcard IP address. If the first attempt to bind a socket fails,
9668 close the old listener and try binding the socket again. Fixes bug
9669 17873; bugfix on 0.0.8pre-1.
9671 o Minor bugfixes (performance)::
9672 - Rework node_is_a_configured_bridge() to no longer call
9673 node_get_all_orports(), which was performing too many memory
9674 allocations. Fixes bug 27224; bugfix on 0.2.3.9.
9676 o Minor bugfixes (relay statistics):
9677 - Update relay descriptor on bandwidth changes only when the uptime
9678 is smaller than 24h, in order to reduce the efficiency of guard
9679 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
9681 o Minor bugfixes (relays):
9682 - Consider the fact that we'll be making direct connections to our
9683 entry and guard nodes when computing the fraction of nodes that
9684 have their descriptors. Also, if we are using bridges and there is
9685 at least one bridge with a full descriptor, treat the fraction of
9686 guards available as 100%. Fixes bug 25886; bugfix on 0.2.4.10-alpha.
9687 Patch by Neel Chauhan.
9688 - Update the message logged on relays when DirCache is disabled.
9689 Since 0.3.3.5-rc, authorities require DirCache (V2Dir) for the
9690 Guard flag. Fixes bug 24312; bugfix on 0.3.3.5-rc.
9692 o Minor bugfixes (rust, protover):
9693 - Compute protover votes correctly in the rust version of the
9694 protover code. Previously, the protover rewrite in 24031 allowed
9695 repeated votes from the same voter for the same protocol version
9696 to be counted multiple times in protover_compute_vote(). Fixes bug
9697 27649; bugfix on 0.3.3.5-rc.
9698 - Reject protover names that contain invalid characters. Fixes bug
9699 27687; bugfix on 0.3.3.1-alpha.
9701 o Minor bugfixes (testing):
9702 - Fix two unit tests to work when HOME environment variable is not
9703 set. Fixes bug 27096; bugfix on 0.2.8.1-alpha.
9704 - If a unit test running in a subprocess exits abnormally or with a
9705 nonzero status code, treat the test as having failed, even if the
9706 test reported success. Without this fix, memory leaks don't cause
9707 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
9708 bugfix on 0.2.2.4-alpha.
9709 - When logging a version mismatch in our openssl_version tests,
9710 report the actual offending version strings. Fixes bug 26152;
9711 bugfix on 0.2.9.1-alpha.
9712 - Fix forking tests on Windows when there is a space somewhere in
9713 the path. Fixes bug 26437; bugfix on 0.2.2.4-alpha.
9715 o Code simplification and refactoring:
9716 - 'updateFallbackDirs.py' now ignores the blacklist file, as it's not
9717 longer needed. Closes ticket 26502.
9718 - Include paths to header files within Tor are now qualified by
9719 directory within the top-level src directory.
9720 - Many structures have been removed from the centralized "or.h"
9721 header, and moved into their own headers. This will allow us to
9722 reduce the number of places in the code that rely on each
9723 structure's contents and layout. Closes ticket 26383.
9724 - Remove ATTR_NONNULL macro from codebase. Resolves ticket 26527.
9725 - Remove GetAdaptersAddresses_fn_t. The code that used it was
9726 removed as part of the 26481 refactor. Closes ticket 27467.
9727 - Rework Tor SOCKS server code to use Trunnel and benefit from
9728 autogenerated functions for parsing and generating SOCKS wire
9729 format. New implementation is cleaner, more maintainable and
9730 should be less prone to heartbleed-style vulnerabilities.
9731 Implements a significant fraction of ticket 3569.
9732 - Split sampled_guards_update_from_consensus() and
9733 select_entry_guard_for_circuit() into subfunctions. In
9734 entry_guards_update_primary() unite three smartlist enumerations
9735 into one and move smartlist comparison code out of the function.
9736 Closes ticket 21349.
9737 - Tor now assumes that you have standards-conformant stdint.h and
9738 inttypes.h headers when compiling. Closes ticket 26626.
9739 - Unify our bloom filter logic. Previously we had two copies of this
9740 code: one for routerlist filtering, and one for address set
9741 calculations. Closes ticket 26510.
9742 - Use the simpler strcmpstart() helper in
9743 rend_parse_v2_service_descriptor instead of strncmp(). Closes
9745 - Utility functions that can perform a DNS lookup are now wholly
9746 separated from those that can't, in separate headers and C
9747 modules. Closes ticket 26526.
9750 - Copy paragraph and URL to Tor's code of conduct document from
9751 CONTRIBUTING to new CODE_OF_CONDUCT file. Resolves ticket 26638.
9752 - Remove old instructions from INSTALL document. Closes ticket 26588.
9753 - Warn users that they should not include MyFamily line(s) in their
9754 torrc when running Tor bridge. Closes ticket 26908.
9757 - Tor no longer supports building with the dmalloc library. For
9758 debugging memory issues, we suggest using gperftools or msan
9759 instead. Closes ticket 26426.
9760 - Tor no longer attempts to run on Windows environments without the
9761 GetAdaptersAddresses() function. This function has existed since
9762 Windows XP, which is itself already older than we support.
9763 - Remove Tor2web functionality for version 2 onion services. The
9764 Tor2webMode and Tor2webRendezvousPoints options are now obsolete.
9765 (This feature was never shipped in vanilla Tor and it was only
9766 possible to use this feature by building the support at compile
9767 time. Tor2webMode is not implemented for version 3 onion services.)
9768 Closes ticket 26367.
9771 Changes in version 0.2.9.17 - 2018-09-10
9772 Tor 0.2.9.17 backports numerous bugfixes from later versions of Tor.
9774 o Minor features (compatibility, backport from 0.3.4.8):
9775 - Tell OpenSSL to maintain backward compatibility with previous
9776 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
9777 ciphers are disabled by default. Closes ticket 27344.
9779 o Minor features (continuous integration, backport from 0.3.4.7-rc):
9780 - Enable macOS builds in our Travis CI configuration. Closes
9782 - Install libcap-dev and libseccomp2-dev so these optional
9783 dependencies get tested on Travis CI. Closes ticket 26560.
9784 - Run asciidoc during Travis CI. Implements ticket 27087.
9785 - Use ccache in our Travis CI configuration. Closes ticket 26952.
9787 o Minor features (geoip):
9788 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
9789 Country database. Closes ticket 27089.
9791 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
9792 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
9793 tell the compiler not to include the system malloc implementation.
9794 Fixes bug 20424; bugfix on 0.2.0.20-rc.
9796 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
9797 - Silence a spurious compiler warning on the GetAdaptersAddresses
9798 function pointer cast. This issue is already fixed by 26481 in
9799 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
9800 bugfix on 0.2.3.11-alpha.
9801 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
9802 supported, and always fails. Some compilers warn about the
9803 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
9806 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
9807 - Don't link or search for pthreads when building for Windows, even
9808 if we are using build environment (like mingw) that provides a
9809 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
9811 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
9812 - Skip a pair of unreliable key generation tests on Windows, until
9813 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
9814 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
9816 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
9817 - Pass the module flags to distcheck configure, and log the flags
9818 before running configure. (Backported to 0.2.9 and later as a
9819 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
9821 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
9822 - When a Travis build fails, and showing a log fails, keep trying to
9823 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
9824 - When we use echo in Travis, don't pass a --flag as the first
9825 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
9827 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
9828 - When voting for recommended versions, make sure that all of the
9829 versions are well-formed and parsable. Fixes bug 26485; bugfix
9832 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
9833 - Fix a bug in out sandboxing rules for the openat() syscall.
9834 Previously, no openat() call would be permitted, which would break
9835 filesystem operations on recent glibc versions. Fixes bug 25440;
9836 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
9838 o Minor bugfixes (onion services, backport from 0.3.4.8):
9839 - Silence a spurious compiler warning in
9840 rend_client_send_introduction(). Fixes bug 27463; bugfix
9843 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
9844 - Log a protocol warning when single onion services or Tor2web clients
9845 fail to authenticate direct connections to relays.
9846 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
9848 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
9849 - Disable core dumps in test_bt.sh, to avoid failures in "make
9850 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
9852 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
9853 - Before running make test-network-all, delete old logs and test
9854 result files, to avoid spurious failures. Fixes bug 27295; bugfix
9857 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
9858 - Our "tortls/cert_matches_key" unit test no longer relies on
9859 OpenSSL internals. Previously, it relied on unsupported OpenSSL
9860 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
9861 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
9863 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
9864 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
9865 27185; bugfix on 0.2.2.2-alpha.
9868 Changes in version 0.3.2.12 - 2018-09-10
9869 Tor 0.3.2.12 backport numerous fixes from later versions of Tor.
9871 o Minor features (compatibility, backport from 0.3.4.8):
9872 - Tell OpenSSL to maintain backward compatibility with previous
9873 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
9874 ciphers are disabled by default. Closes ticket 27344.
9876 o Minor features (continuous integration, backport from 0.3.4.7-rc):
9877 - Enable macOS builds in our Travis CI configuration. Closes
9879 - Install libcap-dev and libseccomp2-dev so these optional
9880 dependencies get tested on Travis CI. Closes ticket 26560.
9881 - Run asciidoc during Travis CI. Implements ticket 27087.
9882 - Use ccache in our Travis CI configuration. Closes ticket 26952.
9884 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
9885 - Use cargo cache in our Travis CI configuration. Closes
9888 o Minor features (controller, backport from 0.3.4.6-rc):
9889 - The control port now exposes the list of HTTPTunnelPorts and
9890 ExtOrPorts via GETINFO net/listeners/httptunnel and
9891 net/listeners/extor respectively. Closes ticket 26647.
9893 o Minor features (directory authorities, backport from 0.3.4.7-rc):
9894 - Authorities no longer vote to make the subprotocol version
9895 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
9896 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
9898 o Minor features (geoip):
9899 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
9900 Country database. Closes ticket 27089.
9902 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
9903 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
9904 tell the compiler not to include the system malloc implementation.
9905 Fixes bug 20424; bugfix on 0.2.0.20-rc.
9906 - Don't try to use a pragma to temporarily disable the
9907 -Wunused-const-variable warning if the compiler doesn't support
9908 it. Fixes bug 26785; bugfix on 0.3.2.11.
9910 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
9911 - Silence a spurious compiler warning on the GetAdaptersAddresses
9912 function pointer cast. This issue is already fixed by 26481 in
9913 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
9914 bugfix on 0.2.3.11-alpha.
9915 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
9916 supported, and always fails. Some compilers warn about the
9917 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
9920 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
9921 - Don't link or search for pthreads when building for Windows, even
9922 if we are using build environment (like mingw) that provides a
9923 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
9925 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
9926 - Skip a pair of unreliable key generation tests on Windows, until
9927 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
9928 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
9930 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
9931 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
9932 - Pass the module flags to distcheck configure, and log the flags
9933 before running configure. (Backported to 0.2.9 and later as a
9934 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
9936 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
9937 - When a Travis build fails, and showing a log fails, keep trying to
9938 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
9939 - When we use echo in Travis, don't pass a --flag as the first
9940 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
9942 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
9943 - When voting for recommended versions, make sure that all of the
9944 versions are well-formed and parsable. Fixes bug 26485; bugfix
9947 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
9948 - Fix a bug in out sandboxing rules for the openat() syscall.
9949 Previously, no openat() call would be permitted, which would break
9950 filesystem operations on recent glibc versions. Fixes bug 25440;
9951 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
9953 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
9954 - Improve the log message when connection initiators fail to
9955 authenticate direct connections to relays. Fixes bug 26927; bugfix
9958 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
9959 - Fix bug that causes services to not ever rotate their descriptors
9960 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
9963 o Minor bugfixes (onion services, backport from 0.3.4.8):
9964 - Silence a spurious compiler warning in
9965 rend_client_send_introduction(). Fixes bug 27463; bugfix
9968 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
9969 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
9971 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
9972 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
9973 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
9974 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
9976 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
9977 - Log a protocol warning when single onion services or Tor2web clients
9978 fail to authenticate direct connections to relays.
9979 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
9981 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
9982 - Disable core dumps in test_bt.sh, to avoid failures in "make
9983 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
9985 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
9986 - When running make test-network-all, use the mixed+hs-v2 network.
9987 (A previous fix to chutney removed v3 onion services from the
9988 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
9989 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
9990 - Before running make test-network-all, delete old logs and test
9991 result files, to avoid spurious failures. Fixes bug 27295; bugfix
9994 o Minor bugfixes (testing, openssl compatibility):
9995 - Our "tortls/cert_matches_key" unit test no longer relies on OpenSSL
9996 internals. Previously, it relied on unsupported OpenSSL behavior in
9997 a way that caused it to crash with OpenSSL 1.0.2p. Fixes bug 27226;
9998 bugfix on 0.2.5.1-alpha.
10000 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
10001 - Our "tortls/cert_matches_key" unit test no longer relies on
10002 OpenSSL internals. Previously, it relied on unsupported OpenSSL
10003 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
10004 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
10006 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
10007 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
10008 27185; bugfix on 0.2.2.2-alpha.
10011 Changes in version 0.3.3.10 - 2018-09-10
10012 Tor 0.3.3.10 backports numerous fixes from later versions of Tor.
10014 o Minor features (bug workaround, backport from 0.3.4.7-rc):
10015 - Compile correctly on systems that provide the C11 stdatomic.h
10016 header, but where C11 atomic functions don't actually compile.
10017 Closes ticket 26779; workaround for Debian issue 903709.
10019 o Minor features (compatibility, backport from 0.3.4.8):
10020 - Tell OpenSSL to maintain backward compatibility with previous
10021 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
10022 ciphers are disabled by default. Closes ticket 27344.
10024 o Minor features (continuous integration, backport from 0.3.4.7-rc):
10025 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
10026 - Enable macOS builds in our Travis CI configuration. Closes
10028 - Install libcap-dev and libseccomp2-dev so these optional
10029 dependencies get tested on Travis CI. Closes ticket 26560.
10030 - Run asciidoc during Travis CI. Implements ticket 27087.
10031 - Use ccache in our Travis CI configuration. Closes ticket 26952.
10033 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
10034 - Use cargo cache in our Travis CI configuration. Closes
10037 o Minor features (controller, backport from 0.3.4.6-rc):
10038 - The control port now exposes the list of HTTPTunnelPorts and
10039 ExtOrPorts via GETINFO net/listeners/httptunnel and
10040 net/listeners/extor respectively. Closes ticket 26647.
10042 o Minor features (directory authorities, backport from 0.3.4.7-rc):
10043 - Authorities no longer vote to make the subprotocol version
10044 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
10045 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
10047 o Minor features (geoip):
10048 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
10049 Country database. Closes ticket 27089.
10051 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
10052 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
10053 tell the compiler not to include the system malloc implementation.
10054 Fixes bug 20424; bugfix on 0.2.0.20-rc.
10055 - Don't try to use a pragma to temporarily disable the
10056 -Wunused-const-variable warning if the compiler doesn't support
10057 it. Fixes bug 26785; bugfix on 0.3.2.11.
10059 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
10060 - Silence a spurious compiler warning on the GetAdaptersAddresses
10061 function pointer cast. This issue is already fixed by 26481 in
10062 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
10063 bugfix on 0.2.3.11-alpha.
10064 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
10065 supported, and always fails. Some compilers warn about the
10066 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
10069 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
10070 - Don't link or search for pthreads when building for Windows, even
10071 if we are using build environment (like mingw) that provides a
10072 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
10074 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
10075 - Skip a pair of unreliable key generation tests on Windows, until
10076 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
10077 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
10079 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
10080 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
10081 - Pass the module flags to distcheck configure, and log the flags
10082 before running configure. (Backported to 0.2.9 and later as a
10083 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
10085 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
10086 - When a Travis build fails, and showing a log fails, keep trying to
10087 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
10088 - When we use echo in Travis, don't pass a --flag as the first
10089 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
10091 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
10092 - When voting for recommended versions, make sure that all of the
10093 versions are well-formed and parsable. Fixes bug 26485; bugfix
10096 o Minor bugfixes (in-process restart, backport from 0.3.4.7-rc):
10097 - Always call tor_free_all() when leaving tor_run_main(). When we
10098 did not, restarting tor in-process would cause an assertion
10099 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
10101 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
10102 - Fix a bug in our sandboxing rules for the openat() syscall.
10103 Previously, no openat() call would be permitted, which would break
10104 filesystem operations on recent glibc versions. Fixes bug 25440;
10105 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
10107 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
10108 - Improve the log message when connection initiators fail to
10109 authenticate direct connections to relays. Fixes bug 26927; bugfix
10112 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
10113 - Fix bug that causes services to not ever rotate their descriptors
10114 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
10117 o Minor bugfixes (onion services, backport from 0.3.4.8):
10118 - Silence a spurious compiler warning in
10119 rend_client_send_introduction(). Fixes bug 27463; bugfix
10122 o Minor bugfixes (portability, backport from 0.3.4.6-rc):
10123 - Work around two different bugs in the OS X 10.10 and later SDKs
10124 that would prevent us from successfully targeting earlier versions
10125 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
10127 o Minor bugfixes (portability, backport from 0.3.4.7-rc):
10128 - Fix compilation of the unit tests on GNU/Hurd, which does not
10129 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
10132 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
10133 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
10135 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
10136 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
10137 - Protover parsing was accepting the presence of whitespace in
10138 version strings, which the C implementation would choke on, e.g.
10139 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
10140 - Protover parsing was ignoring a 2nd hyphen and everything after
10141 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
10143 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
10144 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
10145 - cd to ${abs_top_builddir}/src/rust before running cargo in
10146 src/test/test_rust.sh. This makes the working directory consistent
10147 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
10149 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
10150 - Log a protocol warning when single onion services or Tor2web clients
10151 fail to authenticate direct connections to relays.
10152 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
10154 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
10155 - Disable core dumps in test_bt.sh, to avoid failures in "make
10156 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
10158 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
10159 - When running make test-network-all, use the mixed+hs-v2 network.
10160 (A previous fix to chutney removed v3 onion services from the
10161 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
10162 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
10163 - Before running make test-network-all, delete old logs and test
10164 result files, to avoid spurious failures. Fixes bug 27295; bugfix
10167 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
10168 - Our "tortls/cert_matches_key" unit test no longer relies on
10169 OpenSSL internals. Previously, it relied on unsupported OpenSSL
10170 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
10171 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
10173 o Minor bugfixes (v3 onion services, backport from 0.3.4.6-rc):
10174 - Stop sending ed25519 link specifiers in v3 onion service introduce
10175 cells and descriptors, when the rendezvous or introduction point
10176 doesn't support ed25519 link authentication. Fixes bug 26627;
10177 bugfix on 0.3.2.4-alpha.
10179 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
10180 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
10181 27185; bugfix on 0.2.2.2-alpha.
10184 Changes in version 0.3.4.8 - 2018-09-10
10185 Tor 0.3.4.8 is the first stable release in its series; it includes
10186 compilation and portability fixes.
10188 The Tor 0.3.4 series includes improvements for running Tor in
10189 low-power and embedded environments, which should help performance in
10190 general. We've begun work on better modularity, and included preliminary
10191 changes on the directory authority side to accommodate a new bandwidth
10192 measurement system. We've also integrated more continuous-integration
10193 systems into our development process, and made corresponding changes to
10194 Tor's testing infrastructure. Finally, we've continued to refine
10195 our anti-denial-of-service code.
10197 Below are the changes since 0.3.4.7-rc. For a complete list of changes
10198 since 0.3.3.9, see the ReleaseNotes file.
10200 o Minor features (compatibility):
10201 - Tell OpenSSL to maintain backward compatibility with previous
10202 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
10203 ciphers are disabled by default. Closes ticket 27344.
10205 o Minor features (continuous integration):
10206 - Log the compiler path and version during Appveyor builds.
10207 Implements ticket 27449.
10208 - Show config.log and test-suite.log after failed Appveyor builds.
10209 Also upload the zipped full logs as a build artifact. Implements
10212 o Minor bugfixes (compilation):
10213 - Silence a spurious compiler warning on the GetAdaptersAddresses
10214 function pointer cast. This issue is already fixed by 26481 in
10215 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
10216 bugfix on 0.2.3.11-alpha.
10217 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
10218 supported, and always fails. Some compilers warn about the
10219 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
10222 o Minor bugfixes (continuous integration):
10223 - Disable gcc hardening in Appveyor Windows 64-bit builds. As of
10224 August 29 2018, Appveyor images come with gcc 8.2.0 by default.
10225 Executables compiled for 64-bit Windows with this version of gcc
10226 crash when Tor's --enable-gcc-hardening flag is set. Fixes bug
10227 27460; bugfix on 0.3.4.1-alpha.
10228 - When a Travis build fails, and showing a log fails, keep trying to
10229 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
10230 - When we use echo in Travis, don't pass a --flag as the first
10231 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
10233 o Minor bugfixes (onion services):
10234 - Silence a spurious compiler warning in
10235 rend_client_send_introduction(). Fixes bug 27463; bugfix
10238 o Minor bugfixes (testing, chutney):
10239 - When running make test-network-all, use the mixed+hs-v2 network.
10240 (A previous fix to chutney removed v3 onion services from the
10241 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
10242 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
10243 - Before running make test-network-all, delete old logs and test
10244 result files, to avoid spurious failures. Fixes bug 27295; bugfix
10247 Changes in version 0.3.4.7-rc - 2018-08-24
10248 Tor 0.3.4.7-rc fixes several small compilation, portability, and
10249 correctness issues in previous versions of Tor. This version is a
10250 release candidate: if no serious bugs are found, we expect that the
10251 stable 0.3.4 release will be (almost) the same as this release.
10253 o Minor features (bug workaround):
10254 - Compile correctly on systems that provide the C11 stdatomic.h
10255 header, but where C11 atomic functions don't actually compile.
10256 Closes ticket 26779; workaround for Debian issue 903709.
10258 o Minor features (continuous integration):
10259 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
10260 - Enable macOS builds in our Travis CI configuration. Closes
10262 - Install libcap-dev and libseccomp2-dev so these optional
10263 dependencies get tested on Travis CI. Closes ticket 26560.
10264 - Only post Appveyor IRC notifications when the build fails.
10265 Implements ticket 27275.
10266 - Run asciidoc during Travis CI. Implements ticket 27087.
10267 - Use ccache in our Travis CI configuration. Closes ticket 26952.
10269 o Minor features (continuous integration, rust):
10270 - Use cargo cache in our Travis CI configuration. Closes
10273 o Minor features (directory authorities):
10274 - Authorities no longer vote to make the subprotocol version
10275 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
10276 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
10278 o Minor features (geoip):
10279 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
10280 Country database. Closes ticket 27089.
10282 o Minor bugfixes (compilation, windows):
10283 - Don't link or search for pthreads when building for Windows, even
10284 if we are using build environment (like mingw) that provides a
10285 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
10287 o Minor bugfixes (continuous integration):
10288 - Improve Appveyor CI IRC logging. Generate correct branches and
10289 URLs for pull requests and tags. Use unambiguous short commits.
10290 Fixes bug 26979; bugfix on master.
10291 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
10292 - Pass the module flags to distcheck configure, and log the flags
10293 before running configure. (Backported to 0.2.9 and later as a
10294 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
10296 o Minor bugfixes (in-process restart):
10297 - Always call tor_free_all() when leaving tor_run_main(). When we
10298 did not, restarting tor in-process would cause an assertion
10299 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
10301 o Minor bugfixes (linux seccomp2 sandbox):
10302 - Fix a bug in out sandboxing rules for the openat() syscall.
10303 Previously, no openat() call would be permitted, which would break
10304 filesystem operations on recent glibc versions. Fixes bug 25440;
10305 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
10307 o Minor bugfixes (onion services):
10308 - Fix bug that causes services to not ever rotate their descriptors
10309 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
10312 o Minor bugfixes (portability):
10313 - Fix compilation of the unit tests on GNU/Hurd, which does not
10314 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
10317 o Minor bugfixes (rust):
10318 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
10320 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
10321 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
10322 - Protover parsing was accepting the presence of whitespace in
10323 version strings, which the C implementation would choke on, e.g.
10324 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
10325 - Protover parsing was ignoring a 2nd hyphen and everything after
10326 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
10328 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
10329 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
10330 - cd to ${abs_top_builddir}/src/rust before running cargo in
10331 src/test/test_rust.sh. This makes the working directory consistent
10332 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
10334 o Minor bugfixes (testing, bootstrap):
10335 - When calculating bootstrap progress, check exit policies and the
10336 exit flag. Previously, Tor would only check the exit flag, which
10337 caused race conditions in small and fast networks like chutney.
10338 Fixes bug 27236; bugfix on 0.2.6.3-alpha.
10340 o Minor bugfixes (testing, openssl compatibility):
10341 - Our "tortls/cert_matches_key" unit test no longer relies on
10342 OpenSSL internals. Previously, it relied on unsupported OpenSSL
10343 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
10344 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
10346 o Minor bugfixes (Windows, compilation):
10347 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
10348 27185; bugfix on 0.2.2.2-alpha.
10351 Changes in version 0.3.4.6-rc - 2018-08-06
10352 Tor 0.3.4.6-rc fixes several small compilation, portability, and
10353 correctness issues in previous versions of Tor. This version is a
10354 release candidate: if no serious bugs are found, we expect that the
10355 stable 0.3.4 release will be (almost) the same as this release.
10357 o Major bugfixes (event scheduler):
10358 - When we enable a periodic event, schedule it in the event loop
10359 rather than running it immediately. Previously, we would re-run
10360 periodic events immediately in the middle of (for example)
10361 changing our options, with unpredictable effects. Fixes bug 27003;
10362 bugfix on 0.3.4.1-alpha.
10364 o Minor features (compilation):
10365 - When building Tor, prefer to use Python 3 over Python 2, and more
10366 recent (contemplated) versions over older ones. Closes
10368 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
10369 tell the compiler not to include the system malloc implementation.
10370 Fixes bug 20424; bugfix on 0.2.0.20-rc.
10371 - Don't try to use a pragma to temporarily disable the
10372 -Wunused-const-variable warning if the compiler doesn't support
10373 it. Fixes bug 26785; bugfix on 0.3.2.11.
10375 o Minor bugfixes (continuous integration):
10376 - Skip a pair of unreliable key generation tests on Windows, until
10377 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
10378 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
10380 o Minor features (controller):
10381 - The control port now exposes the list of HTTPTunnelPorts and
10382 ExtOrPorts via GETINFO net/listeners/httptunnel and
10383 net/listeners/extor respectively. Closes ticket 26647.
10385 o Minor bugfixes (directory authority):
10386 - When voting for recommended versions, make sure that all of the
10387 versions are well-formed and parsable. Fixes bug 26485; bugfix
10390 o Minor features (geoip):
10391 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10392 Country database. Closes ticket 26674.
10394 o Minor features (Rust, portability):
10395 - Rust cross-compilation is now supported. Closes ticket 25895.
10397 o Minor bugfixes (compilation):
10398 - Update build system so that tor builds again with --disable-unittests
10399 after recent refactoring. Fixes bug 26789; bugfix on 0.3.4.3-alpha.
10400 - Fix a compilation warning on some versions of GCC when building
10401 code that calls routerinfo_get_my_routerinfo() twice, assuming
10402 that the second call will succeed if the first one did. Fixes bug
10403 26269; bugfix on 0.2.8.2-alpha.
10405 o Minor bugfixes (controller):
10406 - Report the port correctly when a port is configured to bind to
10407 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
10408 - Parse the "HSADDRESS=" parameter in HSPOST commands properly.
10409 Previously, it was misparsed and ignored. Fixes bug 26523; bugfix
10410 on 0.3.3.1-alpha. Patch by "akwizgran".
10412 o Minor bugfixes (correctness, flow control):
10413 - Upon receiving a stream-level SENDME cell, verify that our window
10414 has not grown too large. Fixes bug 26214; bugfix on svn
10417 o Minor bugfixes (memory, correctness):
10418 - Fix a number of small memory leaks identified by coverity. Fixes
10419 bug 26467; bugfix on numerous Tor versions.
10421 o Minor bugfixes (logging):
10422 - Improve the log message when connection initiators fail to
10423 authenticate direct connections to relays. Fixes bug 26927; bugfix
10426 o Minor bugfixes (portability):
10427 - Avoid a compilation error in test_bwmgt.c on Solaris 10. Fixes bug
10428 26994; bugfix on 0.3.4.1-alpha.
10429 - Work around two different bugs in the OS X 10.10 and later SDKs
10430 that would prevent us from successfully targeting earlier versions
10431 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
10433 o Minor bugfixes (single onion services, Tor2web):
10434 - Log a protocol warning when single onion services or Tor2web
10435 clients fail to authenticate direct connections to relays. Fixes
10436 bug 26924; bugfix on 0.2.9.1-alpha.
10438 o Minor bugfixes (testing):
10439 - Disable core dumps in test_bt.sh, to avoid failures in "make
10440 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
10442 o Minor bugfixes (testing, compatibility):
10443 - When running the ntor_ref.py and hs_ntor_ref.py tests, make sure
10444 only to pass strings (rather than "bytes" objects) to the Python
10445 subprocess module. Python 3 on Windows seems to require this.
10446 Fixes bug 26535; bugfix on 0.2.5.5-alpha (for ntor_ref.py) and
10447 0.3.1.1-alpha (for hs_ntor_ref.py).
10449 o Minor bugfixes (v3 onion services):
10450 - Stop sending ed25519 link specifiers in v3 onion service introduce
10451 cells and descriptors, when the rendezvous or introduction point
10452 doesn't support ed25519 link authentication. Fixes bug 26627;
10453 bugfix on 0.3.2.4-alpha.
10456 Changes in version 0.3.4.5-rc - 2018-07-13
10457 Tor 0.3.4.5-rc moves to a new bridge authority, meaning people running
10458 bridge relays should upgrade.
10460 o Directory authority changes:
10461 - The "Bifroest" bridge authority has been retired; the new bridge
10462 authority is "Serge", and it is operated by George from the
10463 TorBSD project. Closes ticket 26771.
10466 Changes in version 0.3.3.9 - 2018-07-13
10467 Tor 0.3.3.9 moves to a new bridge authority, meaning people running
10468 bridge relays should upgrade.
10470 o Directory authority changes:
10471 - The "Bifroest" bridge authority has been retired; the new bridge
10472 authority is "Serge", and it is operated by George from the
10473 TorBSD project. Closes ticket 26771.
10476 Changes in version 0.3.2.11 - 2018-07-13
10477 Tor 0.3.2.11 moves to a new bridge authority, meaning people running
10478 bridge relays should upgrade. We also take this opportunity to backport
10481 o Directory authority changes:
10482 - The "Bifroest" bridge authority has been retired; the new bridge
10483 authority is "Serge", and it is operated by George from the
10484 TorBSD project. Closes ticket 26771.
10486 o Directory authority changes (backport from 0.3.3.7):
10487 - Add an IPv6 address for the "dannenberg" directory authority.
10488 Closes ticket 26343.
10490 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
10491 - When directory authorities read a zero-byte bandwidth file, they
10492 would previously log a warning with the contents of an
10493 uninitialised buffer. They now log a warning about the empty file
10494 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10496 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
10497 - Correctly detect when onion services get disabled after HUP. Fixes
10498 bug 25761; bugfix on 0.3.2.1.
10500 o Minor features (sandbox, backport from 0.3.3.4-alpha):
10501 - Explicitly permit the poll() system call when the Linux
10502 seccomp2-based sandbox is enabled: apparently, some versions of
10503 libc use poll() when calling getpwnam(). Closes ticket 25313.
10505 o Minor feature (continuous integration, backport from 0.3.3.5-rc):
10506 - Update the Travis CI configuration to use the stable Rust channel,
10507 now that we have decided to require that. Closes ticket 25714.
10509 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
10510 - Our .travis.yml configuration now includes support for testing the
10511 results of "make distcheck". (It's not uncommon for "make check"
10512 to pass but "make distcheck" to fail.) Closes ticket 25814.
10513 - Our Travis CI configuration now integrates with the Coveralls
10514 coverage analysis tool. Closes ticket 25818.
10516 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
10517 - Add several checks to detect whether Tor relays are uploading
10518 their descriptors without specifying why they regenerated them.
10519 Diagnostic for ticket 25686.
10521 o Minor features (compilation, backport from 0.3.4.4-rc):
10522 - When building Tor, prefer to use Python 3 over Python 2, and more
10523 recent (contemplated) versions over older ones. Closes
10526 o Minor features (geoip):
10527 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10528 Country database. Closes ticket 26674.
10530 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
10531 - Upon receiving a malformed connected cell, stop processing the
10532 cell immediately. Previously we would mark the connection for
10533 close, but continue processing the cell as if the connection were
10534 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
10536 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
10537 - Allow the nanosleep() system call, which glibc uses to implement
10538 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
10540 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
10541 - When running the hs_ntor_ref.py test, make sure only to pass
10542 strings (rather than "bytes" objects) to the Python subprocess
10543 module. Python 3 on Windows seems to require this. Fixes bug
10544 26535; bugfix on 0.3.1.1-alpha.
10545 - When running the ntor_ref.py test, make sure only to pass strings
10546 (rather than "bytes" objects) to the Python subprocess module.
10547 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10550 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
10551 - Work around a change in OpenSSL 1.1.1 where return values that
10552 would previously indicate "no password" now indicate an empty
10553 password. Without this workaround, Tor instances running with
10554 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10555 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10557 o Minor bugfixes (documentation, backport from 0.3.3.5-rc):
10558 - Document that the PerConnBW{Rate,Burst} options will fall back to
10559 their corresponding consensus parameters only if those parameters
10560 are set. Previously we had claimed that these values would always
10561 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
10563 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
10564 - Fix a compilation warning on some versions of GCC when building
10565 code that calls routerinfo_get_my_routerinfo() twice, assuming
10566 that the second call will succeed if the first one did. Fixes bug
10567 26269; bugfix on 0.2.8.2-alpha.
10569 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
10570 - Don't consider Tor running as a client if the ControlPort is open,
10571 but no actual client ports are open. Fixes bug 26062; bugfix
10574 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
10575 - Prevent a possible out-of-bounds smartlist read in
10576 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10578 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
10579 - Fix a very unlikely (impossible, we believe) null pointer
10580 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
10581 Coverity; this is CID 1430932.
10583 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
10584 - Fix a memory leak when a v3 onion service is configured and gets a
10585 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
10586 - When parsing the descriptor signature, look for the token plus an
10587 extra white-space at the end. This is more correct but also will
10588 allow us to support new fields that might start with "signature".
10589 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
10591 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
10592 - Relays now correctly block attempts to re-extend to the previous
10593 relay by Ed25519 identity. Previously they would warn in this
10594 case, but not actually reject the attempt. Fixes bug 26158; bugfix
10597 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
10598 - Avoid a crash when running with DirPort set but ORPort turned off.
10599 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
10601 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
10602 - Silence unused-const-variable warnings in zstd.h with some GCC
10603 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
10605 o Minor bugfixes (testing, backport from 0.3.3.4-alpha):
10606 - Avoid intermittent test failures due to a test that had relied on
10607 onion service introduction point creation finishing within 5
10608 seconds of real clock time. Fixes bug 25450; bugfix
10611 o Minor bugfixes (compilation, backport from 0.3.3.4-alpha):
10612 - Fix a C99 compliance issue in our configuration script that caused
10613 compilation issues when compiling Tor with certain versions of
10614 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
10616 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
10617 - Fix a number of small memory leaks identified by coverity. Fixes
10618 bug 26467; bugfix on numerous Tor versions.
10620 o Code simplification and refactoring (backport from 0.3.3.5-rc):
10621 - Move the list of default directory authorities to its own file.
10622 Closes ticket 24854. Patch by "beastr0".
10625 Changes in version 0.2.9.16 - 2018-07-13
10626 Tor 0.2.9.16 moves to a new bridge authority, meaning people running
10627 bridge relays should upgrade. We also take this opportunity to backport
10630 o Directory authority changes:
10631 - The "Bifroest" bridge authority has been retired; the new bridge
10632 authority is "Serge", and it is operated by George from the
10633 TorBSD project. Closes ticket 26771.
10635 o Directory authority changes (backport from 0.3.3.7):
10636 - Add an IPv6 address for the "dannenberg" directory authority.
10637 Closes ticket 26343.
10639 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
10640 - When directory authorities read a zero-byte bandwidth file, they
10641 would previously log a warning with the contents of an
10642 uninitialised buffer. They now log a warning about the empty file
10643 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10645 o Minor features (sandbox, backport from 0.3.3.4-alpha):
10646 - Explicitly permit the poll() system call when the Linux
10647 seccomp2-based sandbox is enabled: apparently, some versions of
10648 libc use poll() when calling getpwnam(). Closes ticket 25313.
10650 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
10651 - Our .travis.yml configuration now includes support for testing the
10652 results of "make distcheck". (It's not uncommon for "make check"
10653 to pass but "make distcheck" to fail.) Closes ticket 25814.
10654 - Our Travis CI configuration now integrates with the Coveralls
10655 coverage analysis tool. Closes ticket 25818.
10657 o Minor features (compilation, backport from 0.3.4.4-rc):
10658 - When building Tor, prefer to use Python 3 over Python 2, and more
10659 recent (contemplated) versions over older ones. Closes
10662 o Minor features (geoip):
10663 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10664 Country database. Closes ticket 26674.
10666 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
10667 - Upon receiving a malformed connected cell, stop processing the
10668 cell immediately. Previously we would mark the connection for
10669 close, but continue processing the cell as if the connection were
10670 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
10672 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
10673 - Allow the nanosleep() system call, which glibc uses to implement
10674 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
10676 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
10677 - When running the ntor_ref.py test, make sure only to pass strings
10678 (rather than "bytes" objects) to the Python subprocess module.
10679 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10682 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
10683 - Work around a change in OpenSSL 1.1.1 where return values that
10684 would previously indicate "no password" now indicate an empty
10685 password. Without this workaround, Tor instances running with
10686 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10687 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10689 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
10690 - Fix a compilation warning on some versions of GCC when building
10691 code that calls routerinfo_get_my_routerinfo() twice, assuming
10692 that the second call will succeed if the first one did. Fixes bug
10693 26269; bugfix on 0.2.8.2-alpha.
10695 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
10696 - Don't consider Tor running as a client if the ControlPort is open,
10697 but no actual client ports are open. Fixes bug 26062; bugfix
10700 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
10701 - Prevent a possible out-of-bounds smartlist read in
10702 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10704 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
10705 - Fix a very unlikely (impossible, we believe) null pointer
10706 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
10707 Coverity; this is CID 1430932.
10709 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
10710 - Fix a number of small memory leaks identified by coverity. Fixes
10711 bug 26467; bugfix on numerous Tor versions.
10713 o Code simplification and refactoring (backport from 0.3.3.5-rc):
10714 - Move the list of default directory authorities to its own file.
10715 Closes ticket 24854. Patch by "beastr0".
10718 Changes in version 0.3.4.4-rc - 2018-07-09
10719 Tor 0.3.4.4-rc fixes several small compilation, portability, and
10720 correctness issues in previous versions of Tor. This version is a
10721 release candidate: if no serious bugs are found, we expect that the
10722 stable 0.3.4 release will be (almost) the same as this release.
10724 o Minor features (compilation):
10725 - When building Tor, prefer to use Python 3 over Python 2, and more
10726 recent (contemplated) versions over older ones. Closes
10729 o Minor features (geoip):
10730 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10731 Country database. Closes ticket 26674.
10733 o Minor features (Rust, portability):
10734 - Rust cross-compilation is now supported. Closes ticket 25895.
10736 o Minor bugfixes (compilation):
10737 - Fix a compilation warning on some versions of GCC when building
10738 code that calls routerinfo_get_my_routerinfo() twice, assuming
10739 that the second call will succeed if the first one did. Fixes bug
10740 26269; bugfix on 0.2.8.2-alpha.
10742 o Minor bugfixes (control port):
10743 - Report the port correctly when a port is configured to bind to
10744 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
10745 - Handle the HSADDRESS= argument to the HSPOST command properly.
10746 (Previously, this argument was misparsed and thus ignored.) Fixes
10747 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
10749 o Minor bugfixes (correctness, flow control):
10750 - Upon receiving a stream-level SENDME cell, verify that our window
10751 has not grown too large. Fixes bug 26214; bugfix on svn
10754 o Minor bugfixes (memory, correctness):
10755 - Fix a number of small memory leaks identified by coverity. Fixes
10756 bug 26467; bugfix on numerous Tor versions.
10758 o Minor bugfixes (testing, compatibility):
10759 - When running the hs_ntor_ref.py test, make sure only to pass
10760 strings (rather than "bytes" objects) to the Python subprocess
10761 module. Python 3 on Windows seems to require this. Fixes bug
10762 26535; bugfix on 0.3.1.1-alpha.
10763 - When running the ntor_ref.py test, make sure only to pass strings
10764 (rather than "bytes" objects) to the Python subprocess module.
10765 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10769 Changes in version 0.3.3.8 - 2018-07-09
10770 Tor 0.3.3.8 backports several changes from the 0.3.4.x series, including
10771 fixes for a memory leak affecting directory authorities.
10773 o Major bugfixes (directory authority, backport from 0.3.4.3-alpha):
10774 - Stop leaking memory on directory authorities when planning to
10775 vote. This bug was crashing authorities by exhausting their
10776 memory. Fixes bug 26435; bugfix on 0.3.3.6.
10778 o Major bugfixes (rust, testing, backport from 0.3.4.3-alpha):
10779 - Make sure that failing tests in Rust will actually cause the build
10780 to fail: previously, they were ignored. Fixes bug 26258; bugfix
10783 o Minor features (compilation, backport from 0.3.4.4-rc):
10784 - When building Tor, prefer to use Python 3 over Python 2, and more
10785 recent (contemplated) versions over older ones. Closes
10788 o Minor features (geoip):
10789 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10790 Country database. Closes ticket 26674.
10792 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
10793 - Add several checks to detect whether Tor relays are uploading
10794 their descriptors without specifying why they regenerated them.
10795 Diagnostic for ticket 25686.
10797 o Minor bugfixes (circuit path selection, backport from 0.3.4.1-alpha):
10798 - Don't count path selection failures as circuit build failures.
10799 This change should eliminate cases where Tor blames its guard or
10800 the network for situations like insufficient microdescriptors
10801 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
10804 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
10805 - Fix a compilation warning on some versions of GCC when building
10806 code that calls routerinfo_get_my_routerinfo() twice, assuming
10807 that the second call will succeed if the first one did. Fixes bug
10808 26269; bugfix on 0.2.8.2-alpha.
10810 o Minor bugfixes (control port, backport from 0.3.4.4-rc):
10811 - Handle the HSADDRESS= argument to the HSPOST command properly.
10812 (Previously, this argument was misparsed and thus ignored.) Fixes
10813 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
10815 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
10816 - Fix a number of small memory leaks identified by coverity. Fixes
10817 bug 26467; bugfix on numerous Tor versions.
10819 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
10820 - Relays now correctly block attempts to re-extend to the previous
10821 relay by Ed25519 identity. Previously they would warn in this
10822 case, but not actually reject the attempt. Fixes bug 26158; bugfix
10825 o Minor bugfixes (restart-in-process, backport from 0.3.4.1-alpha):
10826 - When shutting down, Tor now clears all the flags in the control.c
10827 module. This should prevent a bug where authentication cookies are
10828 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
10830 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
10831 - When running the hs_ntor_ref.py test, make sure only to pass
10832 strings (rather than "bytes" objects) to the Python subprocess
10833 module. Python 3 on Windows seems to require this. Fixes bug
10834 26535; bugfix on 0.3.1.1-alpha.
10835 - When running the ntor_ref.py test, make sure only to pass strings
10836 (rather than "bytes" objects) to the Python subprocess module.
10837 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10841 Changes in version 0.3.4.3-alpha - 2018-06-26
10842 Tor 0.3.4.3-alpha fixes several bugs in earlier versions, including
10843 one that was causing stability issues on directory authorities.
10845 o Major bugfixes (directory authority):
10846 - Stop leaking memory on directory authorities when planning to
10847 vote. This bug was crashing authorities by exhausting their
10848 memory. Fixes bug 26435; bugfix on 0.3.3.6.
10850 o Major bugfixes (rust, testing):
10851 - Make sure that failing tests in Rust will actually cause the build
10852 to fail: previously, they were ignored. Fixes bug 26258; bugfix
10855 o Minor feature (directory authorities):
10856 - Stop warning about incomplete bw lines before the first complete
10857 bw line has been found, so that additional header lines can be
10858 ignored. Fixes bug 25960; bugfix on 0.2.2.1-alpha
10860 o Minor features (relay, diagnostic):
10861 - Add several checks to detect whether Tor relays are uploading
10862 their descriptors without specifying why they regenerated them.
10863 Diagnostic for ticket 25686.
10865 o Minor features (unit tests):
10866 - Test complete bandwidth measurements files, and test that
10867 incomplete bandwidth lines only give warnings when the end of the
10868 header has not been detected. Fixes bug 25947; bugfix
10871 o Minor bugfixes (compilation):
10872 - Refrain from compiling unit testing related object files when
10873 --disable-unittests is set to configure script. Fixes bug 24891;
10874 bugfix on 0.2.5.1-alpha.
10875 - When linking the libtor_testing.a library, only include the
10876 dirauth object files once. Previously, they were getting added
10877 twice. Fixes bug 26402; bugfix on 0.3.4.1-alpha.
10878 - The --enable-fatal-warnings flag now affects Rust code as well.
10879 Closes ticket 26245.
10881 o Minor bugfixes (onion services):
10882 - Recompute some consensus information after detecting a clock jump,
10883 or after transitioning from a non-live consensus to a live
10884 consensus. We do this to avoid having an outdated state, and
10885 miscalculating the index for next-generation onion services. Fixes
10886 bug 24977; bugfix on 0.3.2.1-alpha.
10888 o Minor bugfixes (relay):
10889 - Relays now correctly block attempts to re-extend to the previous
10890 relay by Ed25519 identity. Previously they would warn in this
10891 case, but not actually reject the attempt. Fixes bug 26158; bugfix
10894 o Minor bugfixes (testing):
10895 - Fix compilation of the doctests in the Rust crypto crate. Fixes
10896 bug 26415; bugfix on 0.3.4.1-alpha.
10897 - Instead of trying to read the geoip configuration files from
10898 within the unit tests, instead create our own ersatz files with
10899 just enough geoip data in the format we expect. Trying to read
10900 from the source directory created problems on Windows with mingw,
10901 where the build system's paths are not the same as the platform's
10902 paths. Fixes bug 25787; bugfix on 0.3.4.1-alpha.
10903 - Refrain from trying to get an item from an empty smartlist in
10904 test_bridges_clear_bridge_list. Set DEBUG_SMARTLIST in unit tests
10905 to catch improper smartlist usage. Furthermore, enable
10906 DEBUG_SMARTLIST globally when build is configured with fragile
10907 hardening. Fixes bug 26196; bugfix on 0.3.4.1-alpha.
10910 Changes in version 0.3.3.7 - 2018-06-12
10911 Tor 0.3.3.7 backports several changes from the 0.3.4.x series, including
10912 fixes for bugs affecting compatibility and stability.
10914 o Directory authority changes:
10915 - Add an IPv6 address for the "dannenberg" directory authority.
10916 Closes ticket 26343.
10918 o Minor features (geoip):
10919 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
10920 Country database. Closes ticket 26351.
10922 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
10923 - Work around a change in OpenSSL 1.1.1 where return values that
10924 would previously indicate "no password" now indicate an empty
10925 password. Without this workaround, Tor instances running with
10926 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10927 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10929 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
10930 - Silence unused-const-variable warnings in zstd.h with some GCC
10931 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
10933 o Minor bugfixes (controller, backport from 0.3.4.2-alpha):
10934 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
10935 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
10936 miscounting the total number of circuits for these field values.)
10937 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
10939 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
10940 - Prevent a possible out-of-bounds smartlist read in
10941 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10943 o Minor bugfixes (path selection, backport from 0.3.4.1-alpha):
10944 - Only select relays when they have the descriptors we prefer to use
10945 for them. This change fixes a bug where we could select a relay
10946 because it had _some_ descriptor, but reject it later with a
10947 nonfatal assertion error because it didn't have the exact one we
10948 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
10951 Changes in version 0.3.4.2-alpha - 2018-06-12
10952 Tor 0.3.4.2-alpha fixes several minor bugs in the previous alpha
10953 release, and forward-ports an authority-only security fix from 0.3.3.6.
10955 o Directory authority changes:
10956 - Add an IPv6 address for the "dannenberg" directory authority.
10957 Closes ticket 26343.
10959 o Major bugfixes (security, directory authority, denial-of-service, also in 0.3.3.6):
10960 - Fix a bug that could have allowed an attacker to force a directory
10961 authority to use up all its RAM by passing it a maliciously
10962 crafted protocol versions string. Fixes bug 25517; bugfix on
10963 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
10965 o Minor features (continuous integration):
10966 - Add the necessary configuration files for continuous integration
10967 testing on Windows, via the Appveyor platform. Closes ticket
10968 25549. Patches from Marcin Cieślak and Isis Lovecruft.
10970 o Minor features (geoip):
10971 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
10972 Country database. Closes ticket 26351.
10974 o Minor bugfixes (compatibility, openssl):
10975 - Work around a change in OpenSSL 1.1.1 where return values that
10976 would previously indicate "no password" now indicate an empty
10977 password. Without this workaround, Tor instances running with
10978 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10979 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10981 o Minor bugfixes (compilation):
10982 - Silence unused-const-variable warnings in zstd.h with some GCC
10983 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
10984 - Fix compilation when using OpenSSL 1.1.0 with the "no-deprecated"
10985 flag enabled. Fixes bug 26156; bugfix on 0.3.4.1-alpha.
10986 - Avoid a compiler warning when casting the return value of
10987 smartlist_len() to double with DEBUG_SMARTLIST enabled. Fixes bug
10988 26283; bugfix on 0.2.4.10-alpha.
10990 o Minor bugfixes (control port):
10991 - Do not count 0-length RELAY_COMMAND_DATA cells as valid data in
10992 CIRC_BW events. Previously, such cells were counted entirely in
10993 the OVERHEAD field. Now they are not. Fixes bug 26259; bugfix
10996 o Minor bugfixes (controller):
10997 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
10998 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
10999 miscounting the total number of circuits for these field values.)
11000 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
11002 o Minor bugfixes (hardening):
11003 - Prevent a possible out-of-bounds smartlist read in
11004 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
11006 o Minor bugfixes (onion services):
11007 - Fix a bug that blocked the creation of ephemeral v3 onion
11008 services. Fixes bug 25939; bugfix on 0.3.4.1-alpha.
11010 o Minor bugfixes (test coverage tools):
11011 - Update our "cov-diff" script to handle output from the latest
11012 version of gcov, and to remove extraneous timestamp information
11013 from its output. Fixes bugs 26101 and 26102; bugfix
11017 Changes in version 0.3.3.6 - 2018-05-22
11018 Tor 0.3.3.6 is the first stable release in the 0.3.3 series. It
11019 backports several important fixes from the 0.3.4.1-alpha.
11021 The Tor 0.3.3 series includes controller support and other
11022 improvements for v3 onion services, official support for embedding Tor
11023 within other applications, and our first non-trivial module written in
11024 the Rust programming language. (Rust is still not enabled by default
11025 when building Tor.) And as usual, there are numerous other smaller
11026 bugfixes, features, and improvements.
11028 Below are the changes since 0.3.3.5-rc. For a list of all changes
11029 since 0.3.2.10, see the ReleaseNotes file.
11031 o Major bugfixes (directory authorities, security, backport from 0.3.4.1-alpha):
11032 - When directory authorities read a zero-byte bandwidth file, they
11033 would previously log a warning with the contents of an
11034 uninitialised buffer. They now log a warning about the empty file
11035 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
11037 o Major bugfixes (security, directory authority, denial-of-service):
11038 - Fix a bug that could have allowed an attacker to force a directory
11039 authority to use up all its RAM by passing it a maliciously
11040 crafted protocol versions string. Fixes bug 25517; bugfix on
11041 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
11043 o Major bugfixes (crash, backport from 0.3.4.1-alpha):
11044 - Avoid a rare assertion failure in the circuit build timeout code
11045 if we fail to allow any circuits to actually complete. Fixes bug
11046 25733; bugfix on 0.2.2.2-alpha.
11048 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
11049 - Avoid a crash when testing router reachability on a router that
11050 could have an ed25519 ID, but which does not. Fixes bug 25415;
11051 bugfix on 0.3.3.2-alpha.
11053 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
11054 - Correctly detect when onion services get disabled after HUP. Fixes
11055 bug 25761; bugfix on 0.3.2.1.
11057 o Major bugfixes (relay, denial of service, backport from 0.3.4.1-alpha):
11058 - Impose a limit on circuit cell queue size. The limit can be
11059 controlled by a consensus parameter. Fixes bug 25226; bugfix
11062 o Minor features (compatibility, backport from 0.3.4.1-alpha):
11063 - Avoid some compilation warnings with recent versions of LibreSSL.
11064 Closes ticket 26006.
11066 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
11067 - Our .travis.yml configuration now includes support for testing the
11068 results of "make distcheck". (It's not uncommon for "make check"
11069 to pass but "make distcheck" to fail.) Closes ticket 25814.
11070 - Our Travis CI configuration now integrates with the Coveralls
11071 coverage analysis tool. Closes ticket 25818.
11073 o Minor features (geoip):
11074 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
11075 database. Closes ticket 26104.
11077 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
11078 - Don't consider Tor running as a client if the ControlPort is open,
11079 but no actual client ports are open. Fixes bug 26062; bugfix
11082 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
11083 - Upon receiving a malformed connected cell, stop processing the
11084 cell immediately. Previously we would mark the connection for
11085 close, but continue processing the cell as if the connection were
11086 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
11088 o Minor bugfixes (documentation, backport from 0.3.4.1-alpha):
11089 - Stop saying in the manual that clients cache ipv4 dns answers from
11090 exit relays. We haven't used them since 0.2.6.3-alpha, and in
11091 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
11092 we forgot to say so in the man page. Fixes bug 26052; bugfix
11095 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
11096 - Allow the nanosleep() system call, which glibc uses to implement
11097 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
11099 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
11100 - Fix a memory leak when a v3 onion service is configured and gets a
11101 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
11102 - When parsing the descriptor signature, look for the token plus an
11103 extra white-space at the end. This is more correct but also will
11104 allow us to support new fields that might start with "signature".
11105 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
11107 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
11108 - Avoid a crash when running with DirPort set but ORPort turned off.
11109 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
11111 o Documentation (backport from 0.3.4.1-alpha):
11112 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
11113 ticket 25857. Patch from "CTassisF".
11116 Changes in version 0.3.4.1-alpha - 2018-05-17
11117 Tor 0.3.4.1-alpha is the first release in the 0.3.4.x series. It
11118 includes refactoring to begin reducing Tor's binary size and idle CPU
11119 usage on mobile, along with prep work for new bandwidth scanners,
11120 improvements to the experimental "vanguards" feature, and numerous
11121 other small features and bugfixes.
11123 o New system requirements:
11124 - Tor no longer tries to support old operating systems without
11125 mmap() or some local equivalent. Apparently, compilation on such
11126 systems has been broken for some time, without anybody noticing or
11127 complaining. Closes ticket 25398.
11129 o Major feature (directory authority, modularization):
11130 - The directory authority subsystem has been modularized. The code
11131 is now located in src/or/dirauth/, and is compiled in by default.
11132 To disable the module, the configure option
11133 --disable-module-dirauth has been added. This module may be
11134 disabled by default in some future release. Closes ticket 25610.
11136 o Major features (main loop, CPU usage):
11137 - When Tor is disabled (via DisableNetwork or via hibernation), it
11138 no longer needs to run any per-second events. This change should
11139 make it easier for mobile applications to disable Tor while the
11140 device is sleeping, or Tor is not running. Closes ticket 26063.
11141 - Tor no longer enables all of its periodic events by default.
11142 Previously, Tor would enable all possible main loop events,
11143 regardless of whether it needed them. Furthermore, many of these
11144 events are now disabled with Tor is hibernating or DisableNetwork
11145 is set. This is a big step towards reducing client CPU usage by
11146 reducing the amount of wake-ups the daemon does. Closes ticket
11148 - The bandwidth-limitation logic has been refactored so that
11149 bandwidth calculations are performed on-demand, rather than every
11150 TokenBucketRefillInterval milliseconds. This change should improve
11151 the granularity of our bandwidth calculations, and limit the
11152 number of times that the Tor process needs to wake up when it is
11153 idle. Closes ticket 25373.
11154 - Move responsibility for many operations from a once-per-second
11155 callback to a callback that is only scheduled as needed. Moving
11156 this functionality has allowed us to disable the callback when
11157 Tor's network is disabled. Once enough items are removed from our
11158 once-per-second callback, we can eliminate it entirely to conserve
11159 CPU when idle. The functionality removed includes: closing
11160 connections, circuits, and channels (ticket 25932); consensus
11161 voting (25937); flushing log callbacks (25951); honoring delayed
11162 SIGNEWNYM requests (25949); rescanning the consensus cache
11163 (25931); saving the state file to disk (25948); warning relay
11164 operators about unreachable ports (25952); and keeping track of
11165 Tor's uptime (26009).
11167 o Major bugfixes (directory authorities, security):
11168 - When directory authorities read a zero-byte bandwidth file, they
11169 would previously log a warning with the contents of an
11170 uninitialised buffer. They now log a warning about the empty file
11171 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
11173 o Major bugfixes (crash):
11174 - Avoid a rare assertion failure in the circuit build timeout code
11175 if we fail to allow any circuits to actually complete. Fixes bug
11176 25733; bugfix on 0.2.2.2-alpha.
11178 o Major bugfixes (directory authority):
11179 - Avoid a crash when testing router reachability on a router that
11180 could have an ed25519 ID, but which does not. Fixes bug 25415;
11181 bugfix on 0.3.3.2-alpha.
11183 o Major bugfixes (onion service):
11184 - Correctly detect when onion services get disabled after HUP. Fixes
11185 bug 25761; bugfix on 0.3.2.1.
11187 o Major bugfixes (protover, voting):
11188 - Revise Rust implementation of protover to use a more memory-
11189 efficient voting algorithm and corresponding data structures, thus
11190 avoiding a potential (but small impact) DoS attack where specially
11191 crafted protocol strings would expand to several potential
11192 megabytes in memory. In the process, several portions of code were
11193 revised to be methods on new, custom types, rather than functions
11194 taking interchangeable types, thus increasing type safety of the
11195 module. Custom error types and handling were added as well, in
11196 order to facilitate better error dismissal/handling in outside
11197 crates and avoid mistakenly passing an internal error string to C
11198 over the FFI boundary. Many tests were added, and some previous
11199 differences between the C and Rust implementations have been
11200 remedied. Fixes bug 24031; bugfix on 0.3.3.1-alpha.
11202 o Major bugfixes (relay, denial of service):
11203 - Impose a limit on circuit cell queue size. The limit can be
11204 controlled by a consensus parameter. Fixes bug 25226; bugfix
11207 o Minor features (accounting):
11208 - When Tor becomes dormant, it now uses a scheduled event to wake up
11209 at the right time. Previously, we would use the per-second timer
11210 to check whether to wake up, but we no longer have any per-second
11211 timers enabled when the network is disabled. Closes ticket 26064.
11213 o Minor features (code quality):
11214 - Add optional spell-checking for the Tor codebase, using the
11215 "misspell" program. To use this feature, run "make check-typos".
11216 Closes ticket 25024.
11218 o Minor features (compatibility):
11219 - Tor now detects versions of OpenSSL 1.1.0 and later compiled with
11220 the no-deprecated option, and builds correctly with them. Closes
11221 tickets 19429, 19981, and 25353.
11222 - Avoid some compilation warnings with recent versions of LibreSSL.
11223 Closes ticket 26006.
11225 o Minor features (compression, zstd):
11226 - When running with zstd, Tor now considers using advanced functions
11227 that the zstd maintainers have labeled as potentially unstable. To
11228 prevent breakage, Tor will only use this functionality when the
11229 runtime version of the zstd library matches the version with which
11230 Tor was compiled. Closes ticket 25162.
11232 o Minor features (configuration):
11233 - The "DownloadSchedule" options have been renamed to end with
11234 "DownloadInitialDelay". The old names are still allowed, but will
11235 produce a warning. Comma-separated lists are still permitted for
11236 these options, but all values after the first are ignored (as they
11237 have been since 0.2.9). Closes ticket 23354.
11239 o Minor features (continuous integration):
11240 - Our .travis.yml configuration now includes support for testing the
11241 results of "make distcheck". (It's not uncommon for "make check"
11242 to pass but "make distcheck" to fail.) Closes ticket 25814.
11243 - Our Travis CI configuration now integrates with the Coveralls
11244 coverage analysis tool. Closes ticket 25818.
11246 o Minor features (control port):
11247 - Introduce GETINFO "current-time/{local,utc}" to return the local
11248 and UTC times respectively in ISO format. This helps a controller
11249 like Tor Browser detect a time-related error. Closes ticket 25511.
11250 Patch by Neel Chauhan.
11251 - Introduce new fields to the CIRC_BW event. There are two new
11252 fields in each of the read and written directions. The DELIVERED
11253 fields report the total valid data on the circuit, as measured by
11254 the payload sizes of verified and error-checked relay command
11255 cells. The OVERHEAD fields report the total unused bytes in each
11256 of these cells. Closes ticket 25903.
11258 o Minor features (directory authority):
11259 - Directory authorities now open their key-pinning files as O_SYNC,
11260 to limit their chances of accidentally writing partial lines.
11261 Closes ticket 23909.
11263 o Minor features (directory authority, forward compatibility):
11264 - Make the lines of the measured bandwidth file able to contain
11265 their entries in any order. Previously, the node_id entry needed
11266 to come first. Closes ticket 26004.
11268 o Minor features (entry guards):
11269 - Introduce a new torrc option NumPrimaryGuards for controlling the
11270 number of primary guards. Closes ticket 25843.
11272 o Minor features (geoip):
11273 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
11274 database. Closes ticket 26104.
11276 o Minor features (performance):
11277 - Avoid a needless call to malloc() when processing an incoming
11278 relay cell. Closes ticket 24914.
11279 - Make our timing-wheel code run a tiny bit faster on 32-bit
11280 platforms, by preferring 32-bit math to 64-bit. Closes
11282 - Avoid a needless malloc()/free() pair every time we handle an ntor
11283 handshake. Closes ticket 25150.
11285 o Minor features (testing):
11286 - Add a unit test for voting_schedule_get_start_of_next_interval().
11287 Closes ticket 26014, and helps make unit test coverage
11288 more deterministic.
11289 - A new unittests module specifically for testing the functions in
11290 the (new-ish) bridges.c module has been created with new
11291 unittests, raising the code coverage percentages. Closes 25425.
11292 - We now have improved testing for addressmap_get_virtual_address()
11293 function. This should improve our test coverage, and make our test
11294 coverage more deterministic. Closes ticket 25993.
11296 o Minor features (timekeeping, circuit scheduling):
11297 - When keeping track of how busy each circuit have been recently on
11298 a given connection, use coarse-grained monotonic timers rather
11299 than gettimeofday(). This change should marginally increase
11300 accuracy and performance. Implements part of ticket 25927.
11302 o Minor bugfixes (bandwidth management):
11303 - Consider ourselves "low on write bandwidth" if we have exhausted
11304 our write bandwidth some time in the last second. This was the
11305 documented behavior before, but the actual behavior was to change
11306 this value every TokenBucketRefillInterval. Fixes bug 25828;
11307 bugfix on 0.2.3.5-alpha.
11309 o Minor bugfixes (C correctness):
11310 - Add a missing lock acquisition in the shutdown code of the control
11311 subsystem. Fixes bug 25675; bugfix on 0.2.7.3-rc. Found by
11312 Coverity; this is CID 1433643.
11314 o Minor bugfixes (circuit path selection):
11315 - Don't count path selection failures as circuit build failures.
11316 This change should eliminate cases where Tor blames its guard or
11317 the network for situations like insufficient microdescriptors
11318 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
11321 o Minor bugfixes (client):
11322 - Don't consider Tor running as a client if the ControlPort is open,
11323 but no actual client ports are open. Fixes bug 26062; bugfix
11326 o Minor bugfixes (code style):
11327 - Fixed multiple includes of transports.h in src/or/connection.c
11328 Fixes bug 25261; bugfix on 0.2.5.1-alpha.
11329 - Remove the unused variable n_possible from the function
11330 channel_get_for_extend(). Fixes bug 25645; bugfix on 0.2.4.4-alpha
11332 o Minor bugfixes (control interface):
11333 - Respond with more human-readable error messages to GETINFO exit-
11334 policy/* requests. Also, let controller know if an error is
11335 transient (response code 551) or not (response code 552). Fixes
11336 bug 25852; bugfix on 0.2.8.1-alpha.
11338 o Minor bugfixes (controller):
11339 - Make CIRC_BW event reflect the total of all data sent on a
11340 circuit, including padding and dropped cells. Also fix a mis-
11341 counting bug when STREAM_BW events were enabled. Fixes bug 25400;
11342 bugfix on 0.2.5.2-alpha.
11344 o Minor bugfixes (correctness, client):
11345 - Upon receiving a malformed connected cell, stop processing the cell
11346 immediately. Previously we would mark the connection for close, but
11347 continue processing the cell as if the connection were open. Fixes bug
11348 26072; bugfix on 0.2.4.7-alpha.
11350 o Minor bugfixes (directory client):
11351 - When unverified-consensus is verified, rename it to cached-
11352 consenus. Fixes bug 4187; bugfix on 0.2.0.3-alpha.
11353 - Fixed launching a certificate fetch always during the scheduled
11354 periodic consensus fetch by fetching only in those cases when
11355 consensus are waiting for certs. Fixes bug 24740; bugfix
11358 o Minor bugfixes (documentation):
11359 - Stop saying in the manual that clients cache ipv4 dns answers from
11360 exit relays. We haven't used them since 0.2.6.3-alpha, and in
11361 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
11362 we forgot to say so in the man page. Fixes bug 26052; bugfix
11365 o Minor bugfixes (error reporting):
11366 - Improve tolerance for directory authorities with skewed clocks.
11367 Previously, an authority with a clock more than 60 seconds ahead
11368 could cause a client with a correct clock to warn that the
11369 client's clock was behind. Now the clocks of a majority of
11370 directory authorities have to be ahead of the client before this
11371 warning will occur. Fixes bug 25756; bugfix on 0.2.2.25-alpha.
11373 o Minor bugfixes (Linux seccomp2 sandbox):
11374 - Allow the nanosleep() system call, which glibc uses to implement
11375 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
11377 o Minor bugfixes (onion service):
11378 - Fix a memory leak when a v3 onion service is configured and gets a
11379 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
11380 - When parsing the descriptor signature, look for the token plus an
11381 extra white-space at the end. This is more correct but also will
11382 allow us to support new fields that might start with "signature".
11383 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
11385 o Minor bugfixes (path selection):
11386 - Only select relays when they have the descriptors we prefer to use
11387 for them. This change fixes a bug where we could select a relay
11388 because it had _some_ descriptor, but reject it later with a
11389 nonfatal assertion error because it didn't have the exact one we
11390 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
11392 o Minor bugfixes (portability):
11393 - Do not align mmap length, as it is not required by POSIX, and the
11394 getpagesize function is deprecated. Fixes bug 25399; bugfix
11397 o Minor bugfixes (portability, FreeBSD):
11398 - In have_enough_mem_for_dircache(), the variable DIRCACHE_MIN_MEM_MB
11399 does not stringify on FreeBSD, so we switch to tor_asprintf().
11400 Fixes bug 20887; bugfix on 0.2.8.1-alpha. Patch by Neel Chauhan.
11402 o Minor bugfixes (relay statistics):
11403 - When a relay is collecting internal statistics about how many
11404 create cell requests it has seen of each type, accurately count
11405 the requests from relays that temporarily fall out of the
11406 consensus. (To be extra conservative, we were already ignoring
11407 requests from clients in our counts, and we continue ignoring them
11408 here.) Fixes bug 24910; bugfix on 0.2.4.17-rc.
11410 o Minor bugfixes (relay, crash):
11411 - Avoid a crash when running with DirPort set but ORPort turned off.
11412 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
11414 o Minor bugfixes (restart-in-process):
11415 - When shutting down, Tor now clears all the flags in the control.c
11416 module. This should prevent a bug where authentication cookies are
11417 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
11419 o Minor bugfixes (testing):
11420 - When testing workqueue event-cancellation, make sure that we
11421 actually cancel an event, and that cancel each event with equal
11422 probability. (It was previously possible, though extremely
11423 unlikely, for our event-canceling test not to cancel any events.)
11424 Fixes bug 26008; bugfix on 0.2.6.3-alpha.
11425 - Repeat part of the test in test_client_pick_intro() a number of
11426 times, to give it consistent coverage. Fixes bug 25996; bugfix
11428 - Remove randomness from the hs_common/responsible_hsdirs test, so
11429 that it always takes the same path through the function it tests.
11430 Fixes bug 25997; bugfix on 0.3.2.1-alpha.
11431 - Change the behavior of the "channel/outbound" test so that it
11432 never causes a 10-second rollover for the EWMA circuitmux code.
11433 Previously, this behavior would happen randomly, and result in
11434 fluctuating test coverage. Fixes bug 25994; bugfix
11436 - Use X509_new() to allocate certificates that will be freed later
11437 with X509_free(). Previously, some parts of the unit tests had
11438 used tor_malloc_zero(), which is incorrect, and which caused test
11439 failures on Windows when they were built with extra hardening.
11440 Fixes bugs 25943 and 25944; bugfix on 0.2.8.1-alpha. Patch by
11442 - While running the circuit_timeout test, fix the PRNG to a
11443 deterministic AES stream, so that the test coverage from this test
11444 will itself be deterministic. Fixes bug 25995; bugfix
11447 o Minor bugfixes (vanguards):
11448 - Allow the last hop in a vanguard circuit to be the same as our
11449 first, to prevent the adversary from influencing guard node choice
11450 by choice of last hop. Also prevent the creation of A - B - A
11451 paths, or A - A paths, which are forbidden by relays. Fixes bug
11452 25870; bugfix on 0.3.3.1-alpha.
11454 o Code simplification and refactoring:
11455 - Remove duplicate code in parse_{c,s}method_line and bootstrap
11456 their functionalities into a single function. Fixes bug 6236;
11457 bugfix on 0.2.3.6-alpha.
11458 - We remove the PortForwarding and PortForwardingHelper options,
11459 related functions, and the port_forwarding tests. These options
11460 were used by the now-deprecated Vidalia to help ordinary users
11461 become Tor relays or bridges. Closes ticket 25409. Patch by
11463 - In order to make the OR and dir checking function in router.c less
11464 confusing we renamed some functions and
11465 consider_testing_reachability() has been split into
11466 router_should_check_reachability() and
11467 router_do_reachability_checks(). Also we improved the documentation
11468 in some functions. Closes ticket 18918.
11469 - Initial work to isolate Libevent usage to a handful of modules in
11470 our codebase, to simplify our call structure, and so that we can
11471 more easily change event loops in the future if needed. Closes
11473 - Introduce a function to call getsockname() and return tor_addr_t,
11474 to save a little complexity throughout the codebase. Closes
11476 - Make hsdir_index in node_t a hsdir_index_t rather than a pointer
11477 as hsdir_index is always present. Also, we move hsdir_index_t into
11478 or.h. Closes ticket 23094. Patch by Neel Chauhan.
11479 - Merge functions used for describing nodes and suppress the
11480 functions that do not allocate memory for the output buffer
11481 string. NODE_DESC_BUF_LEN constant and format_node_description()
11482 function cannot be used externally from router.c module anymore.
11483 Closes ticket 25432. Patch by valentecaio.
11484 - Our main loop has been simplified so that all important operations
11485 happen inside events. Previously, some operations had to happen
11486 outside the event loop, to prevent infinite sequences of event
11487 activations. Closes ticket 25374.
11488 - Put a SHA1 public key digest in hs_service_intro_point_t, and use
11489 it in register_intro_circ() and service_intro_point_new(). This
11490 prevents the digest from being re-calculated each time. Closes
11491 ticket 23107. Patch by Neel Chauhan.
11492 - Refactor token-bucket implementations to use a common backend.
11493 Closes ticket 25766.
11494 - Remove extern declaration of stats_n_seconds_working variable from
11495 main, protecting its accesses with get_uptime() and reset_uptime()
11496 functions. Closes ticket 25081, patch by “valentecaio”.
11497 - Remove our previous logic for "cached gettimeofday()" -- our
11498 coarse monotonic timers are fast enough for this purpose, and far
11499 less error-prone. Implements part of ticket 25927.
11500 - Remove the return value for fascist_firewall_choose_address_base(),
11501 and sister functions such as fascist_firewall_choose_address_node()
11502 and fascist_firewall_choose_address_rs(). Also, while we're here,
11503 initialize the ap argument as leaving it uninitialized can pose a
11504 security hazard. Closes ticket 24734. Patch by Neel Chauhan.
11505 - Rename two fields of connection_t struct. timestamp_lastwritten is
11506 renamed to timestamp_last_write_allowed and timestamp_lastread is
11507 renamed to timestamp_last_read_allowed. Closes ticket 24714, patch
11509 - Since Tor requires C99, remove our old workaround code for libc
11510 implementations where free(NULL) doesn't work. Closes ticket 24484.
11511 - Use our standard rate-limiting code to deal with excessive
11512 libevent failures, rather than the hand-rolled logic we had
11513 before. Closes ticket 26016.
11514 - We remove the return value of node_get_prim_orport() and
11515 node_get_prim_dirport(), and introduce node_get_prim_orport() in
11516 node_ipv6_or_preferred() and node_ipv6_dir_preferred() in order to
11517 check for a null address. Closes ticket 23873. Patch by
11519 - We switch to should_record_bridge_info() in
11520 geoip_note_client_seen() and options_need_geoip_info() instead of
11521 accessing the configuration values directly. Fixes bug 25290;
11522 bugfix on 0.2.1.6-alpha. Patch by Neel Chauhan.
11524 o Deprecated features:
11525 - As we are not recommending 0.2.5 anymore, we require relays that
11526 once had an ed25519 key associated with their RSA key to always
11527 have that key, instead of allowing them to drop back to a version
11528 that didn't support ed25519. This means they need to use a new RSA
11529 key if they want to downgrade to an older version of tor without
11530 ed25519. Closes ticket 20522.
11533 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
11534 ticket 25857. Patch from "CTassisF".
11536 o Removed features:
11537 - Directory authorities will no longer support voting according to
11538 any consensus method before consensus method 25. This keeps
11539 authorities compatible with all authorities running 0.2.9.8 and
11540 later, and does not break any clients or relays. Implements ticket
11541 24378 and proposal 290.
11542 - The PortForwarding and PortForwardingHelper features have been
11543 removed. The reasoning is, given that implementations of NAT
11544 traversal protocols within common consumer grade routers are
11545 frequently buggy, and that the target audience for a NAT punching
11546 feature is a perhaps less-technically-inclined relay operator,
11547 when the helper fails to setup traversal the problems are usually
11548 deep, ugly, and very router specific, making them horrendously
11549 impossible for technical support to reliable assist with, and thus
11550 resulting in frustration all around. Unfortunately, relay
11551 operators who would like to run relays behind NATs will need to
11552 become more familiar with the port forwarding configurations on
11553 their local router. Closes 25409.
11554 - The TestingEnableTbEmptyEvent option has been removed. It was used
11555 in testing simulations to measure how often connection buckets
11556 were emptied, in order to improve our scheduling, but it has not
11557 been actively used in years. Closes ticket 25760.
11558 - The old "round-robin" circuit multiplexer (circuitmux)
11559 implementation has been removed, along with a fairly large set of
11560 code that existed to support it. It has not been the default
11561 circuitmux since we introduced the "EWMA" circuitmux in 0.2.4.x,
11562 but it still required an unreasonable amount of memory and CPU.
11563 Closes ticket 25268.
11566 Changes in version 0.3.3.5-rc - 2018-04-15
11567 Tor 0.3.3.5-rc fixes various bugs in earlier versions of Tor,
11568 including some that could affect reliability or correctness.
11570 This is the first release candidate in the 0.3.3 series. If we find no
11571 new bugs or regression here, then the first stable 0.3.3 release will
11572 be nearly identical to this one.
11574 o Major bugfixes (security, protover, voting):
11575 - Revise Rust implementation of protover to use a more memory-
11576 efficient voting algorithm and corresponding data structures, thus
11577 avoiding a potential memory-based DoS attack where specially
11578 crafted protocol strings would expand to fill available memory.
11579 Fixes bug 24031; bugfix on 0.3.3.1-alpha.
11581 o Major bugfixes (performance, load balancing):
11582 - Directory authorities no longer vote in favor of the Guard flag
11583 for relays without directory support. Starting in Tor
11584 0.3.0.1-alpha, clients have been avoiding using such relays in the
11585 Guard position, leading to increasingly broken load balancing for
11586 the 5%-or-so of Guards that don't advertise directory support.
11587 Fixes bug 22310; bugfix on 0.3.0.6.
11589 o Minor feature (continuous integration):
11590 - Update the Travis CI configuration to use the stable Rust channel,
11591 now that we have decided to require that. Closes ticket 25714.
11593 o Minor features (config options):
11594 - Change the way the default value for MaxMemInQueues is calculated.
11595 We now use 40% of the hardware RAM if the system has 8 GB RAM or
11596 more. Otherwise we use the former value of 75%. Closes
11599 o Minor features (geoip):
11600 - Update geoip and geoip6 to the April 3 2018 Maxmind GeoLite2
11601 Country database. Closes ticket 25718.
11603 o Minor bugfixes (client):
11604 - When using a listed relay as a bridge, and also using
11605 microdescriptors, and considering that relay as a non-bridge in a
11606 circuit, treat its microdescriptor as a valid source of
11607 information about that relay. This change should prevent a non-
11608 fatal assertion error. Fixes bug 25691; bugfix on 0.3.3.4-alpha.
11610 o Minor bugfixes (controller):
11611 - Restore the correct operation of the RESOLVE command, which had
11612 been broken since we added the ability to enable/disable DNS on
11613 specific listener ports. Fixes bug 25617; bugfix on 0.2.9.3-alpha.
11615 o Minor bugfixes (distribution, compilation, rust):
11616 - Build correctly when the rust dependencies submodule is loaded,
11617 but the TOR_RUST_DEPENDENCIES environment variable is not set.
11618 Fixes bug 25679; bugfix on 0.3.3.1-alpha.
11619 - Actually include all of our Rust source in our source
11620 distributions. (Previously, a few of the files were accidentally
11621 omitted.) Fixes bug 25732; bugfix on 0.3.3.2-alpha.
11623 o Minor bugfixes (documentation):
11624 - Document that the PerConnBW{Rate,Burst} options will fall back to
11625 their corresponding consensus parameters only if those parameters
11626 are set. Previously we had claimed that these values would always
11627 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
11628 - Revert a misformatting issue in the ExitPolicy documentation.
11629 Fixes bug 25582; bugfix on 0.3.3.1-alpha.
11631 o Minor bugfixes (exit relay DNS retries):
11632 - Re-attempt timed-out DNS queries 3 times before failure, since our
11633 timeout is 5 seconds for them, but clients wait 10-15. Also allow
11634 slightly more timeouts per resolver when an exit has multiple
11635 resolvers configured. Fixes bug 21394; bugfix on 0.3.1.9.
11637 o Minor bugfixes (onion services):
11638 - Re-instate counting the client HSDir fetch circuits against the
11639 MaxClientCircuitsPending rate limit. Fixes bug 24989; bugfix
11641 - Remove underscores from the _HSLayer{2,3}Nodes options. This
11642 expert-user configuration can now be enabled as HSLayer{2,3}Nodes.
11643 Fixes bug 25581; bugfix on 0.3.3.1-alpha
11645 o Code simplification and refactoring:
11646 - Move the list of default directory authorities to its own file.
11647 Closes ticket 24854. Patch by "beastr0".
11649 o Documentation (manpage, denial of service):
11650 - Provide more detail about the denial-of-service options, by
11651 listing each mitigation and explaining how they relate. Closes
11655 Changes in version 0.3.3.4-alpha - 2018-03-29
11656 Tor 0.3.3.4-alpha includes various bugfixes for issues found during
11657 the alpha testing of earlier releases in its series. We are
11658 approaching a stable 0.3.3.4-alpha release: more testing is welcome!
11660 o New system requirements:
11661 - When built with Rust, Tor now depends on version 0.2.39 of the
11662 libc crate. Closes tickets 25310 and 25664.
11664 o Major bugfixes (relay, connection):
11665 - If we have failed to connect to a relay and received a connection
11666 refused, timeout, or similar error (at the TCP level), do not try
11667 that same address/port again for 60 seconds after the failure has
11668 occurred. Fixes bug 24767; bugfix on 0.0.6.
11670 o Minor features (geoip):
11671 - Update geoip and geoip6 to the March 8 2018 Maxmind GeoLite2
11672 Country database. Closes ticket 25469.
11674 o Minor features (log messages):
11675 - Improve log message in the out-of-memory handler to include
11676 information about memory usage from the different compression
11677 backends. Closes ticket 25372.
11679 o Minor features (sandbox):
11680 - Explicitly permit the poll() system call when the Linux
11681 seccomp2-based sandbox is enabled: apparently, some versions of
11682 libc use poll() when calling getpwnam(). Closes ticket 25313.
11684 o Minor bugfixes (C correctness):
11685 - Fix a very unlikely (impossible, we believe) null pointer
11686 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
11687 Coverity; this is CID 1430932.
11689 o Minor bugfixes (channel, client):
11690 - Better identify client connection when reporting to the geoip
11691 client cache. Fixes bug 24904; bugfix on 0.3.1.7.
11693 o Minor bugfixes (compilation):
11694 - Fix a C99 compliance issue in our configuration script that caused
11695 compilation issues when compiling Tor with certain versions of
11696 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
11698 o Minor bugfixes (controller, reliability):
11699 - Avoid a (nonfatal) assertion failure when extending a one-hop
11700 circuit from the controller to become a multihop circuit. Fixes
11701 bug 24903; bugfix on 0.2.5.2-alpha.
11703 o Major bugfixes (networking):
11704 - Tor will no longer reject IPv6 address strings from Tor Browser
11705 when they are passed as hostnames in SOCKS5 requests. Fixes bug
11706 25036, bugfix on Tor 0.3.1.2.
11708 o Minor bugfixes (networking):
11709 - string_is_valid_hostname() will not consider IP strings to be
11710 valid hostnames. Fixes bug 25055; bugfix on Tor 0.2.5.5.
11712 o Minor bugfixes (onion service v3):
11713 - Avoid an assertion failure when the next onion service
11714 descriptor rotation type is out of sync with the consensus's
11715 valid-after time. Instead, log a warning message with extra
11716 information, so we can better hunt down the cause of this
11717 assertion. Fixes bug 25306; bugfix on 0.3.2.1-alpha.
11719 o Minor bugfixes (testing):
11720 - Avoid intermittent test failures due to a test that had relied on
11721 onion service introduction point creation finishing within 5
11722 seconds of real clock time. Fixes bug 25450; bugfix
11724 - Rust crates are now automatically detected and tested. Previously,
11725 some crates were not tested by `make test-rust` due to a static
11726 string in the `src/test/test_rust.sh` script specifying which
11727 crates to test. Fixes bug 25560; bugfix on 0.3.3.3-alpha.
11729 o Minor bugfixes (testing, benchmarks):
11730 - Fix a crash when running benchmark tests on win32 systems. The
11731 crash was due to a mutex that wasn't initialized before logging
11732 and options were initialized. Fixes bug 25479; bugfix
11735 o Minor bugfixes (warnings, ipv6):
11736 - Avoid a bug warning that could occur when trying to connect to a
11737 relay over IPv6. This warning would occur on a Tor instance that
11738 downloads router descriptors, but prefers to use microdescriptors.
11739 Fixes bug 25213; bugfix on 0.3.3.1-alpha.
11741 o Code simplification and refactoring:
11742 - Remove the old (deterministic) directory retry logic entirely:
11743 We've used exponential backoff exclusively for some time. Closes
11747 - Improved the documentation of AccountingStart parameter. Closes
11749 - Update the documentation for "Log" to include the current list of
11750 logging domains. Closes ticket 25378.
11753 Changes in version 0.3.1.10 - 2018-03-03
11754 Tor 0.3.1.10 backports a number of bugfixes, including important fixes for
11757 It includes an important security fix for a remote crash attack
11758 against directory authorities, tracked as TROVE-2018-001.
11760 This release also backports our new system for improved resistance to
11761 denial-of-service attacks against relays.
11763 This release also fixes several minor bugs and annoyances from
11766 All directory authorities should upgrade to one of the versions
11767 released today. Relays running 0.3.1.x may wish to update to one of
11768 the versions released today, for the DoS mitigations.
11770 Please note: according to our release calendar, Tor 0.3.1 will no
11771 longer be supported after 1 July 2018. If you will be running Tor
11772 after that date, you should make sure to plan to upgrade to the latest
11773 stable version, or downgrade to 0.2.9 (which will receive long-term
11776 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
11777 - Fix a protocol-list handling bug that could be used to remotely crash
11778 directory authorities with a null-pointer exception. Fixes bug 25074;
11779 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
11782 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
11783 - Give relays some defenses against the recent network overload. We
11784 start with three defenses (default parameters in parentheses).
11785 First: if a single client address makes too many concurrent
11786 connections (>100), hang up on further connections. Second: if a
11787 single client address makes circuits too quickly (more than 3 per
11788 second, with an allowed burst of 90) while also having too many
11789 connections open (3), refuse new create cells for the next while
11790 (1-2 hours). Third: if a client asks to establish a rendezvous
11791 point to you directly, ignore the request. These defenses can be
11792 manually controlled by new torrc options, but relays will also
11793 take guidance from consensus parameters, so there's no need to
11794 configure anything manually. Implements ticket 24902.
11796 o Minor features (linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
11797 - Update the sandbox rules so that they should now work correctly
11798 with Glibc 2.26. Closes ticket 24315.
11800 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
11801 - Fix an "off by 2" error in counting rendezvous failures on the
11802 onion service side. While we thought we would stop the rendezvous
11803 attempt after one failed circuit, we were actually making three
11804 circuit attempts before giving up. Now switch to a default of 2,
11805 and allow the consensus parameter "hs_service_max_rdv_failures" to
11806 override. Fixes bug 24895; bugfix on 0.0.6.
11808 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
11809 - Add Link protocol version 5 to the supported protocols list. Fixes
11810 bug 25070; bugfix on 0.3.1.1-alpha.
11812 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
11813 - Fix a set of false positives where relays would consider
11814 connections to other relays as being client-only connections (and
11815 thus e.g. deserving different link padding schemes) if those
11816 relays fell out of the consensus briefly. Now we look only at the
11817 initial handshake and whether the connection authenticated as a
11818 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
11820 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
11821 - Make our OOM handler aware of the geoip client history cache so it
11822 doesn't fill up the memory. This check is important for IPv6 and
11823 our DoS mitigation subsystem. Closes ticket 25122.
11825 o Minor feature (relay statistics, backport from 0.3.2.6-alpha):
11826 - Change relay bandwidth reporting stats interval from 4 hours to 24
11827 hours in order to reduce the efficiency of guard discovery
11828 attacks. Fixes ticket 23856.
11830 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
11831 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
11832 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
11833 since they neither disabled TLS 1.3 nor enabled any of the
11834 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
11835 Closes ticket 24978.
11837 o Minor features (fallback directory mirrors, backport from 0.3.2.9):
11838 - The fallback directory list has been re-generated based on the
11839 current status of the network. Tor uses fallback directories to
11840 bootstrap when it doesn't yet have up-to-date directory
11841 information. Closes ticket 24801.
11842 - Make the default DirAuthorityFallbackRate 0.1, so that clients
11843 prefer to bootstrap from fallback directory mirrors. This is a
11844 follow-up to 24679, which removed weights from the default
11845 fallbacks. Implements ticket 24681.
11847 o Minor features (geoip):
11848 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
11851 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
11852 - Use the actual observed address of an incoming relay connection,
11853 not the canonical address of the relay from its descriptor, when
11854 making decisions about how to handle the incoming connection.
11855 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
11857 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
11858 - Directory authorities, when refusing a descriptor from a rejected
11859 relay, now explicitly tell the relay (in its logs) to set a valid
11860 ContactInfo address and contact the bad-relays@ mailing list.
11861 Fixes bug 25170; bugfix on 0.2.9.1.
11863 o Minor bugfixes (address selection, backport from 0.3.2.9):
11864 - When the fascist_firewall_choose_address_ functions don't find a
11865 reachable address, set the returned address to the null address
11866 and port. This is a precautionary measure, because some callers do
11867 not check the return value. Fixes bug 24736; bugfix
11870 o Major bugfixes (bootstrapping, backport from 0.3.2.5-alpha):
11871 - Fetch descriptors aggressively whenever we lack enough to build
11872 circuits, regardless of how many descriptors we are missing.
11873 Previously, we would delay launching the fetch when we had fewer
11874 than 15 missing descriptors, even if some of those descriptors
11875 were blocking circuits from building. Fixes bug 23985; bugfix on
11876 0.1.1.11-alpha. The effects of this bug became worse in
11877 0.3.0.3-alpha, when we began treating missing descriptors from our
11878 primary guards as a reason to delay circuits.
11879 - Don't try fetching microdescriptors from relays that have failed
11880 to deliver them in the past. Fixes bug 23817; bugfix
11883 o Minor bugfixes (compilation, backport from 0.3.2.7-rc):
11884 - Fix a signed/unsigned comparison warning introduced by our fix to
11885 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
11887 o Minor bugfixes (control port, linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
11888 - Avoid a crash when attempting to use the seccomp2 sandbox together
11889 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
11892 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
11893 - Fix a possible crash on malformed consensus. If a consensus had
11894 contained an unparseable protocol line, it could have made clients
11895 and relays crash with a null-pointer exception. To exploit this
11896 issue, however, an attacker would need to be able to subvert the
11897 directory authority system. Fixes bug 25251; bugfix on
11898 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
11900 o Minor bugfixes (directory cache, backport from 0.3.2.5-alpha):
11901 - Recover better from empty or corrupt files in the consensus cache
11902 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
11903 - When a consensus diff calculation is only partially successful,
11904 only record the successful parts as having succeeded. Partial
11905 success can happen if (for example) one compression method fails
11906 but the others succeed. Previously we misrecorded all the
11907 calculations as having succeeded, which would later cause a
11908 nonfatal assertion failure. Fixes bug 24086; bugfix
11911 o Minor bugfixes (entry guards, backport from 0.3.2.3-alpha):
11912 - Tor now updates its guard state when it reads a consensus
11913 regardless of whether it's missing descriptors. That makes tor use
11914 its primary guards to fetch descriptors in some edge cases where
11915 it would previously have used fallback directories. Fixes bug
11916 23862; bugfix on 0.3.0.1-alpha.
11918 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
11919 - Don't treat inability to store a cached consensus object as a bug:
11920 it can happen normally when we are out of disk space. Fixes bug
11921 24859; bugfix on 0.3.1.1-alpha.
11923 o Minor bugfixes (memory usage, backport from 0.3.2.8-rc):
11924 - When queuing DESTROY cells on a channel, only queue the circuit-id
11925 and reason fields: not the entire 514-byte cell. This fix should
11926 help mitigate any bugs or attacks that fill up these queues, and
11927 free more RAM for other uses. Fixes bug 24666; bugfix
11930 o Minor bugfixes (network layer, backport from 0.3.2.5-alpha):
11931 - When closing a connection via close_connection_immediately(), we
11932 mark it as "not blocked on bandwidth", to prevent later calls from
11933 trying to unblock it, and give it permission to read. This fixes a
11934 backtrace warning that can happen on relays under various
11935 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
11937 o Minor bugfixes (path selection, backport from 0.3.2.4-alpha):
11938 - When selecting relays by bandwidth, avoid a rounding error that
11939 could sometimes cause load to be imbalanced incorrectly.
11940 Previously, we would always round upwards; now, we round towards
11941 the nearest integer. This had the biggest effect when a relay's
11942 weight adjustments should have given it weight 0, but it got
11943 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
11944 - When calculating the fraction of nodes that have descriptors, and
11945 all nodes in the network have zero bandwidths, count the number of
11946 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
11947 - Actually log the total bandwidth in compute_weighted_bandwidths().
11948 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
11950 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
11951 - Improve the performance of our consensus-diff application code
11952 when Tor is built with the --enable-fragile-hardening option set.
11953 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
11955 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
11956 - Don't exit the Tor process if setrlimit() fails to change the file
11957 limit (which can happen sometimes on some versions of OSX). Fixes
11958 bug 21074; bugfix on 0.0.9pre5.
11960 o Minor bugfixes (portability, msvc, backport from 0.3.2.9):
11961 - Fix a bug in the bit-counting parts of our timing-wheel code on
11962 MSVC. (Note that MSVC is still not a supported build platform, due
11963 to cyptographic timing channel risks.) Fixes bug 24633; bugfix
11966 o Minor bugfixes (relay, partial backport):
11967 - Make the internal channel_is_client() function look at what sort
11968 of connection handshake the other side used, rather than whether
11969 the other side ever sent a create_fast cell to us. Backports part
11970 of the fixes from bugs 22805 and 24898.
11972 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
11973 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
11975 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
11976 bugfix on 0.2.9.4-alpha.
11978 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
11979 - Update the "rust dependencies" submodule to be a project-level
11980 repository, rather than a user repository. Closes ticket 25323.
11983 Changes in version 0.2.9.15 - 2018-03-03
11984 Tor 0.2.9.15 backports important security and stability bugfixes from
11985 later Tor releases.
11987 It includes an important security fix for a remote crash attack
11988 against directory authorities, tracked as TROVE-2018-001.
11990 This release also backports our new system for improved resistance to
11991 denial-of-service attacks against relays.
11993 This release also fixes several minor bugs and annoyances from
11996 All directory authorities should upgrade to one of the versions
11997 released today. Relays running 0.2.9.x may wish to update to one of
11998 the versions released today, for the DoS mitigations.
12000 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
12001 - Fix a protocol-list handling bug that could be used to remotely crash
12002 directory authorities with a null-pointer exception. Fixes bug 25074;
12003 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
12006 o Major features (denial-of-service mitigation):
12007 - Give relays some defenses against the recent network overload. We
12008 start with three defenses (default parameters in parentheses).
12009 First: if a single client address makes too many concurrent
12010 connections (>100), hang up on further connections. Second: if a
12011 single client address makes circuits too quickly (more than 3 per
12012 second, with an allowed burst of 90) while also having too many
12013 connections open (3), refuse new create cells for the next while
12014 (1-2 hours). Third: if a client asks to establish a rendezvous
12015 point to you directly, ignore the request. These defenses can be
12016 manually controlled by new torrc options, but relays will also
12017 take guidance from consensus parameters, so there's no need to
12018 configure anything manually. Implements ticket 24902.
12020 o Major bugfixes (bootstrapping):
12021 - Fetch descriptors aggressively whenever we lack enough to build
12022 circuits, regardless of how many descriptors we are missing.
12023 Previously, we would delay launching the fetch when we had fewer
12024 than 15 missing descriptors, even if some of those descriptors
12025 were blocking circuits from building. Fixes bug 23985; bugfix on
12026 0.1.1.11-alpha. The effects of this bug became worse in
12027 0.3.0.3-alpha, when we began treating missing descriptors from our
12028 primary guards as a reason to delay circuits.
12030 o Major bugfixes (onion services, retry behavior):
12031 - Fix an "off by 2" error in counting rendezvous failures on the
12032 onion service side. While we thought we would stop the rendezvous
12033 attempt after one failed circuit, we were actually making three
12034 circuit attempts before giving up. Now switch to a default of 2,
12035 and allow the consensus parameter "hs_service_max_rdv_failures" to
12036 override. Fixes bug 24895; bugfix on 0.0.6.
12038 o Minor feature (relay statistics):
12039 - Change relay bandwidth reporting stats interval from 4 hours to 24
12040 hours in order to reduce the efficiency of guard discovery
12041 attacks. Fixes ticket 23856.
12043 o Minor features (compatibility, OpenSSL):
12044 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
12045 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
12046 since they neither disabled TLS 1.3 nor enabled any of the
12047 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
12048 Closes ticket 24978.
12050 o Minor features (denial-of-service avoidance):
12051 - Make our OOM handler aware of the geoip client history cache so it
12052 doesn't fill up the memory. This check is important for IPv6 and
12053 our DoS mitigation subsystem. Closes ticket 25122.
12055 o Minor features (fallback directory mirrors):
12056 - The fallback directory list has been re-generated based on the
12057 current status of the network. Tor uses fallback directories to
12058 bootstrap when it doesn't yet have up-to-date directory
12059 information. Closes ticket 24801.
12060 - Make the default DirAuthorityFallbackRate 0.1, so that clients
12061 prefer to bootstrap from fallback directory mirrors. This is a
12062 follow-up to 24679, which removed weights from the default
12063 fallbacks. Implements ticket 24681.
12065 o Minor features (geoip):
12066 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
12069 o Minor features (linux seccomp2 sandbox):
12070 - Update the sandbox rules so that they should now work correctly
12071 with Glibc 2.26. Closes ticket 24315.
12073 o Minor bugfix (channel connection):
12074 - Use the actual observed address of an incoming relay connection,
12075 not the canonical address of the relay from its descriptor, when
12076 making decisions about how to handle the incoming connection.
12077 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
12079 o Minor bugfix (directory authority):
12080 - Directory authorities, when refusing a descriptor from a rejected
12081 relay, now explicitly tell the relay (in its logs) to set a valid
12082 ContactInfo address and contact the bad-relays@ mailing list.
12083 Fixes bug 25170; bugfix on 0.2.9.1.
12085 o Minor bugfixes (address selection):
12086 - When the fascist_firewall_choose_address_ functions don't find a
12087 reachable address, set the returned address to the null address
12088 and port. This is a precautionary measure, because some callers do
12089 not check the return value. Fixes bug 24736; bugfix
12092 o Minor bugfixes (compilation):
12093 - Fix a signed/unsigned comparison warning introduced by our fix to
12094 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
12096 o Minor bugfixes (control port, linux seccomp2 sandbox):
12097 - Avoid a crash when attempting to use the seccomp2 sandbox together
12098 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
12101 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
12102 - Fix a possible crash on malformed consensus. If a consensus had
12103 contained an unparseable protocol line, it could have made clients
12104 and relays crash with a null-pointer exception. To exploit this
12105 issue, however, an attacker would need to be able to subvert the
12106 directory authority system. Fixes bug 25251; bugfix on
12107 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
12109 o Minor bugfixes (memory usage):
12110 - When queuing DESTROY cells on a channel, only queue the circuit-id
12111 and reason fields: not the entire 514-byte cell. This fix should
12112 help mitigate any bugs or attacks that fill up these queues, and
12113 free more RAM for other uses. Fixes bug 24666; bugfix
12116 o Minor bugfixes (network layer):
12117 - When closing a connection via close_connection_immediately(), we
12118 mark it as "not blocked on bandwidth", to prevent later calls from
12119 trying to unblock it, and give it permission to read. This fixes a
12120 backtrace warning that can happen on relays under various
12121 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
12123 o Minor bugfixes (OSX):
12124 - Don't exit the Tor process if setrlimit() fails to change the file
12125 limit (which can happen sometimes on some versions of OSX). Fixes
12126 bug 21074; bugfix on 0.0.9pre5.
12128 o Minor bugfixes (path selection):
12129 - When selecting relays by bandwidth, avoid a rounding error that
12130 could sometimes cause load to be imbalanced incorrectly.
12131 Previously, we would always round upwards; now, we round towards
12132 the nearest integer. This had the biggest effect when a relay's
12133 weight adjustments should have given it weight 0, but it got
12134 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
12135 - When calculating the fraction of nodes that have descriptors, and
12136 all nodes in the network have zero bandwidths, count the number of
12137 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
12138 - Actually log the total bandwidth in compute_weighted_bandwidths().
12139 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
12141 o Minor bugfixes (portability, msvc):
12142 - Fix a bug in the bit-counting parts of our timing-wheel code on
12143 MSVC. (Note that MSVC is still not a supported build platform, due
12144 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
12147 o Minor bugfixes (relay):
12148 - Make the internal channel_is_client() function look at what sort
12149 of connection handshake the other side used, rather than whether
12150 the other side ever sent a create_fast cell to us. Backports part
12151 of the fixes from bugs 22805 and 24898.
12153 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
12154 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
12156 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
12157 bugfix on 0.2.9.4-alpha.
12160 Changes in version 0.3.2.10 - 2018-03-03
12161 Tor 0.3.2.10 is the second stable release in the 0.3.2 series. It
12162 backports a number of bugfixes, including important fixes for security
12165 It includes an important security fix for a remote crash attack
12166 against directory authorities, tracked as TROVE-2018-001.
12168 Additionally, it backports a fix for a bug whose severity we have
12169 upgraded: Bug 24700, which was fixed in 0.3.3.2-alpha, can be remotely
12170 triggered in order to crash relays with a use-after-free pattern. As
12171 such, we are now tracking that bug as TROVE-2018-002 and
12172 CVE-2018-0491, and backporting it to earlier releases. This bug
12173 affected versions 0.3.2.1-alpha through 0.3.2.9, as well as version
12176 This release also backports our new system for improved resistance to
12177 denial-of-service attacks against relays.
12179 This release also fixes several minor bugs and annoyances from
12182 Relays running 0.3.2.x SHOULD upgrade to one of the versions released
12183 today, for the fix to TROVE-2018-002. Directory authorities should
12184 also upgrade. (Relays on earlier versions might want to update too for
12185 the DoS mitigations.)
12187 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
12188 - Fix a protocol-list handling bug that could be used to remotely crash
12189 directory authorities with a null-pointer exception. Fixes bug 25074;
12190 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
12193 o Major bugfixes (scheduler, KIST, denial-of-service, backport from 0.3.3.2-alpha):
12194 - Avoid adding the same channel twice in the KIST scheduler pending
12195 list, which could lead to remote denial-of-service use-after-free
12196 attacks against relays. Fixes bug 24700; bugfix on 0.3.2.1-alpha.
12198 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
12199 - Give relays some defenses against the recent network overload. We
12200 start with three defenses (default parameters in parentheses).
12201 First: if a single client address makes too many concurrent
12202 connections (>100), hang up on further connections. Second: if a
12203 single client address makes circuits too quickly (more than 3 per
12204 second, with an allowed burst of 90) while also having too many
12205 connections open (3), refuse new create cells for the next while
12206 (1-2 hours). Third: if a client asks to establish a rendezvous
12207 point to you directly, ignore the request. These defenses can be
12208 manually controlled by new torrc options, but relays will also
12209 take guidance from consensus parameters, so there's no need to
12210 configure anything manually. Implements ticket 24902.
12212 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
12213 - Fix an "off by 2" error in counting rendezvous failures on the
12214 onion service side. While we thought we would stop the rendezvous
12215 attempt after one failed circuit, we were actually making three
12216 circuit attempts before giving up. Now switch to a default of 2,
12217 and allow the consensus parameter "hs_service_max_rdv_failures" to
12218 override. Fixes bug 24895; bugfix on 0.0.6.
12219 - New-style (v3) onion services now obey the "max rendezvous circuit
12220 attempts" logic. Previously they would make as many rendezvous
12221 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
12222 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
12224 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
12225 - Add Link protocol version 5 to the supported protocols list. Fixes
12226 bug 25070; bugfix on 0.3.1.1-alpha.
12228 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
12229 - Fix a set of false positives where relays would consider
12230 connections to other relays as being client-only connections (and
12231 thus e.g. deserving different link padding schemes) if those
12232 relays fell out of the consensus briefly. Now we look only at the
12233 initial handshake and whether the connection authenticated as a
12234 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
12236 o Major bugfixes (scheduler, consensus, backport from 0.3.3.2-alpha):
12237 - The scheduler subsystem was failing to promptly notice changes in
12238 consensus parameters, making it harder to switch schedulers
12239 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
12241 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
12242 - Make our OOM handler aware of the geoip client history cache so it
12243 doesn't fill up the memory. This check is important for IPv6 and
12244 our DoS mitigation subsystem. Closes ticket 25122.
12246 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
12247 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
12248 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
12249 since they neither disabled TLS 1.3 nor enabled any of the
12250 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
12251 Closes ticket 24978.
12253 o Minor features (geoip):
12254 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
12257 o Minor features (logging, diagnostic, backport from 0.3.3.2-alpha):
12258 - When logging a failure to create an onion service's descriptor,
12259 also log what the problem with the descriptor was. Diagnostic
12262 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
12263 - Use the actual observed address of an incoming relay connection,
12264 not the canonical address of the relay from its descriptor, when
12265 making decisions about how to handle the incoming connection.
12266 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
12268 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
12269 - Fix a possible crash on malformed consensus. If a consensus had
12270 contained an unparseable protocol line, it could have made clients
12271 and relays crash with a null-pointer exception. To exploit this
12272 issue, however, an attacker would need to be able to subvert the
12273 directory authority system. Fixes bug 25251; bugfix on
12274 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
12276 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
12277 - Directory authorities, when refusing a descriptor from a rejected
12278 relay, now explicitly tell the relay (in its logs) to set a valid
12279 ContactInfo address and contact the bad-relays@ mailing list.
12280 Fixes bug 25170; bugfix on 0.2.9.1.
12282 o Minor bugfixes (build, rust, backport from 0.3.3.1-alpha):
12283 - When building with Rust on OSX, link against libresolv, to work
12284 around the issue at https://github.com/rust-lang/rust/issues/46797.
12285 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
12287 o Minor bugfixes (onion services, backport from 0.3.3.2-alpha):
12288 - Remove a BUG() statement when a client fetches an onion descriptor
12289 that has a lower revision counter than the one in its cache. This
12290 can happen in normal circumstances due to HSDir desync. Fixes bug
12291 24976; bugfix on 0.3.2.1-alpha.
12293 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
12294 - Don't treat inability to store a cached consensus object as a bug:
12295 it can happen normally when we are out of disk space. Fixes bug
12296 24859; bugfix on 0.3.1.1-alpha.
12298 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
12299 - Improve the performance of our consensus-diff application code
12300 when Tor is built with the --enable-fragile-hardening option set.
12301 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
12303 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
12304 - Don't exit the Tor process if setrlimit() fails to change the file
12305 limit (which can happen sometimes on some versions of OSX). Fixes
12306 bug 21074; bugfix on 0.0.9pre5.
12308 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
12309 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
12311 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
12312 bugfix on 0.2.9.4-alpha.
12314 o Minor bugfixes (testing, backport from 0.3.3.1-alpha):
12315 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
12316 25005; bugfix on 0.3.2.7-rc.
12318 o Minor bugfixes (v3 onion services, backport from 0.3.3.2-alpha):
12319 - Look at the "HSRend" protocol version, not the "HSDir" protocol
12320 version, when deciding whether a consensus entry can support the
12321 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
12322 bugfix on 0.3.2.1-alpha.
12324 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
12325 - Update the "rust dependencies" submodule to be a project-level
12326 repository, rather than a user repository. Closes ticket 25323.
12328 o Documentation (backport from 0.3.3.1-alpha)
12329 - Document that operators who run more than one relay or bridge are
12330 expected to set MyFamily and ContactInfo correctly. Closes
12334 Changes in version 0.3.3.3-alpha - 2018-03-03
12335 Tor 0.3.3.3-alpha is the third alpha release for the 0.3.3.x series.
12336 It includes an important security fix for a remote crash attack
12337 against directory authorities tracked as TROVE-2018-001.
12339 Additionally, with this release, we are upgrading the severity of a
12340 bug fixed in 0.3.3.2-alpha. Bug 24700, which was fixed in
12341 0.3.3.2-alpha, can be remotely triggered in order to crash relays with
12342 a use-after-free pattern. As such, we are now tracking that bug as
12343 TROVE-2018-002 and CVE-2018-0491. This bug affected versions
12344 0.3.2.1-alpha through 0.3.2.9, as well as 0.3.3.1-alpha.
12346 This release also fixes several minor bugs and annoyances from
12349 Relays running 0.3.2.x should upgrade to one of the versions released
12350 today, for the fix to TROVE-2018-002. Directory authorities should
12351 also upgrade. (Relays on earlier versions might want to update too for
12352 the DoS mitigations.)
12354 o Major bugfixes (denial-of-service, directory authority):
12355 - Fix a protocol-list handling bug that could be used to remotely crash
12356 directory authorities with a null-pointer exception. Fixes bug 25074;
12357 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
12360 o Minor features (compatibility, OpenSSL):
12361 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
12362 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
12363 since they neither disabled TLS 1.3 nor enabled any of the
12364 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
12365 Closes ticket 24978.
12367 o Minor features (logging):
12368 - Clarify the log messages produced when getrandom() or a related
12369 entropy-generation mechanism gives an error. Closes ticket 25120.
12371 o Minor features (testing):
12372 - Add a "make test-rust" target to run the rust tests only. Closes
12375 o Minor bugfixes (denial-of-service):
12376 - Fix a possible crash on malformed consensus. If a consensus had
12377 contained an unparseable protocol line, it could have made clients
12378 and relays crash with a null-pointer exception. To exploit this
12379 issue, however, an attacker would need to be able to subvert the
12380 directory authority system. Fixes bug 25251; bugfix on
12381 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
12383 o Minor bugfixes (DoS mitigation):
12384 - Add extra safety checks when refilling the circuit creation bucket
12385 to ensure we never set a value above the allowed maximum burst.
12386 Fixes bug 25202; bugfix on 0.3.3.2-alpha.
12387 - When a new consensus arrives, don't update our DoS-mitigation
12388 parameters if we aren't a public relay. Fixes bug 25223; bugfix
12391 o Minor bugfixes (man page, SocksPort):
12392 - Remove dead code from the old "SocksSocket" option, and rename
12393 SocksSocketsGroupWritable to UnixSocksGroupWritable. The old option
12394 still works, but is deprecated. Fixes bug 24343; bugfix on 0.2.6.3.
12396 o Minor bugfixes (performance):
12397 - Reduce the number of circuits that will be opened at once during
12398 the circuit build timeout phase. This is done by increasing the
12399 idle timeout to 3 minutes, and lowering the maximum number of
12400 concurrent learning circuits to 10. Fixes bug 24769; bugfix
12403 o Minor bugfixes (spec conformance):
12404 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
12406 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
12407 bugfix on 0.2.9.4-alpha.
12409 o Minor bugfixes (spec conformance, rust):
12410 - Resolve a denial-of-service issue caused by an infinite loop in
12411 the rust protover code. Fixes bug 25250, bugfix on 0.3.3.1-alpha.
12412 Also tracked as TROVE-2018-003.
12414 o Code simplification and refactoring:
12415 - Update the "rust dependencies" submodule to be a project-level
12416 repository, rather than a user repository. Closes ticket 25323.
12419 Changes in version 0.3.3.2-alpha - 2018-02-10
12420 Tor 0.3.3.2-alpha is the second alpha in the 0.3.3.x series. It
12421 introduces a mechanism to handle the high loads that many relay
12422 operators have been reporting recently. It also fixes several bugs in
12423 older releases. If this new code proves reliable, we plan to backport
12424 it to older supported release series.
12426 o Major features (denial-of-service mitigation):
12427 - Give relays some defenses against the recent network overload. We
12428 start with three defenses (default parameters in parentheses).
12429 First: if a single client address makes too many concurrent
12430 connections (>100), hang up on further connections. Second: if a
12431 single client address makes circuits too quickly (more than 3 per
12432 second, with an allowed burst of 90) while also having too many
12433 connections open (3), refuse new create cells for the next while
12434 (1-2 hours). Third: if a client asks to establish a rendezvous
12435 point to you directly, ignore the request. These defenses can be
12436 manually controlled by new torrc options, but relays will also
12437 take guidance from consensus parameters, so there's no need to
12438 configure anything manually. Implements ticket 24902.
12440 o Major bugfixes (netflow padding):
12441 - Stop adding unneeded channel padding right after we finish
12442 flushing to a connection that has been trying to flush for many
12443 seconds. Instead, treat all partial or complete flushes as
12444 activity on the channel, which will defer the time until we need
12445 to add padding. This fix should resolve confusing and scary log
12446 messages like "Channel padding timeout scheduled 221453ms in the
12447 past." Fixes bug 22212; bugfix on 0.3.1.1-alpha.
12449 o Major bugfixes (protocol versions):
12450 - Add Link protocol version 5 to the supported protocols list. Fixes
12451 bug 25070; bugfix on 0.3.1.1-alpha.
12453 o Major bugfixes (scheduler, consensus):
12454 - The scheduler subsystem was failing to promptly notice changes in
12455 consensus parameters, making it harder to switch schedulers
12456 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
12458 o Minor features (denial-of-service avoidance):
12459 - Make our OOM handler aware of the geoip client history cache so it
12460 doesn't fill up the memory. This check is important for IPv6 and
12461 our DoS mitigation subsystem. Closes ticket 25122.
12463 o Minor features (directory authority):
12464 - When directory authorities are unable to add signatures to a
12465 pending consensus, log the reason why. Closes ticket 24849.
12467 o Minor features (geoip):
12468 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
12471 o Minor features (logging, diagnostic):
12472 - When logging a failure to create an onion service's descriptor,
12473 also log what the problem with the descriptor was. Diagnostic for
12476 o Minor bugfix (channel connection):
12477 - Use the actual observed address of an incoming relay connection,
12478 not the canonical address of the relay from its descriptor, when
12479 making decisions about how to handle the incoming connection.
12480 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
12482 o Minor bugfix (directory authority):
12483 - Directory authorities, when refusing a descriptor from a rejected
12484 relay, now explicitly tell the relay (in its logs) to set a valid
12485 ContactInfo address and contact the bad-relays@ mailing list.
12486 Fixes bug 25170; bugfix on 0.2.9.1.
12488 o Minor bugfixes (all versions of Tor):
12489 - Use the "misspell" tool to detect and fix typos throughout the
12490 source code. Fixes bug 23650; bugfix on various versions of Tor.
12491 Patch from Deepesh Pathak.
12493 o Minor bugfixes (circuit, cannibalization):
12494 - Don't cannibalize preemptively-built circuits if we no longer
12495 recognize their first hop. This situation can happen if our Guard
12496 relay went off the consensus after the circuit was created. Fixes
12497 bug 24469; bugfix on 0.0.6.
12499 o Minor bugfixes (correctness):
12500 - Remove a nonworking, unnecessary check to see whether a circuit
12501 hop's identity digest was set when the circuit failed. Fixes bug
12502 24927; bugfix on 0.2.4.4-alpha.
12504 o Minor bugfixes (logging):
12505 - Don't treat inability to store a cached consensus object as a bug:
12506 it can happen normally when we are out of disk space. Fixes bug
12507 24859; bugfix on 0.3.1.1-alpha.
12508 - Fix a (mostly harmless) race condition when invoking
12509 LOG_PROTOCOL_WARN message from a subthread while the torrc options
12510 are changing. Fixes bug 23954; bugfix on 0.1.1.9-alpha.
12512 o Minor bugfixes (onion services):
12513 - Remove a BUG() statement when a client fetches an onion descriptor
12514 that has a lower revision counter than the one in its cache. This
12515 can happen in normal circumstances due to HSDir desync. Fixes bug
12516 24976; bugfix on 0.3.2.1-alpha.
12517 - If we are configured to offer a single onion service, don't log
12518 long-term established one hop rendezvous points in the heartbeat.
12519 Fixes bug 25116; bugfix on 0.2.9.6-rc.
12521 o Minor bugfixes (performance):
12522 - Avoid calling protocol_list_supports_protocol() from inside tight
12523 loops when running with cached routerinfo_t objects. Instead,
12524 summarize the relevant protocols as flags in the routerinfo_t, as
12525 we do for routerstatus_t objects. This change simplifies our code
12526 a little, and saves a large amount of short-term memory allocation
12527 operations. Fixes bug 25008; bugfix on 0.2.9.4-alpha.
12529 o Minor bugfixes (Rust FFI):
12530 - Fix a minor memory leak which would happen whenever the C code
12531 would call the Rust implementation of
12532 protover_get_supported_protocols(). This was due to the C version
12533 returning a static string, whereas the Rust version newly allocated
12534 a CString to pass across the FFI boundary. Consequently, the C
12535 code was not expecting to need to free() what it was given. Fixes
12536 bug 25127; bugfix on 0.3.2.1-alpha.
12538 o Minor bugfixes (scheduler, KIST):
12539 - Avoid adding the same channel twice in the KIST scheduler pending
12540 list, which would waste CPU cycles. Fixes bug 24700; bugfix
12543 o Minor bugfixes (unit test, monotonic time):
12544 - Increase a constant (1msec to 10msec) in the monotonic time test
12545 that makes sure the nsec/usec/msec times read are synchronized.
12546 This change was needed to accommodate slow systems like armel or
12547 when the clock_gettime() is not a VDSO on the running kernel.
12548 Fixes bug 25113; bugfix on 0.2.9.1.
12550 o Minor bugfixes (v3 onion services):
12551 - Look at the "HSRend" protocol version, not the "HSDir" protocol
12552 version, when deciding whether a consensus entry can support the
12553 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
12554 bugfix on 0.3.2.1-alpha.
12556 o Code simplification and refactoring:
12557 - Remove the unused nodelist_recompute_all_hsdir_indices(). Closes
12559 - Remove a series of counters used to track circuit extend attempts
12560 and connection status but that in reality we aren't using for
12561 anything other than stats logged by a SIGUSR1 signal. Closes
12564 o Documentation (man page):
12565 - The HiddenServiceVersion torrc option accepts only one number:
12566 either version 2 or 3. Closes ticket 25026; bugfix
12570 Changes in version 0.3.3.1-alpha - 2018-01-25
12571 Tor 0.3.3.1-alpha is the first release in the 0.3.3.x series. It adds
12572 several new features to Tor, including several improvements to
12573 bootstrapping, and support for an experimental "vanguards" feature to
12574 resist guard discovery attacks. This series also includes better
12575 support for applications that need to embed Tor or manage v3
12578 o Major features (embedding):
12579 - There is now a documented stable API for programs that need to
12580 embed Tor. See tor_api.h for full documentation and known bugs.
12581 Closes ticket 23684.
12582 - Tor now has support for restarting in the same process.
12583 Controllers that run Tor using the "tor_api.h" interface can now
12584 restart Tor after Tor has exited. This support is incomplete,
12585 however: we fixed crash bugs that prevented it from working at
12586 all, but many bugs probably remain, including a possibility of
12587 security issues. Implements ticket 24581.
12589 o Major features (IPv6, directory documents):
12590 - Add consensus method 27, which adds IPv6 ORPorts to the microdesc
12591 consensus. This information makes it easier for IPv6 clients to
12592 bootstrap and choose reachable entry guards. Implements ticket 23826.
12593 - Add consensus method 28, which removes IPv6 ORPorts from
12594 microdescriptors. Now that the consensus contains IPv6 ORPorts, they
12595 are redundant in microdescs. This change will be used by Tor clients
12596 on 0.2.8.x and later. (That is to say, with all Tor clients that
12597 have IPv6 bootstrap and guard support.) Implements ticket 23828.
12598 - Expand the documentation for AuthDirHasIPv6Connectivity when it is
12599 set by different numbers of authorities. Fixes 23870
12602 o Major features (onion service v3, control port):
12603 - The control port now supports commands and events for v3 onion
12604 services. It is now possible to create ephemeral v3 services using
12605 ADD_ONION. Additionally, several events (HS_DESC, HS_DESC_CONTENT,
12606 CIRC and CIRC_MINOR) and commands (GETINFO, HSPOST, ADD_ONION and
12607 DEL_ONION) have been extended to support v3 onion services. Closes
12608 ticket 20699; implements proposal 284.
12610 o Major features (onion services):
12611 - Provide torrc options to pin the second and third hops of onion
12612 service circuits to a list of nodes. The option HSLayer2Guards
12613 pins the second hop, and the option HSLayer3Guards pins the third
12614 hop. These options are for use in conjunction with experiments
12615 with "vanguards" for preventing guard enumeration attacks. Closes
12618 o Major features (rust, portability, experimental):
12619 - Tor now ships with an optional implementation of one of its
12620 smaller modules (protover.c) in the Rust programming language. To
12621 try it out, install a Rust build environment, and configure Tor
12622 with "--enable-rust --enable-cargo-online-mode". This should not
12623 cause any user-visible changes, but should help us gain more
12624 experience with Rust, and plan future Rust integration work.
12625 Implementation by Chelsea Komlo. Closes ticket 22840.
12627 o Minor features (storage, configuration):
12628 - Users can store cached directory documents somewhere other than
12629 the DataDirectory by using the CacheDirectory option. Similarly,
12630 the storage location for relay's keys can be overridden with the
12631 KeyDirectory option. Closes ticket 22703.
12633 o Major features (v3 onion services, ipv6):
12634 - When v3 onion service clients send introduce cells, they now
12635 include the IPv6 address of the rendezvous point, if it has one.
12636 Current v3 onion services running 0.3.2 ignore IPv6 addresses, but
12637 in future Tor versions, IPv6-only v3 single onion services will be
12638 able to use IPv6 addresses to connect directly to the rendezvous
12639 point. Closes ticket 23577. Patch by Neel Chauhan.
12641 o Major bugfixes (onion services, retry behavior):
12642 - Fix an "off by 2" error in counting rendezvous failures on the
12643 onion service side. While we thought we would stop the rendezvous
12644 attempt after one failed circuit, we were actually making three
12645 circuit attempts before giving up. Now switch to a default of 2,
12646 and allow the consensus parameter "hs_service_max_rdv_failures" to
12647 override. Fixes bug 24895; bugfix on 0.0.6.
12648 - New-style (v3) onion services now obey the "max rendezvous circuit
12649 attempts" logic. Previously they would make as many rendezvous
12650 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
12651 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
12653 o Major bugfixes (relays):
12654 - Fix a set of false positives where relays would consider
12655 connections to other relays as being client-only connections (and
12656 thus e.g. deserving different link padding schemes) if those
12657 relays fell out of the consensus briefly. Now we look only at the
12658 initial handshake and whether the connection authenticated as a
12659 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
12661 o Minor feature (IPv6):
12662 - Make IPv6-only clients wait for microdescs for relays, even if we
12663 were previously using descriptors (or were using them as a bridge)
12664 and have a cached descriptor for them. Implements ticket 23827.
12665 - When a consensus has IPv6 ORPorts, make IPv6-only clients use
12666 them, rather than waiting to download microdescriptors.
12667 Implements ticket 23827.
12669 o Minor features (cleanup):
12670 - Tor now deletes the CookieAuthFile and ExtORPortCookieAuthFile
12671 when it stops. Closes ticket 23271.
12673 o Minor features (defensive programming):
12674 - Most of the functions in Tor that free objects have been replaced
12675 with macros that free the objects and set the corresponding
12676 pointers to NULL. This change should help prevent a large class of
12677 dangling pointer bugs. Closes ticket 24337.
12678 - Where possible, the tor_free() macro now only evaluates its input
12679 once. Part of ticket 24337.
12680 - Check that microdesc ed25519 ids are non-zero in
12681 node_get_ed25519_id() before returning them. Implements ticket
12682 24001, patch by "aruna1234".
12684 o Minor features (embedding):
12685 - Tor can now start with a preauthenticated control connection
12686 created by the process that launched it. This feature is meant for
12687 use by programs that want to launch and manage a Tor process
12688 without allowing other programs to manage it as well. For more
12689 information, see the __OwningControllerFD option documented in
12690 control-spec.txt. Closes ticket 23900.
12691 - On most errors that would cause Tor to exit, it now tries to
12692 return from the tor_main() function, rather than calling the
12693 system exit() function. Most users won't notice a difference here,
12694 but it should be significant for programs that run Tor inside
12695 a separate thread: they should now be able to survive Tor's exit
12696 conditions rather than having Tor shut down the entire process.
12697 Closes ticket 23848.
12698 - Applications that want to embed Tor can now tell Tor not to
12699 register any of its own POSIX signal handlers, using the
12700 __DisableSignalHandlers option. Closes ticket 24588.
12702 o Minor features (fallback directory list):
12703 - Avoid selecting fallbacks that change their IP addresses too
12704 often. Select more fallbacks by ignoring the Guard flag, and
12705 allowing lower cutoffs for the Running and V2Dir flags. Also allow
12706 a lower bandwidth, and a higher number of fallbacks per operator
12707 (5% of the list). Implements ticket 24785.
12708 - Update the fallback whitelist and blacklist based on opt-ins and
12709 relay changes. Closes tickets 22321, 24678, 22527, 24135,
12712 o Minor features (fallback directory mirror configuration):
12713 - Add a nickname to each fallback in a C comment. This makes it
12714 easier for operators to find their relays, and allows stem to use
12715 nicknames to identify fallbacks. Implements ticket 24600.
12716 - Add a type and version header to the fallback directory mirror
12717 file. Also add a delimiter to the end of each fallback entry. This
12718 helps external parsers like stem and Relay Search. Implements
12720 - Add an extrainfo cache flag for each fallback in a C comment. This
12721 allows stem to use fallbacks to fetch extra-info documents, rather
12722 than using authorities. Implements ticket 22759.
12723 - Add the generateFallbackDirLine.py script for automatically
12724 generating fallback directory mirror lines from relay fingerprints.
12725 No more typos! Add the lookupFallbackDirContact.py script for
12726 automatically looking up operator contact info from relay
12727 fingerprints. Implements ticket 24706, patch by teor and atagar.
12728 - Reject any fallback directory mirror that serves an expired
12729 consensus. Implements ticket 20942, patch by "minik".
12730 - Remove commas and equals signs from external string inputs to the
12731 fallback list. This avoids format confusion attacks. Implements
12733 - Remove the "weight=10" line from fallback directory mirror
12734 entries. Ticket 24681 will maintain the current fallback weights
12735 by changing Tor's default fallback weight to 10. Implements
12737 - Stop logging excessive information about fallback netblocks.
12738 Implements ticket 24791.
12740 o Minor features (forward-compatibility):
12741 - If a relay supports some link authentication protocol that we do
12742 not recognize, then include that relay's ed25519 key when telling
12743 other relays to extend to it. Previously, we treated future
12744 versions as if they were too old to support ed25519 link
12745 authentication. Closes ticket 20895.
12747 o Minor features (heartbeat):
12748 - Add onion service information to our heartbeat logs, displaying
12749 stats about the activity of configured onion services. Closes
12752 o Minor features (instrumentation, development):
12753 - Add the MainloopStats option to allow developers to get
12754 instrumentation information from the main event loop via the
12755 heartbeat messages. We hope to use this to improve Tor's behavior
12756 when it's trying to sleep. Closes ticket 24605.
12758 o Minor features (log messages):
12759 - Improve a warning message that happens when we fail to re-parse an
12760 old router because of an expired certificate. Closes ticket 20020.
12761 - Make the log more quantitative when we hit MaxMemInQueues
12762 threshold exposing some values. Closes ticket 24501.
12764 o Minor features (logging, android):
12765 - Added support for the Android logging subsystem. Closes
12768 o Minor features (performance):
12769 - Support predictive circuit building for onion service circuits
12770 with multiple layers of guards. Closes ticket 23101.
12771 - Use stdatomic.h where available, rather than mutexes, to implement
12772 atomic_counter_t. Closes ticket 23953.
12774 o Minor features (performance, 32-bit):
12775 - Improve performance on 32-bit systems by avoiding 64-bit division
12776 when calculating the timestamp in milliseconds for channel padding
12777 computations. Implements ticket 24613.
12778 - Improve performance on 32-bit systems by avoiding 64-bit division
12779 when timestamping cells and buffer chunks for OOM calculations.
12780 Implements ticket 24374.
12782 o Minor features (performance, OSX, iOS):
12783 - Use the mach_approximate_time() function (when available) to
12784 implement coarse monotonic time. Having a coarse time function
12785 should avoid a large number of system calls, and improve
12786 performance slightly, especially under load. Closes ticket 24427.
12788 o Minor features (performance, windows):
12789 - Improve performance on Windows Vista and Windows 7 by adjusting
12790 TCP send window size according to the recommendation from
12791 SIO_IDEAL_SEND_BACKLOG_QUERY. Closes ticket 22798. Patch
12794 o Major features (relay):
12795 - Implement an option, ReducedExitPolicy, to allow an Tor exit relay
12796 operator to use a more reasonable ("reduced") exit policy, rather
12797 than the default one. If you want to run an exit node without
12798 thinking too hard about which ports to allow, this one is for you.
12799 Closes ticket 13605. Patch from Neel Chauhan.
12801 o Minor features (testing, debugging, embedding):
12802 - For development purposes, Tor now has a mode in which it runs for
12803 a few seconds, then stops, and starts again without exiting the
12804 process. This mode is meant to help us debug various issues with
12805 ticket 23847. To use this feature, compile with
12806 --enable-restart-debugging, and set the TOR_DEBUG_RESTART
12807 environment variable. This is expected to crash a lot, and is
12808 really meant for developers only. It will likely be removed in a
12809 future release. Implements ticket 24583.
12811 o Minor bugfix (network IPv6 test):
12812 - Tor's test scripts now check if "ping -6 ::1" works when the user
12813 runs "make test-network-all". Fixes bug 24677; bugfix on
12814 0.2.9.3-alpha. Patch by "ffmancera".
12816 o Minor bugfixes (build, rust):
12817 - Fix output of autoconf checks to display success messages for Rust
12818 dependencies and a suitable rustc compiler version. Fixes bug
12819 24612; bugfix on 0.3.1.3-alpha.
12820 - When building with Rust on OSX, link against libresolv, to work
12821 around the issue at https://github.com/rust-lang/rust/issues/46797.
12822 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
12823 - Don't pass the --quiet option to cargo: it seems to suppress some
12824 errors, which is not what we want to do when building. Fixes bug
12825 24518; bugfix on 0.3.1.7.
12826 - Build correctly when building from outside Tor's source tree with
12827 the TOR_RUST_DEPENDENCIES option set. Fixes bug 22768; bugfix
12830 o Minor bugfixes (directory authorities, IPv6):
12831 - When creating a routerstatus (vote) from a routerinfo (descriptor),
12832 set the IPv6 address to the unspecified IPv6 address, and
12833 explicitly initialize the port to zero. Fixes bug 24488; bugfix
12836 o Minor bugfixes (fallback directory mirrors):
12837 - Make updateFallbackDirs.py search harder for python. (Some OSs
12838 don't put it in /usr/bin.) Fixes bug 24708; bugfix
12841 o Minor bugfixes (hibernation, bandwidth accounting, shutdown):
12842 - When hibernating, close connections normally and allow them to
12843 flush. Fixes bug 23571; bugfix on 0.2.4.7-alpha. Also fixes
12845 - Do not attempt to launch self-reachability tests when entering
12846 hibernation. Fixes a case of bug 12062; bugfix on 0.0.9pre5.
12847 - Resolve several bugs related to descriptor fetching on bridge
12848 clients with bandwidth accounting enabled. (This combination is
12849 not recommended!) Fixes a case of bug 12062; bugfix
12851 - When hibernating, do not attempt to launch DNS checks. Fixes a
12852 case of bug 12062; bugfix on 0.1.2.2-alpha.
12853 - When hibernating, do not try to upload or download descriptors.
12854 Fixes a case of bug 12062; bugfix on 0.0.9pre5.
12856 o Minor bugfixes (IPv6, bridges):
12857 - Tor now always sets IPv6 preferences for bridges. Fixes bug 24573;
12858 bugfix on 0.2.8.2-alpha.
12859 - Tor now sets IPv6 address in the routerstatus as well as in the
12860 router descriptors when updating addresses for a bridge. Closes
12861 ticket 24572; bugfix on 0.2.4.5-alpha. Patch by "ffmancera".
12863 o Minor bugfixes (linux seccomp2 sandbox):
12864 - When running with the sandbox enabled, reload configuration files
12865 correctly even when %include was used. Previously we would crash.
12866 Fixes bug 22605; bugfix on 0.3.1. Patch from Daniel Pinto.
12868 o Minor bugfixes (memory leaks):
12869 - Avoid possible at-exit memory leaks related to use of Libevent's
12870 event_base_once() function. (This function tends to leak memory if
12871 the event_base is closed before the event fires.) Fixes bug 24584;
12872 bugfix on 0.2.8.1-alpha.
12873 - Fix a harmless memory leak in tor-resolve. Fixes bug 24582; bugfix
12876 o Minor bugfixes (OSX):
12877 - Don't exit the Tor process if setrlimit() fails to change the file
12878 limit (which can happen sometimes on some versions of OSX). Fixes
12879 bug 21074; bugfix on 0.0.9pre5.
12881 o Minor bugfixes (performance, fragile-hardening):
12882 - Improve the performance of our consensus-diff application code
12883 when Tor is built with the --enable-fragile-hardening option set.
12884 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
12886 o Minor bugfixes (performance, timeouts):
12887 - Consider circuits for timeout as soon as they complete a hop. This
12888 is more accurate than applying the timeout in
12889 circuit_expire_building() because that function is only called
12890 once per second, which is now too slow for typical timeouts on the
12891 current network. Fixes bug 23114; bugfix on 0.2.2.2-alpha.
12892 - Use onion service circuits (and other circuits longer than 3 hops)
12893 to calculate a circuit build timeout. Previously, Tor only
12894 calculated its build timeout based on circuits that planned to be
12895 exactly 3 hops long. With this change, we include measurements
12896 from all circuits at the point where they complete their third
12897 hop. Fixes bug 23100; bugfix on 0.2.2.2-alpha.
12899 o Minor bugfixes (testing):
12900 - Give out Exit flags in bootstrapping networks. Fixes bug 24137;
12901 bugfix on 0.2.3.1-alpha.
12902 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
12903 25005; bugfix on 0.3.2.7-rc.
12905 o Code simplification and refactoring:
12906 - Remove /usr/athena from search path in configure.ac. Closes
12908 - Remove duplicate code in node_has_curve25519_onion_key() and
12909 node_get_curve25519_onion_key(), and add a check for a zero
12910 microdesc curve25519 onion key. Closes ticket 23966, patch by
12911 "aruna1234" and teor.
12912 - Rewrite channel_rsa_id_group_set_badness to reduce temporary
12913 memory allocations with large numbers of OR connections (e.g.
12914 relays). Closes ticket 24119.
12915 - Separate the function that deletes ephemeral files when Tor
12917 - Small changes to Tor's buf_t API to make it suitable for use as a
12918 general-purpose safe string constructor. Closes ticket 22342.
12919 - Switch -Wnormalized=id to -Wnormalized=nfkc in configure.ac to
12920 avoid source code identifier confusion. Closes ticket 24467.
12921 - The tor_git_revision[] constant no longer needs to be redeclared
12922 by everything that links against the rest of Tor. Done as part of
12923 ticket 23845, to simplify our external API.
12924 - We make extend_info_from_node() use node_get_curve25519_onion_key()
12925 introduced in ticket 23577 to access the curve25519 public keys
12926 rather than accessing it directly. Closes ticket 23760. Patch by
12928 - Add a function to log channels' scheduler state changes to aid
12929 debugging efforts. Closes ticket 24531.
12932 - Add documentation on how to build tor with Rust dependencies
12933 without having to be online. Closes ticket 22907; bugfix
12935 - Clarify the behavior of RelayBandwidth{Rate,Burst} with client
12936 traffic. Closes ticket 24318.
12937 - Document that OutboundBindAddress doesn't apply to DNS requests.
12938 Closes ticket 22145. Patch from Aruna Maurya.
12939 - Document that operators who run more than one relay or bridge are
12940 expected to set MyFamily and ContactInfo correctly. Closes
12943 o Code simplification and refactoring (channels):
12944 - Remove the incoming and outgoing channel queues. These were never
12945 used, but still took up a step in our fast path.
12946 - The majority of the channel unit tests have been rewritten and the
12947 code coverage has now been raised to 83.6% for channel.c. Closes
12949 - Remove other dead code from the channel subsystem: All together,
12950 this cleanup has removed more than 1500 lines of code overall and
12951 adding very little except for unit test.
12953 o Code simplification and refactoring (circuit rendezvous):
12954 - Split the client-side rendezvous circuit lookup into two
12955 functions: one that returns only established circuits and another
12956 that returns all kinds of circuits. Closes ticket 23459.
12958 o Code simplification and refactoring (controller):
12959 - Make most of the variables in networkstatus_getinfo_by_purpose()
12960 const. Implements ticket 24489.
12963 Changes in version 0.3.2.9 - 2018-01-09
12964 Tor 0.3.2.9 is the first stable release in the 0.3.2 series.
12966 The 0.3.2 series includes our long-anticipated new onion service
12967 design, with numerous security features. (For more information, see
12968 our blog post at https://blog.torproject.org/fall-harvest.) We also
12969 have a new circuit scheduler algorithm for improved performance on
12970 relays everywhere (see https://blog.torproject.org/kist-and-tell),
12971 along with many smaller features and bugfixes.
12973 Per our stable release policy, we plan to support each stable release
12974 series for at least the next nine months, or for three months after
12975 the first stable release of the next series: whichever is longer. If
12976 you need a release with long-term support, we recommend that you stay
12977 with the 0.2.9 series.
12979 Below is a list of the changes since 0.3.2.8-rc. For a list of all
12980 changes since 0.3.1, see the ReleaseNotes file.
12982 o Minor features (fallback directory mirrors):
12983 - The fallback directory list has been re-generated based on the
12984 current status of the network. Tor uses fallback directories to
12985 bootstrap when it doesn't yet have up-to-date directory
12986 information. Closes ticket 24801.
12987 - Make the default DirAuthorityFallbackRate 0.1, so that clients
12988 prefer to bootstrap from fallback directory mirrors. This is a
12989 follow-up to 24679, which removed weights from the default
12990 fallbacks. Implements ticket 24681.
12992 o Minor features (geoip):
12993 - Update geoip and geoip6 to the January 5 2018 Maxmind GeoLite2
12996 o Minor bugfixes (address selection):
12997 - When the fascist_firewall_choose_address_ functions don't find a
12998 reachable address, set the returned address to the null address
12999 and port. This is a precautionary measure, because some callers do
13000 not check the return value. Fixes bug 24736; bugfix
13003 o Minor bugfixes (compilation):
13004 - Resolve a few shadowed-variable warnings in the onion service
13005 code. Fixes bug 24634; bugfix on 0.3.2.1-alpha.
13007 o Minor bugfixes (portability, msvc):
13008 - Fix a bug in the bit-counting parts of our timing-wheel code on
13009 MSVC. (Note that MSVC is still not a supported build platform, due
13010 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
13014 Changes in version 0.3.2.8-rc - 2017-12-21
13015 Tor 0.3.2.8-rc fixes a pair of bugs in the KIST and KISTLite
13016 schedulers that had led servers under heavy load to overload their
13017 outgoing connections. All relay operators running earlier 0.3.2.x
13018 versions should upgrade. This version also includes a mitigation for
13019 over-full DESTROY queues leading to out-of-memory conditions: if it
13020 works, we will soon backport it to earlier release series.
13022 This is the second release candidate in the 0.3.2 series. If we find
13023 no new bugs or regression here, then the first stable 0.3.2 release
13024 will be nearly identical to this.
13026 o Major bugfixes (KIST, scheduler):
13027 - The KIST scheduler did not correctly account for data already
13028 enqueued in each connection's send socket buffer, particularly in
13029 cases when the TCP/IP congestion window was reduced between
13030 scheduler calls. This situation lead to excessive per-connection
13031 buffering in the kernel, and a potential memory DoS. Fixes bug
13032 24665; bugfix on 0.3.2.1-alpha.
13034 o Minor features (geoip):
13035 - Update geoip and geoip6 to the December 6 2017 Maxmind GeoLite2
13038 o Minor bugfixes (hidden service v3):
13039 - Bump hsdir_spread_store parameter from 3 to 4 in order to increase
13040 the probability of reaching a service for a client missing
13041 microdescriptors. Fixes bug 24425; bugfix on 0.3.2.1-alpha.
13043 o Minor bugfixes (memory usage):
13044 - When queuing DESTROY cells on a channel, only queue the circuit-id
13045 and reason fields: not the entire 514-byte cell. This fix should
13046 help mitigate any bugs or attacks that fill up these queues, and
13047 free more RAM for other uses. Fixes bug 24666; bugfix
13050 o Minor bugfixes (scheduler, KIST):
13051 - Use a sane write limit for KISTLite when writing onto a connection
13052 buffer instead of using INT_MAX and shoving as much as it can.
13053 Because the OOM handler cleans up circuit queues, we are better
13054 off at keeping them in that queue instead of the connection's
13055 buffer. Fixes bug 24671; bugfix on 0.3.2.1-alpha.
13058 Changes in version 0.3.2.7-rc - 2017-12-14
13059 Tor 0.3.2.7-rc fixes various bugs in earlier versions of Tor,
13060 including some that could affect reliability or correctness.
13062 This is the first release candidate in the 0.3.2 series. If we find no
13063 new bugs or regression here, then the first stable 0.3.2. release will
13064 be nearly identical to this.
13066 o Major bugfixes (circuit prediction):
13067 - Fix circuit prediction logic so that a client doesn't treat a port
13068 as being "handled" by a circuit if that circuit already has
13069 isolation settings on it. This change should make Tor clients more
13070 responsive by improving their chances of having a pre-created
13071 circuit ready for use when a request arrives. Fixes bug 18859;
13072 bugfix on 0.2.3.3-alpha.
13074 o Minor features (logging):
13075 - Provide better warnings when the getrandom() syscall fails. Closes
13078 o Minor features (portability):
13079 - Tor now compiles correctly on arm64 with libseccomp-dev installed.
13080 (It doesn't yet work with the sandbox enabled.) Closes
13083 o Minor bugfixes (bridge clients, bootstrap):
13084 - Retry directory downloads when we get our first bridge descriptor
13085 during bootstrap or while reconnecting to the network. Keep
13086 retrying every time we get a bridge descriptor, until we have a
13087 reachable bridge. Fixes part of bug 24367; bugfix on 0.2.0.3-alpha.
13088 - Stop delaying bridge descriptor fetches when we have cached bridge
13089 descriptors. Instead, only delay bridge descriptor fetches when we
13090 have at least one reachable bridge. Fixes part of bug 24367;
13091 bugfix on 0.2.0.3-alpha.
13092 - Stop delaying directory fetches when we have cached bridge
13093 descriptors. Instead, only delay bridge descriptor fetches when
13094 all our bridges are definitely unreachable. Fixes part of bug
13095 24367; bugfix on 0.2.0.3-alpha.
13097 o Minor bugfixes (compilation):
13098 - Fix a signed/unsigned comparison warning introduced by our fix to
13099 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
13101 o Minor bugfixes (correctness):
13102 - Fix several places in our codebase where a C compiler would be
13103 likely to eliminate a check, based on assuming that undefined
13104 behavior had not happened elsewhere in the code. These cases are
13105 usually a sign of redundant checking or dubious arithmetic. Found
13106 by Georg Koppen using the "STACK" tool from Wang, Zeldovich,
13107 Kaashoek, and Solar-Lezama. Fixes bug 24423; bugfix on various
13110 o Minor bugfixes (onion service v3):
13111 - Fix a race where an onion service would launch a new intro circuit
13112 after closing an old one, but fail to register it before freeing
13113 the previously closed circuit. This bug was making the service
13114 unable to find the established intro circuit and thus not upload
13115 its descriptor, thus making a service unavailable for up to 24
13116 hours. Fixes bug 23603; bugfix on 0.3.2.1-alpha.
13118 o Minor bugfixes (scheduler, KIST):
13119 - Properly set the scheduler state of an unopened channel in the
13120 KIST scheduler main loop. This prevents a harmless but annoying
13121 log warning. Fixes bug 24502; bugfix on 0.3.2.4-alpha.
13122 - Avoid a possible integer overflow when computing the available
13123 space on the TCP buffer of a channel. This had no security
13124 implications; but could make KIST allow too many cells on a
13125 saturated connection. Fixes bug 24590; bugfix on 0.3.2.1-alpha.
13126 - Downgrade to "info" a harmless warning about the monotonic time
13127 moving backwards: This can happen on platform not supporting
13128 monotonic time. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
13131 Changes in version 0.3.2.6-alpha - 2017-12-01
13132 This version of Tor is the latest in the 0.3.2 alpha series. It
13133 includes fixes for several important security issues. All Tor users
13134 should upgrade to this release, or to one of the other releases coming
13137 o Major bugfixes (security):
13138 - Fix a denial of service bug where an attacker could use a
13139 malformed directory object to cause a Tor instance to pause while
13140 OpenSSL would try to read a passphrase from the terminal. (Tor
13141 instances run without a terminal, which is the case for most Tor
13142 packages, are not impacted.) Fixes bug 24246; bugfix on every
13143 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13144 Found by OSS-Fuzz as testcase 6360145429790720.
13145 - Fix a denial of service issue where an attacker could crash a
13146 directory authority using a malformed router descriptor. Fixes bug
13147 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13149 - When checking for replays in the INTRODUCE1 cell data for a
13150 (legacy) onion service, correctly detect replays in the RSA-
13151 encrypted part of the cell. We were previously checking for
13152 replays on the entire cell, but those can be circumvented due to
13153 the malleability of Tor's legacy hybrid encryption. This fix helps
13154 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13155 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13158 o Major bugfixes (security, onion service v2):
13159 - Fix a use-after-free error that could crash v2 Tor onion services
13160 when they failed to open circuits while expiring introduction
13161 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13162 also tracked as TROVE-2017-013 and CVE-2017-8823.
13164 o Major bugfixes (security, relay):
13165 - When running as a relay, make sure that we never build a path
13166 through ourselves, even in the case where we have somehow lost the
13167 version of our descriptor appearing in the consensus. Fixes part
13168 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13169 as TROVE-2017-012 and CVE-2017-8822.
13170 - When running as a relay, make sure that we never choose ourselves
13171 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
13172 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
13174 o Minor feature (relay statistics):
13175 - Change relay bandwidth reporting stats interval from 4 hours to 24
13176 hours in order to reduce the efficiency of guard discovery
13177 attacks. Fixes ticket 23856.
13179 o Minor features (directory authority):
13180 - Add an IPv6 address for the "bastet" directory authority. Closes
13183 o Minor bugfixes (client):
13184 - By default, do not enable storage of client-side DNS values. These
13185 values were unused by default previously, but they should not have
13186 been cached at all. Fixes bug 24050; bugfix on 0.2.6.3-alpha.
13189 Changes in version 0.3.1.9 - 2017-12-01:
13190 Tor 0.3.1.9 backports important security and stability fixes from the
13191 0.3.2 development series. All Tor users should upgrade to this
13192 release, or to another of the releases coming out today.
13194 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13195 - Fix a denial of service bug where an attacker could use a
13196 malformed directory object to cause a Tor instance to pause while
13197 OpenSSL would try to read a passphrase from the terminal. (Tor
13198 instances run without a terminal, which is the case for most Tor
13199 packages, are not impacted.) Fixes bug 24246; bugfix on every
13200 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13201 Found by OSS-Fuzz as testcase 6360145429790720.
13202 - Fix a denial of service issue where an attacker could crash a
13203 directory authority using a malformed router descriptor. Fixes bug
13204 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13206 - When checking for replays in the INTRODUCE1 cell data for a
13207 (legacy) onion service, correctly detect replays in the RSA-
13208 encrypted part of the cell. We were previously checking for
13209 replays on the entire cell, but those can be circumvented due to
13210 the malleability of Tor's legacy hybrid encryption. This fix helps
13211 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13212 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13215 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13216 - Fix a use-after-free error that could crash v2 Tor onion services
13217 when they failed to open circuits while expiring introduction
13218 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13219 also tracked as TROVE-2017-013 and CVE-2017-8823.
13221 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13222 - When running as a relay, make sure that we never build a path
13223 through ourselves, even in the case where we have somehow lost the
13224 version of our descriptor appearing in the consensus. Fixes part
13225 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13226 as TROVE-2017-012 and CVE-2017-8822.
13227 - When running as a relay, make sure that we never choose ourselves
13228 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
13229 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
13231 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
13232 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13233 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13234 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13235 identifying and finding a workaround to this bug and to Moritz,
13236 Arthur Edelstein, and Roger for helping to track it down and
13239 o Minor features (bridge):
13240 - Bridges now include notice in their descriptors that they are
13241 bridges, and notice of their distribution status, based on their
13242 publication settings. Implements ticket 18329. For more fine-
13243 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13246 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13247 - Add an IPv6 address for the "bastet" directory authority. Closes
13250 o Minor features (geoip):
13251 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13254 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
13255 - Avoid unnecessary calls to directory_fetches_from_authorities() on
13256 relays, to prevent spurious address resolutions and descriptor
13257 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13258 bugfix on in 0.2.8.1-alpha.
13260 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
13261 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
13262 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13264 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
13265 - When a circuit is marked for close, do not attempt to package any
13266 cells for channels on that circuit. Previously, we would detect
13267 this condition lower in the call stack, when we noticed that the
13268 circuit had no attached channel, and log an annoying message.
13269 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13271 o Minor bugfixes (onion service, backport from 0.3.2.5-alpha):
13272 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
13273 so it matches dir-spec.txt. Fixes bug 24262; bugfix
13276 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
13277 - Avoid a crash when transitioning from client mode to bridge mode.
13278 Previously, we would launch the worker threads whenever our
13279 "public server" mode changed, but not when our "server" mode
13280 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13283 Changes in version 0.3.0.13 - 2017-12-01
13284 Tor 0.3.0.13 backports important security and stability bugfixes from
13285 later Tor releases. All Tor users should upgrade to this release, or
13286 to another of the releases coming out today.
13288 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
13289 2018. If you need a release with long-term support, please stick with
13290 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13292 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13293 - Fix a denial of service bug where an attacker could use a
13294 malformed directory object to cause a Tor instance to pause while
13295 OpenSSL would try to read a passphrase from the terminal. (Tor
13296 instances run without a terminal, which is the case for most Tor
13297 packages, are not impacted.) Fixes bug 24246; bugfix on every
13298 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13299 Found by OSS-Fuzz as testcase 6360145429790720.
13300 - Fix a denial of service issue where an attacker could crash a
13301 directory authority using a malformed router descriptor. Fixes bug
13302 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13304 - When checking for replays in the INTRODUCE1 cell data for a
13305 (legacy) onion service, correctly detect replays in the RSA-
13306 encrypted part of the cell. We were previously checking for
13307 replays on the entire cell, but those can be circumvented due to
13308 the malleability of Tor's legacy hybrid encryption. This fix helps
13309 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13310 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13313 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13314 - Fix a use-after-free error that could crash v2 Tor onion services
13315 when they failed to open circuits while expiring introduction
13316 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13317 also tracked as TROVE-2017-013 and CVE-2017-8823.
13319 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13320 - When running as a relay, make sure that we never build a path
13321 through ourselves, even in the case where we have somehow lost the
13322 version of our descriptor appearing in the consensus. Fixes part
13323 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13324 as TROVE-2017-012 and CVE-2017-8822.
13325 - When running as a relay, make sure that we never choose ourselves
13326 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
13327 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
13329 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
13330 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13331 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13332 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13333 identifying and finding a workaround to this bug and to Moritz,
13334 Arthur Edelstein, and Roger for helping to track it down and
13337 o Minor features (security, windows, backport from 0.3.1.1-alpha):
13338 - Enable a couple of pieces of Windows hardening: one
13339 (HeapEnableTerminationOnCorruption) that has been on-by-default
13340 since Windows 8, and unavailable before Windows 7; and one
13341 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
13342 affect us, but shouldn't do any harm. Closes ticket 21953.
13344 o Minor features (bridge, backport from 0.3.1.9):
13345 - Bridges now include notice in their descriptors that they are
13346 bridges, and notice of their distribution status, based on their
13347 publication settings. Implements ticket 18329. For more fine-
13348 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13351 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13352 - Add an IPv6 address for the "bastet" directory authority. Closes
13355 o Minor features (geoip):
13356 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13359 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
13360 - Avoid unnecessary calls to directory_fetches_from_authorities() on
13361 relays, to prevent spurious address resolutions and descriptor
13362 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13363 bugfix on in 0.2.8.1-alpha.
13365 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
13366 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
13367 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13369 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
13370 - When a circuit is marked for close, do not attempt to package any
13371 cells for channels on that circuit. Previously, we would detect
13372 this condition lower in the call stack, when we noticed that the
13373 circuit had no attached channel, and log an annoying message.
13374 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13376 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
13377 - Avoid a crash when transitioning from client mode to bridge mode.
13378 Previously, we would launch the worker threads whenever our
13379 "public server" mode changed, but not when our "server" mode
13380 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13382 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
13383 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13384 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13387 Changes in version 0.2.9.14 - 2017-12-01
13388 Tor 0.3.0.13 backports important security and stability bugfixes from
13389 later Tor releases. All Tor users should upgrade to this release, or
13390 to another of the releases coming out today.
13392 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
13393 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13394 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13395 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13396 identifying and finding a workaround to this bug and to Moritz,
13397 Arthur Edelstein, and Roger for helping to track it down and
13400 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13401 - Fix a denial of service bug where an attacker could use a
13402 malformed directory object to cause a Tor instance to pause while
13403 OpenSSL would try to read a passphrase from the terminal. (Tor
13404 instances run without a terminal, which is the case for most Tor
13405 packages, are not impacted.) Fixes bug 24246; bugfix on every
13406 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13407 Found by OSS-Fuzz as testcase 6360145429790720.
13408 - Fix a denial of service issue where an attacker could crash a
13409 directory authority using a malformed router descriptor. Fixes bug
13410 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13412 - When checking for replays in the INTRODUCE1 cell data for a
13413 (legacy) onion service, correctly detect replays in the RSA-
13414 encrypted part of the cell. We were previously checking for
13415 replays on the entire cell, but those can be circumvented due to
13416 the malleability of Tor's legacy hybrid encryption. This fix helps
13417 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13418 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13421 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13422 - Fix a use-after-free error that could crash v2 Tor onion services
13423 when they failed to open circuits while expiring introduction
13424 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13425 also tracked as TROVE-2017-013 and CVE-2017-8823.
13427 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13428 - When running as a relay, make sure that we never build a path
13429 through ourselves, even in the case where we have somehow lost the
13430 version of our descriptor appearing in the consensus. Fixes part
13431 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13432 as TROVE-2017-012 and CVE-2017-8822.
13434 o Minor features (bridge, backport from 0.3.1.9):
13435 - Bridges now include notice in their descriptors that they are
13436 bridges, and notice of their distribution status, based on their
13437 publication settings. Implements ticket 18329. For more fine-
13438 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13441 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13442 - Add an IPv6 address for the "bastet" directory authority. Closes
13445 o Minor features (geoip):
13446 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13449 o Minor features (security, windows, backport from 0.3.1.1-alpha):
13450 - Enable a couple of pieces of Windows hardening: one
13451 (HeapEnableTerminationOnCorruption) that has been on-by-default
13452 since Windows 8, and unavailable before Windows 7; and one
13453 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
13454 affect us, but shouldn't do any harm. Closes ticket 21953.
13456 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
13457 - Avoid unnecessary calls to directory_fetches_from_authorities() on
13458 relays, to prevent spurious address resolutions and descriptor
13459 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13460 bugfix on in 0.2.8.1-alpha.
13462 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
13463 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
13464 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13466 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
13467 - When a circuit is marked for close, do not attempt to package any
13468 cells for channels on that circuit. Previously, we would detect
13469 this condition lower in the call stack, when we noticed that the
13470 circuit had no attached channel, and log an annoying message.
13471 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13473 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
13474 - Avoid a crash when transitioning from client mode to bridge mode.
13475 Previously, we would launch the worker threads whenever our
13476 "public server" mode changed, but not when our "server" mode
13477 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13479 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
13480 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13481 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13484 Changes in version 0.2.8.17 - 2017-12-01
13485 Tor 0.2.8.17 backports important security and stability bugfixes from
13486 later Tor releases. All Tor users should upgrade to this release, or
13487 to another of the releases coming out today.
13489 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
13490 2018. If you need a release with long-term support, please upgrade with
13491 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13493 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13494 - Fix a denial of service bug where an attacker could use a
13495 malformed directory object to cause a Tor instance to pause while
13496 OpenSSL would try to read a passphrase from the terminal. (Tor
13497 instances run without a terminal, which is the case for most Tor
13498 packages, are not impacted.) Fixes bug 24246; bugfix on every
13499 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13500 Found by OSS-Fuzz as testcase 6360145429790720.
13501 - When checking for replays in the INTRODUCE1 cell data for a
13502 (legacy) onion service, correctly detect replays in the RSA-
13503 encrypted part of the cell. We were previously checking for
13504 replays on the entire cell, but those can be circumvented due to
13505 the malleability of Tor's legacy hybrid encryption. This fix helps
13506 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13507 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13510 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13511 - Fix a use-after-free error that could crash v2 Tor onion services
13512 when they failed to open circuits while expiring introduction
13513 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13514 also tracked as TROVE-2017-013 and CVE-2017-8823.
13516 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13517 - When running as a relay, make sure that we never build a path through
13518 ourselves, even in the case where we have somehow lost the version of
13519 our descriptor appearing in the consensus. Fixes part of bug 21534;
13520 bugfix on 0.2.0.1-alpha. This issue is also tracked as TROVE-2017-012
13523 o Minor features (bridge, backport from 0.3.1.9):
13524 - Bridges now include notice in their descriptors that they are
13525 bridges, and notice of their distribution status, based on their
13526 publication settings. Implements ticket 18329. For more fine-
13527 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13530 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13531 - Add an IPv6 address for the "bastet" directory authority. Closes
13534 o Minor features (geoip):
13535 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13538 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
13539 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13540 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13543 Changes in version 0.2.5.16 - 2017-12-01
13544 Tor 0.2.5.13 backports important security and stability bugfixes from
13545 later Tor releases. All Tor users should upgrade to this release, or
13546 to another of the releases coming out today.
13548 Note: the Tor 0.2.5 series will no longer be supported after 1 May
13549 2018. If you need a release with long-term support, please upgrade to
13550 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13552 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13553 - Fix a denial of service bug where an attacker could use a
13554 malformed directory object to cause a Tor instance to pause while
13555 OpenSSL would try to read a passphrase from the terminal. (Tor
13556 instances run without a terminal, which is the case for most Tor
13557 packages, are not impacted.) Fixes bug 24246; bugfix on every
13558 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13559 Found by OSS-Fuzz as testcase 6360145429790720.
13560 - When checking for replays in the INTRODUCE1 cell data for a
13561 (legacy) onion service, correctly detect replays in the RSA-
13562 encrypted part of the cell. We were previously checking for
13563 replays on the entire cell, but those can be circumvented due to
13564 the malleability of Tor's legacy hybrid encryption. This fix helps
13565 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13566 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13569 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13570 - When running as a relay, make sure that we never build a path
13571 through ourselves, even in the case where we have somehow lost the
13572 version of our descriptor appearing in the consensus. Fixes part
13573 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13574 as TROVE-2017-012 and CVE-2017-8822.
13576 o Minor features (bridge, backport from 0.3.1.9):
13577 - Bridges now include notice in their descriptors that they are
13578 bridges, and notice of their distribution status, based on their
13579 publication settings. Implements ticket 18329. For more fine-
13580 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13583 o Minor features (geoip):
13584 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13588 Changes in version 0.3.2.5-alpha - 2017-11-22
13589 Tor 0.3.2.5-alpha is the fifth alpha release in the 0.3.2.x series. It
13590 fixes several stability and reliability bugs, including a fix for
13591 intermittent bootstrapping failures that some people have been seeing
13592 since the 0.3.0.x series.
13594 Please test this alpha out -- many of these fixes will soon be
13595 backported to stable Tor versions if no additional bugs are found
13598 o Major bugfixes (bootstrapping):
13599 - Fetch descriptors aggressively whenever we lack enough to build
13600 circuits, regardless of how many descriptors we are missing.
13601 Previously, we would delay launching the fetch when we had fewer
13602 than 15 missing descriptors, even if some of those descriptors
13603 were blocking circuits from building. Fixes bug 23985; bugfix on
13604 0.1.1.11-alpha. The effects of this bug became worse in
13605 0.3.0.3-alpha, when we began treating missing descriptors from our
13606 primary guards as a reason to delay circuits.
13607 - Don't try fetching microdescriptors from relays that have failed
13608 to deliver them in the past. Fixes bug 23817; bugfix
13611 o Minor features (directory authority):
13612 - Make the "Exit" flag assignment only depend on whether the exit
13613 policy allows connections to ports 80 and 443. Previously relays
13614 would get the Exit flag if they allowed connections to one of
13615 these ports and also port 6667. Resolves ticket 23637.
13617 o Minor features (geoip):
13618 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13621 o Minor features (linux seccomp2 sandbox):
13622 - Update the sandbox rules so that they should now work correctly
13623 with Glibc 2.26. Closes ticket 24315.
13625 o Minor features (logging):
13626 - Downgrade a pair of log messages that could occur when an exit's
13627 resolver gave us an unusual (but not forbidden) response. Closes
13629 - Improve the message we log when re-enabling circuit build timeouts
13630 after having received a consensus. Closes ticket 20963.
13632 o Minor bugfixes (compilation):
13633 - Fix a memory leak warning in one of the libevent-related
13634 configuration tests that could occur when manually specifying
13635 -fsanitize=address. Fixes bug 24279; bugfix on 0.3.0.2-alpha.
13636 Found and patched by Alex Xu.
13637 - When detecting OpenSSL on Windows from our configure script, make
13638 sure to try linking with the ws2_32 library. Fixes bug 23783;
13639 bugfix on 0.3.2.2-alpha.
13641 o Minor bugfixes (control port, linux seccomp2 sandbox):
13642 - Avoid a crash when attempting to use the seccomp2 sandbox together
13643 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
13646 o Minor bugfixes (control port, onion services):
13647 - Report "FAILED" instead of "UPLOAD_FAILED" "FAILED" for the
13648 HS_DESC event when a service is not able to upload a descriptor.
13649 Fixes bug 24230; bugfix on 0.2.7.1-alpha.
13651 o Minor bugfixes (directory cache):
13652 - Recover better from empty or corrupt files in the consensus cache
13653 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
13654 - When a consensus diff calculation is only partially successful,
13655 only record the successful parts as having succeeded. Partial
13656 success can happen if (for example) one compression method fails
13657 but the others succeed. Previously we misrecorded all the
13658 calculations as having succeeded, which would later cause a
13659 nonfatal assertion failure. Fixes bug 24086; bugfix
13662 o Minor bugfixes (logging):
13663 - Only log once if we notice that KIST support is gone. Fixes bug
13664 24158; bugfix on 0.3.2.1-alpha.
13665 - Suppress a log notice when relay descriptors arrive. We already
13666 have a bootstrap progress for this so no need to log notice
13667 everytime tor receives relay descriptors. Microdescriptors behave
13668 the same. Fixes bug 23861; bugfix on 0.2.8.2-alpha.
13670 o Minor bugfixes (network layer):
13671 - When closing a connection via close_connection_immediately(), we
13672 mark it as "not blocked on bandwidth", to prevent later calls from
13673 trying to unblock it, and give it permission to read. This fixes a
13674 backtrace warning that can happen on relays under various
13675 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
13677 o Minor bugfixes (onion services):
13678 - The introduction circuit was being timed out too quickly while
13679 waiting for the rendezvous circuit to complete. Keep the intro
13680 circuit around longer instead of timing out and reopening new ones
13681 constantly. Fixes bug 23681; bugfix on 0.2.4.8-alpha.
13682 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
13683 so it matches dir-spec.txt. Fixes bug 24262; bugfix
13685 - Silence a warning about failed v3 onion descriptor uploads that
13686 can happen naturally under certain edge cases. Fixes part of bug
13687 23662; bugfix on 0.3.2.1-alpha.
13689 o Minor bugfixes (tests):
13690 - Fix a memory leak in one of the bridge-distribution test cases.
13691 Fixes bug 24345; bugfix on 0.3.2.3-alpha.
13692 - Fix a bug in our fuzzing mock replacement for crypto_pk_checksig(),
13693 to correctly handle cases where a caller gives it an RSA key of
13694 under 160 bits. (This is not actually a bug in Tor itself, but
13695 rather in our fuzzing code.) Fixes bug 24247; bugfix on
13696 0.3.0.3-alpha. Found by OSS-Fuzz as issue 4177.
13699 - Add notes in man page regarding OS support for the various
13700 scheduler types. Attempt to use less jargon in the scheduler
13701 section. Closes ticket 24254.
13704 Changes in version 0.3.2.4-alpha - 2017-11-08
13705 Tor 0.3.2.4-alpha is the fourth alpha release in the 0.3.2.x series.
13706 It fixes several stability and reliability bugs, especially including
13707 a major reliability issue that has been plaguing fast exit relays in
13710 o Major bugfixes (exit relays, DNS):
13711 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13712 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13713 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13714 identifying and finding a workaround to this bug and to Moritz,
13715 Arthur Edelstein, and Roger for helping to track it down and
13718 o Major bugfixes (scheduler, channel):
13719 - Stop processing scheduled channels if they closed while flushing
13720 cells. This can happen if the write on the connection fails
13721 leading to the channel being closed while in the scheduler loop.
13722 Fixes bug 23751; bugfix on 0.3.2.1-alpha.
13724 o Minor features (logging, scheduler):
13725 - Introduce a SCHED_BUG() function to log extra information about
13726 the scheduler state if we ever catch a bug in the scheduler.
13727 Closes ticket 23753.
13729 o Minor features (removed deprecations):
13730 - The ClientDNSRejectInternalAddresses flag can once again be set in
13731 non-testing Tor networks, so long as they do not use the default
13732 directory authorities. This change also removes the deprecation of
13733 this flag from 0.2.9.2-alpha. Closes ticket 21031.
13735 o Minor features (testing):
13736 - Our fuzzing tests now test the encrypted portions of v3 onion
13737 service descriptors. Implements more of 21509.
13739 o Minor bugfixes (directory client):
13740 - On failure to download directory information, delay retry attempts
13741 by a random amount based on the "decorrelated jitter" algorithm.
13742 Our previous delay algorithm tended to produce extra-long delays
13743 too easily. Fixes bug 23816; bugfix on 0.2.9.1-alpha.
13745 o Minor bugfixes (IPv6, v3 single onion services):
13746 - Remove buggy code for IPv6-only v3 single onion services, and
13747 reject attempts to configure them. This release supports IPv4,
13748 dual-stack, and IPv6-only v3 onion services; and IPv4 and dual-
13749 stack v3 single onion services. Fixes bug 23820; bugfix
13752 o Minor bugfixes (logging, relay):
13753 - Give only a protocol warning when the ed25519 key is not
13754 consistent between the descriptor and microdescriptor of a relay.
13755 This can happen, for instance, if the relay has been flagged
13756 NoEdConsensus. Fixes bug 24025; bugfix on 0.3.2.1-alpha.
13758 o Minor bugfixes (manpage, onion service):
13759 - Document that the HiddenServiceNumIntroductionPoints option is
13760 0-10 for v2 services and 0-20 for v3 services. Fixes bug 24115;
13761 bugfix on 0.3.2.1-alpha.
13763 o Minor bugfixes (memory leaks):
13764 - Fix a minor memory leak at exit in the KIST scheduler. This bug
13765 should have no user-visible impact. Fixes bug 23774; bugfix
13767 - Fix a memory leak when decrypting a badly formatted v3 onion
13768 service descriptor. Fixes bug 24150; bugfix on 0.3.2.1-alpha.
13769 Found by OSS-Fuzz; this is OSS-Fuzz issue 3994.
13771 o Minor bugfixes (onion services):
13772 - Cache some needed onion service client information instead of
13773 constantly computing it over and over again. Fixes bug 23623;
13774 bugfix on 0.3.2.1-alpha.
13775 - Properly retry HSv3 descriptor fetches when missing required
13776 directory information. Fixes bug 23762; bugfix on 0.3.2.1-alpha.
13778 o Minor bugfixes (path selection):
13779 - When selecting relays by bandwidth, avoid a rounding error that
13780 could sometimes cause load to be imbalanced incorrectly.
13781 Previously, we would always round upwards; now, we round towards
13782 the nearest integer. This had the biggest effect when a relay's
13783 weight adjustments should have given it weight 0, but it got
13784 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
13785 - When calculating the fraction of nodes that have descriptors, and
13786 all nodes in the network have zero bandwidths, count the number of
13787 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
13788 - Actually log the total bandwidth in compute_weighted_bandwidths().
13789 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
13791 o Minor bugfixes (relay, crash):
13792 - Avoid a crash when transitioning from client mode to bridge mode.
13793 Previously, we would launch the worker threads whenever our
13794 "public server" mode changed, but not when our "server" mode
13795 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13797 o Minor bugfixes (testing):
13798 - Fix a spurious fuzzing-only use of an uninitialized value. Found
13799 by Brian Carpenter. Fixes bug 24082; bugfix on 0.3.0.3-alpha.
13800 - Test that IPv6-only clients can use microdescriptors when running
13801 "make test-network-all". Requires chutney master 61c28b9 or later.
13802 Closes ticket 24109.
13805 Changes in version 0.3.2.3-alpha - 2017-10-27
13806 Tor 0.3.2.3-alpha is the third release in the 0.3.2 series. It fixes
13807 numerous small bugs in earlier versions of 0.3.2.x, and adds a new
13808 directory authority, Bastet.
13810 o Directory authority changes:
13811 - Add "Bastet" as a ninth directory authority to the default list.
13812 Closes ticket 23910.
13813 - The directory authority "Longclaw" has changed its IP address.
13814 Closes ticket 23592.
13816 o Minor features (bridge):
13817 - Bridge relays can now set the BridgeDistribution config option to
13818 add a "bridge-distribution-request" line to their bridge
13819 descriptor, which tells BridgeDB how they'd like their bridge
13820 address to be given out. (Note that as of Oct 2017, BridgeDB does
13821 not yet implement this feature.) As a side benefit, this feature
13822 provides a way to distinguish bridge descriptors from non-bridge
13823 descriptors. Implements tickets 18329.
13825 o Minor features (client, entry guards):
13826 - Improve log messages when missing descriptors for primary guards.
13827 Resolves ticket 23670.
13829 o Minor features (geoip):
13830 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13833 o Minor bugfixes (bridge):
13834 - Overwrite the bridge address earlier in the process of retrieving
13835 its descriptor, to make sure we reach it on the configured
13836 address. Fixes bug 20532; bugfix on 0.2.0.10-alpha.
13838 o Minor bugfixes (documentation):
13839 - Document better how to read gcov, and what our gcov postprocessing
13840 scripts do. Fixes bug 23739; bugfix on 0.2.9.1-alpha.
13842 o Minor bugfixes (entry guards):
13843 - Tor now updates its guard state when it reads a consensus
13844 regardless of whether it's missing descriptors. That makes tor use
13845 its primary guards to fetch descriptors in some edge cases where
13846 it would previously have used fallback directories. Fixes bug
13847 23862; bugfix on 0.3.0.1-alpha.
13849 o Minor bugfixes (hidden service client):
13850 - When handling multiple SOCKS request for the same .onion address,
13851 only fetch the service descriptor once.
13852 - When a descriptor fetch fails with a non-recoverable error, close
13853 all pending SOCKS requests for that .onion. Fixes bug 23653;
13854 bugfix on 0.3.2.1-alpha.
13856 o Minor bugfixes (hidden service):
13857 - Always regenerate missing hidden service public key files. Prior
13858 to this, if the public key was deleted from disk, it wouldn't get
13859 recreated. Fixes bug 23748; bugfix on 0.3.2.2-alpha. Patch
13861 - Make sure that we have a usable ed25519 key when the intro point
13862 relay supports ed25519 link authentication. Fixes bug 24002;
13863 bugfix on 0.3.2.1-alpha.
13865 o Minor bugfixes (hidden service, v2):
13866 - When reloading configured hidden services, copy all information
13867 from the old service object. Previously, some data was omitted,
13868 causing delays in descriptor upload, and other bugs. Fixes bug
13869 23790; bugfix on 0.2.1.9-alpha.
13871 o Minor bugfixes (memory safety, defensive programming):
13872 - Clear the target address when node_get_prim_orport() returns
13873 early. Fixes bug 23874; bugfix on 0.2.8.2-alpha.
13875 o Minor bugfixes (relay):
13876 - Avoid a BUG warning when receiving a dubious CREATE cell while an
13877 option transition is in progress. Fixes bug 23952; bugfix
13880 o Minor bugfixes (testing):
13881 - Adjust the GitLab CI configuration to more closely match that of
13882 Travis CI. Fixes bug 23757; bugfix on 0.3.2.2-alpha.
13883 - Prevent scripts/test/coverage from attempting to move gcov output
13884 to the root directory. Fixes bug 23741; bugfix on 0.2.5.1-alpha.
13885 - When running unit tests as root, skip a test that would fail
13886 because it expects a permissions error. This affects some
13887 continuous integration setups. Fixes bug 23758; bugfix
13889 - Stop unconditionally mirroring the tor repository in GitLab CI.
13890 This prevented developers from enabling GitLab CI on master. Fixes
13891 bug 23755; bugfix on 0.3.2.2-alpha.
13892 - Fix the hidden service v3 descriptor decoding fuzzing to use the
13893 latest decoding API correctly. Fixes bug 21509; bugfix
13896 o Minor bugfixes (warnings):
13897 - When we get an HTTP request on a SOCKS port, tell the user about
13898 the new HTTPTunnelPort option. Previously, we would give a "Tor is
13899 not an HTTP Proxy" message, which stopped being true when
13900 HTTPTunnelPort was introduced. Fixes bug 23678; bugfix
13904 Changes in version 0.2.5.15 - 2017-10-25
13905 Tor 0.2.5.15 backports a collection of bugfixes from later Tor release
13906 series. It also adds a new directory authority, Bastet.
13908 Note: the Tor 0.2.5 series will no longer be supported after 1 May
13909 2018. If you need a release with long-term support, please upgrade to
13910 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13912 o Directory authority changes:
13913 - Add "Bastet" as a ninth directory authority to the default list.
13914 Closes ticket 23910.
13915 - The directory authority "Longclaw" has changed its IP address.
13916 Closes ticket 23592.
13918 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
13919 - Avoid an assertion failure bug affecting our implementation of
13920 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
13921 handling of "0xx" differs from what we had expected. Fixes bug
13922 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
13924 o Minor features (geoip):
13925 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13928 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
13929 - Fix a memset() off the end of an array when packing cells. This
13930 bug should be harmless in practice, since the corrupted bytes are
13931 still in the same structure, and are always padding bytes,
13932 ignored, or immediately overwritten, depending on compiler
13933 behavior. Nevertheless, because the memset()'s purpose is to make
13934 sure that any other cell-handling bugs can't expose bytes to the
13935 network, we need to fix it. Fixes bug 22737; bugfix on
13936 0.2.4.11-alpha. Fixes CID 1401591.
13938 o Build features (backport from 0.3.1.5-alpha):
13939 - Tor's repository now includes a Travis Continuous Integration (CI)
13940 configuration file (.travis.yml). This is meant to help new
13941 developers and contributors who fork Tor to a Github repository be
13942 better able to test their changes, and understand what we expect
13943 to pass. To use this new build feature, you must fork Tor to your
13944 Github account, then go into the "Integrations" menu in the
13945 repository settings for your fork and enable Travis, then push
13946 your changes. Closes ticket 22636.
13949 Changes in version 0.2.8.16 - 2017-10-25
13950 Tor 0.2.8.16 backports a collection of bugfixes from later Tor release
13951 series, including a bugfix for a crash issue that had affected relays
13952 under memory pressure. It also adds a new directory authority, Bastet.
13954 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
13955 2018. If you need a release with long-term support, please stick with
13956 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13958 o Directory authority changes:
13959 - Add "Bastet" as a ninth directory authority to the default list.
13960 Closes ticket 23910.
13961 - The directory authority "Longclaw" has changed its IP address.
13962 Closes ticket 23592.
13964 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13965 - Fix a timing-based assertion failure that could occur when the
13966 circuit out-of-memory handler freed a connection's output buffer.
13967 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13969 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13970 - Remove longclaw's IPv6 address, as it will soon change. Authority
13971 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13972 3/8 directory authorities with IPv6 addresses, but there are also
13973 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13975 o Minor features (geoip):
13976 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13980 Changes in version 0.2.9.13 - 2017-10-25
13981 Tor 0.2.9.13 backports a collection of bugfixes from later Tor release
13982 series, including a bugfix for a crash issue that had affected relays
13983 under memory pressure. It also adds a new directory authority, Bastet.
13985 o Directory authority changes:
13986 - Add "Bastet" as a ninth directory authority to the default list.
13987 Closes ticket 23910.
13988 - The directory authority "Longclaw" has changed its IP address.
13989 Closes ticket 23592.
13991 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13992 - Fix a timing-based assertion failure that could occur when the
13993 circuit out-of-memory handler freed a connection's output buffer.
13994 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13996 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13997 - Remove longclaw's IPv6 address, as it will soon change. Authority
13998 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13999 3/8 directory authorities with IPv6 addresses, but there are also
14000 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
14002 o Minor features (geoip):
14003 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
14006 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
14007 - When a directory authority rejects a descriptor or extrainfo with
14008 a given digest, mark that digest as undownloadable, so that we do
14009 not attempt to download it again over and over. We previously
14010 tried to avoid downloading such descriptors by other means, but we
14011 didn't notice if we accidentally downloaded one anyway. This
14012 behavior became problematic in 0.2.7.2-alpha, when authorities
14013 began pinning Ed25519 keys. Fixes bug 22349; bugfix
14016 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
14017 - Clear the address when node_get_prim_orport() returns early.
14018 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
14020 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
14021 - When running as a Windows service, set the ID of the main thread
14022 correctly. Failure to do so made us fail to send log messages to
14023 the controller in 0.2.1.16-rc, slowed down controller event
14024 delivery in 0.2.7.3-rc and later, and crash with an assertion
14025 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
14026 Patch and diagnosis from "Vort".
14029 Changes in version 0.3.0.12 - 2017-10-25
14030 Tor 0.3.0.12 backports a collection of bugfixes from later Tor release
14031 series, including a bugfix for a crash issue that had affected relays
14032 under memory pressure. It also adds a new directory authority, Bastet.
14034 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
14035 2018. If you need a release with long-term support, please stick with
14036 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
14038 o Directory authority changes:
14039 - Add "Bastet" as a ninth directory authority to the default list.
14040 Closes ticket 23910.
14041 - The directory authority "Longclaw" has changed its IP address.
14042 Closes ticket 23592.
14044 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
14045 - Fix a timing-based assertion failure that could occur when the
14046 circuit out-of-memory handler freed a connection's output buffer.
14047 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
14049 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
14050 - Remove longclaw's IPv6 address, as it will soon change. Authority
14051 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
14052 3/8 directory authorities with IPv6 addresses, but there are also
14053 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
14055 o Minor features (geoip):
14056 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
14059 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
14060 - When a directory authority rejects a descriptor or extrainfo with
14061 a given digest, mark that digest as undownloadable, so that we do
14062 not attempt to download it again over and over. We previously
14063 tried to avoid downloading such descriptors by other means, but we
14064 didn't notice if we accidentally downloaded one anyway. This
14065 behavior became problematic in 0.2.7.2-alpha, when authorities
14066 began pinning Ed25519 keys. Fixes bug 22349; bugfix
14069 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
14070 - Avoid a possible double close of a circuit by the intro point on
14071 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
14072 bugfix on 0.3.0.1-alpha.
14074 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
14075 - Clear the address when node_get_prim_orport() returns early.
14076 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
14078 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
14079 - When running as a Windows service, set the ID of the main thread
14080 correctly. Failure to do so made us fail to send log messages to
14081 the controller in 0.2.1.16-rc, slowed down controller event
14082 delivery in 0.2.7.3-rc and later, and crash with an assertion
14083 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
14084 Patch and diagnosis from "Vort".
14087 Changes in version 0.3.1.8 - 2017-10-25
14088 Tor 0.3.1.8 is the second stable release in the 0.3.1 series.
14089 It includes several bugfixes, including a bugfix for a crash issue
14090 that had affected relays under memory pressure. It also adds
14091 a new directory authority, Bastet.
14093 o Directory authority changes:
14094 - Add "Bastet" as a ninth directory authority to the default list.
14095 Closes ticket 23910.
14096 - The directory authority "Longclaw" has changed its IP address.
14097 Closes ticket 23592.
14099 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
14100 - Fix a timing-based assertion failure that could occur when the
14101 circuit out-of-memory handler freed a connection's output buffer.
14102 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
14104 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
14105 - Remove longclaw's IPv6 address, as it will soon change. Authority
14106 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
14107 3/8 directory authorities with IPv6 addresses, but there are also
14108 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
14110 o Minor features (geoip):
14111 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
14114 o Minor bugfixes (compilation, backport from 0.3.2.2-alpha):
14115 - Fix a compilation warning when building with zstd support on
14116 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
14117 and fixed by Andreas Stieger.
14119 o Minor bugfixes (compression, backport from 0.3.2.2-alpha):
14120 - Handle a pathological case when decompressing Zstandard data when
14121 the output buffer size is zero. Fixes bug 23551; bugfix
14124 o Minor bugfixes (directory authority, backport from 0.3.2.1-alpha):
14125 - Remove the length limit on HTTP status lines that authorities can
14126 send in their replies. Fixes bug 23499; bugfix on 0.3.1.6-rc.
14128 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
14129 - Avoid a possible double close of a circuit by the intro point on
14130 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
14131 bugfix on 0.3.0.1-alpha.
14133 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
14134 - Clear the address when node_get_prim_orport() returns early.
14135 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
14137 o Minor bugfixes (unit tests, backport from 0.3.2.2-alpha):
14138 - Fix additional channelpadding unit test failures by using mocked
14139 time instead of actual time for all tests. Fixes bug 23608; bugfix
14143 Changes in version 0.3.2.2-alpha - 2017-09-29
14144 Tor 0.3.2.2-alpha is the second release in the 0.3.2 series. This
14145 release fixes several minor bugs in the new scheduler and next-
14146 generation onion services; both features were newly added in the 0.3.2
14147 series. Other fixes in this alpha include several fixes for non-fatal
14148 tracebacks which would appear in logs.
14150 With the aim to stabilise the 0.3.2 series by 15 December 2017, this
14151 alpha does not contain any substantial new features. Minor features
14152 include better testing and logging.
14154 The following comprises the complete list of changes included
14157 o Major bugfixes (relay, crash, assertion failure):
14158 - Fix a timing-based assertion failure that could occur when the
14159 circuit out-of-memory handler freed a connection's output buffer.
14160 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
14162 o Major bugfixes (scheduler):
14163 - If a channel is put into the scheduler's pending list, then it
14164 starts closing, and then if the scheduler runs before it finishes
14165 closing, the scheduler will get stuck trying to flush its cells
14166 while the lower layers refuse to cooperate. Fix that race
14167 condition by giving the scheduler an escape method. Fixes bug
14168 23676; bugfix on 0.3.2.1-alpha.
14170 o Minor features (build, compilation):
14171 - The "check-changes" feature is now part of the "make check" tests;
14172 we'll use it to try to prevent misformed changes files from
14173 accumulating. Closes ticket 23564.
14174 - Tor builds should now fail if there are any mismatches between the
14175 C type representing a configuration variable and the C type the
14176 data-driven parser uses to store a value there. Previously, we
14177 needed to check these by hand, which sometimes led to mistakes.
14178 Closes ticket 23643.
14180 o Minor features (directory authorities):
14181 - Remove longclaw's IPv6 address, as it will soon change. Authority
14182 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
14183 3/8 directory authorities with IPv6 addresses, but there are also
14184 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
14186 o Minor features (hidden service, circuit, logging):
14187 - Improve logging of many callsite in the circuit subsystem to print
14188 the circuit identifier(s).
14189 - Log when we cleanup an intro point from a service so we know when
14190 and for what reason it happened. Closes ticket 23604.
14192 o Minor features (logging):
14193 - Log more circuit information whenever we are about to try to
14194 package a relay cell on a circuit with a nonexistent n_chan.
14195 Attempt to diagnose ticket 8185.
14196 - Improve info-level log identification of particular circuits, to
14197 help with debugging. Closes ticket 23645.
14199 o Minor features (relay):
14200 - When choosing which circuits can be expired as unused, consider
14201 circuits from clients even if those clients used regular CREATE
14202 cells to make them; and do not consider circuits from relays even
14203 if they were made with CREATE_FAST. Part of ticket 22805.
14205 o Minor features (robustness):
14206 - Change several fatal assertions when flushing buffers into non-
14207 fatal assertions, to prevent any recurrence of 23690.
14209 o Minor features (spec conformance, bridge, diagnostic):
14210 - When handling the USERADDR command on an ExtOrPort, warn when the
14211 transports provides a USERADDR with no port. In a future version,
14212 USERADDR commands of this format may be rejected. Detects problems
14213 related to ticket 23080.
14215 o Minor features (testing):
14216 - Add a unit test to make sure that our own generated platform
14217 string will be accepted by directory authorities. Closes
14220 o Minor bugfixes (bootstrapping):
14221 - When warning about state file clock skew, report the correct
14222 direction for the detected skew. Fixes bug 23606; bugfix
14224 - Avoid an assertion failure when logging a state file clock skew
14225 very early in bootstrapping. Fixes bug 23607; bugfix
14228 o Minor bugfixes (build, compilation):
14229 - Fix a compilation warning when building with zstd support on
14230 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
14231 and fixed by Andreas Stieger.
14232 - When searching for OpenSSL, don't accept any OpenSSL library that
14233 lacks TLSv1_1_method(): Tor doesn't build with those versions.
14234 Additionally, look in /usr/local/opt/openssl, if it's present.
14235 These changes together repair the default build on OSX systems
14236 with Homebrew installed. Fixes bug 23602; bugfix on 0.2.7.2-alpha.
14238 o Minor bugfixes (compression):
14239 - Handle a pathological case when decompressing Zstandard data when
14240 the output buffer size is zero. Fixes bug 23551; bugfix
14243 o Minor bugfixes (documentation):
14244 - Fix manpage to not refer to the obsolete (and misspelled)
14245 UseEntryGuardsAsDirectoryGuards parameter in the description of
14246 NumDirectoryGuards. Fixes bug 23611; bugfix on 0.2.4.8-alpha.
14248 o Minor bugfixes (hidden service v3):
14249 - Don't log an assertion failure when we can't find the right
14250 information to extend to an introduction point. In rare cases,
14251 this could happen, causing a warning, even though tor would
14252 recover gracefully. Fixes bug 23159; bugfix on 0.3.2.1-alpha.
14253 - Pad RENDEZVOUS cell up to the size of the legacy cell which is
14254 much bigger so the rendezvous point can't distinguish which hidden
14255 service protocol is being used. Fixes bug 23420; bugfix
14258 o Minor bugfixes (hidden service, relay):
14259 - Avoid a possible double close of a circuit by the intro point on
14260 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
14261 bugfix on 0.3.0.1-alpha.
14263 o Minor bugfixes (logging, relay shutdown, annoyance):
14264 - When a circuit is marked for close, do not attempt to package any
14265 cells for channels on that circuit. Previously, we would detect
14266 this condition lower in the call stack, when we noticed that the
14267 circuit had no attached channel, and log an annoying message.
14268 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
14270 o Minor bugfixes (scheduler):
14271 - When switching schedulers due to a consensus change, we didn't
14272 give the new scheduler a chance to react to the consensus. Fix
14273 that. Fixes bug 23537; bugfix on 0.3.2.1-alpha.
14274 - Make the KISTSchedRunInterval option a non negative value. With
14275 this, the way to disable KIST through the consensus is to set it
14276 to 0. Fixes bug 23539; bugfix on 0.3.2.1-alpha.
14277 - Only notice log the selected scheduler when we switch scheduler
14278 types. Fixes bug 23552; bugfix on 0.3.2.1-alpha.
14279 - Avoid a compilation warning on macOS in scheduler_ev_add() caused
14280 by a different tv_usec data type. Fixes bug 23575; bugfix
14282 - Make a hard exit if tor is unable to pick a scheduler which can
14283 happen if the user specifies a scheduler type that is not
14284 supported and not other types in Schedulers. Fixes bug 23581;
14285 bugfix on 0.3.2.1-alpha.
14286 - Properly initialize the scheduler last run time counter so it is
14287 not 0 at the first tick. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
14289 o Minor bugfixes (testing):
14290 - Capture and detect several "Result does not fit" warnings in unit
14291 tests on platforms with 32-bit time_t. Fixes bug 21800; bugfix
14293 - Fix additional channelpadding unit test failures by using mocked
14294 time instead of actual time for all tests. Fixes bug 23608; bugfix
14296 - The removal of some old scheduler options caused some tests to
14297 fail on BSD systems. Assume current behavior is correct and make
14298 the tests pass again. Fixes bug 23566; bugfix on 0.3.2.1-alpha.
14300 o Code simplification and refactoring:
14301 - Remove various ways of testing circuits and connections for
14302 "clientness"; instead, favor channel_is_client(). Part of
14305 o Deprecated features:
14306 - The ReachableDirAddresses and ClientPreferIPv6DirPort options are
14307 now deprecated; they do not apply to relays, and they have had no
14308 effect on clients since 0.2.8.x. Closes ticket 19704.
14311 - HiddenServiceVersion man page entry wasn't mentioning the now
14312 supported version 3. Fixes ticket 23580; bugfix on 0.3.2.1-alpha.
14313 - Clarify that the Address option is entirely about setting an
14314 advertised IPv4 address. Closes ticket 18891.
14315 - Clarify the manpage's use of the term "address" to clarify what
14316 kind of address is intended. Closes ticket 21405.
14317 - Document that onion service subdomains are allowed, and ignored.
14318 Closes ticket 18736.
14321 Changes in version 0.3.2.1-alpha - 2017-09-18
14322 Tor 0.3.2.1-alpha is the first release in the 0.3.2.x series. It
14323 includes support for our next-generation ("v3") onion service
14324 protocol, and adds a new circuit scheduler for more responsive
14325 forwarding decisions from relays. There are also numerous other small
14326 features and bugfixes here.
14328 Below are the changes since Tor 0.3.1.7.
14330 o Major feature (scheduler, channel):
14331 - Tor now uses new schedulers to decide which circuits should
14332 deliver cells first, in order to improve congestion at relays. The
14333 first type is called "KIST" ("Kernel Informed Socket Transport"),
14334 and is only available on Linux-like systems: it uses feedback from
14335 the kernel to prevent the kernel's TCP buffers from growing too
14336 full. The second new scheduler type is called "KISTLite": it
14337 behaves the same as KIST, but runs on systems without kernel
14338 support for inspecting TCP implementation details. The old
14339 scheduler is still available, under the name "Vanilla". To change
14340 the default scheduler preference order, use the new "Schedulers"
14341 option. (The default preference order is "KIST,KISTLite,Vanilla".)
14343 Matt Traudt implemented KIST, based on research by Rob Jansen,
14344 John Geddes, Christ Wacek, Micah Sherr, and Paul Syverson. For
14345 more information, see the design paper at
14346 http://www.robgjansen.com/publications/kist-sec2014.pdf and the
14347 followup implementation paper at https://arxiv.org/abs/1709.01044.
14348 Closes ticket 12541.
14350 o Major features (next-generation onion services):
14351 - Tor now supports the next-generation onion services protocol for
14352 clients and services! As part of this release, the core of
14353 proposal 224 has been implemented and is available for
14354 experimentation and testing by our users. This newer version of
14355 onion services ("v3") features many improvements over the legacy
14358 a) Better crypto (replaced SHA1/DH/RSA1024
14359 with SHA3/ed25519/curve25519)
14361 b) Improved directory protocol, leaking much less information to
14364 c) Improved directory protocol, with smaller surface for
14367 d) Better onion address security against impersonation.
14369 e) More extensible introduction/rendezvous protocol.
14371 f) A cleaner and more modular codebase.
14373 You can identify a next-generation onion address by its length:
14374 they are 56 characters long, as in
14375 "4acth47i6kxnvkewtm6q7ib2s3ufpo5sqbsnzjpbi7utijcltosqemad.onion".
14377 In the future, we will release more options and features for v3
14378 onion services, but we first need a testing period, so that the
14379 current codebase matures and becomes more robust. Planned features
14380 include: offline keys, advanced client authorization, improved
14381 guard algorithms, and statistics. For full details, see
14384 Legacy ("v2") onion services will still work for the foreseeable
14385 future, and will remain the default until this new codebase gets
14386 tested and hardened. Service operators who want to experiment with
14387 the new system can use the 'HiddenServiceVersion 3' torrc
14388 directive along with the regular onion service configuration
14389 options. We will publish a blog post about this new feature
14392 o Major bugfixes (usability, control port):
14393 - Report trusted clock skew indications as bootstrap errors, so
14394 controllers can more easily alert users when their clocks are
14395 wrong. Fixes bug 23506; bugfix on 0.1.2.6-alpha.
14397 o Minor features (bug detection):
14398 - Log a warning message with a stack trace for any attempt to call
14399 get_options() during option validation. This pattern has caused
14400 subtle bugs in the past. Closes ticket 22281.
14402 o Minor features (client):
14403 - You can now use Tor as a tunneled HTTP proxy: use the new
14404 HTTPTunnelPort option to open a port that accepts HTTP CONNECT
14405 requests. Closes ticket 22407.
14406 - Add an extra check to make sure that we always use the newer guard
14407 selection code for picking our guards. Closes ticket 22779.
14408 - When downloading (micro)descriptors, don't split the list into
14409 multiple requests unless we want at least 32 descriptors.
14410 Previously, we split at 4, not 32, which led to significant
14411 overhead in HTTP request size and degradation in compression
14412 performance. Closes ticket 23220.
14414 o Minor features (command line):
14415 - Add a new commandline option, --key-expiration, which prints when
14416 the current signing key is going to expire. Implements ticket
14417 17639; patch by Isis Lovecruft.
14419 o Minor features (control port):
14420 - If an application tries to use the control port as an HTTP proxy,
14421 respond with a meaningful "This is the Tor control port" message,
14422 and log the event. Closes ticket 1667. Patch from Ravi
14424 - Provide better error message for GETINFO desc/(id|name) when not
14425 fetching router descriptors. Closes ticket 5847. Patch by
14427 - Add GETINFO "{desc,md}/download-enabled", to inform the controller
14428 whether Tor will try to download router descriptors and
14429 microdescriptors respectively. Closes ticket 22684.
14430 - Added new GETINFO targets "ip-to-country/{ipv4,ipv6}-available",
14431 so controllers can tell whether the geoip databases are loaded.
14432 Closes ticket 23237.
14433 - Adds a timestamp field to the CIRC_BW and STREAM_BW bandwidth
14434 events. Closes ticket 19254. Patch by "DonnchaC".
14436 o Minor features (development support):
14437 - Developers can now generate a call-graph for Tor using the
14438 "calltool" python program, which post-processes object dumps. It
14439 should work okay on many Linux and OSX platforms, and might work
14440 elsewhere too. To run it, install calltool from
14441 https://gitweb.torproject.org/user/nickm/calltool.git and run
14442 "make callgraph". Closes ticket 19307.
14444 o Minor features (ed25519):
14445 - Add validation function to checks for torsion components in
14446 ed25519 public keys, used by prop224 client-side code. Closes
14447 ticket 22006. Math help by Ian Goldberg.
14449 o Minor features (exit relay, DNS):
14450 - Improve the clarity and safety of the log message from evdns when
14451 receiving an apparently spoofed DNS reply. Closes ticket 3056.
14453 o Minor features (integration, hardening):
14454 - Add a new NoExec option to prevent Tor from running other
14455 programs. When this option is set to 1, Tor will never try to run
14456 another program, regardless of the settings of
14457 PortForwardingHelper, ClientTransportPlugin, or
14458 ServerTransportPlugin. Once NoExec is set, it cannot be disabled
14459 without restarting Tor. Closes ticket 22976.
14461 o Minor features (logging):
14462 - Improve the warning message for specifying a relay by nickname.
14463 The previous message implied that nickname registration was still
14464 part of the Tor network design, which it isn't. Closes
14466 - If the sandbox filter fails to load, suggest to the user that
14467 their kernel might not support seccomp2. Closes ticket 23090.
14469 o Minor features (portability):
14470 - Check at configure time whether uint8_t is the same type as
14471 unsigned char. Lots of existing code already makes this
14472 assumption, and there could be strict aliasing issues if the
14473 assumption is violated. Closes ticket 22410.
14475 o Minor features (relay, configuration):
14476 - Reject attempts to use relative file paths when RunAsDaemon is
14477 set. Previously, Tor would accept these, but the directory-
14478 changing step of RunAsDaemon would give strange and/or confusing
14479 results. Closes ticket 22731.
14481 o Minor features (startup, safety):
14482 - When configured to write a PID file, Tor now exits if it is unable
14483 to do so. Previously, it would warn and continue. Closes
14486 o Minor features (static analysis):
14487 - The BUG() macro has been changed slightly so that Coverity no
14488 longer complains about dead code if the bug is impossible. Closes
14491 o Minor features (testing):
14492 - The default chutney network tests now include tests for the v3
14493 hidden service design. Make sure you have the latest version of
14494 chutney if you want to run these. Closes ticket 22437.
14495 - Add a unit test to verify that we can parse a hardcoded v2 hidden
14496 service descriptor. Closes ticket 15554.
14498 o Minor bugfixes (certificate handling):
14499 - Fix a time handling bug in Tor certificates set to expire after
14500 the year 2106. Fixes bug 23055; bugfix on 0.3.0.1-alpha. Found by
14501 Coverity as CID 1415728.
14503 o Minor bugfixes (client, usability):
14504 - Refrain from needlessly rejecting SOCKS5-with-hostnames and
14505 SOCKS4a requests that contain IP address strings, even when
14506 SafeSocks in enabled, as this prevents user from connecting to
14507 known IP addresses without relying on DNS for resolving. SafeSocks
14508 still rejects SOCKS connections that connect to IP addresses when
14509 those addresses are _not_ encoded as hostnames. Fixes bug 22461;
14510 bugfix on Tor 0.2.6.2-alpha.
14512 o Minor bugfixes (code correctness):
14513 - Call htons() in extend_cell_format() for encoding a 16-bit value.
14514 Previously we used ntohs(), which happens to behave the same on
14515 all the platforms we support, but which isn't really correct.
14516 Fixes bug 23106; bugfix on 0.2.4.8-alpha.
14517 - For defense-in-depth, make the controller's write_escaped_data()
14518 function robust to extremely long inputs. Fixes bug 19281; bugfix
14519 on 0.1.1.1-alpha. Reported by Guido Vranken.
14521 o Minor bugfixes (compilation):
14522 - Fix unused-variable warnings in donna's Curve25519 SSE2 code.
14523 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
14525 o Minor bugfixes (consensus expiry):
14526 - Check for adequate directory information correctly. Previously, Tor
14527 would reconsider whether it had sufficient directory information
14528 every 2 minutes. Fixes bug 23091; bugfix on 0.2.0.19-alpha.
14530 o Minor bugfixes (directory protocol):
14531 - Directory servers now include a "Date:" http header for response
14532 codes other than 200. Clients starting with a skewed clock and a
14533 recent consensus were getting "304 Not modified" responses from
14534 directory authorities, so without the Date header, the client
14535 would never hear about a wrong clock. Fixes bug 23499; bugfix
14537 - Make clients wait for 6 seconds before trying to download a
14538 consensus from an authority. Fixes bug 17750; bugfix
14541 o Minor bugfixes (DoS-resistance):
14542 - If future code asks if there are any running bridges, without
14543 checking if bridges are enabled, log a BUG warning rather than
14544 crashing. Fixes bug 23524; bugfix on 0.3.0.1-alpha.
14546 o Minor bugfixes (format strictness):
14547 - Restrict several data formats to decimal. Previously, the
14548 BuildTimeHistogram entries in the state file, the "bw=" entries in
14549 the bandwidth authority file, and the process IDs passed to the
14550 __OwningControllerProcess option could all be specified in hex or
14551 octal as well as in decimal. This was not an intentional feature.
14552 Fixes bug 22802; bugfixes on 0.2.2.1-alpha, 0.2.2.2-alpha,
14555 o Minor bugfixes (heartbeat):
14556 - If we fail to write a heartbeat message, schedule a retry for the
14557 minimum heartbeat interval number of seconds in the future. Fixes
14558 bug 19476; bugfix on 0.2.3.1-alpha.
14560 o Minor bugfixes (linux seccomp2 sandbox, logging):
14561 - Fix some messages on unexpected errors from the seccomp2 library.
14562 Fixes bug 22750; bugfix on 0.2.5.1-alpha. Patch from "cypherpunks".
14564 o Minor bugfixes (logging):
14565 - Remove duplicate log messages regarding opening non-local
14566 SocksPorts upon parsing config and opening listeners at startup.
14567 Fixes bug 4019; bugfix on 0.2.3.3-alpha.
14568 - Use a more comprehensible log message when telling the user
14569 they've excluded every running exit node. Fixes bug 7890; bugfix
14571 - When logging the number of descriptors we intend to download per
14572 directory request, do not log a number higher than then the number
14573 of descriptors we're fetching in total. Fixes bug 19648; bugfix
14575 - When warning about a directory owned by the wrong user, log the
14576 actual name of the user owning the directory. Previously, we'd log
14577 the name of the process owner twice. Fixes bug 23487; bugfix
14579 - The tor specification says hop counts are 1-based, so fix two log
14580 messages that mistakenly logged 0-based hop counts. Fixes bug
14581 18982; bugfix on 0.2.6.2-alpha and 0.2.4.5-alpha. Patch by teor.
14582 Credit to Xiaofan Li for reporting this issue.
14584 o Minor bugfixes (portability):
14585 - Stop using the PATH_MAX variable, which is not defined on GNU
14586 Hurd. Fixes bug 23098; bugfix on 0.3.1.1-alpha.
14588 o Minor bugfixes (relay):
14589 - When uploading our descriptor for the first time after startup,
14590 report the reason for uploading as "Tor just started" rather than
14591 leaving it blank. Fixes bug 22885; bugfix on 0.2.3.4-alpha.
14592 - Avoid unnecessary calls to directory_fetches_from_authorities() on
14593 relays, to prevent spurious address resolutions and descriptor
14594 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
14595 bugfix on in 0.2.8.1-alpha.
14597 o Minor bugfixes (tests):
14598 - Fix a broken unit test for the OutboundAddress option: the parsing
14599 function was never returning an error on failure. Fixes bug 23366;
14600 bugfix on 0.3.0.3-alpha.
14601 - Fix a signed-integer overflow in the unit tests for
14602 dir/download_status_random_backoff, which was untriggered until we
14603 fixed bug 17750. Fixes bug 22924; bugfix on 0.2.9.1-alpha.
14605 o Minor bugfixes (usability, control port):
14606 - Stop making an unnecessary routerlist check in NETINFO clock skew
14607 detection; this was preventing clients from reporting NETINFO clock
14608 skew to controllers. Fixes bug 23532; bugfix on 0.2.4.4-alpha.
14610 o Code simplification and refactoring:
14611 - Extract the code for handling newly-open channels into a separate
14612 function from the general code to handle channel state
14613 transitions. This change simplifies our callgraph, reducing the
14614 size of the largest strongly connected component by roughly a
14615 factor of two. Closes ticket 22608.
14616 - Remove dead code for largely unused statistics on the number of
14617 times we've attempted various public key operations. Fixes bug
14618 19871; bugfix on 0.1.2.4-alpha. Fix by Isis Lovecruft.
14619 - Remove several now-obsolete functions for asking about old
14620 variants directory authority status. Closes ticket 22311; patch
14622 - Remove some of the code that once supported "Named" and "Unnamed"
14623 routers. Authorities no longer vote for these flags. Closes
14625 - Rename the obsolete malleable hybrid_encrypt functions used in TAP
14626 and old hidden services, to indicate that they aren't suitable for
14627 new protocols or formats. Closes ticket 23026.
14628 - Replace our STRUCT_OFFSET() macro with offsetof(). Closes ticket
14629 22521. Patch from Neel Chauhan.
14630 - Split the enormous circuit_send_next_onion_skin() function into
14631 multiple subfunctions. Closes ticket 22804.
14632 - Split the portions of the buffer.c module that handle particular
14633 protocols into separate modules. Part of ticket 23149.
14634 - Use our test macros more consistently, to produce more useful
14635 error messages when our unit tests fail. Add coccinelle patches to
14636 allow us to re-check for test macro uses. Closes ticket 22497.
14638 o Deprecated features:
14639 - Deprecate HTTPProxy/HTTPProxyAuthenticator config options. They
14640 only applies to direct unencrypted HTTP connections to your
14641 directory server, which your Tor probably isn't using. Closes
14645 - Clarify in the manual that "Sandbox 1" is only supported on Linux
14646 kernels. Closes ticket 22677.
14647 - Document all values of PublishServerDescriptor in the manpage.
14648 Closes ticket 15645.
14649 - Improve the documentation for the directory port part of the
14650 DirAuthority line. Closes ticket 20152.
14651 - Restore documentation for the authorities' "approved-routers"
14652 file. Closes ticket 21148.
14654 o Removed features:
14655 - The AllowDotExit option has been removed as unsafe. It has been
14656 deprecated since 0.2.9.2-alpha. Closes ticket 23426.
14657 - The ClientDNSRejectInternalAddresses flag can no longer be set on
14658 non-testing networks. It has been deprecated since 0.2.9.2-alpha.
14659 Closes ticket 21031.
14660 - The controller API no longer includes an AUTHDIR_NEWDESCS event:
14661 nobody was using it any longer. Closes ticket 22377.
14664 Changes in version 0.2.8.15 - 2017-09-18
14665 Tor 0.2.8.15 backports a collection of bugfixes from later
14668 Most significantly, it includes a fix for TROVE-2017-008, a
14669 security bug that affects hidden services running with the
14670 SafeLogging option disabled. For more information, see
14671 https://trac.torproject.org/projects/tor/ticket/23490
14673 Note that Tor 0.2.8.x will no longer be supported after 1 Jan
14674 2018. We suggest that you upgrade to the latest stable release if
14675 possible. If you can't, we recommend that you upgrade at least to
14676 0.2.9, which will be supported until 2020.
14678 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
14679 - Avoid an assertion failure bug affecting our implementation of
14680 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14681 handling of "0xx" differs from what we had expected. Fixes bug
14682 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14685 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14688 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
14689 - Backport a fix for an "unused variable" warning that appeared
14690 in some versions of mingw. Fixes bug 22838; bugfix on
14693 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
14694 - Fix a memset() off the end of an array when packing cells. This
14695 bug should be harmless in practice, since the corrupted bytes are
14696 still in the same structure, and are always padding bytes,
14697 ignored, or immediately overwritten, depending on compiler
14698 behavior. Nevertheless, because the memset()'s purpose is to make
14699 sure that any other cell-handling bugs can't expose bytes to the
14700 network, we need to fix it. Fixes bug 22737; bugfix on
14701 0.2.4.11-alpha. Fixes CID 1401591.
14703 o Build features (backport from 0.3.1.5-alpha):
14704 - Tor's repository now includes a Travis Continuous Integration (CI)
14705 configuration file (.travis.yml). This is meant to help new
14706 developers and contributors who fork Tor to a Github repository be
14707 better able to test their changes, and understand what we expect
14708 to pass. To use this new build feature, you must fork Tor to your
14709 Github account, then go into the "Integrations" menu in the
14710 repository settings for your fork and enable Travis, then push
14711 your changes. Closes ticket 22636.
14714 Changes in version 0.2.9.12 - 2017-09-18
14715 Tor 0.2.9.12 backports a collection of bugfixes from later
14718 Most significantly, it includes a fix for TROVE-2017-008, a
14719 security bug that affects hidden services running with the
14720 SafeLogging option disabled. For more information, see
14721 https://trac.torproject.org/projects/tor/ticket/23490
14723 o Major features (security, backport from 0.3.0.2-alpha):
14724 - Change the algorithm used to decide DNS TTLs on client and server
14725 side, to better resist DNS-based correlation attacks like the
14726 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
14727 Feamster. Now relays only return one of two possible DNS TTL
14728 values, and clients are willing to believe DNS TTL values up to 3
14729 hours long. Closes ticket 19769.
14731 o Major bugfixes (crash, directory connections, backport from 0.3.0.5-rc):
14732 - Fix a rare crash when sending a begin cell on a circuit whose
14733 linked directory connection had already been closed. Fixes bug
14734 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
14736 o Major bugfixes (DNS, backport from 0.3.0.2-alpha):
14737 - Fix a bug that prevented exit nodes from caching DNS records for
14738 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
14740 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
14741 - Fix a typo that had prevented TPROXY-based transparent proxying
14742 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
14743 Patch from "d4fq0fQAgoJ".
14745 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
14746 - Avoid an assertion failure bug affecting our implementation of
14747 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14748 handling of "0xx" differs from what we had expected. Fixes bug
14749 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14751 o Minor features (code style, backport from 0.3.1.3-alpha):
14752 - Add "Falls through" comments to our codebase, in order to silence
14753 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
14754 Stieger. Closes ticket 22446.
14756 o Minor features (geoip):
14757 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14760 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.1-alpha):
14761 - Roll over monthly accounting at the configured hour and minute,
14762 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
14763 Found by Andrey Karpov with PVS-Studio.
14765 o Minor bugfixes (compilation, backport from 0.3.1.5-alpha):
14766 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
14767 bugfix on 0.2.8.1-alpha.
14768 - Fix warnings when building with libscrypt and openssl scrypt support
14769 on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
14770 - When building with certain versions the mingw C header files, avoid
14771 float-conversion warnings when calling the C functions isfinite(),
14772 isnan(), and signbit(). Fixes bug 22801; bugfix on 0.2.8.1-alpha.
14774 o Minor bugfixes (compilation, backport from 0.3.1.7):
14775 - Avoid compiler warnings in the unit tests for running tor_sscanf()
14776 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
14778 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
14779 - Backport a fix for an "unused variable" warning that appeared
14780 in some versions of mingw. Fixes bug 22838; bugfix on
14783 o Minor bugfixes (controller, backport from 0.3.1.7):
14784 - Do not crash when receiving a HSPOST command with an empty body.
14785 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
14786 - Do not crash when receiving a POSTDESCRIPTOR command with an
14787 empty body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
14789 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
14790 - Avoid Coverity build warnings related to our BUG() macro. By
14791 default, Coverity treats BUG() as the Linux kernel does: an
14792 instant abort(). We need to override that so our BUG() macro
14793 doesn't prevent Coverity from analyzing functions that use it.
14794 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
14796 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
14797 - Fix a memset() off the end of an array when packing cells. This
14798 bug should be harmless in practice, since the corrupted bytes are
14799 still in the same structure, and are always padding bytes,
14800 ignored, or immediately overwritten, depending on compiler
14801 behavior. Nevertheless, because the memset()'s purpose is to make
14802 sure that any other cell-handling bugs can't expose bytes to the
14803 network, we need to fix it. Fixes bug 22737; bugfix on
14804 0.2.4.11-alpha. Fixes CID 1401591.
14806 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
14807 - When setting the maximum number of connections allowed by the OS,
14808 always allow some extra file descriptors for other files. Fixes
14809 bug 22797; bugfix on 0.2.0.10-alpha.
14811 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
14812 - Avoid a sandbox failure when trying to re-bind to a socket and
14813 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
14815 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
14816 - Permit the fchmod system call, to avoid crashing on startup when
14817 starting with the seccomp2 sandbox and an unexpected set of
14818 permissions on the data directory or its contents. Fixes bug
14819 22516; bugfix on 0.2.5.4-alpha.
14821 o Minor bugfixes (relay, backport from 0.3.0.5-rc):
14822 - Avoid a double-marked-circuit warning that could happen when we
14823 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
14826 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
14827 - Reject version numbers with non-numeric prefixes (such as +, -, or
14828 whitespace). Disallowing whitespace prevents differential version
14829 parsing between POSIX-based and Windows platforms. Fixes bug 21507
14830 and part of 21508; bugfix on 0.0.8pre1.
14832 o Build features (backport from 0.3.1.5-alpha):
14833 - Tor's repository now includes a Travis Continuous Integration (CI)
14834 configuration file (.travis.yml). This is meant to help new
14835 developers and contributors who fork Tor to a Github repository be
14836 better able to test their changes, and understand what we expect
14837 to pass. To use this new build feature, you must fork Tor to your
14838 Github account, then go into the "Integrations" menu in the
14839 repository settings for your fork and enable Travis, then push
14840 your changes. Closes ticket 22636.
14843 Changes in version 0.3.0.11 - 2017-09-18
14844 Tor 0.3.0.11 backports a collection of bugfixes from Tor the 0.3.1
14847 Most significantly, it includes a fix for TROVE-2017-008, a
14848 security bug that affects hidden services running with the
14849 SafeLogging option disabled. For more information, see
14850 https://trac.torproject.org/projects/tor/ticket/23490
14852 o Minor features (code style, backport from 0.3.1.7):
14853 - Add "Falls through" comments to our codebase, in order to silence
14854 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
14855 Stieger. Closes ticket 22446.
14858 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14861 o Minor bugfixes (compilation, backport from 0.3.1.7):
14862 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
14863 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
14865 o Minor bugfixes (controller, backport from 0.3.1.7):
14866 - Do not crash when receiving a HSPOST command with an empty body.
14867 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
14868 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
14869 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
14871 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
14872 - When setting the maximum number of connections allowed by the OS,
14873 always allow some extra file descriptors for other files. Fixes
14874 bug 22797; bugfix on 0.2.0.10-alpha.
14876 o Minor bugfixes (logging, relay, backport from 0.3.1.6-rc):
14877 - Remove a forgotten debugging message when an introduction point
14878 successfully establishes a hidden service prop224 circuit with
14880 - Change three other log_warn() for an introduction point to
14881 protocol warnings, because they can be failure from the network
14882 and are not relevant to the operator. Fixes bug 23078; bugfix on
14883 0.3.0.1-alpha and 0.3.0.2-alpha.
14886 Changes in version 0.3.1.7 - 2017-09-18
14887 Tor 0.3.1.7 is the first stable release in the 0.3.1 series.
14889 With the 0.3.1 series, Tor now serves and downloads directory
14890 information in more compact formats, to save on bandwidth overhead. It
14891 also contains a new padding system to resist netflow-based traffic
14892 analysis, and experimental support for building parts of Tor in Rust
14893 (though no parts of Tor are in Rust yet). There are also numerous
14894 small features, bugfixes on earlier release series, and groundwork for
14895 the hidden services revamp of 0.3.2.
14897 This release also includes a fix for TROVE-2017-008, a security bug
14898 that affects hidden services running with the SafeLogging option
14899 disabled. For more information, see
14900 https://trac.torproject.org/projects/tor/ticket/23490
14902 Per our stable release policy, we plan to support each stable release
14903 series for at least the next nine months, or for three months after
14904 the first stable release of the next series: whichever is longer. If
14905 you need a release with long-term support, we recommend that you stay
14906 with the 0.2.9 series.
14908 Below is a list of the changes since 0.3.1.6-rc. For a list of all
14909 changes since 0.3.0, see the ReleaseNotes file.
14911 o Major bugfixes (security, hidden services, loggging):
14912 - Fix a bug where we could log uninitialized stack when a certain
14913 hidden service error occurred while SafeLogging was disabled.
14914 Fixes bug #23490; bugfix on 0.2.7.2-alpha. This is also tracked as
14915 TROVE-2017-008 and CVE-2017-0380.
14917 o Minor features (defensive programming):
14918 - Create a pair of consensus parameters, nf_pad_tor2web and
14919 nf_pad_single_onion, to disable netflow padding in the consensus
14920 for non-anonymous connections in case the overhead is high. Closes
14923 o Minor features (diagnostic):
14924 - Add a stack trace to the bug warnings that can be logged when
14925 trying to send an outgoing relay cell with n_chan == 0. Diagnostic
14926 attempt for bug 23105.
14928 o Minor features (geoip):
14929 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14932 o Minor bugfixes (compilation):
14933 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
14934 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
14936 o Minor bugfixes (controller):
14937 - Do not crash when receiving a HSPOST command with an empty body.
14938 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
14939 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
14940 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
14942 o Minor bugfixes (relay):
14943 - Inform the geoip and rephist modules about all requests, even on
14944 relays that are only fetching microdescriptors. Fixes a bug
14945 related to 21585; bugfix on 0.3.0.1-alpha.
14947 o Minor bugfixes (unit tests):
14948 - Fix a channelpadding unit test failure on slow systems by using
14949 mocked time instead of actual time. Fixes bug 23077; bugfix
14953 Changes in version 0.3.1.6-rc - 2017-09-05
14954 Tor 0.3.1.6-rc fixes a few small bugs and annoyances in the 0.3.1
14955 release series, including a bug that produced weird behavior on
14956 Windows directory caches.
14958 This is the first release candidate in the Tor 0.3.1 series. If we
14959 find no new bugs or regressions here, the first stable 0.3.1 release
14960 will be nearly identical to it.
14962 o Major bugfixes (windows, directory cache):
14963 - On Windows, do not try to delete cached consensus documents and
14964 diffs before they are unmapped from memory--Windows won't allow
14965 that. Instead, allow the consensus cache directory to grow larger,
14966 to hold files that might need to stay around longer. Fixes bug
14967 22752; bugfix on 0.3.1.1-alpha.
14969 o Minor features (directory authority):
14970 - Improve the message that authorities report to relays that present
14971 RSA/Ed25519 keypairs that conflict with previously pinned keys.
14972 Closes ticket 22348.
14974 o Minor features (geoip):
14975 - Update geoip and geoip6 to the August 3 2017 Maxmind GeoLite2
14978 o Minor features (testing):
14979 - Add more tests for compression backend initialization. Closes
14982 o Minor bugfixes (directory cache):
14983 - Fix a memory leak when recovering space in the consensus cache.
14984 Fixes bug 23139; bugfix on 0.3.1.1-alpha.
14986 o Minor bugfixes (hidden service):
14987 - Increase the number of circuits that a service is allowed to
14988 open over a specific period of time. The value was lower than it
14989 should be (8 vs 12) in the normal case of 3 introduction points.
14990 Fixes bug 22159; bugfix on 0.3.0.5-rc.
14991 - Fix a BUG warning during HSv3 descriptor decoding that could be
14992 cause by a specially crafted descriptor. Fixes bug 23233; bugfix
14993 on 0.3.0.1-alpha. Bug found by "haxxpop".
14994 - Rate-limit the log messages if we exceed the maximum number of
14995 allowed intro circuits. Fixes bug 22159; bugfix on 0.3.1.1-alpha.
14997 o Minor bugfixes (logging, relay):
14998 - Remove a forgotten debugging message when an introduction point
14999 successfully establishes a hidden service prop224 circuit with
15001 - Change three other log_warn() for an introduction point to
15002 protocol warnings, because they can be failure from the network
15003 and are not relevant to the operator. Fixes bug 23078; bugfix on
15004 0.3.0.1-alpha and 0.3.0.2-alpha.
15006 o Minor bugfixes (relay):
15007 - When a relay is not running as a directory cache, it will no
15008 longer generate compressed consensuses and consensus diff
15009 information. Previously, this was a waste of disk and CPU. Fixes
15010 bug 23275; bugfix on 0.3.1.1-alpha.
15012 o Minor bugfixes (robustness, error handling):
15013 - Improve our handling of the cases where OpenSSL encounters a
15014 memory error while encoding keys and certificates. We haven't
15015 observed these errors in the wild, but if they do happen, we now
15016 detect and respond better. Fixes bug 19418; bugfix on all versions
15017 of Tor. Reported by Guido Vranken.
15019 o Minor bugfixes (stability):
15020 - Avoid crashing on a double-free when unable to load or process an
15021 included file. Fixes bug 23155; bugfix on 0.3.1.1-alpha. Found
15022 with the clang static analyzer.
15024 o Minor bugfixes (testing):
15025 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
15026 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
15027 - Port the hs_ntor handshake test to work correctly with recent
15028 versions of the pysha3 module. Fixes bug 23071; bugfix
15031 o Minor bugfixes (Windows service):
15032 - When running as a Windows service, set the ID of the main thread
15033 correctly. Failure to do so made us fail to send log messages to
15034 the controller in 0.2.1.16-rc, slowed down controller event
15035 delivery in 0.2.7.3-rc and later, and crash with an assertion
15036 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
15037 Patch and diagnosis from "Vort".
15040 Changes in version 0.3.0.10 - 2017-08-02
15041 Tor 0.3.0.10 backports a collection of small-to-medium bugfixes
15042 from the current Tor alpha series. OpenBSD users and TPROXY users
15043 should upgrade; others are probably okay sticking with 0.3.0.9.
15045 o Major features (build system, continuous integration, backport from 0.3.1.5-alpha):
15046 - Tor's repository now includes a Travis Continuous Integration (CI)
15047 configuration file (.travis.yml). This is meant to help new
15048 developers and contributors who fork Tor to a Github repository be
15049 better able to test their changes, and understand what we expect
15050 to pass. To use this new build feature, you must fork Tor to your
15051 Github account, then go into the "Integrations" menu in the
15052 repository settings for your fork and enable Travis, then push
15053 your changes. Closes ticket 22636.
15055 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
15056 - Fix a typo that had prevented TPROXY-based transparent proxying
15057 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
15058 Patch from "d4fq0fQAgoJ".
15060 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
15061 - Avoid an assertion failure bug affecting our implementation of
15062 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
15063 handling of "0xbar" differs from what we had expected. Fixes bug
15064 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
15066 o Minor features (backport from 0.3.1.5-alpha):
15067 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
15070 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.2-alpha):
15071 - Roll over monthly accounting at the configured hour and minute,
15072 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
15073 Found by Andrey Karpov with PVS-Studio.
15075 o Minor bugfixes (compilation warnings, backport from 0.3.1.5-alpha):
15076 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
15077 bugfix on 0.2.8.1-alpha.
15078 - Fix warnings when building with libscrypt and openssl scrypt
15079 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
15080 - When building with certain versions of the mingw C header files,
15081 avoid float-conversion warnings when calling the C functions
15082 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
15085 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
15086 - Backport a fix for an "unused variable" warning that appeared
15087 in some versions of mingw. Fixes bug 22838; bugfix on
15090 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
15091 - Avoid Coverity build warnings related to our BUG() macro. By
15092 default, Coverity treats BUG() as the Linux kernel does: an
15093 instant abort(). We need to override that so our BUG() macro
15094 doesn't prevent Coverity from analyzing functions that use it.
15095 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
15097 o Minor bugfixes (directory authority, backport from 0.3.1.1-alpha):
15098 - When rejecting a router descriptor for running an obsolete version
15099 of Tor without ntor support, warn about the obsolete tor version,
15100 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
15102 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
15103 - Avoid a sandbox failure when trying to re-bind to a socket and
15104 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
15106 o Minor bugfixes (unit tests, backport from 0.3.1.5-alpha)
15107 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
15108 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
15111 Changes in version 0.3.1.5-alpha - 2017-08-01
15112 Tor 0.3.1.5-alpha improves the performance of consensus diff
15113 calculation, fixes a crash bug on older versions of OpenBSD, and fixes
15114 several other bugs. If no serious bugs are found in this version, the
15115 next version will be a release candidate.
15117 This release also marks the end of support for the Tor 0.2.4.x,
15118 0.2.6.x, and 0.2.7.x release series. Those releases will receive no
15119 further bug or security fixes. Anyone still running or distributing
15120 one of those versions should upgrade.
15122 o Major features (build system, continuous integration):
15123 - Tor's repository now includes a Travis Continuous Integration (CI)
15124 configuration file (.travis.yml). This is meant to help new
15125 developers and contributors who fork Tor to a Github repository be
15126 better able to test their changes, and understand what we expect
15127 to pass. To use this new build feature, you must fork Tor to your
15128 Github account, then go into the "Integrations" menu in the
15129 repository settings for your fork and enable Travis, then push
15130 your changes. Closes ticket 22636.
15132 o Major bugfixes (openbsd, denial-of-service):
15133 - Avoid an assertion failure bug affecting our implementation of
15134 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
15135 handling of "0xbar" differs from what we had expected. Fixes bug
15136 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
15138 o Major bugfixes (relay, performance):
15139 - Perform circuit handshake operations at a higher priority than we
15140 use for consensus diff creation and compression. This should
15141 prevent circuits from starving when a relay or bridge receives a
15142 new consensus, especially on lower-powered machines. Fixes bug
15143 22883; bugfix on 0.3.1.1-alpha.
15145 o Minor features (bridge authority):
15146 - Add "fingerprint" lines to the networkstatus-bridges file produced
15147 by bridge authorities. Closes ticket 22207.
15149 o Minor features (directory cache, consensus diff):
15150 - Add a new MaxConsensusAgeForDiffs option to allow directory cache
15151 operators with low-resource environments to adjust the number of
15152 consensuses they'll store and generate diffs from. Most cache
15153 operators should leave it unchanged. Helps to work around
15156 o Minor features (geoip):
15157 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
15160 o Minor features (relay, performance):
15161 - Always start relays with at least two worker threads, to prevent
15162 priority inversion on slow tasks. Part of the fix for bug 22883.
15163 - Allow background work to be queued with different priorities, so
15164 that a big pile of slow low-priority jobs will not starve out
15165 higher priority jobs. This lays the groundwork for a fix for
15168 o Minor bugfixes (build system, rust):
15169 - Fix a problem where Rust toolchains were not being found when
15170 building without --enable-cargo-online-mode, due to setting the
15171 $HOME environment variable instead of $CARGO_HOME. Fixes bug
15172 22830; bugfix on 0.3.1.1-alpha. Fix by Chelsea Komlo.
15174 o Minor bugfixes (compatibility, zstd):
15175 - Write zstd epilogues correctly when the epilogue requires
15176 reallocation of the output buffer, even with zstd 1.3.0.
15177 (Previously, we worked on 1.2.0 and failed with 1.3.0). Fixes bug
15178 22927; bugfix on 0.3.1.1-alpha.
15180 o Minor bugfixes (compilation warnings):
15181 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug
15182 22915; bugfix on 0.2.8.1-alpha.
15183 - Fix warnings when building with libscrypt and openssl scrypt
15184 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
15185 - Compile correctly when both openssl 1.1.0 and libscrypt are
15186 detected. Previously this would cause an error. Fixes bug 22892;
15187 bugfix on 0.3.1.1-alpha.
15188 - When building with certain versions of the mingw C header files,
15189 avoid float-conversion warnings when calling the C functions
15190 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
15193 o Minor bugfixes (coverity build support):
15194 - Avoid Coverity build warnings related to our BUG() macro. By
15195 default, Coverity treats BUG() as the Linux kernel does: an
15196 instant abort(). We need to override that so our BUG() macro
15197 doesn't prevent Coverity from analyzing functions that use it.
15198 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
15200 o Minor bugfixes (directory authority):
15201 - When a directory authority rejects a descriptor or extrainfo with
15202 a given digest, mark that digest as undownloadable, so that we do
15203 not attempt to download it again over and over. We previously
15204 tried to avoid downloading such descriptors by other means, but we
15205 didn't notice if we accidentally downloaded one anyway. This
15206 behavior became problematic in 0.2.7.2-alpha, when authorities
15207 began pinning Ed25519 keys. Fixes bug 22349; bugfix
15210 o Minor bugfixes (error reporting, windows):
15211 - When formatting Windows error messages, use the English format to
15212 avoid codepage issues. Fixes bug 22520; bugfix on 0.1.2.8-alpha.
15215 o Minor bugfixes (file limits, osx):
15216 - When setting the maximum number of connections allowed by the OS,
15217 always allow some extra file descriptors for other files. Fixes
15218 bug 22797; bugfix on 0.2.0.10-alpha.
15220 o Minor bugfixes (linux seccomp2 sandbox):
15221 - Avoid a sandbox failure when trying to re-bind to a socket and
15222 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
15224 o Minor bugfixes (memory leaks):
15225 - Fix a small memory leak when validating a configuration that uses
15226 two or more AF_UNIX sockets for the same port type. Fixes bug
15227 23053; bugfix on 0.2.6.3-alpha. This is CID 1415725.
15229 o Minor bugfixes (unit tests):
15230 - test_consdiff_base64cmp would fail on OS X because while OS X
15231 follows the standard of (less than zero/zero/greater than zero),
15232 it doesn't follow the convention of (-1/0/+1). Make the test
15233 comply with the standard. Fixes bug 22870; bugfix on 0.3.1.1-alpha.
15234 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
15235 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
15238 Changes in version 0.3.1.4-alpha - 2017-06-29
15239 Tor 0.3.1.4-alpha fixes a path selection bug that would allow a client
15240 to use a guard that was in the same network family as a chosen exit
15241 relay. This is a security regression; all clients running earlier
15242 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9
15245 This release also fixes several other bugs introduced in 0.3.0.x
15246 and 0.3.1.x, including others that can affect bandwidth usage
15249 o New dependencies:
15250 - To build with zstd and lzma support, Tor now requires the
15251 pkg-config tool at build time. (This requirement was new in
15252 0.3.1.1-alpha, but was not noted at the time. Noting it here to
15253 close ticket 22623.)
15255 o Major bugfixes (path selection, security):
15256 - When choosing which guard to use for a circuit, avoid the exit's
15257 family along with the exit itself. Previously, the new guard
15258 selection logic avoided the exit, but did not consider its family.
15259 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
15260 006 and CVE-2017-0377.
15262 o Major bugfixes (compression, zstd):
15263 - Correctly detect a full buffer when decompressing a large zstd-
15264 compressed input. Previously, we would sometimes treat a full
15265 buffer as an error. Fixes bug 22628; bugfix on 0.3.1.1-alpha.
15267 o Major bugfixes (directory protocol):
15268 - Ensure that we send "304 Not modified" as HTTP status code when a
15269 client is attempting to fetch a consensus or consensus diff, and
15270 the best one we can send them is one they already have. Fixes bug
15271 22702; bugfix on 0.3.1.1-alpha.
15273 o Major bugfixes (entry guards):
15274 - When starting with an old consensus, do not add new entry guards
15275 unless the consensus is "reasonably live" (under 1 day old). Fixes
15276 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
15278 o Minor features (bug mitigation, diagnostics, logging):
15279 - Avoid an assertion failure, and log a better error message, when
15280 unable to remove a file from the consensus cache on Windows.
15281 Attempts to mitigate and diagnose bug 22752.
15283 o Minor features (geoip):
15284 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
15287 o Minor bugfixes (compression):
15288 - When compressing or decompressing a buffer, check for a failure to
15289 create a compression object. Fixes bug 22626; bugfix
15291 - When decompressing a buffer, check for extra data after the end of
15292 the compressed data. Fixes bug 22629; bugfix on 0.3.1.1-alpha.
15293 - When decompressing an object received over an anonymous directory
15294 connection, if we have already decompressed it using an acceptable
15295 compression method, do not reject it for looking like an
15296 unacceptable compression method. Fixes part of bug 22670; bugfix
15298 - When serving directory votes compressed with zlib, do not claim to
15299 have compressed them with zstd. Fixes bug 22669; bugfix
15301 - When spooling compressed data to an output buffer, don't try to
15302 spool more data when there is no more data to spool and we are not
15303 trying to flush the input. Previously, we would sometimes launch
15304 compression requests with nothing to do, which interferes with our
15305 22672 checks. Fixes bug 22719; bugfix on 0.2.0.16-alpha.
15307 o Minor bugfixes (defensive programming):
15308 - Detect and break out of infinite loops in our compression code. We
15309 don't think that any such loops exist now, but it's best to be
15310 safe. Closes ticket 22672.
15311 - Fix a memset() off the end of an array when packing cells. This
15312 bug should be harmless in practice, since the corrupted bytes are
15313 still in the same structure, and are always padding bytes,
15314 ignored, or immediately overwritten, depending on compiler
15315 behavior. Nevertheless, because the memset()'s purpose is to make
15316 sure that any other cell-handling bugs can't expose bytes to the
15317 network, we need to fix it. Fixes bug 22737; bugfix on
15318 0.2.4.11-alpha. Fixes CID 1401591.
15320 o Minor bugfixes (linux seccomp2 sandbox):
15321 - Permit the fchmod system call, to avoid crashing on startup when
15322 starting with the seccomp2 sandbox and an unexpected set of
15323 permissions on the data directory or its contents. Fixes bug
15324 22516; bugfix on 0.2.5.4-alpha.
15325 - Fix a crash in the LZMA module, when the sandbox was enabled, and
15326 liblzma would allocate more than 16 MB of memory. We solve this by
15327 bumping the mprotect() limit in the sandbox module from 16 MB to
15328 20 MB. Fixes bug 22751; bugfix on 0.3.1.1-alpha.
15330 o Minor bugfixes (logging):
15331 - When decompressing, do not warn if we fail to decompress using a
15332 compression method that we merely guessed. Fixes part of bug
15333 22670; bugfix on 0.1.1.14-alpha.
15334 - When decompressing, treat mismatch between content-encoding and
15335 actual compression type as a protocol warning. Fixes part of bug
15336 22670; bugfix on 0.1.1.9-alpha.
15337 - Downgrade "assigned_to_cpuworker failed" message to info-level
15338 severity. In every case that can reach it, either a better warning
15339 has already been logged, or no warning is warranted. Fixes bug
15340 22356; bugfix on 0.2.6.3-alpha.
15341 - Demote a warn that was caused by libevent delays to info if
15342 netflow padding is less than 4.5 seconds late, or to notice
15343 if it is more (4.5 seconds is the amount of time that a netflow
15344 record might be emitted after, if we chose the maximum timeout).
15345 Fixes bug 22212; bugfix on 0.3.1.1-alpha.
15347 o Minor bugfixes (process behavior):
15348 - When exiting because of an error, always exit with a nonzero exit
15349 status. Previously, we would fail to report an error in our exit
15350 status in cases related to __OwningControllerProcess failure,
15351 lockfile contention, and Ed25519 key initialization. Fixes bug
15352 22720; bugfix on versions 0.2.1.6-alpha, 0.2.2.28-beta, and
15353 0.2.7.2-alpha respectively. Reported by "f55jwk4f"; patch
15357 - Add a manpage description for the key-pinning-journal file. Closes
15359 - Correctly note that bandwidth accounting values are stored in the
15360 state file, and the bw_accounting file is now obsolete. Closes
15362 - Document more of the files in the Tor data directory, including
15363 cached-extrainfo, secret_onion_key{,_ntor}.old, hidserv-stats,
15364 approved-routers, sr-random, and diff-cache. Found while fixing
15368 Changes in version 0.3.0.9 - 2017-06-29
15369 Tor 0.3.0.9 fixes a path selection bug that would allow a client
15370 to use a guard that was in the same network family as a chosen exit
15371 relay. This is a security regression; all clients running earlier
15372 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9 or
15375 This release also backports several other bugfixes from the 0.3.1.x
15378 o Major bugfixes (path selection, security, backport from 0.3.1.4-alpha):
15379 - When choosing which guard to use for a circuit, avoid the exit's
15380 family along with the exit itself. Previously, the new guard
15381 selection logic avoided the exit, but did not consider its family.
15382 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
15383 006 and CVE-2017-0377.
15385 o Major bugfixes (entry guards, backport from 0.3.1.1-alpha):
15386 - Don't block bootstrapping when a primary bridge is offline and we
15387 can't get its descriptor. Fixes bug 22325; fixes one case of bug
15388 21969; bugfix on 0.3.0.3-alpha.
15390 o Major bugfixes (entry guards, backport from 0.3.1.4-alpha):
15391 - When starting with an old consensus, do not add new entry guards
15392 unless the consensus is "reasonably live" (under 1 day old). Fixes
15393 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
15395 o Minor features (geoip):
15396 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
15399 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
15400 - Reject version numbers with non-numeric prefixes (such as +, -, or
15401 whitespace). Disallowing whitespace prevents differential version
15402 parsing between POSIX-based and Windows platforms. Fixes bug 21507
15403 and part of 21508; bugfix on 0.0.8pre1.
15405 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
15406 - Permit the fchmod system call, to avoid crashing on startup when
15407 starting with the seccomp2 sandbox and an unexpected set of
15408 permissions on the data directory or its contents. Fixes bug
15409 22516; bugfix on 0.2.5.4-alpha.
15411 o Minor bugfixes (defensive programming, backport from 0.3.1.4-alpha):
15412 - Fix a memset() off the end of an array when packing cells. This
15413 bug should be harmless in practice, since the corrupted bytes are
15414 still in the same structure, and are always padding bytes,
15415 ignored, or immediately overwritten, depending on compiler
15416 behavior. Nevertheless, because the memset()'s purpose is to make
15417 sure that any other cell-handling bugs can't expose bytes to the
15418 network, we need to fix it. Fixes bug 22737; bugfix on
15419 0.2.4.11-alpha. Fixes CID 1401591.
15422 Changes in version 0.3.1.3-alpha - 2017-06-08
15423 Tor 0.3.1.3-alpha fixes a pair of bugs that would allow an attacker to
15424 remotely crash a hidden service with an assertion failure. Anyone
15425 running a hidden service should upgrade to this version, or to some
15426 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
15428 Tor 0.3.1.3-alpha also includes fixes for several key management bugs
15429 that sometimes made relays unreliable, as well as several other
15430 bugfixes described below.
15432 o Major bugfixes (hidden service, relay, security):
15433 - Fix a remotely triggerable assertion failure when a hidden service
15434 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
15435 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
15436 - Fix a remotely triggerable assertion failure caused by receiving a
15437 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15438 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15441 o Major bugfixes (relay, link handshake):
15442 - When performing the v3 link handshake on a TLS connection, report
15443 that we have the x509 certificate that we actually used on that
15444 connection, even if we have changed certificates since that
15445 connection was first opened. Previously, we would claim to have
15446 used our most recent x509 link certificate, which would sometimes
15447 make the link handshake fail. Fixes one case of bug 22460; bugfix
15450 o Major bugfixes (relays, key management):
15451 - Regenerate link and authentication certificates whenever the key
15452 that signs them changes; also, regenerate link certificates
15453 whenever the signed key changes. Previously, these processes were
15454 only weakly coupled, and we relays could (for minutes to hours)
15455 wind up with an inconsistent set of keys and certificates, which
15456 other relays would not accept. Fixes two cases of bug 22460;
15457 bugfix on 0.3.0.1-alpha.
15458 - When sending an Ed25519 signing->link certificate in a CERTS cell,
15459 send the certificate that matches the x509 certificate that we
15460 used on the TLS connection. Previously, there was a race condition
15461 if the TLS context rotated after we began the TLS handshake but
15462 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
15465 o Major bugfixes (torrc, crash):
15466 - Fix a crash bug when using %include in torrc. Fixes bug 22417;
15467 bugfix on 0.3.1.1-alpha. Patch by Daniel Pinto.
15469 o Minor features (code style):
15470 - Add "Falls through" comments to our codebase, in order to silence
15471 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
15472 Stieger. Closes ticket 22446.
15474 o Minor features (diagnostic):
15475 - Add logging messages to try to diagnose a rare bug that seems to
15476 generate RSA->Ed25519 cross-certificates dated in the 1970s. We
15477 think this is happening because of incorrect system clocks, but
15478 we'd like to know for certain. Diagnostic for bug 22466.
15480 o Minor bugfixes (correctness):
15481 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15482 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15484 o Minor bugfixes (directory protocol):
15485 - Check for libzstd >= 1.1, because older versions lack the
15486 necessary streaming API. Fixes bug 22413; bugfix on 0.3.1.1-alpha.
15488 o Minor bugfixes (link handshake):
15489 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
15490 months, and regenerate it when it is within one month of expiring.
15491 Previously, we had generated this certificate at startup with a
15492 ten-year lifetime, but that could lead to weird behavior when Tor
15493 was started with a grossly inaccurate clock. Mitigates bug 22466;
15494 mitigation on 0.3.0.1-alpha.
15496 o Minor bugfixes (storage directories):
15497 - Always check for underflows in the cached storage directory usage.
15498 If the usage does underflow, re-calculate it. Also, avoid a
15499 separate underflow when the usage is not known. Fixes bug 22424;
15500 bugfix on 0.3.1.1-alpha.
15502 o Minor bugfixes (unit tests):
15503 - The unit tests now pass on systems where localhost is misconfigured
15504 to some IPv4 address other than 127.0.0.1. Fixes bug 6298; bugfix
15508 - Clarify the manpage for the (deprecated) torify script. Closes
15511 Changes in version 0.3.0.8 - 2017-06-08
15512 Tor 0.3.0.8 fixes a pair of bugs that would allow an attacker to
15513 remotely crash a hidden service with an assertion failure. Anyone
15514 running a hidden service should upgrade to this version, or to some
15515 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
15517 Tor 0.3.0.8 also includes fixes for several key management bugs
15518 that sometimes made relays unreliable, as well as several other
15519 bugfixes described below.
15521 o Major bugfixes (hidden service, relay, security, backport
15522 from 0.3.1.3-alpha):
15523 - Fix a remotely triggerable assertion failure when a hidden service
15524 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
15525 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
15526 - Fix a remotely triggerable assertion failure caused by receiving a
15527 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15528 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15531 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
15532 - When performing the v3 link handshake on a TLS connection, report
15533 that we have the x509 certificate that we actually used on that
15534 connection, even if we have changed certificates since that
15535 connection was first opened. Previously, we would claim to have
15536 used our most recent x509 link certificate, which would sometimes
15537 make the link handshake fail. Fixes one case of bug 22460; bugfix
15540 o Major bugfixes (relays, key management, backport from 0.3.1.3-alpha):
15541 - Regenerate link and authentication certificates whenever the key
15542 that signs them changes; also, regenerate link certificates
15543 whenever the signed key changes. Previously, these processes were
15544 only weakly coupled, and we relays could (for minutes to hours)
15545 wind up with an inconsistent set of keys and certificates, which
15546 other relays would not accept. Fixes two cases of bug 22460;
15547 bugfix on 0.3.0.1-alpha.
15548 - When sending an Ed25519 signing->link certificate in a CERTS cell,
15549 send the certificate that matches the x509 certificate that we
15550 used on the TLS connection. Previously, there was a race condition
15551 if the TLS context rotated after we began the TLS handshake but
15552 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
15555 o Major bugfixes (hidden service v3, backport from 0.3.1.1-alpha):
15556 - Stop rejecting v3 hidden service descriptors because their size
15557 did not match an old padding rule. Fixes bug 22447; bugfix on
15560 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
15561 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15562 December 2016 (of which ~126 were still functional) with a list of
15563 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15564 2017. Resolves ticket 21564.
15566 o Minor bugfixes (configuration, backport from 0.3.1.1-alpha):
15567 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
15568 bug 22252; bugfix on 0.2.9.3-alpha.
15570 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
15571 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15572 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15574 o Minor bugfixes (link handshake, backport from 0.3.1.3-alpha):
15575 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
15576 months, and regenerate it when it is within one month of expiring.
15577 Previously, we had generated this certificate at startup with a
15578 ten-year lifetime, but that could lead to weird behavior when Tor
15579 was started with a grossly inaccurate clock. Mitigates bug 22466;
15580 mitigation on 0.3.0.1-alpha.
15582 o Minor bugfixes (memory leak, directory authority, backport from
15584 - When directory authorities reject a router descriptor due to
15585 keypinning, free the router descriptor rather than leaking the
15586 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
15589 Changes in version 0.2.9.11 - 2017-06-08
15590 Tor 0.2.9.11 backports a fix for a bug that would allow an attacker to
15591 remotely crash a hidden service with an assertion failure. Anyone
15592 running a hidden service should upgrade to this version, or to some
15593 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15594 are not affected by TROVE-2017-004.)
15596 Tor 0.2.9.11 also backports fixes for several key management bugs
15597 that sometimes made relays unreliable, as well as several other
15598 bugfixes described below.
15600 o Major bugfixes (hidden service, relay, security, backport
15601 from 0.3.1.3-alpha):
15602 - Fix a remotely triggerable assertion failure caused by receiving a
15603 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15604 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15607 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
15608 - When performing the v3 link handshake on a TLS connection, report
15609 that we have the x509 certificate that we actually used on that
15610 connection, even if we have changed certificates since that
15611 connection was first opened. Previously, we would claim to have
15612 used our most recent x509 link certificate, which would sometimes
15613 make the link handshake fail. Fixes one case of bug 22460; bugfix
15616 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
15617 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15618 December 2016 (of which ~126 were still functional) with a list of
15619 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15620 2017. Resolves ticket 21564.
15622 o Minor features (future-proofing, backport from 0.3.0.7):
15623 - Tor no longer refuses to download microdescriptors or descriptors if
15624 they are listed as "published in the future". This change will
15625 eventually allow us to stop listing meaningful "published" dates
15626 in microdescriptor consensuses, and thereby allow us to reduce the
15627 resources required to download consensus diffs by over 50%.
15628 Implements part of ticket 21642; implements part of proposal 275.
15630 o Minor features (directory authorities, backport from 0.3.0.4-rc)
15631 - Directory authorities now reject relays running versions
15632 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
15633 suffer from bug 20499 and don't keep their consensus cache
15634 up-to-date. Resolves ticket 20509.
15636 o Minor features (geoip):
15637 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15640 o Minor bugfixes (control port, backport from 0.3.0.6):
15641 - The GETINFO extra-info/digest/<digest> command was broken because
15642 of a wrong base16 decode return value check, introduced when
15643 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
15645 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
15646 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15647 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15649 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.0.7):
15650 - The getpid() system call is now permitted under the Linux seccomp2
15651 sandbox, to avoid crashing with versions of OpenSSL (and other
15652 libraries) that attempt to learn the process's PID by using the
15653 syscall rather than the VDSO code. Fixes bug 21943; bugfix
15656 o Minor bugfixes (memory leak, directory authority, backport
15657 from 0.3.1.2-alpha):
15658 - When directory authorities reject a router descriptor due to
15659 keypinning, free the router descriptor rather than leaking the
15660 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
15662 Changes in version 0.2.8.14 - 2017-06-08
15663 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
15664 remotely crash a hidden service with an assertion failure. Anyone
15665 running a hidden service should upgrade to this version, or to some
15666 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15667 are not affected by TROVE-2017-004.)
15669 o Major bugfixes (hidden service, relay, security):
15670 - Fix a remotely triggerable assertion failure caused by receiving a
15671 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15672 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15675 o Minor features (geoip):
15676 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15679 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
15680 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15681 December 2016 (of which ~126 were still functional) with a list of
15682 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15683 2017. Resolves ticket 21564.
15685 o Minor bugfixes (correctness):
15686 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15687 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15689 Changes in version 0.2.7.8 - 2017-06-08
15690 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
15691 remotely crash a hidden service with an assertion failure. Anyone
15692 running a hidden service should upgrade to this version, or to some
15693 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15694 are not affected by TROVE-2017-004.)
15696 o Major bugfixes (hidden service, relay, security):
15697 - Fix a remotely triggerable assertion failure caused by receiving a
15698 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15699 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15702 o Minor features (geoip):
15703 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15706 o Minor bugfixes (correctness):
15707 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15708 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15711 Changes in version 0.2.6.12 - 2017-06-08
15712 Tor 0.2.6.12 backports a fix for a bug that would allow an attacker to
15713 remotely crash a hidden service with an assertion failure. Anyone
15714 running a hidden service should upgrade to this version, or to some
15715 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15716 are not affected by TROVE-2017-004.)
15718 o Major bugfixes (hidden service, relay, security):
15719 - Fix a remotely triggerable assertion failure caused by receiving a
15720 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15721 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15724 o Minor features (geoip):
15725 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15728 o Minor bugfixes (correctness):
15729 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15730 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15732 Changes in version 0.2.5.14 - 2017-06-08
15733 Tor 0.2.5.14 backports a fix for a bug that would allow an attacker to
15734 remotely crash a hidden service with an assertion failure. Anyone
15735 running a hidden service should upgrade to this version, or to some
15736 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15737 are not affected by TROVE-2017-004.)
15739 o Major bugfixes (hidden service, relay, security):
15740 - Fix a remotely triggerable assertion failure caused by receiving a
15741 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15742 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15745 o Minor features (geoip):
15746 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15749 o Minor bugfixes (correctness):
15750 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15751 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15753 Changes in version 0.2.4.29 - 2017-06-08
15754 Tor 0.2.4.29 backports a fix for a bug that would allow an attacker to
15755 remotely crash a hidden service with an assertion failure. Anyone
15756 running a hidden service should upgrade to this version, or to some
15757 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15758 are not affected by TROVE-2017-004.)
15760 o Major bugfixes (hidden service, relay, security):
15761 - Fix a remotely triggerable assertion failure caused by receiving a
15762 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15763 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15766 o Minor features (geoip):
15767 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15770 o Minor bugfixes (correctness):
15771 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15772 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15775 Changes in version 0.3.1.2-alpha - 2017-05-26
15776 Tor 0.3.1.2-alpha is the second release in the 0.3.1.x series. It
15777 fixes a few bugs found while testing 0.3.1.1-alpha, including a
15778 memory corruption bug that affected relay stability.
15780 o Major bugfixes (crash, relay):
15781 - Fix a memory-corruption bug in relays that set MyFamily.
15782 Previously, they would double-free MyFamily elements when making
15783 the next descriptor or when changing their configuration. Fixes
15784 bug 22368; bugfix on 0.3.1.1-alpha.
15786 o Minor bugfixes (logging):
15787 - Log a better message when a directory authority replies to an
15788 upload with an unexpected status code. Fixes bug 11121; bugfix
15791 o Minor bugfixes (memory leak, directory authority):
15792 - When directory authorities reject a router descriptor due to
15793 keypinning, free the router descriptor rather than leaking the
15794 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
15797 Changes in version 0.3.1.1-alpha - 2017-05-22
15798 Tor 0.3.1.1-alpha is the first release in the 0.3.1.x series. It
15799 reduces the bandwidth usage for Tor's directory protocol, adds some
15800 basic padding to resist netflow-based traffic analysis and to serve as
15801 the basis of other padding in the future, and adds rust support to the
15804 It also contains numerous other small features and improvements to
15805 security, correctness, and performance.
15807 Below are the changes since 0.3.0.7.
15809 o Major features (directory protocol):
15810 - Tor relays and authorities can now serve clients an abbreviated
15811 version of the consensus document, containing only the changes
15812 since an older consensus document that the client holds. Clients
15813 now request these documents when available. When both client and
15814 server use this new protocol, they will use far less bandwidth (up
15815 to 94% less) to keep the client's consensus up-to-date. Implements
15816 proposal 140; closes ticket 13339. Based on work by Daniel Martí.
15817 - Tor can now compress directory traffic with lzma or with zstd
15818 compression algorithms, which can deliver better bandwidth
15819 performance. Because lzma is computationally expensive, it's only
15820 used for documents that can be compressed once and served many
15821 times. Support for these algorithms requires that tor is built
15822 with the libzstd and/or liblzma libraries available. Implements
15823 proposal 278; closes ticket 21662.
15824 - Relays now perform the more expensive compression operations, and
15825 consensus diff generation, in worker threads. This separation
15826 avoids delaying the main thread when a new consensus arrives.
15828 o Major features (experimental):
15829 - Tor can now build modules written in Rust. To turn this on, pass
15830 the "--enable-rust" flag to the configure script. It's not time to
15831 get excited yet: currently, there is no actual Rust functionality
15832 beyond some simple glue code, and a notice at startup to tell you
15833 that Rust is running. Still, we hope that programmers and
15834 packagers will try building Tor with Rust support, so that we can
15835 find issues and solve portability problems. Closes ticket 22106.
15837 o Major features (traffic analysis resistance):
15838 - Connections between clients and relays now send a padding cell in
15839 each direction every 1.5 to 9.5 seconds (tunable via consensus
15840 parameters). This padding will not resist specialized
15841 eavesdroppers, but it should be enough to make many ISPs' routine
15842 network flow logging less useful in traffic analysis against
15845 Padding is negotiated using Tor's link protocol, so both relays
15846 and clients must upgrade for this to take effect. Clients may
15847 still send padding despite the relay's version by setting
15848 ConnectionPadding 1 in torrc, and may disable padding by setting
15849 ConnectionPadding 0 in torrc. Padding may be minimized for mobile
15850 users with the torrc option ReducedConnectionPadding. Implements
15851 Proposal 251 and Section 2 of Proposal 254; closes ticket 16861.
15852 - Relays will publish 24 hour totals of padding and non-padding cell
15853 counts to their extra-info descriptors, unless PaddingStatistics 0
15854 is set in torrc. These 24 hour totals are also rounded to
15855 multiples of 10000.
15857 o Major bugfixes (connection usage):
15858 - We use NETINFO cells to try to determine if both relays involved
15859 in a connection will agree on the canonical status of that
15860 connection. We prefer the connections where this is the case for
15861 extend cells, and try to close connections where relays disagree
15862 on their canonical status early. Also, we now prefer the oldest
15863 valid connection for extend cells. These two changes should reduce
15864 the number of long-term connections that are kept open between
15865 relays. Fixes bug 17604; bugfix on 0.2.5.5-alpha.
15866 - Relays now log hourly statistics (look for
15867 "channel_check_for_duplicates" lines) on the total number of
15868 connections to other relays. If the number of connections per
15869 relay is unexpectedly large, this log message is at notice level.
15870 Otherwise it is at info.
15872 o Major bugfixes (entry guards):
15873 - Don't block bootstrapping when a primary bridge is offline and we
15874 can't get its descriptor. Fixes bug 22325; fixes one case of bug
15875 21969; bugfix on 0.3.0.3-alpha.
15877 o Major bugfixes (linux TPROXY support):
15878 - Fix a typo that had prevented TPROXY-based transparent proxying
15879 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
15880 Patch from "d4fq0fQAgoJ".
15882 o Minor features (security, windows):
15883 - Enable a couple of pieces of Windows hardening: one
15884 (HeapEnableTerminationOnCorruption) that has been on-by-default
15885 since Windows 8, and unavailable before Windows 7; and one
15886 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
15887 affect us, but shouldn't do any harm. Closes ticket 21953.
15889 o Minor features (config options):
15890 - Allow "%include" directives in torrc configuration files. These
15891 directives import the settings from other files, or from all the
15892 files in a directory. Closes ticket 1922. Code by Daniel Pinto.
15893 - Make SAVECONF return an error when overwriting a torrc that has
15894 includes. Using SAVECONF with the FORCE option will allow it to
15895 overwrite torrc even if includes are used. Related to ticket 1922.
15896 - Add "GETINFO config-can-saveconf" to tell controllers if SAVECONF
15897 will work without the FORCE option. Related to ticket 1922.
15899 o Minor features (controller):
15900 - Warn the first time that a controller requests data in the long-
15901 deprecated 'GETINFO network-status' format. Closes ticket 21703.
15903 o Minor features (defaults):
15904 - The default value for UseCreateFast is now 0: clients which
15905 haven't yet received a consensus document will now use a proper
15906 ntor handshake to talk to their directory servers whenever they
15907 can. Closes ticket 21407.
15908 - Onion key rotation and expiry intervals are now defined as a
15909 network consensus parameter, per proposal 274. The default
15910 lifetime of an onion key is increased from 7 to 28 days. Old onion
15911 keys will expire after 7 days by default. This change will make
15912 consensus diffs much smaller, and save significant bandwidth.
15913 Closes ticket 21641.
15915 o Minor features (fallback directory list):
15916 - Update the fallback directory mirror whitelist and blacklist based
15917 on operator emails. Closes task 21121.
15918 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15919 December 2016 (of which ~126 were still functional) with a list of
15920 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15921 2017. Resolves ticket 21564.
15923 o Minor features (hidden services, logging):
15924 - Log a message when a hidden service descriptor has fewer
15925 introduction points than specified in
15926 HiddenServiceNumIntroductionPoints. Closes tickets 21598.
15927 - Log a message when a hidden service reaches its introduction point
15928 circuit limit, and when that limit is reset. Follow up to ticket
15929 21594; closes ticket 21622.
15930 - Warn user if multiple entries in EntryNodes and at least one
15931 HiddenService are used together. Pinning EntryNodes along with a
15932 hidden service can be possibly harmful; for instance see ticket
15933 14917 or 21155. Closes ticket 21155.
15935 o Minor features (linux seccomp2 sandbox):
15936 - We now have a document storage backend compatible with the Linux
15937 seccomp2 sandbox. This backend is used for consensus documents and
15938 diffs between them; in the long term, we'd like to use it for
15939 unparseable directory material too. Closes ticket 21645
15940 - Increase the maximum allowed size passed to mprotect(PROT_WRITE)
15941 from 1MB to 16MB. This was necessary with the glibc allocator in
15942 order to allow worker threads to allocate more memory -- which in
15943 turn is necessary because of our new use of worker threads for
15944 compression. Closes ticket 22096.
15946 o Minor features (logging):
15947 - Log files are no longer created world-readable by default.
15948 (Previously, most distributors would store the logs in a non-
15949 world-readable location to prevent inappropriate access. This
15950 change is an extra precaution.) Closes ticket 21729; patch
15953 o Minor features (performance):
15954 - Our Keccak (SHA-3) implementation now accesses memory more
15955 efficiently, especially on little-endian systems. Closes
15957 - Add an O(1) implementation of channel_find_by_global_id(), to
15958 speed some controller functions.
15960 o Minor features (relay, configuration):
15961 - The MyFamily option may now be repeated as many times as desired,
15962 for relays that want to configure large families. Closes ticket
15963 4998; patch by Daniel Pinto.
15965 o Minor features (safety):
15966 - Add an explicit check to extrainfo_parse_entry_from_string() for
15967 NULL inputs. We don't believe this can actually happen, but it may
15968 help silence a warning from the Clang analyzer. Closes
15971 o Minor features (testing):
15972 - Add a "--disable-memory-sentinels" feature to help with fuzzing.
15973 When Tor is compiled with this option, we disable a number of
15974 redundant memory-safety failsafes that are intended to stop bugs
15975 from becoming security issues. This makes it easier to hunt for
15976 bugs that would be security issues without the failsafes turned
15977 on. Closes ticket 21439.
15978 - Add a general event-tracing instrumentation support to Tor. This
15979 subsystem will enable developers and researchers to add fine-
15980 grained instrumentation to their Tor instances, for use when
15981 examining Tor network performance issues. There are no trace
15982 events yet, and event-tracing is off by default unless enabled at
15983 compile time. Implements ticket 13802.
15984 - Improve our version parsing tests: add tests for typical version
15985 components, add tests for invalid versions, including numeric
15986 range and non-numeric prefixes. Unit tests 21278, 21450, and
15987 21507. Partially implements 21470.
15989 o Minor bugfixes (bandwidth accounting):
15990 - Roll over monthly accounting at the configured hour and minute,
15991 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
15992 Found by Andrey Karpov with PVS-Studio.
15994 o Minor bugfixes (code correctness):
15995 - Accurately identify client connections by their lack of peer
15996 authentication. This means that we bail out earlier if asked to
15997 extend to a client. Follow-up to 21407. Fixes bug 21406; bugfix
16000 o Minor bugfixes (configuration):
16001 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
16002 bug 22252; bugfix on 0.2.9.3-alpha.
16004 o Minor bugfixes (connection lifespan):
16005 - Allow more control over how long TLS connections are kept open:
16006 unify CircuitIdleTimeout and PredictedPortsRelevanceTime into a
16007 single option called CircuitsAvailableTimeout. Also, allow the
16008 consensus to control the default values for both this preference
16009 and the lifespan of relay-to-relay connections. Fixes bug 17592;
16010 bugfix on 0.2.5.5-alpha.
16011 - Increase the initial circuit build timeout testing frequency, to
16012 help ensure that ReducedConnectionPadding clients finish learning
16013 a timeout before their orconn would expire. The initial testing
16014 rate was set back in the days of TAP and before the Tor Browser
16015 updater, when we had to be much more careful about new clients
16016 making lots of circuits. With this change, a circuit build timeout
16017 is learned in about 15-20 minutes, instead of 100-120 minutes.
16019 o Minor bugfixes (controller):
16020 - GETINFO onions/current and onions/detached no longer respond with
16021 551 on empty lists. Fixes bug 21329; bugfix on 0.2.7.1-alpha.
16022 - Trigger HS descriptor events on the control port when the client
16023 fails to pick a hidden service directory for a hidden service.
16024 This can happen if all the hidden service directories are in
16025 ExcludeNodes, or they have all been queried within the last 15
16026 minutes. Fixes bug 22042; bugfix on 0.2.5.2-alpha.
16028 o Minor bugfixes (directory authority):
16029 - When rejecting a router descriptor for running an obsolete version
16030 of Tor without ntor support, warn about the obsolete tor version,
16031 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
16032 - Prevent the shared randomness subsystem from asserting when
16033 initialized by a bridge authority with an incomplete configuration
16034 file. Fixes bug 21586; bugfix on 0.2.9.8.
16036 o Minor bugfixes (exit-side DNS):
16037 - Fix an untriggerable assertion that checked the output of a
16038 libevent DNS error, so that the assertion actually behaves as
16039 expected. Fixes bug 22244; bugfix on 0.2.0.20-rc. Found by Andrey
16040 Karpov using PVS-Studio.
16042 o Minor bugfixes (fallback directories):
16043 - Make the usage example in updateFallbackDirs.py actually work, and
16044 explain what it does. Fixes bug 22270; bugfix on 0.3.0.3-alpha.
16045 - Decrease the guard flag average required to be a fallback. This
16046 allows us to keep relays that have their guard flag removed when
16047 they restart. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
16048 - Decrease the minimum number of fallbacks to 100. Fixes bug 20913;
16049 bugfix on 0.2.8.1-alpha.
16050 - Make sure fallback directory mirrors have the same address, port,
16051 and relay identity key for at least 30 days before they are
16052 selected. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
16054 o Minor bugfixes (hidden services):
16055 - Stop printing a cryptic warning when a hidden service gets a
16056 request to connect to a virtual port that it hasn't configured.
16057 Fixes bug 16706; bugfix on 0.2.6.3-alpha.
16058 - Simplify hidden service descriptor creation by using an existing
16059 flag to check if an introduction point is established. Fixes bug
16060 21599; bugfix on 0.2.7.2-alpha.
16062 o Minor bugfixes (memory leak):
16063 - Fix a small memory leak at exit from the backtrace handler code.
16064 Fixes bug 21788; bugfix on 0.2.5.2-alpha. Patch from Daniel Pinto.
16066 o Minor bugfixes (protocol, logging):
16067 - Downgrade a log statement about unexpected relay cells from "bug"
16068 to "protocol warning", because there is at least one use case
16069 where it can be triggered by a buggy tor implementation. Fixes bug
16070 21293; bugfix on 0.1.1.14-alpha.
16072 o Minor bugfixes (testing):
16073 - Use unbuffered I/O for utility functions around the
16074 process_handle_t type. This fixes unit test failures reported on
16075 OpenBSD and FreeBSD. Fixes bug 21654; bugfix on 0.2.3.1-alpha.
16076 - Make display of captured unit test log messages consistent. Fixes
16077 bug 21510; bugfix on 0.2.9.3-alpha.
16078 - Make test-network.sh always call chutney's test-network.sh.
16079 Previously, this only worked on systems which had bash installed,
16080 due to some bash-specific code in the script. Fixes bug 19699;
16081 bugfix on 0.3.0.4-rc. Follow-up to ticket 21581.
16083 o Minor bugfixes (voting consistency):
16084 - Reject version numbers with non-numeric prefixes (such as +, -, or
16085 whitespace). Disallowing whitespace prevents differential version
16086 parsing between POSIX-based and Windows platforms. Fixes bug 21507
16087 and part of 21508; bugfix on 0.0.8pre1.
16089 o Minor bugfixes (windows, relay):
16090 - Resolve "Failure from drain_fd: No error" warnings on Windows
16091 relays. Fixes bug 21540; bugfix on 0.2.6.3-alpha.
16093 o Code simplification and refactoring:
16094 - Break up the 630-line function connection_dir_client_reached_eof()
16095 into a dozen smaller functions. This change should help
16096 maintainability and readability of the client directory code.
16097 - Isolate our use of the openssl headers so that they are only
16098 included from our crypto wrapper modules, and from tests that
16099 examine those modules' internals. Closes ticket 21841.
16100 - Simplify our API to launch directory requests, making it more
16101 extensible and less error-prone. Now it's easier to add extra
16102 headers to directory requests. Closes ticket 21646.
16103 - Our base64 decoding functions no longer overestimate the output
16104 space that they need when parsing unpadded inputs. Closes
16106 - Remove unused "ROUTER_ADDED_NOTIFY_GENERATOR" internal value.
16107 Resolves ticket 22213.
16108 - The logic that directory caches use to spool request to clients,
16109 serving them one part at a time so as not to allocate too much
16110 memory, has been refactored for consistency. Previously there was
16111 a separate spooling implementation per type of spoolable data. Now
16112 there is one common spooling implementation, with extensible data
16113 types. Closes ticket 21651.
16114 - Tor's compression module now supports multiple backends. Part of
16115 the implementation for proposal 278; closes ticket 21663.
16118 - Clarify the behavior of the KeepAliveIsolateSOCKSAuth sub-option.
16119 Closes ticket 21873.
16120 - Correct documentation about the default DataDirectory value.
16121 Closes ticket 21151.
16122 - Document the default behavior of NumEntryGuards and
16123 NumDirectoryGuards correctly. Fixes bug 21715; bugfix
16125 - Document key=value pluggable transport arguments for Bridge lines
16126 in torrc. Fixes bug 20341; bugfix on 0.2.5.1-alpha.
16127 - Note that bandwidth-limiting options don't affect TCP headers or
16128 DNS. Closes ticket 17170.
16130 o Removed features (configuration options, all in ticket 22060):
16131 - These configuration options are now marked Obsolete, and no longer
16132 have any effect: AllowInvalidNodes, AllowSingleHopCircuits,
16133 AllowSingleHopExits, ExcludeSingleHopRelays, FastFirstHopPK,
16134 TLSECGroup, WarnUnsafeSocks. They were first marked as deprecated
16135 in 0.2.9.2-alpha and have now been removed. The previous default
16136 behavior is now always chosen; the previous (less secure) non-
16137 default behavior is now unavailable.
16138 - CloseHSClientCircuitsImmediatelyOnTimeout and
16139 CloseHSServiceRendCircuitsImmediatelyOnTimeout were deprecated in
16140 0.2.9.2-alpha and now have been removed. HS circuits never close
16141 on circuit build timeout; they have a longer timeout period.
16142 - {Control,DNS,Dir,Socks,Trans,NATD,OR}ListenAddress were deprecated
16143 in 0.2.9.2-alpha and now have been removed. Use the ORPort option
16144 (and others) to configure listen-only and advertise-only addresses.
16146 o Removed features (tools):
16147 - We've removed the tor-checkkey tool from src/tools. Long ago, we
16148 used it to help people detect RSA keys that were generated by
16149 versions of Debian affected by CVE-2008-0166. But those keys have
16150 been out of circulation for ages, and this tool is no longer
16151 required. Closes ticket 21842.
16154 Changes in version 0.3.0.7 - 2017-05-15
16155 Tor 0.3.0.7 fixes a medium-severity security bug in earlier versions
16156 of Tor 0.3.0.x, where an attacker could cause a Tor relay process
16157 to exit. Relays running earlier versions of Tor 0.3.0.x should upgrade;
16158 clients are not affected.
16160 o Major bugfixes (hidden service directory, security):
16161 - Fix an assertion failure in the hidden service directory code, which
16162 could be used by an attacker to remotely cause a Tor relay process to
16163 exit. Relays running earlier versions of Tor 0.3.0.x should upgrade.
16164 should upgrade. This security issue is tracked as TROVE-2017-002.
16165 Fixes bug 22246; bugfix on 0.3.0.1-alpha.
16168 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
16171 o Minor features (future-proofing):
16172 - Tor no longer refuses to download microdescriptors or descriptors
16173 if they are listed as "published in the future". This change will
16174 eventually allow us to stop listing meaningful "published" dates
16175 in microdescriptor consensuses, and thereby allow us to reduce the
16176 resources required to download consensus diffs by over 50%.
16177 Implements part of ticket 21642; implements part of proposal 275.
16179 o Minor bugfixes (Linux seccomp2 sandbox):
16180 - The getpid() system call is now permitted under the Linux seccomp2
16181 sandbox, to avoid crashing with versions of OpenSSL (and other
16182 libraries) that attempt to learn the process's PID by using the
16183 syscall rather than the VDSO code. Fixes bug 21943; bugfix
16187 Changes in version 0.3.0.6 - 2017-04-26
16188 Tor 0.3.0.6 is the first stable release of the Tor 0.3.0 series.
16190 With the 0.3.0 series, clients and relays now use Ed25519 keys to
16191 authenticate their link connections to relays, rather than the old
16192 RSA1024 keys that they used before. (Circuit crypto has been
16193 Curve25519-authenticated since 0.2.4.8-alpha.) We have also replaced
16194 the guard selection and replacement algorithm to behave more robustly
16195 in the presence of unreliable networks, and to resist guard-
16198 This series also includes numerous other small features and bugfixes,
16199 along with more groundwork for the upcoming hidden-services revamp.
16201 Per our stable release policy, we plan to support the Tor 0.3.0
16202 release series for at least the next nine months, or for three months
16203 after the first stable release of the 0.3.1 series: whichever is
16204 longer. If you need a release with long-term support, we recommend
16205 that you stay with the 0.2.9 series.
16207 Below are the changes since 0.3.0.5-rc. For a list of all changes
16208 since 0.2.9, see the ReleaseNotes file.
16210 o Minor features (geoip):
16211 - Update geoip and geoip6 to the April 4 2017 Maxmind GeoLite2
16214 o Minor bugfixes (control port):
16215 - The GETINFO extra-info/digest/<digest> command was broken because
16216 of a wrong base16 decode return value check, introduced when
16217 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
16219 o Minor bugfixes (crash prevention):
16220 - Fix a (currently untriggerable, but potentially dangerous) crash
16221 bug when base32-encoding inputs whose sizes are not a multiple of
16222 5. Fixes bug 21894; bugfix on 0.2.9.1-alpha.
16225 Changes in version 0.3.0.5-rc - 2017-04-05
16226 Tor 0.3.0.5-rc fixes a few remaining bugs, large and small, in the
16227 0.3.0 release series.
16229 This is the second release candidate in the Tor 0.3.0 series, and has
16230 much fewer changes than the first. If we find no new bugs or
16231 regressions here, the first stable 0.3.0 release will be nearly
16234 o Major bugfixes (crash, directory connections):
16235 - Fix a rare crash when sending a begin cell on a circuit whose
16236 linked directory connection had already been closed. Fixes bug
16237 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
16239 o Major bugfixes (guard selection):
16240 - Fix a guard selection bug where Tor would refuse to bootstrap in
16241 some cases if the user swapped a bridge for another bridge in
16242 their configuration file. Fixes bug 21771; bugfix on 0.3.0.1-alpha.
16243 Reported by "torvlnt33r".
16245 o Minor features (geoip):
16246 - Update geoip and geoip6 to the March 7 2017 Maxmind GeoLite2
16249 o Minor bugfix (compilation):
16250 - Fix a warning when compiling hs_service.c. Previously, it had no
16251 exported symbols when compiled for libor.a, resulting in a
16252 compilation warning from clang. Fixes bug 21825; bugfix
16255 o Minor bugfixes (hidden services):
16256 - Make hidden services check for failed intro point connections,
16257 even when they have exceeded their intro point creation limit.
16258 Fixes bug 21596; bugfix on 0.2.7.2-alpha. Reported by Alec Muffett.
16259 - Make hidden services with 8 to 10 introduction points check for
16260 failed circuits immediately after startup. Previously, they would
16261 wait for 5 minutes before performing their first checks. Fixes bug
16262 21594; bugfix on 0.2.3.9-alpha. Reported by Alec Muffett.
16264 o Minor bugfixes (memory leaks):
16265 - Fix a memory leak when using GETCONF on a port option. Fixes bug
16266 21682; bugfix on 0.3.0.3-alpha.
16268 o Minor bugfixes (relay):
16269 - Avoid a double-marked-circuit warning that could happen when we
16270 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
16273 o Minor bugfixes (tests):
16274 - Run the entry_guard_parse_from_state_full() test with the time set
16275 to a specific date. (The guard state that this test was parsing
16276 contained guards that had expired since the test was first
16277 written.) Fixes bug 21799; bugfix on 0.3.0.1-alpha.
16280 - Update the description of the directory server options in the
16281 manual page, to clarify that a relay no longer needs to set
16282 DirPort in order to be a directory cache. Closes ticket 21720.
16286 Changes in version 0.2.8.13 - 2017-03-03
16287 Tor 0.2.8.13 backports a security fix from later Tor
16288 releases. Anybody running Tor 0.2.8.12 or earlier should upgrade to this
16289 this release, if for some reason they cannot upgrade to a later
16290 release series, and if they build Tor with the --enable-expensive-hardening
16293 Note that support for Tor 0.2.8.x is ending next year: we will not issue
16294 any fixes for the Tor 0.2.8.x series after 1 Jan 2018. If you need
16295 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16297 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16298 - Fix an integer underflow bug when comparing malformed Tor
16299 versions. This bug could crash Tor when built with
16300 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16301 0.2.9.8, which were built with -ftrapv by default. In other cases
16302 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16303 on 0.0.8pre1. Found by OSS-Fuzz.
16305 o Minor features (geoip):
16306 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16310 Changes in version 0.2.7.7 - 2017-03-03
16311 Tor 0.2.7.7 backports a number of security fixes from later Tor
16312 releases. Anybody running Tor 0.2.7.6 or earlier should upgrade to
16313 this release, if for some reason they cannot upgrade to a later
16316 Note that support for Tor 0.2.7.x is ending this year: we will not issue
16317 any fixes for the Tor 0.2.7.x series after 1 August 2017. If you need
16318 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16320 o Directory authority changes (backport from 0.2.8.5-rc):
16321 - Urras is no longer a directory authority. Closes ticket 19271.
16323 o Directory authority changes (backport from 0.2.9.2-alpha):
16324 - The "Tonga" bridge authority has been retired; the new bridge
16325 authority is "Bifroest". Closes tickets 19728 and 19690.
16327 o Directory authority key updates (backport from 0.2.8.1-alpha):
16328 - Update the V3 identity key for the dannenberg directory authority:
16329 it was changed on 18 November 2015. Closes task 17906. Patch
16332 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16333 - Fix a bug in parsing that could cause clients to read a single
16334 byte past the end of an allocated region. This bug could be used
16335 to cause hardened clients (built with --enable-expensive-hardening)
16336 to crash if they tried to visit a hostile hidden service. Non-
16337 hardened clients are only affected depending on the details of
16338 their platform's memory allocator. Fixes bug 21018; bugfix on
16339 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16340 2016-12-002 and as CVE-2016-1254.
16342 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
16343 - Stop a crash that could occur when a client running with DNSPort
16344 received a query with multiple address types, and the first
16345 address type was not supported. Found and fixed by Scott Dial.
16346 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
16347 - Prevent a class of security bugs caused by treating the contents
16348 of a buffer chunk as if they were a NUL-terminated string. At
16349 least one such bug seems to be present in all currently used
16350 versions of Tor, and would allow an attacker to remotely crash
16351 most Tor instances, especially those compiled with extra compiler
16352 hardening. With this defense in place, such bugs can't crash Tor,
16353 though we should still fix them as they occur. Closes ticket
16354 20384 (TROVE-2016-10-001).
16356 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16357 - Avoid a difficult-to-trigger heap corruption attack when extending
16358 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16359 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16360 Reported by Guido Vranken.
16362 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16363 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16364 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16366 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16367 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16368 pointer to the previous (uninitialized) key value. The impact here
16369 should be limited to a difficult-to-trigger crash, if OpenSSL is
16370 running an engine that makes key generation failures possible, or
16371 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16372 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16375 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16376 - Fix an integer underflow bug when comparing malformed Tor
16377 versions. This bug could crash Tor when built with
16378 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16379 0.2.9.8, which were built with -ftrapv by default. In other cases
16380 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16381 on 0.0.8pre1. Found by OSS-Fuzz.
16383 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16384 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16385 zero size. Check size argument to memwipe() for underflow. Fixes
16386 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16389 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16390 - Make Tor survive errors involving connections without a
16391 corresponding event object. Previously we'd fail with an
16392 assertion; now we produce a log message. Related to bug 16248.
16394 o Minor features (geoip):
16395 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16399 Changes in version 0.2.6.11 - 2017-03-03
16400 Tor 0.2.6.11 backports a number of security fixes from later Tor
16401 releases. Anybody running Tor 0.2.6.10 or earlier should upgrade to
16402 this release, if for some reason they cannot upgrade to a later
16405 Note that support for Tor 0.2.6.x is ending this year: we will not issue
16406 any fixes for the Tor 0.2.6.x series after 1 August 2017. If you need
16407 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16409 o Directory authority changes (backport from 0.2.8.5-rc):
16410 - Urras is no longer a directory authority. Closes ticket 19271.
16412 o Directory authority changes (backport from 0.2.9.2-alpha):
16413 - The "Tonga" bridge authority has been retired; the new bridge
16414 authority is "Bifroest". Closes tickets 19728 and 19690.
16416 o Directory authority key updates (backport from 0.2.8.1-alpha):
16417 - Update the V3 identity key for the dannenberg directory authority:
16418 it was changed on 18 November 2015. Closes task 17906. Patch
16421 o Major features (security fixes, backport from 0.2.9.4-alpha):
16422 - Prevent a class of security bugs caused by treating the contents
16423 of a buffer chunk as if they were a NUL-terminated string. At
16424 least one such bug seems to be present in all currently used
16425 versions of Tor, and would allow an attacker to remotely crash
16426 most Tor instances, especially those compiled with extra compiler
16427 hardening. With this defense in place, such bugs can't crash Tor,
16428 though we should still fix them as they occur. Closes ticket
16429 20384 (TROVE-2016-10-001).
16431 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16432 - Fix a bug in parsing that could cause clients to read a single
16433 byte past the end of an allocated region. This bug could be used
16434 to cause hardened clients (built with --enable-expensive-hardening)
16435 to crash if they tried to visit a hostile hidden service. Non-
16436 hardened clients are only affected depending on the details of
16437 their platform's memory allocator. Fixes bug 21018; bugfix on
16438 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16439 2016-12-002 and as CVE-2016-1254.
16441 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
16442 - Stop a crash that could occur when a client running with DNSPort
16443 received a query with multiple address types, and the first
16444 address type was not supported. Found and fixed by Scott Dial.
16445 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
16447 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
16448 - Fix an error that could cause us to read 4 bytes before the
16449 beginning of an openssl string. This bug could be used to cause
16450 Tor to crash on systems with unusual malloc implementations, or
16451 systems with unusual hardening installed. Fixes bug 17404; bugfix
16454 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16455 - Avoid a difficult-to-trigger heap corruption attack when extending
16456 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16457 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16458 Reported by Guido Vranken.
16460 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16461 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16462 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16464 o Major bugfixes (guard selection, backport from 0.2.7.6):
16465 - Actually look at the Guard flag when selecting a new directory
16466 guard. When we implemented the directory guard design, we
16467 accidentally started treating all relays as if they have the Guard
16468 flag during guard selection, leading to weaker anonymity and worse
16469 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
16472 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16473 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16474 pointer to the previous (uninitialized) key value. The impact here
16475 should be limited to a difficult-to-trigger crash, if OpenSSL is
16476 running an engine that makes key generation failures possible, or
16477 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16478 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16481 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16482 - Fix an integer underflow bug when comparing malformed Tor
16483 versions. This bug could crash Tor when built with
16484 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16485 0.2.9.8, which were built with -ftrapv by default. In other cases
16486 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16487 on 0.0.8pre1. Found by OSS-Fuzz.
16489 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16490 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16491 zero size. Check size argument to memwipe() for underflow. Fixes
16492 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16495 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16496 - Make Tor survive errors involving connections without a
16497 corresponding event object. Previously we'd fail with an
16498 assertion; now we produce a log message. Related to bug 16248.
16500 o Minor features (geoip):
16501 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16504 o Minor bugfixes (compilation, backport from 0.2.7.6):
16505 - Fix a compilation warning with Clang 3.6: Do not check the
16506 presence of an address which can never be NULL. Fixes bug 17781.
16509 Changes in version 0.2.5.13 - 2017-03-03
16510 Tor 0.2.5.13 backports a number of security fixes from later Tor
16511 releases. Anybody running Tor 0.2.5.13 or earlier should upgrade to
16512 this release, if for some reason they cannot upgrade to a later
16515 Note that support for Tor 0.2.5.x is ending next year: we will not issue
16516 any fixes for the Tor 0.2.5.x series after 1 May 2018. If you need
16517 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16519 o Directory authority changes (backport from 0.2.8.5-rc):
16520 - Urras is no longer a directory authority. Closes ticket 19271.
16522 o Directory authority changes (backport from 0.2.9.2-alpha):
16523 - The "Tonga" bridge authority has been retired; the new bridge
16524 authority is "Bifroest". Closes tickets 19728 and 19690.
16526 o Directory authority key updates (backport from 0.2.8.1-alpha):
16527 - Update the V3 identity key for the dannenberg directory authority:
16528 it was changed on 18 November 2015. Closes task 17906. Patch
16531 o Major features (security fixes, backport from 0.2.9.4-alpha):
16532 - Prevent a class of security bugs caused by treating the contents
16533 of a buffer chunk as if they were a NUL-terminated string. At
16534 least one such bug seems to be present in all currently used
16535 versions of Tor, and would allow an attacker to remotely crash
16536 most Tor instances, especially those compiled with extra compiler
16537 hardening. With this defense in place, such bugs can't crash Tor,
16538 though we should still fix them as they occur. Closes ticket
16539 20384 (TROVE-2016-10-001).
16541 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16542 - Fix a bug in parsing that could cause clients to read a single
16543 byte past the end of an allocated region. This bug could be used
16544 to cause hardened clients (built with --enable-expensive-hardening)
16545 to crash if they tried to visit a hostile hidden service. Non-
16546 hardened clients are only affected depending on the details of
16547 their platform's memory allocator. Fixes bug 21018; bugfix on
16548 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16549 2016-12-002 and as CVE-2016-1254.
16551 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
16552 - Stop a crash that could occur when a client running with DNSPort
16553 received a query with multiple address types, and the first
16554 address type was not supported. Found and fixed by Scott Dial.
16555 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
16557 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
16558 - Fix an error that could cause us to read 4 bytes before the
16559 beginning of an openssl string. This bug could be used to cause
16560 Tor to crash on systems with unusual malloc implementations, or
16561 systems with unusual hardening installed. Fixes bug 17404; bugfix
16564 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16565 - Avoid a difficult-to-trigger heap corruption attack when extending
16566 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16567 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16568 Reported by Guido Vranken.
16570 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16571 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16572 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16574 o Major bugfixes (guard selection, backport from 0.2.7.6):
16575 - Actually look at the Guard flag when selecting a new directory
16576 guard. When we implemented the directory guard design, we
16577 accidentally started treating all relays as if they have the Guard
16578 flag during guard selection, leading to weaker anonymity and worse
16579 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
16582 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16583 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16584 pointer to the previous (uninitialized) key value. The impact here
16585 should be limited to a difficult-to-trigger crash, if OpenSSL is
16586 running an engine that makes key generation failures possible, or
16587 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16588 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16591 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16592 - Fix an integer underflow bug when comparing malformed Tor
16593 versions. This bug could crash Tor when built with
16594 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16595 0.2.9.8, which were built with -ftrapv by default. In other cases
16596 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16597 on 0.0.8pre1. Found by OSS-Fuzz.
16599 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16600 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16601 zero size. Check size argument to memwipe() for underflow. Fixes
16602 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16605 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16606 - Make Tor survive errors involving connections without a
16607 corresponding event object. Previously we'd fail with an
16608 assertion; now we produce a log message. Related to bug 16248.
16610 o Minor features (geoip):
16611 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16614 o Minor bugfixes (compilation, backport from 0.2.7.6):
16615 - Fix a compilation warning with Clang 3.6: Do not check the
16616 presence of an address which can never be NULL. Fixes bug 17781.
16618 o Minor bugfixes (crypto error-handling, backport from 0.2.7.2-alpha):
16619 - Check for failures from crypto_early_init, and refuse to continue.
16620 A previous typo meant that we could keep going with an
16621 uninitialized crypto library, and would have OpenSSL initialize
16622 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
16623 when implementing ticket 4900. Patch by "teor".
16625 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
16626 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
16627 a client authorized hidden service. Fixes bug 15823; bugfix
16631 Changes in version 0.2.4.28 - 2017-03-03
16632 Tor 0.2.4.28 backports a number of security fixes from later Tor
16633 releases. Anybody running Tor 0.2.4.27 or earlier should upgrade to
16634 this release, if for some reason they cannot upgrade to a later
16637 Note that support for Tor 0.2.4.x is ending soon: we will not issue
16638 any fixes for the Tor 0.2.4.x series after 1 August 2017. If you need
16639 a Tor release series with long-term support, we recommend Tor 0.2.9.x.
16641 o Directory authority changes (backport from 0.2.8.5-rc):
16642 - Urras is no longer a directory authority. Closes ticket 19271.
16644 o Directory authority changes (backport from 0.2.9.2-alpha):
16645 - The "Tonga" bridge authority has been retired; the new bridge
16646 authority is "Bifroest". Closes tickets 19728 and 19690.
16648 o Directory authority key updates (backport from 0.2.8.1-alpha):
16649 - Update the V3 identity key for the dannenberg directory authority:
16650 it was changed on 18 November 2015. Closes task 17906. Patch
16653 o Major features (security fixes, backport from 0.2.9.4-alpha):
16654 - Prevent a class of security bugs caused by treating the contents
16655 of a buffer chunk as if they were a NUL-terminated string. At
16656 least one such bug seems to be present in all currently used
16657 versions of Tor, and would allow an attacker to remotely crash
16658 most Tor instances, especially those compiled with extra compiler
16659 hardening. With this defense in place, such bugs can't crash Tor,
16660 though we should still fix them as they occur. Closes ticket
16661 20384 (TROVE-2016-10-001).
16663 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16664 - Fix a bug in parsing that could cause clients to read a single
16665 byte past the end of an allocated region. This bug could be used
16666 to cause hardened clients (built with --enable-expensive-hardening)
16667 to crash if they tried to visit a hostile hidden service. Non-
16668 hardened clients are only affected depending on the details of
16669 their platform's memory allocator. Fixes bug 21018; bugfix on
16670 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16671 2016-12-002 and as CVE-2016-1254.
16673 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
16674 - Fix an error that could cause us to read 4 bytes before the
16675 beginning of an openssl string. This bug could be used to cause
16676 Tor to crash on systems with unusual malloc implementations, or
16677 systems with unusual hardening installed. Fixes bug 17404; bugfix
16680 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16681 - Avoid a difficult-to-trigger heap corruption attack when extending
16682 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16683 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16684 Reported by Guido Vranken.
16686 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16687 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16688 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16690 o Major bugfixes (guard selection, backport from 0.2.7.6):
16691 - Actually look at the Guard flag when selecting a new directory
16692 guard. When we implemented the directory guard design, we
16693 accidentally started treating all relays as if they have the Guard
16694 flag during guard selection, leading to weaker anonymity and worse
16695 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
16698 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16699 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16700 pointer to the previous (uninitialized) key value. The impact here
16701 should be limited to a difficult-to-trigger crash, if OpenSSL is
16702 running an engine that makes key generation failures possible, or
16703 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16704 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16707 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16708 - Fix an integer underflow bug when comparing malformed Tor
16709 versions. This bug could crash Tor when built with
16710 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16711 0.2.9.8, which were built with -ftrapv by default. In other cases
16712 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16713 on 0.0.8pre1. Found by OSS-Fuzz.
16715 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16716 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16717 zero size. Check size argument to memwipe() for underflow. Fixes
16718 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16721 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16722 - Make Tor survive errors involving connections without a
16723 corresponding event object. Previously we'd fail with an
16724 assertion; now we produce a log message. Related to bug 16248.
16726 o Minor features (DoS-resistance, backport from 0.2.7.1-alpha):
16727 - Make it harder for attackers to overload hidden services with
16728 introductions, by blocking multiple introduction requests on the
16729 same circuit. Resolves ticket 15515.
16731 o Minor features (geoip):
16732 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16735 o Minor bugfixes (compilation, backport from 0.2.7.6):
16736 - Fix a compilation warning with Clang 3.6: Do not check the
16737 presence of an address which can never be NULL. Fixes bug 17781.
16739 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
16740 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
16741 a client authorized hidden service. Fixes bug 15823; bugfix
16745 Changes in version 0.3.0.4-rc - 2017-03-01
16746 Tor 0.3.0.4-rc fixes some remaining bugs, large and small, in the
16747 0.3.0 release series, and introduces a few reliability features to
16748 keep them from coming back.
16750 This is the first release candidate in the Tor 0.3.0 series. If we
16751 find no new bugs or regressions here, the first stable 0.3.0 release
16752 will be nearly identical to it.
16754 o Major bugfixes (bridges):
16755 - When the same bridge is configured multiple times with the same
16756 identity, but at different address:port combinations, treat those
16757 bridge instances as separate guards. This fix restores the ability
16758 of clients to configure the same bridge with multiple pluggable
16759 transports. Fixes bug 21027; bugfix on 0.3.0.1-alpha.
16761 o Major bugfixes (hidden service directory v3):
16762 - Stop crashing on a failed v3 hidden service descriptor lookup
16763 failure. Fixes bug 21471; bugfixes on 0.3.0.1-alpha.
16765 o Major bugfixes (parsing):
16766 - When parsing a malformed content-length field from an HTTP
16767 message, do not read off the end of the buffer. This bug was a
16768 potential remote denial-of-service attack against Tor clients and
16769 relays. A workaround was released in October 2016, to prevent this
16770 bug from crashing Tor. This is a fix for the underlying issue,
16771 which should no longer matter (if you applied the earlier patch).
16772 Fixes bug 20894; bugfix on 0.2.0.16-alpha. Bug found by fuzzing
16773 using AFL (http://lcamtuf.coredump.cx/afl/).
16774 - Fix an integer underflow bug when comparing malformed Tor
16775 versions. This bug could crash Tor when built with
16776 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16777 0.2.9.8, which were built with -ftrapv by default. In other cases
16778 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16779 on 0.0.8pre1. Found by OSS-Fuzz.
16781 o Minor feature (protocol versioning):
16782 - Add new protocol version for proposal 224. HSIntro now advertises
16783 version "3-4" and HSDir version "1-2". Fixes ticket 20656.
16785 o Minor features (directory authorities):
16786 - Directory authorities now reject descriptors that claim to be
16787 malformed versions of Tor. Helps prevent exploitation of
16789 - Reject version numbers with components that exceed INT32_MAX.
16790 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
16791 Fixes bug 21450; bugfix on 0.0.8pre1.
16792 - Directory authorities now reject relays running versions
16793 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
16794 suffer from bug 20499 and don't keep their consensus cache
16795 up-to-date. Resolves ticket 20509.
16797 o Minor features (geoip):
16798 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16801 o Minor features (reliability, crash):
16802 - Try better to detect problems in buffers where they might grow (or
16803 think they have grown) over 2 GB in size. Diagnostic for
16806 o Minor features (testing):
16807 - During 'make test-network-all', if tor logs any warnings, ask
16808 chutney to output them. Requires a recent version of chutney with
16809 the 21572 patch. Implements 21570.
16811 o Minor bugfixes (certificate expiration time):
16812 - Avoid using link certificates that don't become valid till some
16813 time in the future. Fixes bug 21420; bugfix on 0.2.4.11-alpha
16815 o Minor bugfixes (code correctness):
16816 - Repair a couple of (unreachable or harmless) cases of the risky
16817 comparison-by-subtraction pattern that caused bug 21278.
16818 - Remove a redundant check for the UseEntryGuards option from the
16819 options_transition_affects_guards() function. Fixes bug 21492;
16820 bugfix on 0.3.0.1-alpha.
16822 o Minor bugfixes (directory mirrors):
16823 - Allow relays to use directory mirrors without a DirPort: these
16824 relays need to be contacted over their ORPorts using a begindir
16825 connection. Fixes one case of bug 20711; bugfix on 0.2.8.2-alpha.
16826 - Clarify the message logged when a remote relay is unexpectedly
16827 missing an ORPort or DirPort: users were confusing this with a
16828 local port. Fixes another case of bug 20711; bugfix
16831 o Minor bugfixes (guards):
16832 - Don't warn about a missing guard state on timeout-measurement
16833 circuits: they aren't supposed to be using guards. Fixes an
16834 instance of bug 21007; bugfix on 0.3.0.1-alpha.
16835 - Silence a BUG() warning when attempting to use a guard whose
16836 descriptor we don't know, and make this scenario less likely to
16837 happen. Fixes bug 21415; bugfix on 0.3.0.1-alpha.
16839 o Minor bugfixes (hidden service):
16840 - Pass correct buffer length when encoding legacy ESTABLISH_INTRO
16841 cells. Previously, we were using sizeof() on a pointer, instead of
16842 the real destination buffer. Fortunately, that value was only used
16843 to double-check that there was enough room--which was already
16844 enforced elsewhere. Fixes bug 21553; bugfix on 0.3.0.1-alpha.
16846 o Minor bugfixes (testing):
16847 - Fix Raspbian build issues related to missing socket errno in
16848 test_util.c. Fixes bug 21116; bugfix on 0.2.8.2. Patch
16850 - Rename "make fuzz" to "make test-fuzz-corpora", since it doesn't
16851 actually fuzz anything. Fixes bug 21447; bugfix on 0.3.0.3-alpha.
16852 - Use bash in src/test/test-network.sh. This ensures we reliably
16853 call chutney's newer tools/test-network.sh when available. Fixes
16854 bug 21562; bugfix on 0.2.9.1-alpha.
16857 - Small fixes to the fuzzing documentation. Closes ticket 21472.
16860 Changes in version 0.2.9.10 - 2017-03-01
16861 Tor 0.2.9.10 backports a security fix from later Tor release. It also
16862 includes fixes for some major issues affecting directory authorities,
16863 LibreSSL compatibility, and IPv6 correctness.
16865 The Tor 0.2.9.x release series is now marked as a long-term-support
16866 series. We intend to backport security fixes to 0.2.9.x until at
16867 least January of 2020.
16869 o Major bugfixes (directory authority, 0.3.0.3-alpha):
16870 - During voting, when marking a relay as a probable sybil, do not
16871 clear its BadExit flag: sybils can still be bad in other ways
16872 too. (We still clear the other flags.) Fixes bug 21108; bugfix
16875 o Major bugfixes (IPv6 Exits, backport from 0.3.0.3-alpha):
16876 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
16877 any IPv6 addresses. Instead, only reject a port over IPv6 if the
16878 exit policy rejects that port on more than an IPv6 /16 of
16879 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
16880 which rejected a relay's own IPv6 address by default. Fixes bug
16881 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
16883 o Major bugfixes (parsing, also in 0.3.0.4-rc):
16884 - Fix an integer underflow bug when comparing malformed Tor
16885 versions. This bug could crash Tor when built with
16886 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16887 0.2.9.8, which were built with -ftrapv by default. In other cases
16888 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16889 on 0.0.8pre1. Found by OSS-Fuzz.
16891 o Minor features (directory authorities, also in 0.3.0.4-rc):
16892 - Directory authorities now reject descriptors that claim to be
16893 malformed versions of Tor. Helps prevent exploitation of
16895 - Reject version numbers with components that exceed INT32_MAX.
16896 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
16897 Fixes bug 21450; bugfix on 0.0.8pre1.
16899 o Minor features (geoip):
16900 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16903 o Minor features (portability, compilation, backport from 0.3.0.3-alpha):
16904 - Autoconf now checks to determine if OpenSSL structures are opaque,
16905 instead of explicitly checking for OpenSSL version numbers. Part
16907 - Support building with recent LibreSSL code that uses opaque
16908 structures. Closes ticket 21359.
16910 o Minor bugfixes (code correctness, also in 0.3.0.4-rc):
16911 - Repair a couple of (unreachable or harmless) cases of the risky
16912 comparison-by-subtraction pattern that caused bug 21278.
16914 o Minor bugfixes (tor-resolve, backport from 0.3.0.3-alpha):
16915 - The tor-resolve command line tool now rejects hostnames over 255
16916 characters in length. Previously, it would silently truncate them,
16917 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
16918 Patch by "junglefowl".
16921 Changes in version 0.3.0.3-alpha - 2017-02-03
16922 Tor 0.3.0.3-alpha fixes a few significant bugs introduced over the
16923 0.3.0.x development series, including some that could cause
16924 authorities to behave badly. There is also a fix for a longstanding
16925 bug that could prevent IPv6 exits from working. Tor 0.3.0.3-alpha also
16926 includes some smaller features and bugfixes.
16928 The Tor 0.3.0.x release series is now in patch-freeze: no additional
16929 features will be considered for inclusion in 0.3.0.x. We suspect that
16930 some bugs will probably remain, however, and we encourage people to
16933 o Major bugfixes (directory authority):
16934 - During voting, when marking a relay as a probable sybil, do not
16935 clear its BadExit flag: sybils can still be bad in other ways
16936 too. (We still clear the other flags.) Fixes bug 21108; bugfix
16938 - When deciding whether we have just found a router to be reachable,
16939 do not penalize it for not having performed an Ed25519 link
16940 handshake if it does not claim to support an Ed25519 handshake.
16941 Previously, we would treat such relays as non-running. Fixes bug
16942 21107; bugfix on 0.3.0.1-alpha.
16944 o Major bugfixes (entry guards):
16945 - Stop trying to build circuits through entry guards for which we
16946 have no descriptor. Also, stop crashing in the case that we *do*
16947 accidentally try to build a circuit in such a state. Fixes bug
16948 21242; bugfix on 0.3.0.1-alpha.
16950 o Major bugfixes (IPv6 Exits):
16951 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
16952 any IPv6 addresses. Instead, only reject a port over IPv6 if the
16953 exit policy rejects that port on more than an IPv6 /16 of
16954 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
16955 which rejected a relay's own IPv6 address by default. Fixes bug
16956 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
16958 o Minor feature (client):
16959 - Enable IPv6 traffic on the SocksPort by default. To disable this,
16960 a user will have to specify "NoIPv6Traffic". Closes ticket 21269.
16962 o Minor feature (fallback scripts):
16963 - Add a check_existing mode to updateFallbackDirs.py, which checks
16964 if fallbacks in the hard-coded list are working. Closes ticket
16965 20174. Patch by haxxpop.
16967 o Minor features (ciphersuite selection):
16968 - Clients now advertise a list of ciphersuites closer to the ones
16969 preferred by Firefox. Closes part of ticket 15426.
16970 - Allow relays to accept a wider range of ciphersuites, including
16971 chacha20-poly1305 and AES-CCM. Closes the other part of 15426.
16973 o Minor features (controller, configuration):
16974 - Each of the *Port options, such as SocksPort, ORPort, ControlPort,
16975 and so on, now comes with a __*Port variant that will not be saved
16976 to the torrc file by the controller's SAVECONF command. This
16977 change allows TorBrowser to set up a single-use domain socket for
16978 each time it launches Tor. Closes ticket 20956.
16979 - The GETCONF command can now query options that may only be
16980 meaningful in context-sensitive lists. This allows the controller
16981 to query the mixed SocksPort/__SocksPort style options introduced
16982 in feature 20956. Implements ticket 21300.
16984 o Minor features (portability, compilation):
16985 - Autoconf now checks to determine if OpenSSL structures are opaque,
16986 instead of explicitly checking for OpenSSL version numbers. Part
16988 - Support building with recent LibreSSL code that uses opaque
16989 structures. Closes ticket 21359.
16991 o Minor features (relay):
16992 - We now allow separation of exit and relay traffic to different
16993 source IP addresses, using the OutboundBindAddressExit and
16994 OutboundBindAddressOR options respectively. Closes ticket 17975.
16995 Written by Michael Sonntag.
16997 o Minor bugfix (logging):
16998 - Don't recommend the use of Tor2web in non-anonymous mode.
16999 Recommending Tor2web is a bad idea because the client loses all
17000 anonymity. Tor2web should only be used in specific cases by users
17001 who *know* and understand the issues. Fixes bug 21294; bugfix
17004 o Minor bugfixes (client):
17005 - Always recover from failures in extend_info_from_node(), in an
17006 attempt to prevent any recurrence of bug 21242. Fixes bug 21372;
17007 bugfix on 0.2.3.1-alpha.
17009 o Minor bugfixes (client, entry guards):
17010 - Fix a bug warning (with backtrace) when we fail a channel that
17011 circuits to fallback directories on it. Fixes bug 21128; bugfix
17013 - Fix a spurious bug warning (with backtrace) when removing an
17014 expired entry guard. Fixes bug 21129; bugfix on 0.3.0.1-alpha.
17015 - Fix a bug of the new guard algorithm where tor could stall for up
17016 to 10 minutes before retrying a guard after a long period of no
17017 network. Fixes bug 21052; bugfix on 0.3.0.1-alpha.
17018 - Do not try to build circuits until we have descriptors for our
17019 primary entry guards. Related to fix for bug 21242.
17021 o Minor bugfixes (configure, autoconf):
17022 - Rename the configure option --enable-expensive-hardening to
17023 --enable-fragile-hardening. Expensive hardening makes the tor
17024 daemon abort when some kinds of issues are detected. Thus, it
17025 makes tor more at risk of remote crashes but safer against RCE or
17026 heartbleed bug category. We now try to explain this issue in a
17027 message from the configure script. Fixes bug 21290; bugfix
17030 o Minor bugfixes (controller):
17031 - Restore the (deprecated) DROPGUARDS controller command. Fixes bug
17032 20824; bugfix on 0.3.0.1-alpha.
17034 o Minor bugfixes (hidden service):
17035 - Clean up the code for expiring intro points with no associated
17036 circuits. It was causing, rarely, a service with some expiring
17037 introduction points to not open enough additional introduction
17038 points. Fixes part of bug 21302; bugfix on 0.2.7.2-alpha.
17039 - Stop setting the torrc option HiddenServiceStatistics to "0" just
17040 because we're not a bridge or relay. Instead, we preserve whatever
17041 value the user set (or didn't set). Fixes bug 21150; bugfix
17043 - Resolve two possible underflows which could lead to creating and
17044 closing a lot of introduction point circuits in a non-stop loop.
17045 Fixes bug 21302; bugfix on 0.2.7.2-alpha.
17047 o Minor bugfixes (portability):
17048 - Use "OpenBSD" compiler macro instead of "OPENBSD" or "__OpenBSD__".
17049 It is supported by OpenBSD itself, and also by most OpenBSD
17050 variants (such as Bitrig). Fixes bug 20980; bugfix
17052 - When mapping a file of length greater than SIZE_MAX, do not
17053 silently truncate its contents. This issue could occur on 32 bit
17054 systems with large file support and files which are larger than 4
17055 GB. Fixes bug 21134; bugfix on 0.3.0.1-alpha.
17057 o Minor bugfixes (tor-resolve):
17058 - The tor-resolve command line tool now rejects hostnames over 255
17059 characters in length. Previously, it would silently truncate them,
17060 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
17061 Patch by "junglefowl".
17063 o Minor bugfixes (Windows services):
17064 - Be sure to initialize the monotonic time subsystem before using
17065 it, even when running as an NT service. Fixes bug 21356; bugfix
17069 Changes in version 0.3.0.2-alpha - 2017-01-23
17070 Tor 0.3.0.2-alpha fixes a denial-of-service bug where an attacker could
17071 cause relays and clients to crash, even if they were not built with
17072 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
17073 versions, and also affects 0.3.0.1-alpha: all relays running an affected
17074 version should upgrade.
17076 Tor 0.3.0.2-alpha also improves how exit relays and clients handle DNS
17077 time-to-live values, makes directory authorities enforce the 1-to-1
17078 mapping of relay RSA identity keys to ED25519 identity keys, fixes a
17079 client-side onion service reachability bug, does better at selecting
17080 the set of fallback directories, and more.
17082 o Major bugfixes (security, also in 0.2.9.9):
17083 - Downgrade the "-ftrapv" option from "always on" to "only on when
17084 --enable-expensive-hardening is provided." This hardening option, like
17085 others, can turn survivable bugs into crashes--and having it on by
17086 default made a (relatively harmless) integer overflow bug into a
17087 denial-of-service bug. Fixes bug 21278 (TROVE-2017-001); bugfix on
17090 o Major features (security):
17091 - Change the algorithm used to decide DNS TTLs on client and server
17092 side, to better resist DNS-based correlation attacks like the
17093 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
17094 Feamster. Now relays only return one of two possible DNS TTL
17095 values, and clients are willing to believe DNS TTL values up to 3
17096 hours long. Closes ticket 19769.
17098 o Major features (directory authority, security):
17099 - The default for AuthDirPinKeys is now 1: directory authorities
17100 will reject relays where the RSA identity key matches a previously
17101 seen value, but the Ed25519 key has changed. Closes ticket 18319.
17103 o Major bugfixes (client, guard, crash):
17104 - In circuit_get_global_origin_list(), return the actual list of
17105 origin circuits. The previous version of this code returned the
17106 list of all the circuits, and could have caused strange bugs,
17107 including possible crashes. Fixes bug 21118; bugfix
17110 o Major bugfixes (client, onion service, also in 0.2.9.9):
17111 - Fix a client-side onion service reachability bug, where multiple
17112 socks requests to an onion service (or a single slow request)
17113 could cause us to mistakenly mark some of the service's
17114 introduction points as failed, and we cache that failure so
17115 eventually we run out and can't reach the service. Also resolves a
17116 mysterious "Remote server sent bogus reason code 65021" log
17117 warning. The bug was introduced in ticket 17218, where we tried to
17118 remember the circuit end reason as a uint16_t, which mangled
17119 negative values. Partially fixes bug 21056 and fixes bug 20307;
17120 bugfix on 0.2.8.1-alpha.
17122 o Major bugfixes (DNS):
17123 - Fix a bug that prevented exit nodes from caching DNS records for
17124 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
17126 o Minor features (controller):
17127 - Add "GETINFO sr/current" and "GETINFO sr/previous" keys, to expose
17128 shared-random values to the controller. Closes ticket 19925.
17130 o Minor features (entry guards):
17131 - Add UseEntryGuards to TEST_OPTIONS_DEFAULT_VALUES in order to not
17132 break regression tests.
17133 - Require UseEntryGuards when UseBridges is set, in order to make
17134 sure bridges aren't bypassed. Resolves ticket 20502.
17136 o Minor features (fallback directories):
17137 - Select 200 fallback directories for each release. Closes
17139 - Allow 3 fallback relays per operator, which is safe now that we
17140 are choosing 200 fallback relays. Closes ticket 20912.
17141 - Exclude relays affected by bug 20499 from the fallback list.
17142 Exclude relays from the fallback list if they are running versions
17143 known to be affected by bug 20499, or if in our tests they deliver
17144 a stale consensus (i.e. one that expired more than 24 hours ago).
17145 Closes ticket 20539.
17146 - Reduce the minimum fallback bandwidth to 1 MByte/s. Part of
17148 - Require fallback directories to have the same address and port for
17149 7 days (now that we have enough relays with this stability).
17150 Relays whose OnionOO stability timer is reset on restart by bug
17151 18050 should upgrade to Tor 0.2.8.7 or later, which has a fix for
17152 this issue. Closes ticket 20880; maintains short-term fix
17154 - Require fallbacks to have flags for 90% of the time (weighted
17155 decaying average), rather than 95%. This allows at least 73% of
17156 clients to bootstrap in the first 5 seconds without contacting an
17157 authority. Part of ticket 18828.
17158 - Annotate updateFallbackDirs.py with the bandwidth and consensus
17159 weight for each candidate fallback. Closes ticket 20878.
17160 - Make it easier to change the output sort order of fallbacks.
17161 Closes ticket 20822.
17162 - Display the relay fingerprint when downloading consensuses from
17163 fallbacks. Closes ticket 20908.
17165 o Minor features (geoip, also in 0.2.9.9):
17166 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
17169 o Minor features (next-gen onion service directories):
17170 - Remove the "EnableOnionServicesV3" consensus parameter that we
17171 introduced in 0.3.0.1-alpha: relays are now always willing to act
17172 as v3 onion service directories. Resolves ticket 19899.
17174 o Minor features (linting):
17175 - Enhance the changes file linter to warn on Tor versions that are
17176 prefixed with "tor-". Closes ticket 21096.
17178 o Minor features (logging):
17179 - In several places, describe unset ed25519 keys as "<unset>",
17180 rather than the scary "AAAAAAAA...AAA". Closes ticket 21037.
17182 o Minor bugfix (control protocol):
17183 - The reply to a "GETINFO config/names" request via the control
17184 protocol now spells the type "Dependent" correctly. This is a
17185 breaking change in the control protocol. (The field seems to be
17186 ignored by the most common known controllers.) Fixes bug 18146;
17187 bugfix on 0.1.1.4-alpha.
17189 o Minor bugfixes (bug resilience):
17190 - Fix an unreachable size_t overflow in base64_decode(). Fixes bug
17191 19222; bugfix on 0.2.0.9-alpha. Found by Guido Vranken; fixed by
17192 Hans Jerry Illikainen.
17194 o Minor bugfixes (build):
17195 - Replace obsolete Autoconf macros with their modern equivalent and
17196 prevent similar issues in the future. Fixes bug 20990; bugfix
17199 o Minor bugfixes (client, guards):
17200 - Fix bug where Tor would think that there are circuits waiting for
17201 better guards even though those circuits have been freed. Fixes
17202 bug 21142; bugfix on 0.3.0.1-alpha.
17204 o Minor bugfixes (config):
17205 - Don't assert on startup when trying to get the options list and
17206 LearnCircuitBuildTimeout is set to 0: we are currently parsing the
17207 options so of course they aren't ready yet. Fixes bug 21062;
17208 bugfix on 0.2.9.3-alpha.
17210 o Minor bugfixes (controller):
17211 - Make the GETINFO interface for inquiring about entry guards
17212 support the new guards backend. Fixes bug 20823; bugfix
17215 o Minor bugfixes (dead code):
17216 - Remove a redundant check for PidFile changes at runtime in
17217 options_transition_allowed(): this check is already performed
17218 regardless of whether the sandbox is active. Fixes bug 21123;
17219 bugfix on 0.2.5.4-alpha.
17221 o Minor bugfixes (documentation):
17222 - Update the tor manual page to document every option that can not
17223 be changed while tor is running. Fixes bug 21122.
17225 o Minor bugfixes (fallback directories):
17226 - Stop failing when a relay has no uptime data in
17227 updateFallbackDirs.py. Fixes bug 20945; bugfix on 0.2.8.1-alpha.
17228 - Avoid checking fallback candidates' DirPorts if they are down in
17229 OnionOO. When a relay operator has multiple relays, this
17230 prioritizes relays that are up over relays that are down. Fixes
17231 bug 20926; bugfix on 0.2.8.3-alpha.
17232 - Stop failing when OUTPUT_COMMENTS is True in updateFallbackDirs.py.
17233 Fixes bug 20877; bugfix on 0.2.8.3-alpha.
17235 o Minor bugfixes (guards, bootstrapping):
17236 - When connecting to a directory guard during bootstrap, do not mark
17237 the guard as successful until we receive a good-looking directory
17238 response from it. Fixes bug 20974; bugfix on 0.3.0.1-alpha.
17240 o Minor bugfixes (onion services):
17241 - Fix the config reload pruning of old vs new services so it
17242 actually works when both ephemeral and non-ephemeral services are
17243 configured. Fixes bug 21054; bugfix on 0.3.0.1-alpha.
17244 - Allow the number of introduction points to be as low as 0, rather
17245 than as low as 3. Fixes bug 21033; bugfix on 0.2.7.2-alpha.
17247 o Minor bugfixes (IPv6):
17248 - Make IPv6-using clients try harder to find an IPv6 directory
17249 server. Fixes bug 20999; bugfix on 0.2.8.2-alpha.
17250 - When IPv6 addresses have not been downloaded yet (microdesc
17251 consensus documents don't list relay IPv6 addresses), use hard-
17252 coded addresses for authorities, fallbacks, and configured
17253 bridges. Now IPv6-only clients can use microdescriptors. Fixes bug
17254 20996; bugfix on b167e82 from 19608 in 0.2.8.5-alpha.
17256 o Minor bugfixes (memory leaks):
17257 - Fix a memory leak when configuring hidden services. Fixes bug
17258 20987; bugfix on 0.3.0.1-alpha.
17260 o Minor bugfixes (portability, also in 0.2.9.9):
17261 - Avoid crashing when Tor is built using headers that contain
17262 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
17263 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
17265 - Fix Libevent detection on platforms without Libevent 1 headers
17266 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
17268 o Minor bugfixes (relay):
17269 - Honor DataDirectoryGroupReadable when tor is a relay. Previously,
17270 initializing the keys would reset the DataDirectory to 0700
17271 instead of 0750 even if DataDirectoryGroupReadable was set to 1.
17272 Fixes bug 19953; bugfix on 0.0.2pre16. Patch by "redfish".
17274 o Minor bugfixes (testing):
17275 - Remove undefined behavior from the backtrace generator by removing
17276 its signal handler. Fixes bug 21026; bugfix on 0.2.5.2-alpha.
17278 o Minor bugfixes (unit tests):
17279 - Allow the unit tests to pass even when DNS lookups of bogus
17280 addresses do not fail as expected. Fixes bug 20862 and 20863;
17281 bugfix on unit tests introduced in 0.2.8.1-alpha
17282 through 0.2.9.4-alpha.
17284 o Code simplification and refactoring:
17285 - Refactor code to manipulate global_origin_circuit_list into
17286 separate functions. Closes ticket 20921.
17288 o Documentation (formatting):
17289 - Clean up formatting of tor.1 man page and HTML doc, where <pre>
17290 blocks were incorrectly appearing. Closes ticket 20885.
17292 o Documentation (man page):
17293 - Clarify many options in tor.1 and add some min/max values for
17294 HiddenService options. Closes ticket 21058.
17297 Changes in version 0.2.9.9 - 2017-01-23
17298 Tor 0.2.9.9 fixes a denial-of-service bug where an attacker could
17299 cause relays and clients to crash, even if they were not built with
17300 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
17301 versions, and also affects 0.3.0.1-alpha: all relays running an affected
17302 version should upgrade.
17304 This release also resolves a client-side onion service reachability
17305 bug, and resolves a pair of small portability issues.
17307 o Major bugfixes (security):
17308 - Downgrade the "-ftrapv" option from "always on" to "only on when
17309 --enable-expensive-hardening is provided." This hardening option,
17310 like others, can turn survivable bugs into crashes -- and having
17311 it on by default made a (relatively harmless) integer overflow bug
17312 into a denial-of-service bug. Fixes bug 21278 (TROVE-2017-001);
17313 bugfix on 0.2.9.1-alpha.
17315 o Major bugfixes (client, onion service):
17316 - Fix a client-side onion service reachability bug, where multiple
17317 socks requests to an onion service (or a single slow request)
17318 could cause us to mistakenly mark some of the service's
17319 introduction points as failed, and we cache that failure so
17320 eventually we run out and can't reach the service. Also resolves a
17321 mysterious "Remote server sent bogus reason code 65021" log
17322 warning. The bug was introduced in ticket 17218, where we tried to
17323 remember the circuit end reason as a uint16_t, which mangled
17324 negative values. Partially fixes bug 21056 and fixes bug 20307;
17325 bugfix on 0.2.8.1-alpha.
17327 o Minor features (geoip):
17328 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
17331 o Minor bugfixes (portability):
17332 - Avoid crashing when Tor is built using headers that contain
17333 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
17334 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
17336 - Fix Libevent detection on platforms without Libevent 1 headers
17337 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
17340 Changes in version 0.3.0.1-alpha - 2016-12-19
17341 Tor 0.3.0.1-alpha is the first alpha release in the 0.3.0 development
17342 series. It strengthens Tor's link and circuit handshakes by
17343 identifying relays by their Ed25519 keys, improves the algorithm that
17344 clients use to choose and maintain their list of guards, and includes
17345 additional backend support for the next-generation hidden service
17346 design. It also contains numerous other small features and
17347 improvements to security, correctness, and performance.
17349 Below are the changes since 0.2.9.8.
17351 o Major features (guard selection algorithm):
17352 - Tor's guard selection algorithm has been redesigned from the
17353 ground up, to better support unreliable networks and restrictive
17354 sets of entry nodes, and to better resist guard-capture attacks by
17355 hostile local networks. Implements proposal 271; closes
17358 o Major features (next-generation hidden services):
17359 - Relays can now handle v3 ESTABLISH_INTRO cells as specified by
17360 prop224 aka "Next Generation Hidden Services". Service and clients
17361 don't use this functionality yet. Closes ticket 19043. Based on
17362 initial code by Alec Heifetz.
17363 - Relays now support the HSDir version 3 protocol, so that they can
17364 can store and serve v3 descriptors. This is part of the next-
17365 generation onion service work detailed in proposal 224. Closes
17368 o Major features (protocol, ed25519 identity keys):
17369 - Relays now use Ed25519 to prove their Ed25519 identities and to
17370 one another, and to clients. This algorithm is faster and more
17371 secure than the RSA-based handshake we've been doing until now.
17372 Implements the second big part of proposal 220; Closes
17374 - Clients now support including Ed25519 identity keys in the EXTEND2
17375 cells they generate. By default, this is controlled by a consensus
17376 parameter, currently disabled. You can turn this feature on for
17377 testing by setting ExtendByEd25519ID in your configuration. This
17378 might make your traffic appear different than the traffic
17379 generated by other users, however. Implements part of ticket
17380 15056; part of proposal 220.
17381 - Relays now understand requests to extend to other relays by their
17382 Ed25519 identity keys. When an Ed25519 identity key is included in
17383 an EXTEND2 cell, the relay will only extend the circuit if the
17384 other relay can prove ownership of that identity. Implements part
17385 of ticket 15056; part of proposal 220.
17387 o Major bugfixes (scheduler):
17388 - Actually compare circuit policies in ewma_cmp_cmux(). This bug
17389 caused the channel scheduler to behave more or less randomly,
17390 rather than preferring channels with higher-priority circuits.
17391 Fixes bug 20459; bugfix on 0.2.6.2-alpha.
17393 o Minor features (controller):
17394 - When HSFETCH arguments cannot be parsed, say "Invalid argument"
17395 rather than "unrecognized." Closes ticket 20389; patch from
17398 o Minor features (diagnostic, directory client):
17399 - Warn when we find an unexpected inconsistency in directory
17400 download status objects. Prevents some negative consequences of
17403 o Minor features (directory authority):
17404 - Add a new authority-only AuthDirTestEd25519LinkKeys option (on by
17405 default) to control whether authorities should try to probe relays
17406 by their Ed25519 link keys. This option will go away in a few
17407 releases--unless we encounter major trouble in our ed25519 link
17408 protocol rollout, in which case it will serve as a safety option.
17410 o Minor features (directory cache):
17411 - Relays and bridges will now refuse to serve the consensus they
17412 have if they know it is too old for a client to use. Closes
17415 o Minor features (ed25519 link handshake):
17416 - Advertise support for the ed25519 link handshake using the
17417 subprotocol-versions mechanism, so that clients can tell which
17418 relays can identity themselves by Ed25519 ID. Closes ticket 20552.
17420 o Minor features (fingerprinting resistance, authentication):
17421 - Extend the length of RSA keys used for TLS link authentication to
17422 2048 bits. (These weren't used for forward secrecy; for forward
17423 secrecy, we used P256.) Closes ticket 13752.
17425 o Minor features (infrastructure):
17426 - Implement smartlist_add_strdup() function. Replaces the use of
17427 smartlist_add(sl, tor_strdup(str)). Closes ticket 20048.
17429 o Minor bugfixes (client):
17430 - When clients that use bridges start up with a cached consensus on
17431 disk, they were ignoring it and downloading a new one. Now they
17432 use the cached one. Fixes bug 20269; bugfix on 0.2.3.12-alpha.
17434 o Minor bugfixes (configuration):
17435 - Accept non-space whitespace characters after the severity level in
17436 the `Log` option. Fixes bug 19965; bugfix on 0.2.1.1-alpha.
17437 - Support "TByte" and "TBytes" units in options given in bytes.
17438 "TB", "terabyte(s)", "TBit(s)" and "terabit(s)" were already
17439 supported. Fixes bug 20622; bugfix on 0.2.0.14-alpha.
17441 o Minor bugfixes (consensus weight):
17442 - Add new consensus method that initializes bw weights to 1 instead
17443 of 0. This prevents a zero weight from making it all the way to
17444 the end (happens in small testing networks) and causing an error.
17445 Fixes bug 14881; bugfix on 0.2.2.17-alpha.
17447 o Minor bugfixes (descriptors):
17448 - Correctly recognise downloaded full descriptors as valid, even
17449 when using microdescriptors as circuits. This affects clients with
17450 FetchUselessDescriptors set, and may affect directory authorities.
17451 Fixes bug 20839; bugfix on 0.2.3.2-alpha.
17453 o Minor bugfixes (directory system):
17454 - Download all consensus flavors, descriptors, and authority
17455 certificates when FetchUselessDescriptors is set, regardless of
17456 whether tor is a directory cache or not. Fixes bug 20667; bugfix
17457 on all recent tor versions.
17458 - Bridges and relays now use microdescriptors (like clients do)
17459 rather than old-style router descriptors. Now bridges will blend
17460 in with clients in terms of the circuits they build. Fixes bug
17461 6769; bugfix on 0.2.3.2-alpha.
17463 o Minor bugfixes (ed25519 certificates):
17464 - Correctly interpret ed25519 certificates that would expire some
17465 time after 19 Jan 2038. Fixes bug 20027; bugfix on 0.2.7.2-alpha.
17467 o Minor bugfixes (hidden services):
17468 - Stop ignoring misconfigured hidden services. Instead, refuse to
17469 start tor until the misconfigurations have been corrected. Fixes
17470 bug 20559; bugfix on multiple commits in 0.2.7.1-alpha
17473 o Minor bugfixes (memory leak at exit):
17474 - Fix a small harmless memory leak at exit of the previously unused
17475 RSA->Ed identity cross-certificate. Fixes bug 17779; bugfix
17478 o Minor bugfixes (util):
17479 - When finishing writing a file to disk, if we were about to replace
17480 the file with the temporary file created before and we fail to
17481 replace it, remove the temporary file so it doesn't stay on disk.
17482 Fixes bug 20646; bugfix on 0.2.0.7-alpha. Patch by fk.
17484 o Minor bugfixes (Windows):
17485 - Check for getpagesize before using it to mmap files. This fixes
17486 compilation in some MinGW environments. Fixes bug 20530; bugfix on
17487 0.1.2.1-alpha. Reported by "ice".
17489 o Code simplification and refactoring:
17490 - Abolish all global guard context in entrynodes.c; replace with new
17491 guard_selection_t structure as preparation for proposal 271.
17492 Closes ticket 19858.
17493 - Introduce rend_service_is_ephemeral() that tells if given onion
17494 service is ephemeral. Replace unclear NULL-checkings for service
17495 directory with this function. Closes ticket 20526.
17496 - Extract magic numbers in circuituse.c into defined variables.
17497 - Refactor circuit_is_available_for_use to remove unnecessary check.
17498 - Refactor circuit_predict_and_launch_new for readability and
17499 testability. Closes ticket 18873.
17500 - Refactor large if statement in purpose_needs_anonymity to use
17501 switch statement instead. Closes part of ticket 20077.
17502 - Refactor the hashing API to return negative values for errors, as
17503 is done as throughout the codebase. Closes ticket 20717.
17504 - Remove data structures that were used to index or_connection
17505 objects by their RSA identity digests. These structures are fully
17506 redundant with the similar structures used in the
17507 channel abstraction.
17508 - Remove duplicate code in the channel_write_*cell() functions.
17509 Closes ticket 13827; patch from Pingl.
17510 - Remove redundant behavior of is_sensitive_dir_purpose, refactor to
17511 use only purpose_needs_anonymity. Closes part of ticket 20077.
17512 - The code to generate and parse EXTEND and EXTEND2 cells has been
17513 replaced with code automatically generated by the
17517 - Include the "TBits" unit in Tor's man page. Fixes part of bug
17518 20622; bugfix on 0.2.5.1-alpha.
17519 - Change '1' to 'weight_scale' in consensus bw weights calculation
17520 comments, as that is reality. Closes ticket 20273. Patch
17522 - Correct the value for AuthDirGuardBWGuarantee in the manpage, from
17523 250 KBytes to 2 MBytes. Fixes bug 20435; bugfix
17525 - Stop the man page from incorrectly stating that HiddenServiceDir
17526 must already exist. Fixes 20486.
17527 - Clarify that when ClientRejectInternalAddresses is enabled (which
17528 is the default), multicast DNS hostnames for machines on the local
17529 network (of the form *.local) are also rejected. Closes
17532 o Removed features:
17533 - The AuthDirMaxServersPerAuthAddr option no longer exists: The same
17534 limit for relays running on a single IP applies to authority IP
17535 addresses as well as to non-authority IP addresses. Closes
17537 - The UseDirectoryGuards torrc option no longer exists: all users
17538 that use entry guards will also use directory guards. Related to
17539 proposal 271; implements part of ticket 20831.
17542 - New unit tests for tor_htonll(). Closes ticket 19563. Patch
17543 from "overcaffeinated".
17544 - Perform the coding style checks when running the tests and fail
17545 when coding style violations are found. Closes ticket 5500.
17546 - Add tests for networkstatus_compute_bw_weights_v10.
17547 - Add unit tests circuit_predict_and_launch_new.
17548 - Extract dummy_origin_circuit_new so it can be used by other
17552 Changes in version 0.2.8.12 - 2016-12-19
17553 Tor 0.2.8.12 backports a fix for a medium-severity issue (bug 21018
17554 below) where Tor clients could crash when attempting to visit a
17555 hostile hidden service. Clients are recommended to upgrade as packages
17556 become available for their systems.
17558 It also includes an updated list of fallback directories, backported
17561 Now that the Tor 0.2.9 series is stable, only major bugfixes will be
17562 backported to 0.2.8 in the future.
17564 o Major bugfixes (parsing, security, backported from 0.2.9.8):
17565 - Fix a bug in parsing that could cause clients to read a single
17566 byte past the end of an allocated region. This bug could be used
17567 to cause hardened clients (built with --enable-expensive-hardening)
17568 to crash if they tried to visit a hostile hidden service. Non-
17569 hardened clients are only affected depending on the details of
17570 their platform's memory allocator. Fixes bug 21018; bugfix on
17571 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
17572 2016-12-002 and as CVE-2016-1254.
17574 o Minor features (fallback directory list, backported from 0.2.9.8):
17575 - Replace the 81 remaining fallbacks of the 100 originally
17576 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
17577 fallbacks (123 new, 54 existing, 27 removed) generated in December
17578 2016. Resolves ticket 20170.
17580 o Minor features (geoip, backported from 0.2.9.7-rc):
17581 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
17585 Changes in version 0.2.9.8 - 2016-12-19
17586 Tor 0.2.9.8 is the first stable release of the Tor 0.2.9 series.
17588 The Tor 0.2.9 series makes mandatory a number of security features
17589 that were formerly optional. It includes support for a new shared-
17590 randomness protocol that will form the basis for next generation
17591 hidden services, includes a single-hop hidden service mode for
17592 optimizing .onion services that don't actually want to be hidden,
17593 tries harder not to overload the directory authorities with excessive
17594 downloads, and supports a better protocol versioning scheme for
17595 improved compatibility with other implementations of the Tor protocol.
17597 And of course, there are numerous other bugfixes and improvements.
17599 This release also includes a fix for a medium-severity issue (bug
17600 21018 below) where Tor clients could crash when attempting to visit a
17601 hostile hidden service. Clients are recommended to upgrade as packages
17602 become available for their systems.
17604 Below are the changes since 0.2.9.7-rc. For a list of all changes
17605 since 0.2.8, see the ReleaseNotes file.
17607 o Major bugfixes (parsing, security):
17608 - Fix a bug in parsing that could cause clients to read a single
17609 byte past the end of an allocated region. This bug could be used
17610 to cause hardened clients (built with --enable-expensive-hardening)
17611 to crash if they tried to visit a hostile hidden service. Non-
17612 hardened clients are only affected depending on the details of
17613 their platform's memory allocator. Fixes bug 21018; bugfix on
17614 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
17615 2016-12-002 and as CVE-2016-1254.
17617 o Minor features (fallback directory list):
17618 - Replace the 81 remaining fallbacks of the 100 originally
17619 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
17620 fallbacks (123 new, 54 existing, 27 removed) generated in December
17621 2016. Resolves ticket 20170.
17624 Changes in version 0.2.9.7-rc - 2016-12-12
17625 Tor 0.2.9.7-rc fixes a few small bugs remaining in Tor 0.2.9.6-rc,
17626 including a few that had prevented tests from passing on
17629 o Minor features (geoip):
17630 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
17633 o Minor bugfix (build):
17634 - The current Git revision when building from a local repository is
17635 now detected correctly when using git worktrees. Fixes bug 20492;
17636 bugfix on 0.2.3.9-alpha.
17638 o Minor bugfixes (directory authority):
17639 - When computing old Tor protocol line version in protover, we were
17640 looking at 0.2.7.5 twice instead of a specific case for
17641 0.2.9.1-alpha. Fixes bug 20810; bugfix on 0.2.9.4-alpha.
17643 o Minor bugfixes (download scheduling):
17644 - Resolve a "bug" warning when considering a download schedule whose
17645 delay had approached INT_MAX. Fixes 20875; bugfix on 0.2.9.5-alpha.
17647 o Minor bugfixes (logging):
17648 - Downgrade a harmless log message about the
17649 pending_entry_connections list from "warn" to "info". Mitigates
17652 o Minor bugfixes (memory leak):
17653 - Fix a small memory leak when receiving AF_UNIX connections on a
17654 SocksPort. Fixes bug 20716; bugfix on 0.2.6.3-alpha.
17655 - When moving a signed descriptor object from a source to an
17656 existing destination, free the allocated memory inside that
17657 destination object. Fixes bug 20715; bugfix on 0.2.8.3-alpha.
17659 o Minor bugfixes (memory leak, use-after-free, linux seccomp2 sandbox):
17660 - Fix a memory leak and use-after-free error when removing entries
17661 from the sandbox's getaddrinfo() cache. Fixes bug 20710; bugfix on
17662 0.2.5.5-alpha. Patch from "cypherpunks".
17664 o Minor bugfixes (portability):
17665 - Use the correct spelling of MAC_OS_X_VERSION_10_12 on configure.ac
17666 Fixes bug 20935; bugfix on 0.2.9.6-rc.
17668 o Minor bugfixes (unit tests):
17669 - Stop expecting NetBSD unit tests to report success for ipfw. Part
17670 of a fix for bug 19960; bugfix on 0.2.9.5-alpha.
17671 - Fix tolerances in unit tests for monotonic time comparisons
17672 between nanoseconds and microseconds. Previously, we accepted a 10
17673 us difference only, which is not realistic on every platform's
17674 clock_gettime(). Fixes bug 19974; bugfix on 0.2.9.1-alpha.
17675 - Remove a double-free in the single onion service unit test. Stop
17676 ignoring a return value. Make future changes less error-prone.
17677 Fixes bug 20864; bugfix on 0.2.9.6-rc.
17680 Changes in version 0.2.8.11 - 2016-12-08
17681 Tor 0.2.8.11 backports fixes for additional portability issues that
17682 could prevent Tor from building correctly on OSX Sierra, or with
17683 OpenSSL 1.1. Affected users should upgrade; others can safely stay
17686 o Minor bugfixes (portability):
17687 - Avoid compilation errors when building on OSX Sierra. Sierra began
17688 to support the getentropy() and clock_gettime() APIs, but created
17689 a few problems in doing so. Tor 0.2.9 has a more thorough set of
17690 workarounds; in 0.2.8, we are just using the /dev/urandom and mach
17691 monotonic time interfaces. Fixes bug 20865. Bugfix
17694 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
17695 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
17696 architectures. Closes ticket 20588.
17699 Changes in version 0.2.8.10 - 2016-12-02
17700 Tor 0.2.8.10 backports a fix for a bug that would sometimes make clients
17701 unusable after they left standby mode. It also backports fixes for
17702 a few portability issues and a small but problematic memory leak.
17704 o Major bugfixes (client reliability, backport from 0.2.9.5-alpha):
17705 - When Tor leaves standby because of a new application request, open
17706 circuits as needed to serve that request. Previously, we would
17707 potentially wait a very long time. Fixes part of bug 19969; bugfix
17710 o Major bugfixes (client performance, backport from 0.2.9.5-alpha):
17711 - Clients now respond to new application stream requests immediately
17712 when they arrive, rather than waiting up to one second before
17713 starting to handle them. Fixes part of bug 19969; bugfix
17716 o Minor bugfixes (portability, backport from 0.2.9.6-rc):
17717 - Work around a bug in the OSX 10.12 SDK that would prevent us from
17718 successfully targeting earlier versions of OSX. Resolves
17721 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
17722 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
17723 20551; bugfix on 0.2.1.1-alpha.
17725 o Minor bugfixes (relay, backport from 0.2.9.5-alpha):
17726 - Work around a memory leak in OpenSSL 1.1 when encoding public
17727 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
17729 o Minor features (geoip):
17730 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
17733 Changes in version 0.2.9.6-rc - 2016-12-02
17734 Tor 0.2.9.6-rc fixes a few remaining bugs found in the previous alpha
17735 version. We hope that it will be ready to become stable soon, and we
17736 encourage everyone to test this release. If no showstopper bugs are
17737 found here, the next 0.2.9 release will be stable.
17739 o Major bugfixes (relay, resolver, logging):
17740 - For relays that don't know their own address, avoid attempting a
17741 local hostname resolve for each descriptor we download. This
17742 will cut down on the number of "Success: chose address 'x.x.x.x'"
17743 log lines, and also avoid confusing clock jumps if the resolver
17744 is slow. Fixes bugs 20423 and 20610; bugfix on 0.2.8.1-alpha.
17746 o Minor bugfixes (client, fascistfirewall):
17747 - Avoid spurious warnings when ReachableAddresses or FascistFirewall
17748 is set. Fixes bug 20306; bugfix on 0.2.8.2-alpha.
17750 o Minor bugfixes (hidden services):
17751 - Stop ignoring the anonymity status of saved keys for hidden
17752 services and single onion services when first starting tor.
17753 Instead, refuse to start tor if any hidden service key has been
17754 used in a different hidden service anonymity mode. Fixes bug
17755 20638; bugfix on 17178 in 0.2.9.3-alpha; reported by ahf.
17757 o Minor bugfixes (portability):
17758 - Work around a bug in the OSX 10.12 SDK that would prevent us from
17759 successfully targeting earlier versions of OSX. Resolves
17761 - Run correctly when built on Windows build environments that
17762 require _vcsprintf(). Fixes bug 20560; bugfix on 0.2.2.11-alpha.
17764 o Minor bugfixes (single onion services, Tor2web):
17765 - Stop complaining about long-term one-hop circuits deliberately
17766 created by single onion services and Tor2web. These log messages
17767 are intended to diagnose issue 8387, which relates to circuits
17768 hanging around forever for no reason. Fixes bug 20613; bugfix on
17769 0.2.9.1-alpha. Reported by "pastly".
17771 o Minor bugfixes (unit tests):
17772 - Stop spurious failures in the local interface address discovery
17773 unit tests. Fixes bug 20634; bugfix on 0.2.8.1-alpha; patch by
17777 - Correct the minimum bandwidth value in torrc.sample, and queue a
17778 corresponding change for torrc.minimal. Closes ticket 20085.
17781 Changes in version 0.2.9.5-alpha - 2016-11-08
17782 Tor 0.2.9.5-alpha fixes numerous bugs discovered in the previous alpha
17783 version. We believe one or two probably remain, and we encourage
17784 everyone to test this release.
17786 o Major bugfixes (client performance):
17787 - Clients now respond to new application stream requests immediately
17788 when they arrive, rather than waiting up to one second before
17789 starting to handle them. Fixes part of bug 19969; bugfix
17792 o Major bugfixes (client reliability):
17793 - When Tor leaves standby because of a new application request, open
17794 circuits as needed to serve that request. Previously, we would
17795 potentially wait a very long time. Fixes part of bug 19969; bugfix
17798 o Major bugfixes (download scheduling):
17799 - When using an exponential backoff schedule, do not give up on
17800 downloading just because we have failed a bunch of times. Since
17801 each delay is longer than the last, retrying indefinitely won't
17802 hurt. Fixes bug 20536; bugfix on 0.2.9.1-alpha.
17803 - If a consensus expires while we are waiting for certificates to
17804 download, stop waiting for certificates.
17805 - If we stop waiting for certificates less than a minute after we
17806 started downloading them, do not consider the certificate download
17807 failure a separate failure. Fixes bug 20533; bugfix
17809 - Remove the maximum delay on exponential-backoff scheduling. Since
17810 we now allow an infinite number of failures (see ticket 20536), we
17811 must now allow the time to grow longer on each failure. Fixes part
17812 of bug 20534; bugfix on 0.2.9.1-alpha.
17813 - Make our initial download delays closer to those from 0.2.8. Fixes
17814 another part of bug 20534; bugfix on 0.2.9.1-alpha.
17815 - When determining when to download a directory object, handle times
17816 after 2038 if the operating system supports them. (Someday this
17817 will be important!) Fixes bug 20587; bugfix on 0.2.8.1-alpha.
17818 - When using exponential backoff in test networks, use a lower
17819 exponent, so the delays do not vary as much. This helps test
17820 networks bootstrap consistently. Fixes bug 20597; bugfix on 20499.
17822 o Minor features (geoip):
17823 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
17826 o Minor bugfixes (client directory scheduling):
17827 - Treat "relay too busy to answer request" as a failed request and a
17828 reason to back off on our retry frequency. This is safe now that
17829 exponential backoffs retry indefinitely, and avoids a bug where we
17830 would reset our download schedule erroneously. Fixes bug 20593;
17831 bugfix on 0.2.9.1-alpha.
17833 o Minor bugfixes (client, logging):
17834 - Remove a BUG warning in circuit_pick_extend_handshake(). Instead,
17835 assume all nodes support EXTEND2. Use ntor whenever a key is
17836 available. Fixes bug 20472; bugfix on 0.2.9.3-alpha.
17837 - On DNSPort, stop logging a BUG warning on a failed hostname
17838 lookup. Fixes bug 19869; bugfix on 0.2.9.1-alpha.
17840 o Minor bugfixes (hidden services):
17841 - When configuring hidden services, check every hidden service
17842 directory's permissions. Previously, we only checked the last
17843 hidden service. Fixes bug 20529; bugfix the work to fix 13942
17846 o Minor bugfixes (portability):
17847 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
17848 architectures. Closes ticket 20588.
17849 - Use ECDHE ciphers instead of ECDH in tortls tests. LibreSSL has
17850 removed the ECDH ciphers which caused the tests to fail on
17851 platforms which use it. Fixes bug 20460; bugfix on 0.2.8.1-alpha.
17852 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
17853 20551; bugfix on 0.2.1.1-alpha.
17855 o Minor bugfixes (relay bootstrap):
17856 - Ensure relays don't make multiple connections during bootstrap.
17857 Fixes bug 20591; bugfix on 0.2.8.1-alpha.
17859 o Minor bugfixes (relay):
17860 - Work around a memory leak in OpenSSL 1.1 when encoding public
17861 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
17862 - Avoid a small memory leak when informing worker threads about
17863 rotated onion keys. Fixes bug 20401; bugfix on 0.2.6.3-alpha.
17864 - Do not try to parallelize workers more than 16x without the user
17865 explicitly configuring us to do so, even if we do detect more than
17866 16 CPU cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
17868 o Minor bugfixes (single onion services):
17869 - Start correctly when creating a single onion service in a
17870 directory that did not previously exist. Fixes bug 20484; bugfix
17873 o Minor bugfixes (testing):
17874 - Avoid a unit test failure on systems with over 16 detectable CPU
17875 cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
17878 - Clarify that setting HiddenServiceNonAnonymousMode requires you to
17879 also set "SOCKSPort 0". Fixes bug 20487; bugfix on 0.2.9.3-alpha.
17880 - Module-level documentation for several more modules. Closes
17881 tickets 19287 and 19290.
17884 Changes in version 0.2.8.9 - 2016-10-17
17885 Tor 0.2.8.9 backports a fix for a security hole in previous versions
17886 of Tor that would allow a remote attacker to crash a Tor client,
17887 hidden service, relay, or authority. All Tor users should upgrade to
17888 this version, or to 0.2.9.4-alpha. Patches will be released for older
17891 o Major features (security fixes, also in 0.2.9.4-alpha):
17892 - Prevent a class of security bugs caused by treating the contents
17893 of a buffer chunk as if they were a NUL-terminated string. At
17894 least one such bug seems to be present in all currently used
17895 versions of Tor, and would allow an attacker to remotely crash
17896 most Tor instances, especially those compiled with extra compiler
17897 hardening. With this defense in place, such bugs can't crash Tor,
17898 though we should still fix them as they occur. Closes ticket
17899 20384 (TROVE-2016-10-001).
17901 o Minor features (geoip):
17902 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
17906 Changes in version 0.2.9.4-alpha - 2016-10-17
17907 Tor 0.2.9.4-alpha fixes a security hole in previous versions of Tor
17908 that would allow a remote attacker to crash a Tor client, hidden
17909 service, relay, or authority. All Tor users should upgrade to this
17910 version, or to 0.2.8.9. Patches will be released for older versions
17913 Tor 0.2.9.4-alpha also adds numerous small features and fix-ups to
17914 previous versions of Tor, including the implementation of a feature to
17915 future- proof the Tor ecosystem against protocol changes, some bug
17916 fixes necessary for Tor Browser to use unix domain sockets correctly,
17917 and several portability improvements. We anticipate that this will be
17918 the last alpha in the Tor 0.2.9 series, and that the next release will
17919 be a release candidate.
17921 o Major features (security fixes):
17922 - Prevent a class of security bugs caused by treating the contents
17923 of a buffer chunk as if they were a NUL-terminated string. At
17924 least one such bug seems to be present in all currently used
17925 versions of Tor, and would allow an attacker to remotely crash
17926 most Tor instances, especially those compiled with extra compiler
17927 hardening. With this defense in place, such bugs can't crash Tor,
17928 though we should still fix them as they occur. Closes ticket
17929 20384 (TROVE-2016-10-001).
17931 o Major features (subprotocol versions):
17932 - Tor directory authorities now vote on a set of recommended
17933 subprotocol versions, and on a set of required subprotocol
17934 versions. Clients and relays that lack support for a _required_
17935 subprotocol version will not start; those that lack support for a
17936 _recommended_ subprotocol version will warn the user to upgrade.
17937 Closes ticket 19958; implements part of proposal 264.
17938 - Tor now uses "subprotocol versions" to indicate compatibility.
17939 Previously, versions of Tor looked at the declared Tor version of
17940 a relay to tell whether they could use a given feature. Now, they
17941 should be able to rely on its declared subprotocol versions. This
17942 change allows compatible implementations of the Tor protocol(s) to
17943 exist without pretending to be 100% bug-compatible with particular
17944 releases of Tor itself. Closes ticket 19958; implements part of
17947 o Minor feature (fallback directories):
17948 - Remove broken fallbacks from the hard-coded fallback directory
17949 list. Closes ticket 20190; patch by teor.
17951 o Minor features (client, directory):
17952 - Since authorities now omit all routers that lack the Running and
17953 Valid flags, we assume that any relay listed in the consensus must
17954 have those flags. Closes ticket 20001; implements part of
17957 o Minor features (compilation, portability):
17958 - Compile correctly on MacOS 10.12 (aka "Sierra"). Closes
17961 o Minor features (development tools, etags):
17962 - Teach the "make tags" Makefile target how to correctly find
17963 "MOCK_IMPL" function definitions. Patch from nherring; closes
17966 o Minor features (geoip):
17967 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
17970 o Minor features (unix domain sockets):
17971 - When configuring a unix domain socket for a SocksPort,
17972 ControlPort, or Hidden service, you can now wrap the address in
17973 quotes, using C-style escapes inside the quotes. This allows unix
17974 domain socket paths to contain spaces.
17976 o Minor features (virtual addresses):
17977 - Increase the maximum number of bits for the IPv6 virtual network
17978 prefix from 16 to 104. In this way, the condition for address
17979 allocation is less restrictive. Closes ticket 20151; feature
17982 o Minor bugfixes (address discovery):
17983 - Stop reordering IP addresses returned by the OS. This makes it
17984 more likely that Tor will guess the same relay IP address every
17985 time. Fixes issue 20163; bugfix on 0.2.7.1-alpha, ticket 17027.
17986 Reported by René Mayrhofer, patch by "cypherpunks".
17988 o Minor bugfixes (client, unix domain sockets):
17989 - Disable IsolateClientAddr when using AF_UNIX backed SocksPorts as
17990 the client address is meaningless. Fixes bug 20261; bugfix
17993 o Minor bugfixes (compilation, OpenBSD):
17994 - Detect Libevent2 functions correctly on systems that provide
17995 libevent2, but where libevent1 is linked with -levent. Fixes bug
17996 19904; bugfix on 0.2.2.24-alpha. Patch from Rubiate.
17998 o Minor bugfixes (configuration):
17999 - When parsing quoted configuration values from the torrc file,
18000 handle windows line endings correctly. Fixes bug 19167; bugfix on
18001 0.2.0.16-alpha. Patch from "Pingl".
18003 o Minor bugfixes (getpass):
18004 - Defensively fix a non-triggerable heap corruption at do_getpass()
18005 to protect ourselves from mistakes in the future. Fixes bug
18006 19223; bugfix on 0.2.7.3-rc. Bug found by Guido Vranken, patch
18009 o Minor bugfixes (hidden service):
18010 - Allow hidden services to run on IPv6 addresses even when the
18011 IPv6Exit option is not set. Fixes bug 18357; bugfix
18015 - Add module-level internal documentation for 36 C files that
18016 previously didn't have a high-level overview. Closes ticket #20385.
18018 o Required libraries:
18019 - When building with OpenSSL, Tor now requires version 1.0.1 or
18020 later. OpenSSL 1.0.0 and earlier are no longer supported by the
18021 OpenSSL team, and should not be used. Closes ticket 20303.
18024 Changes in version 0.2.9.3-alpha - 2016-09-23
18025 Tor 0.2.9.3-alpha adds improved support for entities that want to make
18026 high-performance services available through the Tor .onion mechanism
18027 without themselves receiving anonymity as they host those services. It
18028 also tries harder to ensure that all steps on a circuit are using the
18029 strongest crypto possible, strengthens some TLS properties, and
18030 resolves several bugs -- including a pair of crash bugs from the 0.2.8
18031 series. Anybody running an earlier version of 0.2.9.x should upgrade.
18033 o Major bugfixes (crash, also in 0.2.8.8):
18034 - Fix a complicated crash bug that could affect Tor clients
18035 configured to use bridges when replacing a networkstatus consensus
18036 in which one of their bridges was mentioned. OpenBSD users saw
18037 more crashes here, but all platforms were potentially affected.
18038 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
18040 o Major bugfixes (relay, OOM handler, also in 0.2.8.8):
18041 - Fix a timing-dependent assertion failure that could occur when we
18042 tried to flush from a circuit after having freed its cells because
18043 of an out-of-memory condition. Fixes bug 20203; bugfix on
18044 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
18047 o Major features (circuit building, security):
18048 - Authorities, relays and clients now require ntor keys in all
18049 descriptors, for all hops (except for rare hidden service protocol
18050 cases), for all circuits, and for all other roles. Part of
18052 - Tor authorities, relays, and clients only use ntor, except for
18053 rare cases in the hidden service protocol. Part of ticket 19163.
18055 o Major features (single-hop "hidden" services):
18056 - Add experimental HiddenServiceSingleHopMode and
18057 HiddenServiceNonAnonymousMode options. When both are set to 1,
18058 every hidden service on a Tor instance becomes a non-anonymous
18059 Single Onion Service. Single Onions make one-hop (direct)
18060 connections to their introduction and rendezvous points. One-hop
18061 circuits make Single Onion servers easily locatable, but clients
18062 remain location-anonymous. This is compatible with the existing
18063 hidden service implementation, and works on the current tor
18064 network without any changes to older relays or clients. Implements
18065 proposal 260, completes ticket 17178. Patch by teor and asn.
18067 o Major features (resource management):
18068 - Tor can now notice it is about to run out of sockets, and
18069 preemptively close connections of lower priority. (This feature is
18070 off by default for now, since the current prioritizing method is
18071 yet not mature enough. You can enable it by setting
18072 "DisableOOSCheck 0", but watch out: it might close some sockets
18073 you would rather have it keep.) Closes ticket 18640.
18075 o Major bugfixes (circuit building):
18076 - Hidden service client-to-intro-point and service-to-rendezvous-
18077 point circuits use the TAP key supplied by the protocol, to avoid
18078 epistemic attacks. Fixes bug 19163; bugfix on 0.2.4.18-rc.
18080 o Major bugfixes (compilation, OpenBSD):
18081 - Fix a Libevent-detection bug in our autoconf script that would
18082 prevent Tor from linking successfully on OpenBSD. Patch from
18083 rubiate. Fixes bug 19902; bugfix on 0.2.9.1-alpha.
18085 o Major bugfixes (hidden services):
18086 - Clients now require hidden services to include the TAP keys for
18087 their intro points in the hidden service descriptor. This prevents
18088 an inadvertent upgrade to ntor, which a malicious hidden service
18089 could use to distinguish clients by consensus version. Fixes bug
18090 20012; bugfix on 0.2.4.8-alpha. Patch by teor.
18092 o Minor features (security, TLS):
18093 - Servers no longer support clients that without AES ciphersuites.
18094 (3DES is no longer considered an acceptable cipher.) We believe
18095 that no such Tor clients currently exist, since Tor has required
18096 OpenSSL 0.9.7 or later since 2009. Closes ticket 19998.
18098 o Minor feature (fallback directories):
18099 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
18100 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
18101 2016. Closes ticket 20190; patch by teor.
18103 o Minor features (geoip, also in 0.2.8.8):
18104 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
18107 o Minor feature (port flags):
18108 - Add new flags to the *Port options to finer control over which
18109 requests are allowed. The flags are NoDNSRequest, NoOnionTraffic,
18110 and the synthetic flag OnionTrafficOnly, which is equivalent to
18111 NoDNSRequest, NoIPv4Traffic, and NoIPv6Traffic. Closes enhancement
18112 18693; patch by "teor".
18114 o Minor features (directory authority):
18115 - After voting, if the authorities decide that a relay is not
18116 "Valid", they no longer include it in the consensus at all. Closes
18117 ticket 20002; implements part of proposal 272.
18119 o Minor features (testing):
18120 - Disable memory protections on OpenBSD when performing our unit
18121 tests for memwipe(). The test deliberately invokes undefined
18122 behavior, and the OpenBSD protections interfere with this. Patch
18123 from "rubiate". Closes ticket 20066.
18125 o Minor features (testing, ipv6):
18126 - Add the single-onion and single-onion-ipv6 chutney targets to
18127 "make test-network-all". This requires a recent chutney version
18128 with the single onion network flavours (git c72a652 or later).
18129 Closes ticket 20072; patch by teor.
18130 - Add the hs-ipv6 chutney target to make test-network-all's IPv6
18131 tests. Remove bridges+hs, as it's somewhat redundant. This
18132 requires a recent chutney version that supports IPv6 clients,
18133 relays, and authorities. Closes ticket 20069; patch by teor.
18135 o Minor features (Tor2web):
18136 - Make Tor2web clients respect ReachableAddresses. This feature was
18137 inadvertently enabled in 0.2.8.6, then removed by bugfix 19973 on
18138 0.2.8.7. Implements feature 20034. Patch by teor.
18140 o Minor features (unit tests):
18141 - We've done significant work to make the unit tests run faster.
18142 - Our link-handshake unit tests now check that when invalid
18143 handshakes fail, they fail with the error messages we expected.
18144 - Our unit testing code that captures log messages no longer
18145 prevents them from being written out if the user asked for them
18146 (by passing --debug or --info or or --notice --warn to the "test"
18147 binary). This change prevents us from missing unexpected log
18148 messages simply because we were looking for others. Related to
18150 - The unit tests now log all warning messages with the "BUG" flag.
18151 Previously, they only logged errors by default. This change will
18152 help us make our testing code more correct, and make sure that we
18153 only hit this code when we mean to. In the meantime, however,
18154 there will be more warnings in the unit test logs than before.
18155 This is preparatory work for ticket 19999.
18156 - The unit tests now treat any failure of a "tor_assert_nonfatal()"
18157 assertion as a test failure.
18159 o Minor bug fixes (circuits):
18160 - Use the CircuitBuildTimeout option whenever
18161 LearnCircuitBuildTimeout is disabled. Previously, we would respect
18162 the option when a user disabled it, but not when it was disabled
18163 because some other option was set. Fixes bug 20073; bugfix on
18164 0.2.4.12-alpha. Patch by teor.
18166 o Minor bugfixes (allocation):
18167 - Change how we allocate memory for large chunks on buffers, to
18168 avoid a (currently impossible) integer overflow, and to waste less
18169 space when allocating unusually large chunks. Fixes bug 20081;
18170 bugfix on 0.2.0.16-alpha. Issue identified by Guido Vranken.
18171 - Always include orconfig.h before including any other C headers.
18172 Sometimes, it includes macros that affect the behavior of the
18173 standard headers. Fixes bug 19767; bugfix on 0.2.9.1-alpha (the
18174 first version to use AC_USE_SYSTEM_EXTENSIONS).
18175 - Fix a syntax error in the IF_BUG_ONCE__() macro in non-GCC-
18176 compatible compilers. Fixes bug 20141; bugfix on 0.2.9.1-alpha.
18177 Patch from Gisle Vanem.
18178 - Stop trying to build with Clang 4.0's -Wthread-safety warnings.
18179 They apparently require a set of annotations that we aren't
18180 currently using, and they create false positives in our pthreads
18181 wrappers. Fixes bug 20110; bugfix on 0.2.9.1-alpha.
18183 o Minor bugfixes (directory authority):
18184 - Die with a more useful error when the operator forgets to place
18185 the authority_signing_key file into the keys directory. This
18186 avoids an uninformative assert & traceback about having an invalid
18187 key. Fixes bug 20065; bugfix on 0.2.0.1-alpha.
18188 - When allowing private addresses, mark Exits that only exit to
18189 private locations as such. Fixes bug 20064; bugfix
18192 o Minor bugfixes (documentation):
18193 - Document the default PathsNeededToBuildCircuits value that's used
18194 by clients when the directory authorities don't set
18195 min_paths_for_circs_pct. Fixes bug 20117; bugfix on 02c320916e02
18196 in 0.2.4.10-alpha. Patch by teor, reported by Jesse V.
18197 - Fix manual for the User option: it takes a username, not a UID.
18198 Fixes bug 19122; bugfix on 0.0.2pre16 (the first version to have
18201 o Minor bugfixes (hidden services):
18202 - Stop logging intro point details to the client log on certain
18203 error conditions. Fixed as part of bug 20012; bugfix on
18204 0.2.4.8-alpha. Patch by teor.
18206 o Minor bugfixes (IPv6, testing):
18207 - Check for IPv6 correctly on Linux when running test networks.
18208 Fixes bug 19905; bugfix on 0.2.7.3-rc; patch by teor.
18210 o Minor bugfixes (Linux seccomp2 sandbox):
18211 - Add permission to run the sched_yield() and sigaltstack() system
18212 calls, in order to support versions of Tor compiled with asan or
18213 ubsan code that use these calls. Now "sandbox 1" and
18214 "--enable-expensive-hardening" should be compatible on more
18215 systems. Fixes bug 20063; bugfix on 0.2.5.1-alpha.
18217 o Minor bugfixes (logging):
18218 - When logging a message from the BUG() macro, be explicit about
18219 what we were asserting. Previously we were confusing what we were
18220 asserting with what the bug was. Fixes bug 20093; bugfix
18222 - When we are unable to remove the bw_accounting file, do not warn
18223 if the reason we couldn't remove it was that it didn't exist.
18224 Fixes bug 19964; bugfix on 0.2.5.4-alpha. Patch from 'pastly'.
18226 o Minor bugfixes (option parsing):
18227 - Count unix sockets when counting client listeners (SOCKS, Trans,
18228 NATD, and DNS). This has no user-visible behaviour changes: these
18229 options are set once, and never read. Required for correct
18230 behaviour in ticket 17178. Fixes bug 19677; bugfix on
18231 0.2.6.3-alpha. Patch by teor.
18233 o Minor bugfixes (options):
18234 - Check the consistency of UseEntryGuards and EntryNodes more
18235 reliably. Fixes bug 20074; bugfix on 0.2.4.12-alpha. Patch
18237 - Stop changing the configured value of UseEntryGuards on
18238 authorities and Tor2web clients. Fixes bug 20074; bugfix on
18239 commits 51fc6799 in 0.1.1.16-rc and acda1735 in 0.2.4.3-alpha.
18242 o Minor bugfixes (Tor2web):
18243 - Prevent Tor2web clients running hidden services, these services
18244 are not anonymous due to the one-hop client paths. Fixes bug
18245 19678. Patch by teor.
18247 o Minor bugfixes (unit tests):
18248 - Fix a shared-random unit test that was failing on big endian
18249 architectures due to internal representation of a integer copied
18250 to a buffer. The test is changed to take a full 32 bytes of data
18251 and use the output of a python script that make the COMMIT and
18252 REVEAL calculation according to the spec. Fixes bug 19977; bugfix
18254 - The tor_tls_server_info_callback unit test no longer crashes when
18255 debug-level logging is turned on. Fixes bug 20041; bugfix
18259 Changes in version 0.2.8.8 - 2016-09-23
18260 Tor 0.2.8.8 fixes two crash bugs present in previous versions of the
18261 0.2.8.x series. Relays running 0.2.8.x should upgrade, as should users
18262 who select public relays as their bridges.
18264 o Major bugfixes (crash):
18265 - Fix a complicated crash bug that could affect Tor clients
18266 configured to use bridges when replacing a networkstatus consensus
18267 in which one of their bridges was mentioned. OpenBSD users saw
18268 more crashes here, but all platforms were potentially affected.
18269 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
18271 o Major bugfixes (relay, OOM handler):
18272 - Fix a timing-dependent assertion failure that could occur when we
18273 tried to flush from a circuit after having freed its cells because
18274 of an out-of-memory condition. Fixes bug 20203; bugfix on
18275 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
18278 o Minor feature (fallback directories):
18279 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
18280 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
18281 2016. Closes ticket 20190; patch by teor.
18283 o Minor features (geoip):
18284 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
18288 Changes in version 0.2.9.2-alpha - 2016-08-24
18289 Tor 0.2.9.2-alpha continues development of the 0.2.9 series with
18290 several new features and bugfixes. It also includes an important
18291 authority update and an important bugfix from 0.2.8.7. Everyone who
18292 sets the ReachableAddresses option, and all bridges, are strongly
18293 encouraged to upgrade to 0.2.8.7, or to 0.2.9.2-alpha.
18295 o Directory authority changes (also in 0.2.8.7):
18296 - The "Tonga" bridge authority has been retired; the new bridge
18297 authority is "Bifroest". Closes tickets 19728 and 19690.
18299 o Major bugfixes (client, security, also in 0.2.8.7):
18300 - Only use the ReachableAddresses option to restrict the first hop
18301 in a path. In earlier versions of 0.2.8.x, it would apply to
18302 every hop in the path, with a possible degradation in anonymity
18303 for anyone using an uncommon ReachableAddress setting. Fixes bug
18304 19973; bugfix on 0.2.8.2-alpha.
18306 o Major features (user interface):
18307 - Tor now supports the ability to declare options deprecated, so
18308 that we can recommend that people stop using them. Previously,
18309 this was done in an ad-hoc way. Closes ticket 19820.
18311 o Major bugfixes (directory downloads):
18312 - Avoid resetting download status for consensuses hourly, since we
18313 already have another, smarter retry mechanism. Fixes bug 8625;
18314 bugfix on 0.2.0.9-alpha.
18316 o Minor features (config):
18317 - Warn users when descriptor and port addresses are inconsistent.
18318 Mitigates bug 13953; patch by teor.
18320 o Minor features (geoip):
18321 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
18324 o Minor features (user interface):
18325 - There is a new --list-deprecated-options command-line option to
18326 list all of the deprecated options. Implemented as part of
18329 o Minor bugfixes (code style):
18330 - Fix an integer signedness conversion issue in the case conversion
18331 tables. Fixes bug 19168; bugfix on 0.2.1.11-alpha.
18333 o Minor bugfixes (compilation):
18334 - Build correctly on versions of libevent2 without support for
18335 evutil_secure_rng_add_bytes(). Fixes bug 19904; bugfix
18337 - Fix a compilation warning on GCC versions before 4.6. Our
18338 ENABLE_GCC_WARNING macro used the word "warning" as an argument,
18339 when it is also required as an argument to the compiler pragma.
18340 Fixes bug 19901; bugfix on 0.2.9.1-alpha.
18342 o Minor bugfixes (compilation, also in 0.2.8.7):
18343 - Remove an inappropriate "inline" in tortls.c that was causing
18344 warnings on older versions of GCC. Fixes bug 19903; bugfix
18347 o Minor bugfixes (fallback directories, also in 0.2.8.7):
18348 - Avoid logging a NULL string pointer when loading fallback
18349 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
18350 and 0.2.8.1-alpha. Report and patch by "rubiate".
18352 o Minor bugfixes (logging):
18353 - Log a more accurate message when we fail to dump a microdescriptor.
18354 Fixes bug 17758; bugfix on 0.2.2.8-alpha. Patch from Daniel Pinto.
18356 o Minor bugfixes (memory leak):
18357 - Fix a series of slow memory leaks related to parsing torrc files
18358 and options. Fixes bug 19466; bugfix on 0.2.1.6-alpha.
18360 o Deprecated features:
18361 - A number of DNS-cache-related sub-options for client ports are now
18362 deprecated for security reasons, and may be removed in a future
18363 version of Tor. (We believe that client-side DNS caching is a bad
18364 idea for anonymity, and you should not turn it on.) The options
18365 are: CacheDNS, CacheIPv4DNS, CacheIPv6DNS, UseDNSCache,
18366 UseIPv4Cache, and UseIPv6Cache.
18367 - A number of options are deprecated for security reasons, and may
18368 be removed in a future version of Tor. The options are:
18369 AllowDotExit, AllowInvalidNodes, AllowSingleHopCircuits,
18370 AllowSingleHopExits, ClientDNSRejectInternalAddresses,
18371 CloseHSClientCircuitsImmediatelyOnTimeout,
18372 CloseHSServiceRendCircuitsImmediatelyOnTimeout,
18373 ExcludeSingleHopRelays, FastFirstHopPK, TLSECGroup,
18374 UseNTorHandshake, and WarnUnsafeSocks.
18375 - The *ListenAddress options are now deprecated as unnecessary: the
18376 corresponding *Port options should be used instead. These options
18377 may someday be removed. The affected options are:
18378 ControlListenAddress, DNSListenAddress, DirListenAddress,
18379 NATDListenAddress, ORListenAddress, SocksListenAddress,
18380 and TransListenAddress.
18383 - Correct the IPv6 syntax in our documentation for the
18384 VirtualAddrNetworkIPv6 torrc option. Closes ticket 19743.
18387 - We no longer include the (dead, deprecated) bufferevent code in
18388 Tor. Closes ticket 19450. Based on a patch from U+039b.
18391 Changes in version 0.2.8.7 - 2016-08-24
18392 Tor 0.2.8.7 fixes an important bug related to the ReachableAddresses
18393 option in 0.2.8.6, and replaces a retiring bridge authority. Everyone
18394 who sets the ReachableAddresses option, and all bridges, are strongly
18395 encouraged to upgrade.
18397 o Directory authority changes:
18398 - The "Tonga" bridge authority has been retired; the new bridge
18399 authority is "Bifroest". Closes tickets 19728 and 19690.
18401 o Major bugfixes (client, security):
18402 - Only use the ReachableAddresses option to restrict the first hop
18403 in a path. In earlier versions of 0.2.8.x, it would apply to
18404 every hop in the path, with a possible degradation in anonymity
18405 for anyone using an uncommon ReachableAddress setting. Fixes bug
18406 19973; bugfix on 0.2.8.2-alpha.
18408 o Minor features (geoip):
18409 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
18412 o Minor bugfixes (compilation):
18413 - Remove an inappropriate "inline" in tortls.c that was causing
18414 warnings on older versions of GCC. Fixes bug 19903; bugfix
18417 o Minor bugfixes (fallback directories):
18418 - Avoid logging a NULL string pointer when loading fallback
18419 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
18420 and 0.2.8.1-alpha. Report and patch by "rubiate".
18423 Changes in version 0.2.9.1-alpha - 2016-08-08
18424 Tor 0.2.9.1-alpha is the first alpha release in the 0.2.9 development
18425 series. It improves our support for hardened builds and compiler
18426 warnings, deploys some critical infrastructure for improvements to
18427 hidden services, includes a new timing backend that we hope to use for
18428 better support for traffic padding, makes it easier for programmers to
18429 log unexpected events, and contains other small improvements to
18430 security, correctness, and performance.
18432 Below are the changes since 0.2.8.6.
18434 o New system requirements:
18435 - Tor now requires Libevent version 2.0.10-stable or later. Older
18436 versions of Libevent have less efficient backends for several
18437 platforms, and lack the DNS code that we use for our server-side
18438 DNS support. This implements ticket 19554.
18439 - Tor now requires zlib version 1.2 or later, for security,
18440 efficiency, and (eventually) gzip support. (Back when we started,
18441 zlib 1.1 and zlib 1.0 were still found in the wild. 1.2 was
18442 released in 2003. We recommend the latest version.)
18444 o Major features (build, hardening):
18445 - Tor now builds with -ftrapv by default on compilers that support
18446 it. This option detects signed integer overflow (which C forbids),
18447 and turns it into a hard-failure. We do not apply this option to
18448 code that needs to run in constant time to avoid side-channels;
18449 instead, we use -fwrapv in that code. Closes ticket 17983.
18450 - When --enable-expensive-hardening is selected, stop applying the
18451 clang/gcc sanitizers to code that needs to run in constant time.
18452 Although we are aware of no introduced side-channels, we are not
18453 able to prove that there are none. Related to ticket 17983.
18455 o Major features (compilation):
18456 - Our big list of extra GCC warnings is now enabled by default when
18457 building with GCC (or with anything like Clang that claims to be
18458 GCC-compatible). To make all warnings into fatal compilation
18459 errors, pass --enable-fatal-warnings to configure. Closes
18461 - Use the Autoconf macro AC_USE_SYSTEM_EXTENSIONS to automatically
18462 turn on C and POSIX extensions. (Previously, we attempted to do
18463 this on an ad hoc basis.) Closes ticket 19139.
18465 o Major features (directory authorities, hidden services):
18466 - Directory authorities can now perform the shared randomness
18467 protocol specified by proposal 250. Using this protocol, directory
18468 authorities generate a global fresh random value every day. In the
18469 future, this value will be used by hidden services to select
18470 HSDirs. This release implements the directory authority feature;
18471 the hidden service side will be implemented in the future as part
18472 of proposal 224. Resolves ticket 16943; implements proposal 250.
18474 o Major features (downloading, random exponential backoff):
18475 - When we fail to download an object from a directory service, wait
18476 for an (exponentially increasing) randomized amount of time before
18477 retrying, rather than a fixed interval as we did before. This
18478 prevents a group of Tor instances from becoming too synchronized,
18479 or a single Tor instance from becoming too predictable, in its
18480 download schedule. Closes ticket 15942.
18482 o Major bugfixes (exit policies):
18483 - Avoid disclosing exit outbound bind addresses, configured port
18484 bind addresses, and local interface addresses in relay descriptors
18485 by default under ExitPolicyRejectPrivate. Instead, only reject
18486 these (otherwise unlisted) addresses if
18487 ExitPolicyRejectLocalInterfaces is set. Fixes bug 18456; bugfix on
18488 0.2.7.2-alpha. Patch by teor.
18490 o Major bugfixes (hidden service client):
18491 - Allow Tor clients with appropriate controllers to work with
18492 FetchHidServDescriptors set to 0. Previously, this option also
18493 disabled descriptor cache lookup, thus breaking hidden services
18494 entirely. Fixes bug 18704; bugfix on 0.2.0.20-rc. Patch by "twim".
18496 o Minor features (build, hardening):
18497 - Detect and work around a libclang_rt problem that would prevent
18498 clang from finding __mulodi4() on some 32-bit platforms, and thus
18499 keep -ftrapv from linking on those systems. Closes ticket 19079.
18500 - When building on a system without runtime support for the runtime
18501 hardening options, try to log a useful warning at configuration
18502 time, rather than an incomprehensible warning at link time. If
18503 expensive hardening was requested, this warning becomes an error.
18504 Closes ticket 18895.
18506 o Minor features (code safety):
18507 - In our integer-parsing functions, ensure that maxiumum value we
18508 give is no smaller than the minimum value. Closes ticket 19063;
18511 o Minor features (controller):
18512 - Implement new GETINFO queries for all downloads that use
18513 download_status_t to schedule retries. This allows controllers to
18514 examine the schedule for pending downloads. Closes ticket 19323.
18515 - Allow controllers to configure basic client authorization on
18516 hidden services when they create them with the ADD_ONION control
18517 command. Implements ticket 15588. Patch by "special".
18518 - Fire a STATUS_SERVER controller event whenever the hibernation
18519 status changes between "awake"/"soft"/"hard". Closes ticket 18685.
18521 o Minor features (directory authority):
18522 - Directory authorities now only give the Guard flag to a relay if
18523 they are also giving it the Stable flag. This change allows us to
18524 simplify path selection for clients. It should have minimal effect
18525 in practice, since >99% of Guards already have the Stable flag.
18526 Implements ticket 18624.
18527 - Directory authorities now write their v3-status-votes file out to
18528 disk earlier in the consensus process, so we have a record of the
18529 votes even if we abort the consensus process. Resolves
18532 o Minor features (hidden service):
18533 - Stop being so strict about the payload length of "rendezvous1"
18534 cells. We used to be locked in to the "TAP" handshake length, and
18535 now we can handle better handshakes like "ntor". Resolves
18538 o Minor features (infrastructure, time):
18539 - Tor now uses the operating system's monotonic timers (where
18540 available) for internal fine-grained timing. Previously we would
18541 look at the system clock, and then attempt to compensate for the
18542 clock running backwards. Closes ticket 18908.
18543 - Tor now includes an improved timer backend, so that we can
18544 efficiently support tens or hundreds of thousands of concurrent
18545 timers, as will be needed for some of our planned anti-traffic-
18546 analysis work. This code is based on William Ahern's "timeout.c"
18547 project, which implements a "tickless hierarchical timing wheel".
18548 Closes ticket 18365.
18550 o Minor features (logging):
18551 - Provide a more useful warning message when configured with an
18552 invalid Nickname. Closes ticket 18300; patch from "icanhasaccount".
18553 - When dumping unparseable router descriptors, optionally store them
18554 in separate files, named by digest, up to a configurable size
18555 limit. You can change the size limit by setting the
18556 MaxUnparseableDescSizeToLog option, and disable this feature by
18557 setting that option to 0. Closes ticket 18322.
18558 - Add a set of macros to check nonfatal assertions, for internal
18559 use. Migrating more of our checks to these should help us avoid
18560 needless crash bugs. Closes ticket 18613.
18562 o Minor features (performance):
18563 - Change the "optimistic data" extension from "off by default" to
18564 "on by default". The default was ordinarily overridden by a
18565 consensus option, but when clients were bootstrapping for the
18566 first time, they would not have a consensus to get the option
18567 from. Changing this default saves a round-trip during startup.
18568 Closes ticket 18815.
18570 o Minor features (relay, usability):
18571 - When the directory authorities refuse a bad relay's descriptor,
18572 encourage the relay operator to contact us. Many relay operators
18573 won't notice this line in their logs, but it's a win if even a few
18574 learn why we don't like what their relay was doing. Resolves
18577 o Minor features (testing):
18578 - Let backtrace tests work correctly under AddressSanitizer. Fixes
18579 part of bug 18934; bugfix on 0.2.5.2-alpha.
18580 - Move the test-network.sh script to chutney, and modify tor's test-
18581 network.sh to call the (newer) chutney version when available.
18582 Resolves ticket 19116. Patch by teor.
18583 - Use the lcov convention for marking lines as unreachable, so that
18584 we don't count them when we're generating test coverage data.
18585 Update our coverage tools to understand this convention. Closes
18588 o Minor bugfixes (bootstrap):
18589 - Remember the directory we fetched the consensus or previous
18590 certificates from, and use it to fetch future authority
18591 certificates. This change improves bootstrapping performance.
18592 Fixes bug 18963; bugfix on 0.2.8.1-alpha.
18594 o Minor bugfixes (build):
18595 - The test-stem and test-network makefile targets now depend only on
18596 the tor binary that they are testing. Previously, they depended on
18597 "make all". Fixes bug 18240; bugfix on 0.2.8.2-alpha. Based on a
18598 patch from "cypherpunks".
18600 o Minor bugfixes (circuits):
18601 - Make sure extend_info_from_router() is only called on servers.
18602 Fixes bug 19639; bugfix on 0.2.8.1-alpha.
18604 o Minor bugfixes (compilation):
18605 - When building with Clang, use a full set of GCC warnings.
18606 (Previously, we included only a subset, because of the way we
18607 detected them.) Fixes bug 19216; bugfix on 0.2.0.1-alpha.
18609 o Minor bugfixes (directory authority):
18610 - Authorities now sort the "package" lines in their votes, for ease
18611 of debugging. (They are already sorted in consensus documents.)
18612 Fixes bug 18840; bugfix on 0.2.6.3-alpha.
18613 - When parsing a detached signature, make sure we use the length of
18614 the digest algorithm instead of an hardcoded DIGEST256_LEN in
18615 order to avoid comparing bytes out-of-bounds with a smaller digest
18616 length such as SHA1. Fixes bug 19066; bugfix on 0.2.2.6-alpha.
18618 o Minor bugfixes (documentation):
18619 - Document the --passphrase-fd option in the tor manpage. Fixes bug
18620 19504; bugfix on 0.2.7.3-rc.
18621 - Fix the description of the --passphrase-fd option in the
18622 tor-gencert manpage. The option is used to pass the number of a
18623 file descriptor to read the passphrase from, not to read the file
18624 descriptor from. Fixes bug 19505; bugfix on 0.2.0.20-alpha.
18626 o Minor bugfixes (ephemeral hidden service):
18627 - When deleting an ephemeral hidden service, close its intro points
18628 even if they are not completely open. Fixes bug 18604; bugfix
18631 o Minor bugfixes (guard selection):
18632 - Use a single entry guard even if the NumEntryGuards consensus
18633 parameter is not provided. Fixes bug 17688; bugfix
18635 - Don't mark guards as unreachable if connection_connect() fails.
18636 That function fails for local reasons, so it shouldn't reveal
18637 anything about the status of the guard. Fixes bug 14334; bugfix
18640 o Minor bugfixes (hidden service client):
18641 - Increase the minimum number of internal circuits we preemptively
18642 build from 2 to 3, so a circuit is available when a client
18643 connects to another onion service. Fixes bug 13239; bugfix
18646 o Minor bugfixes (logging):
18647 - When logging a directory ownership mismatch, log the owning
18648 username correctly. Fixes bug 19578; bugfix on 0.2.2.29-beta.
18650 o Minor bugfixes (memory leaks):
18651 - Fix a small, uncommon memory leak that could occur when reading a
18652 truncated ed25519 key file. Fixes bug 18956; bugfix
18655 o Minor bugfixes (testing):
18656 - Allow clients to retry HSDirs much faster in test networks. Fixes
18657 bug 19702; bugfix on 0.2.7.1-alpha. Patch by teor.
18658 - Disable ASAN's detection of segmentation faults while running
18659 test_bt.sh, so that we can make sure that our own backtrace
18660 generation code works. Fixes another aspect of bug 18934; bugfix
18661 on 0.2.5.2-alpha. Patch from "cypherpunks".
18662 - Fix the test-network-all target on out-of-tree builds by using the
18663 correct path to the test driver script. Fixes bug 19421; bugfix
18666 o Minor bugfixes (time):
18667 - Improve overflow checks in tv_udiff and tv_mdiff. Fixes bug 19483;
18668 bugfix on all released tor versions.
18669 - When computing the difference between two times in milliseconds,
18670 we now round to the nearest millisecond correctly. Previously, we
18671 could sometimes round in the wrong direction. Fixes bug 19428;
18672 bugfix on 0.2.2.2-alpha.
18674 o Minor bugfixes (user interface):
18675 - Display a more accurate number of suppressed messages in the log
18676 rate-limiter. Previously, there was a potential integer overflow
18677 in the counter. Now, if the number of messages hits a maximum, the
18678 rate-limiter doesn't count any further. Fixes bug 19435; bugfix
18680 - Fix a typo in the passphrase prompt for the ed25519 identity key.
18681 Fixes bug 19503; bugfix on 0.2.7.2-alpha.
18683 o Code simplification and refactoring:
18684 - Remove redundant declarations of the MIN macro. Closes
18686 - Rename tor_dup_addr() to tor_addr_to_str_dup() to avoid confusion.
18687 Closes ticket 18462; patch from "icanhasaccount".
18688 - Split the 600-line directory_handle_command_get function into
18689 separate functions for different URL types. Closes ticket 16698.
18692 - Fix spelling of "--enable-tor2web-mode" in the manpage. Closes
18693 ticket 19153. Patch from "U+039b".
18695 o Removed features:
18696 - Remove support for "GET /tor/bytes.txt" DirPort request, and
18697 "GETINFO dir-usage" controller request, which were only available
18698 via a compile-time option in Tor anyway. Feature was added in
18699 0.2.2.1-alpha. Resolves ticket 19035.
18700 - There is no longer a compile-time option to disable support for
18701 TransPort. (If you don't want TransPort; just don't use it.) Patch
18702 from "U+039b". Closes ticket 19449.
18705 - Run more workqueue tests as part of "make check". These had
18706 previously been implemented, but you needed to know special
18707 command-line options to enable them.
18708 - We now have unit tests for our code to reject zlib "compression
18709 bombs". (Fortunately, the code works fine.)
18712 Changes in version 0.2.8.6 - 2016-08-02
18714 Tor 0.2.8.6 is the first stable version of the Tor 0.2.8 series.
18716 The Tor 0.2.8 series improves client bootstrapping performance,
18717 completes the authority-side implementation of improved identity
18718 keys for relays, and includes numerous bugfixes and performance
18719 improvements throughout the program. This release continues to
18720 improve the coverage of Tor's test suite. For a full list of
18721 changes since Tor 0.2.7, see the ReleaseNotes file.
18723 Changes since 0.2.8.5-rc:
18725 o Minor features (geoip):
18726 - Update geoip and geoip6 to the July 6 2016 Maxmind GeoLite2
18729 o Minor bugfixes (compilation):
18730 - Fix a compilation warning in the unit tests on systems where char
18731 is signed. Fixes bug 19682; bugfix on 0.2.8.1-alpha.
18733 o Minor bugfixes (fallback directories):
18734 - Remove 1 fallback that was on the hardcoded list, then opted-out,
18735 leaving 89 of the 100 fallbacks originally introduced in Tor
18736 0.2.8.2-alpha in March 2016. Closes ticket 19782; patch by teor.
18738 o Minor bugfixes (Linux seccomp2 sandbox):
18739 - Allow more syscalls when running with "Sandbox 1" enabled:
18740 sysinfo, getsockopt(SO_SNDBUF), and setsockopt(SO_SNDBUFFORCE). On
18741 some systems, these are required for Tor to start. Fixes bug
18742 18397; bugfix on 0.2.5.1-alpha. Patch from Daniel Pinto.
18743 - Allow IPPROTO_UDP datagram sockets when running with "Sandbox 1",
18744 so that get_interface_address6_via_udp_socket_hack() can work.
18745 Fixes bug 19660; bugfix on 0.2.5.1-alpha.
18748 Changes in version 0.2.8.5-rc - 2016-07-07
18749 Tor 0.2.8.5-rc is the second release candidate in the Tor 0.2.8
18750 series. If we find no new bugs or regressions here, the first stable
18751 0.2.8 release will be identical to it. It has a few small bugfixes
18752 against previous versions.
18754 o Directory authority changes:
18755 - Urras is no longer a directory authority. Closes ticket 19271.
18757 o Major bugfixes (heartbeat):
18758 - Fix a regression that would crash Tor when the periodic
18759 "heartbeat" log messages were disabled. Fixes bug 19454; bugfix on
18760 0.2.8.1-alpha. Reported by "kubaku".
18762 o Minor features (build):
18763 - Tor now again builds with the recent OpenSSL 1.1 development
18764 branch (tested against 1.1.0-pre6-dev). Closes ticket 19499.
18765 - When building manual pages, set the timezone to "UTC", so that the
18766 output is reproducible. Fixes bug 19558; bugfix on 0.2.2.9-alpha.
18767 Patch from intrigeri.
18769 o Minor bugfixes (fallback directory selection):
18770 - Avoid errors during fallback selection if there are no eligible
18771 fallbacks. Fixes bug 19480; bugfix on 0.2.8.3-alpha. Patch
18774 o Minor bugfixes (IPv6, microdescriptors):
18775 - Don't check node addresses when we only have a routerstatus. This
18776 allows IPv6-only clients to bootstrap by fetching microdescriptors
18777 from fallback directory mirrors. (The microdescriptor consensus
18778 has no IPv6 addresses in it.) Fixes bug 19608; bugfix
18781 o Minor bugfixes (logging):
18782 - Reduce pointlessly verbose log messages when directory servers
18783 can't be found. Fixes bug 18849; bugfix on 0.2.8.3-alpha and
18784 0.2.8.1-alpha. Patch by teor.
18785 - When a fallback directory changes its fingerprint from the hard-
18786 coded fingerprint, log a less severe, more explanatory log
18787 message. Fixes bug 18812; bugfix on 0.2.8.1-alpha. Patch by teor.
18789 o Minor bugfixes (Linux seccomp2 sandboxing):
18790 - Allow statistics to be written to disk when "Sandbox 1" is
18791 enabled. Fixes bugs 19556 and 19957; bugfix on 0.2.5.1-alpha and
18792 0.2.6.1-alpha respectively.
18794 o Minor bugfixes (user interface):
18795 - Remove a warning message "Service [scrubbed] not found after
18796 descriptor upload". This message appears when one uses HSPOST
18797 control command to upload a service descriptor. Since there is
18798 only a descriptor and no service, showing this message is
18799 pointless and confusing. Fixes bug 19464; bugfix on 0.2.7.2-alpha.
18801 o Fallback directory list:
18802 - Add a comment to the generated fallback directory list that
18803 explains how to comment out unsuitable fallbacks in a way that's
18804 compatible with the stem fallback parser.
18805 - Update fallback whitelist and blacklist based on relay operator
18806 emails. Blacklist unsuitable (non-working, over-volatile)
18807 fallbacks. Resolves ticket 19071. Patch by teor.
18808 - Remove 10 unsuitable fallbacks, leaving 90 of the 100 fallbacks
18809 originally introduced in Tor 0.2.8.2-alpha in March 2016. Closes
18810 ticket 19071; patch by teor.
18813 Changes in version 0.2.8.4-rc - 2016-06-15
18814 Tor 0.2.8.4-rc is the first release candidate in the Tor 0.2.8 series.
18815 If we find no new bugs or regressions here, the first stable 0.2.8
18816 release will be identical to it. It has a few small bugfixes against
18819 o Major bugfixes (user interface):
18820 - Correctly give a warning in the cases where a relay is specified
18821 by nickname, and one such relay is found, but it is not officially
18822 Named. Fixes bug 19203; bugfix on 0.2.3.1-alpha.
18824 o Minor features (build):
18825 - Tor now builds once again with the recent OpenSSL 1.1 development
18826 branch (tested against 1.1.0-pre5 and 1.1.0-pre6-dev).
18828 o Minor features (geoip):
18829 - Update geoip and geoip6 to the June 7 2016 Maxmind GeoLite2
18832 o Minor bugfixes (compilation):
18833 - Cause the unit tests to compile correctly on mingw64 versions that
18834 lack sscanf. Fixes bug 19213; bugfix on 0.2.7.1-alpha.
18836 o Minor bugfixes (downloading):
18837 - Predict more correctly whether we'll be downloading over HTTP when
18838 we determine the maximum length of a URL. This should avoid a
18839 "BUG" warning about the Squid HTTP proxy and its URL limits. Fixes
18843 Changes in version 0.2.8.3-alpha - 2016-05-26
18844 Tor 0.2.8.3-alpha resolves several bugs, most of them introduced over
18845 the course of the 0.2.8 development cycle. It improves the behavior of
18846 directory clients, fixes several crash bugs, fixes a gap in compiler
18847 hardening, and allows the full integration test suite to run on
18850 o Major bugfixes (security, client, DNS proxy):
18851 - Stop a crash that could occur when a client running with DNSPort
18852 received a query with multiple address types, and the first
18853 address type was not supported. Found and fixed by Scott Dial.
18854 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
18856 o Major bugfixes (security, compilation):
18857 - Correctly detect compiler flags on systems where _FORTIFY_SOURCE
18858 is predefined. Previously, our use of -D_FORTIFY_SOURCE would
18859 cause a compiler warning, thereby making other checks fail, and
18860 needlessly disabling compiler-hardening support. Fixes one case of
18861 bug 18841; bugfix on 0.2.3.17-beta. Patch from "trudokal".
18863 o Major bugfixes (security, directory authorities):
18864 - Fix a crash and out-of-bounds write during authority voting, when
18865 the list of relays includes duplicate ed25519 identity keys. Fixes
18866 bug 19032; bugfix on 0.2.8.2-alpha.
18868 o Major bugfixes (client, bootstrapping):
18869 - Check if bootstrap consensus downloads are still needed when the
18870 linked connection attaches. This prevents tor making unnecessary
18871 begindir-style connections, which are the only directory
18872 connections tor clients make since the fix for 18483 was merged.
18873 - Fix some edge cases where consensus download connections may not
18874 have been closed, even though they were not needed. Related to fix
18876 - Make relays retry consensus downloads the correct number of times,
18877 rather than the more aggressive client retry count. Fixes part of
18879 - Stop downloading consensuses when we have a consensus, even if we
18880 don't have all the certificates for it yet. Fixes bug 18809;
18881 bugfix on 0.2.8.1-alpha. Patches by arma and teor.
18883 o Major bugfixes (directory mirrors):
18884 - Decide whether to advertise begindir support in the the same way
18885 we decide whether to advertise our DirPort. Allowing these
18886 decisions to become out-of-sync led to surprising behavior like
18887 advertising begindir support when hibernation made us not
18888 advertise a DirPort. Resolves bug 18616; bugfix on 0.2.8.1-alpha.
18891 o Major bugfixes (IPv6 bridges, client):
18892 - Actually use IPv6 addresses when selecting directory addresses for
18893 IPv6 bridges. Fixes bug 18921; bugfix on 0.2.8.1-alpha. Patch
18896 o Major bugfixes (key management):
18897 - If OpenSSL fails to generate an RSA key, do not retain a dangling
18898 pointer to the previous (uninitialized) key value. The impact here
18899 should be limited to a difficult-to-trigger crash, if OpenSSL is
18900 running an engine that makes key generation failures possible, or
18901 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
18902 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
18905 o Major bugfixes (testing):
18906 - Fix a bug that would block 'make test-network-all' on systems where
18907 IPv6 packets were lost. Fixes bug 19008; bugfix on 0.2.7.3-rc.
18908 - Avoid "WSANOTINITIALISED" warnings in the unit tests. Fixes bug 18668;
18909 bugfix on 0.2.8.1-alpha.
18911 o Minor features (clients):
18912 - Make clients, onion services, and bridge relays always use an
18913 encrypted begindir connection for directory requests. Resolves
18914 ticket 18483. Patch by "teor".
18916 o Minor features (fallback directory mirrors):
18917 - Give each fallback the same weight for client selection; restrict
18918 fallbacks to one per operator; report fallback directory detail
18919 changes when rebuilding list; add new fallback directory mirrors
18920 to the whitelist; and many other minor simplifications and fixes.
18921 Closes tasks 17905, 18749, bug 18689, and fixes part of bug 18812 on
18922 0.2.8.1-alpha; patch by "teor".
18923 - Replace the 21 fallbacks generated in January 2016 and included in
18924 Tor 0.2.8.1-alpha, with a list of 100 fallbacks generated in March
18925 2016. Closes task 17158; patch by "teor".
18927 o Minor features (geoip):
18928 - Update geoip and geoip6 to the May 4 2016 Maxmind GeoLite2
18931 o Minor bugfixes (assert, portability):
18932 - Fix an assertion failure in memarea.c on systems where "long" is
18933 shorter than the size of a pointer. Fixes bug 18716; bugfix
18936 o Minor bugfixes (bootstrap):
18937 - Consistently use the consensus download schedule for authority
18938 certificates. Fixes bug 18816; bugfix on 0.2.4.13-alpha.
18940 o Minor bugfixes (build):
18941 - Remove a pair of redundant AM_CONDITIONAL declarations from
18942 configure.ac. Fixes one final case of bug 17744; bugfix
18944 - Resolve warnings when building on systems that are concerned with
18945 signed char. Fixes bug 18728; bugfix on 0.2.7.2-alpha
18947 - When libscrypt.h is found, but no libscrypt library can be linked,
18948 treat libscrypt as absent. Fixes bug 19161; bugfix
18951 o Minor bugfixes (client):
18952 - Turn all TestingClientBootstrap* into non-testing torrc options.
18953 This changes simply renames them by removing "Testing" in front of
18954 them and they do not require TestingTorNetwork to be enabled
18955 anymore. Fixes bug 18481; bugfix on 0.2.8.1-alpha.
18956 - Make directory node selection more reliable, mainly for IPv6-only
18957 clients and clients with few reachable addresses. Fixes bug 18929;
18958 bugfix on 0.2.8.1-alpha. Patch by "teor".
18960 o Minor bugfixes (controller, microdescriptors):
18961 - Make GETINFO dir/status-vote/current/consensus conform to the
18962 control specification by returning "551 Could not open cached
18963 consensus..." when not caching consensuses. Fixes bug 18920;
18964 bugfix on 0.2.2.6-alpha.
18966 o Minor bugfixes (crypto, portability):
18967 - The SHA3 and SHAKE routines now produce the correct output on Big
18968 Endian systems. No code calls either algorithm yet, so this is
18969 primarily a build fix. Fixes bug 18943; bugfix on 0.2.8.1-alpha.
18970 - Tor now builds again with the recent OpenSSL 1.1 development
18971 branch (tested against 1.1.0-pre4 and 1.1.0-pre5-dev). Closes
18974 o Minor bugfixes (directories):
18975 - When fetching extrainfo documents, compare their SHA256 digests
18976 and Ed25519 signing key certificates with the routerinfo that led
18977 us to fetch them, rather than with the most recent routerinfo.
18978 Otherwise we generate many spurious warnings about mismatches.
18979 Fixes bug 17150; bugfix on 0.2.7.2-alpha.
18981 o Minor bugfixes (logging):
18982 - When we can't generate a signing key because OfflineMasterKey is
18983 set, do not imply that we should have been able to load it. Fixes
18984 bug 18133; bugfix on 0.2.7.2-alpha.
18985 - Stop periodic_event_dispatch() from blasting twelve lines per
18986 second at loglevel debug. Fixes bug 18729; fix on 0.2.8.1-alpha.
18987 - When rejecting a misformed INTRODUCE2 cell, only log at
18988 PROTOCOL_WARN severity. Fixes bug 18761; bugfix on 0.2.8.2-alpha.
18990 o Minor bugfixes (pluggable transports):
18991 - Avoid reporting a spurious error when we decide that we don't need
18992 to terminate a pluggable transport because it has already exited.
18993 Fixes bug 18686; bugfix on 0.2.5.5-alpha.
18995 o Minor bugfixes (pointer arithmetic):
18996 - Fix a bug in memarea_alloc() that could have resulted in remote
18997 heap write access, if Tor had ever passed an unchecked size to
18998 memarea_alloc(). Fortunately, all the sizes we pass to
18999 memarea_alloc() are pre-checked to be less than 128 kilobytes.
19000 Fixes bug 19150; bugfix on 0.2.1.1-alpha. Bug found by
19003 o Minor bugfixes (relays):
19004 - Consider more config options when relays decide whether to
19005 regenerate their descriptor. Fixes more of bug 12538; bugfix
19007 - Resolve some edge cases where we might launch an ORPort
19008 reachability check even when DisableNetwork is set. Noticed while
19009 fixing bug 18616; bugfix on 0.2.3.9-alpha.
19011 o Minor bugfixes (statistics):
19012 - We now include consensus downloads via IPv6 in our directory-
19013 request statistics. Fixes bug 18460; bugfix on 0.2.3.14-alpha.
19015 o Minor bugfixes (testing):
19016 - Allow directories in small networks to bootstrap by skipping
19017 DirPort checks when the consensus has no exits. Fixes bug 19003;
19018 bugfix on 0.2.8.1-alpha. Patch by teor.
19019 - Fix a small memory leak that would occur when the
19020 TestingEnableCellStatsEvent option was turned on. Fixes bug 18673;
19021 bugfix on 0.2.5.2-alpha.
19023 o Minor bugfixes (time handling):
19024 - When correcting a corrupt 'struct tm' value, fill in the tm_wday
19025 field. Otherwise, our unit tests crash on Windows. Fixes bug
19026 18977; bugfix on 0.2.2.25-alpha.
19029 - Document the contents of the 'datadir/keys' subdirectory in the
19030 manual page. Closes ticket 17621.
19031 - Stop recommending use of nicknames to identify relays in our
19032 MapAddress documentation. Closes ticket 18312.
19035 Changes in version 0.2.8.2-alpha - 2016-03-28
19036 Tor 0.2.8.2-alpha is the second alpha in its series. It fixes numerous
19037 bugs in earlier versions of Tor, including some that prevented
19038 authorities using Tor 0.2.7.x from running correctly. IPv6 and
19039 directory support should also be much improved.
19041 o New system requirements:
19042 - Tor no longer supports versions of OpenSSL with a broken
19043 implementation of counter mode. (This bug was present in OpenSSL
19044 1.0.0, and was fixed in OpenSSL 1.0.0a.) Tor still detects, but no
19045 longer runs with, these versions.
19046 - Tor no longer attempts to support platforms where the "time_t"
19047 type is unsigned. (To the best of our knowledge, only OpenVMS does
19048 this, and Tor has never actually built on OpenVMS.) Closes
19050 - Tor now uses Autoconf version 2.63 or later, and Automake 1.11 or
19051 later (released in 2008 and 2009 respectively). If you are
19052 building Tor from the git repository instead of from the source
19053 distribution, and your tools are older than this, you will need to
19054 upgrade. Closes ticket 17732.
19056 o Major bugfixes (security, pointers):
19057 - Avoid a difficult-to-trigger heap corruption attack when extending
19058 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
19059 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
19060 Reported by Guido Vranken.
19062 o Major bugfixes (bridges, pluggable transports):
19063 - Modify the check for OR connections to private addresses. Allow
19064 bridges on private addresses, including pluggable transports that
19065 ignore the (potentially private) address in the bridge line. Fixes
19066 bug 18517; bugfix on 0.2.8.1-alpha. Reported by gk, patch by teor.
19068 o Major bugfixes (compilation):
19069 - Repair hardened builds under the clang compiler. Previously, our
19070 use of _FORTIFY_SOURCE would conflict with clang's address
19071 sanitizer. Fixes bug 14821; bugfix on 0.2.5.4-alpha.
19073 o Major bugfixes (crash on shutdown):
19074 - Correctly handle detaching circuits from muxes when shutting down.
19075 Fixes bug 18116; bugfix on 0.2.8.1-alpha.
19076 - Fix an assert-on-exit bug related to counting memory usage in
19077 rephist.c. Fixes bug 18651; bugfix on 0.2.8.1-alpha.
19079 o Major bugfixes (crash on startup):
19080 - Fix a segfault during startup: If a Unix domain socket was
19081 configured as listener (such as a ControlSocket or a SocksPort
19082 "unix:" socket), and tor was started as root but not configured to
19083 switch to another user, tor would segfault while trying to string
19084 compare a NULL value. Fixes bug 18261; bugfix on 0.2.8.1-alpha.
19087 o Major bugfixes (dns proxy mode, crash):
19088 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
19089 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
19091 o Major bugfixes (relays, bridge clients):
19092 - Ensure relays always allow IPv4 OR and Dir connections. Ensure
19093 bridge clients use the address configured in the bridge line.
19094 Fixes bug 18348; bugfix on 0.2.8.1-alpha. Reported by sysrqb,
19097 o Major bugfixes (voting):
19098 - Actually enable support for authorities to match routers by their
19099 Ed25519 identities. Previously, the code had been written, but
19100 some debugging code that had accidentally been left in the
19101 codebase made it stay turned off. Fixes bug 17702; bugfix
19103 - When collating votes by Ed25519 identities, authorities now
19104 include a "NoEdConsensus" flag if the ed25519 value (or lack
19105 thereof) for a server does not reflect the majority consensus.
19106 Related to bug 17668; bugfix on 0.2.7.2-alpha.
19107 - When generating a vote with keypinning disabled, never include two
19108 entries for the same ed25519 identity. This bug was causing
19109 authorities to generate votes that they could not parse when a
19110 router violated key pinning by changing its RSA identity but
19111 keeping its Ed25519 identity. Fixes bug 17668; fixes part of bug
19112 18318. Bugfix on 0.2.7.2-alpha.
19114 o Minor features (security, win32):
19115 - Set SO_EXCLUSIVEADDRUSE on Win32 to avoid a local port-stealing
19116 attack. Fixes bug 18123; bugfix on all tor versions. Patch
19119 o Minor features (bug-resistance):
19120 - Make Tor survive errors involving connections without a
19121 corresponding event object. Previously we'd fail with an
19122 assertion; now we produce a log message. Related to bug 16248.
19124 o Minor features (build):
19125 - Detect systems with FreeBSD-derived kernels (such as GNU/kFreeBSD)
19126 as having possible IPFW support. Closes ticket 18448. Patch from
19127 Steven Chamberlain.
19129 o Minor features (code hardening):
19130 - Use tor_snprintf() and tor_vsnprintf() even in external and low-
19131 level code, to harden against accidental failures to NUL-
19132 terminate. Part of ticket 17852. Patch from jsturgix. Found
19135 o Minor features (crypto):
19136 - Validate the hard-coded Diffie-Hellman parameters and ensure that
19137 p is a safe prime, and g is a suitable generator. Closes
19140 o Minor features (geoip):
19141 - Update geoip and geoip6 to the March 3 2016 Maxmind GeoLite2
19144 o Minor features (hidden service directory):
19145 - Streamline relay-side hsdir handling: when relays consider whether
19146 to accept an uploaded hidden service descriptor, they no longer
19147 check whether they are one of the relays in the network that is
19148 "supposed" to handle that descriptor. Implements ticket 18332.
19150 o Minor features (IPv6):
19151 - Add ClientPreferIPv6DirPort, which is set to 0 by default. If set
19152 to 1, tor prefers IPv6 directory addresses.
19153 - Add ClientUseIPv4, which is set to 1 by default. If set to 0, tor
19154 avoids using IPv4 for client OR and directory connections.
19155 - Try harder to obey the IP version restrictions "ClientUseIPv4 0",
19156 "ClientUseIPv6 0", "ClientPreferIPv6ORPort", and
19157 "ClientPreferIPv6DirPort". Closes ticket 17840; patch by teor.
19159 o Minor features (linux seccomp2 sandbox):
19160 - Reject attempts to change our Address with "Sandbox 1" enabled.
19161 Changing Address with Sandbox turned on would never actually work,
19162 but previously it would fail in strange and confusing ways. Found
19163 while fixing 18548.
19165 o Minor features (robustness):
19166 - Exit immediately with an error message if the code attempts to use
19167 Libevent without having initialized it. This should resolve some
19168 frequently-made mistakes in our unit tests. Closes ticket 18241.
19170 o Minor features (unix domain sockets):
19171 - Add a new per-socket option, RelaxDirModeCheck, to allow creating
19172 Unix domain sockets without checking the permissions on the parent
19173 directory. (Tor checks permissions by default because some
19174 operating systems only check permissions on the parent directory.
19175 However, some operating systems do look at permissions on the
19176 socket, and tor's default check is unneeded.) Closes ticket 18458.
19179 o Minor bugfixes (exit policies, security):
19180 - Refresh an exit relay's exit policy when interface addresses
19181 change. Previously, tor only refreshed the exit policy when the
19182 configured external address changed. Fixes bug 18208; bugfix on
19183 0.2.7.3-rc. Patch by teor.
19185 o Minor bugfixes (security, hidden services):
19186 - Prevent hidden services connecting to client-supplied rendezvous
19187 addresses that are reserved as internal or multicast. Fixes bug
19188 8976; bugfix on 0.2.3.21-rc. Patch by dgoulet and teor.
19190 o Minor bugfixes (build):
19191 - Do not link the unit tests against both the testing and non-
19192 testing versions of the static libraries. Fixes bug 18490; bugfix
19194 - Avoid spurious failures from configure files related to calling
19195 exit(0) in TOR_SEARCH_LIBRARY. Fixes bug 18626; bugfix on
19196 0.2.0.1-alpha. Patch from "cypherpunks".
19197 - Silence spurious clang-scan warnings in the ed25519_donna code by
19198 explicitly initializing some objects. Fixes bug 18384; bugfix on
19199 0.2.7.2-alpha. Patch by teor.
19201 o Minor bugfixes (client, bootstrap):
19202 - Count receipt of new microdescriptors as progress towards
19203 bootstrapping. Previously, with EntryNodes set, Tor might not
19204 successfully repopulate the guard set on bootstrapping. Fixes bug
19205 16825; bugfix on 0.2.3.1-alpha.
19207 o Minor bugfixes (code correctness):
19208 - Update to the latest version of Trunnel, which tries harder to
19209 avoid generating code that can invoke memcpy(p,NULL,0). Bug found
19210 by clang address sanitizer. Fixes bug 18373; bugfix
19213 o Minor bugfixes (configuration):
19214 - Fix a tiny memory leak when parsing a port configuration ending in
19215 ":auto". Fixes bug 18374; bugfix on 0.2.3.3-alpha.
19217 o Minor bugfixes (containers):
19218 - If we somehow attempt to construct a heap with more than
19219 1073741822 elements, avoid an integer overflow when maintaining
19220 the heap property. Fixes bug 18296; bugfix on 0.1.2.1-alpha.
19222 o Minor bugfixes (correctness):
19223 - Fix a bad memory handling bug that would occur if we had queued a
19224 cell on a channel's incoming queue. Fortunately, we can't actually
19225 queue a cell like that as our code is constructed today, but it's
19226 best to avoid this kind of error, even if there isn't any code
19227 that triggers it today. Fixes bug 18570; bugfix on 0.2.4.4-alpha.
19229 o Minor bugfixes (directory):
19230 - When generating a URL for a directory server on an IPv6 address,
19231 wrap the IPv6 address in square brackets. Fixes bug 18051; bugfix
19232 on 0.2.3.9-alpha. Patch from Malek.
19234 o Minor bugfixes (fallback directory mirrors):
19235 - When requesting extrainfo descriptors from a trusted directory
19236 server, check whether it is an authority or a fallback directory
19237 which supports extrainfo descriptors. Fixes bug 18489; bugfix on
19238 0.2.4.7-alpha. Reported by atagar, patch by teor.
19240 o Minor bugfixes (hidden service, client):
19241 - Handle the case where the user makes several fast consecutive
19242 requests to the same .onion address. Previously, the first six
19243 requests would each trigger a descriptor fetch, each picking a
19244 directory (there are 6 overall) and the seventh one would fail
19245 because no directories were left, thereby triggering a close on
19246 all current directory connections asking for the hidden service.
19247 The solution here is to not close the connections if we have
19248 pending directory fetches. Fixes bug 15937; bugfix
19251 o Minor bugfixes (hidden service, control port):
19252 - Add the onion address to the HS_DESC event for the UPLOADED action
19253 both on success or failure. It was previously hardcoded with
19254 UNKNOWN. Fixes bug 16023; bugfix on 0.2.7.2-alpha.
19256 o Minor bugfixes (hidden service, directory):
19257 - Bridges now refuse "rendezvous2" (hidden service descriptor)
19258 publish attempts. Suggested by ticket 18332.
19260 o Minor bugfixes (linux seccomp2 sandbox):
19261 - Allow the setrlimit syscall, and the prlimit and prlimit64
19262 syscalls, which some libc implementations use under the hood.
19263 Fixes bug 15221; bugfix on 0.2.5.1-alpha.
19264 - Avoid a 10-second delay when starting as a client with "Sandbox 1"
19265 enabled and no DNS resolvers configured. This should help TAILS
19266 start up faster. Fixes bug 18548; bugfix on 0.2.5.1-alpha.
19267 - Fix the sandbox's interoperability with unix domain sockets under
19268 setuid. Fixes bug 18253; bugfix on 0.2.8.1-alpha.
19270 o Minor bugfixes (logging):
19271 - When logging information about an unparsable networkstatus vote or
19272 consensus, do not say "vote" when we mean consensus. Fixes bug
19273 18368; bugfix on 0.2.0.8-alpha.
19274 - Scrub service name in "unrecognized service ID" log messages.
19275 Fixes bug 18600; bugfix on 0.2.4.11-alpha.
19276 - Downgrade logs and backtraces about IP versions to info-level.
19277 Only log backtraces once each time tor runs. Assists in diagnosing
19278 bug 18351; bugfix on 0.2.8.1-alpha. Reported by sysrqb and
19279 Christian, patch by teor.
19281 o Minor bugfixes (memory safety):
19282 - Avoid freeing an uninitialized pointer when opening a socket fails
19283 in get_interface_addresses_ioctl(). Fixes bug 18454; bugfix on
19284 0.2.3.11-alpha. Reported by toralf and "cypherpunks", patch
19286 - Correctly duplicate addresses in get_interface_address6_list().
19287 Fixes bug 18454; bugfix on 0.2.8.1-alpha. Reported by toralf,
19288 patch by "cypherpunks".
19289 - Fix a memory leak in tor-gencert. Fixes part of bug 18672; bugfix
19291 - Fix a memory leak in "tor --list-fingerprint". Fixes part of bug
19292 18672; bugfix on 0.2.5.1-alpha.
19294 o Minor bugfixes (private directory):
19295 - Prevent a race condition when creating private directories. Fixes
19296 part of bug 17852; bugfix on 0.0.2pre13. Part of ticket 17852.
19297 Patch from jsturgix. Found with Flawfinder.
19299 o Minor bugfixes (test networks, IPv6):
19300 - Allow internal IPv6 addresses in descriptors in test networks.
19301 Fixes bug 17153; bugfix on 0.2.3.16-alpha. Patch by teor, reported
19304 o Minor bugfixes (testing):
19305 - We no longer disable assertions in the unit tests when coverage is
19306 enabled. Instead, we require you to say --disable-asserts-in-tests
19307 to the configure script if you need assertions disabled in the
19308 unit tests (for example, if you want to perform branch coverage).
19309 Fixes bug 18242; bugfix on 0.2.7.1-alpha.
19311 o Minor bugfixes (time parsing):
19312 - Avoid overflow in tor_timegm when parsing dates in and after 2038
19313 on platforms with 32-bit time_t. Fixes bug 18479; bugfix on
19314 0.0.2pre14. Patch by teor.
19316 o Minor bugfixes (tor-gencert):
19317 - Correctly handle the case where an authority operator enters a
19318 passphrase but sends an EOF before sending a newline. Fixes bug
19319 17443; bugfix on 0.2.0.20-rc. Found by junglefowl.
19321 o Code simplification and refactoring:
19322 - Quote all the string interpolations in configure.ac -- even those
19323 which we are pretty sure can't contain spaces. Closes ticket
19324 17744. Patch from zerosion.
19325 - Remove specialized code for non-inplace AES_CTR. 99% of our AES is
19326 inplace, so there's no need to have a separate implementation for
19327 the non-inplace code. Closes ticket 18258. Patch from Malek.
19328 - Simplify return types for some crypto functions that can't
19329 actually fail. Patch from Hassan Alsibyani. Closes ticket 18259.
19332 - Change build messages to refer to "Fedora" instead of "Fedora
19333 Core", and "dnf" instead of "yum". Closes tickets 18459 and 18426.
19334 Patches from "icanhasaccount" and "cypherpunks".
19336 o Removed features:
19337 - We no longer maintain an internal freelist in memarea.c.
19338 Allocators should be good enough to make this code unnecessary,
19339 and it's doubtful that it ever had any performance benefit.
19342 - Fix several warnings from clang's address sanitizer produced in
19344 - Treat backtrace test failures as expected on FreeBSD until we
19345 solve bug 17808. Closes ticket 18204.
19348 Changes in version 0.2.8.1-alpha - 2016-02-04
19349 Tor 0.2.8.1-alpha is the first alpha release in its series. It
19350 includes numerous small features and bugfixes against previous Tor
19351 versions, and numerous small infrastructure improvements. The most
19352 notable features are a set of improvements to the directory subsystem.
19354 o Major features (security, Linux):
19355 - When Tor starts as root on Linux and is told to switch user ID, it
19356 can now retain the capability to bind to low ports. By default,
19357 Tor will do this only when it's switching user ID and some low
19358 ports have been configured. You can change this behavior with the
19359 new option KeepBindCapabilities. Closes ticket 8195.
19361 o Major features (directory system):
19362 - When bootstrapping multiple consensus downloads at a time, use the
19363 first one that starts downloading, and close the rest. This
19364 reduces failures when authorities or fallback directories are slow
19365 or down. Together with the code for feature 15775, this feature
19366 should reduces failures due to fallback churn. Implements ticket
19367 4483. Patch by "teor". Implements IPv4 portions of proposal 210 by
19368 "mikeperry" and "teor".
19369 - Include a trial list of 21 default fallback directories, generated
19370 in January 2016, based on an opt-in survey of suitable relays.
19371 Doing this should make clients bootstrap more quickly and reliably,
19372 and reduce the load on the directory authorities. Closes ticket
19373 15775. Patch by "teor".
19374 Candidates identified using an OnionOO script by "weasel", "teor",
19375 "gsathya", and "karsten".
19376 - Previously only relays that explicitly opened a directory port
19377 (DirPort) accepted directory requests from clients. Now all
19378 relays, with and without a DirPort, accept and serve tunneled
19379 directory requests that they receive through their ORPort. You can
19380 disable this behavior using the new DirCache option. Closes
19383 o Major key updates:
19384 - Update the V3 identity key for the dannenberg directory authority:
19385 it was changed on 18 November 2015. Closes task 17906. Patch
19388 o Minor features (security, clock):
19389 - Warn when the system clock appears to move back in time (when the
19390 state file was last written in the future). Tor doesn't know that
19391 consensuses have expired if the clock is in the past. Patch by
19392 "teor". Implements ticket 17188.
19394 o Minor features (security, exit policies):
19395 - ExitPolicyRejectPrivate now rejects more private addresses by
19396 default. Specifically, it now rejects the relay's outbound bind
19397 addresses (if configured), and the relay's configured port
19398 addresses (such as ORPort and DirPort). Fixes bug 17027; bugfix on
19399 0.2.0.11-alpha. Patch by "teor".
19401 o Minor features (security, memory erasure):
19402 - Set the unused entries in a smartlist to NULL. This helped catch
19403 a (harmless) bug, and shouldn't affect performance too much.
19404 Implements ticket 17026.
19405 - Use SecureMemoryWipe() function to securely clean memory on
19406 Windows. Previously we'd use OpenSSL's OPENSSL_cleanse() function.
19407 Implements feature 17986.
19408 - Use explicit_bzero or memset_s when present. Previously, we'd use
19409 OpenSSL's OPENSSL_cleanse() function. Closes ticket 7419; patches
19410 from <logan@hackers.mu> and <selven@hackers.mu>.
19411 - Make memwipe() do nothing when passed a NULL pointer or buffer of
19412 zero size. Check size argument to memwipe() for underflow. Fixes
19413 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
19416 o Minor features (security, RNG):
19417 - Adjust Tor's use of OpenSSL's RNG APIs so that they absolutely,
19418 positively are not allowed to fail. Previously we depended on
19419 internal details of OpenSSL's behavior. Closes ticket 17686.
19420 - Never use the system entropy output directly for anything besides
19421 seeding the PRNG. When we want to generate important keys, instead
19422 of using system entropy directly, we now hash it with the PRNG
19423 stream. This may help resist certain attacks based on broken OS
19424 entropy implementations. Closes part of ticket 17694.
19425 - Use modern system calls (like getentropy() or getrandom()) to
19426 generate strong entropy on platforms that have them. Closes
19429 o Minor features (accounting):
19430 - Added two modes to the AccountingRule option: One for limiting
19431 only the number of bytes sent ("AccountingRule out"), and one for
19432 limiting only the number of bytes received ("AccountingRule in").
19433 Closes ticket 15989; patch from "unixninja92".
19435 o Minor features (build):
19436 - Since our build process now uses "make distcheck", we no longer
19437 force "make dist" to depend on "make check". Closes ticket 17893;
19438 patch from "cypherpunks."
19439 - Tor now builds successfully with the recent OpenSSL 1.1
19440 development branch, and with the latest LibreSSL. Closes tickets
19441 17549, 17921, and 17984.
19443 o Minor features (controller):
19444 - Adds the FallbackDir entries to 'GETINFO config/defaults'. Closes
19445 tickets 16774 and 17817. Patch by George Tankersley.
19446 - New 'GETINFO hs/service/desc/id/' command to retrieve a hidden
19447 service descriptor from a service's local hidden service
19448 descriptor cache. Closes ticket 14846.
19449 - Add 'GETINFO exit-policy/reject-private/[default,relay]', so
19450 controllers can examine the the reject rules added by
19451 ExitPolicyRejectPrivate. This makes it easier for stem to display
19454 o Minor features (crypto):
19455 - Add SHA512 support to crypto.c. Closes ticket 17663; patch from
19457 - Add SHA3 and SHAKE support to crypto.c. Closes ticket 17783.
19458 - When allocating a digest state object, allocate no more space than
19459 we actually need. Previously, we would allocate as much space as
19460 the state for the largest algorithm would need. This change saves
19461 up to 672 bytes per circuit. Closes ticket 17796.
19462 - Improve performance when hashing non-multiple of 8 sized buffers,
19463 based on Andrew Moon's public domain SipHash-2-4 implementation.
19464 Fixes bug 17544; bugfix on 0.2.5.3-alpha.
19466 o Minor features (directory downloads):
19467 - Wait for busy authorities and fallback directories to become non-
19468 busy when bootstrapping. (A similar change was made in 6c443e987d
19469 for directory caches chosen from the consensus.) Closes ticket
19470 17864; patch by "teor".
19471 - Add UseDefaultFallbackDirs, which enables any hard-coded fallback
19472 directory mirrors. The default is 1; set it to 0 to disable
19473 fallbacks. Implements ticket 17576. Patch by "teor".
19475 o Minor features (geoip):
19476 - Update geoip and geoip6 to the January 5 2016 Maxmind GeoLite2
19479 o Minor features (IPv6):
19480 - Add an argument 'ipv6=address:orport' to the DirAuthority and
19481 FallbackDir torrc options, to specify an IPv6 address for an
19482 authority or fallback directory. Add hard-coded ipv6 addresses for
19483 directory authorities that have them. Closes ticket 17327; patch
19484 from Nick Mathewson and "teor".
19485 - Add address policy assume_action support for IPv6 addresses.
19486 - Limit IPv6 mask bits to 128.
19487 - Warn when comparing against an AF_UNSPEC address in a policy, it's
19488 almost always a bug. Closes ticket 17863; patch by "teor".
19489 - Allow users to configure directory authorities and fallback
19490 directory servers with IPv6 addresses and ORPorts. Resolves
19492 - routerset_parse now accepts IPv6 literal addresses. Fixes bug
19493 17060; bugfix on 0.2.1.3-alpha. Patch by "teor".
19494 - Make tor_ersatz_socketpair work on IPv6-only systems. Fixes bug
19495 17638; bugfix on 0.0.2pre8. Patch by "teor".
19497 o Minor features (logging):
19498 - When logging to syslog, allow a tag to be added to the syslog
19499 identity (the string prepended to every log message). The tag can
19500 be configured with SyslogIdentityTag and defaults to none. Setting
19501 it to "foo" will cause logs to be tagged as "Tor-foo". Closes
19504 o Minor features (portability):
19505 - Use timingsafe_memcmp() where available. Closes ticket 17944;
19506 patch from <logan@hackers.mu>.
19508 o Minor features (relay, address discovery):
19509 - Add a family argument to get_interface_addresses_raw() and
19510 subfunctions to make network interface address interogation more
19511 efficient. Now Tor can specifically ask for IPv4, IPv6 or both
19512 types of interfaces from the operating system. Resolves
19514 - When get_interface_address6_list(.,AF_UNSPEC,.) is called and
19515 fails to enumerate interface addresses using the platform-specific
19516 API, have it rely on the UDP socket fallback technique to try and
19517 find out what IP addresses (both IPv4 and IPv6) our machine has.
19518 Resolves ticket 17951.
19520 o Minor features (replay cache):
19521 - The replay cache now uses SHA256 instead of SHA1. Implements
19522 feature 8961. Patch by "teor", issue reported by "rransom".
19524 o Minor features (unix file permissions):
19525 - Defer creation of Unix sockets until after setuid. This avoids
19526 needing CAP_CHOWN and CAP_FOWNER when using systemd's
19527 CapabilityBoundingSet, or chown and fowner when using SELinux.
19528 Implements part of ticket 17562. Patch from Jamie Nguyen.
19529 - If any directory created by Tor is marked as group readable, the
19530 filesystem group is allowed to be either the default GID or the
19531 root user. Allowing root to read the DataDirectory prevents the
19532 need for CAP_READ_SEARCH when using systemd's
19533 CapabilityBoundingSet, or dac_read_search when using SELinux.
19534 Implements part of ticket 17562. Patch from Jamie Nguyen.
19535 - Introduce a new DataDirectoryGroupReadable option. If it is set to
19536 1, the DataDirectory will be made readable by the default GID.
19537 Implements part of ticket 17562. Patch from Jamie Nguyen.
19539 o Minor bugfixes (accounting):
19540 - The max bandwidth when using 'AccountRule sum' is now correctly
19541 logged. Fixes bug 18024; bugfix on 0.2.6.1-alpha. Patch
19542 from "unixninja92".
19544 o Minor bugfixes (code correctness):
19545 - When closing an entry connection, generate a warning if we should
19546 have sent an end cell for it but we haven't. Fixes bug 17876;
19547 bugfix on 0.2.3.2-alpha.
19548 - Assert that allocated memory held by the reputation code is freed
19549 according to its internal counters. Fixes bug 17753; bugfix
19551 - Assert when the TLS contexts fail to initialize. Fixes bug 17683;
19554 o Minor bugfixes (compilation):
19555 - Mark all object files that include micro-revision.i as depending
19556 on it, so as to make parallel builds more reliable. Fixes bug
19557 17826; bugfix on 0.2.5.1-alpha.
19558 - Don't try to use the pthread_condattr_setclock() function unless
19559 it actually exists. Fixes compilation on NetBSD-6.x. Fixes bug
19560 17819; bugfix on 0.2.6.3-alpha.
19561 - Fix backtrace compilation on FreeBSD. Fixes bug 17827; bugfix
19563 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
19564 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
19565 - Fix search for libevent libraries on OpenBSD (and other systems
19566 that install libevent 1 and libevent 2 in parallel). Fixes bug
19567 16651; bugfix on 0.1.0.7-rc. Patch from "rubiate".
19568 - Isolate environment variables meant for tests from the rest of the
19569 build system. Fixes bug 17818; bugfix on 0.2.7.3-rc.
19570 - Replace usage of 'INLINE' with 'inline'. Fixes bug 17804; bugfix
19572 - Remove config.log only from make distclean, not from make clean.
19573 Fixes bug 17924; bugfix on 0.2.4.1-alpha.
19575 o Minor bugfixes (crypto):
19576 - Check the return value of HMAC() and assert on failure. Fixes bug
19577 17658; bugfix on 0.2.3.6-alpha. Patch by "teor".
19579 o Minor bugfixes (fallback directories):
19580 - Mark fallbacks as "too busy" when they return a 503 response,
19581 rather than just marking authorities. Fixes bug 17572; bugfix on
19582 0.2.4.7-alpha. Patch by "teor".
19584 o Minor bugfixes (IPv6):
19585 - Update the limits in max_dl_per_request for IPv6 address length.
19586 Fixes bug 17573; bugfix on 0.2.1.5-alpha.
19588 o Minor bugfixes (linux seccomp2 sandbox):
19589 - Fix a crash when using offline master ed25519 keys with the Linux
19590 seccomp2 sandbox enabled. Fixes bug 17675; bugfix on 0.2.7.3-rc.
19592 o Minor bugfixes (logging):
19593 - In log messages that include a function name, use __FUNCTION__
19594 instead of __PRETTY_FUNCTION__. In GCC, these are synonymous, but
19595 with clang __PRETTY_FUNCTION__ has extra information we don't
19596 need. Fixes bug 16563; bugfix on 0.0.2pre8. Fix by Tom van
19598 - Remove needless quotes from a log message about unparseable
19599 addresses. Fixes bug 17843; bugfix on 0.2.3.3-alpha.
19601 o Minor bugfixes (portability):
19602 - Remove an #endif from configure.ac so that we correctly detect the
19603 presence of in6_addr.s6_addr32. Fixes bug 17923; bugfix
19606 o Minor bugfixes (relays):
19607 - Check that both the ORPort and DirPort (if present) are reachable
19608 before publishing a relay descriptor. Otherwise, relays publish a
19609 descriptor with DirPort 0 when the DirPort reachability test takes
19610 longer than the ORPort reachability test. Fixes bug 18050; bugfix
19611 on 0.1.0.1-rc. Reported by "starlight", patch by "teor".
19613 o Minor bugfixes (relays, hidden services):
19614 - Refuse connection requests to private OR addresses unless
19615 ExtendAllowPrivateAddresses is set. Previously, tor would connect,
19616 then refuse to send any cells to a private address. Fixes bugs
19617 17674 and 8976; bugfix on 0.2.3.21-rc. Patch by "teor".
19619 o Minor bugfixes (safe logging):
19620 - When logging a malformed hostname received through socks4, scrub
19621 it if SafeLogging says we should. Fixes bug 17419; bugfix
19624 o Minor bugfixes (statistics code):
19625 - Consistently check for overflow in round_*_to_next_multiple_of
19626 functions, and add unit tests with additional and maximal values.
19627 Fixes part of bug 13192; bugfix on 0.2.2.1-alpha.
19628 - Handle edge cases in the laplace functions: avoid division by
19629 zero, avoid taking the log of zero, and silence clang type
19630 conversion warnings using round and trunc. Add unit tests for edge
19631 cases with maximal values. Fixes part of bug 13192; bugfix
19634 o Minor bugfixes (testing):
19635 - The test for log_heartbeat was incorrectly failing in timezones
19636 with non-integer offsets. Instead of comparing the end of the time
19637 string against a constant, compare it to the output of
19638 format_local_iso_time when given the correct input. Fixes bug
19639 18039; bugfix on 0.2.5.4-alpha.
19640 - Make unit tests pass on IPv6-only systems, and systems without
19641 localhost addresses (like some FreeBSD jails). Fixes bug 17632;
19642 bugfix on 0.2.7.3-rc. Patch by "teor".
19643 - Fix a memory leak in the ntor test. Fixes bug 17778; bugfix
19645 - Check the full results of SHA256 and SHA512 digests in the unit
19646 tests. Bugfix on 0.2.2.4-alpha. Patch by "teor".
19648 o Code simplification and refactoring:
19649 - Move logging of redundant policy entries in
19650 policies_parse_exit_policy_internal into its own function. Closes
19651 ticket 17608; patch from "juce".
19652 - Extract the more complicated parts of circuit_mark_for_close()
19653 into a new function that we run periodically before circuits are
19654 freed. This change removes more than half of the functions
19655 currently in the "blob". Closes ticket 17218.
19656 - Clean up a little duplicated code in
19657 crypto_expand_key_material_TAP(). Closes ticket 17587; patch
19659 - Decouple the list of streams waiting to be attached to circuits
19660 from the overall connection list. This change makes it possible to
19661 attach streams quickly while simplifying Tor's callgraph and
19662 avoiding O(N) scans of the entire connection list. Closes
19664 - When a direct directory request fails immediately on launch,
19665 instead of relaunching that request from inside the code that
19666 launches it, instead mark the connection for teardown. This change
19667 simplifies Tor's callback and prevents the directory-request
19668 launching code from invoking itself recursively. Closes
19670 - Remove code for configuring OpenSSL dynamic locks; OpenSSL doesn't
19671 use them. Closes ticket 17926.
19674 - Add a description of the correct use of the '--keygen' command-
19675 line option. Closes ticket 17583; based on text by 's7r'.
19676 - Document the minimum HeartbeatPeriod value. Closes ticket 15638.
19677 - Explain actual minima for BandwidthRate. Closes ticket 16382.
19678 - Fix a minor formatting typo in the manpage. Closes ticket 17791.
19679 - Mention torspec URL in the manpage and point the reader to it
19680 whenever we mention a document that belongs in torspce. Fixes
19683 o Removed features:
19684 - Remove client-side support for connecting to Tor relays running
19685 versions of Tor before 0.2.3.6-alpha. These relays didn't support
19686 the v3 TLS handshake protocol, and are no longer allowed on the
19687 Tor network. Implements the client side of ticket 11150. Based on
19688 patches by Tom van der Woerdt.
19691 - Add unit tests to check for common RNG failure modes, such as
19692 returning all zeroes, identical values, or incrementing values
19693 (OpenSSL's rand_predictable feature). Patch by "teor".
19694 - Log more information when the backtrace tests fail. Closes ticket
19695 17892. Patch from "cypherpunks."
19696 - Always test both ed25519 backends, so that we can be sure that our
19697 batch-open replacement code works. Part of ticket 16794.
19698 - Cover dns_resolve_impl() in dns.c with unit tests. Implements a
19699 portion of ticket 16831.
19700 - More unit tests for compat_libevent.c, procmon.c, tortls.c,
19701 util_format.c, directory.c, and options_validate.c. Closes tickets
19702 17075, 17082, 17084, 17003, and 17076 respectively. Patches from
19704 - Unit tests for directory_handle_command_get. Closes ticket 17004.
19705 Patch from Reinaldo de Souza Jr.
19708 Changes in version 0.2.7.6 - 2015-12-10
19709 Tor version 0.2.7.6 fixes a major bug in entry guard selection, as
19710 well as a minor bug in hidden service reliability.
19712 o Major bugfixes (guard selection):
19713 - Actually look at the Guard flag when selecting a new directory
19714 guard. When we implemented the directory guard design, we
19715 accidentally started treating all relays as if they have the Guard
19716 flag during guard selection, leading to weaker anonymity and worse
19717 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
19720 o Minor features (geoip):
19721 - Update geoip and geoip6 to the December 1 2015 Maxmind GeoLite2
19724 o Minor bugfixes (compilation):
19725 - When checking for net/pfvar.h, include netinet/in.h if possible.
19726 This fixes transparent proxy detection on OpenBSD. Fixes bug
19727 17551; bugfix on 0.1.2.1-alpha. Patch from "rubiate".
19728 - Fix a compilation warning with Clang 3.6: Do not check the
19729 presence of an address which can never be NULL. Fixes bug 17781.
19731 o Minor bugfixes (correctness):
19732 - When displaying an IPv6 exit policy, include the mask bits
19733 correctly even when the number is greater than 31. Fixes bug
19734 16056; bugfix on 0.2.4.7-alpha. Patch from "gturner".
19735 - The wrong list was used when looking up expired intro points in a
19736 rend service object, causing what we think could be reachability
19737 issues for hidden services, and triggering a BUG log. Fixes bug
19738 16702; bugfix on 0.2.7.2-alpha.
19739 - Fix undefined behavior in the tor_cert_checksig function. Fixes
19740 bug 17722; bugfix on 0.2.7.2-alpha.
19743 Changes in version 0.2.7.5 - 2015-11-20
19744 The Tor 0.2.7 release series is dedicated to the memory of Tor user
19745 and privacy advocate Caspar Bowden (1961-2015). Caspar worked
19746 tirelessly to advocate human rights regardless of national borders,
19747 and oppose the encroachments of mass surveillance. He opposed national
19748 exceptionalism, he brought clarity to legal and policy debates, he
19749 understood and predicted the impact of mass surveillance on the world,
19750 and he laid the groundwork for resisting it. While serving on the Tor
19751 Project's board of directors, he brought us his uncompromising focus
19752 on technical excellence in the service of humankind. Caspar was an
19753 inimitable force for good and a wonderful friend. He was kind,
19754 humorous, generous, gallant, and believed we should protect one
19755 another without exception. We honor him here for his ideals, his
19756 efforts, and his accomplishments. Please honor his memory with works
19757 that would make him proud.
19759 Tor 0.2.7.5 is the first stable release in the Tor 0.2.7 series.
19761 The 0.2.7 series adds a more secure identity key type for relays,
19762 improves cryptography performance, resolves several longstanding
19763 hidden-service performance issues, improves controller support for
19764 hidden services, and includes small bugfixes and performance
19765 improvements throughout the program. This release series also includes
19766 more tests than before, and significant simplifications to which parts
19767 of Tor invoke which others.
19769 (This release contains no code changes since 0.2.7.4-rc.)
19772 Changes in version 0.2.7.4-rc - 2015-10-21
19773 Tor 0.2.7.4-rc is the second release candidate in the 0.2.7 series. It
19774 fixes some important memory leaks, and a scary-looking (but mostly
19775 harmless in practice) invalid-read bug. It also has a few small
19776 bugfixes, notably fixes for compilation and portability on different
19777 platforms. If no further significant bounds are found, the next
19778 release will the the official stable release.
19780 o Major bugfixes (security, correctness):
19781 - Fix an error that could cause us to read 4 bytes before the
19782 beginning of an openssl string. This bug could be used to cause
19783 Tor to crash on systems with unusual malloc implementations, or
19784 systems with unusual hardening installed. Fixes bug 17404; bugfix
19787 o Major bugfixes (correctness):
19788 - Fix a use-after-free bug in validate_intro_point_failure(). Fixes
19789 bug 17401; bugfix on 0.2.7.3-rc.
19791 o Major bugfixes (memory leaks):
19792 - Fix a memory leak in ed25519 batch signature checking. Fixes bug
19793 17398; bugfix on 0.2.6.1-alpha.
19794 - Fix a memory leak in rend_cache_failure_entry_free(). Fixes bug
19795 17402; bugfix on 0.2.7.3-rc.
19796 - Fix a memory leak when reading an expired signing key from disk.
19797 Fixes bug 17403; bugfix on 0.2.7.2-rc.
19799 o Minor features (geoIP):
19800 - Update geoip and geoip6 to the October 9 2015 Maxmind GeoLite2
19803 o Minor bugfixes (compilation):
19804 - Repair compilation with the most recent (unreleased, alpha)
19805 vesions of OpenSSL 1.1. Fixes part of ticket 17237.
19806 - Fix an integer overflow warning in test_crypto_slow.c. Fixes bug
19807 17251; bugfix on 0.2.7.2-alpha.
19808 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
19809 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
19811 o Minor bugfixes (portability):
19812 - Use libexecinfo on FreeBSD to enable backtrace support. Fixes
19813 part of bug 17151; bugfix on 0.2.5.2-alpha. Patch from
19816 o Minor bugfixes (sandbox):
19817 - Add the "hidserv-stats" filename to our sandbox filter for the
19818 HiddenServiceStatistics option to work properly. Fixes bug 17354;
19819 bugfix on 0.2.6.2-alpha. Patch from David Goulet.
19821 o Minor bugfixes (testing):
19822 - Add unit tests for get_interface_address* failure cases. Fixes bug
19823 17173; bugfix on 0.2.7.3-rc. Patch by fk/teor.
19824 - Fix breakage when running 'make check' with BSD make. Fixes bug
19825 17154; bugfix on 0.2.7.3-rc. Patch by Marcin Cieślak.
19826 - Make the get_ifaddrs_* unit tests more tolerant of different
19827 network configurations. (Don't assume every test box has an IPv4
19828 address, and don't assume every test box has a non-localhost
19829 address.) Fixes bug 17255; bugfix on 0.2.7.3-rc. Patch by "teor".
19830 - Skip backtrace tests when backtrace support is not compiled in.
19831 Fixes part of bug 17151; bugfix on 0.2.7.1-alpha. Patch from
19835 - Fix capitalization of SOCKS in sample torrc. Closes ticket 15609.
19836 - Note that HiddenServicePorts can take a unix domain socket. Closes
19840 Changes in version 0.2.7.3-rc - 2015-09-25
19841 Tor 0.2.7.3-rc is the first release candidate in the 0.2.7 series. It
19842 contains numerous usability fixes for Ed25519 keys, safeguards against
19843 several misconfiguration problems, significant simplifications to
19844 Tor's callgraph, and numerous bugfixes and small features.
19846 This is the most tested release of Tor to date. The unit tests cover
19847 39.40% of the code, and the integration tests (accessible with "make
19848 test-full-online", requiring stem and chutney and a network
19849 connection) raise the coverage to 64.49%.
19851 o Major features (security, hidden services):
19852 - Hidden services, if using the EntryNodes option, are required to
19853 use more than one EntryNode, in order to avoid a guard discovery
19854 attack. (This would only affect people who had configured hidden
19855 services and manually specified the EntryNodes option with a
19856 single entry-node. The impact was that it would be easy to
19857 remotely identify the guard node used by such a hidden service.
19858 See ticket for more information.) Fixes ticket 14917.
19860 o Major features (Ed25519 keys, keypinning):
19861 - The key-pinning option on directory authorities is now advisory-
19862 only by default. In a future version, or when the AuthDirPinKeys
19863 option is set, pins are enforced again. Disabling key-pinning
19864 seemed like a good idea so that we can survive the fallout of any
19865 usability problems associated with Ed25519 keys. Closes
19868 o Major features (Ed25519 performance):
19869 - Improve the speed of Ed25519 operations and Curve25519 keypair
19870 generation when built targeting 32 bit x86 platforms with SSE2
19871 available. Implements ticket 16535.
19872 - Improve the runtime speed of Ed25519 signature verification by
19873 using Ed25519-donna's batch verification support. Implements
19876 o Major features (performance testing):
19877 - The test-network.sh script now supports performance testing.
19878 Requires corresponding chutney performance testing changes. Patch
19879 by "teor". Closes ticket 14175.
19881 o Major features (relay, Ed25519):
19882 - Significant usability improvements for Ed25519 key management. Log
19883 messages are better, and the code can recover from far more
19884 failure conditions. Thanks to "s7r" for reporting and diagnosing
19886 - Add a new OfflineMasterKey option to tell Tor never to try loading
19887 or generating a secret Ed25519 identity key. You can use this in
19888 combination with tor --keygen to manage offline and/or encrypted
19889 Ed25519 keys. Implements ticket 16944.
19890 - Add a --newpass option to allow changing or removing the
19891 passphrase of an encrypted key with tor --keygen. Implements part
19893 - On receiving a HUP signal, check to see whether the Ed25519
19894 signing key has changed, and reload it if so. Closes ticket 16790.
19896 o Major bugfixes (relay, Ed25519):
19897 - Avoid crashing on 'tor --keygen'. Fixes bug 16679; bugfix on
19898 0.2.7.2-alpha. Reported by "s7r".
19899 - Improve handling of expired signing keys with offline master keys.
19900 Fixes bug 16685; bugfix on 0.2.7.2-alpha. Reported by "s7r".
19902 o Minor features (client-side privacy):
19903 - New KeepAliveIsolateSOCKSAuth option to indefinitely extend circuit
19904 lifespan when IsolateSOCKSAuth and streams with SOCKS
19905 authentication are attached to the circuit. This allows
19906 applications like TorBrowser to manage circuit lifetime on their
19907 own. Implements feature 15482.
19908 - When logging malformed hostnames from SOCKS5 requests, respect
19909 SafeLogging configuration. Fixes bug 16891; bugfix on 0.1.1.16-rc.
19911 o Minor features (compilation):
19912 - Give a warning as early as possible when trying to build with an
19913 unsupported OpenSSL version. Closes ticket 16901.
19914 - Fail during configure if we're trying to build against an OpenSSL
19915 built without ECC support. Fixes bug 17109, bugfix on 0.2.7.1-alpha
19916 which started requiring ECC.
19918 o Minor features (geoip):
19919 - Update geoip and geoip6 to the September 3 2015 Maxmind GeoLite2
19922 o Minor features (hidden services):
19923 - Relays need to have the Fast flag to get the HSDir flag. As this
19924 is being written, we'll go from 2745 HSDirs down to 2342, a ~14%
19925 drop. This change should make some attacks against the hidden
19926 service directory system harder. Fixes ticket 15963.
19927 - Turn on hidden service statistics collection by setting the torrc
19928 option HiddenServiceStatistics to "1" by default. (This keeps
19929 track only of the fraction of traffic used by hidden services, and
19930 the total number of hidden services in existence.) Closes
19932 - Client now uses an introduction point failure cache to know when
19933 to fetch or keep a descriptor in their cache. Previously, failures
19934 were recorded implicitly, but not explicitly remembered. Closes
19937 o Minor features (testing, authorities, documentation):
19938 - New TestingDirAuthVote{Exit,Guard,HSDir}IsStrict flags to
19939 explicitly manage consensus flags in testing networks. Patch by
19940 "robgjansen", modified by "teor". Implements part of ticket 14882.
19942 o Minor bugfixes (security, exit policies):
19943 - ExitPolicyRejectPrivate now also rejects the relay's published
19944 IPv6 address (if any), and any publicly routable IPv4 or IPv6
19945 addresses on any local interfaces. ticket 17027. Patch by "teor".
19946 Fixes bug 17027; bugfix on 0.2.0.11-alpha.
19948 o Minor bug fixes (torrc exit policies):
19949 - In torrc, "accept6 *" and "reject6 *" ExitPolicy lines now only
19950 produce IPv6 wildcard addresses. Previously they would produce
19951 both IPv4 and IPv6 wildcard addresses. Patch by "teor". Fixes part
19952 of bug 16069; bugfix on 0.2.4.7-alpha.
19953 - When parsing torrc ExitPolicies, we now warn for a number of cases
19954 where the user's intent is likely to differ from Tor's actual
19955 behavior. These include: using an IPv4 address with an accept6 or
19956 reject6 line; using "private" on an accept6 or reject6 line; and
19957 including any ExitPolicy lines after accept *:* or reject *:*.
19958 Related to ticket 16069.
19959 - When parsing torrc ExitPolicies, we now issue an info-level
19960 message when expanding an "accept/reject *" line to include both
19961 IPv4 and IPv6 wildcard addresses. Related to ticket 16069.
19962 - In each instance above, usage advice is provided to avoid the
19963 message. Resolves ticket 16069. Patch by "teor". Fixes part of bug
19964 16069; bugfix on 0.2.4.7-alpha.
19966 o Minor bugfixes (authority):
19967 - Don't assign "HSDir" to a router if it isn't Valid and Running.
19968 Fixes bug 16524; bugfix on 0.2.7.2-alpha.
19969 - Downgrade log messages about Ed25519 key issues if they are in old
19970 cached router descriptors. Fixes part of bug 16286; bugfix
19972 - When we find an Ed25519 key issue in a cached descriptor, stop
19973 saying the descriptor was just "uploaded". Fixes another part of
19974 bug 16286; bugfix on 0.2.7.2-alpha.
19976 o Minor bugfixes (control port):
19977 - Repair a warning and a spurious result when getting the maximum
19978 number of file descriptors from the controller. Fixes bug 16697;
19979 bugfix on 0.2.7.2-alpha.
19981 o Minor bugfixes (correctness):
19982 - When calling channel_free_list(), avoid calling smartlist_remove()
19983 while inside a FOREACH loop. This partially reverts commit
19984 17356fe7fd96af where the correct SMARTLIST_DEL_CURRENT was
19985 incorrectly removed. Fixes bug 16924; bugfix on 0.2.4.4-alpha.
19987 o Minor bugfixes (documentation):
19988 - Advise users on how to configure separate IPv4 and IPv6 exit
19989 policies in the manpage and sample torrcs. Related to ticket 16069.
19990 - Fix the usage message of tor-resolve(1) so that it no longer lists
19991 the removed -F option. Fixes bug 16913; bugfix on 0.2.2.28-beta.
19992 - Fix an error in the manual page and comments for
19993 TestingDirAuthVoteHSDir[IsStrict], which suggested that a HSDir
19994 required "ORPort connectivity". While this is true, it is in no
19995 way unique to the HSDir flag. Of all the flags, only HSDirs need a
19996 DirPort configured in order for the authorities to assign that
19997 particular flag. Patch by "teor". Fixed as part of 14882; bugfix
20000 o Minor bugfixes (Ed25519):
20001 - Fix a memory leak when reading router descriptors with expired
20002 Ed25519 certificates. Fixes bug 16539; bugfix on 0.2.7.2-alpha.
20004 o Minor bugfixes (linux seccomp2 sandbox):
20005 - Allow bridge authorities to run correctly under the seccomp2
20006 sandbox. Fixes bug 16964; bugfix on 0.2.5.1-alpha.
20007 - Allow routers with ed25519 keys to run correctly under the
20008 seccomp2 sandbox. Fixes bug 16965; bugfix on 0.2.7.2-alpha.
20010 o Minor bugfixes (open file limit):
20011 - Fix set_max_file_descriptors() to set by default the max open file
20012 limit to the current limit when setrlimit() fails. Fixes bug
20013 16274; bugfix on 0.2.0.10-alpha. Patch by dgoulet.
20015 o Minor bugfixes (portability):
20016 - Try harder to normalize the exit status of the Tor process to the
20017 standard-provided range. Fixes bug 16975; bugfix on every version
20019 - Check correctly for Windows socket errors in the workqueue
20020 backend. Fixes bug 16741; bugfix on 0.2.6.3-alpha.
20021 - Fix the behavior of crypto_rand_time_range() when told to consider
20022 times before 1970. (These times were possible when running in a
20023 simulated network environment where time()'s output starts at
20024 zero.) Fixes bug 16980; bugfix on 0.2.7.1-alpha.
20025 - Restore correct operation of TLS client-cipher detection on
20026 OpenSSL 1.1. Fixes bug 14047; bugfix on 0.2.7.2-alpha.
20028 o Minor bugfixes (relay):
20029 - Ensure that worker threads actually exit when a fatal error or
20030 shutdown is indicated. This fix doesn't currently affect the
20031 behavior of Tor, because Tor workers never indicates fatal error
20032 or shutdown except in the unit tests. Fixes bug 16868; bugfix
20034 - Unblock threads before releasing the work queue mutex to ensure
20035 predictable scheduling behavior. Fixes bug 16644; bugfix
20038 o Code simplification and refactoring:
20039 - Change the function that's called when we need to retry all
20040 downloads so that it only reschedules the downloads to happen
20041 immediately, rather than launching them all at once itself. This
20042 further simplifies Tor's callgraph.
20043 - Move some format-parsing functions out of crypto.c and
20044 crypto_curve25519.c into crypto_format.c and/or util_format.c.
20045 - Move the client-only parts of init_keys() into a separate
20046 function. Closes ticket 16763.
20047 - Simplify the microdesc_free() implementation so that it no longer
20048 appears (to code analysis tools) to potentially invoke a huge
20049 suite of other microdesc functions.
20050 - Simply the control graph further by deferring the inner body of
20051 directory_all_unreachable() into a callback. Closes ticket 16762.
20052 - Treat the loss of an owning controller as equivalent to a SIGTERM
20053 signal. This removes a tiny amount of duplicated code, and
20054 simplifies our callgraph. Closes ticket 16788.
20055 - When generating an event to send to the controller, we no longer
20056 put the event over the network immediately. Instead, we queue
20057 these events, and use a Libevent callback to deliver them. This
20058 change simplifies Tor's callgraph by reducing the number of
20059 functions from which all other Tor functions are reachable. Closes
20061 - Wrap Windows-only C files inside '#ifdef _WIN32' so that tools
20062 that try to scan or compile every file on Unix won't decide that
20064 - Remove the unused "nulterminate" argument from buf_pullup().
20067 - Recommend a 40 GB example AccountingMax in torrc.sample rather
20068 than a 4 GB max. Closes ticket 16742.
20069 - Include the TUNING document in our source tarball. It is referred
20070 to in the ChangeLog and an error message. Fixes bug 16929; bugfix
20074 - The internal pure-C tor-fw-helper tool is now removed from the Tor
20075 distribution, in favor of the pure-Go clone available from
20076 https://gitweb.torproject.org/tor-fw-helper.git/ . The libraries
20077 used by the C tor-fw-helper are not, in our opinion, very
20078 confidence- inspiring in their secure-programming techniques.
20079 Closes ticket 13338.
20080 - Remove the code that would try to aggressively flush controller
20081 connections while writing to them. This code was introduced in
20082 0.1.2.7-alpha, in order to keep output buffers from exceeding
20083 their limits. But there is no longer a maximum output buffer size,
20084 and flushing data in this way caused some undesirable recursions
20085 in our call graph. Closes ticket 16480.
20088 - Make "bridges+hs" the default test network. This tests almost all
20089 tor functionality during make test-network, while allowing tests
20090 to succeed on non-IPv6 systems. Requires chutney commit 396da92 in
20091 test-network-bridges-hs. Closes tickets 16945 (tor) and 16946
20092 (chutney). Patches by "teor".
20093 - Autodetect CHUTNEY_PATH if the chutney and Tor sources are side-
20094 by-side in the same parent directory. Closes ticket 16903. Patch
20096 - Use environment variables rather than autoconf substitutions to
20097 send variables from the build system to the test scripts. This
20098 change should be easier to maintain, and cause 'make distcheck' to
20099 work better than before. Fixes bug 17148.
20100 - Add a new set of callgraph analysis scripts that use clang to
20101 produce a list of which Tor functions are reachable from which
20102 other Tor functions. We're planning to use these to help simplify
20103 our code structure by identifying illogical dependencies.
20104 - Add new 'test-full' and 'test-full-online' targets to run all
20105 tests, including integration tests with stem and chutney.
20106 - Make the test-workqueue test work on Windows by initializing the
20107 network before we begin.
20108 - New make target (make test-network-all) to run multiple applicable
20109 chutney test cases. Patch from Teor; closes 16953.
20110 - Unit test dns_resolve(), dns_clip_ttl() and dns_get_expiry_ttl()
20111 functions in dns.c. Implements a portion of ticket 16831.
20112 - When building Tor with testing coverage enabled, run Chutney tests
20113 (if any) using the 'tor-cov' coverage binary.
20114 - When running test-network or test-stem, check for the absence of
20115 stem/chutney before doing any build operations.
20118 Changes in version 0.2.7.2-alpha - 2015-07-27
20119 This, the second alpha in the Tor 0.2.7 series, has a number of new
20120 features, including a way to manually pick the number of introduction
20121 points for hidden services, and the much stronger Ed25519 signing key
20122 algorithm for regular Tor relays (including support for encrypted
20123 offline identity keys in the new algorithm).
20125 Support for Ed25519 on relays is currently limited to signing router
20126 descriptors; later alphas in this series will extend Ed25519 key
20127 support to more parts of the Tor protocol.
20129 o Major features (Ed25519 identity keys, Proposal 220):
20130 - All relays now maintain a stronger identity key, using the Ed25519
20131 elliptic curve signature format. This master key is designed so
20132 that it can be kept offline. Relays also generate an online
20133 signing key, and a set of other Ed25519 keys and certificates.
20134 These are all automatically regenerated and rotated as needed.
20135 Implements part of ticket 12498.
20136 - Directory authorities now vote on Ed25519 identity keys along with
20137 RSA1024 keys. Implements part of ticket 12498.
20138 - Directory authorities track which Ed25519 identity keys have been
20139 used with which RSA1024 identity keys, and do not allow them to
20140 vary freely. Implements part of ticket 12498.
20141 - Microdescriptors now include Ed25519 identity keys. Implements
20142 part of ticket 12498.
20143 - Add support for offline encrypted Ed25519 master keys. To use this
20144 feature on your tor relay, run "tor --keygen" to make a new master
20145 key (or to make a new signing key if you already have a master
20146 key). Closes ticket 13642.
20148 o Major features (Hidden services):
20149 - Add the torrc option HiddenServiceNumIntroductionPoints, to
20150 specify a fixed number of introduction points. Its maximum value
20151 is 10 and default is 3. Using this option can increase a hidden
20152 service's reliability under load, at the cost of making it more
20153 visible that the hidden service is facing extra load. Closes
20155 - Remove the adaptive algorithm for choosing the number of
20156 introduction points, which used to change the number of
20157 introduction points (poorly) depending on the number of
20158 connections the HS sees. Closes ticket 4862.
20160 o Major features (onion key cross-certification):
20161 - Relay descriptors now include signatures of their own identity
20162 keys, made using the TAP and ntor onion keys. These signatures
20163 allow relays to prove ownership of their own onion keys. Because
20164 of this change, microdescriptors will no longer need to include
20165 RSA identity keys. Implements proposal 228; closes ticket 12499.
20167 o Major features (performance):
20168 - Improve the runtime speed of Ed25519 operations by using the
20169 public-domain Ed25519-donna by Andrew M. ("floodyberry").
20170 Implements ticket 16467.
20171 - Improve the runtime speed of the ntor handshake by using an
20172 optimized curve25519 basepoint scalarmult implementation from the
20173 public-domain Ed25519-donna by Andrew M. ("floodyberry"), based on
20174 ideas by Adam Langley. Implements ticket 9663.
20176 o Major bugfixes (client-side privacy, also in 0.2.6.9):
20177 - Properly separate out each SOCKSPort when applying stream
20178 isolation. The error occurred because each port's session group
20179 was being overwritten by a default value when the listener
20180 connection was initialized. Fixes bug 16247; bugfix on
20181 0.2.6.3-alpha. Patch by "jojelino".
20183 o Major bugfixes (hidden service clients, stability, also in 0.2.6.10):
20184 - Stop refusing to store updated hidden service descriptors on a
20185 client. This reverts commit 9407040c59218 (which indeed fixed bug
20186 14219, but introduced a major hidden service reachability
20187 regression detailed in bug 16381). This is a temporary fix since
20188 we can live with the minor issue in bug 14219 (it just results in
20189 some load on the network) but the regression of 16381 is too much
20190 of a setback. First-round fix for bug 16381; bugfix
20193 o Major bugfixes (hidden services):
20194 - When cannibalizing a circuit for an introduction point, always
20195 extend to the chosen exit node (creating a 4 hop circuit).
20196 Previously Tor would use the current circuit exit node, which
20197 changed the original choice of introduction point, and could cause
20198 the hidden service to skip excluded introduction points or
20199 reconnect to a skipped introduction point. Fixes bug 16260; bugfix
20202 o Major bugfixes (open file limit):
20203 - The open file limit wasn't checked before calling
20204 tor_accept_socket_nonblocking(), which would make Tor exceed the
20205 limit. Now, before opening a new socket, Tor validates the open
20206 file limit just before, and if the max has been reached, return an
20207 error. Fixes bug 16288; bugfix on 0.1.1.1-alpha.
20209 o Major bugfixes (stability, also in 0.2.6.10):
20210 - Stop crashing with an assertion failure when parsing certain kinds
20211 of malformed or truncated microdescriptors. Fixes bug 16400;
20212 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
20213 by "cypherpunks_backup".
20214 - Stop random client-side assertion failures that could occur when
20215 connecting to a busy hidden service, or connecting to a hidden
20216 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
20219 o Minor features (directory authorities, security, also in 0.2.6.9):
20220 - The HSDir flag given by authorities now requires the Stable flag.
20221 For the current network, this results in going from 2887 to 2806
20222 HSDirs. Also, it makes it harder for an attacker to launch a sybil
20223 attack by raising the effort for a relay to become Stable to
20224 require at the very least 7 days, while maintaining the 96 hours
20225 uptime requirement for HSDir. Implements ticket 8243.
20227 o Minor features (client):
20228 - Relax the validation of hostnames in SOCKS5 requests, allowing the
20229 character '_' to appear, in order to cope with domains observed in
20230 the wild that are serving non-RFC compliant records. Resolves
20232 - Relax the validation done to hostnames in SOCKS5 requests, and
20233 allow a single trailing '.' to cope with clients that pass FQDNs
20234 using that syntax to explicitly indicate that the domain name is
20235 fully-qualified. Fixes bug 16674; bugfix on 0.2.6.2-alpha.
20236 - Add GroupWritable and WorldWritable options to unix-socket based
20237 SocksPort and ControlPort options. These options apply to a single
20238 socket, and override {Control,Socks}SocketsGroupWritable. Closes
20241 o Minor features (control protocol):
20242 - Support network-liveness GETINFO key and NETWORK_LIVENESS event in
20243 the control protocol. Resolves ticket 15358.
20245 o Minor features (directory authorities):
20246 - Directory authorities no longer vote against the "Fast", "Stable",
20247 and "HSDir" flags just because they were going to vote against
20248 "Running": if the consensus turns out to be that the router was
20249 running, then the authority's vote should count. Patch from Peter
20250 Retzlaff; closes issue 8712.
20252 o Minor features (geoip, also in 0.2.6.10):
20253 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
20254 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
20256 o Minor features (hidden services):
20257 - Add the new options "HiddenServiceMaxStreams" and
20258 "HiddenServiceMaxStreamsCloseCircuit" to allow hidden services to
20259 limit the maximum number of simultaneous streams per circuit, and
20260 optionally tear down the circuit when the limit is exceeded. Part
20263 o Minor features (portability):
20264 - Use C99 variadic macros when the compiler is not GCC. This avoids
20265 failing compilations on MSVC, and fixes a log-file-based race
20266 condition in our old workarounds. Original patch from Gisle Vanem.
20268 o Minor bugfixes (compilation, also in 0.2.6.9):
20269 - Build with --enable-systemd correctly when libsystemd is
20270 installed, but systemd is not. Fixes bug 16164; bugfix on
20271 0.2.6.3-alpha. Patch from Peter Palfrader.
20273 o Minor bugfixes (controller):
20274 - Add the descriptor ID in each HS_DESC control event. It was
20275 missing, but specified in control-spec.txt. Fixes bug 15881;
20276 bugfix on 0.2.5.2-alpha.
20278 o Minor bugfixes (crypto error-handling, also in 0.2.6.10):
20279 - Check for failures from crypto_early_init, and refuse to continue.
20280 A previous typo meant that we could keep going with an
20281 uninitialized crypto library, and would have OpenSSL initialize
20282 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
20283 when implementing ticket 4900. Patch by "teor".
20285 o Minor bugfixes (hidden services):
20286 - Fix a crash when reloading configuration while at least one
20287 configured and one ephemeral hidden service exists. Fixes bug
20288 16060; bugfix on 0.2.7.1-alpha.
20289 - Avoid crashing with a double-free bug when we create an ephemeral
20290 hidden service but adding it fails for some reason. Fixes bug
20291 16228; bugfix on 0.2.7.1-alpha.
20293 o Minor bugfixes (Linux seccomp2 sandbox):
20294 - Use the sandbox in tor_open_cloexec whether or not O_CLOEXEC is
20295 defined. Patch by "teor". Fixes bug 16515; bugfix on 0.2.3.1-alpha.
20297 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.10):
20298 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
20299 these when eventfd2() support is missing. Fixes bug 16363; bugfix
20300 on 0.2.6.3-alpha. Patch from "teor".
20302 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.9):
20303 - Fix sandboxing to work when running as a relay, by allowing the
20304 renaming of secret_id_key, and allowing the eventfd2 and futex
20305 syscalls. Fixes bug 16244; bugfix on 0.2.6.1-alpha. Patch by
20307 - Allow systemd connections to work with the Linux seccomp2 sandbox
20308 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
20311 o Minor bugfixes (relay):
20312 - Fix a rarely-encountered memory leak when failing to initialize
20313 the thread pool. Fixes bug 16631; bugfix on 0.2.6.3-alpha. Patch
20314 from "cypherpunks".
20316 o Minor bugfixes (systemd):
20317 - Fix an accidental formatting error that broke the systemd
20318 configuration file. Fixes bug 16152; bugfix on 0.2.7.1-alpha.
20319 - Tor's systemd unit file no longer contains extraneous spaces.
20320 These spaces would sometimes confuse tools like deb-systemd-
20321 helper. Fixes bug 16162; bugfix on 0.2.5.5-alpha.
20323 o Minor bugfixes (tests):
20324 - Use the configured Python executable when running test-stem-full.
20325 Fixes bug 16470; bugfix on 0.2.7.1-alpha.
20327 o Minor bugfixes (tests, also in 0.2.6.9):
20328 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
20329 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
20331 o Minor bugfixes (threads, comments):
20332 - Always initialize return value in compute_desc_id in rendcommon.c
20333 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
20334 - Check for NULL values in getinfo_helper_onions(). Patch by "teor".
20335 Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
20336 - Remove undefined directive-in-macro in test_util_writepid clang
20337 3.7 complains that using a preprocessor directive inside a macro
20338 invocation in test_util_writepid in test_util.c is undefined.
20339 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
20341 o Code simplification and refactoring:
20342 - Define WINVER and _WIN32_WINNT centrally, in orconfig.h, in order
20343 to ensure they remain consistent and visible everywhere.
20344 - Remove some vestigial workarounds for the MSVC6 compiler. We
20345 haven't supported that in ages.
20346 - The link authentication code has been refactored for better
20347 testability and reliability. It now uses code generated with the
20348 "trunnel" binary encoding generator, to reduce the risk of bugs
20349 due to programmer error. Done as part of ticket 12498.
20352 - Include a specific and (hopefully) accurate documentation of the
20353 torrc file's meta-format in doc/torrc_format.txt. This is mainly
20354 of interest to people writing programs to parse or generate torrc
20355 files. This document is not a commitment to long-term
20356 compatibility; some aspects of the current format are a bit
20357 ridiculous. Closes ticket 2325.
20359 o Removed features:
20360 - Tor no longer supports copies of OpenSSL that are missing support
20361 for Elliptic Curve Cryptography. (We began using ECC when
20362 available in 0.2.4.8-alpha, for more safe and efficient key
20363 negotiation.) In particular, support for at least one of P256 or
20364 P224 is now required, with manual configuration needed if only
20365 P224 is available. Resolves ticket 16140.
20366 - Tor no longer supports versions of OpenSSL before 1.0. (If you are
20367 on an operating system that has not upgraded to OpenSSL 1.0 or
20368 later, and you compile Tor from source, you will need to install a
20369 more recent OpenSSL to link Tor against.) These versions of
20370 OpenSSL are still supported by the OpenSSL, but the numerous
20371 cryptographic improvements in later OpenSSL releases makes them a
20372 clear choice. Resolves ticket 16034.
20373 - Remove the HidServDirectoryV2 option. Now all relays offer to
20374 store hidden service descriptors. Related to 16543.
20375 - Remove the VoteOnHidServDirectoriesV2 option, since all
20376 authorities have long set it to 1. Closes ticket 16543.
20379 - Document use of coverity, clang static analyzer, and clang dynamic
20380 undefined behavior and address sanitizers in doc/HACKING. Include
20381 detailed usage instructions in the blacklist. Patch by "teor".
20382 Closes ticket 15817.
20383 - The link authentication protocol code now has extensive tests.
20384 - The relay descriptor signature testing code now has
20386 - The test_workqueue program now runs faster, and is enabled by
20387 default as a part of "make check".
20388 - Now that OpenSSL has its own scrypt implementation, add an unit
20389 test that checks for interoperability between libscrypt_scrypt()
20390 and OpenSSL's EVP_PBE_scrypt() so that we could not use libscrypt
20391 and rely on EVP_PBE_scrypt() whenever possible. Resolves
20395 Changes in version 0.2.6.10 - 2015-07-12
20396 Tor version 0.2.6.10 fixes some significant stability and hidden
20397 service client bugs, bulletproofs the cryptography init process, and
20398 fixes a bug when using the sandbox code with some older versions of
20399 Linux. Everyone running an older version, especially an older version
20400 of 0.2.6, should upgrade.
20402 o Major bugfixes (hidden service clients, stability):
20403 - Stop refusing to store updated hidden service descriptors on a
20404 client. This reverts commit 9407040c59218 (which indeed fixed bug
20405 14219, but introduced a major hidden service reachability
20406 regression detailed in bug 16381). This is a temporary fix since
20407 we can live with the minor issue in bug 14219 (it just results in
20408 some load on the network) but the regression of 16381 is too much
20409 of a setback. First-round fix for bug 16381; bugfix
20412 o Major bugfixes (stability):
20413 - Stop crashing with an assertion failure when parsing certain kinds
20414 of malformed or truncated microdescriptors. Fixes bug 16400;
20415 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
20416 by "cypherpunks_backup".
20417 - Stop random client-side assertion failures that could occur when
20418 connecting to a busy hidden service, or connecting to a hidden
20419 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
20422 o Minor features (geoip):
20423 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
20424 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
20426 o Minor bugfixes (crypto error-handling):
20427 - Check for failures from crypto_early_init, and refuse to continue.
20428 A previous typo meant that we could keep going with an
20429 uninitialized crypto library, and would have OpenSSL initialize
20430 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
20431 when implementing ticket 4900. Patch by "teor".
20433 o Minor bugfixes (Linux seccomp2 sandbox):
20434 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
20435 these when eventfd2() support is missing. Fixes bug 16363; bugfix
20436 on 0.2.6.3-alpha. Patch from "teor".
20439 Changes in version 0.2.6.9 - 2015-06-11
20440 Tor 0.2.6.9 fixes a regression in the circuit isolation code, increases the
20441 requirements for receiving an HSDir flag, and addresses some other small
20442 bugs in the systemd and sandbox code. Clients using circuit isolation
20443 should upgrade; all directory authorities should upgrade.
20445 o Major bugfixes (client-side privacy):
20446 - Properly separate out each SOCKSPort when applying stream
20447 isolation. The error occurred because each port's session group was
20448 being overwritten by a default value when the listener connection
20449 was initialized. Fixes bug 16247; bugfix on 0.2.6.3-alpha. Patch
20452 o Minor feature (directory authorities, security):
20453 - The HSDir flag given by authorities now requires the Stable flag.
20454 For the current network, this results in going from 2887 to 2806
20455 HSDirs. Also, it makes it harder for an attacker to launch a sybil
20456 attack by raising the effort for a relay to become Stable which
20457 takes at the very least 7 days to do so and by keeping the 96
20458 hours uptime requirement for HSDir. Implements ticket 8243.
20460 o Minor bugfixes (compilation):
20461 - Build with --enable-systemd correctly when libsystemd is
20462 installed, but systemd is not. Fixes bug 16164; bugfix on
20463 0.2.6.3-alpha. Patch from Peter Palfrader.
20465 o Minor bugfixes (Linux seccomp2 sandbox):
20466 - Fix sandboxing to work when running as a relaymby renaming of
20467 secret_id_key, and allowing the eventfd2 and futex syscalls. Fixes
20468 bug 16244; bugfix on 0.2.6.1-alpha. Patch by Peter Palfrader.
20469 - Allow systemd connections to work with the Linux seccomp2 sandbox
20470 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
20473 o Minor bugfixes (tests):
20474 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
20475 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
20478 Changes in version 0.2.6.8 - 2015-05-21
20479 Tor 0.2.6.8 fixes a bit of dodgy code in parsing INTRODUCE2 cells, and
20480 fixes an authority-side bug in assigning the HSDir flag. All directory
20481 authorities should upgrade.
20483 o Major bugfixes (hidden services, backport from 0.2.7.1-alpha):
20484 - Revert commit that made directory authorities assign the HSDir
20485 flag to relays without a DirPort; this was bad because such relays
20486 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
20489 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
20490 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
20491 a client authorized hidden service. Fixes bug 15823; bugfix
20494 o Minor features (geoip):
20495 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
20496 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
20500 Changes in version 0.2.7.1-alpha - 2015-05-12
20501 Tor 0.2.7.1-alpha is the first alpha release in its series. It
20502 includes numerous small features and bugfixes against previous Tor
20503 versions, and numerous small infrastructure improvements. The most
20504 notable features are several new ways for controllers to interact with
20505 the hidden services subsystem.
20507 o New system requirements:
20508 - Tor no longer includes workarounds to support Libevent versions
20509 before 1.3e. Libevent 2.0 or later is recommended. Closes
20512 o Major features (controller):
20513 - Add the ADD_ONION and DEL_ONION commands that allow the creation
20514 and management of hidden services via the controller. Closes
20516 - New "GETINFO onions/current" and "GETINFO onions/detached"
20517 commands to get information about hidden services created via the
20518 controller. Part of ticket 6411.
20519 - New HSFETCH command to launch a request for a hidden service
20520 descriptor. Closes ticket 14847.
20521 - New HSPOST command to upload a hidden service descriptor. Closes
20522 ticket 3523. Patch by "DonnchaC".
20524 o Major bugfixes (hidden services):
20525 - Revert commit that made directory authorities assign the HSDir
20526 flag to relays without a DirPort; this was bad because such relays
20527 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
20530 o Minor features (clock-jump tolerance):
20531 - Recover better when our clock jumps back many hours, like might
20532 happen for Tails or Whonix users who start with a very wrong
20533 hardware clock, use Tor to discover a more accurate time, and then
20534 fix their clock. Resolves part of ticket 8766.
20536 o Minor features (command-line interface):
20537 - Make --hash-password imply --hush to prevent unnecessary noise.
20538 Closes ticket 15542. Patch from "cypherpunks".
20539 - Print a warning whenever we find a relative file path being used
20540 as torrc option. Resolves issue 14018.
20542 o Minor features (controller):
20543 - Add DirAuthority lines for default directory authorities to the
20544 output of the "GETINFO config/defaults" command if not already
20545 present. Implements ticket 14840.
20546 - Controllers can now use "GETINFO hs/client/desc/id/..." to
20547 retrieve items from the client's hidden service descriptor cache.
20548 Closes ticket 14845.
20549 - Implement a new controller command "GETINFO status/fresh-relay-
20550 descs" to fetch a descriptor/extrainfo pair that was generated on
20551 demand just for the controller's use. Implements ticket 14784.
20553 o Minor features (DoS-resistance):
20554 - Make it harder for attackers to overload hidden services with
20555 introductions, by blocking multiple introduction requests on the
20556 same circuit. Resolves ticket 15515.
20558 o Minor features (geoip):
20559 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
20560 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
20563 o Minor features (HS popularity countermeasure):
20564 - To avoid leaking HS popularity, don't cycle the introduction point
20565 when we've handled a fixed number of INTRODUCE2 cells but instead
20566 cycle it when a random number of introductions is reached, thus
20567 making it more difficult for an attacker to find out the amount of
20568 clients that have used the introduction point for a specific HS.
20569 Closes ticket 15745.
20571 o Minor features (logging):
20572 - Include the Tor version in all LD_BUG log messages, since people
20573 tend to cut and paste those into the bugtracker. Implements
20576 o Minor features (pluggable transports):
20577 - When launching managed pluggable transports on Linux systems,
20578 attempt to have the kernel deliver a SIGTERM on tor exit if the
20579 pluggable transport process is still running. Resolves
20581 - When launching managed pluggable transports, setup a valid open
20582 stdin in the child process that can be used to detect if tor has
20583 terminated. The "TOR_PT_EXIT_ON_STDIN_CLOSE" environment variable
20584 can be used by implementations to detect this new behavior.
20585 Resolves ticket 15435.
20587 o Minor features (testing):
20588 - Add a test to verify that the compiler does not eliminate our
20589 memwipe() implementation. Closes ticket 15377.
20590 - Add make rule `check-changes` to verify the format of changes
20591 files. Closes ticket 15180.
20592 - Add unit tests for control_event_is_interesting(). Add a compile-
20593 time check that the number of events doesn't exceed the capacity
20594 of control_event_t.event_mask. Closes ticket 15431, checks for
20595 bugs similar to 13085. Patch by "teor".
20596 - Command-line argument tests moved to Stem. Resolves ticket 14806.
20597 - Integrate the ntor, backtrace, and zero-length keys tests into the
20598 automake test suite. Closes ticket 15344.
20599 - Remove assertions during builds to determine Tor's test coverage.
20600 We don't want to trigger these even in assertions, so including
20601 them artificially makes our branch coverage look worse than it is.
20602 This patch provides the new test-stem-full and coverage-html-full
20603 configure options. Implements ticket 15400.
20605 o Minor bugfixes (build):
20606 - Improve out-of-tree builds by making non-standard rules work and
20607 clean up additional files and directories. Fixes bug 15053; bugfix
20610 o Minor bugfixes (command-line interface):
20611 - When "--quiet" is provided along with "--validate-config", do not
20612 write anything to stdout on success. Fixes bug 14994; bugfix
20614 - When complaining about bad arguments to "--dump-config", use
20615 stderr, not stdout.
20617 o Minor bugfixes (configuration, unit tests):
20618 - Only add the default fallback directories when the DirAuthorities,
20619 AlternateDirAuthority, and FallbackDir directory config options
20620 are set to their defaults. The default fallback directory list is
20621 currently empty, this fix will only change tor's behavior when it
20622 has default fallback directories. Includes unit tests for
20623 consider_adding_dir_servers(). Fixes bug 15642; bugfix on
20624 90f6071d8dc0 in 0.2.4.7-alpha. Patch by "teor".
20626 o Minor bugfixes (correctness):
20627 - For correctness, avoid modifying a constant string in
20628 handle_control_postdescriptor. Fixes bug 15546; bugfix
20630 - Remove side-effects from tor_assert() calls. This was harmless,
20631 because we never disable assertions, but it is bad style and
20632 unnecessary. Fixes bug 15211; bugfix on 0.2.5.5, 0.2.2.36,
20635 o Minor bugfixes (hidden service):
20636 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
20637 a client authorized hidden service. Fixes bug 15823; bugfix
20639 - Remove an extraneous newline character from the end of hidden
20640 service descriptors. Fixes bug 15296; bugfix on 0.2.0.10-alpha.
20642 o Minor bugfixes (interface):
20643 - Print usage information for --dump-config when it is used without
20644 an argument. Also, fix the error message to use different wording
20645 and add newline at the end. Fixes bug 15541; bugfix
20648 o Minor bugfixes (logs):
20649 - When building Tor under Clang, do not include an extra set of
20650 parentheses in log messages that include function names. Fixes bug
20651 15269; bugfix on every released version of Tor when compiled with
20652 recent enough Clang.
20654 o Minor bugfixes (network):
20655 - When attempting to use fallback technique for network interface
20656 lookup, disregard loopback and multicast addresses since they are
20657 unsuitable for public communications.
20659 o Minor bugfixes (statistics):
20660 - Disregard the ConnDirectionStatistics torrc options when Tor is
20661 not a relay since in that mode of operation no sensible data is
20662 being collected and because Tor might run into measurement hiccups
20663 when running as a client for some time, then becoming a relay.
20664 Fixes bug 15604; bugfix on 0.2.2.35.
20666 o Minor bugfixes (test networks):
20667 - When self-testing reachability, use ExtendAllowPrivateAddresses to
20668 determine if local/private addresses imply reachability. The
20669 previous fix used TestingTorNetwork, which implies
20670 ExtendAllowPrivateAddresses, but this excluded rare configurations
20671 where ExtendAllowPrivateAddresses is set but TestingTorNetwork is
20672 not. Fixes bug 15771; bugfix on 0.2.6.1-alpha. Patch by "teor",
20673 issue discovered by CJ Ess.
20675 o Minor bugfixes (testing):
20676 - Check for matching value in server response in ntor_ref.py. Fixes
20677 bug 15591; bugfix on 0.2.4.8-alpha. Reported and fixed
20679 - Set the severity correctly when testing
20680 get_interface_addresses_ifaddrs() and
20681 get_interface_addresses_win32(), so that the tests fail gracefully
20682 instead of triggering an assertion. Fixes bug 15759; bugfix on
20683 0.2.6.3-alpha. Reported by Nicolas Derive.
20685 o Code simplification and refactoring:
20686 - Move the hacky fallback code out of get_interface_address6() into
20687 separate function and get it covered with unit-tests. Resolves
20689 - Refactor hidden service client-side cache lookup to intelligently
20690 report its various failure cases, and disentangle failure cases
20691 involving a lack of introduction points. Closes ticket 14391.
20692 - Use our own Base64 encoder instead of OpenSSL's, to allow more
20693 control over the output. Part of ticket 15652.
20696 - Improve the descriptions of statistics-related torrc options in
20697 the manpage to describe rationale and possible uses cases. Fixes
20699 - Improve the layout and formatting of ./configure --help messages.
20700 Closes ticket 15024. Patch from "cypherpunks".
20701 - Standardize on the term "server descriptor" in the manual page.
20702 Previously, we had used "router descriptor", "server descriptor",
20703 and "relay descriptor" interchangeably. Part of ticket 14987.
20706 - Remove `USE_OPENSSL_BASE64` and the corresponding fallback code
20707 and always use the internal Base64 decoder. The internal decoder
20708 has been part of tor since 0.2.0.10-alpha, and no one should
20709 be using the OpenSSL one. Part of ticket 15652.
20710 - Remove the 'tor_strclear()' function; use memwipe() instead.
20711 Closes ticket 14922.
20713 o Removed features:
20714 - Remove the (seldom-used) DynamicDHGroups feature. For anti-
20715 fingerprinting we now recommend pluggable transports; for forward-
20716 secrecy in TLS, we now use the P-256 group. Closes ticket 13736.
20717 - Remove the undocumented "--digests" command-line option. It
20718 complicated our build process, caused subtle build issues on
20719 multiple platforms, and is now redundant since we started
20720 including git version identifiers. Closes ticket 14742.
20721 - Tor no longer contains checks for ancient directory cache versions
20722 that didn't know about microdescriptors.
20723 - Tor no longer contains workarounds for stat files generated by
20724 super-old versions of Tor that didn't choose guards sensibly.
20727 Changes in version 0.2.4.27 - 2015-04-06
20728 Tor 0.2.4.27 backports two fixes from 0.2.6.7 for security issues that
20729 could be used by an attacker to crash hidden services, or crash clients
20730 visiting hidden services. Hidden services should upgrade as soon as
20731 possible; clients should upgrade whenever packages become available.
20733 This release also backports a simple improvement to make hidden
20734 services a bit less vulnerable to denial-of-service attacks.
20736 o Major bugfixes (security, hidden service):
20737 - Fix an issue that would allow a malicious client to trigger an
20738 assertion failure and halt a hidden service. Fixes bug 15600;
20739 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
20740 - Fix a bug that could cause a client to crash with an assertion
20741 failure when parsing a malformed hidden service descriptor. Fixes
20742 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
20744 o Minor features (DoS-resistance, hidden service):
20745 - Introduction points no longer allow multiple INTRODUCE1 cells to
20746 arrive on the same circuit. This should make it more expensive for
20747 attackers to overwhelm hidden services with introductions.
20748 Resolves ticket 15515.
20751 Changes in version 0.2.5.12 - 2015-04-06
20752 Tor 0.2.5.12 backports two fixes from 0.2.6.7 for security issues that
20753 could be used by an attacker to crash hidden services, or crash clients
20754 visiting hidden services. Hidden services should upgrade as soon as
20755 possible; clients should upgrade whenever packages become available.
20757 This release also backports a simple improvement to make hidden
20758 services a bit less vulnerable to denial-of-service attacks.
20760 o Major bugfixes (security, hidden service):
20761 - Fix an issue that would allow a malicious client to trigger an
20762 assertion failure and halt a hidden service. Fixes bug 15600;
20763 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
20764 - Fix a bug that could cause a client to crash with an assertion
20765 failure when parsing a malformed hidden service descriptor. Fixes
20766 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
20768 o Minor features (DoS-resistance, hidden service):
20769 - Introduction points no longer allow multiple INTRODUCE1 cells to
20770 arrive on the same circuit. This should make it more expensive for
20771 attackers to overwhelm hidden services with introductions.
20772 Resolves ticket 15515.
20775 Changes in version 0.2.6.7 - 2015-04-06
20776 Tor 0.2.6.7 fixes two security issues that could be used by an
20777 attacker to crash hidden services, or crash clients visiting hidden
20778 services. Hidden services should upgrade as soon as possible; clients
20779 should upgrade whenever packages become available.
20781 This release also contains two simple improvements to make hidden
20782 services a bit less vulnerable to denial-of-service attacks.
20784 o Major bugfixes (security, hidden service):
20785 - Fix an issue that would allow a malicious client to trigger an
20786 assertion failure and halt a hidden service. Fixes bug 15600;
20787 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
20788 - Fix a bug that could cause a client to crash with an assertion
20789 failure when parsing a malformed hidden service descriptor. Fixes
20790 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
20792 o Minor features (DoS-resistance, hidden service):
20793 - Introduction points no longer allow multiple INTRODUCE1 cells to
20794 arrive on the same circuit. This should make it more expensive for
20795 attackers to overwhelm hidden services with introductions.
20796 Resolves ticket 15515.
20797 - Decrease the amount of reattempts that a hidden service performs
20798 when its rendezvous circuits fail. This reduces the computational
20799 cost for running a hidden service under heavy load. Resolves
20803 Changes in version 0.2.6.6 - 2015-03-24
20804 Tor 0.2.6.6 is the first stable release in the 0.2.6 series.
20806 It adds numerous safety, security, correctness, and performance
20807 improvements. Client programs can be configured to use more kinds of
20808 sockets, AutomapHosts works better, the multithreading backend is
20809 improved, cell transmission is refactored, test coverage is much
20810 higher, more denial-of-service attacks are handled, guard selection is
20811 improved to handle long-term guards better, pluggable transports
20812 should work a bit better, and some annoying hidden service performance
20813 bugs should be addressed.
20815 o Minor bugfixes (portability):
20816 - Use the correct datatype in the SipHash-2-4 function to prevent
20817 compilers from assuming any sort of alignment. Fixes bug 15436;
20818 bugfix on 0.2.5.3-alpha.
20820 Changes in version 0.2.6.5-rc - 2015-03-18
20821 Tor 0.2.6.5-rc is the second and (hopefully) last release candidate in
20822 the 0.2.6. It fixes a small number of bugs found in 0.2.6.4-rc.
20824 o Major bugfixes (client):
20825 - Avoid crashing when making certain configuration option changes on
20826 clients. Fixes bug 15245; bugfix on 0.2.6.3-alpha. Reported
20829 o Major bugfixes (pluggable transports):
20830 - Initialize the extended OR Port authentication cookie before
20831 launching pluggable transports. This prevents a race condition
20832 that occurred when server-side pluggable transports would cache the
20833 authentication cookie before it has been (re)generated. Fixes bug
20834 15240; bugfix on 0.2.5.1-alpha.
20836 o Major bugfixes (portability):
20837 - Do not crash on startup when running on Solaris. Fixes a bug
20838 related to our fix for 9495; bugfix on 0.2.6.1-alpha. Reported
20841 o Minor features (heartbeat):
20842 - On relays, report how many connections we negotiated using each
20843 version of the Tor link protocols. This information will let us
20844 know if removing support for very old versions of the Tor
20845 protocols is harming the network. Closes ticket 15212.
20847 o Code simplification and refactoring:
20848 - Refactor main loop to extract the 'loop' part. This makes it
20849 easier to run Tor under Shadow. Closes ticket 15176.
20852 Changes in version 0.2.5.11 - 2015-03-17
20853 Tor 0.2.5.11 is the second stable release in the 0.2.5 series.
20855 It backports several bugfixes from the 0.2.6 branch, including a
20856 couple of medium-level security fixes for relays and exit nodes.
20857 It also updates the list of directory authorities.
20859 o Directory authority changes:
20860 - Remove turtles as a directory authority.
20861 - Add longclaw as a new (v3) directory authority. This implements
20862 ticket 13296. This keeps the directory authority count at 9.
20863 - The directory authority Faravahar has a new IP address. This
20864 closes ticket 14487.
20866 o Major bugfixes (crash, OSX, security):
20867 - Fix a remote denial-of-service opportunity caused by a bug in
20868 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
20871 o Major bugfixes (relay, stability, possible security):
20872 - Fix a bug that could lead to a relay crashing with an assertion
20873 failure if a buffer of exactly the wrong layout was passed to
20874 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
20875 0.2.0.10-alpha. Patch from 'cypherpunks'.
20876 - Do not assert if the 'data' pointer on a buffer is advanced to the
20877 very end of the buffer; log a BUG message instead. Only assert if
20878 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
20880 o Major bugfixes (exit node stability):
20881 - Fix an assertion failure that could occur under high DNS load.
20882 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
20883 diagnosed and fixed by "cypherpunks".
20885 o Major bugfixes (Linux seccomp2 sandbox):
20886 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
20887 crash during attempts to call wait4. Fixes bug 15088; bugfix on
20888 0.2.5.1-alpha. Patch from "sanic".
20890 o Minor features (controller):
20891 - New "GETINFO bw-event-cache" to get information about recent
20892 bandwidth events. Closes ticket 14128. Useful for controllers to
20893 get recent bandwidth history after the fix for ticket 13988.
20895 o Minor features (geoip):
20896 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
20897 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
20900 o Minor bugfixes (client, automapping):
20901 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
20902 no value follows the option. Fixes bug 14142; bugfix on
20903 0.2.4.7-alpha. Patch by "teor".
20904 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
20905 14195; bugfix on 0.1.0.1-rc.
20907 o Minor bugfixes (compilation):
20908 - Build without warnings with the stock OpenSSL srtp.h header, which
20909 has a duplicate declaration of SSL_get_selected_srtp_profile().
20910 Fixes bug 14220; this is OpenSSL's bug, not ours.
20912 o Minor bugfixes (directory authority):
20913 - Allow directory authorities to fetch more data from one another if
20914 they find themselves missing lots of votes. Previously, they had
20915 been bumping against the 10 MB queued data limit. Fixes bug 14261;
20916 bugfix on 0.1.2.5-alpha.
20917 - Enlarge the buffer to read bwauth generated files to avoid an
20918 issue when parsing the file in dirserv_read_measured_bandwidths().
20919 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
20921 o Minor bugfixes (statistics):
20922 - Increase period over which bandwidth observations are aggregated
20923 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
20925 o Minor bugfixes (preventative security, C safety):
20926 - When reading a hexadecimal, base-32, or base-64 encoded value from
20927 a string, always overwrite the whole output buffer. This prevents
20928 some bugs where we would look at (but fortunately, not reveal)
20929 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
20933 Changes in version 0.2.4.26 - 2015-03-17
20934 Tor 0.2.4.26 includes an updated list of directory authorities. It
20935 also backports a couple of stability and security bugfixes from 0.2.5
20938 o Directory authority changes:
20939 - Remove turtles as a directory authority.
20940 - Add longclaw as a new (v3) directory authority. This implements
20941 ticket 13296. This keeps the directory authority count at 9.
20942 - The directory authority Faravahar has a new IP address. This
20943 closes ticket 14487.
20945 o Major bugfixes (exit node stability, also in 0.2.6.3-alpha):
20946 - Fix an assertion failure that could occur under high DNS load.
20947 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
20948 diagnosed and fixed by "cypherpunks".
20950 o Major bugfixes (relay, stability, possible security, also in 0.2.6.4-rc):
20951 - Fix a bug that could lead to a relay crashing with an assertion
20952 failure if a buffer of exactly the wrong layout was passed to
20953 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
20954 0.2.0.10-alpha. Patch from 'cypherpunks'.
20955 - Do not assert if the 'data' pointer on a buffer is advanced to the
20956 very end of the buffer; log a BUG message instead. Only assert if
20957 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
20959 o Minor features (geoip):
20960 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
20961 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
20964 Changes in version 0.2.6.4-rc - 2015-03-09
20965 Tor 0.2.6.4-alpha fixes an issue in the directory code that an
20966 attacker might be able to use in order to crash certain Tor
20967 directories. It also resolves some minor issues left over from, or
20968 introduced in, Tor 0.2.6.3-alpha or earlier.
20970 o Major bugfixes (crash, OSX, security):
20971 - Fix a remote denial-of-service opportunity caused by a bug in
20972 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
20975 o Major bugfixes (relay, stability, possible security):
20976 - Fix a bug that could lead to a relay crashing with an assertion
20977 failure if a buffer of exactly the wrong layout is passed to
20978 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
20979 0.2.0.10-alpha. Patch from "cypherpunks".
20980 - Do not assert if the 'data' pointer on a buffer is advanced to the
20981 very end of the buffer; log a BUG message instead. Only assert if
20982 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
20984 o Major bugfixes (FreeBSD IPFW transparent proxy):
20985 - Fix address detection with FreeBSD transparent proxies, when
20986 "TransProxyType ipfw" is in use. Fixes bug 15064; bugfix
20989 o Major bugfixes (Linux seccomp2 sandbox):
20990 - Pass IPPROTO_TCP rather than 0 to socket(), so that the Linux
20991 seccomp2 sandbox doesn't fail. Fixes bug 14989; bugfix
20993 - Allow AF_UNIX hidden services to be used with the seccomp2
20994 sandbox. Fixes bug 15003; bugfix on 0.2.6.3-alpha.
20995 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
20996 crash during attempts to call wait4. Fixes bug 15088; bugfix on
20997 0.2.5.1-alpha. Patch from "sanic".
20999 o Minor features (controller):
21000 - Messages about problems in the bootstrap process now include
21001 information about the server we were trying to connect to when we
21002 noticed the problem. Closes ticket 15006.
21004 o Minor features (geoip):
21005 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
21006 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
21009 o Minor features (logs):
21010 - Quiet some log messages in the heartbeat and at startup. Closes
21013 o Minor bugfixes (certificate handling):
21014 - If an authority operator accidentally makes a signing certificate
21015 with a future publication time, do not discard its real signing
21016 certificates. Fixes bug 11457; bugfix on 0.2.0.3-alpha.
21017 - Remove any old authority certificates that have been superseded
21018 for at least two days. Previously, we would keep superseded
21019 certificates until they expired, if they were published close in
21020 time to the certificate that superseded them. Fixes bug 11454;
21021 bugfix on 0.2.1.8-alpha.
21023 o Minor bugfixes (compilation):
21024 - Fix a compilation warning on s390. Fixes bug 14988; bugfix
21026 - Fix a compilation warning on FreeBSD. Fixes bug 15151; bugfix
21029 o Minor bugfixes (testing):
21030 - Fix endianness issues in unit test for resolve_my_address() to
21031 have it pass on big endian systems. Fixes bug 14980; bugfix on
21033 - Avoid a side-effect in a tor_assert() in the unit tests. Fixes bug
21034 15188; bugfix on 0.1.2.3-alpha. Patch from Tom van der Woerdt.
21035 - When running the new 'make test-stem' target, use the configured
21036 python binary. Fixes bug 15037; bugfix on 0.2.6.3-alpha. Patch
21037 from "cypherpunks".
21038 - When running the zero-length-keys tests, do not use the default
21039 torrc file. Fixes bug 15033; bugfix on 0.2.6.3-alpha. Reported
21042 o Directory authority IP change:
21043 - The directory authority Faravahar has a new IP address. This
21044 closes ticket 14487.
21047 - Remove some lingering dead code that once supported mempools.
21048 Mempools were disabled by default in 0.2.5, and removed entirely
21049 in 0.2.6.3-alpha. Closes more of ticket 14848; patch
21053 Changes in version 0.2.6.3-alpha - 2015-02-19
21054 Tor 0.2.6.3-alpha is the third (and hopefully final) alpha release in
21055 the 0.2.6.x series. It introduces support for more kinds of sockets,
21056 makes it harder to accidentally run an exit, improves our
21057 multithreading backend, incorporates several fixes for the
21058 AutomapHostsOnResolve option, and fixes numerous other bugs besides.
21060 If no major regressions or security holes are found in this version,
21061 the next version will be a release candidate.
21063 o Deprecated versions:
21064 - Tor relays older than 0.2.4.18-rc are no longer allowed to
21065 advertise themselves on the network. Closes ticket 13555.
21067 o Major features (security, unix domain sockets):
21068 - Allow SocksPort to be an AF_UNIX Unix Domain Socket. Now high risk
21069 applications can reach Tor without having to create AF_INET or
21070 AF_INET6 sockets, meaning they can completely disable their
21071 ability to make non-Tor network connections. To create a socket of
21072 this type, use "SocksPort unix:/path/to/socket". Implements
21074 - Support mapping hidden service virtual ports to AF_UNIX sockets.
21075 The syntax is "HiddenServicePort 80 unix:/path/to/socket".
21076 Implements ticket 11485.
21078 o Major features (changed defaults):
21079 - Prevent relay operators from unintentionally running exits: When a
21080 relay is configured as an exit node, we now warn the user unless
21081 the "ExitRelay" option is set to 1. We warn even more loudly if
21082 the relay is configured with the default exit policy, since this
21083 can indicate accidental misconfiguration. Setting "ExitRelay 0"
21084 stops Tor from running as an exit relay. Closes ticket 10067.
21086 o Major features (directory system):
21087 - When downloading server- or microdescriptors from a directory
21088 server, we no longer launch multiple simultaneous requests to the
21089 same server. This reduces load on the directory servers,
21090 especially when directory guards are in use. Closes ticket 9969.
21091 - When downloading server- or microdescriptors over a tunneled
21092 connection, do not limit the length of our requests to what the
21093 Squid proxy is willing to handle. Part of ticket 9969.
21094 - Authorities can now vote on the correct digests and latest
21095 versions for different software packages. This allows packages
21096 that include Tor to use the Tor authority system as a way to get
21097 notified of updates and their correct digests. Implements proposal
21098 227. Closes ticket 10395.
21100 o Major features (guards):
21101 - Introduce the Guardfraction feature to improves load balancing on
21102 guard nodes. Specifically, it aims to reduce the traffic gap that
21103 guard nodes experience when they first get the Guard flag. This is
21104 a required step if we want to increase the guard lifetime to 9
21105 months or greater. Closes ticket 9321.
21107 o Major features (performance):
21108 - Make the CPU worker implementation more efficient by avoiding the
21109 kernel and lengthening pipelines. The original implementation used
21110 sockets to transfer data from the main thread to the workers, and
21111 didn't allow any thread to be assigned more than a single piece of
21112 work at once. The new implementation avoids communications
21113 overhead by making requests in shared memory, avoiding kernel IO
21114 where possible, and keeping more requests in flight at once.
21115 Implements ticket 9682.
21117 o Major features (relay):
21118 - Raise the minimum acceptable configured bandwidth rate for bridges
21119 to 50 KiB/sec and for relays to 75 KiB/sec. (The old values were
21120 20 KiB/sec.) Closes ticket 13822.
21122 o Major bugfixes (exit node stability):
21123 - Fix an assertion failure that could occur under high DNS load.
21124 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
21125 diagnosed and fixed by "cypherpunks".
21127 o Major bugfixes (mixed relay-client operation):
21128 - When running as a relay and client at the same time (not
21129 recommended), if we decide not to use a new guard because we want
21130 to retry older guards, only close the locally-originating circuits
21131 passing through that guard. Previously we would close all the
21132 circuits through that guard. Fixes bug 9819; bugfix on
21133 0.2.1.1-alpha. Reported by "skruffy".
21135 o Minor features (build):
21136 - New --disable-system-torrc compile-time option to prevent Tor from
21137 looking for the system-wide torrc or torrc-defaults files.
21138 Resolves ticket 13037.
21140 o Minor features (controller):
21141 - Include SOCKS_USERNAME and SOCKS_PASSWORD values in controller
21142 events so controllers can observe circuit isolation inputs. Closes
21144 - ControlPort now supports the unix:/path/to/socket syntax as an
21145 alternative to the ControlSocket option, for consistency with
21146 SocksPort and HiddenServicePort. Closes ticket 14451.
21147 - New "GETINFO bw-event-cache" to get information about recent
21148 bandwidth events. Closes ticket 14128. Useful for controllers to
21149 get recent bandwidth history after the fix for ticket 13988.
21151 o Minor features (Denial of service resistance):
21152 - Count the total number of bytes used storing hidden service
21153 descriptors against the value of MaxMemInQueues. If we're low on
21154 memory, and more than 20% of our memory is used holding hidden
21155 service descriptors, free them until no more than 10% of our
21156 memory holds hidden service descriptors. Free the least recently
21157 fetched descriptors first. Resolves ticket 13806.
21158 - When we have recently been under memory pressure (over 3/4 of
21159 MaxMemInQueues is allocated), then allocate smaller zlib objects
21160 for small requests. Closes ticket 11791.
21162 o Minor features (geoip):
21163 - Update geoip and geoip6 files to the January 7 2015 Maxmind
21164 GeoLite2 Country database.
21166 o Minor features (guard nodes):
21167 - Reduce the time delay before saving guard status to disk from 10
21168 minutes to 30 seconds (or from one hour to 10 minutes if
21169 AvoidDiskWrites is set). Closes ticket 12485.
21171 o Minor features (hidden service):
21172 - Make Sybil attacks against hidden services harder by changing the
21173 minimum time required to get the HSDir flag from 25 hours up to 96
21174 hours. Addresses ticket 14149.
21175 - New option "HiddenServiceAllowUnknownPorts" to allow hidden
21176 services to disable the anti-scanning feature introduced in
21177 0.2.6.2-alpha. With this option not set, a connection to an
21178 unlisted port closes the circuit. With this option set, only a
21179 RELAY_DONE cell is sent. Closes ticket 14084.
21181 o Minor features (interface):
21182 - Implement "-f -" command-line option to read torrc configuration
21183 from standard input, if you don't want to store the torrc file in
21184 the file system. Implements feature 13865.
21186 o Minor features (logging):
21187 - Add a count of unique clients to the bridge heartbeat message.
21188 Resolves ticket 6852.
21189 - Suppress "router info incompatible with extra info" message when
21190 reading extrainfo documents from cache. (This message got loud
21191 around when we closed bug 9812 in 0.2.6.2-alpha.) Closes
21193 - Elevate hidden service authorized-client message from DEBUG to
21194 INFO. Closes ticket 14015.
21196 o Minor features (stability):
21197 - Add assertions in our hash-table iteration code to check for
21198 corrupted values that could cause infinite loops. Closes
21201 o Minor features (systemd):
21202 - Various improvements and modernizations in systemd hardening
21203 support. Closes ticket 13805. Patch from Craig Andrews.
21205 o Minor features (testing networks):
21206 - Drop the minimum RendPostPeriod on a testing network to 5 seconds,
21207 and the default on a testing network to 2 minutes. Drop the
21208 MIN_REND_INITIAL_POST_DELAY on a testing network to 5 seconds, but
21209 keep the default on a testing network at 30 seconds. This reduces
21210 HS bootstrap time to around 25 seconds. Also, change the default
21211 time in test-network.sh to match. Closes ticket 13401. Patch
21213 - Create TestingDirAuthVoteHSDir to correspond to
21214 TestingDirAuthVoteExit/Guard. Ensures that authorities vote the
21215 HSDir flag for the listed relays regardless of uptime or ORPort
21216 connectivity. Respects the value of VoteOnHidServDirectoriesV2.
21217 Partial implementation for ticket 14067. Patch by "teor".
21219 o Minor features (tor2web mode):
21220 - Introduce the config option Tor2webRendezvousPoints, which allows
21221 clients in Tor2webMode to select a specific Rendezvous Point to be
21222 used in HS circuits. This might allow better performance for
21223 Tor2Web nodes. Implements ticket 12844.
21225 o Minor bugfixes (client DNS):
21226 - Report the correct cached DNS expiration times on SOCKS port or in
21227 DNS replies. Previously, we would report everything as "never
21228 expires." Fixes bug 14193; bugfix on 0.2.3.17-beta.
21229 - Avoid a small memory leak when we find a cached answer for a
21230 reverse DNS lookup in a client-side DNS cache. (Remember, client-
21231 side DNS caching is off by default, and is not recommended.) Fixes
21232 bug 14259; bugfix on 0.2.0.1-alpha.
21234 o Minor bugfixes (client, automapping):
21235 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
21236 no value follows the option. Fixes bug 14142; bugfix on
21237 0.2.4.7-alpha. Patch by "teor".
21238 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
21239 14195; bugfix on 0.1.0.1-rc.
21240 - Prevent changes to other options from removing the wildcard value
21241 "." from "AutomapHostsSuffixes". Fixes bug 12509; bugfix
21243 - Allow MapAddress and AutomapHostsOnResolve to work together when
21244 an address is mapped into another address type (like .onion) that
21245 must be automapped at resolve time. Fixes bug 7555; bugfix
21248 o Minor bugfixes (client, bridges):
21249 - When we are using bridges and we had a network connectivity
21250 problem, only retry connecting to our currently configured
21251 bridges, not all bridges we know about and remember using. Fixes
21252 bug 14216; bugfix on 0.2.2.17-alpha.
21254 o Minor bugfixes (client, IPv6):
21255 - Reject socks requests to literal IPv6 addresses when IPv6Traffic
21256 flag is not set; and not because the NoIPv4Traffic flag was set.
21257 Previously we'd looked at the NoIPv4Traffic flag for both types of
21258 literal addresses. Fixes bug 14280; bugfix on 0.2.4.7-alpha.
21260 o Minor bugfixes (compilation):
21261 - The address of an array in the middle of a structure will always
21262 be non-NULL. clang recognises this and complains. Disable the
21263 tautologous and redundant check to silence this warning. Fixes bug
21264 14001; bugfix on 0.2.1.2-alpha.
21265 - Avoid warnings when building with systemd 209 or later. Fixes bug
21266 14072; bugfix on 0.2.6.2-alpha. Patch from "h.venev".
21267 - Compile correctly with (unreleased) OpenSSL 1.1.0 headers.
21268 Addresses ticket 14188.
21269 - Build without warnings with the stock OpenSSL srtp.h header, which
21270 has a duplicate declaration of SSL_get_selected_srtp_profile().
21271 Fixes bug 14220; this is OpenSSL's bug, not ours.
21272 - Do not compile any code related to Tor2Web mode when Tor2Web mode
21273 is not enabled at compile time. Previously, this code was included
21274 in a disabled state. See discussion on ticket 12844.
21275 - Remove the --disable-threads configure option again. It was
21276 accidentally partially reintroduced in 29ac883606d6d. Fixes bug
21277 14819; bugfix on 0.2.6.2-alpha.
21279 o Minor bugfixes (controller):
21280 - Report "down" in response to the "GETINFO entry-guards" command
21281 when relays are down with an unreachable_since value. Previously,
21282 we would report "up". Fixes bug 14184; bugfix on 0.1.2.2-alpha.
21283 - Avoid crashing on a malformed EXTENDCIRCUIT command. Fixes bug
21284 14116; bugfix on 0.2.2.9-alpha.
21285 - Add a code for the END_CIRC_REASON_IP_NOW_REDUNDANT circuit close
21286 reason. Fixes bug 14207; bugfix on 0.2.6.2-alpha.
21288 o Minor bugfixes (directory authority):
21289 - Allow directory authorities to fetch more data from one another if
21290 they find themselves missing lots of votes. Previously, they had
21291 been bumping against the 10 MB queued data limit. Fixes bug 14261;
21292 bugfix on 0.1.2.5-alpha.
21293 - Do not attempt to download extrainfo documents which we will be
21294 unable to validate with a matching server descriptor. Fixes bug
21295 13762; bugfix on 0.2.0.1-alpha.
21296 - Fix a bug that was truncating AUTHDIR_NEWDESC events sent to the
21297 control port. Fixes bug 14953; bugfix on 0.2.0.1-alpha.
21298 - Enlarge the buffer to read bwauth generated files to avoid an
21299 issue when parsing the file in dirserv_read_measured_bandwidths().
21300 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
21302 o Minor bugfixes (file handling):
21303 - Stop failing when key files are zero-length. Instead, generate new
21304 keys, and overwrite the empty key files. Fixes bug 13111; bugfix
21305 on all versions of Tor. Patch by "teor".
21306 - Stop generating a fresh .old RSA onion key file when the .old file
21307 is missing. Fixes part of 13111; bugfix on 0.0.6rc1.
21308 - Avoid overwriting .old key files with empty key files.
21309 - Skip loading zero-length extrainfo store, router store, stats,
21310 state, and key files.
21311 - Avoid crashing when trying to reload a torrc specified as a
21312 relative path with RunAsDaemon turned on. Fixes bug 13397; bugfix
21315 o Minor bugfixes (hidden services):
21316 - Close the introduction circuit when we have no more usable intro
21317 points, instead of waiting for it to time out. This also ensures
21318 that no follow-up HS descriptor fetch is triggered when the
21319 circuit eventually times out. Fixes bug 14224; bugfix on 0.0.6.
21320 - When fetching a hidden service descriptor for a down service that
21321 was recently up, do not keep refetching until we try the same
21322 replica twice in a row. Fixes bug 14219; bugfix on 0.2.0.10-alpha.
21323 - Successfully launch Tor with a nonexistent hidden service
21324 directory. Our fix for bug 13942 didn't catch this case. Fixes bug
21325 14106; bugfix on 0.2.6.2-alpha.
21327 o Minor bugfixes (logging):
21328 - Avoid crashing when there are more log domains than entries in
21329 domain_list. Bugfix on 0.2.3.1-alpha.
21330 - Add a string representation for LD_SCHED. Fixes bug 14740; bugfix
21332 - Don't log messages to stdout twice when starting up. Fixes bug
21333 13993; bugfix on 0.2.6.1-alpha.
21335 o Minor bugfixes (parsing):
21336 - Stop accepting milliseconds (or other junk) at the end of
21337 descriptor publication times. Fixes bug 9286; bugfix on 0.0.2pre25.
21338 - Support two-number and three-number version numbers correctly, in
21339 case we change the Tor versioning system in the future. Fixes bug
21340 13661; bugfix on 0.0.8pre1.
21342 o Minor bugfixes (path counting):
21343 - When deciding whether the consensus lists any exit nodes, count
21344 the number listed in the consensus, not the number we have
21345 descriptors for. Fixes part of bug 14918; bugfix on 0.2.6.2-alpha.
21346 - When deciding whether we have any exit nodes, only examine
21347 ExitNodes when the ExitNodes option is actually set. Fixes part of
21348 bug 14918; bugfix on 0.2.6.2-alpha.
21349 - Get rid of redundant and possibly scary warnings that we are
21350 missing directory information while we bootstrap. Fixes part of
21351 bug 14918; bugfix on 0.2.6.2-alpha.
21353 o Minor bugfixes (portability):
21354 - Fix the ioctl()-based network interface lookup code so that it
21355 will work on systems that have variable-length struct ifreq, for
21357 - Fix scheduler compilation on targets where char is unsigned. Fixes
21358 bug 14764; bugfix on 0.2.6.2-alpha. Reported by Christian Kujau.
21360 o Minor bugfixes (sandbox):
21361 - Allow glibc fatal errors to be sent to stderr before Tor exits.
21362 Previously, glibc would try to write them to /dev/tty, and the
21363 sandbox would trap the call and make Tor exit prematurely. Fixes
21364 bug 14759; bugfix on 0.2.5.1-alpha.
21366 o Minor bugfixes (shutdown):
21367 - When shutting down, always call event_del() on lingering read or
21368 write events before freeing them. Otherwise, we risk double-frees
21369 or read-after-frees in event_base_free(). Fixes bug 12985; bugfix
21372 o Minor bugfixes (small memory leaks):
21373 - Avoid leaking memory when using IPv6 virtual address mappings.
21374 Fixes bug 14123; bugfix on 0.2.4.7-alpha. Patch by Tom van
21377 o Minor bugfixes (statistics):
21378 - Increase period over which bandwidth observations are aggregated
21379 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
21381 o Minor bugfixes (systemd support):
21382 - Fix detection and operation of systemd watchdog. Fixes part of bug
21383 14141; bugfix on 0.2.6.2-alpha. Patch from Tomasz Torcz.
21384 - Run correctly under systemd with the RunAsDaemon option set. Fixes
21385 part of bug 14141; bugfix on 0.2.5.7-rc. Patch from Tomasz Torcz.
21386 - Inform the systemd supervisor about more changes in the Tor
21387 process status. Implements part of ticket 14141. Patch from
21389 - Cause the "--disable-systemd" option to actually disable systemd
21390 support. Fixes bug 14350; bugfix on 0.2.6.2-alpha. Patch
21393 o Minor bugfixes (TLS):
21394 - Check more thoroughly throughout the TLS code for possible
21395 unlogged TLS errors. Possible diagnostic or fix for bug 13319.
21397 o Minor bugfixes (transparent proxy):
21398 - Use getsockname, not getsockopt, to retrieve the address for a
21399 TPROXY-redirected connection. Fixes bug 13796; bugfix
21402 o Code simplification and refactoring:
21403 - Move fields related to isolating and configuring client ports into
21404 a shared structure. Previously, they were duplicated across
21405 port_cfg_t, listener_connection_t, and edge_connection_t. Failure
21406 to copy them correctly had been the cause of at least one bug in
21407 the past. Closes ticket 8546.
21408 - Refactor the get_interface_addresses_raw() doom-function into
21409 multiple smaller and simpler subfunctions. Cover the resulting
21410 subfunctions with unit-tests. Fixes a significant portion of
21412 - Remove workaround in dirserv_thinks_router_is_hs_dir() that was
21413 only for version <= 0.2.2.24 which is now deprecated. Closes
21415 - Remove a test for a long-defunct broken version-one
21419 - Adding section on OpenBSD to our TUNING document. Thanks to mmcc
21420 for writing the OpenBSD-specific tips. Resolves ticket 13702.
21421 - Make the tor-resolve documentation match its help string and its
21422 options. Resolves part of ticket 14325.
21423 - Log a more useful error message from tor-resolve when failing to
21424 look up a hidden service address. Resolves part of ticket 14325.
21426 o Downgraded warnings:
21427 - Don't warn when we've attempted to contact a relay using the wrong
21428 ntor onion key. Closes ticket 9635.
21430 o Removed features:
21431 - To avoid confusion with the "ExitRelay" option, "ExitNode" is no
21432 longer silently accepted as an alias for "ExitNodes".
21433 - The --enable-mempool and --enable-buf-freelists options, which
21434 were originally created to work around bad malloc implementations,
21435 no longer exist. They were off-by-default in 0.2.5. Closes
21439 - Make the checkdir/perms test complete successfully even if the
21440 global umask is not 022. Fixes bug 14215; bugfix on 0.2.6.2-alpha.
21441 - Test that tor does not fail when key files are zero-length. Check
21442 that tor generates new keys, and overwrites the empty key files.
21443 - Test that tor generates new keys when keys are missing
21444 (existing behavior).
21445 - Test that tor does not overwrite key files that already contain
21446 data (existing behavior). Tests bug 13111. Patch by "teor".
21447 - New "make test-stem" target to run stem integration tests.
21448 Requires that the "STEM_SOURCE_DIR" environment variable be set.
21449 Closes ticket 14107.
21450 - Make the test_cmdline_args.py script work correctly on Windows.
21451 Patch from Gisle Vanem.
21452 - Move the slower unit tests into a new "./src/test/test-slow"
21453 binary that can be run independently of the other tests. Closes
21455 - Avoid undefined behavior when sampling huge values from the
21456 Laplace distribution. This made unittests fail on Raspberry Pi.
21457 Bug found by Device. Fixes bug 14090; bugfix on 0.2.6.2-alpha.
21460 Changes in version 0.2.6.2-alpha - 2014-12-31
21461 Tor 0.2.6.2-alpha is the second alpha release in the 0.2.6.x series.
21462 It introduces a major new backend for deciding when to send cells on
21463 channels, which should lead down the road to big performance
21464 increases. It contains security and statistics features for better
21465 work on hidden services, and numerous bugfixes.
21467 This release contains many new unit tests, along with major
21468 performance improvements for running testing networks using Chutney.
21469 Thanks to a series of patches contributed by "teor", testing networks
21470 should now bootstrap in seconds, rather than minutes.
21472 o Major features (relay, infrastructure):
21473 - Complete revision of the code that relays use to decide which cell
21474 to send next. Formerly, we selected the best circuit to write on
21475 each channel, but we didn't select among channels in any
21476 sophisticated way. Now, we choose the best circuits globally from
21477 among those whose channels are ready to deliver traffic.
21479 This patch implements a new inter-cmux comparison API, a global
21480 high/low watermark mechanism and a global scheduler loop for
21481 transmission prioritization across all channels as well as among
21482 circuits on one channel. This schedule is currently tuned to
21483 (tolerantly) avoid making changes in network performance, but it
21484 should form the basis for major circuit performance increases in
21485 the future. Code by Andrea; tuning by Rob Jansen; implements
21488 o Major features (hidden services):
21489 - Make HS port scanning more difficult by immediately closing the
21490 circuit when a user attempts to connect to a nonexistent port.
21491 Closes ticket 13667.
21492 - Add a HiddenServiceStatistics option that allows Tor relays to
21493 gather and publish statistics about the overall size and volume of
21494 hidden service usage. Specifically, when this option is turned on,
21495 an HSDir will publish an approximate number of hidden services
21496 that have published descriptors to it the past 24 hours. Also, if
21497 a relay has acted as a hidden service rendezvous point, it will
21498 publish the approximate amount of rendezvous cells it has relayed
21499 the past 24 hours. The statistics themselves are obfuscated so
21500 that the exact values cannot be derived. For more details see
21501 proposal 238, "Better hidden service stats from Tor relays". This
21502 feature is currently disabled by default. Implements feature 13192.
21504 o Major bugfixes (client, automap):
21505 - Repair automapping with IPv6 addresses. This automapping should
21506 have worked previously, but one piece of debugging code that we
21507 inserted to detect a regression actually caused the regression to
21508 manifest itself again. Fixes bug 13811 and bug 12831; bugfix on
21509 0.2.4.7-alpha. Diagnosed and fixed by Francisco Blas
21512 o Major bugfixes (hidden services):
21513 - When closing an introduction circuit that was opened in parallel
21514 with others, don't mark the introduction point as unreachable.
21515 Previously, the first successful connection to an introduction
21516 point would make the other introduction points get marked as
21517 having timed out. Fixes bug 13698; bugfix on 0.0.6rc2.
21519 o Directory authority changes:
21520 - Remove turtles as a directory authority.
21521 - Add longclaw as a new (v3) directory authority. This implements
21522 ticket 13296. This keeps the directory authority count at 9.
21524 o Major removed features:
21525 - Tor clients no longer support connecting to hidden services
21526 running on Tor 0.2.2.x and earlier; the Support022HiddenServices
21527 option has been removed. (There shouldn't be any hidden services
21528 running these versions on the network.) Closes ticket 7803.
21530 o Minor features (client):
21531 - Validate hostnames in SOCKS5 requests more strictly. If SafeSocks
21532 is enabled, reject requests with IP addresses as hostnames.
21533 Resolves ticket 13315.
21535 o Minor features (controller):
21536 - Add a "SIGNAL HEARTBEAT" controller command that tells Tor to
21537 write an unscheduled heartbeat message to the log. Implements
21540 o Minor features (geoip):
21541 - Update geoip and geoip6 to the November 15 2014 Maxmind GeoLite2
21544 o Minor features (hidden services):
21545 - When re-enabling the network, don't try to build introduction
21546 circuits until we have successfully built a circuit. This makes
21547 hidden services come up faster when the network is re-enabled.
21548 Patch from "akwizgran". Closes ticket 13447.
21549 - When we fail to retrieve a hidden service descriptor, send the
21550 controller an "HS_DESC FAILED" controller event. Implements
21552 - New HiddenServiceDirGroupReadable option to cause hidden service
21553 directories and hostname files to be created group-readable. Patch
21554 from "anon", David Stainton, and "meejah". Closes ticket 11291.
21556 o Minor features (systemd):
21557 - Where supported, when running with systemd, report successful
21558 startup to systemd. Part of ticket 11016. Patch by Michael Scherer.
21559 - When running with systemd, support systemd watchdog messages. Part
21560 of ticket 11016. Patch by Michael Scherer.
21562 o Minor features (transparent proxy):
21563 - Update the transparent proxy option checks to allow for both ipfw
21564 and pf on OS X. Closes ticket 14002.
21565 - Use the correct option when using IPv6 with transparent proxy
21566 support on Linux. Resolves 13808. Patch by Francisco Blas
21569 o Minor bugfixes (preventative security, C safety):
21570 - When reading a hexadecimal, base-32, or base-64 encoded value from
21571 a string, always overwrite the whole output buffer. This prevents
21572 some bugs where we would look at (but fortunately, not reveal)
21573 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
21575 - Clear all memory targeted by tor_addr_{to,from}_sockaddr(), not
21576 just the part that's used. This makes it harder for data leak bugs
21577 to occur in the event of other programming failures. Resolves
21580 o Minor bugfixes (client, microdescriptors):
21581 - Use a full 256 bits of the SHA256 digest of a microdescriptor when
21582 computing which microdescriptors to download. This keeps us from
21583 erroneous download behavior if two microdescriptor digests ever
21584 have the same first 160 bits. Fixes part of bug 13399; bugfix
21586 - Reset a router's status if its microdescriptor digest changes,
21587 even if the first 160 bits remain the same. Fixes part of bug
21588 13399; bugfix on 0.2.3.1-alpha.
21590 o Minor bugfixes (compilation):
21591 - Silence clang warnings under --enable-expensive-hardening,
21592 including implicit truncation of 64 bit values to 32 bit, const
21593 char assignment to self, tautological compare, and additional
21594 parentheses around equality tests. Fixes bug 13577; bugfix
21596 - Fix a clang warning about checking whether an address in the
21597 middle of a structure is NULL. Fixes bug 14001; bugfix
21600 o Minor bugfixes (hidden services):
21601 - Correctly send a controller event when we find that a rendezvous
21602 circuit has finished. Fixes bug 13936; bugfix on 0.1.1.5-alpha.
21603 - Pre-check directory permissions for new hidden-services to avoid
21604 at least one case of "Bug: Acting on config options left us in a
21605 broken state. Dying." Fixes bug 13942; bugfix on 0.0.6pre1.
21606 - When adding a new hidden service (for example, via SETCONF), Tor
21607 no longer congratulates the user for running a relay. Fixes bug
21608 13941; bugfix on 0.2.6.1-alpha.
21609 - When fetching hidden service descriptors, we now check not only
21610 for whether we got the hidden service we had in mind, but also
21611 whether we got the particular descriptors we wanted. This prevents
21612 a class of inefficient but annoying DoS attacks by hidden service
21613 directories. Fixes bug 13214; bugfix on 0.2.1.6-alpha. Reported
21616 o Minor bugfixes (Linux seccomp2 sandbox):
21617 - Make transparent proxy support work along with the seccomp2
21618 sandbox. Fixes part of bug 13808; bugfix on 0.2.5.1-alpha. Patch
21619 by Francisco Blas Izquierdo Riera.
21620 - Fix a memory leak in tor-resolve when running with the sandbox
21621 enabled. Fixes bug 14050; bugfix on 0.2.5.9-rc.
21623 o Minor bugfixes (logging):
21624 - Downgrade warnings about RSA signature failures to info log level.
21625 Emit a warning when an extra info document is found incompatible
21626 with a corresponding router descriptor. Fixes bug 9812; bugfix
21628 - Make connection_ap_handshake_attach_circuit() log the circuit ID
21629 correctly. Fixes bug 13701; bugfix on 0.0.6.
21631 o Minor bugfixes (misc):
21632 - Stop allowing invalid address patterns like "*/24" that contain
21633 both a wildcard address and a bit prefix length. This affects all
21634 our address-range parsing code. Fixes bug 7484; bugfix
21637 o Minor bugfixes (testing networks, fast startup):
21638 - Allow Tor to build circuits using a consensus with no exits. If
21639 the consensus has no exits (typical of a bootstrapping test
21640 network), allow Tor to build circuits once enough descriptors have
21641 been downloaded. This assists in bootstrapping a testing Tor
21642 network. Fixes bug 13718; bugfix on 0.2.4.10-alpha. Patch
21644 - When V3AuthVotingInterval is low, give a lower If-Modified-Since
21645 header to directory servers. This allows us to obtain consensuses
21646 promptly when the consensus interval is very short. This assists
21647 in bootstrapping a testing Tor network. Fixes parts of bugs 13718
21648 and 13963; bugfix on 0.2.0.3-alpha. Patch by "teor".
21649 - Stop assuming that private addresses are local when checking
21650 reachability in a TestingTorNetwork. Instead, when testing, assume
21651 all OR connections are remote. (This is necessary due to many test
21652 scenarios running all relays on localhost.) This assists in
21653 bootstrapping a testing Tor network. Fixes bug 13924; bugfix on
21654 0.1.0.1-rc. Patch by "teor".
21655 - Avoid building exit circuits from a consensus with no exits. Now
21656 thanks to our fix for 13718, we accept a no-exit network as not
21657 wholly lost, but we need to remember not to try to build exit
21658 circuits on it. Closes ticket 13814; patch by "teor".
21659 - Stop requiring exits to have non-zero bandwithcapacity in a
21660 TestingTorNetwork. Instead, when TestingMinExitFlagThreshold is 0,
21661 ignore exit bandwidthcapacity. This assists in bootstrapping a
21662 testing Tor network. Fixes parts of bugs 13718 and 13839; bugfix
21663 on 0.2.0.3-alpha. Patch by "teor".
21664 - Add "internal" to some bootstrap statuses when no exits are
21665 available. If the consensus does not contain Exits, Tor will only
21666 build internal circuits. In this case, relevant statuses will
21667 contain the word "internal" as indicated in the Tor control-
21668 spec.txt. When bootstrap completes, Tor will be ready to build
21669 internal circuits. If a future consensus contains Exits, exit
21670 circuits may become available. Fixes part of bug 13718; bugfix on
21671 0.2.4.10-alpha. Patch by "teor".
21672 - Decrease minimum consensus interval to 10 seconds when
21673 TestingTorNetwork is set, or 5 seconds for the first consensus.
21674 Fix assumptions throughout the code that assume larger intervals.
21675 Fixes bugs 13718 and 13823; bugfix on 0.2.0.3-alpha. Patch
21677 - Avoid excluding guards from path building in minimal test
21678 networks, when we're in a test network and excluding guards would
21679 exclude all relays. This typically occurs in incredibly small tor
21680 networks, and those using "TestingAuthVoteGuard *". Fixes part of
21681 bug 13718; bugfix on 0.1.1.11-alpha. Patch by "teor".
21683 o Code simplification and refactoring:
21684 - Stop using can_complete_circuits as a global variable; access it
21685 with a function instead.
21686 - Avoid using operators directly as macro arguments: this lets us
21687 apply coccinelle transformations to our codebase more directly.
21688 Closes ticket 13172.
21689 - Combine the functions used to parse ClientTransportPlugin and
21690 ServerTransportPlugin into a single function. Closes ticket 6456.
21691 - Add inline functions and convenience macros for inspecting channel
21692 state. Refactor the code to use convenience macros instead of
21693 checking channel state directly. Fixes issue 7356.
21694 - Document all members of was_router_added_t and rename
21695 ROUTER_WAS_NOT_NEW to ROUTER_IS_ALREADY_KNOWN to make it less
21696 confusable with ROUTER_WAS_TOO_OLD. Fixes issue 13644.
21697 - In connection_exit_begin_conn(), use END_CIRC_REASON_TORPROTOCOL
21698 constant instead of hardcoded value. Fixes issue 13840.
21699 - Refactor our generic strmap and digestmap types into a single
21700 implementation, so that we can add a new digest256map
21704 - Document the bridge-authority-only 'networkstatus-bridges' file.
21705 Closes ticket 13713; patch from "tom".
21706 - Fix typo in PredictedPortsRelevanceTime option description in
21707 manpage. Resolves issue 13707.
21708 - Stop suggesting that users specify relays by nickname: it isn't a
21709 good idea. Also, properly cross-reference how to specify relays in
21710 all parts of manual documenting options that take a list of
21711 relays. Closes ticket 13381.
21712 - Clarify the HiddenServiceDir option description in manpage to make
21713 it clear that relative paths are taken with respect to the current
21714 working directory. Also clarify that this behavior is not
21715 guaranteed to remain indefinitely. Fixes issue 13913.
21718 - New tests for many parts of channel, relay, and circuitmux
21719 functionality. Code by Andrea; part of 9262.
21720 - New tests for parse_transport_line(). Part of ticket 6456.
21721 - In the unit tests, use chgrp() to change the group of the unit
21722 test temporary directory to the current user, so that the sticky
21723 bit doesn't interfere with tests that check directory groups.
21725 - Add unit tests for resolve_my_addr(). Part of ticket 12376; patch
21729 Changes in version 0.2.6.1-alpha - 2014-10-30
21730 Tor 0.2.6.1-alpha is the first release in the Tor 0.2.6.x series. It
21731 includes numerous code cleanups and new tests, and fixes a large
21732 number of annoying bugs. Out-of-memory conditions are handled better
21733 than in 0.2.5, pluggable transports have improved proxy support, and
21734 clients now use optimistic data for contacting hidden services. Also,
21735 we are now more robust to changes in what we consider a parseable
21736 directory object, so that tightening restrictions does not have a risk
21737 of introducing infinite download loops.
21739 This is the first alpha release in a new series, so expect there to be
21740 bugs. Users who would rather test out a more stable branch should stay
21741 with 0.2.5.x for now.
21743 o New compiler and system requirements:
21744 - Tor 0.2.6.x requires that your compiler support more of the C99
21745 language standard than before. The 'configure' script now detects
21746 whether your compiler supports C99 mid-block declarations and
21747 designated initializers. If it does not, Tor will not compile.
21749 We may revisit this requirement if it turns out that a significant
21750 number of people need to build Tor with compilers that don't
21751 bother implementing a 15-year-old standard. Closes ticket 13233.
21752 - Tor no longer supports systems without threading support. When we
21753 began working on Tor, there were several systems that didn't have
21754 threads, or where the thread support wasn't able to run the
21755 threads of a single process on multiple CPUs. That no longer
21756 holds: every system where Tor needs to run well now has threading
21757 support. Resolves ticket 12439.
21759 o Removed platform support:
21760 - We no longer include special code to build on Windows CE; as far
21761 as we know, nobody has used Tor on Windows CE in a very long time.
21762 Closes ticket 11446.
21764 o Major features (bridges):
21765 - Expose the outgoing upstream HTTP/SOCKS proxy to pluggable
21766 transports if they are configured via the "TOR_PT_PROXY"
21767 environment variable. Implements proposal 232. Resolves
21770 o Major features (client performance, hidden services):
21771 - Allow clients to use optimistic data when connecting to a hidden
21772 service, which should remove a round-trip from hidden service
21773 initialization. See proposal 181 for details. Implements
21776 o Major features (directory system):
21777 - Upon receiving an unparseable directory object, if its digest
21778 matches what we expected, then don't try to download it again.
21779 Previously, when we got a descriptor we didn't like, we would keep
21780 trying to download it over and over. Closes ticket 11243.
21782 o Major features (sample torrc):
21783 - Add a new, infrequently-changed "torrc.minimal". This file is
21784 similar to torrc.sample, but it will change as infrequently as
21785 possible, for the benefit of users whose systems prompt them for
21786 intervention whenever a default configuration file is changed.
21787 Making this change allows us to update torrc.sample to be a more
21788 generally useful "sample torrc".
21790 o Major bugfixes (directory authorities):
21791 - Do not assign the HSDir flag to relays if they are not Valid, or
21792 currently hibernating. Fixes 12573; bugfix on 0.2.0.10-alpha.
21794 o Major bugfixes (directory bandwidth performance):
21795 - Don't flush the zlib buffer aggressively when compressing
21796 directory information for clients. This should save about 7% of
21797 the bandwidth currently used for compressed descriptors and
21798 microdescriptors. Fixes bug 11787; bugfix on 0.1.1.23.
21800 o Minor features (security, memory wiping):
21801 - Ensure we securely wipe keys from memory after
21802 crypto_digest_get_digest and init_curve25519_keypair_from_file
21803 have finished using them. Resolves ticket 13477.
21805 o Minor features (security, out-of-memory handling):
21806 - When handling an out-of-memory condition, allocate less memory for
21807 temporary data structures. Fixes issue 10115.
21808 - When handling an out-of-memory condition, consider more types of
21809 buffers, including those on directory connections, and zlib
21810 buffers. Resolves ticket 11792.
21813 - When identity keypair is generated for first time, log a
21814 congratulatory message that links to the new relay lifecycle
21815 document. Implements feature 10427.
21817 o Minor features (client):
21818 - Clients are now willing to send optimistic data (before they
21819 receive a 'connected' cell) to relays of any version. (Relays
21820 without support for optimistic data are no longer supported on the
21821 Tor network.) Resolves ticket 13153.
21823 o Minor features (directory authorities):
21824 - Don't list relays with a bandwidth estimate of 0 in the consensus.
21825 Implements a feature proposed during discussion of bug 13000.
21826 - In tor-gencert, report an error if the user provides the same
21827 argument more than once.
21828 - If a directory authority can't find a best consensus method in the
21829 votes that it holds, it now falls back to its favorite consensus
21830 method. Previously, it fell back to method 1. Neither of these is
21831 likely to get enough signatures, but "fall back to favorite"
21832 doesn't require us to maintain support an obsolete consensus
21833 method. Implements part of proposal 215.
21835 o Minor features (logging):
21836 - On Unix-like systems, you can now use named pipes as the target of
21837 the Log option, and other options that try to append to files.
21838 Closes ticket 12061. Patch from "carlo von lynX".
21839 - When opening a log file at startup, send it every log message that
21840 we generated between startup and opening it. Previously, log
21841 messages that were generated before opening the log file were only
21842 logged to stdout. Closes ticket 6938.
21843 - Add a TruncateLogFile option to overwrite logs instead of
21844 appending to them. Closes ticket 5583.
21846 o Minor features (portability, Solaris):
21847 - Threads are no longer disabled by default on Solaris; we believe
21848 that the versions of Solaris with broken threading support are all
21849 obsolete by now. Resolves ticket 9495.
21851 o Minor features (relay):
21852 - Re-check our address after we detect a changed IP address from
21853 getsockname(). This ensures that the controller command "GETINFO
21854 address" will report the correct value. Resolves ticket 11582.
21856 - A new AccountingRule option lets Relays set whether they'd like
21857 AccountingMax to be applied separately to inbound and outbound
21858 traffic, or applied to the sum of inbound and outbound traffic.
21859 Resolves ticket 961. Patch by "chobe".
21861 o Minor features (testing networks):
21862 - Add the TestingDirAuthVoteExit option, which lists nodes to assign
21863 the "Exit" flag regardless of their uptime, bandwidth, or exit
21864 policy. TestingTorNetwork must be set for this option to have any
21865 effect. Previously, authorities would take up to 35 minutes to
21866 give nodes the Exit flag in a test network. Partially implements
21869 o Minor features (validation):
21870 - Check all date/time values passed to tor_timegm and
21871 parse_rfc1123_time for validity, taking leap years into account.
21872 Improves HTTP header validation. Implemented with bug 13476.
21873 - In correct_tm(), limit the range of values returned by system
21874 localtime(_r) and gmtime(_r) to be between the years 1 and 8099.
21875 This means we don't have to deal with negative or too large dates,
21876 even if a clock is wrong. Otherwise we might fail to read a file
21877 written by us which includes such a date. Fixes bug 13476.
21879 o Minor bugfixes (bridge clients):
21880 - When configured to use a bridge without an identity digest (not
21881 recommended), avoid launching an extra channel to it when
21882 bootstrapping. Fixes bug 7733; bugfix on 0.2.4.4-alpha.
21884 o Minor bugfixes (bridges):
21885 - When DisableNetwork is set, do not launch pluggable transport
21886 plugins, and if any are running, terminate them. Fixes bug 13213;
21887 bugfix on 0.2.3.6-alpha.
21889 o Minor bugfixes (C correctness):
21890 - Fix several instances of possible integer overflow/underflow/NaN.
21891 Fixes bug 13104; bugfix on 0.2.3.1-alpha and later. Patches
21893 - In circuit_build_times_calculate_timeout() in circuitstats.c,
21894 avoid dividing by zero in the pareto calculations. This traps
21895 under clang's "undefined-trap" sanitizer. Fixes bug 13290; bugfix
21897 - Fix an integer overflow in format_time_interval(). Fixes bug
21898 13393; bugfix on 0.2.0.10-alpha.
21899 - Set the correct day of year value when the system's localtime(_r)
21900 or gmtime(_r) functions fail to set struct tm. Not externally
21901 visible. Fixes bug 13476; bugfix on 0.0.2pre14.
21902 - Avoid unlikely signed integer overflow in tor_timegm on systems
21903 with 32-bit time_t. Fixes bug 13476; bugfix on 0.0.2pre14.
21905 o Minor bugfixes (client):
21906 - Fix smartlist_choose_node_by_bandwidth() so that relays with the
21907 BadExit flag are not considered worthy candidates. Fixes bug
21908 13066; bugfix on 0.1.2.3-alpha.
21909 - Use the consensus schedule for downloading consensuses, and not
21910 the generic schedule. Fixes bug 11679; bugfix on 0.2.2.6-alpha.
21911 - Handle unsupported or malformed SOCKS5 requests properly by
21912 responding with the appropriate error message before closing the
21913 connection. Fixes bugs 12971 and 13314; bugfix on 0.0.2pre13.
21915 o Minor bugfixes (client, torrc):
21916 - Stop modifying the value of our DirReqStatistics torrc option just
21917 because we're not a bridge or relay. This bug was causing Tor
21918 Browser users to write "DirReqStatistics 0" in their torrc files
21919 as if they had chosen to change the config. Fixes bug 4244; bugfix
21921 - When GeoIPExcludeUnknown is enabled, do not incorrectly decide
21922 that our options have changed every time we SIGHUP. Fixes bug
21923 9801; bugfix on 0.2.4.10-alpha. Patch from "qwerty1".
21925 o Minor bugfixes (controller):
21926 - Return an error when the second or later arguments of the
21927 "setevents" controller command are invalid events. Previously we
21928 would return success while silently skipping invalid events. Fixes
21929 bug 13205; bugfix on 0.2.3.2-alpha. Reported by "fpxnns".
21931 o Minor bugfixes (directory system):
21932 - Always believe that v3 directory authorities serve extra-info
21933 documents, whether they advertise "caches-extra-info" or not.
21934 Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
21935 - When running as a v3 directory authority, advertise that you serve
21936 extra-info documents so that clients who want them can find them
21937 from you too. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
21938 - Check the BRIDGE_DIRINFO flag bitwise rather than using equality.
21939 Previously, directories offering BRIDGE_DIRINFO and some other
21940 flag (i.e. microdescriptors or extrainfo) would be ignored when
21941 looking for bridges. Partially fixes bug 13163; bugfix
21944 o Minor bugfixes (networking):
21945 - Check for orconns and use connection_or_close_for_error() rather
21946 than connection_mark_for_close() directly in the getsockopt()
21947 failure case of connection_handle_write_impl(). Fixes bug 11302;
21948 bugfix on 0.2.4.4-alpha.
21950 o Minor bugfixes (relay):
21951 - When generating our family list, remove spaces from around the
21952 entries. Fixes bug 12728; bugfix on 0.2.1.7-alpha.
21953 - If our previous bandwidth estimate was 0 bytes, allow publishing a
21954 new relay descriptor immediately. Fixes bug 13000; bugfix
21957 o Minor bugfixes (testing networks):
21958 - Fix TestingDirAuthVoteGuard to properly give out Guard flags in a
21959 testing network. Fixes bug 13064; bugfix on 0.2.5.2-alpha.
21960 - Stop using the default authorities in networks which provide both
21961 AlternateDirAuthority and AlternateBridgeAuthority. Partially
21962 fixes bug 13163; bugfix on 0.2.0.13-alpha.
21964 o Minor bugfixes (testing):
21965 - Stop spawn test failures due to a race condition between the
21966 SIGCHLD handler updating the process status, and the test reading
21967 it. Fixes bug 13291; bugfix on 0.2.3.3-alpha.
21969 o Minor bugfixes (testing, Windows):
21970 - Avoid passing an extra backslash when creating a temporary
21971 directory for running the unit tests on Windows. Fixes bug 12392;
21972 bugfix on 0.2.2.25-alpha. Patch from Gisle Vanem.
21974 o Minor bugfixes (windows):
21975 - Remove code to special-case handling of NTE_BAD_KEYSET when
21976 acquiring windows CryptoAPI context. This error can't actually
21977 occur for the parameters we're providing. Fixes bug 10816; bugfix
21980 o Minor bugfixes (zlib):
21981 - Avoid truncating a zlib stream when trying to finalize it with an
21982 empty output buffer. Fixes bug 11824; bugfix on 0.1.1.23.
21985 - Allow our configure script to build correctly with autoconf 2.62
21986 again. Fixes bug 12693; bugfix on 0.2.5.2-alpha.
21987 - Improve the error message from ./configure to make it clear that
21988 when asciidoc has not been found, the user will have to either add
21989 --disable-asciidoc argument or install asciidoc. Resolves
21992 o Code simplification and refactoring:
21993 - Change the entry_is_live() function to take named bitfield
21994 elements instead of an unnamed list of booleans. Closes
21996 - Refactor and unit-test entry_is_time_to_retry() in entrynodes.c.
21997 Resolves ticket 12205.
21998 - Use calloc and reallocarray functions instead of multiply-
21999 then-malloc. This makes it less likely for us to fall victim to an
22000 integer overflow attack when allocating. Resolves ticket 12855.
22001 - Use the standard macro name SIZE_MAX, instead of our
22003 - Document usage of the NO_DIRINFO and ALL_DIRINFO flags clearly in
22004 functions which take them as arguments. Replace 0 with NO_DIRINFO
22005 in a function call for clarity. Seeks to prevent future issues
22007 - Avoid 4 null pointer errors under clang static analysis by using
22008 tor_assert() to prove that the pointers aren't null. Fixes
22010 - Rework the API of policies_parse_exit_policy() to use a bitmask to
22011 represent parsing options, instead of a confusing mess of
22012 booleans. Resolves ticket 8197.
22013 - Introduce a helper function to parse ExitPolicy in
22014 or_options_t structure.
22017 - Add a doc/TUNING document with tips for handling large numbers of
22018 TCP connections when running busy Tor relay. Update the warning
22019 message to point to this file when running out of sockets
22020 operating system is allowing to use simultaneously. Resolves
22023 o Removed features:
22024 - We no longer remind the user about configuration options that have
22025 been obsolete since 0.2.3.x or earlier. Patch by Adrien Bak.
22026 - Remove our old, non-weighted bandwidth-based node selection code.
22027 Previously, we used it as a fallback when we couldn't perform
22028 weighted bandwidth-based node selection. But that would only
22029 happen in the cases where we had no consensus, or when we had a
22030 consensus generated by buggy or ancient directory authorities. In
22031 either case, it's better to use the more modern, better maintained
22032 algorithm, with reasonable defaults for the weights. Closes
22034 - Remove the --disable-curve25519 configure option. Relays and
22035 clients now are required to support curve25519 and the
22037 - The old "StrictEntryNodes" and "StrictExitNodes" options, which
22038 used to be deprecated synonyms for "StrictNodes", are now marked
22039 obsolete. Resolves ticket 12226.
22040 - Clients don't understand the BadDirectory flag in the consensus
22041 anymore, and ignore it.
22044 - Refactor the function that chooses guard nodes so that it can more
22045 easily be tested; write some tests for it.
22046 - Fix and re-enable the fgets_eagain unit test. Fixes bug 12503;
22047 bugfix on 0.2.3.1-alpha. Patch from "cypherpunks."
22048 - Create unit tests for format_time_interval(). With bug 13393.
22049 - Add unit tests for tor_timegm signed overflow, tor_timegm and
22050 parse_rfc1123_time validity checks, correct_tm year clamping. Unit
22051 tests (visible) fixes in bug 13476.
22052 - Add a "coverage-html" make target to generate HTML-visualized
22053 coverage results when building with --enable-coverage. (Requires
22054 lcov.) Patch from Kevin Murray.
22055 - Enable the backtrace handler (where supported) when running the
22057 - Revise all unit tests that used the legacy test_* macros to
22058 instead use the recommended tt_* macros. This patch was generated
22059 with coccinelle, to avoid manual errors. Closes ticket 13119.
22061 o Distribution (systemd):
22062 - systemd unit file: only allow tor to write to /var/lib/tor and
22063 /var/log/tor. The rest of the filesystem is accessible for reading
22064 only. Patch by intrigeri; resolves ticket 12751.
22065 - systemd unit file: ensure that the process and all its children
22066 can never gain new privileges. Patch by intrigeri; resolves
22068 - systemd unit file: set up /var/run/tor as writable for the Tor
22069 service. Patch by intrigeri; resolves ticket 13196.
22071 o Removed features (directory authorities):
22072 - Remove code that prevented authorities from listing Tor relays
22073 affected by CVE-2011-2769 as guards. These relays are already
22074 rejected altogether due to the minimum version requirement of
22075 0.2.3.16-alpha. Closes ticket 13152.
22076 - The "AuthDirRejectUnlisted" option no longer has any effect, as
22077 the fingerprints file (approved-routers) has been deprecated.
22078 - Directory authorities do not support being Naming dirauths anymore.
22079 The "NamingAuthoritativeDir" config option is now obsolete.
22080 - Directory authorities do not support giving out the BadDirectory
22082 - Directory authorities no longer advertise or support consensus
22083 methods 1 through 12 inclusive. These consensus methods were
22084 obsolete and/or insecure: maintaining the ability to support them
22085 served no good purpose. Implements part of proposal 215; closes
22088 o Testing (test-network.sh):
22089 - Stop using "echo -n", as some shells' built-in echo doesn't
22090 support "-n". Instead, use "/bin/echo -n". Partially fixes
22092 - Stop an apparent test-network hang when used with make -j2. Fixes
22094 - Add a --delay option to test-network.sh, which configures the
22095 delay before the chutney network tests for data transmission.
22096 Partially implements ticket 13161.
22099 Changes in version 0.2.5.10 - 2014-10-24
22100 Tor 0.2.5.10 is the first stable release in the 0.2.5 series.
22102 It adds several new security features, including improved
22103 denial-of-service resistance for relays, new compiler hardening
22104 options, and a system-call sandbox for hardened installations on Linux
22105 (requires seccomp2). The controller protocol has several new features,
22106 resolving IPv6 addresses should work better than before, and relays
22107 should be a little more CPU-efficient. We've added support for more
22108 OpenBSD and FreeBSD transparent proxy types. We've improved the build
22109 system and testing infrastructure to allow unit testing of more parts
22110 of the Tor codebase. Finally, we've addressed several nagging pluggable
22111 transport usability issues, and included numerous other small bugfixes
22112 and features mentioned below.
22114 This release marks end-of-life for Tor 0.2.3.x; those Tor versions
22115 have accumulated many known flaws; everyone should upgrade.
22117 o Deprecated versions:
22118 - Tor 0.2.3.x has reached end-of-life; it has received no patches or
22119 attention for some while.
22122 Changes in version 0.2.5.9-rc - 2014-10-20
22123 Tor 0.2.5.9-rc is the third release candidate for the Tor 0.2.5.x
22124 series. It disables SSL3 in response to the recent "POODLE" attack
22125 (even though POODLE does not affect Tor). It also works around a crash
22126 bug caused by some operating systems' response to the "POODLE" attack
22127 (which does affect Tor). It also contains a few miscellaneous fixes.
22129 o Major security fixes:
22130 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
22131 today support TLS 1.0 or later, so we can safely turn off support
22132 for this old (and insecure) protocol. Fixes bug 13426.
22134 o Major bugfixes (openssl bug workaround):
22135 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
22136 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
22137 13471. This is a workaround for an OpenSSL bug.
22140 - Disable the sandbox name resolver cache when running tor-resolve:
22141 tor-resolve doesn't use the sandbox code, and turning it on was
22142 breaking attempts to do tor-resolve on a non-default server on
22143 Linux. Fixes bug 13295; bugfix on 0.2.5.3-alpha.
22145 o Compilation fixes:
22146 - Build and run correctly on systems like OpenBSD-current that have
22147 patched OpenSSL to remove get_cipher_by_char and/or its
22148 implementations. Fixes issue 13325.
22150 o Downgraded warnings:
22151 - Downgrade the severity of the 'unexpected sendme cell from client'
22152 from 'warn' to 'protocol warning'. Closes ticket 8093.
22155 Changes in version 0.2.4.25 - 2014-10-20
22156 Tor 0.2.4.25 disables SSL3 in response to the recent "POODLE" attack
22157 (even though POODLE does not affect Tor). It also works around a crash
22158 bug caused by some operating systems' response to the "POODLE" attack
22159 (which does affect Tor).
22161 o Major security fixes (also in 0.2.5.9-rc):
22162 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
22163 today support TLS 1.0 or later, so we can safely turn off support
22164 for this old (and insecure) protocol. Fixes bug 13426.
22166 o Major bugfixes (openssl bug workaround, also in 0.2.5.9-rc):
22167 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
22168 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
22169 13471. This is a workaround for an OpenSSL bug.
22172 Changes in version 0.2.5.8-rc - 2014-09-22
22173 Tor 0.2.5.8-rc is the second release candidate for the Tor 0.2.5.x
22174 series. It fixes a bug that affects consistency and speed when
22175 connecting to hidden services, and it updates the location of one of
22176 the directory authorities.
22179 - Clients now send the correct address for their chosen rendezvous
22180 point when trying to access a hidden service. They used to send
22181 the wrong address, which would still work some of the time because
22182 they also sent the identity digest of the rendezvous point, and if
22183 the hidden service happened to try connecting to the rendezvous
22184 point from a relay that already had a connection open to it,
22185 the relay would reuse that connection. Now connections to hidden
22186 services should be more robust and faster. Also, this bug meant
22187 that clients were leaking to the hidden service whether they were
22188 on a little-endian (common) or big-endian (rare) system, which for
22189 some users might have reduced their anonymity. Fixes bug 13151;
22190 bugfix on 0.2.1.5-alpha.
22192 o Directory authority changes:
22193 - Change IP address for gabelmoo (v3 directory authority).
22196 Changes in version 0.2.4.24 - 2014-09-22
22197 Tor 0.2.4.24 fixes a bug that affects consistency and speed when
22198 connecting to hidden services, and it updates the location of one of
22199 the directory authorities.
22202 - Clients now send the correct address for their chosen rendezvous
22203 point when trying to access a hidden service. They used to send
22204 the wrong address, which would still work some of the time because
22205 they also sent the identity digest of the rendezvous point, and if
22206 the hidden service happened to try connecting to the rendezvous
22207 point from a relay that already had a connection open to it,
22208 the relay would reuse that connection. Now connections to hidden
22209 services should be more robust and faster. Also, this bug meant
22210 that clients were leaking to the hidden service whether they were
22211 on a little-endian (common) or big-endian (rare) system, which for
22212 some users might have reduced their anonymity. Fixes bug 13151;
22213 bugfix on 0.2.1.5-alpha.
22215 o Directory authority changes:
22216 - Change IP address for gabelmoo (v3 directory authority).
22218 o Minor features (geoip):
22219 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
22223 Changes in version 0.2.5.7-rc - 2014-09-11
22224 Tor 0.2.5.7-rc fixes several regressions from earlier in the 0.2.5.x
22225 release series, and some long-standing bugs related to ORPort reachability
22226 testing and failure to send CREATE cells. It is the first release
22227 candidate for the Tor 0.2.5.x series.
22229 o Major bugfixes (client, startup):
22230 - Start making circuits as soon as DisabledNetwork is turned off.
22231 When Tor started with DisabledNetwork set, it would correctly
22232 conclude that it shouldn't build circuits, but it would mistakenly
22233 cache this conclusion, and continue believing it even when
22234 DisableNetwork is set to 0. Fixes the bug introduced by the fix
22235 for bug 11200; bugfix on 0.2.5.4-alpha.
22236 - Resume expanding abbreviations for command-line options. The fix
22237 for bug 4647 accidentally removed our hack from bug 586 that
22238 rewrote HashedControlPassword to __HashedControlSessionPassword
22239 when it appears on the commandline (which allowed the user to set
22240 her own HashedControlPassword in the torrc file while the
22241 controller generates a fresh session password for each run). Fixes
22242 bug 12948; bugfix on 0.2.5.1-alpha.
22243 - Warn about attempts to run hidden services and relays in the same
22244 process: that's probably not a good idea. Closes ticket 12908.
22246 o Major bugfixes (relay):
22247 - Avoid queuing or sending destroy cells for circuit ID zero when we
22248 fail to send a CREATE cell. Fixes bug 12848; bugfix on 0.0.8pre1.
22249 Found and fixed by "cypherpunks".
22250 - Fix ORPort reachability detection on relays running behind a
22251 proxy, by correctly updating the "local" mark on the controlling
22252 channel when changing the address of an or_connection_t after the
22253 handshake. Fixes bug 12160; bugfix on 0.2.4.4-alpha.
22255 o Minor features (bridge):
22256 - Add an ExtORPortCookieAuthFileGroupReadable option to make the
22257 cookie file for the ExtORPort g+r by default.
22259 o Minor features (geoip):
22260 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
22263 o Minor bugfixes (logging):
22264 - Reduce the log severity of the "Pluggable transport proxy does not
22265 provide any needed transports and will not be launched." message,
22266 since Tor Browser includes several ClientTransportPlugin lines in
22267 its torrc-defaults file, leading every Tor Browser user who looks
22268 at her logs to see these notices and wonder if they're dangerous.
22269 Resolves bug 13124; bugfix on 0.2.5.3-alpha.
22270 - Downgrade "Unexpected onionskin length after decryption" warning
22271 to a protocol-warn, since there's nothing relay operators can do
22272 about a client that sends them a malformed create cell. Resolves
22273 bug 12996; bugfix on 0.0.6rc1.
22274 - Log more specific warnings when we get an ESTABLISH_RENDEZVOUS
22275 cell on a cannibalized or non-OR circuit. Resolves ticket 12997.
22276 - When logging information about an EXTEND2 or EXTENDED2 cell, log
22277 their names correctly. Fixes part of bug 12700; bugfix
22279 - When logging information about a relay cell whose command we don't
22280 recognize, log its command as an integer. Fixes part of bug 12700;
22281 bugfix on 0.2.1.10-alpha.
22282 - Escape all strings from the directory connection before logging
22283 them. Fixes bug 13071; bugfix on 0.1.1.15. Patch from "teor".
22285 o Minor bugfixes (controller):
22286 - Restore the functionality of CookieAuthFileGroupReadable. Fixes
22287 bug 12864; bugfix on 0.2.5.1-alpha.
22288 - Actually send TRANSPORT_LAUNCHED and HS_DESC events to
22289 controllers. Fixes bug 13085; bugfix on 0.2.5.1-alpha. Patch
22292 o Minor bugfixes (compilation):
22293 - Fix compilation of test.h with MSVC. Patch from Gisle Vanem;
22294 bugfix on 0.2.5.5-alpha.
22295 - Make the nmake make files work again. Fixes bug 13081. Bugfix on
22296 0.2.5.1-alpha. Patch from "NewEraCracker".
22297 - In routerlist_assert_ok(), don't take the address of a
22298 routerinfo's cache_info member unless that routerinfo is non-NULL.
22299 Fixes bug 13096; bugfix on 0.1.1.9-alpha. Patch by "teor".
22300 - Fix a large number of false positive warnings from the clang
22301 analyzer static analysis tool. This should make real warnings
22302 easier for clang analyzer to find. Patch from "teor". Closes
22305 o Distribution (systemd):
22306 - Verify configuration file via ExecStartPre in the systemd unit
22307 file. Patch from intrigeri; resolves ticket 12730.
22308 - Explicitly disable RunAsDaemon in the systemd unit file. Our
22309 current systemd unit uses "Type = simple", so systemd does not
22310 expect tor to fork. If the user has "RunAsDaemon 1" in their
22311 torrc, then things won't work as expected. This is e.g. the case
22312 on Debian (and derivatives), since there we pass "--defaults-torrc
22313 /usr/share/tor/tor-service-defaults-torrc" (that contains
22314 "RunAsDaemon 1") by default. Patch by intrigeri; resolves
22318 - Adjust the URLs in the README to refer to the new locations of
22319 several documents on the website. Fixes bug 12830. Patch from
22321 - Document 'reject6' and 'accept6' ExitPolicy entries. Resolves
22325 Changes in version 0.2.5.6-alpha - 2014-07-28
22326 Tor 0.2.5.6-alpha brings us a big step closer to slowing down the
22327 risk from guard rotation, and fixes a variety of other issues to get
22328 us closer to a release candidate.
22330 o Major features (also in 0.2.4.23):
22331 - Make the number of entry guards configurable via a new
22332 NumEntryGuards consensus parameter, and the number of directory
22333 guards configurable via a new NumDirectoryGuards consensus
22334 parameter. Implements ticket 12688.
22336 o Major bugfixes (also in 0.2.4.23):
22337 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
22338 implementation that caused incorrect results on 32-bit
22339 implementations when certain malformed inputs were used along with
22340 a small class of private ntor keys. This bug does not currently
22341 appear to allow an attacker to learn private keys or impersonate a
22342 Tor server, but it could provide a means to distinguish 32-bit Tor
22343 implementations from 64-bit Tor implementations. Fixes bug 12694;
22344 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
22348 - Perform circuit cleanup operations even when circuit
22349 construction operations are disabled (because the network is
22350 disabled, or because there isn't enough directory information).
22351 Previously, when we were not building predictive circuits, we
22352 were not closing expired circuits either. Fixes bug 8387; bugfix on
22353 0.1.1.11-alpha. This bug became visible in 0.2.4.10-alpha when we
22354 became more strict about when we have "enough directory information
22355 to build circuits".
22358 - Authorities now assign the Guard flag to the fastest 25% of the
22359 network (it used to be the fastest 50%). Also raise the consensus
22360 weight that guarantees the Guard flag from 250 to 2000. For the
22361 current network, this results in about 1100 guards, down from 2500.
22362 This step paves the way for moving the number of entry guards
22363 down to 1 (proposal 236) while still providing reasonable expected
22364 performance for most users. Implements ticket 12690.
22365 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
22367 - Slightly enhance the diagnostic message for bug 12184.
22369 o Minor bugfixes (also in 0.2.4.23):
22370 - Warn and drop the circuit if we receive an inbound 'relay early'
22371 cell. Those used to be normal to receive on hidden service circuits
22372 due to bug 1038, but the buggy Tor versions are long gone from
22373 the network so we can afford to resume watching for them. Resolves
22374 the rest of bug 1038; bugfix on 0.2.1.19.
22375 - Correct a confusing error message when trying to extend a circuit
22376 via the control protocol but we don't know a descriptor or
22377 microdescriptor for one of the specified relays. Fixes bug 12718;
22378 bugfix on 0.2.3.1-alpha.
22381 - Fix compilation when building with bufferevents enabled. (This
22382 configuration is still not expected to work, however.)
22383 Fixes bugs 12438, 12474, 11578; bugfixes on 0.2.5.1-alpha and
22384 0.2.5.3-alpha. Patches from Anthony G. Basile and Sathyanarayanan
22386 - Compile correctly with builds and forks of OpenSSL (such as
22387 LibreSSL) that disable compression. Fixes bug 12602; bugfix on
22388 0.2.1.1-alpha. Patch from "dhill".
22391 Changes in version 0.2.4.23 - 2014-07-28
22392 Tor 0.2.4.23 brings us a big step closer to slowing down the risk from
22393 guard rotation, and also backports several important fixes from the
22394 Tor 0.2.5 alpha release series.
22397 - Clients now look at the "usecreatefast" consensus parameter to
22398 decide whether to use CREATE_FAST or CREATE cells for the first hop
22399 of their circuit. This approach can improve security on connections
22400 where Tor's circuit handshake is stronger than the available TLS
22401 connection security levels, but the tradeoff is more computational
22402 load on guard relays. Implements proposal 221. Resolves ticket 9386.
22403 - Make the number of entry guards configurable via a new
22404 NumEntryGuards consensus parameter, and the number of directory
22405 guards configurable via a new NumDirectoryGuards consensus
22406 parameter. Implements ticket 12688.
22409 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
22410 implementation that caused incorrect results on 32-bit
22411 implementations when certain malformed inputs were used along with
22412 a small class of private ntor keys. This bug does not currently
22413 appear to allow an attacker to learn private keys or impersonate a
22414 Tor server, but it could provide a means to distinguish 32-bit Tor
22415 implementations from 64-bit Tor implementations. Fixes bug 12694;
22416 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
22420 - Warn and drop the circuit if we receive an inbound 'relay early'
22421 cell. Those used to be normal to receive on hidden service circuits
22422 due to bug 1038, but the buggy Tor versions are long gone from
22423 the network so we can afford to resume watching for them. Resolves
22424 the rest of bug 1038; bugfix on 0.2.1.19.
22425 - Correct a confusing error message when trying to extend a circuit
22426 via the control protocol but we don't know a descriptor or
22427 microdescriptor for one of the specified relays. Fixes bug 12718;
22428 bugfix on 0.2.3.1-alpha.
22429 - Avoid an illegal read from stack when initializing the TLS
22430 module using a version of OpenSSL without all of the ciphers
22431 used by the v2 link handshake. Fixes bug 12227; bugfix on
22432 0.2.4.8-alpha. Found by "starlight".
22435 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
22439 Changes in version 0.2.5.5-alpha - 2014-06-18
22440 Tor 0.2.5.5-alpha fixes a wide variety of remaining issues in the Tor
22441 0.2.5.x release series, including a couple of DoS issues, some
22442 performance regressions, a large number of bugs affecting the Linux
22443 seccomp2 sandbox code, and various other bugfixes. It also adds
22444 diagnostic bugfixes for a few tricky issues that we're trying to
22447 o Major features (security, traffic analysis resistance):
22448 - Several major improvements to the algorithm used to decide when to
22449 close TLS connections. Previous versions of Tor closed connections
22450 at a fixed interval after the last time a non-padding cell was
22451 sent over the connection, regardless of the target of the
22452 connection. Now, we randomize the intervals by adding up to 50% of
22453 their base value, we measure the length of time since connection
22454 last had at least one circuit, and we allow connections to known
22455 ORs to remain open a little longer (15 minutes instead of 3
22456 minutes minimum). These changes should improve Tor's resistance
22457 against some kinds of traffic analysis, and lower some overhead
22458 from needlessly closed connections. Fixes ticket 6799.
22459 Incidentally fixes ticket 12023; bugfix on 0.2.5.1-alpha.
22461 o Major bugfixes (security, OOM, new since 0.2.5.4-alpha, also in 0.2.4.22):
22462 - Fix a memory leak that could occur if a microdescriptor parse
22463 fails during the tokenizing step. This bug could enable a memory
22464 exhaustion attack by directory servers. Fixes bug 11649; bugfix
22467 o Major bugfixes (security, directory authorities):
22468 - Directory authorities now include a digest of each relay's
22469 identity key as a part of its microdescriptor.
22471 This is a workaround for bug 11743 (reported by "cypherpunks"),
22472 where Tor clients do not support receiving multiple
22473 microdescriptors with the same SHA256 digest in the same
22474 consensus. When clients receive a consensus like this, they only
22475 use one of the relays. Without this fix, a hostile relay could
22476 selectively disable some client use of target relays by
22477 constructing a router descriptor with a different identity and the
22478 same microdescriptor parameters and getting the authorities to
22479 list it in a microdescriptor consensus. This fix prevents an
22480 attacker from causing a microdescriptor collision, because the
22481 router's identity is not forgeable.
22483 o Major bugfixes (relay):
22484 - Use a direct dirport connection when uploading non-anonymous
22485 descriptors to the directory authorities. Previously, relays would
22486 incorrectly use tunnel connections under a fairly wide variety of
22487 circumstances. Fixes bug 11469; bugfix on 0.2.4.3-alpha.
22488 - When a circuit accidentally has the same circuit ID for its
22489 forward and reverse direction, correctly detect the direction of
22490 cells using that circuit. Previously, this bug made roughly one
22491 circuit in a million non-functional. Fixes bug 12195; this is a
22492 bugfix on every version of Tor.
22494 o Major bugfixes (client, pluggable transports):
22495 - When managing pluggable transports, use OS notification facilities
22496 to learn if they have crashed, and don't attempt to kill any
22497 process that has already exited. Fixes bug 8746; bugfix
22500 o Minor features (diagnostic):
22501 - When logging a warning because of bug 7164, additionally check the
22502 hash table for consistency (as proposed on ticket 11737). This may
22503 help diagnose bug 7164.
22504 - When we log a heartbeat, log how many one-hop circuits we have
22505 that are at least 30 minutes old, and log status information about
22506 a few of them. This is an attempt to track down bug 8387.
22507 - When encountering an unexpected CR while writing text to a file on
22508 Windows, log the name of the file. Should help diagnosing
22510 - Give more specific warnings when a client notices that an onion
22511 handshake has failed. Fixes ticket 9635.
22512 - Add significant new logging code to attempt to diagnose bug 12184,
22513 where relays seem to run out of available circuit IDs.
22514 - Improve the diagnostic log message for bug 8387 even further to
22515 try to improve our odds of figuring out why one-hop directory
22516 circuits sometimes do not get closed.
22518 o Minor features (security, memory management):
22519 - Memory allocation tricks (mempools and buffer freelists) are now
22520 disabled by default. You can turn them back on with
22521 --enable-mempools and --enable-buf-freelists respectively. We're
22522 disabling these features because malloc performance is good enough
22523 on most platforms, and a similar feature in OpenSSL exacerbated
22524 exploitation of the Heartbleed attack. Resolves ticket 11476.
22526 o Minor features (security):
22527 - Apply the secure SipHash-2-4 function to the hash table mapping
22528 circuit IDs and channels to circuits. We missed this one when we
22529 were converting all the other hash functions to use SipHash back
22530 in 0.2.5.3-alpha. Resolves ticket 11750.
22532 o Minor features (build):
22533 - The configure script has a --disable-seccomp option to turn off
22534 support for libseccomp on systems that have it, in case it (or
22535 Tor's use of it) is broken. Resolves ticket 11628.
22537 o Minor features (other):
22538 - Update geoip and geoip6 to the June 4 2014 Maxmind GeoLite2
22541 o Minor bugfixes (security, new since 0.2.5.4-alpha, also in 0.2.4.22):
22542 - When running a hidden service, do not allow TunneledDirConns 0;
22543 this will keep the hidden service from running, and also
22544 make it publish its descriptors directly over HTTP. Fixes bug 10849;
22545 bugfix on 0.2.1.1-alpha.
22547 o Minor bugfixes (performance):
22548 - Avoid a bug where every successful connection made us recompute
22549 the flag telling us whether we have sufficient information to
22550 build circuits. Previously, we would forget our cached value
22551 whenever we successfully opened a channel (or marked a router as
22552 running or not running for any other reason), regardless of
22553 whether we had previously believed the router to be running. This
22554 forced us to run an expensive update operation far too often.
22555 Fixes bug 12170; bugfix on 0.1.2.1-alpha.
22556 - Avoid using tor_memeq() for checking relay cell integrity. This
22557 removes a possible performance bottleneck. Fixes part of bug
22558 12169; bugfix on 0.2.1.31.
22560 o Minor bugfixes (compilation):
22561 - Fix compilation of test_status.c when building with MVSC. Bugfix
22562 on 0.2.5.4-alpha. Patch from Gisle Vanem.
22563 - Resolve GCC complaints on OpenBSD about discarding constness in
22564 TO_{ORIGIN,OR}_CIRCUIT functions. Fixes part of bug 11633; bugfix
22565 on 0.1.1.23. Patch from Dana Koch.
22566 - Resolve clang complaints on OpenBSD with -Wshorten-64-to-32 due to
22567 treatment of long and time_t as comparable types. Fixes part of
22568 bug 11633. Patch from Dana Koch.
22569 - Make Tor compile correctly with --disable-buf-freelists. Fixes bug
22570 11623; bugfix on 0.2.5.3-alpha.
22571 - When deciding whether to build the 64-bit curve25519
22572 implementation, detect platforms where we can compile 128-bit
22573 arithmetic but cannot link it. Fixes bug 11729; bugfix on
22574 0.2.4.8-alpha. Patch from "conradev".
22575 - Fix compilation when DNS_CACHE_DEBUG is enabled. Fixes bug 11761;
22576 bugfix on 0.2.3.13-alpha. Found by "cypherpunks".
22577 - Fix compilation with dmalloc. Fixes bug 11605; bugfix
22580 o Minor bugfixes (Directory server):
22581 - When sending a compressed set of descriptors or microdescriptors,
22582 make sure to finalize the zlib stream. Previously, we would write
22583 all the compressed data, but if the last descriptor we wanted to
22584 send was missing or too old, we would not mark the stream as
22585 finished. This caused problems for decompression tools. Fixes bug
22586 11648; bugfix on 0.1.1.23.
22588 o Minor bugfixes (Linux seccomp sandbox):
22589 - Make the seccomp sandbox code compile under ARM Linux. Fixes bug
22590 11622; bugfix on 0.2.5.1-alpha.
22591 - Avoid crashing when re-opening listener ports with the seccomp
22592 sandbox active. Fixes bug 12115; bugfix on 0.2.5.1-alpha.
22593 - Avoid crashing with the seccomp sandbox enabled along with
22594 ConstrainedSockets. Fixes bug 12139; bugfix on 0.2.5.1-alpha.
22595 - When we receive a SIGHUP with the sandbox enabled, correctly
22596 support rotating our log files. Fixes bug 12032; bugfix
22598 - Avoid crash when running with sandboxing enabled and
22599 DirReqStatistics not disabled. Fixes bug 12035; bugfix
22601 - Fix a "BUG" warning when trying to write bridge-stats files with
22602 the Linux syscall sandbox filter enabled. Fixes bug 12041; bugfix
22604 - Prevent the sandbox from crashing on startup when run with the
22605 --enable-expensive-hardening configuration option. Fixes bug
22606 11477; bugfix on 0.2.5.4-alpha.
22607 - When running with DirPortFrontPage and sandboxing both enabled,
22608 reload the DirPortFrontPage correctly when restarting. Fixes bug
22609 12028; bugfix on 0.2.5.1-alpha.
22610 - Don't try to enable the sandbox when using the Tor binary to check
22611 its configuration, hash a passphrase, or so on. Doing so was
22612 crashing on startup for some users. Fixes bug 11609; bugfix
22614 - Avoid warnings when running with sandboxing and node statistics
22615 enabled at the same time. Fixes part of 12064; bugfix on
22616 0.2.5.1-alpha. Patch from Michael Wolf.
22617 - Avoid warnings when running with sandboxing enabled at the same
22618 time as cookie authentication, hidden services, or directory
22619 authority voting. Fixes part of 12064; bugfix on 0.2.5.1-alpha.
22620 - Do not allow options that require calls to exec to be enabled
22621 alongside the seccomp2 sandbox: they will inevitably crash. Fixes
22622 bug 12043; bugfix on 0.2.5.1-alpha.
22623 - Handle failures in getpwnam()/getpwuid() when running with the
22624 User option set and the Linux syscall sandbox enabled. Fixes bug
22625 11946; bugfix on 0.2.5.1-alpha.
22626 - Refactor the getaddrinfo workaround that the seccomp sandbox uses
22627 to avoid calling getaddrinfo() after installing the sandbox
22628 filters. Previously, it preloaded a cache with the IPv4 address
22629 for our hostname, and nothing else. Now, it loads the cache with
22630 every address that it used to initialize the Tor process. Fixes
22631 bug 11970; bugfix on 0.2.5.1-alpha.
22633 o Minor bugfixes (pluggable transports):
22634 - Enable the ExtORPortCookieAuthFile option, to allow changing the
22635 default location of the authentication token for the extended OR
22636 Port as used by sever-side pluggable transports. We had
22637 implemented this option before, but the code to make it settable
22638 had been omitted. Fixes bug 11635; bugfix on 0.2.5.1-alpha.
22639 - Avoid another 60-second delay when starting Tor in a pluggable-
22640 transport-using configuration when we already have cached
22641 descriptors for our bridges. Fixes bug 11965; bugfix
22644 o Minor bugfixes (client):
22645 - Avoid "Tried to open a socket with DisableNetwork set" warnings
22646 when starting a client with bridges configured and DisableNetwork
22647 set. (Tor launcher starts Tor with DisableNetwork set the first
22648 time it runs.) Fixes bug 10405; bugfix on 0.2.3.9-alpha.
22650 o Minor bugfixes (testing):
22651 - The Python parts of the test scripts now work on Python 3 as well
22652 as Python 2, so systems where '/usr/bin/python' is Python 3 will
22653 no longer have the tests break. Fixes bug 11608; bugfix
22655 - When looking for versions of python that we could run the tests
22656 with, check for "python2.7" and "python3.3"; previously we were
22657 only looking for "python", "python2", and "python3". Patch from
22658 Dana Koch. Fixes bug 11632; bugfix on 0.2.5.2-alpha.
22659 - Fix all valgrind warnings produced by the unit tests. There were
22660 over a thousand memory leak warnings previously, mostly produced
22661 by forgetting to free things in the unit test code. Fixes bug
22662 11618, bugfixes on many versions of Tor.
22664 o Minor bugfixes (tor-fw-helper):
22665 - Give a correct log message when tor-fw-helper fails to launch.
22666 (Previously, we would say something like "tor-fw-helper sent us a
22667 string we could not parse".) Fixes bug 9781; bugfix
22670 o Minor bugfixes (relay, threading):
22671 - Check return code on spawn_func() in cpuworker code, so that we
22672 don't think we've spawned a nonworking cpuworker and write junk to
22673 it forever. Fix related to bug 4345; bugfix on all released Tor
22674 versions. Found by "skruffy".
22675 - Use a pthread_attr to make sure that spawn_func() cannot return an
22676 error while at the same time launching a thread. Fix related to
22677 bug 4345; bugfix on all released Tor versions. Reported
22680 o Minor bugfixes (relay, oom prevention):
22681 - Correctly detect the total available system memory. We tried to do
22682 this in 0.2.5.4-alpha, but the code was set up to always return an
22683 error value, even on success. Fixes bug 11805; bugfix
22686 o Minor bugfixes (relay, other):
22687 - We now drop CREATE cells for already-existent circuit IDs and for
22688 zero-valued circuit IDs, regardless of other factors that might
22689 otherwise have called for DESTROY cells. Fixes bug 12191; bugfix
22691 - Avoid an illegal read from stack when initializing the TLS module
22692 using a version of OpenSSL without all of the ciphers used by the
22693 v2 link handshake. Fixes bug 12227; bugfix on 0.2.4.8-alpha. Found
22695 - When rejecting DATA cells for stream_id zero, still count them
22696 against the circuit's deliver window so that we don't fail to send
22697 a SENDME. Fixes bug 11246; bugfix on 0.2.4.10-alpha.
22699 o Minor bugfixes (logging):
22700 - Fix a misformatted log message about delayed directory fetches.
22701 Fixes bug 11654; bugfix on 0.2.5.3-alpha.
22702 - Squelch a spurious LD_BUG message "No origin circuit for
22703 successful SOCKS stream" in certain hidden service failure cases;
22707 - Include a tor.service file in contrib/dist for use with systemd.
22708 Some distributions will be able to use this file unmodified;
22709 others will need to tweak it, or write their own. Patch from Jamie
22710 Nguyen; resolves ticket 8368.
22713 - Clean up several option names in the manpage to match their real
22714 names, add the missing documentation for a couple of testing and
22715 directory authority options, remove the documentation for a
22716 V2-directory fetching option that no longer exists. Resolves
22718 - Correct the documentation so that it lists the correct directory
22719 for the stats files. (They are in a subdirectory called "stats",
22721 - In the manpage, move more authority-only options into the
22722 directory authority section so that operators of regular directory
22723 caches don't get confused.
22726 - The contrib directory has been sorted and tidied. Before, it was
22727 an unsorted dumping ground for useful and not-so-useful things.
22728 Now, it is divided based on functionality, and the items which
22729 seemed to be nonfunctional or useless have been removed. Resolves
22730 ticket 8966; based on patches from "rl1987".
22733 - Remove /tor/dbg-stability.txt URL that was meant to help debug WFU
22734 and MTBF calculations, but that nobody was using. Fixes ticket 11742.
22735 - The TunnelDirConns and PreferTunnelledDirConns options no longer
22736 exist; tunneled directory connections have been available since
22737 0.1.2.5-alpha, and turning them off is not a good idea. This is a
22738 brute-force fix for 10849, where "TunnelDirConns 0" would break
22742 Changes in version 0.2.4.22 - 2014-05-16
22743 Tor 0.2.4.22 backports numerous high-priority fixes from the Tor 0.2.5
22744 alpha release series. These include blocking all authority signing
22745 keys that may have been affected by the OpenSSL "heartbleed" bug,
22746 choosing a far more secure set of TLS ciphersuites by default, closing
22747 a couple of memory leaks that could be used to run a target relay out
22748 of RAM, and several others.
22750 o Major features (security, backport from 0.2.5.4-alpha):
22751 - Block authority signing keys that were used on authorities
22752 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
22753 don't have any evidence that these keys _were_ compromised; we're
22754 doing this to be prudent.) Resolves ticket 11464.
22756 o Major bugfixes (security, OOM):
22757 - Fix a memory leak that could occur if a microdescriptor parse
22758 fails during the tokenizing step. This bug could enable a memory
22759 exhaustion attack by directory servers. Fixes bug 11649; bugfix
22762 o Major bugfixes (TLS cipher selection, backport from 0.2.5.4-alpha):
22763 - The relay ciphersuite list is now generated automatically based on
22764 uniform criteria, and includes all OpenSSL ciphersuites with
22765 acceptable strength and forward secrecy. Previously, we had left
22766 some perfectly fine ciphersuites unsupported due to omission or
22767 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
22768 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
22769 - Relays now trust themselves to have a better view than clients of
22770 which TLS ciphersuites are better than others. (Thanks to bug
22771 11513, the relay list is now well-considered, whereas the client
22772 list has been chosen mainly for anti-fingerprinting purposes.)
22773 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
22774 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
22775 AES128. Resolves ticket 11528.
22776 - Clients now try to advertise the same list of ciphersuites as
22777 Firefox 28. This change enables selection of (fast) GCM
22778 ciphersuites, disables some strange old ciphers, and stops
22779 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
22780 Resolves ticket 11438.
22782 o Minor bugfixes (configuration, security):
22783 - When running a hidden service, do not allow TunneledDirConns 0:
22784 trying to set that option together with a hidden service would
22785 otherwise prevent the hidden service from running, and also make
22786 it publish its descriptors directly over HTTP. Fixes bug 10849;
22787 bugfix on 0.2.1.1-alpha.
22789 o Minor bugfixes (controller, backport from 0.2.5.4-alpha):
22790 - Avoid sending a garbage value to the controller when a circuit is
22791 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
22793 o Minor bugfixes (exit relay, backport from 0.2.5.4-alpha):
22794 - Stop leaking memory when we successfully resolve a PTR record.
22795 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
22797 o Minor bugfixes (bridge client, backport from 0.2.5.4-alpha):
22798 - Avoid 60-second delays in the bootstrapping process when Tor is
22799 launching for a second time while using bridges. Fixes bug 9229;
22800 bugfix on 0.2.0.3-alpha.
22802 o Minor bugfixes (relays and bridges, backport from 0.2.5.4-alpha):
22803 - Give the correct URL in the warning message when trying to run a
22804 relay on an ancient version of Windows. Fixes bug 9393.
22806 o Minor bugfixes (compilation):
22807 - Fix a compilation error when compiling with --disable-curve25519.
22808 Fixes bug 9700; bugfix on 0.2.4.17-rc.
22811 - Downgrade the warning severity for the the "md was still
22812 referenced 1 node(s)" warning. Tor 0.2.5.4-alpha has better code
22813 for trying to diagnose this bug, and the current warning in
22814 earlier versions of tor achieves nothing useful. Addresses warning
22817 o Minor features (log verbosity, backport from 0.2.5.4-alpha):
22818 - When we run out of usable circuit IDs on a channel, log only one
22819 warning for the whole channel, and describe how many circuits
22820 there were on the channel. Fixes part of ticket 11553.
22822 o Minor features (security, backport from 0.2.5.4-alpha):
22823 - Decrease the lower limit of MaxMemInCellQueues to 256 MBytes (but
22824 leave the default at 8GBytes), to better support Raspberry Pi
22825 users. Fixes bug 9686; bugfix on 0.2.4.14-alpha.
22827 o Documentation (backport from 0.2.5.4-alpha):
22828 - Correctly document that we search for a system torrc file before
22829 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
22833 Changes in version 0.2.5.4-alpha - 2014-04-25
22834 Tor 0.2.5.4-alpha includes several security and performance
22835 improvements for clients and relays, including blacklisting authority
22836 signing keys that were used while susceptible to the OpenSSL
22837 "heartbleed" bug, fixing two expensive functions on busy relays,
22838 improved TLS ciphersuite preference lists, support for run-time
22839 hardening on compilers that support AddressSanitizer, and more work on
22840 the Linux sandbox code.
22842 There are also several usability fixes for clients (especially clients
22843 that use bridges), two new TransPort protocols supported (one on
22844 OpenBSD, one on FreeBSD), and various other bugfixes.
22846 This release marks end-of-life for Tor 0.2.2.x; those Tor versions
22847 have accumulated many known flaws; everyone should upgrade.
22849 o Major features (security):
22850 - If you don't specify MaxMemInQueues yourself, Tor now tries to
22851 pick a good value based on your total system memory. Previously,
22852 the default was always 8 GB. You can still override the default by
22853 setting MaxMemInQueues yourself. Resolves ticket 11396.
22854 - Block authority signing keys that were used on authorities
22855 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
22856 don't have any evidence that these keys _were_ compromised; we're
22857 doing this to be prudent.) Resolves ticket 11464.
22859 o Major features (relay performance):
22860 - Speed up server-side lookups of rendezvous and introduction point
22861 circuits by using hashtables instead of linear searches. These
22862 functions previously accounted between 3 and 7% of CPU usage on
22863 some busy relays. Resolves ticket 9841.
22864 - Avoid wasting CPU when extending a circuit over a channel that is
22865 nearly out of circuit IDs. Previously, we would do a linear scan
22866 over possible circuit IDs before finding one or deciding that we
22867 had exhausted our possibilities. Now, we try at most 64 random
22868 circuit IDs before deciding that we probably won't succeed. Fixes
22869 a possible root cause of ticket 11553.
22871 o Major features (seccomp2 sandbox, Linux only):
22872 - The seccomp2 sandbox can now run a test network for multiple hours
22873 without crashing. The sandbox is still experimental, and more bugs
22874 will probably turn up. To try it, enable "Sandbox 1" on a Linux
22875 host. Resolves ticket 11351.
22876 - Strengthen sandbox code: the sandbox can now test the arguments
22877 for rename(), and blocks _sysctl() entirely. Resolves another part
22879 - When the sandbox blocks a system call, it now tries to log a stack
22880 trace before exiting. Resolves ticket 11465.
22882 o Major bugfixes (TLS cipher selection):
22883 - The relay ciphersuite list is now generated automatically based on
22884 uniform criteria, and includes all OpenSSL ciphersuites with
22885 acceptable strength and forward secrecy. Previously, we had left
22886 some perfectly fine ciphersuites unsupported due to omission or
22887 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
22888 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
22889 - Relays now trust themselves to have a better view than clients of
22890 which TLS ciphersuites are better than others. (Thanks to bug
22891 11513, the relay list is now well-considered, whereas the client
22892 list has been chosen mainly for anti-fingerprinting purposes.)
22893 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
22894 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
22895 AES128. Resolves ticket 11528.
22896 - Clients now try to advertise the same list of ciphersuites as
22897 Firefox 28. This change enables selection of (fast) GCM
22898 ciphersuites, disables some strange old ciphers, and stops
22899 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
22900 Resolves ticket 11438.
22902 o Major bugfixes (bridge client):
22903 - Avoid 60-second delays in the bootstrapping process when Tor is
22904 launching for a second time while using bridges. Fixes bug 9229;
22905 bugfix on 0.2.0.3-alpha.
22907 o Minor features (transparent proxy, *BSD):
22908 - Support FreeBSD's ipfw firewall interface for TransPort ports on
22909 FreeBSD. To enable it, set "TransProxyType ipfw". Resolves ticket
22910 10267; patch from "yurivict".
22911 - Support OpenBSD's divert-to rules with the pf firewall for
22912 transparent proxy ports. To enable it, set "TransProxyType
22913 pf-divert". This allows Tor to run a TransPort transparent proxy
22914 port on OpenBSD 4.4 or later without root privileges. See the
22915 pf.conf(5) manual page for information on configuring pf to use
22916 divert-to rules. Closes ticket 10896; patch from Dana Koch.
22918 o Minor features (security):
22919 - New --enable-expensive-hardening option to enable security
22920 hardening options that consume nontrivial amounts of CPU and
22921 memory. Right now, this includes AddressSanitizer and UbSan, which
22922 are supported in newer versions of GCC and Clang. Closes ticket
22925 o Minor features (log verbosity):
22926 - Demote the message that we give when a flushing connection times
22927 out for too long from NOTICE to INFO. It was usually meaningless.
22928 Resolves ticket 5286.
22929 - Don't log so many notice-level bootstrapping messages at startup
22930 about downloading descriptors. Previously, we'd log a notice
22931 whenever we learned about more routers. Now, we only log a notice
22932 at every 5% of progress. Fixes bug 9963.
22933 - Warn less verbosely when receiving a malformed
22934 ESTABLISH_RENDEZVOUS cell. Fixes ticket 11279.
22935 - When we run out of usable circuit IDs on a channel, log only one
22936 warning for the whole channel, and describe how many circuits
22937 there were on the channel. Fixes part of ticket 11553.
22939 o Minor features (relay):
22940 - If a circuit timed out for at least 3 minutes, check if we have a
22941 new external IP address, and publish a new descriptor with the new
22942 IP address if it changed. Resolves ticket 2454.
22944 o Minor features (controller):
22945 - Make the entire exit policy available from the control port via
22946 GETINFO exit-policy/*. Implements enhancement 7952. Patch from
22948 - Because of the fix for ticket 11396, the real limit for memory
22949 usage may no longer match the configured MaxMemInQueues value. The
22950 real limit is now exposed via GETINFO limits/max-mem-in-queues.
22952 o Minor features (bridge client):
22953 - Report a more useful failure message when we can't connect to a
22954 bridge because we don't have the right pluggable transport
22955 configured. Resolves ticket 9665. Patch from Fábio J. Bertinatto.
22957 o Minor features (diagnostic):
22958 - Add more log messages to diagnose bug 7164, which causes
22959 intermittent "microdesc_free() called but md was still referenced"
22960 warnings. We now include more information, to figure out why we
22961 might be cleaning a microdescriptor for being too old if it's
22962 still referenced by a live node_t object.
22964 o Minor bugfixes (client, DNSPort):
22965 - When using DNSPort, try to respond to AAAA requests with AAAA
22966 answers. Previously, we hadn't looked at the request type when
22967 deciding which answer type to prefer. Fixes bug 10468; bugfix on
22969 - When receiving a DNS query for an unsupported record type, reply
22970 with no answer rather than with a NOTIMPL error. This behavior
22971 isn't correct either, but it will break fewer client programs, we
22972 hope. Fixes bug 10268; bugfix on 0.2.0.1-alpha. Original patch
22975 o Minor bugfixes (exit relay):
22976 - Stop leaking memory when we successfully resolve a PTR record.
22977 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
22979 o Minor bugfixes (bridge client):
22980 - Stop accepting bridge lines containing hostnames. Doing so would
22981 cause clients to perform DNS requests on the hostnames, which was
22982 not sensible behavior. Fixes bug 10801; bugfix on 0.2.0.1-alpha.
22983 - Avoid a 60-second delay in the bootstrapping process when a Tor
22984 client with pluggable transports re-reads its configuration at
22985 just the wrong time. Re-fixes bug 11156; bugfix on 0.2.5.3-alpha.
22987 o Minor bugfixes (client, logging during bootstrap):
22988 - Warn only once if we start logging in an unsafe way. Previously,
22989 we complain as many times as we had problems. Fixes bug 9870;
22990 bugfix on 0.2.5.1-alpha.
22991 - Only report the first fatal bootstrap error on a given OR
22992 connection. This stops us from telling the controller bogus error
22993 messages like "DONE". Fixes bug 10431; bugfix on 0.2.1.1-alpha.
22994 - Be more helpful when trying to run sandboxed on Linux without
22995 libseccomp. Instead of saying "Sandbox is not implemented on this
22996 platform", we now explain that we need to be built with
22997 libseccomp. Fixes bug 11543; bugfix on 0.2.5.1-alpha.
22998 - Avoid generating spurious warnings when starting with
22999 DisableNetwork enabled. Fixes bug 11200 and bug 10405; bugfix on
23002 o Minor bugfixes (closing OR connections):
23003 - If write_to_buf() in connection_write_to_buf_impl_() ever fails,
23004 check if it's an or_connection_t and correctly call
23005 connection_or_close_for_error() rather than
23006 connection_mark_for_close() directly. Fixes bug 11304; bugfix on
23008 - When closing all connections on setting DisableNetwork to 1, use
23009 connection_or_close_normally() rather than closing OR connections
23010 out from under the channel layer. Fixes bug 11306; bugfix on
23013 o Minor bugfixes (controller):
23014 - Avoid sending a garbage value to the controller when a circuit is
23015 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
23017 o Minor bugfixes (tor-fw-helper):
23018 - Allow tor-fw-helper to build again by adding src/ext to its
23019 CPPFLAGS. Fixes bug 11296; bugfix on 0.2.5.3-alpha.
23021 o Minor bugfixes (bridges):
23022 - Avoid potential crashes or bad behavior when launching a
23023 server-side managed proxy with ORPort or ExtORPort temporarily
23024 disabled. Fixes bug 9650; bugfix on 0.2.3.16-alpha.
23026 o Minor bugfixes (platform-specific):
23027 - Fix compilation on Solaris, which does not have <endian.h>. Fixes
23028 bug 11426; bugfix on 0.2.5.3-alpha.
23029 - When dumping a malformed directory object to disk, save it in
23030 binary mode on Windows, not text mode. Fixes bug 11342; bugfix on
23032 - Don't report failures from make_socket_reuseable() on incoming
23033 sockets on OSX: this can happen when incoming connections close
23034 early. Fixes bug 10081.
23036 o Minor bugfixes (trivial memory leaks):
23037 - Fix a small memory leak when signing a directory object. Fixes bug
23038 11275; bugfix on 0.2.4.13-alpha.
23039 - Free placeholder entries in our circuit table at exit; fixes a
23040 harmless memory leak. Fixes bug 11278; bugfix on 0.2.5.1-alpha.
23041 - Don't re-initialize a second set of OpenSSL mutexes when starting
23042 up. Previously, we'd make one set of mutexes, and then immediately
23043 replace them with another. Fixes bug 11726; bugfix on
23045 - Resolve some memory leaks found by coverity in the unit tests, on
23046 exit in tor-gencert, and on a failure to compute digests for our
23047 own keys when generating a v3 networkstatus vote. These leaks
23048 should never have affected anyone in practice.
23050 o Minor bugfixes (hidden service):
23051 - Only retry attempts to connect to a chosen rendezvous point 8
23052 times, not 30. Fixes bug 4241; bugfix on 0.1.0.1-rc.
23054 o Minor bugfixes (misc code correctness):
23055 - Fix various instances of undefined behavior in channeltls.c,
23056 tor_memmem(), and eventdns.c that would cause us to construct
23057 pointers to memory outside an allocated object. (These invalid
23058 pointers were not accessed, but C does not even allow them to
23059 exist.) Fixes bug 10363; bugfixes on 0.1.1.1-alpha, 0.1.2.1-alpha,
23060 0.2.0.10-alpha, and 0.2.3.6-alpha. Reported by "bobnomnom".
23061 - Use the AddressSanitizer and Ubsan sanitizers (in clang-3.4) to
23062 fix some miscellaneous errors in our tests and codebase. Fixes bug
23063 11232. Bugfixes on versions back as far as 0.2.1.11-alpha.
23064 - Always check return values for unlink, munmap, UnmapViewOfFile;
23065 check strftime return values more often. In some cases all we can
23066 do is report a warning, but this may help prevent deeper bugs from
23067 going unnoticed. Closes ticket 8787; bugfixes on many, many tor
23069 - Fix numerous warnings from the clang "scan-build" static analyzer.
23070 Some of these are programming style issues; some of them are false
23071 positives that indicated awkward code; some are undefined behavior
23072 cases related to constructing (but not using) invalid pointers;
23073 some are assumptions about API behavior; some are (harmlessly)
23074 logging sizeof(ptr) bytes from a token when sizeof(*ptr) would be
23075 correct; and one or two are genuine bugs that weren't reachable
23076 from the rest of the program. Fixes bug 8793; bugfixes on many,
23080 - Build the torify.1 manpage again. Previously, we were only trying
23081 to build it when also building tor-fw-helper. That's why we didn't
23082 notice that we'd broken the ability to build it. Fixes bug 11321;
23083 bugfix on 0.2.5.1-alpha.
23084 - Fix the layout of the SOCKSPort flags in the manpage. Fixes bug
23085 11061; bugfix on 0.2.4.7-alpha.
23086 - Correctly document that we search for a system torrc file before
23087 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
23089 - Resolve warnings from Doxygen.
23091 o Code simplifications and refactoring:
23092 - Remove is_internal_IP() function. Resolves ticket 4645.
23093 - Remove unused function circuit_dump_by_chan from circuitlist.c.
23094 Closes issue 9107; patch from "marek".
23095 - Change our use of the ENUM_BF macro to avoid declarations that
23098 o Deprecated versions:
23099 - Tor 0.2.2.x has reached end-of-life; it has received no patches or
23100 attention for some while. Directory authorities no longer accept
23101 descriptors from relays running any version of Tor prior to Tor
23102 0.2.3.16-alpha. Resolves ticket 11149.
23105 - New macros in test.h to simplify writing mock-functions for unit
23106 tests. Part of ticket 11507. Patch from Dana Koch.
23107 - Complete tests for the status.c module. Resolves ticket 11507.
23108 Patch from Dana Koch.
23111 - Remove all code for the long unused v1 directory protocol.
23112 Resolves ticket 11070.
23115 Changes in version 0.2.5.3-alpha - 2014-03-22
23116 Tor 0.2.5.3-alpha includes all the fixes from 0.2.4.21. It contains
23117 two new anti-DoS features for Tor relays, resolves a bug that kept
23118 SOCKS5 support for IPv6 from working, fixes several annoying usability
23119 issues for bridge users, and removes more old code for unused
23122 The Tor 0.2.5.x release series is now in patch-freeze: no feature
23123 patches not already written will be considered for inclusion in 0.2.5.x.
23125 o Major features (relay security, DoS-resistance):
23126 - When deciding whether we have run out of memory and we need to
23127 close circuits, also consider memory allocated in buffers for
23128 streams attached to each circuit.
23130 This change, which extends an anti-DoS feature introduced in
23131 0.2.4.13-alpha and improved in 0.2.4.14-alpha, lets Tor exit relays
23132 better resist more memory-based DoS attacks than before. Since the
23133 MaxMemInCellQueues option now applies to all queues, it is renamed
23134 to MaxMemInQueues. This feature fixes bug 10169.
23135 - Avoid hash-flooding denial-of-service attacks by using the secure
23136 SipHash-2-4 hash function for our hashtables. Without this
23137 feature, an attacker could degrade performance of a targeted
23138 client or server by flooding their data structures with a large
23139 number of entries to be stored at the same hash table position,
23140 thereby slowing down the Tor instance. With this feature, hash
23141 table positions are derived from a randomized cryptographic key,
23142 and an attacker cannot predict which entries will collide. Closes
23144 - Decrease the lower limit of MaxMemInQueues to 256 MBytes (but leave
23145 the default at 8GBytes), to better support Raspberry Pi users. Fixes
23146 bug 9686; bugfix on 0.2.4.14-alpha.
23148 o Minor features (bridges, pluggable transports):
23149 - Bridges now write the SHA1 digest of their identity key
23150 fingerprint (that is, a hash of a hash of their public key) to
23151 notice-level logs, and to a new hashed-fingerprint file. This
23152 information will help bridge operators look up their bridge in
23153 Globe and similar tools. Resolves ticket 10884.
23154 - Improve the message that Tor displays when running as a bridge
23155 using pluggable transports without an Extended ORPort listener.
23156 Also, log the message in the log file too. Resolves ticket 11043.
23158 o Minor features (other):
23159 - Add a new option, PredictedPortsRelevanceTime, to control how long
23160 after having received a request to connect to a given port Tor
23161 will try to keep circuits ready in anticipation of future requests
23162 for that port. Patch from "unixninja92"; implements ticket 9176.
23163 - Generate a warning if any ports are listed in the SocksPolicy,
23164 DirPolicy, AuthDirReject, AuthDirInvalid, AuthDirBadDir, or
23165 AuthDirBadExit options. (These options only support address
23166 ranges.) Fixes part of ticket 11108.
23167 - Update geoip and geoip6 to the February 7 2014 Maxmind GeoLite2
23170 o Minor bugfixes (new since 0.2.5.2-alpha, also in 0.2.4.21):
23171 - Build without warnings under clang 3.4. (We have some macros that
23172 define static functions only some of which will get used later in
23173 the module. Starting with clang 3.4, these give a warning unless the
23174 unused attribute is set on them.) Resolves ticket 10904.
23175 - Fix build warnings about missing "a2x" comment when building the
23176 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
23177 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
23179 o Minor bugfixes (client):
23180 - Improve the log message when we can't connect to a hidden service
23181 because all of the hidden service directory nodes hosting its
23182 descriptor are excluded. Improves on our fix for bug 10722, which
23183 was a bugfix on 0.2.0.10-alpha.
23184 - Raise a control port warning when we fail to connect to all of
23185 our bridges. Previously, we didn't inform the controller, and
23186 the bootstrap process would stall. Fixes bug 11069; bugfix on
23188 - Exit immediately when a process-owning controller exits.
23189 Previously, tor relays would wait for a little while after their
23190 controller exited, as if they had gotten an INT signal -- but this
23191 was problematic, since there was no feedback for the user. To do a
23192 clean shutdown, controllers should send an INT signal and give Tor
23193 a chance to clean up. Fixes bug 10449; bugfix on 0.2.2.28-beta.
23194 - Stop attempting to connect to bridges before our pluggable
23195 transports are configured (harmless but resulted in some erroneous
23196 log messages). Fixes bug 11156; bugfix on 0.2.3.2-alpha.
23197 - Fix connections to IPv6 addresses over SOCKS5. Previously, we were
23198 generating incorrect SOCKS5 responses, and confusing client
23199 applications. Fixes bug 10987; bugfix on 0.2.4.7-alpha.
23201 o Minor bugfixes (relays and bridges):
23202 - Avoid crashing on a malformed resolv.conf file when running a
23203 relay using Libevent 1. Fixes bug 8788; bugfix on 0.1.1.23.
23204 - Non-exit relays no longer launch mock DNS requests to check for
23205 DNS hijacking. This has been unnecessary since 0.2.1.7-alpha, when
23206 non-exit relays stopped servicing DNS requests. Fixes bug 965;
23207 bugfix on 0.2.1.7-alpha. Patch from Matt Pagan.
23208 - Bridges now report complete directory request statistics. Related
23209 to bug 5824; bugfix on 0.2.2.1-alpha.
23210 - Bridges now never collect statistics that were designed for
23211 relays. Fixes bug 5824; bugfix on 0.2.3.8-alpha.
23212 - Stop giving annoying warning messages when we decide not to launch
23213 a pluggable transport proxy that we don't need (because there are
23214 no bridges configured to use it). Resolves ticket 5018; bugfix
23216 - Give the correct URL in the warning message when trying to run a
23217 relay on an ancient version of Windows. Fixes bug 9393.
23219 o Minor bugfixes (backtrace support):
23220 - Support automatic backtraces on more platforms by using the
23221 "-fasynchronous-unwind-tables" compiler option. This option is
23222 needed for platforms like 32-bit Intel where "-fomit-frame-pointer"
23223 is on by default and table generation is not. This doesn't yet
23224 add Windows support; only Linux, OSX, and some BSDs are affected.
23225 Reported by 'cypherpunks'; fixes bug 11047; bugfix on 0.2.5.2-alpha.
23226 - Avoid strange behavior if two threads hit failed assertions at the
23227 same time and both try to log backtraces at once. (Previously, if
23228 this had happened, both threads would have stored their intermediate
23229 results in the same buffer, and generated junk outputs.) Reported by
23230 "cypherpunks". Fixes bug 11048; bugfix on 0.2.5.2-alpha.
23231 - Fix a compiler warning in format_number_sigsafe(). Bugfix on
23232 0.2.5.2-alpha; patch from Nick Hopper.
23234 o Minor bugfixes (unit tests):
23235 - Fix a small bug in the unit tests that might have made the tests
23236 call 'chmod' with an uninitialized bitmask. Fixes bug 10928;
23237 bugfix on 0.2.5.1-alpha. Patch from Dana Koch.
23240 - Remove all remaining code related to version-0 hidden service
23241 descriptors: they have not been in use since 0.2.2.1-alpha. Fixes
23242 the rest of bug 10841.
23245 - Document in the manpage that "KBytes" may also be written as
23246 "kilobytes" or "KB", that "Kbits" may also be written as
23247 "kilobits", and so forth. Closes ticket 9222.
23248 - Document that the ClientOnly config option overrides ORPort.
23249 Our old explanation made ClientOnly sound as though it did
23250 nothing at all. Resolves bug 9059.
23251 - Explain that SocksPolicy, DirPolicy, and similar options don't
23252 take port arguments. Fixes the other part of ticket 11108.
23253 - Fix a comment about the rend_server_descriptor_t.protocols field
23254 to more accurately describe its range. Also, make that field
23255 unsigned, to more accurately reflect its usage. Fixes bug 9099;
23256 bugfix on 0.2.1.5-alpha.
23257 - Fix the manpage's description of HiddenServiceAuthorizeClient:
23258 the maximum client name length is 16, not 19. Fixes bug 11118;
23259 bugfix on 0.2.1.6-alpha.
23261 o Code simplifications and refactoring:
23262 - Get rid of router->address, since in all cases it was just the
23263 string representation of router->addr. Resolves ticket 5528.
23265 o Test infrastructure:
23266 - Update to the latest version of tinytest.
23267 - Improve the tinytest implementation of string operation tests so
23268 that comparisons with NULL strings no longer crash the tests; they
23269 now just fail, normally. Fixes bug 9004; bugfix on 0.2.2.4-alpha.
23272 Changes in version 0.2.4.21 - 2014-02-28
23273 Tor 0.2.4.21 further improves security against potential adversaries who
23274 find breaking 1024-bit crypto doable, and backports several stability
23275 and robustness patches from the 0.2.5 branch.
23277 o Major features (client security):
23278 - When we choose a path for a 3-hop circuit, make sure it contains
23279 at least one relay that supports the NTor circuit extension
23280 handshake. Otherwise, there is a chance that we're building
23281 a circuit that's worth attacking by an adversary who finds
23282 breaking 1024-bit crypto doable, and that chance changes the game
23283 theory. Implements ticket 9777.
23286 - Do not treat streams that fail with reason
23287 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
23288 since it could also indicate an ENETUNREACH connection error. Fixes
23289 part of bug 10777; bugfix on 0.2.4.8-alpha.
23291 o Code simplification and refactoring:
23292 - Remove data structures which were introduced to implement the
23293 CellStatistics option: they are now redundant with the new timestamp
23294 field in the regular packed_cell_t data structure, which we did
23295 in 0.2.4.18-rc in order to resolve bug 9093. Resolves ticket 10870.
23298 - Always clear OpenSSL bignums before freeing them -- even bignums
23299 that don't contain secrets. Resolves ticket 10793. Patch by
23301 - Build without warnings under clang 3.4. (We have some macros that
23302 define static functions only some of which will get used later in
23303 the module. Starting with clang 3.4, these give a warning unless the
23304 unused attribute is set on them.) Resolves ticket 10904.
23305 - Update geoip and geoip6 files to the February 7 2014 Maxmind
23306 GeoLite2 Country database.
23309 - Set the listen() backlog limit to the largest actually supported
23310 on the system, not to the value in a header file. Fixes bug 9716;
23311 bugfix on every released Tor.
23312 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
23313 exit node as a NOROUTE error, not an INTERNAL error, since they
23314 can apparently happen when trying to connect to the wrong sort
23315 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
23316 - Fix build warnings about missing "a2x" comment when building the
23317 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
23318 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
23319 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
23320 not entirely remove it from the connection lists. Fixes bug 9602;
23321 bugfix on 0.2.4.4-alpha.
23322 - Fix a segmentation fault in our benchmark code when running with
23323 Fedora's OpenSSL package, or any other OpenSSL that provides
23324 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
23325 - Turn "circuit handshake stats since last time" log messages into a
23326 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
23328 o Documentation fixes:
23329 - Document that all but one DirPort entry must have the NoAdvertise
23330 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
23333 Changes in version 0.2.5.2-alpha - 2014-02-13
23334 Tor 0.2.5.2-alpha includes all the fixes from 0.2.4.18-rc and 0.2.4.20,
23335 like the "poor random number generation" fix and the "building too many
23336 circuits" fix. It also further improves security against potential
23337 adversaries who find breaking 1024-bit crypto doable, and launches
23338 pluggable transports on demand (which gets us closer to integrating
23339 pluggable transport support by default -- not to be confused with Tor
23340 bundles enabling pluggable transports and bridges by default).
23342 o Major features (client security):
23343 - When we choose a path for a 3-hop circuit, make sure it contains
23344 at least one relay that supports the NTor circuit extension
23345 handshake. Otherwise, there is a chance that we're building
23346 a circuit that's worth attacking by an adversary who finds
23347 breaking 1024-bit crypto doable, and that chance changes the game
23348 theory. Implements ticket 9777.
23349 - Clients now look at the "usecreatefast" consensus parameter to
23350 decide whether to use CREATE_FAST or CREATE cells for the first hop
23351 of their circuit. This approach can improve security on connections
23352 where Tor's circuit handshake is stronger than the available TLS
23353 connection security levels, but the tradeoff is more computational
23354 load on guard relays. Implements proposal 221. Resolves ticket 9386.
23356 o Major features (bridges):
23357 - Don't launch pluggable transport proxies if we don't have any
23358 bridges configured that would use them. Now we can list many
23359 pluggable transports, and Tor will dynamically start one when it
23360 hears a bridge address that needs it. Resolves ticket 5018.
23361 - The bridge directory authority now assigns status flags (Stable,
23362 Guard, etc) to bridges based on thresholds calculated over all
23363 Running bridges. Now bridgedb can finally make use of its features
23364 to e.g. include at least one Stable bridge in its answers. Fixes
23367 o Major features (other):
23368 - Extend ORCONN controller event to include an "ID" parameter,
23369 and add four new controller event types CONN_BW, CIRC_BW,
23370 CELL_STATS, and TB_EMPTY that show connection and circuit usage.
23371 The new events are emitted in private Tor networks only, with the
23372 goal of being able to better track performance and load during
23373 full-network simulations. Implements proposal 218 and ticket 7359.
23374 - On some platforms (currently: recent OSX versions, glibc-based
23375 platforms that support the ELF format, and a few other
23376 Unix-like operating systems), Tor can now dump stack traces
23377 when a crash occurs or an assertion fails. By default, traces
23378 are dumped to stderr (if possible) and to any logs that are
23379 reporting errors. Implements ticket 9299.
23382 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
23383 not entirely remove it from the connection lists. Fixes bug 9602;
23384 bugfix on 0.2.4.4-alpha.
23385 - Do not treat streams that fail with reason
23386 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
23387 since it could also indicate an ENETUNREACH connection error. Fixes
23388 part of bug 10777; bugfix on 0.2.4.8-alpha.
23390 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
23391 - Do not allow OpenSSL engines to replace the PRNG, even when
23392 HardwareAccel is set. The only default builtin PRNG engine uses
23393 the Intel RDRAND instruction to replace the entire PRNG, and
23394 ignores all attempts to seed it with more entropy. That's
23395 cryptographically stupid: the right response to a new alleged
23396 entropy source is never to discard all previously used entropy
23397 sources. Fixes bug 10402; works around behavior introduced in
23398 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
23400 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
23401 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
23402 - Avoid launching spurious extra circuits when a stream is pending.
23403 This fixes a bug where any circuit that _wasn't_ unusable for new
23404 streams would be treated as if it were, causing extra circuits to
23405 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
23407 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23408 - No longer stop reading or writing on cpuworker connections when
23409 our rate limiting buckets go empty. Now we should handle circuit
23410 handshake requests more promptly. Resolves bug 9731.
23411 - Stop trying to bootstrap all our directory information from
23412 only our first guard. Discovered while fixing bug 9946; bugfix
23415 o Minor features (bridges, pluggable transports):
23416 - Add threshold cutoffs to the networkstatus document created by
23417 the Bridge Authority. Fixes bug 1117.
23418 - On Windows, spawn background processes using the CREATE_NO_WINDOW
23419 flag. Now Tor Browser Bundle 3.5 with pluggable transports enabled
23420 doesn't pop up a blank console window. (In Tor Browser Bundle 2.x,
23421 Vidalia set this option for us.) Implements ticket 10297.
23423 o Minor features (security):
23424 - Always clear OpenSSL bignums before freeing them -- even bignums
23425 that don't contain secrets. Resolves ticket 10793. Patch by
23428 o Minor features (config options and command line):
23429 - Add an --allow-missing-torrc commandline option that tells Tor to
23430 run even if the configuration file specified by -f is not available.
23431 Implements ticket 10060.
23432 - Add support for the TPROXY transparent proxying facility on Linux.
23433 See documentation for the new TransProxyType option for more
23434 details. Implementation by "thomo". Closes ticket 10582.
23436 o Minor features (controller):
23437 - Add a new "HS_DESC" controller event that reports activities
23438 related to hidden service descriptors. Resolves ticket 8510.
23439 - New "DROPGUARDS" controller command to forget all current entry
23440 guards. Not recommended for ordinary use, since replacing guards
23441 too frequently makes several attacks easier. Resolves ticket 9934;
23444 o Minor features (build):
23445 - Assume that a user using ./configure --host wants to cross-compile,
23446 and give an error if we cannot find a properly named
23447 tool-chain. Add a --disable-tool-name-check option to proceed
23448 nevertheless. Addresses ticket 9869. Patch by Benedikt Gollatz.
23449 - If we run ./configure and the compiler recognizes -fstack-protector
23450 but the linker rejects it, warn the user about a potentially missing
23451 libssp package. Addresses ticket 9948. Patch from Benedikt Gollatz.
23453 o Minor features (testing):
23454 - If Python is installed, "make check" now runs extra tests beyond
23455 the unit test scripts.
23456 - When bootstrapping a test network, sometimes very few relays get
23457 the Guard flag. Now a new option "TestingDirAuthVoteGuard" can
23458 specify a set of relays which should be voted Guard regardless of
23459 their uptime or bandwidth. Addresses ticket 9206.
23461 o Minor features (log messages):
23462 - When ServerTransportPlugin is set on a bridge, Tor can write more
23463 useful statistics about bridge use in its extrainfo descriptors,
23464 but only if the Extended ORPort ("ExtORPort") is set too. Add a
23465 log message to inform the user in this case. Resolves ticket 9651.
23466 - When receiving a new controller connection, log the origin address.
23467 Resolves ticket 9698; patch from "sigpipe".
23468 - When logging OpenSSL engine status at startup, log the status of
23469 more engines. Fixes ticket 10043; patch from Joshua Datko.
23470 - Turn "circuit handshake stats since last time" log messages into a
23471 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
23473 o Minor features (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23474 - Improve the circuit queue out-of-memory handler. Previously, when
23475 we ran low on memory, we'd close whichever circuits had the most
23476 queued cells. Now, we close those that have the *oldest* queued
23477 cells, on the theory that those are most responsible for us
23478 running low on memory. Based on analysis from a forthcoming paper
23479 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
23480 - Generate bootstrapping status update events correctly when fetching
23481 microdescriptors. Fixes bug 9927.
23482 - Update to the October 2 2013 Maxmind GeoLite Country database.
23484 o Minor bugfixes (clients):
23485 - When closing a channel that has already been open, do not close
23486 pending circuits that were waiting to connect to the same relay.
23487 Fixes bug 9880; bugfix on 0.2.5.1-alpha. Thanks to skruffy for
23490 o Minor bugfixes (relays):
23491 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
23492 exit node as a NOROUTE error, not an INTERNAL error, since they
23493 can apparently happen when trying to connect to the wrong sort
23494 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
23496 o Minor bugfixes (bridges):
23497 - Fix a bug where the first connection works to a bridge that uses a
23498 pluggable transport with client-side parameters, but we don't send
23499 the client-side parameters on subsequent connections. (We don't
23500 use any pluggable transports with client-side parameters yet,
23501 but ScrambleSuit will soon become the first one.) Fixes bug 9162;
23502 bugfix on 0.2.0.3-alpha. Based on a patch from "rl1987".
23504 o Minor bugfixes (node selection):
23505 - If ExcludeNodes is set, consider non-excluded hidden service
23506 directory servers before excluded ones. Do not consider excluded
23507 hidden service directory servers at all if StrictNodes is
23508 set. (Previously, we would sometimes decide to connect to those
23509 servers, and then realize before we initiated a connection that
23510 we had excluded them.) Fixes bug 10722; bugfix on 0.2.0.10-alpha.
23511 Reported by "mr-4".
23512 - If we set the ExitNodes option but it doesn't include any nodes
23513 that have the Exit flag, we would choose not to bootstrap. Now we
23514 bootstrap so long as ExitNodes includes nodes which can exit to
23515 some port. Fixes bug 10543; bugfix on 0.2.4.10-alpha.
23517 o Minor bugfixes (controller and command-line):
23518 - If changing a config option via "setconf" fails in a recoverable
23519 way, we used to nonetheless write our new control ports to the
23520 file described by the "ControlPortWriteToFile" option. Now we only
23521 write out that file if we successfully switch to the new config
23522 option. Fixes bug 5605; bugfix on 0.2.2.26-beta. Patch from "Ryman".
23523 - When a command-line option such as --version or --help that
23524 ordinarily implies --hush appears on the command line along with
23525 --quiet, then actually obey --quiet. Previously, we obeyed --quiet
23526 only if it appeared later on the command line. Fixes bug 9578;
23527 bugfix on 0.2.5.1-alpha.
23529 o Minor bugfixes (code correctness):
23530 - Previously we used two temporary files when writing descriptors to
23531 disk; now we only use one. Fixes bug 1376.
23532 - Remove an erroneous (but impossible and thus harmless) pointer
23533 comparison that would have allowed compilers to skip a bounds
23534 check in channeltls.c. Fixes bugs 10313 and 9980; bugfix on
23535 0.2.0.10-alpha. Noticed by Jared L Wong and David Fifield.
23536 - Fix an always-true assertion in pluggable transports code so it
23537 actually checks what it was trying to check. Fixes bug 10046;
23538 bugfix on 0.2.3.9-alpha. Found by "dcb".
23540 o Minor bugfixes (protocol correctness):
23541 - When receiving a VERSIONS cell with an odd number of bytes, close
23542 the connection immediately since the cell is malformed. Fixes bug
23543 10365; bugfix on 0.2.0.10-alpha. Spotted by "bobnomnom"; fix by
23546 o Minor bugfixes (build):
23547 - Restore the ability to compile Tor with V2_HANDSHAKE_SERVER
23548 turned off (that is, without support for v2 link handshakes). Fixes
23549 bug 4677; bugfix on 0.2.3.2-alpha. Patch from "piet".
23550 - Fix compilation warnings and startup issues when running with
23551 "Sandbox 1" and libseccomp-2.1.0. Fixes bug 10563; bugfix on
23553 - Fix compilation on Solaris 9, which didn't like us having an
23554 identifier named "sun". Fixes bug 10565; bugfix in 0.2.5.1-alpha.
23556 o Minor bugfixes (testing):
23557 - Fix a segmentation fault in our benchmark code when running with
23558 Fedora's OpenSSL package, or any other OpenSSL that provides
23559 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
23561 o Minor bugfixes (log messages):
23562 - Fix a bug where clients using bridges would report themselves
23563 as 50% bootstrapped even without a live consensus document.
23564 Fixes bug 9922; bugfix on 0.2.1.1-alpha.
23565 - Suppress a warning where, if there's only one directory authority
23566 in the network, we would complain that votes and signatures cannot
23567 be uploaded to other directory authorities. Fixes bug 10842;
23568 bugfix on 0.2.2.26-beta.
23569 - Report bootstrapping progress correctly when we're downloading
23570 microdescriptors. We had updated our "do we have enough microdescs
23571 to begin building circuits?" logic most recently in 0.2.4.10-alpha
23572 (see bug 5956), but we left the bootstrap status event logic at
23573 "how far through getting 1/4 of them are we?" Fixes bug 9958;
23574 bugfix on 0.2.2.36, which is where they diverged (see bug 5343).
23576 o Minor bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
23577 - Avoid a crash bug when starting with a corrupted microdescriptor
23578 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
23579 - If we fail to dump a previously cached microdescriptor to disk, avoid
23580 freeing duplicate data later on. Fixes bug 10423; bugfix on
23581 0.2.4.13-alpha. Spotted by "bobnomnom".
23583 o Minor bugfixes on 0.2.4.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23584 - Correctly log long IPv6 exit policies, instead of truncating them
23585 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
23586 - Our default TLS ecdhe groups were backwards: we meant to be using
23587 P224 for relays (for performance win) and P256 for bridges (since
23588 it is more common in the wild). Instead we had it backwards. After
23589 reconsideration, we decided that the default should be P256 on all
23590 hosts, since its security is probably better, and since P224 is
23591 reportedly used quite little in the wild. Found by "skruffy" on
23592 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
23593 - Free directory authority certificate download statuses on exit
23594 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
23596 o Minor bugfixes on 0.2.3.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23597 - If the guard we choose first doesn't answer, we would try the
23598 second guard, but once we connected to the second guard we would
23599 abandon it and retry the first one, slowing down bootstrapping.
23600 The fix is to treat all our initially chosen guards as acceptable
23601 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
23602 - Fix an assertion failure that would occur when disabling the
23603 ORPort setting on a running Tor process while accounting was
23604 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
23605 - When examining the list of network interfaces to find our address,
23606 do not consider non-running or disabled network interfaces. Fixes
23607 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
23608 - Avoid an off-by-one error when checking buffer boundaries when
23609 formatting the exit status of a pluggable transport helper.
23610 This is probably not an exploitable bug, but better safe than
23611 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
23614 o Removed code and features:
23615 - Clients now reject any directory authority certificates lacking
23616 a dir-key-crosscert element. These have been included since
23617 0.2.1.9-alpha, so there's no real reason for them to be optional
23618 any longer. Completes proposal 157. Resolves ticket 10162.
23619 - Remove all code that existed to support the v2 directory system,
23620 since there are no longer any v2 directory authorities. Resolves
23622 - Remove the HSAuthoritativeDir and AlternateHSAuthority torrc
23623 options, which were used for designating authorities as "Hidden
23624 service authorities". There has been no use of hidden service
23625 authorities since 0.2.2.1-alpha, when we stopped uploading or
23626 downloading v0 hidden service descriptors. Fixes bug 10881; also
23627 part of a fix for bug 10841.
23629 o Code simplification and refactoring:
23630 - Remove some old fallback code designed to keep Tor clients working
23631 in a network with only two working relays. Elsewhere in the code we
23632 have long since stopped supporting such networks, so there wasn't
23633 much point in keeping it around. Addresses ticket 9926.
23634 - Reject 0-length EXTEND2 cells more explicitly. Fixes bug 10536;
23635 bugfix on 0.2.4.8-alpha. Reported by "cypherpunks".
23636 - Remove data structures which were introduced to implement the
23637 CellStatistics option: they are now redundant with the addition
23638 of a timestamp to the regular packed_cell_t data structure, which
23639 we did in 0.2.4.18-rc in order to resolve ticket 9093. Implements
23642 o Documentation (man page) fixes:
23643 - Update manpage to describe some of the files you can expect to
23644 find in Tor's DataDirectory. Addresses ticket 9839.
23645 - Document that all but one DirPort entry must have the NoAdvertise
23646 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
23648 o Documentation fixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23649 - Clarify the usage and risks of setting the ContactInfo torrc line
23650 for your relay or bridge. Resolves ticket 9854.
23651 - Add anchors to the manpage so we can link to the html version of
23652 the documentation for specific options. Resolves ticket 9866.
23653 - Replace remaining references to DirServer in man page and
23654 log entries. Resolves ticket 10124.
23657 - Make the "tor-gencert" tool used by directory authority operators
23658 create 2048-bit signing keys by default (rather than 1024-bit, since
23659 1024-bit is uncomfortably small these days). Addresses ticket 10324.
23662 Changes in version 0.2.4.20 - 2013-12-22
23663 Tor 0.2.4.20 fixes potentially poor random number generation for users
23664 who 1) use OpenSSL 1.0.0 or later, 2) set "HardwareAccel 1" in their
23665 torrc file, 3) have "Sandy Bridge" or "Ivy Bridge" Intel processors,
23666 and 4) have no state file in their DataDirectory (as would happen on
23667 first start). Users who generated relay or hidden service identity
23668 keys in such a situation should discard them and generate new ones.
23670 This release also fixes a logic error that caused Tor clients to build
23671 many more preemptive circuits than they actually need.
23674 - Do not allow OpenSSL engines to replace the PRNG, even when
23675 HardwareAccel is set. The only default builtin PRNG engine uses
23676 the Intel RDRAND instruction to replace the entire PRNG, and
23677 ignores all attempts to seed it with more entropy. That's
23678 cryptographically stupid: the right response to a new alleged
23679 entropy source is never to discard all previously used entropy
23680 sources. Fixes bug 10402; works around behavior introduced in
23681 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
23683 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
23684 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
23685 - Avoid launching spurious extra circuits when a stream is pending.
23686 This fixes a bug where any circuit that _wasn't_ unusable for new
23687 streams would be treated as if it were, causing extra circuits to
23688 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
23691 - Avoid a crash bug when starting with a corrupted microdescriptor
23692 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
23693 - If we fail to dump a previously cached microdescriptor to disk, avoid
23694 freeing duplicate data later on. Fixes bug 10423; bugfix on
23695 0.2.4.13-alpha. Spotted by "bobnomnom".
23698 Changes in version 0.2.4.19 - 2013-12-11
23699 The Tor 0.2.4 release series is dedicated to the memory of Aaron Swartz
23700 (1986-2013). Aaron worked on diverse projects including helping to guide
23701 Creative Commons, playing a key role in stopping SOPA/PIPA, bringing
23702 transparency to the U.S government's PACER documents, and contributing
23703 design and development for Tor and Tor2Web. Aaron was one of the latest
23704 martyrs in our collective fight for civil liberties and human rights,
23705 and his death is all the more painful because he was one of us.
23707 Tor 0.2.4.19, the first stable release in the 0.2.4 branch, features
23708 a new circuit handshake and link encryption that use ECC to provide
23709 better security and efficiency; makes relays better manage circuit
23710 creation requests; uses "directory guards" to reduce client enumeration
23711 risks; makes bridges collect and report statistics about the pluggable
23712 transports they support; cleans up and improves our geoip database;
23713 gets much closer to IPv6 support for clients, bridges, and relays; makes
23714 directory authorities use measured bandwidths rather than advertised
23715 ones when computing flags and thresholds; disables client-side DNS
23716 caching to reduce tracking risks; and fixes a big bug in bridge
23717 reachability testing. This release introduces two new design
23718 abstractions in the code: a new "channel" abstraction between circuits
23719 and or_connections to allow for implementing alternate relay-to-relay
23720 transports, and a new "circuitmux" abstraction storing the queue of
23721 circuits for a channel. The release also includes many stability,
23722 security, and privacy fixes.
23725 Changes in version 0.2.4.18-rc - 2013-11-16
23726 Tor 0.2.4.18-rc is the fourth release candidate for the Tor 0.2.4.x
23727 series. It takes a variety of fixes from the 0.2.5.x branch to improve
23728 stability, performance, and better handling of edge cases.
23731 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
23732 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
23733 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
23734 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
23735 them to solve bug 6033.)
23738 - No longer stop reading or writing on cpuworker connections when
23739 our rate limiting buckets go empty. Now we should handle circuit
23740 handshake requests more promptly. Resolves bug 9731.
23741 - If we are unable to save a microdescriptor to the journal, do not
23742 drop it from memory and then reattempt downloading it. Fixes bug
23743 9645; bugfix on 0.2.2.6-alpha.
23744 - Stop trying to bootstrap all our directory information from
23745 only our first guard. Discovered while fixing bug 9946; bugfix
23747 - The new channel code sometimes lost track of in-progress circuits,
23748 causing long-running clients to stop building new circuits. The
23749 fix is to always call circuit_n_chan_done(chan, 0) from
23750 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
23752 o Minor bugfixes (on 0.2.4.x):
23753 - Correctly log long IPv6 exit policies, instead of truncating them
23754 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
23755 - Our default TLS ecdhe groups were backwards: we meant to be using
23756 P224 for relays (for performance win) and P256 for bridges (since
23757 it is more common in the wild). Instead we had it backwards. After
23758 reconsideration, we decided that the default should be P256 on all
23759 hosts, since its security is probably better, and since P224 is
23760 reportedly used quite little in the wild. Found by "skruffy" on
23761 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
23762 - Free directory authority certificate download statuses on exit
23763 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
23765 o Minor bugfixes (on 0.2.3.x and earlier):
23766 - If the guard we choose first doesn't answer, we would try the
23767 second guard, but once we connected to the second guard we would
23768 abandon it and retry the first one, slowing down bootstrapping.
23769 The fix is to treat all our initially chosen guards as acceptable
23770 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
23771 - Fix an assertion failure that would occur when disabling the
23772 ORPort setting on a running Tor process while accounting was
23773 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
23774 - When examining the list of network interfaces to find our address,
23775 do not consider non-running or disabled network interfaces. Fixes
23776 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
23777 - Avoid an off-by-one error when checking buffer boundaries when
23778 formatting the exit status of a pluggable transport helper.
23779 This is probably not an exploitable bug, but better safe than
23780 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
23783 o Minor features (protecting client timestamps):
23784 - Clients no longer send timestamps in their NETINFO cells. These were
23785 not used for anything, and they provided one small way for clients
23786 to be distinguished from each other as they moved from network to
23787 network or behind NAT. Implements part of proposal 222.
23788 - Clients now round timestamps in INTRODUCE cells down to the nearest
23789 10 minutes. If a new Support022HiddenServices option is set to 0, or
23790 if it's set to "auto" and the feature is disabled in the consensus,
23791 the timestamp is sent as 0 instead. Implements part of proposal 222.
23792 - Stop sending timestamps in AUTHENTICATE cells. This is not such
23793 a big deal from a security point of view, but it achieves no actual
23794 good purpose, and isn't needed. Implements part of proposal 222.
23795 - Reduce down accuracy of timestamps in hidden service descriptors.
23796 Implements part of proposal 222.
23798 o Minor features (other):
23799 - Improve the circuit queue out-of-memory handler. Previously, when
23800 we ran low on memory, we'd close whichever circuits had the most
23801 queued cells. Now, we close those that have the *oldest* queued
23802 cells, on the theory that those are most responsible for us
23803 running low on memory. Based on analysis from a forthcoming paper
23804 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
23805 - Generate bootstrapping status update events correctly when fetching
23806 microdescriptors. Fixes bug 9927.
23807 - Update to the October 2 2013 Maxmind GeoLite Country database.
23809 o Documentation fixes:
23810 - Clarify the usage and risks of setting the ContactInfo torrc line
23811 for your relay or bridge. Resolves ticket 9854.
23812 - Add anchors to the manpage so we can link to the html version of
23813 the documentation for specific options. Resolves ticket 9866.
23814 - Replace remaining references to DirServer in man page and
23815 log entries. Resolves ticket 10124.
23818 Changes in version 0.2.5.1-alpha - 2013-10-02
23819 Tor 0.2.5.1-alpha introduces experimental support for syscall sandboxing
23820 on Linux, allows bridges that offer pluggable transports to report usage
23821 statistics, fixes many issues to make testing easier, and provides
23822 a pile of minor features and bugfixes that have been waiting for a
23823 release of the new branch.
23825 This is the first alpha release in a new series, so expect there to
23826 be bugs. Users who would rather test out a more stable branch should
23827 stay with 0.2.4.x for now.
23829 o Major features (security):
23830 - Use the seccomp2 syscall filtering facility on Linux to limit
23831 which system calls Tor can invoke. This is an experimental,
23832 Linux-only feature to provide defense-in-depth against unknown
23833 attacks. To try turning it on, set "Sandbox 1" in your torrc
23834 file. Please be ready to report bugs. We hope to add support
23835 for better sandboxing in the future, including more fine-grained
23836 filters, better division of responsibility, and support for more
23837 platforms. This work has been done by Cristian-Matei Toader for
23838 Google Summer of Code.
23839 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
23840 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
23841 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
23842 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
23843 them to solve bug 6033.)
23845 o Major features (other):
23846 - Add support for passing arguments to managed pluggable transport
23847 proxies. Implements ticket 3594.
23848 - Bridges now track GeoIP information and the number of their users
23849 even when pluggable transports are in use, and report usage
23850 statistics in their extra-info descriptors. Resolves tickets 4773
23852 - Make testing Tor networks bootstrap better: lower directory fetch
23853 retry schedules and maximum interval without directory requests,
23854 and raise maximum download tries. Implements ticket 6752.
23855 - Add make target 'test-network' to run tests on a Chutney network.
23856 Implements ticket 8530.
23857 - The ntor handshake is now on-by-default, no matter what the
23858 directory authorities recommend. Implements ticket 8561.
23861 - Instead of writing destroy cells directly to outgoing connection
23862 buffers, queue them and intersperse them with other outgoing cells.
23863 This can prevent a set of resource starvation conditions where too
23864 many pending destroy cells prevent data cells from actually getting
23865 delivered. Reported by "oftc_must_be_destroyed". Fixes bug 7912;
23866 bugfix on 0.2.0.1-alpha.
23867 - If we are unable to save a microdescriptor to the journal, do not
23868 drop it from memory and then reattempt downloading it. Fixes bug
23869 9645; bugfix on 0.2.2.6-alpha.
23870 - The new channel code sometimes lost track of in-progress circuits,
23871 causing long-running clients to stop building new circuits. The
23872 fix is to always call circuit_n_chan_done(chan, 0) from
23873 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
23876 - Tor now builds each source file in two modes: a mode that avoids
23877 exposing identifiers needlessly, and another mode that exposes
23878 more identifiers for testing. This lets the compiler do better at
23879 optimizing the production code, while enabling us to take more
23880 radical measures to let the unit tests test things.
23881 - The production builds no longer include functions used only in
23882 the unit tests; all functions exposed from a module only for
23883 unit-testing are now static in production builds.
23884 - Add an --enable-coverage configuration option to make the unit
23885 tests (and a new src/or/tor-cov target) to build with gcov test
23889 - We now have rudimentary function mocking support that our unit
23890 tests can use to test functions in isolation. Function mocking
23891 lets the tests temporarily replace a function's dependencies with
23892 stub functions, so that the tests can check the function without
23893 invoking the other functions it calls.
23894 - Add more unit tests for the <circid,channel>->circuit map, and
23895 the destroy-cell-tracking code to fix bug 7912.
23896 - Unit tests for failing cases of the TAP onion handshake.
23897 - More unit tests for address-manipulation functions.
23899 o Minor features (protecting client timestamps):
23900 - Clients no longer send timestamps in their NETINFO cells. These were
23901 not used for anything, and they provided one small way for clients
23902 to be distinguished from each other as they moved from network to
23903 network or behind NAT. Implements part of proposal 222.
23904 - Clients now round timestamps in INTRODUCE cells down to the nearest
23905 10 minutes. If a new Support022HiddenServices option is set to 0, or
23906 if it's set to "auto" and the feature is disabled in the consensus,
23907 the timestamp is sent as 0 instead. Implements part of proposal 222.
23908 - Stop sending timestamps in AUTHENTICATE cells. This is not such
23909 a big deal from a security point of view, but it achieves no actual
23910 good purpose, and isn't needed. Implements part of proposal 222.
23911 - Reduce down accuracy of timestamps in hidden service descriptors.
23912 Implements part of proposal 222.
23914 o Minor features (config options):
23915 - Config (torrc) lines now handle fingerprints which are missing
23916 their initial '$'. Resolves ticket 4341; improvement over 0.0.9pre5.
23917 - Support a --dump-config option to print some or all of the
23918 configured options. Mainly useful for debugging the command-line
23919 option parsing code. Helps resolve ticket 4647.
23920 - Raise awareness of safer logging: notify user of potentially
23921 unsafe config options, like logging more verbosely than severity
23922 "notice" or setting SafeLogging to 0. Resolves ticket 5584.
23923 - Add a new configuration option TestingV3AuthVotingStartOffset
23924 that bootstraps a network faster by changing the timing for
23925 consensus votes. Addresses ticket 8532.
23926 - Add a new torrc option "ServerTransportOptions" that allows
23927 bridge operators to pass configuration parameters to their
23928 pluggable transports. Resolves ticket 8929.
23929 - The config (torrc) file now accepts bandwidth and space limits in
23930 bits as well as bytes. (Anywhere that you can say "2 Kilobytes",
23931 you can now say "16 kilobits", and so on.) Resolves ticket 9214.
23934 o Minor features (build):
23935 - Add support for `--library-versions` flag. Implements ticket 6384.
23936 - Return the "unexpected sendme" warnings to a warn severity, but make
23937 them rate limited, to help diagnose ticket 8093.
23938 - Detect a missing asciidoc, and warn the user about it, during
23939 configure rather than at build time. Fixes issue 6506. Patch from
23942 o Minor features (other):
23943 - Use the SOCK_NONBLOCK socket type, if supported, to open nonblocking
23944 sockets in a single system call. Implements ticket 5129.
23945 - Log current accounting state (bytes sent and received + remaining
23946 time for the current accounting period) in the relay's heartbeat
23947 message. Implements ticket 5526; patch from Peter Retzlaff.
23948 - Implement the TRANSPORT_LAUNCHED control port event that
23949 notifies controllers about new launched pluggable
23950 transports. Resolves ticket 5609.
23951 - If we're using the pure-C 32-bit curve25519_donna implementation
23952 of curve25519, build it with the -fomit-frame-pointer option to
23953 make it go faster on register-starved hosts. This improves our
23954 handshake performance by about 6% on i386 hosts without nacl.
23955 Closes ticket 8109.
23956 - Update to the September 4 2013 Maxmind GeoLite Country database.
23959 - Set the listen() backlog limit to the largest actually supported
23960 on the system, not to the value in a header file. Fixes bug 9716;
23961 bugfix on every released Tor.
23962 - No longer accept malformed http headers when parsing urls from
23963 headers. Now we reply with Bad Request ("400"). Fixes bug 2767;
23964 bugfix on 0.0.6pre1.
23965 - In munge_extrainfo_into_routerinfo(), check the return value of
23966 memchr(). This would have been a serious issue if we ever passed
23967 it a non-extrainfo. Fixes bug 8791; bugfix on 0.2.0.6-alpha. Patch
23969 - On the chance that somebody manages to build Tor on a
23970 platform where time_t is unsigned, correct the way that
23971 microdesc_add_to_cache() handles negative time arguments.
23972 Fixes bug 8042; bugfix on 0.2.3.1-alpha.
23973 - Reject relative control socket paths and emit a warning. Previously,
23974 single-component control socket paths would be rejected, but Tor
23975 would not log why it could not validate the config. Fixes bug 9258;
23976 bugfix on 0.2.3.16-alpha.
23978 o Minor bugfixes (command line):
23979 - Use a single command-line parser for parsing torrc options on the
23980 command line and for finding special command-line options to avoid
23981 inconsistent behavior for torrc option arguments that have the same
23982 names as command-line options. Fixes bugs 4647 and 9578; bugfix on
23984 - No longer allow 'tor --hash-password' with no arguments. Fixes bug
23985 9573; bugfix on 0.0.9pre5.
23987 o Minor fixes (build, auxiliary programs):
23988 - Stop preprocessing the "torify" script with autoconf, since
23989 it no longer refers to LOCALSTATEDIR. Fixes bug 5505; patch
23991 - The tor-fw-helper program now follows the standard convention and
23992 exits with status code "0" on success. Fixes bug 9030; bugfix on
23993 0.2.3.1-alpha. Patch by Arlo Breault.
23994 - Corrected ./configure advice for what openssl dev package you should
23995 install on Debian. Fixes bug 9207; bugfix on 0.2.0.1-alpha.
23997 o Minor code improvements:
23998 - Remove constants and tests for PKCS1 padding; it's insecure and
23999 shouldn't be used for anything new. Fixes bug 8792; patch
24001 - Remove instances of strcpy() from the unit tests. They weren't
24002 hurting anything, since they were only in the unit tests, but it's
24003 embarrassing to have strcpy() in the code at all, and some analysis
24004 tools don't like it. Fixes bug 8790; bugfix on 0.2.3.6-alpha and
24005 0.2.3.8-alpha. Patch from Arlo Breault.
24007 o Removed features:
24008 - Remove migration code from when we renamed the "cached-routers"
24009 file to "cached-descriptors" back in 0.2.0.8-alpha. This
24010 incidentally resolves ticket 6502 by cleaning up the related code
24011 a bit. Patch from Akshay Hebbar.
24013 o Code simplification and refactoring:
24014 - Extract the common duplicated code for creating a subdirectory
24015 of the data directory and writing to a file in it. Fixes ticket
24016 4282; patch from Peter Retzlaff.
24017 - Since OpenSSL 0.9.7, the i2d_*() functions support allocating output
24018 buffer. Avoid calling twice: i2d_RSAPublicKey(), i2d_DHparams(),
24019 i2d_X509(), and i2d_PublicKey(). Resolves ticket 5170.
24020 - Add a set of accessor functions for the circuit timeout data
24021 structure. Fixes ticket 6153; patch from "piet".
24022 - Clean up exit paths from connection_listener_new(). Closes ticket
24023 8789. Patch from Arlo Breault.
24024 - Since we rely on OpenSSL 0.9.8 now, we can use EVP_PKEY_cmp()
24025 and drop our own custom pkey_eq() implementation. Fixes bug 9043.
24026 - Use a doubly-linked list to implement the global circuit list.
24027 Resolves ticket 9108. Patch from Marek Majkowski.
24028 - Remove contrib/id_to_fp.c since it wasn't used anywhere.
24031 Changes in version 0.2.4.17-rc - 2013-09-05
24032 Tor 0.2.4.17-rc is the third release candidate for the Tor 0.2.4.x
24033 series. It adds an emergency step to help us tolerate the massive
24034 influx of users: 0.2.4 clients using the new (faster and safer) "NTor"
24035 circuit-level handshakes now effectively jump the queue compared to
24036 the 0.2.3 clients using "TAP" handshakes. This release also fixes a
24037 big bug hindering bridge reachability tests.
24040 - Relays now process the new "NTor" circuit-level handshake requests
24041 with higher priority than the old "TAP" circuit-level handshake
24042 requests. We still process some TAP requests to not totally starve
24043 0.2.3 clients when NTor becomes popular. A new consensus parameter
24044 "NumNTorsPerTAP" lets us tune the balance later if we need to.
24045 Implements ticket 9574.
24048 - If the circuit build timeout logic is disabled (via the consensus,
24049 or because we are an authority), then don't build testing circuits.
24050 Fixes bug 9657; bugfix on 0.2.2.14-alpha.
24051 - Bridges now send AUTH_CHALLENGE cells during their v3 handshakes;
24052 previously they did not, which prevented them from receiving
24053 successful connections from relays for self-test or bandwidth
24054 testing. Also, when a relay is extending a circuit to a bridge,
24055 it needs to send a NETINFO cell, even when the bridge hasn't sent
24056 an AUTH_CHALLENGE cell. Fixes bug 9546; bugfix on 0.2.3.6-alpha.
24057 - If the time to download the next old-style networkstatus is in
24058 the future, do not decline to consider whether to download the
24059 next microdescriptor networkstatus. Fixes bug 9564; bugfix on
24063 - Avoid double-closing the listener socket in our socketpair()
24064 replacement (used on Windows) in the case where the addresses on
24065 our opened sockets don't match what we expected. Fixes bug 9400;
24066 bugfix on 0.0.2pre7. Found by Coverity.
24068 o Minor fixes (config options):
24069 - Avoid overflows when the user sets MaxCircuitDirtiness to a
24070 ridiculously high value, by imposing a (ridiculously high) 30-day
24071 maximum on MaxCircuitDirtiness.
24072 - Fix the documentation of HeartbeatPeriod to say that the heartbeat
24073 message is logged at notice, not at info.
24074 - Warn and fail if a server is configured not to advertise any
24075 ORPorts at all. (We need *something* to put in our descriptor,
24076 or we just won't work.)
24079 - Track how many "TAP" and "NTor" circuit handshake requests we get,
24080 and how many we complete, and log it every hour to help relay
24081 operators follow trends in network load. Addresses ticket 9658.
24082 - Update to the August 7 2013 Maxmind GeoLite Country database.
24085 Changes in version 0.2.4.16-rc - 2013-08-10
24086 Tor 0.2.4.16-rc is the second release candidate for the Tor 0.2.4.x
24087 series. It fixes several crash bugs in the 0.2.4 branch.
24090 - Fix a bug in the voting algorithm that could yield incorrect results
24091 when a non-naming authority declared too many flags. Fixes bug 9200;
24092 bugfix on 0.2.0.3-alpha.
24093 - Fix an uninitialized read that could in some cases lead to a remote
24094 crash while parsing INTRODUCE2 cells. Bugfix on 0.2.4.1-alpha.
24095 Anybody running a hidden service on the experimental 0.2.4.x
24096 branch should upgrade. (This is, so far as we know, unrelated to
24098 - Avoid an assertion failure when processing DNS replies without the
24099 answer types we expected. Fixes bug 9337; bugfix on 0.2.4.7-alpha.
24100 - Avoid a crash when using --hash-password. Fixes bug 9295; bugfix on
24101 0.2.4.15-rc. Found by stem integration tests.
24104 - Fix an invalid memory read that occurred when a pluggable
24105 transport proxy failed its configuration protocol.
24106 Fixes bug 9288; bugfix on 0.2.4.1-alpha.
24107 - When evaluating whether to use a connection that we haven't
24108 decided is canonical using a recent link protocol version,
24109 decide that it's canonical only if it used address _does_
24110 match the desired address. Fixes bug 9309; bugfix on
24111 0.2.4.4-alpha. Reported by skruffy.
24112 - Make the default behavior of NumDirectoryGuards be to track
24113 NumEntryGuards. Now a user who changes only NumEntryGuards will get
24114 the behavior she expects. Fixes bug 9354; bugfix on 0.2.4.8-alpha.
24115 - Fix a spurious compilation warning with some older versions of
24116 GCC on FreeBSD. Fixes bug 9254; bugfix on 0.2.4.14-alpha.
24119 - Update to the July 3 2013 Maxmind GeoLite Country database.
24122 Changes in version 0.2.4.15-rc - 2013-07-01
24123 Tor 0.2.4.15-rc is the first release candidate for the Tor 0.2.4.x
24124 series. It fixes a few smaller bugs, but generally appears stable.
24125 Please test it and let us know whether it is!
24128 - When receiving a new configuration file via the control port's
24129 LOADCONF command, do not treat the defaults file as absent.
24130 Fixes bug 9122; bugfix on 0.2.3.9-alpha.
24133 - Issue a warning when running with the bufferevents backend enabled.
24134 It's still not stable, and people should know that they're likely
24135 to hit unexpected problems. Closes ticket 9147.
24138 Changes in version 0.2.4.14-alpha - 2013-06-18
24139 Tor 0.2.4.14-alpha fixes a pair of client guard enumeration problems
24140 present in 0.2.4.13-alpha.
24143 - When we have too much memory queued in circuits (according to a new
24144 MaxMemInCellQueues option), close the circuits consuming the most
24145 memory. This prevents us from running out of memory as a relay if
24146 circuits fill up faster than they can be drained. Fixes bug 9063;
24147 bugfix on the 54th commit of Tor. This bug is a further fix beyond
24148 bug 6252, whose fix was merged into 0.2.3.21-rc.
24150 This change also fixes an earlier approach taken in 0.2.4.13-alpha,
24151 where we tried to solve this issue simply by imposing an upper limit
24152 on the number of queued cells for a single circuit. That approach
24153 proved to be problematic, since there are ways to provoke clients to
24154 send a number of cells in excess of any such reasonable limit. Fixes
24155 bug 9072; bugfix on 0.2.4.13-alpha.
24157 - Limit hidden service descriptors to at most ten introduction
24158 points, to slow one kind of guard enumeration. Fixes bug 9002;
24159 bugfix on 0.1.1.11-alpha.
24162 Changes in version 0.2.4.13-alpha - 2013-06-14
24163 Tor 0.2.4.13-alpha fixes a variety of potential remote crash
24164 vulnerabilities, makes socks5 username/password circuit isolation
24165 actually actually work (this time for sure!), and cleans up a bunch
24166 of other issues in preparation for a release candidate.
24168 o Major bugfixes (robustness):
24169 - Close any circuit that has too many cells queued on it. Fixes
24170 bug 9063; bugfix on the 54th commit of Tor. This bug is a further
24171 fix beyond bug 6252, whose fix was merged into 0.2.3.21-rc.
24172 - Prevent the get_freelists() function from running off the end of
24173 the list of freelists if it somehow gets an unrecognized
24174 allocation. Fixes bug 8844; bugfix on 0.2.0.16-alpha. Reported by
24176 - Avoid an assertion failure on OpenBSD (and perhaps other BSDs)
24177 when an exit connection with optimistic data succeeds immediately
24178 rather than returning EINPROGRESS. Fixes bug 9017; bugfix on
24180 - Fix a directory authority crash bug when building a consensus
24181 using an older consensus as its basis. Fixes bug 8833. Bugfix
24185 - Avoid a memory leak where we would leak a consensus body when we
24186 find that a consensus which we couldn't previously verify due to
24187 missing certificates is now verifiable. Fixes bug 8719; bugfix
24189 - We used to always request authority certificates by identity digest,
24190 meaning we'd get the newest one even when we wanted one with a
24191 different signing key. Then we would complain about being given
24192 a certificate we already had, and never get the one we really
24193 wanted. Now we use the "fp-sk/" resource as well as the "fp/"
24194 resource to request the one we want. Fixes bug 5595; bugfix on
24196 - Follow the socks5 protocol when offering username/password
24197 authentication. The fix for bug 8117 exposed this bug, and it
24198 turns out real-world applications like Pidgin do care. Bugfix on
24199 0.2.3.2-alpha; fixes bug 8879.
24200 - Prevent failures on Windows Vista and later when rebuilding the
24201 microdescriptor cache. Diagnosed by Robert Ransom. Fixes bug 8822;
24202 bugfix on 0.2.4.12-alpha.
24205 - Fix an impossible buffer overrun in the AES unit tests. Fixes
24206 bug 8845; bugfix on 0.2.0.7-alpha. Found by eugenis.
24207 - If for some reason we fail to write a microdescriptor while
24208 rebuilding the cache, do not let the annotations from that
24209 microdescriptor linger in the cache file, and do not let the
24210 microdescriptor stay recorded as present in its old location.
24211 Fixes bug 9047; bugfix on 0.2.2.6-alpha.
24212 - Fix a memory leak that would occur whenever a configuration
24213 option changed. Fixes bug 8718; bugfix on 0.2.3.3-alpha.
24214 - Paste the description for PathBias parameters from the man
24215 page into or.h, so the code documents them too. Fixes bug 7982;
24216 bugfix on 0.2.3.17-beta and 0.2.4.8-alpha.
24217 - Relays now treat a changed IPv6 ORPort as sufficient reason to
24218 publish an updated descriptor. Fixes bug 6026; bugfix on
24220 - When launching a resolve request on behalf of an AF_UNIX control
24221 socket, omit the address field of the new entry connection, used in
24222 subsequent controller events, rather than letting tor_dup_addr()
24223 set it to "<unknown address type>". Fixes bug 8639; bugfix on
24226 o Minor bugfixes (log messages):
24227 - Fix a scaling issue in the path bias accounting code that
24228 resulted in "Bug:" log messages from either
24229 pathbias_scale_close_rates() or pathbias_count_build_success().
24230 This represents a bugfix on a previous bugfix: the original fix
24231 attempted in 0.2.4.10-alpha was incomplete. Fixes bug 8235; bugfix
24233 - Give a less useless error message when the user asks for an IPv4
24234 address on an IPv6-only port, or vice versa. Fixes bug 8846; bugfix
24238 - Downgrade "unexpected SENDME" warnings to protocol-warn for 0.2.4.x,
24239 to tolerate bug 8093 for now.
24240 - Add an "ignoring-advertised-bws" boolean to the flag-threshold lines
24241 in directory authority votes to describe whether they have enough
24242 measured bandwidths to ignore advertised (relay descriptor)
24243 bandwidth claims. Resolves ticket 8711.
24244 - Update to the June 5 2013 Maxmind GeoLite Country database.
24246 o Removed documentation:
24247 - Remove some of the older contents of doc/ as obsolete; move others
24248 to torspec.git. Fixes bug 8965.
24250 o Code simplification and refactoring:
24251 - Avoid using character buffers when constructing most directory
24252 objects: this approach was unwieldy and error-prone. Instead,
24253 build smartlists of strings, and concatenate them when done.
24256 Changes in version 0.2.4.12-alpha - 2013-04-18
24257 Tor 0.2.4.12-alpha moves Tor forward on several fronts: it starts the
24258 process for lengthening the guard rotation period, makes directory
24259 authority opinions in the consensus a bit less gameable, makes socks5
24260 username/password circuit isolation actually work, and fixes a wide
24261 variety of other issues.
24264 - Raise the default time that a client keeps an entry guard from
24265 "1-2 months" to "2-3 months", as suggested by Tariq Elahi's WPES
24266 2012 paper. (We would make it even longer, but we need better client
24267 load balancing first.) Also, make the guard lifetime controllable
24268 via a new GuardLifetime torrc option and a GuardLifetime consensus
24269 parameter. Start of a fix for bug 8240; bugfix on 0.1.1.11-alpha.
24270 - Directory authorities now prefer using measured bandwidths to
24271 advertised ones when computing flags and thresholds. Resolves
24273 - Directory authorities that have more than a threshold number
24274 of relays with measured bandwidths now treat relays with unmeasured
24275 bandwidths as having bandwidth 0. Resolves ticket 8435.
24277 o Major bugfixes (assert / resource use):
24278 - Avoid a bug where our response to TLS renegotiation under certain
24279 network conditions could lead to a busy-loop, with 100% CPU
24280 consumption. Fixes bug 5650; bugfix on 0.2.0.16-alpha.
24281 - Avoid an assertion when we discover that we'd like to write a cell
24282 onto a closing connection: just discard the cell. Fixes another
24283 case of bug 7350; bugfix on 0.2.4.4-alpha.
24285 o Major bugfixes (client-side privacy):
24286 - When we mark a circuit as unusable for new circuits, have it
24287 continue to be unusable for new circuits even if MaxCircuitDirtiness
24288 is increased too much at the wrong time, or the system clock jumps
24289 backwards. Fixes bug 6174; bugfix on 0.0.2pre26.
24290 - If ClientDNSRejectInternalAddresses ("do not believe DNS queries
24291 which have resolved to internal addresses") is set, apply that
24292 rule to IPv6 as well. Fixes bug 8475; bugfix on 0.2.0.7-alpha.
24293 - When an exit relay rejects a stream with reason "exit policy", but
24294 we only know an exit policy summary (e.g. from the microdesc
24295 consensus) for it, do not mark the relay as useless for all exiting.
24296 Instead, mark just the circuit as unsuitable for that particular
24297 address. Fixes part of bug 7582; bugfix on 0.2.3.2-alpha.
24298 - Allow applications to get proper stream isolation with
24299 IsolateSOCKSAuth. Many SOCKS5 clients that want to offer
24300 username/password authentication also offer "no authentication". Tor
24301 had previously preferred "no authentication", so the applications
24302 never actually sent Tor their auth details. Now Tor selects
24303 username/password authentication if it's offered. You can disable
24304 this behavior on a per-SOCKSPort basis via PreferSOCKSNoAuth. Fixes
24305 bug 8117; bugfix on 0.2.3.3-alpha.
24307 o Major bugfixes (other):
24308 - When unable to find any working directory nodes to use as a
24309 directory guard, give up rather than adding the same non-working
24310 nodes to the directory guard list over and over. Fixes bug 8231;
24311 bugfix on 0.2.4.8-alpha.
24314 - Reject as invalid most directory objects containing a NUL.
24315 Belt-and-suspender fix for bug 8037.
24316 - In our testsuite, create temporary directories with a bit more
24317 entropy in their name to make name collisions less likely. Fixes
24319 - Add CACHED keyword to ADDRMAP events in the control protocol
24320 to indicate whether a DNS result will be cached or not. Resolves
24322 - Update to the April 3 2013 Maxmind GeoLite Country database.
24324 o Minor features (build):
24325 - Detect and reject attempts to build Tor with threading support
24326 when OpenSSL has been compiled without threading support.
24328 - Clarify that when autoconf is checking for nacl, it is checking
24329 specifically for nacl with a fast curve25519 implementation.
24331 - Warn if building on a platform with an unsigned time_t: there
24332 are too many places where Tor currently assumes that time_t can
24333 hold negative values. We'd like to fix them all, but probably
24336 o Minor bugfixes (build):
24337 - Fix some bugs in tor-fw-helper-natpmp when trying to build and
24338 run it on Windows. More bugs likely remain. Patch from Gisle Vanem.
24339 Fixes bug 7280; bugfix on 0.2.3.1-alpha.
24340 - Add the old src/or/micro-revision.i filename to CLEANFILES.
24341 On the off chance that somebody has one, it will go away as soon
24342 as they run "make clean". Fix for bug 7143; bugfix on 0.2.4.1-alpha.
24343 - Build Tor correctly on 32-bit platforms where the compiler can build
24344 but not run code using the "uint128_t" construction. Fixes bug 8587;
24345 bugfix on 0.2.4.8-alpha.
24346 - Fix compilation warning with some versions of clang that would
24347 prefer the -Wswitch-enum compiler flag to warn about switch
24348 statements with missing enum values, even if those switch
24349 statements have a "default:" statement. Fixes bug 8598; bugfix
24352 o Minor bugfixes (protocol):
24353 - Fix the handling of a TRUNCATE cell when it arrives while the
24354 circuit extension is in progress. Fixes bug 7947; bugfix on 0.0.7.1.
24355 - Fix a misframing issue when reading the version numbers in a
24356 VERSIONS cell. Previously we would recognize [00 01 00 02] as
24357 'version 1, version 2, and version 0x100', when it should have
24358 only included versions 1 and 2. Fixes bug 8059; bugfix on
24359 0.2.0.10-alpha. Reported pseudonymously.
24360 - Make the format and order of STREAM events for DNS lookups
24361 consistent among the various ways to launch DNS lookups. Fixes
24362 bug 8203; bugfix on 0.2.0.24-rc. Patch by "Desoxy".
24363 - Correct our check for which versions of Tor support the EXTEND2
24364 cell. We had been willing to send it to Tor 0.2.4.7-alpha and
24365 later, when support was really added in version 0.2.4.8-alpha.
24366 Fixes bug 8464; bugfix on 0.2.4.8-alpha.
24368 o Minor bugfixes (other):
24369 - Correctly store microdescriptors and extrainfo descriptors with
24370 an internal NUL byte. Fixes bug 8037; bugfix on 0.2.0.1-alpha.
24371 Bug reported by "cypherpunks".
24372 - Increase the width of the field used to remember a connection's
24373 link protocol version to two bytes. Harmless for now, since the
24374 only currently recognized versions are one byte long. Reported
24375 pseudonymously. Fixes bug 8062; bugfix on 0.2.0.10-alpha.
24376 - If the state file's path bias counts are invalid (presumably from a
24377 buggy Tor prior to 0.2.4.10-alpha), make them correct. Also add
24378 additional checks and log messages to the scaling of Path Bias
24379 counts, in case there still are remaining issues with scaling.
24380 Should help resolve bug 8235.
24381 - Eliminate several instances where we use "Nickname=ID" to refer to
24382 nodes in logs. Use "Nickname (ID)" instead. (Elsewhere, we still use
24383 "$ID=Nickname", which is also acceptable.) Fixes bug 7065. Bugfix
24384 on 0.2.3.21-rc, 0.2.4.5-alpha, 0.2.4.8-alpha, and 0.2.4.10-alpha.
24386 o Minor bugfixes (syscalls):
24387 - Always check the return values of functions fcntl() and
24388 setsockopt(). We don't believe these are ever actually failing in
24389 practice, but better safe than sorry. Also, checking these return
24390 values should please analysis tools like Coverity. Patch from
24391 'flupzor'. Fixes bug 8206; bugfix on all versions of Tor.
24392 - Use direct writes rather than stdio when building microdescriptor
24393 caches, in an attempt to mitigate bug 8031, or at least make it
24396 o Minor bugfixes (config):
24397 - When rejecting a configuration because we were unable to parse a
24398 quoted string, log an actual error message. Fixes bug 7950; bugfix
24400 - Behave correctly when the user disables LearnCircuitBuildTimeout
24401 but doesn't tell us what they would like the timeout to be. Fixes
24402 bug 6304; bugfix on 0.2.2.14-alpha.
24403 - When autodetecting the number of CPUs, use the number of available
24404 CPUs in preference to the number of configured CPUs. Inform the
24405 user if this reduces the number of available CPUs. Fixes bug 8002;
24406 bugfix on 0.2.3.1-alpha.
24407 - Make it an error when you set EntryNodes but disable UseGuardNodes,
24408 since it will (surprisingly to some users) ignore EntryNodes. Fixes
24409 bug 8180; bugfix on 0.2.3.11-alpha.
24410 - Allow TestingTorNetworks to override the 4096-byte minimum for
24411 the Fast threshold. Otherwise they can't bootstrap until they've
24412 observed more traffic. Fixes bug 8508; bugfix on 0.2.4.10-alpha.
24413 - Fix some logic errors when the user manually overrides the
24414 PathsNeededToBuildCircuits option in torrc. Fixes bug 8599; bugfix
24417 o Minor bugfixes (log messages to help diagnose bugs):
24418 - If we fail to free a microdescriptor because of bug 7164, log
24419 the filename and line number from which we tried to free it.
24420 - Add another diagnostic to the heartbeat message: track and log
24421 overhead that TLS is adding to the data we write. If this is
24422 high, we are sending too little data to SSL_write at a time.
24423 Diagnostic for bug 7707.
24424 - Add more detail to a log message about relaxed timeouts, to help
24426 - Warn more aggressively when flushing microdescriptors to a
24427 microdescriptor cache fails, in an attempt to mitigate bug 8031,
24428 or at least make it more diagnosable.
24429 - Improve debugging output to help track down bug 8185 ("Bug:
24430 outgoing relay cell has n_chan==NULL. Dropping.")
24431 - Log the purpose of a path-bias testing circuit correctly.
24432 Improves a log message from bug 8477; bugfix on 0.2.4.8-alpha.
24434 o Minor bugfixes (0.2.4.x log messages that were too noisy):
24435 - Don't attempt to relax the timeout of already opened 1-hop circuits.
24436 They might never timeout. This should eliminate some/all cases of
24437 the relaxed timeout log message.
24438 - Use circuit creation time for network liveness evaluation. This
24439 should eliminate warning log messages about liveness caused
24440 by changes in timeout evaluation. Fixes bug 6572; bugfix on
24442 - Reduce a path bias length check from notice to info. The message
24443 is triggered when creating controller circuits. Fixes bug 8196;
24444 bugfix on 0.2.4.8-alpha.
24445 - Fix a path state issue that triggered a notice during relay startup.
24446 Fixes bug 8320; bugfix on 0.2.4.10-alpha.
24447 - Reduce occurrences of warns about circuit purpose in
24448 connection_ap_expire_building(). Fixes bug 8477; bugfix on
24451 o Minor bugfixes (pre-0.2.4.x log messages that were too noisy):
24452 - If we encounter a write failure on a SOCKS connection before we
24453 finish our SOCKS handshake, don't warn that we closed the
24454 connection before we could send a SOCKS reply. Fixes bug 8427;
24455 bugfix on 0.1.0.1-rc.
24456 - Correctly recognize that [::1] is a loopback address. Fixes
24457 bug 8377; bugfix on 0.2.1.3-alpha.
24458 - Fix a directory authority warn caused when we have a large amount
24459 of badexit bandwidth. Fixes bug 8419; bugfix on 0.2.2.10-alpha.
24460 - Don't log inappropriate heartbeat messages when hibernating: a
24461 hibernating node is _expected_ to drop out of the consensus,
24462 decide it isn't bootstrapped, and so forth. Fixes bug 7302;
24463 bugfix on 0.2.3.1-alpha.
24464 - Don't complain about bootstrapping problems while hibernating.
24465 These complaints reflect a general code problem, but not one
24466 with any problematic effects (no connections are actually
24467 opened). Fixes part of bug 7302; bugfix on 0.2.3.2-alpha.
24469 o Documentation fixes:
24470 - Update tor-fw-helper.1.txt and tor-fw-helper.c to make option
24471 names match. Fixes bug 7768.
24472 - Make the torify manpage no longer refer to tsocks; torify hasn't
24473 supported tsocks since 0.2.3.14-alpha.
24474 - Make the tor manpage no longer reference tsocks.
24475 - Fix the GeoIPExcludeUnknown documentation to refer to
24476 ExcludeExitNodes rather than the currently nonexistent
24477 ExcludeEntryNodes. Spotted by "hamahangi" on tor-talk.
24480 - The tor-tsocks.conf is no longer distributed or installed. We
24481 recommend that tsocks users use torsocks instead. Resolves
24485 Changes in version 0.2.4.11-alpha - 2013-03-11
24486 Tor 0.2.4.11-alpha makes relay measurement by directory authorities
24487 more robust, makes hidden service authentication work again, and
24488 resolves a DPI fingerprint for Tor's SSL transport.
24490 o Major features (directory authorities):
24491 - Directory authorities now support a new consensus method (17)
24492 where they cap the published bandwidth of servers for which
24493 insufficient bandwidth measurements exist. Fixes part of bug 2286.
24494 - Directory authorities that set "DisableV2DirectoryInfo_ 1" no longer
24495 serve any v2 directory information. Now we can test disabling the
24496 old deprecated v2 directory format, and see whether doing so has
24497 any effect on network load. Begins to fix bug 6783.
24498 - Directory authorities now include inside each vote a statement of
24499 the performance thresholds they used when assigning flags.
24500 Implements ticket 8151.
24502 o Major bugfixes (directory authorities):
24503 - Stop marking every relay as having been down for one hour every
24504 time we restart a directory authority. These artificial downtimes
24505 were messing with our Stable and Guard flag calculations. Fixes
24506 bug 8218 (introduced by the fix for 1035). Bugfix on 0.2.2.23-alpha.
24508 o Major bugfixes (hidden services):
24509 - Allow hidden service authentication to succeed again. When we
24510 refactored the hidden service introduction code back
24511 in 0.2.4.1-alpha, we didn't update the code that checks
24512 whether authentication information is present, causing all
24513 authentication checks to return "false". Fix for bug 8207; bugfix
24514 on 0.2.4.1-alpha. Found by Coverity; this is CID 718615.
24516 o Minor features (relays, bridges):
24517 - Make bridge relays check once a minute for whether their IP
24518 address has changed, rather than only every 15 minutes. Resolves
24519 bugs 1913 and 1992.
24520 - Refactor resolve_my_address() so it returns the method by which we
24521 decided our public IP address (explicitly configured, resolved from
24522 explicit hostname, guessed from interfaces, learned by gethostname).
24523 Now we can provide more helpful log messages when a relay guesses
24524 its IP address incorrectly (e.g. due to unexpected lines in
24525 /etc/hosts). Resolves ticket 2267.
24526 - Teach bridge-using clients to avoid 0.2.2 bridges when making
24527 microdescriptor-related dir requests, and only fall back to normal
24528 descriptors if none of their bridges can handle microdescriptors
24529 (as opposed to the fix in ticket 4013, which caused them to fall
24530 back to normal descriptors if *any* of their bridges preferred
24531 them). Resolves ticket 4994.
24532 - Randomize the lifetime of our SSL link certificate, so censors can't
24533 use the static value for filtering Tor flows. Resolves ticket 8443;
24534 related to ticket 4014 which was included in 0.2.2.33.
24535 - Support a new version of the link protocol that allows 4-byte circuit
24536 IDs. Previously, circuit IDs were limited to 2 bytes, which presented
24537 a possible resource exhaustion issue. Closes ticket 7351; implements
24540 o Minor features (portability):
24541 - Tweak the curve25519-donna*.c implementations to tolerate systems
24542 that lack stdint.h. Fixes bug 3894; bugfix on 0.2.4.8-alpha.
24543 - Use Ville Laurikari's implementation of AX_CHECK_SIGN() to determine
24544 the signs of types during autoconf. This is better than our old
24545 approach, which didn't work when cross-compiling.
24546 - Detect the sign of enum values, rather than assuming that MSC is the
24547 only compiler where enum types are all signed. Fixes bug 7727;
24548 bugfix on 0.2.4.10-alpha.
24550 o Minor features (other):
24551 - Say "KBytes" rather than "KB" in the man page (for various values
24552 of K), to further reduce confusion about whether Tor counts in
24553 units of memory or fractions of units of memory. Resolves ticket 7054.
24554 - Clear the high bit on curve25519 public keys before passing them to
24555 our backend, in case we ever wind up using a backend that doesn't do
24556 so itself. If we used such a backend, and *didn't* clear the high bit,
24557 we could wind up in a situation where users with such backends would
24558 be distinguishable from users without. Fixes bug 8121; bugfix on
24560 - Update to the March 6 2013 Maxmind GeoLite Country database.
24562 o Minor bugfixes (clients):
24563 - When we receive a RELAY_END cell with the reason DONE, or with no
24564 reason, before receiving a RELAY_CONNECTED cell, report the SOCKS
24565 status as "connection refused". Previously we reported these cases
24566 as success but then immediately closed the connection. Fixes bug
24567 7902; bugfix on 0.1.0.1-rc. Reported by "oftc_must_be_destroyed".
24568 - Downgrade an assertion in connection_ap_expire_beginning to an
24569 LD_BUG message. The fix for bug 8024 should prevent this message
24570 from displaying, but just in case, a warn that we can diagnose
24571 is better than more assert crashes. Fixes bug 8065; bugfix on
24573 - Lower path use bias thresholds to .80 for notice and .60 for warn.
24574 Also make the rate limiting flags for the path use bias log messages
24575 independent from the original path bias flags. Fixes bug 8161;
24576 bugfix on 0.2.4.10-alpha.
24578 o Minor bugfixes (relays):
24579 - Stop trying to resolve our hostname so often (e.g. every time we
24580 think about doing a directory fetch). Now we reuse the cached
24581 answer in some cases. Fixes bugs 1992 (bugfix on 0.2.0.20-rc)
24582 and 2410 (bugfix on 0.1.2.2-alpha).
24583 - Stop sending a stray "(null)" in some cases for the server status
24584 "EXTERNAL_ADDRESS" controller event. Resolves bug 8200; bugfix
24586 - When choosing which stream on a formerly stalled circuit to wake
24587 first, make better use of the platform's weak RNG. Previously,
24588 we had been using the % ("modulo") operator to try to generate a
24589 1/N chance of picking each stream, but this behaves badly with
24590 many platforms' choice of weak RNG. Fixes bug 7801; bugfix on
24592 - Use our own weak RNG when we need a weak RNG. Windows's rand() and
24593 Irix's random() only return 15 bits; Solaris's random() returns more
24594 bits but its RAND_MAX says it only returns 15, and so on. Motivated
24595 by the fix for bug 7801; bugfix on 0.2.2.20-alpha.
24597 o Minor bugfixes (directory authorities):
24598 - Directory authorities now use less space when formatting identical
24599 microdescriptor lines in directory votes. Fixes bug 8158; bugfix
24602 o Minor bugfixes (memory leaks spotted by Coverity -- bug 7816):
24603 - Avoid leaking memory if we fail to compute a consensus signature
24604 or we generate a consensus we can't parse. Bugfix on 0.2.0.5-alpha.
24605 - Fix a memory leak when receiving headers from an HTTPS proxy. Bugfix
24607 - Fix a memory leak during safe-cookie controller authentication.
24608 Bugfix on 0.2.3.13-alpha.
24609 - Avoid memory leak of IPv6 policy content if we fail to format it into
24610 a router descriptor. Bugfix on 0.2.4.7-alpha.
24612 o Minor bugfixes (other code correctness issues):
24613 - Avoid a crash if we fail to generate an extrainfo descriptor.
24614 Fixes bug 8208; bugfix on 0.2.3.16-alpha. Found by Coverity;
24615 this is CID 718634.
24616 - When detecting the largest possible file descriptor (in order to
24617 close all file descriptors when launching a new program), actually
24618 use _SC_OPEN_MAX. The old code for doing this was very, very broken.
24619 Fixes bug 8209; bugfix on 0.2.3.1-alpha. Found by Coverity; this
24621 - Fix a copy-and-paste error when adding a missing A1 to a routerset
24622 because of GeoIPExcludeUnknown. Fix for Coverity CID 980650.
24623 Bugfix on 0.2.4.10-alpha.
24624 - Fix an impossible-to-trigger integer overflow when estimating how
24625 long our onionskin queue would take. (This overflow would require us
24626 to accept 4 million onionskins before processing 100 of them.) Fixes
24627 bug 8210; bugfix on 0.2.4.10-alpha.
24629 o Code simplification and refactoring:
24630 - Add a wrapper function for the common "log a message with a
24634 Changes in version 0.2.4.10-alpha - 2013-02-04
24635 Tor 0.2.4.10-alpha adds defenses at the directory authority level from
24636 certain attacks that flood the network with relays; changes the queue
24637 for circuit create requests from a sized-based limit to a time-based
24638 limit; resumes building with MSVC on Windows; and fixes a wide variety
24641 o Major bugfixes (directory authority):
24642 - When computing directory thresholds, ignore any rejected-as-sybil
24643 nodes during the computation so that they can't influence Fast,
24644 Guard, etc. (We should have done this for proposal 109.) Fixes
24646 - When marking a node as a likely sybil, reset its uptime metrics
24647 to zero, so that it cannot time towards getting marked as Guard,
24648 Stable, or HSDir. (We should have done this for proposal 109.) Fixes
24652 - When a TLS write is partially successful but incomplete, remember
24653 that the flushed part has been flushed, and notice that bytes were
24654 actually written. Reported and fixed pseudonymously. Fixes bug
24655 7708; bugfix on Tor 0.1.0.5-rc.
24656 - Reject bogus create and relay cells with 0 circuit ID or 0 stream
24657 ID: these could be used to create unexpected streams and circuits
24658 which would count as "present" to some parts of Tor but "absent"
24659 to others, leading to zombie circuits and streams or to a bandwidth
24660 denial-of-service. Fixes bug 7889; bugfix on every released version
24661 of Tor. Reported by "oftc_must_be_destroyed".
24662 - Rename all macros in our local copy of queue.h to begin with "TOR_".
24663 This change seems the only good way to permanently prevent conflicts
24664 with queue.h on various operating systems. Fixes bug 8107; bugfix
24667 o Major features (relay):
24668 - Instead of limiting the number of queued onionskins (aka circuit
24669 create requests) to a fixed, hard-to-configure number, we limit
24670 the size of the queue based on how many we expect to be able to
24671 process in a given amount of time. We estimate the time it will
24672 take to process an onionskin based on average processing time
24673 of previous onionskins. Closes ticket 7291. You'll never have to
24674 configure MaxOnionsPending again.
24676 o Major features (portability):
24677 - Resume building correctly with MSVC and Makefile.nmake. This patch
24678 resolves numerous bugs and fixes reported by ultramage, including
24679 7305, 7308, 7309, 7310, 7312, 7313, 7315, 7316, and 7669.
24680 - Make the ntor and curve25519 code build correctly with MSVC.
24681 Fix on 0.2.4.8-alpha.
24684 - When directory authorities are computing thresholds for flags,
24685 never let the threshold for the Fast flag fall below 4096
24686 bytes. Also, do not consider nodes with extremely low bandwidths
24687 when deciding thresholds for various directory flags. This change
24688 should raise our threshold for Fast relays, possibly in turn
24689 improving overall network performance; see ticket 1854. Resolves
24691 - The Tor client now ignores sub-domain components of a .onion
24692 address. This change makes HTTP "virtual" hosting
24693 possible: http://foo.aaaaaaaaaaaaaaaa.onion/ and
24694 http://bar.aaaaaaaaaaaaaaaa.onion/ can be two different websites
24695 hosted on the same hidden service. Implements proposal 204.
24696 - We compute the overhead from passing onionskins back and forth to
24697 cpuworkers, and report it when dumping statistics in response to
24698 SIGUSR1. Supports ticket 7291.
24700 o Minor features (path selection):
24701 - When deciding whether we have enough descriptors to build circuits,
24702 instead of looking at raw relay counts, look at which fraction
24703 of (bandwidth-weighted) paths we're able to build. This approach
24704 keeps clients from building circuits if their paths are likely to
24705 stand out statistically. The default fraction of paths needed is
24706 taken from the consensus directory; you can override it with the
24707 new PathsNeededToBuildCircuits option. Fixes ticket 5956.
24708 - When any country code is listed in ExcludeNodes or ExcludeExitNodes,
24709 and we have GeoIP information, also exclude all nodes with unknown
24710 countries "??" and "A1". This behavior is controlled by the
24711 new GeoIPExcludeUnknown option: you can make such nodes always
24712 excluded with "GeoIPExcludeUnknown 1", and disable the feature
24713 with "GeoIPExcludeUnknown 0". Setting "GeoIPExcludeUnknown auto"
24714 gets you the default behavior. Implements feature 7706.
24715 - Path Use Bias: Perform separate accounting for successful circuit
24716 use. Keep separate statistics on stream attempt rates versus stream
24717 success rates for each guard. Provide configurable thresholds to
24718 determine when to emit log messages or disable use of guards that
24719 fail too many stream attempts. Resolves ticket 7802.
24721 o Minor features (log messages):
24722 - When learning a fingerprint for a bridge, log its corresponding
24723 transport type. Implements ticket 7896.
24724 - Improve the log message when "Bug/attack: unexpected sendme cell
24725 from client" occurs, to help us track bug 8093.
24728 - Remove a couple of extraneous semicolons that were upsetting the
24729 cparser library. Patch by Christian Grothoff. Fixes bug 7115;
24730 bugfix on 0.2.2.1-alpha.
24731 - Remove a source of rounding error during path bias count scaling;
24732 don't count cannibalized circuits as used for path bias until we
24733 actually try to use them; and fix a circuit_package_relay_cell()
24734 warning message about n_chan==NULL. Fixes bug 7802.
24735 - Detect nacl when its headers are in a nacl/ subdirectory. Also,
24736 actually link against nacl when we're configured to use it. Fixes
24737 bug 7972; bugfix on 0.2.4.8-alpha.
24738 - Compile correctly with the --disable-curve25519 option. Fixes
24739 bug 8153; bugfix on 0.2.4.8-alpha.
24741 o Build improvements:
24742 - Do not report status verbosely from autogen.sh unless the -v flag
24743 is specified. Fixes issue 4664. Patch from Onizuka.
24744 - Replace all calls to snprintf() outside of src/ext with
24745 tor_snprintf(). Also remove the #define to replace snprintf with
24746 _snprintf on Windows; they have different semantics, and all of
24747 our callers should be using tor_snprintf() anyway. Fixes bug 7304.
24748 - Try to detect if we are ever building on a platform where
24749 memset(...,0,...) does not set the value of a double to 0.0. Such
24750 platforms are permitted by the C standard, though in practice
24751 they're pretty rare (since IEEE 754 is nigh-ubiquitous). We don't
24752 currently support them, but it's better to detect them and fail
24753 than to perform erroneously.
24755 o Removed features:
24756 - Stop exporting estimates of v2 and v3 directory traffic shares
24757 in extrainfo documents. They were unneeded and sometimes inaccurate.
24758 Also stop exporting any v2 directory request statistics. Resolves
24760 - Drop support for detecting and warning about versions of Libevent
24761 before 1.3e. Nothing reasonable ships with them any longer;
24762 warning the user about them shouldn't be needed. Resolves ticket
24765 o Code simplifications and refactoring:
24766 - Rename "isin" functions to "contains", for grammar. Resolves
24768 - Rename Tor's logging function log() to tor_log(), to avoid conflicts
24769 with the natural logarithm function from the system libm. Resolves
24773 Changes in version 0.2.4.9-alpha - 2013-01-15
24774 Tor 0.2.4.9-alpha provides a quick fix to make the new ntor handshake
24775 work more robustly.
24778 - Fix backward compatibility logic when receiving an embedded ntor
24779 handshake tunneled in a CREATE cell. This clears up the "Bug:
24780 couldn't format CREATED cell" warning. Fixes bug 7959; bugfix
24784 Changes in version 0.2.4.8-alpha - 2013-01-14
24785 Tor 0.2.4.8-alpha introduces directory guards to reduce user enumeration
24786 risks, adds a new stronger and faster circuit handshake, and offers
24787 stronger and faster link encryption when both sides support it.
24790 - Preliminary support for directory guards (proposal 207): when
24791 possible, clients now use their entry guards for non-anonymous
24792 directory requests. This can help prevent client enumeration. Note
24793 that this behavior only works when we have a usable consensus
24794 directory, and when options about what to download are more or less
24795 standard. In the future we should re-bootstrap from our guards,
24796 rather than re-bootstrapping from the preconfigured list of
24797 directory sources that ships with Tor. Resolves ticket 6526.
24798 - Tor relays and clients now support a better CREATE/EXTEND cell
24799 format, allowing the sender to specify multiple address, identity,
24800 and handshake types. Implements Robert Ransom's proposal 200;
24801 closes ticket 7199.
24803 o Major features (new circuit handshake):
24804 - Tor now supports a new circuit extension handshake designed by Ian
24805 Goldberg, Douglas Stebila, and Berkant Ustaoglu. Our original
24806 circuit extension handshake, later called "TAP", was a bit slow
24807 (especially on the relay side), had a fragile security proof, and
24808 used weaker keys than we'd now prefer. The new circuit handshake
24809 uses Dan Bernstein's "curve25519" elliptic-curve Diffie-Hellman
24810 function, making it significantly more secure than the older
24811 handshake, and significantly faster. Tor can use one of two built-in
24812 pure-C curve25519-donna implementations by Adam Langley, or it
24813 can link against the "nacl" library for a tuned version if present.
24815 The built-in version is very fast for 64-bit systems when building
24816 with GCC. The built-in 32-bit version is still faster than the
24817 old TAP protocol, but using libnacl is better on most such hosts.
24819 Clients don't currently use this protocol by default, since
24820 comparatively few clients support it so far. To try it, set
24821 UseNTorHandshake to 1.
24823 Implements proposal 216; closes ticket 7202.
24825 o Major features (better link encryption):
24826 - Relays can now enable the ECDHE TLS ciphersuites when available
24827 and appropriate. These ciphersuites let us negotiate forward-secure
24828 TLS secret keys more safely and more efficiently than with our
24829 previous use of Diffie-Hellman modulo a 1024-bit prime. By default,
24830 public relays prefer the (faster) P224 group, and bridges prefer
24831 the (more common) P256 group; you can override this with the
24834 Enabling these ciphers was a little tricky, since for a long time,
24835 clients had been claiming to support them without actually doing
24836 so, in order to foil fingerprinting. But with the client-side
24837 implementation of proposal 198 in 0.2.3.17-beta, clients can now
24838 match the ciphers from recent Firefox versions *and* list the
24839 ciphers they actually mean, so relays can believe such clients
24840 when they advertise ECDHE support in their TLS ClientHello messages.
24842 This feature requires clients running 0.2.3.17-beta or later,
24843 and requires both sides to be running OpenSSL 1.0.0 or later
24844 with ECC support. OpenSSL 1.0.1, with the compile-time option
24845 "enable-ec_nistp_64_gcc_128", is highly recommended.
24847 Implements the relay side of proposal 198; closes ticket 7200.
24850 - Avoid crashing when, as a relay without IPv6-exit support, a
24851 client insists on getting an IPv6 address or nothing. Fixes bug
24852 7814; bugfix on 0.2.4.7-alpha.
24855 - Improve circuit build timeout handling for hidden services.
24856 In particular: adjust build timeouts more accurately depending
24857 upon the number of hop-RTTs that a particular circuit type
24858 undergoes. Additionally, launch intro circuits in parallel
24859 if they timeout, and take the first one to reply as valid.
24860 - Work correctly on Unix systems where EAGAIN and EWOULDBLOCK are
24861 separate error codes; or at least, don't break for that reason.
24862 Fixes bug 7935. Reported by "oftc_must_be_destroyed".
24863 - Update to the January 2 2013 Maxmind GeoLite Country database.
24865 o Minor features (testing):
24866 - Add benchmarks for DH (1024-bit multiplicative group) and ECDH
24867 (P-256) Diffie-Hellman handshakes to src/or/bench.
24868 - Add benchmark functions to test onion handshake performance.
24870 o Minor features (path bias detection):
24871 - Alter the Path Bias log messages to be more descriptive in terms
24872 of reporting timeouts and other statistics.
24873 - Create three levels of Path Bias log messages, as opposed to just
24874 two. These are configurable via consensus as well as via the torrc
24875 options PathBiasNoticeRate, PathBiasWarnRate, PathBiasExtremeRate.
24876 The default values are 0.70, 0.50, and 0.30 respectively.
24877 - Separate the log message levels from the decision to drop guards,
24878 which also is available via torrc option PathBiasDropGuards.
24879 PathBiasDropGuards still defaults to 0 (off).
24880 - Deprecate PathBiasDisableRate in favor of PathBiasDropGuards
24881 in combination with PathBiasExtremeRate.
24882 - Increase the default values for PathBiasScaleThreshold and
24883 PathBiasCircThreshold from (200, 20) to (300, 150).
24884 - Add in circuit usage accounting to path bias. If we try to use a
24885 built circuit but fail for any reason, it counts as path bias.
24886 Certain classes of circuits where the adversary gets to pick your
24887 destination node are exempt from this accounting. Usage accounting
24888 can be specifically disabled via consensus parameter or torrc.
24889 - Convert all internal path bias state to double-precision floating
24890 point, to avoid roundoff error and other issues.
24891 - Only record path bias information for circuits that have completed
24892 *two* hops. Assuming end-to-end tagging is the attack vector, this
24893 makes us more resilient to ambient circuit failure without any
24894 detection capability loss.
24896 o Minor bugfixes (log messages):
24897 - Rate-limit the "No circuits are opened. Relaxed timeout for a
24898 circuit with channel state open..." message to once per hour to
24899 keep it from filling the notice logs. Mitigates bug 7799 but does
24900 not fix the underlying cause. Bugfix on 0.2.4.7-alpha.
24901 - Avoid spurious warnings when configuring multiple client ports of
24902 which only some are nonlocal. Previously, we had claimed that some
24903 were nonlocal when in fact they weren't. Fixes bug 7836; bugfix on
24906 o Code simplifications and refactoring:
24907 - Get rid of a couple of harmless clang warnings, where we compared
24908 enums to ints. These warnings are newly introduced in clang 3.2.
24909 - Split the onion.c file into separate modules for the onion queue
24910 and the different handshakes it supports.
24911 - Remove the marshalling/unmarshalling code for sending requests to
24912 cpuworkers over a socket, and instead just send structs. The
24913 recipient will always be the same Tor binary as the sender, so
24914 any encoding is overkill.
24917 Changes in version 0.2.4.7-alpha - 2012-12-24
24918 Tor 0.2.4.7-alpha introduces a new approach to providing fallback
24919 directory mirrors for more robust bootstrapping; fixes more issues where
24920 clients with changing network conditions refuse to make any circuits;
24921 adds initial support for exiting to IPv6 addresses; resumes being able
24922 to update our GeoIP database, and includes the geoip6 file this time;
24923 turns off the client-side DNS cache by default due to privacy risks;
24924 and fixes a variety of other issues.
24926 o Major features (client resilience):
24927 - Add a new "FallbackDir" torrc option to use when we can't use
24928 a directory mirror from the consensus (either because we lack a
24929 consensus, or because they're all down). Currently, all authorities
24930 are fallbacks by default, and there are no other default fallbacks,
24931 but that will change. This option will allow us to give clients a
24932 longer list of servers to try to get a consensus from when first
24933 connecting to the Tor network, and thereby reduce load on the
24934 directory authorities. Implements proposal 206, "Preconfigured
24935 directory sources for bootstrapping". We also removed the old
24936 "FallbackNetworkstatus" option, since we never got it working well
24937 enough to use it. Closes bug 572.
24938 - If we have no circuits open, use a relaxed timeout (the
24939 95-percentile cutoff) until a circuit succeeds. This heuristic
24940 should allow Tor to succeed at building circuits even when the
24941 network connection drastically changes. Should help with bug 3443.
24943 o Major features (IPv6):
24944 - Relays can now exit to IPv6 addresses: make sure that you have IPv6
24945 connectivity, then set the IPv6Exit flag to 1. Also make sure your
24946 exit policy reads as you would like: the address * applies to all
24947 address families, whereas *4 is IPv4 address only, and *6 is IPv6
24948 addresses only. On the client side, you'll need to wait until the
24949 authorities have upgraded, wait for enough exits to support IPv6,
24950 apply the "IPv6Traffic" flag to a SocksPort, and use Socks5. Closes
24951 ticket 5547, implements proposal 117 as revised in proposal 208.
24953 We DO NOT recommend that clients with actual anonymity needs start
24954 using IPv6 over Tor yet, since not enough exits support it yet.
24956 o Major features (geoip database):
24957 - Maxmind began labelling Tor relays as being in country "A1",
24958 which breaks by-country node selection inside Tor. Now we use a
24959 script to replace "A1" ("Anonymous Proxy") entries in our geoip
24960 file with real country codes. This script fixes about 90% of "A1"
24961 entries automatically and uses manual country code assignments to
24962 fix the remaining 10%. See src/config/README.geoip for details.
24963 Fixes bug 6266. Also update to the December 5 2012 Maxmind GeoLite
24964 Country database, as modified above.
24966 o Major bugfixes (client-side DNS):
24967 - Turn off the client-side DNS cache by default. Updating and using
24968 the DNS cache is now configurable on a per-client-port
24969 level. SOCKSPort, DNSPort, etc lines may now contain
24970 {No,}Cache{IPv4,IPv6,}DNS lines to indicate that we shouldn't
24971 cache these types of DNS answers when we receive them from an
24972 exit node in response to an application request on this port, and
24973 {No,}UseCached{IPv4,IPv6,DNS} lines to indicate that if we have
24974 cached DNS answers of these types, we shouldn't use them. It's
24975 potentially risky to use cached DNS answers at the client, since
24976 doing so can indicate to one exit what answers we've gotten
24977 for DNS lookups in the past. With IPv6, this becomes especially
24978 problematic. Using cached DNS answers for requests on the same
24979 circuit would present less linkability risk, since all traffic
24980 on a circuit is already linkable, but it would also provide
24981 little performance benefit: the exit node caches DNS replies
24982 too. Implements a simplified version of Proposal 205. Implements
24985 o Major bugfixes (other):
24986 - Alter circuit build timeout measurement to start at the point
24987 where we begin the CREATE/CREATE_FAST step (as opposed to circuit
24988 initialization). This should make our timeout measurements more
24989 uniform. Previously, we were sometimes including ORconn setup time
24990 in our circuit build time measurements. Should resolve bug 3443.
24991 - Fix an assertion that could trigger in hibernate_go_dormant() when
24992 closing an or_connection_t: call channel_mark_for_close() rather
24993 than connection_mark_for_close(). Fixes bug 7267. Bugfix on
24995 - Include the geoip6 IPv6 GeoIP database in the tarball. Fixes bug
24996 7655; bugfix on 0.2.4.6-alpha.
24999 - Add a new torrc option "ServerTransportListenAddr" to let bridge
25000 operators select the address where their pluggable transports will
25001 listen for connections. Resolves ticket 7013.
25002 - Allow an optional $ before the node identity digest in the
25003 controller command GETINFO ns/id/<identity>, for consistency with
25004 md/id/<identity> and desc/id/<identity>. Resolves ticket 7059.
25005 - Log packaged cell fullness as part of the heartbeat message.
25006 Diagnosis to try to determine the extent of bug 7743.
25008 o Minor features (IPv6):
25009 - AutomapHostsOnResolve now supports IPv6 addresses. By default, we
25010 prefer to hand out virtual IPv6 addresses, since there are more of
25011 them and we can't run out. To override this behavior and make IPv4
25012 addresses preferred, set NoPreferIPv6Automap on whatever SOCKSPort
25013 or DNSPort you're using for resolving. Implements ticket 7571.
25014 - AutomapHostsOnResolve responses are now randomized, to avoid
25015 annoying situations where Tor is restarted and applications
25016 connect to the wrong addresses.
25017 - Never try more than 1000 times to pick a new virtual address when
25018 AutomapHostsOnResolve is set. That's good enough so long as we
25019 aren't close to handing out our entire virtual address space;
25020 if you're getting there, it's best to switch to IPv6 virtual
25024 - The ADDRMAP command can no longer generate an ill-formed error
25025 code on a failed MAPADDRESS. It now says "internal" rather than
25026 an English sentence fragment with spaces in the middle. Bugfix on
25027 Tor 0.2.0.19-alpha.
25028 - Fix log messages and comments to avoid saying "GMT" when we mean
25029 "UTC". Fixes bug 6113.
25030 - Compile on win64 using mingw64. Fixes bug 7260; patches from
25032 - Fix a crash when debugging unit tests on Windows: deallocate a
25033 shared library with FreeLibrary, not CloseHandle. Fixes bug 7306;
25034 bugfix on 0.2.2.17-alpha. Reported by "ultramage".
25037 - The DirServer option is now DirAuthority, for consistency with
25038 current naming patterns. You can still use the old DirServer form.
25040 o Code simplification and refactoring:
25041 - Move the client-side address-map/virtual-address/DNS-cache code
25042 out of connection_edge.c into a new addressmap.c module.
25043 - Remove unused code for parsing v1 directories and "running routers"
25044 documents. Fixes bug 6887.
25047 Changes in version 0.2.3.25 - 2012-11-19
25048 The Tor 0.2.3 release series is dedicated to the memory of Len "rabbi"
25049 Sassaman (1980-2011), a long-time cypherpunk, anonymity researcher,
25050 Mixmaster maintainer, Pynchon Gate co-designer, CodeCon organizer,
25051 programmer, and friend. Unstinting in his dedication to the cause of
25052 freedom, he inspired and helped many of us as we began our work on
25053 anonymity, and inspires us still. Please honor his memory by writing
25054 software to protect people's freedoms, and by helping others to do so.
25056 Tor 0.2.3.25, the first stable release in the 0.2.3 branch, features
25057 significantly reduced directory overhead (via microdescriptors),
25058 enormous crypto performance improvements for fast relays on new
25059 enough hardware, a new v3 TLS handshake protocol that can better
25060 resist fingerprinting, support for protocol obfuscation plugins (aka
25061 pluggable transports), better scalability for hidden services, IPv6
25062 support for bridges, performance improvements like allowing clients
25063 to skip the first round-trip on the circuit ("optimistic data") and
25064 refilling token buckets more often, a new "stream isolation" design
25065 to isolate different applications on different circuits, and many
25066 stability, security, and privacy fixes.
25069 - Tor tries to wipe potentially sensitive data after using it, so
25070 that if some subsequent security failure exposes Tor's memory,
25071 the damage will be limited. But we had a bug where the compiler
25072 was eliminating these wipe operations when it decided that the
25073 memory was no longer visible to a (correctly running) program,
25074 hence defeating our attempt at defense in depth. We fix that
25075 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
25076 is unlikely to optimize away. Future versions of Tor may use
25077 a less ridiculously heavy approach for this. Fixes bug 7352.
25078 Reported in an article by Andrey Karpov.
25081 - Fix a harmless bug when opting against publishing a relay descriptor
25082 because DisableNetwork is set. Fixes bug 7464; bugfix on
25086 Changes in version 0.2.4.6-alpha - 2012-11-13
25087 Tor 0.2.4.6-alpha fixes an assert bug that has been plaguing relays,
25088 makes our defense-in-depth memory wiping more reliable, and begins to
25089 count IPv6 addresses in bridge statistics,
25092 - Fix an assertion failure that could occur when closing a connection
25093 with a spliced rendezvous circuit. Fix for bug 7212; bugfix on
25095 - Tor tries to wipe potentially sensitive data after using it, so
25096 that if some subsequent security failure exposes Tor's memory,
25097 the damage will be limited. But we had a bug where the compiler
25098 was eliminating these wipe operations when it decided that the
25099 memory was no longer visible to a (correctly running) program,
25100 hence defeating our attempt at defense in depth. We fix that
25101 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
25102 is unlikely to optimize away. Future versions of Tor may use
25103 a less ridiculously heavy approach for this. Fixes bug 7352.
25104 Reported in an article by Andrey Karpov.
25107 - Add GeoIP database for IPv6 addresses. The new config option
25109 - Bridge statistics now count bridge clients connecting over IPv6:
25110 bridge statistics files now list "bridge-ip-versions" and
25111 extra-info documents list "geoip6-db-digest". The control protocol
25112 "CLIENTS_SEEN" and "ip-to-country" queries now support IPv6. Initial
25113 implementation by "shkoo", addressing ticket 5055.
25116 - Warn when we are binding low ports when hibernation is enabled;
25117 previously we had warned when we were _advertising_ low ports with
25118 hibernation enabled. Fixes bug 7285; bugfix on 0.2.3.9-alpha.
25119 - Fix a harmless bug when opting against publishing a relay descriptor
25120 because DisableNetwork is set. Fixes bug 7464; bugfix on
25122 - Add warning message when a managed proxy dies during configuration.
25123 Fixes bug 7195; bugfix on 0.2.4.2-alpha.
25124 - Fix a linking error when building tor-fw-helper without miniupnp.
25125 Fixes bug 7235; bugfix on 0.2.4.2-alpha. Fix by Anthony G. Basile.
25126 - Check for closing an or_connection_t without going through correct
25127 channel functions; emit a warning and then call
25128 connection_or_close_for_error() so we don't assert as in bugs 7212
25130 - Compile correctly on compilers without C99 designated initializer
25131 support. Fixes bug 7286; bugfix on 0.2.4.4-alpha.
25132 - Avoid a possible assert that can occur when channel_send_destroy() is
25133 called on a channel in CHANNEL_STATE_CLOSING, CHANNEL_STATE_CLOSED,
25134 or CHANNEL_STATE_ERROR when the Tor process is resumed after being
25135 blocked for a long interval. Fixes bug 7350; bugfix on 0.2.4.4-alpha.
25136 - Fix a memory leak on failing cases of channel_tls_process_certs_cell.
25137 Fixes bug 7422; bugfix on 0.2.4.4-alpha.
25139 o Code simplification and refactoring:
25140 - Start using OpenBSD's implementation of queue.h, so that we don't
25141 need to hand-roll our own pointer and list structures whenever we
25142 need them. (We can't rely on a sys/queue.h, since some operating
25143 systems don't have them, and the ones that do have them don't all
25144 present the same extensions.)
25147 Changes in version 0.2.4.5-alpha - 2012-10-25
25148 Tor 0.2.4.5-alpha comes hard at the heels of 0.2.4.4-alpha, to fix
25149 two important security vulnerabilities that could lead to remotely
25150 triggerable relay crashes, fix a major bug that was preventing clients
25151 from choosing suitable exit nodes, and refactor some of our code.
25153 o Major bugfixes (security, also in 0.2.3.24-rc):
25154 - Fix a group of remotely triggerable assertion failures related to
25155 incorrect link protocol negotiation. Found, diagnosed, and fixed
25156 by "some guy from France". Fix for CVE-2012-2250; bugfix on
25158 - Fix a denial of service attack by which any directory authority
25159 could crash all the others, or by which a single v2 directory
25160 authority could crash everybody downloading v2 directory
25161 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
25163 o Major bugfixes (also in 0.2.3.24-rc):
25164 - When parsing exit policy summaries from microdescriptors, we had
25165 previously been ignoring the last character in each one, so that
25166 "accept 80,443,8080" would be treated by clients as indicating
25167 a node that allows access to ports 80, 443, and 808. That would
25168 lead to clients attempting connections that could never work,
25169 and ignoring exit nodes that would support their connections. Now
25170 clients parse these exit policy summaries correctly. Fixes bug 7192;
25171 bugfix on 0.2.3.1-alpha.
25173 o Minor bugfixes (also in 0.2.3.24-rc):
25174 - Clients now consider the ClientRejectInternalAddresses config option
25175 when using a microdescriptor consensus stanza to decide whether
25176 an exit relay would allow exiting to an internal address. Fixes
25177 bug 7190; bugfix on 0.2.3.1-alpha.
25180 - Only disable TLS session ticket support when running as a TLS
25181 server. Now clients will blend better with regular Firefox
25182 connections. Fixes bug 7189; bugfix on Tor 0.2.3.23-rc.
25184 o Code simplification and refactoring:
25185 - Start using OpenBSD's implementation of queue.h (originally by
25187 - Move the entry node code from circuitbuild.c to its own file.
25188 - Move the circuit build timeout tracking code from circuitbuild.c
25192 Changes in version 0.2.3.24-rc - 2012-10-25
25193 Tor 0.2.3.24-rc fixes two important security vulnerabilities that
25194 could lead to remotely triggerable relay crashes, and fixes
25195 a major bug that was preventing clients from choosing suitable exit
25198 o Major bugfixes (security):
25199 - Fix a group of remotely triggerable assertion failures related to
25200 incorrect link protocol negotiation. Found, diagnosed, and fixed
25201 by "some guy from France". Fix for CVE-2012-2250; bugfix on
25203 - Fix a denial of service attack by which any directory authority
25204 could crash all the others, or by which a single v2 directory
25205 authority could crash everybody downloading v2 directory
25206 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
25209 - When parsing exit policy summaries from microdescriptors, we had
25210 previously been ignoring the last character in each one, so that
25211 "accept 80,443,8080" would be treated by clients as indicating
25212 a node that allows access to ports 80, 443, and 808. That would
25213 lead to clients attempting connections that could never work,
25214 and ignoring exit nodes that would support their connections. Now
25215 clients parse these exit policy summaries correctly. Fixes bug 7192;
25216 bugfix on 0.2.3.1-alpha.
25219 - Clients now consider the ClientRejectInternalAddresses config option
25220 when using a microdescriptor consensus stanza to decide whether
25221 an exit relay would allow exiting to an internal address. Fixes
25222 bug 7190; bugfix on 0.2.3.1-alpha.
25225 Changes in version 0.2.4.4-alpha - 2012-10-20
25226 Tor 0.2.4.4-alpha adds a new v3 directory authority, fixes a privacy
25227 vulnerability introduced by a change in OpenSSL, fixes a remotely
25228 triggerable assert, and adds new channel_t and circuitmux_t abstractions
25229 that will make it easier to test new connection transport and cell
25230 scheduling algorithms.
25232 o New directory authorities (also in 0.2.3.23-rc):
25233 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
25234 authority. Closes ticket 5749.
25236 o Major bugfixes (security/privacy, also in 0.2.3.23-rc):
25237 - Disable TLS session tickets. OpenSSL's implementation was giving
25238 our TLS session keys the lifetime of our TLS context objects, when
25239 perfect forward secrecy would want us to discard anything that
25240 could decrypt a link connection as soon as the link connection
25241 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
25242 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
25243 - Discard extraneous renegotiation attempts once the V3 link
25244 protocol has been initiated. Failure to do so left us open to
25245 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
25246 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
25248 o Internal abstraction features:
25249 - Introduce new channel_t abstraction between circuits and
25250 or_connection_t to allow for implementing alternate OR-to-OR
25251 transports. A channel_t is an abstract object which can either be a
25252 cell-bearing channel, which is responsible for authenticating and
25253 handshaking with the remote OR and transmitting cells to and from
25254 it, or a listening channel, which spawns new cell-bearing channels
25255 at the request of remote ORs. Implements part of ticket 6465.
25256 - Also new is the channel_tls_t subclass of channel_t, adapting it
25257 to the existing or_connection_t code. The V2/V3 protocol handshaking
25258 code which formerly resided in command.c has been moved below the
25259 channel_t abstraction layer and may be found in channeltls.c now.
25260 Implements the rest of ticket 6465.
25261 - Introduce new circuitmux_t storing the queue of circuits for
25262 a channel; this encapsulates and abstracts the queue logic and
25263 circuit selection policy, and allows the latter to be overridden
25264 easily by switching out a policy object. The existing EWMA behavior
25265 is now implemented as a circuitmux_policy_t. Resolves ticket 6816.
25267 o Required libraries:
25268 - Tor now requires OpenSSL 0.9.8 or later. OpenSSL 1.0.0 or later is
25269 strongly recommended.
25272 - Warn users who run hidden services on a Tor client with
25273 UseEntryGuards disabled that their hidden services will be
25274 vulnerable to http://freehaven.net/anonbib/#hs-attack06 (the
25275 attack which motivated Tor to support entry guards in the first
25276 place). Resolves ticket 6889.
25277 - Tor now builds correctly on Bitrig, an OpenBSD fork. Patch from
25278 dhill. Resolves ticket 6982.
25279 - Option OutboundBindAddress can be specified multiple times and
25280 accepts IPv6 addresses. Resolves ticket 6876.
25282 o Minor bugfixes (also in 0.2.3.23-rc):
25283 - Don't serve or accept v2 hidden service descriptors over a
25284 relay's DirPort. It's never correct to do so, and disabling it
25285 might make it more annoying to exploit any bugs that turn up in the
25286 descriptor-parsing code. Fixes bug 7149.
25287 - Fix two cases in src/or/transports.c where we were calling
25288 fmt_addr() twice in a parameter list. Bug found by David
25289 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
25290 - Fix memory leaks whenever we logged any message about the "path
25291 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
25292 - When relays refuse a "create" cell because their queue of pending
25293 create cells is too big (typically because their cpu can't keep up
25294 with the arrival rate), send back reason "resource limit" rather
25295 than reason "internal", so network measurement scripts can get a
25296 more accurate picture. Fixes bug 7037; bugfix on 0.1.1.11-alpha.
25299 - Command-line option "--version" implies "--quiet". Fixes bug 6997.
25300 - Free some more still-in-use memory at exit, to make hunting for
25301 memory leaks easier. Resolves bug 7029.
25302 - When a Tor client gets a "truncated" relay cell, the first byte of
25303 its payload specifies why the circuit was truncated. We were
25304 ignoring this 'reason' byte when tearing down the circuit, resulting
25305 in the controller not being told why the circuit closed. Now we
25306 pass the reason from the truncated cell to the controller. Bugfix
25307 on 0.1.2.3-alpha; fixes bug 7039.
25308 - Downgrade "Failed to hand off onionskin" messages to "debug"
25309 severity, since they're typically redundant with the "Your computer
25310 is too slow" messages. Fixes bug 7038; bugfix on 0.2.2.16-alpha.
25311 - Make clients running with IPv6 bridges connect over IPv6 again,
25312 even without setting new config options ClientUseIPv6 and
25313 ClientPreferIPv6ORPort. Fixes bug 6757; bugfix on 0.2.4.1-alpha.
25314 - Use square brackets around IPv6 addresses in numerous places
25315 that needed them, including log messages, HTTPS CONNECT proxy
25316 requests, TransportProxy statefile entries, and pluggable transport
25317 extra-info lines. Fixes bug 7011; patch by David Fifield.
25319 o Code refactoring and cleanup:
25320 - Source files taken from other packages now reside in src/ext;
25321 previously they were scattered around the rest of Tor.
25322 - Avoid use of reserved identifiers in our C code. The C standard
25323 doesn't like us declaring anything that starts with an
25324 underscore, so let's knock it off before we get in trouble. Fix
25325 for bug 1031; bugfix on the first Tor commit.
25328 Changes in version 0.2.3.23-rc - 2012-10-20
25329 Tor 0.2.3.23-rc adds a new v3 directory authority, fixes a privacy
25330 vulnerability introduced by a change in OpenSSL, and fixes a variety
25331 of smaller bugs in preparation for the release.
25333 o New directory authorities:
25334 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
25335 authority. Closes ticket 5749.
25337 o Major bugfixes (security/privacy):
25338 - Disable TLS session tickets. OpenSSL's implementation was giving
25339 our TLS session keys the lifetime of our TLS context objects, when
25340 perfect forward secrecy would want us to discard anything that
25341 could decrypt a link connection as soon as the link connection
25342 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
25343 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
25344 - Discard extraneous renegotiation attempts once the V3 link
25345 protocol has been initiated. Failure to do so left us open to
25346 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
25347 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
25350 - Fix a possible crash bug when checking for deactivated circuits
25351 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
25352 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
25354 o Minor bugfixes (on 0.2.3.x):
25355 - Fix two cases in src/or/transports.c where we were calling
25356 fmt_addr() twice in a parameter list. Bug found by David
25357 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
25358 - Convert an assert in the pathbias code to a log message. The assert
25359 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
25360 bugfix on 0.2.3.17-beta.
25361 - Fix memory leaks whenever we logged any message about the "path
25362 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
25364 o Minor bugfixes (on 0.2.2.x and earlier):
25365 - Don't serve or accept v2 hidden service descriptors over a relay's
25366 DirPort. It's never correct to do so, and disabling it might
25367 make it more annoying to exploit any bugs that turn up in the
25368 descriptor-parsing code. Fixes bug 7149.
25369 - When relays refuse a "create" cell because their queue of pending
25370 create cells is too big (typically because their cpu can't keep up
25371 with the arrival rate), send back reason "resource limit" rather
25372 than reason "internal", so network measurement scripts can get a
25373 more accurate picture. Bugfix on 0.1.1.11-alpha; fixes bug 7037.
25374 - Correct file sizes when reading binary files on Cygwin, to avoid
25375 a bug where Tor would fail to read its state file. Fixes bug 6844;
25376 bugfix on 0.1.2.7-alpha.
25377 - Avoid undefined behavior when parsing the list of supported
25378 rendezvous/introduction protocols in a hidden service descriptor.
25379 Previously, Tor would have confused (as-yet-unused) protocol version
25380 numbers greater than 32 with lower ones on many platforms. Fixes
25381 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
25383 o Documentation fixes:
25384 - Clarify that hidden services are TCP only. Fixes bug 6024.
25387 Changes in version 0.2.4.3-alpha - 2012-09-22
25388 Tor 0.2.4.3-alpha fixes another opportunity for a remotely triggerable
25389 assertion, resumes letting relays test reachability of their DirPort,
25390 and cleans up a bunch of smaller bugs.
25393 - Fix an assertion failure in tor_timegm() that could be triggered
25394 by a badly formatted directory object. Bug found by fuzzing with
25395 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
25398 - Fix a possible crash bug when checking for deactivated circuits
25399 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
25400 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
25401 - Allow routers to detect that their own DirPorts are running. When
25402 we removed support for versions_supports_begindir, we also
25403 accidentally removed the mechanism we used to self-test our
25404 DirPort. Diagnosed with help from kargig. Fixes bugs 6814 and 6815;
25405 bugfix on 0.2.4.2-alpha.
25407 o Security features:
25408 - Switch to a completely time-invariant approach for picking nodes
25409 weighted by bandwidth. Our old approach would run through the
25410 part of the loop after it had made its choice slightly slower
25411 than it ran through the part of the loop before it had made its
25412 choice. Addresses ticket 6538.
25413 - Disable the use of Guard nodes when in Tor2WebMode. Guard usage
25414 by tor2web clients allows hidden services to identify tor2web
25415 clients through their repeated selection of the same rendezvous
25416 and introduction point circuit endpoints (their guards). Resolves
25420 - Enable Tor to read configuration, state, and key information from
25421 a FIFO. Previously Tor would only read from files with a positive
25422 stat.st_size. Code from meejah; fixes bug 6044.
25425 - Correct file sizes when reading binary files on Cygwin, to avoid
25426 a bug where Tor would fail to read its state file. Fixes bug 6844;
25427 bugfix on 0.1.2.7-alpha.
25428 - Correctly handle votes with more than 31 flags. Fixes bug 6853;
25429 bugfix on 0.2.0.3-alpha.
25430 - When complaining about a client port on a public address, log
25431 which address we're complaining about. Fixes bug 4020; bugfix on
25432 0.2.3.3-alpha. Patch by Tom Fitzhenry.
25433 - Convert an assert in the pathbias code to a log message. The assert
25434 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
25435 bugfix on 0.2.3.17-beta.
25436 - Our new buildsystem was overzealous about rebuilding manpages: it
25437 would rebuild them all whenever any one of them changed. Now our
25438 dependency checking should be correct. Fixes bug 6843; bugfix on
25440 - Don't do reachability testing over IPv6 unless AuthDirPublishIPv6
25441 is set. Fixes bug 6880. Bugfix on 0.2.4.1-alpha.
25442 - Correct log printout about which address family is preferred
25443 when connecting to a bridge with both an IPv4 and IPv6 OR port.
25444 Fixes bug 6884; bugfix on 0.2.4.1-alpha.
25446 o Minor bugfixes (code cleanliness):
25447 - Fix round_to_power_of_2() so it doesn't invoke undefined behavior
25448 with large values. This situation was untriggered, but nevertheless
25449 incorrect. Fixes bug 6831; bugfix on 0.2.0.1-alpha.
25450 - Reject consensus votes with more than 64 known-flags. We aren't even
25451 close to that limit yet, and our code doesn't handle it correctly.
25452 Fixes bug 6833; bugfix on 0.2.0.1-alpha.
25453 - Avoid undefined behavior when parsing the list of supported
25454 rendezvous/introduction protocols in a hidden service descriptor.
25455 Previously, Tor would have confused (as-yet-unused) protocol version
25456 numbers greater than 32 with lower ones on many platforms. Fixes
25457 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
25458 - Fix handling of rendezvous client authorization types over 8.
25459 Fixes bug 6861; bugfix on 0.2.1.5-alpha.
25460 - Fix building with older versions of GCC (2.95, for one) that don't
25461 like preprocessor directives inside macro arguments. Found by
25462 grarpamp. Fixes bug 6842; bugfix on 0.2.4.2-alpha.
25463 - Switch weighted node selection rule from using a list of doubles
25464 to using a list of int64_t. This change should make the process
25465 slightly easier to debug and maintain. Needed to finish ticket 6538.
25467 o Code simplification and refactoring:
25468 - Move the generic "config" code into a new file, and have "config.c"
25469 hold only torrc- and state-related code. Resolves ticket 6823.
25470 - Move the core of our "choose a weighted element at random" logic
25471 into its own function, and give it unit tests. Now the logic is
25472 testable, and a little less fragile too.
25473 - Removed the testing_since field of node_t, which hasn't been used
25474 for anything since 0.2.0.9-alpha.
25476 o Documentation fixes:
25477 - Clarify that hidden services are TCP only. Fixes bug 6024.
25478 - Resolve a typo in torrc.sample.in. Fixes bug 6819; bugfix on
25482 Changes in version 0.2.3.22-rc - 2012-09-11
25483 Tor 0.2.3.22-rc fixes another opportunity for a remotely triggerable
25487 - Fix an assertion failure in tor_timegm() that could be triggered
25488 by a badly formatted directory object. Bug found by fuzzing with
25489 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
25492 - Avoid segfault when starting up having run with an extremely old
25493 version of Tor and parsing its state file. Fixes bug 6801; bugfix
25497 Changes in version 0.2.2.39 - 2012-09-11
25498 Tor 0.2.2.39 fixes two more opportunities for remotely triggerable
25502 - Fix an assertion failure in tor_timegm() that could be triggered
25503 by a badly formatted directory object. Bug found by fuzzing with
25504 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
25505 - Do not crash when comparing an address with port value 0 to an
25506 address policy. This bug could have been used to cause a remote
25507 assertion failure by or against directory authorities, or to
25508 allow some applications to crash clients. Fixes bug 6690; bugfix
25512 Changes in version 0.2.4.2-alpha - 2012-09-10
25513 Tor 0.2.4.2-alpha enables port forwarding for pluggable transports,
25514 raises the default rate limiting even more, and makes the bootstrapping
25515 log messages less noisy.
25518 - Automatically forward the TCP ports of pluggable transport
25519 proxies using tor-fw-helper if PortForwarding is enabled. Implements
25523 - Raise the default BandwidthRate/BandwidthBurst values from 5MB/10MB
25524 to 1GB/1GB. The previous defaults were intended to be "basically
25525 infinite", but it turns out they're now limiting our 100mbit+
25526 relays and bridges. Fixes bug 6605; bugfix on 0.2.0.10-alpha (the
25527 last time we raised it).
25530 - Detect when we're running with a version of OpenSSL other than the
25531 one we compiled with. This has occasionally given people hard-to-
25533 - Log fewer lines at level "notice" about our OpenSSL and Libevent
25534 versions and capabilities when everything is going right. Resolves
25535 part of ticket 6736.
25536 - Directory authorities no long accept descriptors for any version of
25537 Tor before 0.2.2.35, or for any 0.2.3 release before 0.2.3.10-alpha.
25538 These versions are insecure, unsupported, or both. Implements
25542 - Rename the (internal-use-only) UsingTestingNetworkDefaults option
25543 to start with a triple-underscore so the controller won't touch it.
25544 Patch by Meejah. Fixes bug 3155. Bugfix on 0.2.2.23-alpha.
25545 - Avoid segfault when starting up having run with an extremely old
25546 version of Tor and parsing its state file. Fixes bug 6801; bugfix
25548 - Rename the (testing-use-only) _UseFilteringSSLBufferevents option
25549 so it doesn't start with _. Fixes bug 3155. Bugfix on 0.2.3.1-alpha.
25550 - Don't follow the NULL pointer if microdescriptor generation fails.
25551 (This does not appear to be triggerable, but it's best to be safe.)
25552 Found by "f. tp.". Fixes bug 6797; bugfix on 0.2.4.1-alpha.
25553 - Fix mis-declared dependencies on src/common/crypto.c and
25554 src/or/tor_main.c that could break out-of-tree builds under some
25555 circumstances. Fixes bug 6778; bugfix on 0.2.4.1-alpha.
25556 - Avoid a warning when building common_sha1.i out of tree. Fixes bug
25557 6778; bugfix on 0.2.4.1-alpha.
25558 - Fix a harmless (in this case) build warning for implicitly
25559 converting a strlen() to an int. Bugfix on 0.2.4.1-alpha.
25561 o Removed features:
25562 - Now that all versions before 0.2.2.x are disallowed, we no longer
25563 need to work around their missing features. Thus we can remove a
25564 bunch of compatibility code.
25566 o Code refactoring:
25567 - Tweak tor-fw-helper to accept an arbitrary amount of arbitrary
25568 TCP ports to forward. In the past it only accepted two ports:
25569 the ORPort and the DirPort.
25572 Changes in version 0.2.4.1-alpha - 2012-09-05
25573 Tor 0.2.4.1-alpha lets bridges publish their pluggable transports to
25574 bridgedb; lets relays use IPv6 addresses and directory authorities
25575 advertise them; and switches to a cleaner build interface.
25577 This is the first alpha release in a new series, so expect there to
25578 be bugs. Users who would rather test out a more stable branch should
25579 stay with 0.2.3.x for now.
25581 o Major features (bridges):
25582 - Bridges now report the pluggable transports they support to the
25583 bridge authority, so it can pass the supported transports on to
25584 bridgedb and/or eventually do reachability testing. Implements
25587 o Major features (IPv6):
25588 - Bridge authorities now accept IPv6 bridge addresses and include
25589 them in network status documents. Implements ticket 5534.
25590 - Clients who set "ClientUseIPv6 1" may connect to entry nodes over
25591 IPv6. Set "ClientPreferIPv6ORPort 1" to make this even more likely
25592 to happen. Implements ticket 5535.
25593 - All kind of relays, not just bridges, can now advertise an IPv6
25594 OR port. Implements ticket 6362.
25595 - Directory authorities vote on IPv6 OR ports using the new consensus
25596 method 14. Implements ticket 6363.
25598 o Major features (build):
25599 - Switch to a nonrecursive Makefile structure. Now instead of each
25600 Makefile.am invoking other Makefile.am's, there is a master
25601 Makefile.am that includes the others. This change makes our build
25602 process slightly more maintainable, and improves parallelism for
25603 building with make -j. Original patch by Stewart Smith; various
25604 fixes by Jim Meyering.
25605 - Where available, we now use automake's "silent" make rules by
25606 default, so that warnings are easier to spot. You can get the old
25607 behavior with "make V=1". Patch by Stewart Smith for ticket 6522.
25609 o Minor features (code security and spec conformance):
25610 - Clear keys and key-derived material left on the stack in
25611 rendservice.c and rendclient.c. Check return value of
25612 crypto_pk_write_private_key_to_string() in rend_service_load_keys().
25613 These fixes should make us more forward-secure against cold-boot
25614 attacks and the like. Fixes bug 2385.
25615 - Reject EXTEND cells sent to nonexistent streams. According to the
25616 spec, an EXTEND cell sent to _any_ nonzero stream ID is invalid, but
25617 we were only checking for stream IDs that were currently in use.
25618 Found while hunting for more instances of bug 6271. Bugfix on
25619 0.0.2pre8, which introduced incremental circuit construction.
25621 o Minor features (streamlining);
25622 - No longer include the "opt" prefix when generating routerinfos
25623 or v2 directories: it has been needless since Tor 0.1.2. Closes
25625 - Remove some now-needless code that tried to aggressively flush
25626 OR connections as data was added to them. Since 0.2.0.1-alpha, our
25627 cell queue logic has saved us from the failure mode that this code
25628 was supposed to prevent. Removing this code will limit the number
25629 of baroque control flow paths through Tor's network logic. Reported
25630 pseudonymously on IRC. Fixes bug 6468; bugfix on 0.2.0.1-alpha.
25632 o Minor features (controller):
25633 - Add a "GETINFO signal/names" control port command. Implements
25635 - Provide default values for all options via "GETINFO config/defaults".
25636 Implements ticket 4971.
25638 o Minor features (IPv6):
25639 - New config option "AuthDirHasIPv6Connectivity 1" that directory
25640 authorities should set if they have IPv6 connectivity and want to
25641 do reachability tests for IPv6 relays. Implements feature 5974.
25642 - A relay with an IPv6 OR port now sends that address in NETINFO
25643 cells (in addition to its other address). Implements ticket 6364.
25645 o Minor features (log messages):
25646 - Omit the first heartbeat log message, because it never has anything
25647 useful to say, and it clutters up the bootstrapping messages.
25648 Resolves ticket 6758.
25649 - Don't log about reloading the microdescriptor cache at startup. Our
25650 bootstrap warnings are supposed to tell the user when there's a
25651 problem, and our bootstrap notices say when there isn't. Resolves
25652 ticket 6759; bugfix on 0.2.2.6-alpha.
25653 - Don't log "I learned some more directory information" when we're
25654 reading cached directory information. Reserve it for when new
25655 directory information arrives in response to a fetch. Resolves
25657 - Prevent rounding error in path bias counts when scaling
25658 them down, and use the correct scale factor default. Also demote
25659 some path bias related log messages down a level and make others
25660 less scary sounding. Fixes bug 6647. Bugfix against 0.2.3.17-beta.
25661 - We no longer warn so much when generating manpages from their
25664 o Code simplifications and refactoring:
25665 - Enhance our internal sscanf replacement so that we can eliminate
25666 the last remaining uses of the system sscanf. (Though those uses
25667 of sscanf were safe, sscanf itself is generally error prone, so
25668 we want to eliminate when we can.) Fixes ticket 4195 and Coverity
25670 - Move ipv6_preferred from routerinfo_t to node_t. Addresses bug 4620.
25671 - Move last_reachable and testing_since from routerinfo_t to node_t.
25672 Implements ticket 5529.
25673 - Add replaycache_t structure, functions and unit tests, then refactor
25674 rend_service_introduce() to be more clear to read, improve, debug,
25675 and test. Resolves bug 6177.
25676 - Finally remove support for malloc_good_size and malloc_usable_size.
25677 We had hoped that these functions would let us eke a little more
25678 memory out of our malloc implementation. Unfortunately, the only
25679 implementations that provided these functions are also ones that
25680 are already efficient about not overallocation: they never got us
25681 more than 7 or so bytes per allocation. Removing them saves us a
25682 little code complexity and a nontrivial amount of build complexity.
25684 o New requirements:
25685 - Tor maintainers now require Automake version 1.9 or later to build
25686 Tor from the Git repository. (Automake is not required when building
25687 from a source distribution.)
25690 Changes in version 0.2.3.21-rc - 2012-09-05
25691 Tor 0.2.3.21-rc is the fourth release candidate for the Tor 0.2.3.x
25692 series. It fixes a trio of potential security bugs, fixes a bug where
25693 we were leaving some of the fast relays out of the microdescriptor
25694 consensus, resumes interpreting "ORPort 0" and "DirPort 0" correctly,
25695 and cleans up other smaller issues.
25697 o Major bugfixes (security):
25698 - Tear down the circuit if we get an unexpected SENDME cell. Clients
25699 could use this trick to make their circuits receive cells faster
25700 than our flow control would have allowed, or to gum up the network,
25701 or possibly to do targeted memory denial-of-service attacks on
25702 entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor --
25703 from July 2002, before the release of Tor 0.0.0. We had committed
25704 this patch previously, but we had to revert it because of bug 6271.
25705 Now that 6271 is fixed, this patch appears to work.
25706 - Reject any attempt to extend to an internal address. Without
25707 this fix, a router could be used to probe addresses on an internal
25708 network to see whether they were accepting connections. Fixes bug
25709 6710; bugfix on 0.0.8pre1.
25710 - Do not crash when comparing an address with port value 0 to an
25711 address policy. This bug could have been used to cause a remote
25712 assertion failure by or against directory authorities, or to
25713 allow some applications to crash clients. Fixes bug 6690; bugfix
25717 - Remove the upper bound on microdescriptor length. We were hitting
25718 the limit for routers with complex exit policies or family
25719 declarations, causing clients to not use them. Fixes the first
25720 piece of bug 6404; fix on 0.2.2.6-alpha.
25721 - Detect "ORPort 0" as meaning, uniformly, that we're not running
25722 as a relay. Previously, some of our code would treat the presence
25723 of any ORPort line as meaning that we should act like a relay,
25724 even though our new listener code would correctly not open any
25725 ORPorts for ORPort 0. Similar bugs in other Port options are also
25726 fixed. Fixes the first half of bug 6507; bugfix on 0.2.3.3-alpha.
25729 - Avoid a pair of double-free and use-after-mark bugs that can
25730 occur with certain timings in canceled and re-received DNS
25731 requests. Fixes bug 6472; bugfix on 0.0.7rc1.
25732 - Fix build and 64-bit compile warnings from --enable-openbsd-malloc.
25733 Fixes bug 6379. Bugfix on 0.2.0.20-rc.
25734 - Allow one-hop directory fetching circuits the full "circuit build
25735 timeout" period, rather than just half of it, before failing them
25736 and marking the relay down. This fix should help reduce cases where
25737 clients declare relays (or worse, bridges) unreachable because
25738 the TLS handshake takes a few seconds to complete. Fixes bug 6743;
25739 bugfix on 0.2.2.2-alpha, where we changed the timeout from a static
25741 - Authorities no longer include any router in their microdescriptor
25742 consensuses for which they couldn't generate or agree on a
25743 microdescriptor. Fixes the second piece of bug 6404; fix on
25745 - Detect and reject attempts to specify both "FooPort" and
25746 "FooPort 0" in the same configuration domain. (It's still okay
25747 to have a FooPort in your configuration file, and use "FooPort 0"
25748 on the command line to disable it.) Fixes the second half of bug
25749 6507; bugfix on 0.2.3.3-alpha.
25750 - Make wildcarded addresses (that is, ones beginning with "*.") work
25751 when provided via the controller's MapAddress command. Previously,
25752 they were accepted, but we never actually noticed that they were
25753 wildcards. Fixes bug 6244; bugfix on 0.2.3.9-alpha.
25754 - Avoid crashing on a malformed state file where EntryGuardPathBias
25755 precedes EntryGuard. Fix for bug 6774; bugfix on 0.2.3.17-beta.
25756 - Add a (probably redundant) memory clear between iterations of
25757 the router status voting loop, to prevent future coding errors
25758 where data might leak between iterations of the loop. Resolves
25761 o Minor bugfixes (log messages):
25762 - Downgrade "set buildtimeout to low value" messages to "info"
25763 severity; they were never an actual problem, there was never
25764 anything reasonable to do about them, and they tended to spam logs
25765 from time to time. Fixes bug 6251; bugfix on 0.2.2.2-alpha.
25766 - Downgrade path-bias warning messages to "info". We'll try to get
25767 them working better in 0.2.4. Add internal circuit construction
25768 state to protect against the noisy warn message "Unexpectedly high
25769 circuit_successes". Also add some additional rate-limited notice
25770 messages to help determine the root cause of the warn. Fixes bug
25771 6475. Bugfix against 0.2.3.17-beta.
25772 - Move log message when unable to find a microdesc in a routerstatus
25773 entry to parse time. Previously we'd spam this warning every time
25774 we tried to figure out which microdescriptors to download. Fixes
25775 the third piece of bug 6404; fix on 0.2.3.18-rc.
25778 - Consider new, removed or changed IPv6 OR ports a non-cosmetic
25779 change when the authority is deciding whether to accept a newly
25780 uploaded descriptor. Implements ticket 6423.
25781 - Add missing documentation for consensus and microdesc files.
25782 Resolves ticket 6732.
25785 Changes in version 0.2.2.38 - 2012-08-12
25786 Tor 0.2.2.38 fixes a remotely triggerable crash bug, and fixes a timing
25787 attack that could in theory leak path information.
25790 - Avoid an uninitialized memory read when reading a vote or consensus
25791 document that has an unrecognized flavor name. This read could
25792 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
25793 - Try to leak less information about what relays a client is
25794 choosing to a side-channel attacker. Previously, a Tor client would
25795 stop iterating through the list of available relays as soon as it
25796 had chosen one, thus finishing a little earlier when it picked
25797 a router earlier in the list. If an attacker can recover this
25798 timing information (nontrivial but not proven to be impossible),
25799 they could learn some coarse-grained information about which relays
25800 a client was picking (middle nodes in particular are likelier to
25801 be affected than exits). The timing attack might be mitigated by
25802 other factors (see bug 6537 for some discussion), but it's best
25803 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
25806 Changes in version 0.2.3.20-rc - 2012-08-05
25807 Tor 0.2.3.20-rc is the third release candidate for the Tor 0.2.3.x
25808 series. It fixes a pair of code security bugs and a potential anonymity
25809 issue, updates our RPM spec files, and cleans up other smaller issues.
25812 - Avoid read-from-freed-memory and double-free bugs that could occur
25813 when a DNS request fails while launching it. Fixes bug 6480;
25814 bugfix on 0.2.0.1-alpha.
25815 - Avoid an uninitialized memory read when reading a vote or consensus
25816 document that has an unrecognized flavor name. This read could
25817 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
25818 - Try to leak less information about what relays a client is
25819 choosing to a side-channel attacker. Previously, a Tor client would
25820 stop iterating through the list of available relays as soon as it
25821 had chosen one, thus finishing a little earlier when it picked
25822 a router earlier in the list. If an attacker can recover this
25823 timing information (nontrivial but not proven to be impossible),
25824 they could learn some coarse-grained information about which relays
25825 a client was picking (middle nodes in particular are likelier to
25826 be affected than exits). The timing attack might be mitigated by
25827 other factors (see bug 6537 for some discussion), but it's best
25828 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
25831 - Try to make the warning when giving an obsolete SOCKSListenAddress
25832 a little more useful.
25833 - Terminate active server managed proxies if Tor stops being a
25834 relay. Addresses parts of bug 6274; bugfix on 0.2.3.6-alpha.
25835 - Provide a better error message about possible OSX Asciidoc failure
25836 reasons. Fixes bug 6436.
25837 - Warn when Tor is configured to use accounting in a way that can
25838 link a hidden service to some other hidden service or public
25839 address. Resolves ticket 6490.
25842 - Check return value of fputs() when writing authority certificate
25843 file. Fixes Coverity issue 709056; bugfix on 0.2.0.1-alpha.
25844 - Ignore ServerTransportPlugin lines when Tor is not configured as
25845 a relay. Fixes bug 6274; bugfix on 0.2.3.6-alpha.
25846 - When disabling guards for having too high a proportion of failed
25847 circuits, make sure to look at each guard. Fixes bug 6397; bugfix
25851 - Update our default RPM spec files to work with mock and rpmbuild
25852 on RHEL/Fedora. They have an updated set of dependencies and
25853 conflicts, a fix for an ancient typo when creating the "_tor"
25854 user, and better instructions. Thanks to Ondrej Mikle for the
25855 patch series. Fixes bug 6043.
25858 - Make it possible to set the TestingTorNetwork configuration
25859 option using AlternateDirAuthority and AlternateBridgeAuthority
25860 as an alternative to setting DirServer. Addresses ticket 6377.
25863 - Clarify the documentation for the Alternate*Authority options.
25865 - Fix some typos in the manpages. Patch from A. Costa. Fixes bug 6500.
25867 o Code simplification and refactoring:
25868 - Do not use SMARTLIST_FOREACH for any loop whose body exceeds
25869 10 lines. Also, don't nest them. Doing so in the past has
25870 led to hard-to-debug code. The new style is to use the
25871 SMARTLIST_FOREACH_{BEGIN,END} pair. Addresses issue 6400.
25874 Changes in version 0.2.3.19-rc - 2012-07-06
25875 Tor 0.2.3.19-rc is the second release candidate for the Tor 0.2.3.x
25876 series. It fixes the compile on Windows, reverts to a GeoIP database
25877 that isn't as broken, and fixes a flow control bug that has been around
25878 since the beginning of Tor.
25881 - Fix a bug handling SENDME cells on nonexistent streams that could
25882 result in bizarre window values. Report and patch contributed
25883 pseudonymously. Fixes part of bug 6271. This bug was introduced
25884 before the first Tor release, in svn commit r152.
25885 - Revert to the May 1 2012 Maxmind GeoLite Country database. In the
25886 June 2012 database, Maxmind marked many Tor relays as country "A1",
25887 which will cause risky behavior for clients that set EntryNodes
25888 or ExitNodes. Addresses bug 6334; bugfix on 0.2.3.17-beta.
25889 - Instead of ENOBUFS on Windows, say WSAENOBUFS. Fixes compilation
25890 on Windows. Fixes bug 6296; bugfix on 0.2.3.18-rc.
25893 - Fix wrong TCP port range in parse_port_range(). Fixes bug 6218;
25894 bugfix on 0.2.1.10-alpha.
25897 Changes in version 0.2.3.18-rc - 2012-06-28
25898 Tor 0.2.3.18-rc is the first release candidate for the Tor 0.2.3.x
25899 series. It fixes a few smaller bugs, but generally appears stable.
25900 Please test it and let us know whether it is!
25903 - Allow wildcarded mapaddress targets to be specified on the
25904 controlport. Partially fixes bug 6244; bugfix on 0.2.3.9-alpha.
25905 - Make our linker option detection code more robust against linkers
25906 such as on FreeBSD 8, where a bad combination of options completes
25907 successfully but makes an unrunnable binary. Fixes bug 6173;
25908 bugfix on 0.2.3.17-beta.
25910 o Minor bugfixes (on 0.2.2.x and earlier):
25911 - Avoid a false positive in the util/threads unit test by increasing
25912 the maximum timeout time. Fixes bug 6227; bugfix on 0.2.0.4-alpha.
25913 - Replace "Sending publish request" log messages with "Launching
25914 upload", so that they no longer confusingly imply that we're
25915 sending something to a directory we might not even be connected
25916 to yet. Fixes bug 3311; bugfix on 0.2.0.10-alpha.
25917 - Make sure to set *socket_error in all error cases in
25918 connection_connect(), so it can't produce a warning about
25919 errno being zero from errno_to_orconn_end_reason(). Bugfix on
25920 0.2.1.1-alpha; resolves ticket 6028.
25921 - Downgrade "Got a certificate, but we already have it" log messages
25922 from warning to info, except when we're a dirauth. Fixes bug 5238;
25923 bugfix on 0.2.1.7-alpha.
25924 - When checking for requested signatures on the latest consensus
25925 before serving it to a client, make sure to check the right
25926 consensus flavor. Bugfix on 0.2.2.6-alpha.
25927 - Downgrade "eventdns rejected address" message to LOG_PROTOCOL_WARN.
25928 Fixes bug 5932; bugfix on 0.2.2.7-alpha.
25930 o Minor bugfixes (on 0.2.3.x):
25931 - Make format_helper_exit_status() avoid unnecessary space padding
25932 and stop confusing log_from_pipe(). Fixes ticket 5557; bugfix
25934 - Downgrade a message about cleaning the microdescriptor cache to
25935 "info" from "notice". Fixes bug 6238; bugfix on 0.2.3.1-alpha.
25936 - Log a BUG message at severity INFO if we have a networkstatus with
25937 a missing entry for some microdescriptor. Continues on a patch
25939 - Improve the log message when a managed proxy fails to launch. Fixes
25940 bug 5099; bugfix on 0.2.3.6-alpha.
25941 - Don't do DNS lookups when parsing corrupted managed proxy protocol
25942 messages. Fixes bug 6226; bugfix on 0.2.3.6-alpha.
25943 - When formatting wildcarded address mappings for the controller,
25944 be sure to include "*." as appropriate. Partially fixes bug 6244;
25945 bugfix on 0.2.3.9-alpha.
25946 - Avoid a warning caused by using strcspn() from glibc with clang 3.0.
25947 Bugfix on 0.2.3.13-alpha.
25948 - Stop logging messages about running with circuit timeout learning
25949 enabled at severity LD_BUG. Fixes bug 6169; bugfix on 0.2.3.17-beta.
25950 - Disable a spurious warning about reading on a marked and flushing
25951 connection. We shouldn't be doing that, but apparently we
25952 sometimes do. Fixes bug 6203; bugfix on 0.2.3.17-beta.
25953 - Fix a bug that stopped AllowDotExit from working on addresses
25954 that had an entry in the DNS cache. Fixes bug 6211; bugfix on
25957 o Code simplification, refactoring, unit tests:
25958 - Move tor_gettimeofday_cached() into compat_libevent.c, and use
25959 Libevent's notion of cached time when possible.
25960 - Remove duplicate code for invoking getrlimit() from control.c.
25961 - Add a unit test for the environment_variable_names_equal function.
25964 - Document the --defaults-torrc option, and the new (in 0.2.3)
25965 semantics for overriding, extending, and clearing lists of
25966 options. Closes bug 4748.
25969 Changes in version 0.2.3.17-beta - 2012-06-15
25970 Tor 0.2.3.17-beta enables compiler and linker hardening by default,
25971 gets our TLS handshake back on track for being able to blend in with
25972 Firefox, fixes a big bug in 0.2.3.16-alpha that broke Tor's interaction
25973 with Vidalia, and otherwise continues to get us closer to a release
25977 - Enable gcc and ld hardening by default. Resolves ticket 5210.
25978 - Update TLS cipher list to match Firefox 8 and later. Resolves
25980 - Implement the client side of proposal 198: remove support for
25981 clients falsely claiming to support standard ciphersuites that
25982 they can actually provide. As of modern OpenSSL versions, it's not
25983 necessary to fake any standard ciphersuite, and doing so prevents
25984 us from using better ciphersuites in the future, since servers
25985 can't know whether an advertised ciphersuite is really supported or
25986 not. Some hosts -- notably, ones with very old versions of OpenSSL
25987 or where OpenSSL has been built with ECC disabled -- will stand
25988 out because of this change; TBB users should not be affected.
25991 - Change the default value for DynamicDHGroups (introduced in
25992 0.2.3.9-alpha) to 0. This feature can make Tor relays less
25993 identifiable by their use of the mod_ssl DH group, but at
25994 the cost of some usability (#4721) and bridge tracing (#6087)
25995 regressions. Resolves ticket 5598.
25996 - Send a CRLF at the end of each STATUS_* control protocol event. This
25997 bug tickled a bug in Vidalia which would make it freeze. Fixes
25998 bug 6094; bugfix on 0.2.3.16-alpha.
26001 - Disable writing on marked-for-close connections when they are
26002 blocked on bandwidth, to prevent busy-looping in Libevent. Fixes
26003 bug 5263; bugfix on 0.0.2pre13, where we first added a special
26004 case for flushing marked connections.
26005 - Detect SSL handshake even when the initial attempt to write the
26006 server hello fails. Fixes bug 4592; bugfix on 0.2.0.13-alpha.
26007 - Change the AllowDotExit rules so they should actually work.
26008 We now enforce AllowDotExit only immediately after receiving an
26009 address via SOCKS or DNSPort: other sources are free to provide
26010 .exit addresses after the resolution occurs. Fixes bug 3940;
26011 bugfix on 0.2.2.1-alpha.
26012 - Fix a (harmless) integer overflow in cell statistics reported by
26013 some fast relays. Fixes bug 5849; bugfix on 0.2.2.1-alpha.
26014 - Make sure circuitbuild.c checks LearnCircuitBuildTimeout in all the
26015 right places and never depends on the consensus parameters or
26016 computes adaptive timeouts when it is disabled. Fixes bug 5049;
26017 bugfix on 0.2.2.14-alpha.
26018 - When building Tor on Windows with -DUNICODE (not default), ensure
26019 that error messages, filenames, and DNS server names are always
26020 NUL-terminated when we convert them to a single-byte encoding.
26021 Fixes bug 5909; bugfix on 0.2.2.16-alpha.
26022 - Make Tor build correctly again with -DUNICODE -D_UNICODE defined.
26023 Fixes bug 6097; bugfix on 0.2.2.16-alpha.
26024 - Fix an edge case where TestingTorNetwork is set but the authorities
26025 and relays all have an uptime of zero, where the private Tor network
26026 could briefly lack support for hidden services. Fixes bug 3886;
26027 bugfix on 0.2.2.18-alpha.
26028 - Correct the manpage's descriptions for the default values of
26029 DirReqStatistics and ExtraInfoStatistics. Fixes bug 2865; bugfix
26031 - Fix the documentation for the --hush and --quiet command line
26032 options, which changed their behavior back in 0.2.3.3-alpha.
26033 - Fix compilation warning with clang 3.1. Fixes bug 6141; bugfix on
26037 - Rate-limit the "Weighted bandwidth is 0.000000" message, and add
26038 more information to it, so that we can track it down in case it
26039 returns again. Mitigates bug 5235.
26040 - Check CircuitBuildTimeout and LearnCircuitBuildTimeout in
26041 options_validate(); warn if LearnCircuitBuildTimeout is disabled and
26042 CircuitBuildTimeout is set unreasonably low. Resolves ticket 5452.
26043 - Warn the user when HTTPProxy, but no other proxy type, is
26044 configured. This can cause surprising behavior: it doesn't send
26045 all of Tor's traffic over the HTTPProxy -- it sends unencrypted
26046 directory traffic only. Resolves ticket 4663.
26047 - Issue a notice if a guard completes less than 40% of your circuits.
26048 Threshold is configurable by torrc option PathBiasNoticeRate and
26049 consensus parameter pb_noticepct. There is additional, off-by-
26050 default code to disable guards which fail too many circuits.
26051 Addresses ticket 5458.
26052 - Update to the June 6 2012 Maxmind GeoLite Country database.
26054 o Code simplifications and refactoring:
26055 - Remove validate_pluggable_transports_config(): its warning
26056 message is now handled by connection_or_connect().
26059 Changes in version 0.2.2.37 - 2012-06-06
26060 Tor 0.2.2.37 introduces a workaround for a critical renegotiation
26061 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
26065 - Work around a bug in OpenSSL that broke renegotiation with TLS
26066 1.1 and TLS 1.2. Without this workaround, all attempts to speak
26067 the v2 Tor connection protocol when both sides were using OpenSSL
26068 1.0.1 would fail. Resolves ticket 6033.
26069 - When waiting for a client to renegotiate, don't allow it to add
26070 any bytes to the input buffer. This fixes a potential DoS issue.
26071 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
26072 - Fix an edge case where if we fetch or publish a hidden service
26073 descriptor, we might build a 4-hop circuit and then use that circuit
26074 for exiting afterwards -- even if the new last hop doesn't obey our
26075 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
26078 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
26079 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
26082 - Tell GCC and Clang to check for any errors in format strings passed
26083 to the tor_v*(print|scan)f functions.
26086 Changes in version 0.2.3.16-alpha - 2012-06-05
26087 Tor 0.2.3.16-alpha introduces a workaround for a critical renegotiation
26088 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
26089 currently). It also fixes a variety of smaller bugs and other cleanups
26090 that get us closer to a release candidate.
26092 o Major bugfixes (general):
26093 - Work around a bug in OpenSSL that broke renegotiation with TLS
26094 1.1 and TLS 1.2. Without this workaround, all attempts to speak
26095 the v2 Tor connection protocol when both sides were using OpenSSL
26096 1.0.1 would fail. Resolves ticket 6033.
26097 - When waiting for a client to renegotiate, don't allow it to add
26098 any bytes to the input buffer. This fixes a potential DoS issue.
26099 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
26100 - Pass correct OR address to managed proxies (like obfsproxy),
26101 even when ORListenAddress is used. Fixes bug 4865; bugfix on
26103 - The advertised platform of a router now includes only its operating
26104 system's name (e.g., "Linux", "Darwin", "Windows 7"), and not its
26105 service pack level (for Windows) or its CPU architecture (for Unix).
26106 We also no longer include the "git-XYZ" tag in the version. Resolves
26109 o Major bugfixes (clients):
26110 - If we are unable to find any exit that supports our predicted ports,
26111 stop calling them predicted, so that we don't loop and build
26112 hopeless circuits indefinitely. Fixes bug 3296; bugfix on 0.0.9pre6,
26113 which introduced predicted ports.
26114 - Fix an edge case where if we fetch or publish a hidden service
26115 descriptor, we might build a 4-hop circuit and then use that circuit
26116 for exiting afterwards -- even if the new last hop doesn't obey our
26117 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
26118 - Check at each new consensus whether our entry guards were picked
26119 long enough ago that we should rotate them. Previously, we only
26120 did this check at startup, which could lead to us holding a guard
26121 indefinitely. Fixes bug 5380; bugfix on 0.2.1.14-rc.
26122 - When fetching a bridge descriptor from a bridge authority,
26123 always do so anonymously, whether we have been able to open
26124 circuits or not. Partial fix for bug 1938; bugfix on 0.2.0.7-alpha.
26125 This behavior makes it *safer* to use UpdateBridgesFromAuthority,
26126 but we'll need to wait for bug 6010 before it's actually usable.
26128 o Major bugfixes (directory authorities):
26129 - When computing weight parameters, behave more robustly in the
26130 presence of a bad bwweightscale value. Previously, the authorities
26131 would crash if they agreed on a sufficiently broken weight_scale
26132 value: now, they use a reasonable default and carry on. Partial
26133 fix for 5786; bugfix on 0.2.2.17-alpha.
26134 - Check more thoroughly to prevent a rogue authority from
26135 double-voting on any consensus directory parameter. Previously,
26136 authorities would crash in this case if the total number of
26137 votes for any parameter exceeded the number of active voters,
26138 but would let it pass otherwise. Partial fix for bug 5786; bugfix
26142 - Rate-limit log messages when asked to connect anonymously to
26143 a private address. When these hit, they tended to hit fast and
26144 often. Also, don't bother trying to connect to addresses that we
26145 are sure will resolve to 127.0.0.1: getting 127.0.0.1 in a directory
26146 reply makes us think we have been lied to, even when the address the
26147 client tried to connect to was "localhost." Resolves ticket 2822.
26148 - Allow packagers to insert an extra string in server descriptor
26149 platform lines by setting the preprocessor variable TOR_BUILD_TAG.
26150 Resolves the rest of ticket 2988.
26151 - Raise the threshold of server descriptors needed (75%) and exit
26152 server descriptors needed (50%) before we will declare ourselves
26153 bootstrapped. This will make clients start building circuits a
26154 little later, but makes the initially constructed circuits less
26155 skewed and less in conflict with further directory fetches. Fixes
26157 - Close any connection that sends unrecognized junk before the
26158 handshake. Solves an issue noted in bug 4369.
26159 - Improve log messages about managed transports. Resolves ticket 5070.
26160 - Tag a bridge's descriptor as "never to be sent unencrypted".
26161 This shouldn't matter, since bridges don't open non-anonymous
26162 connections to the bridge authority and don't allow unencrypted
26163 directory connections from clients, but we might as well make
26164 sure. Closes bug 5139.
26165 - Expose our view of whether we have gone dormant to the controller,
26166 via a new "GETINFO dormant" value. Torbutton and other controllers
26167 can use this to avoid doing periodic requests through Tor while
26168 it's dormant (bug 4718). Fixes bug 5954.
26169 - Tell GCC and Clang to check for any errors in format strings passed
26170 to the tor_v*(print|scan)f functions.
26171 - Update to the May 1 2012 Maxmind GeoLite Country database.
26173 o Minor bugfixes (already included in 0.2.2.36):
26174 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
26175 Fixes bug 5346; bugfix on 0.0.8pre3.
26176 - Correct parsing of certain date types in parse_http_time().
26177 Without this patch, If-Modified-Since would behave
26178 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
26179 Esteban Manchado Velázques.
26180 - Make our number-parsing functions always treat too-large values
26181 as an error, even when those values exceed the width of the
26182 underlying type. Previously, if the caller provided these
26183 functions with minima or maxima set to the extreme values of the
26184 underlying integer type, these functions would return those
26185 values on overflow rather than treating overflow as an error.
26186 Fixes part of bug 5786; bugfix on 0.0.9.
26187 - If we hit the error case where routerlist_insert() replaces an
26188 existing (old) server descriptor, make sure to remove that
26189 server descriptor from the old_routers list. Fix related to bug
26190 1776. Bugfix on 0.2.2.18-alpha.
26191 - Clarify the behavior of MaxCircuitDirtiness with hidden service
26192 circuits. Fixes issue 5259.
26194 o Minor bugfixes (coding cleanup, on 0.2.2.x and earlier):
26195 - Prevent a null-pointer dereference when receiving a data cell
26196 for a nonexistent stream when the circuit in question has an
26197 empty deliver window. We don't believe this is triggerable,
26198 since we don't currently allow deliver windows to become empty,
26199 but the logic is tricky enough that it's better to make the code
26200 robust. Fixes bug 5541; bugfix on 0.0.2pre14.
26201 - Fix a memory leak when trying to launch a DNS request when the
26202 network is disabled or the nameservers are unconfigurable. Fixes
26203 bug 5916; bugfix on Tor 0.1.2.1-alpha (for the unconfigurable
26204 nameserver case) and on 0.2.3.9-alpha (for the DisableNetwork case).
26205 - Don't hold a Windows file handle open for every file mapping;
26206 the file mapping handle is sufficient. Fixes bug 5951; bugfix on
26208 - Avoid O(n^2) performance characteristics when parsing a large
26209 extrainfo cache. Fixes bug 5828; bugfix on 0.2.0.1-alpha.
26210 - Format more doubles with %f, not %lf. Patch from grarpamp to make
26211 Tor build correctly on older BSDs again. Fixes bug 3894; bugfix on
26213 - Make our replacement implementation of strtok_r() compatible with
26214 the standard behavior of strtok_r(). Patch by nils. Fixes bug 5091;
26215 bugfix on 0.2.2.1-alpha.
26216 - Fix a NULL-pointer dereference on a badly formed
26217 SETCIRCUITPURPOSE command. Found by mikeyc. Fixes bug 5796;
26218 bugfix on 0.2.2.9-alpha.
26219 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
26220 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
26221 - Defensively refactor rend_mid_rendezvous() so that protocol
26222 violations and length checks happen in the beginning. Fixes
26224 - Set _WIN32_WINNT to 0x0501 consistently throughout the code, so
26225 that IPv6 stuff will compile on MSVC, and compilation issues
26226 will be easier to track down. Fixes bug 5861.
26228 o Minor bugfixes (correctness, on 0.2.2.x and earlier):
26229 - Exit nodes now correctly report EADDRINUSE and EADDRNOTAVAIL as
26230 resource exhaustion, so that clients can adjust their load to
26231 try other exits. Fixes bug 4710; bugfix on 0.1.0.1-rc, which
26232 started using END_STREAM_REASON_RESOURCELIMIT.
26233 - Don't check for whether the address we're using for outbound
26234 connections has changed until after the outbound connection has
26235 completed. On Windows, getsockname() doesn't succeed until the
26236 connection is finished. Fixes bug 5374; bugfix on 0.1.1.14-alpha.
26237 - If the configuration tries to set MyFamily on a bridge, refuse to
26238 do so, and warn about the security implications. Fixes bug 4657;
26239 bugfix on 0.2.0.3-alpha.
26240 - If the client fails to set a reasonable set of ciphersuites
26241 during its v2 handshake renegotiation, allow the renegotiation to
26242 continue nevertheless (i.e. send all the required certificates).
26243 Fixes bug 4591; bugfix on 0.2.0.20-rc.
26244 - When we receive a SIGHUP and the controller __ReloadTorrcOnSIGHUP
26245 option is set to 0 (which Vidalia version 0.2.16 now does when
26246 a SAVECONF attempt fails), perform other actions that SIGHUP
26247 usually causes (like reopening the logs). Fixes bug 5095; bugfix
26249 - If we fail to write a microdescriptor to the disk cache, do not
26250 continue replacing the old microdescriptor file. Fixes bug 2954;
26251 bugfix on 0.2.2.6-alpha.
26252 - Exit nodes don't need to fetch certificates for authorities that
26253 they don't recognize; only directory authorities, bridges,
26254 and caches need to do that. Fixes part of bug 2297; bugfix on
26256 - Correctly handle checking the permissions on the parent
26257 directory of a control socket in the root directory. Bug found
26258 by Esteban Manchado Velázquez. Fixes bug 5089; bugfix on Tor
26260 - When told to add a bridge with the same digest as a preexisting
26261 bridge but a different addr:port, change the addr:port as
26262 requested. Previously we would not notice the change. Fixes half
26263 of bug 5603; fix on 0.2.2.26-beta.
26264 - End AUTHCHALLENGE error messages (in the control protocol) with
26265 a CRLF. Fixes bug 5760; bugfix on 0.2.2.36 and 0.2.3.13-alpha.
26267 o Minor bugfixes (on 0.2.3.x):
26268 - Turn an assertion (that the number of handshakes received as a
26269 server is not < 1) into a warning. Fixes bug 4873; bugfix on
26271 - Format IPv4 addresses correctly in ADDRMAP events. (Previously,
26272 we had reversed them when the answer was cached.) Fixes bug
26273 5723; bugfix on 0.2.3.1-alpha.
26274 - Work correctly on Linux systems with accept4 support advertised in
26275 their headers, but without accept4 support in the kernel. Fix
26276 by murb. Fixes bug 5762; bugfix on 0.2.3.1-alpha.
26277 - When told to add a bridge with the same addr:port as a preexisting
26278 bridge but a different transport, change the transport as
26279 requested. Previously we would not notice the change. Fixes half
26280 of bug 5603; fix on 0.2.3.2-alpha.
26281 - Avoid a "double-reply" warning when replying to a SOCKS request
26282 with a parse error. Patch from Fabian Keil. Fixes bug 4108;
26283 bugfix on 0.2.3.4-alpha.
26284 - Fix a bug where a bridge authority crashes if it has seen no
26285 directory requests when it's time to write statistics to disk.
26286 Fixes bug 5891; bugfix on 0.2.3.6-alpha. Also fixes bug 5508 in
26288 - Don't try to open non-control listeners when DisableNetwork is set.
26289 Previously, we'd open all listeners, then immediately close them.
26290 Fixes bug 5604; bugfix on 0.2.3.9-alpha.
26291 - Don't abort the managed proxy protocol if the managed proxy
26292 sends us an unrecognized line; ignore it instead. Fixes bug
26293 5910; bugfix on 0.2.3.9-alpha.
26294 - Fix a compile warning in crypto.c when compiling with clang 3.1.
26295 Fixes bug 5969, bugfix on 0.2.3.9-alpha.
26296 - Fix a compilation issue on GNU Hurd, which doesn't have PATH_MAX.
26297 Fixes bug 5355; bugfix on 0.2.3.11-alpha.
26298 - Remove bogus definition of "_WIN32" from src/win32/orconfig.h, to
26299 unbreak the MSVC build. Fixes bug 5858; bugfix on 0.2.3.12-alpha.
26300 - Resolve numerous small warnings and build issues with MSVC. Resolves
26303 o Documentation fixes:
26304 - Improve the manual's documentation for the NT Service command-line
26305 options. Addresses ticket 3964.
26306 - Clarify SessionGroup documentation slightly; resolves ticket 5437.
26307 - Document the changes to the ORPort and DirPort options, and the
26308 fact that {OR/Dir}ListenAddress is now unnecessary (and
26309 therefore deprecated). Resolves ticket 5597.
26312 - Remove the torrc.bridge file: we don't use it for anything, and
26313 it had become badly desynchronized from torrc.sample. Resolves
26317 Changes in version 0.2.2.36 - 2012-05-24
26318 Tor 0.2.2.36 updates the addresses for two of the eight directory
26319 authorities, fixes some potential anonymity and security issues,
26320 and fixes several crash bugs.
26322 Tor 0.2.1.x has reached its end-of-life. Those Tor versions have many
26323 known flaws, and nobody should be using them. You should upgrade. If
26324 you're using a Linux or BSD and its packages are obsolete, stop using
26325 those packages and upgrade anyway.
26327 o Directory authority changes:
26328 - Change IP address for maatuska (v3 directory authority).
26329 - Change IP address for ides (v3 directory authority), and rename
26333 - When building or running with any version of OpenSSL earlier
26334 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
26335 versions have a bug (CVE-2011-4576) in which their block cipher
26336 padding includes uninitialized data, potentially leaking sensitive
26337 information to any peer with whom they make a SSLv3 connection. Tor
26338 does not use SSL v3 by default, but a hostile client or server
26339 could force an SSLv3 connection in order to gain information that
26340 they shouldn't have been able to get. The best solution here is to
26341 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
26342 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
26343 to make sure that the bug can't happen.
26344 - Never use a bridge or a controller-supplied node as an exit, even
26345 if its exit policy allows it. Found by wanoskarnet. Fixes bug
26346 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
26347 and 0.2.0.3-alpha (for bridge-purpose descriptors).
26348 - Only build circuits if we have a sufficient threshold of the total
26349 descriptors that are marked in the consensus with the "Exit"
26350 flag. This mitigates an attack proposed by wanoskarnet, in which
26351 all of a client's bridges collude to restrict the exit nodes that
26352 the client knows about. Fixes bug 5343.
26353 - Provide controllers with a safer way to implement the cookie
26354 authentication mechanism. With the old method, if another locally
26355 running program could convince a controller that it was the Tor
26356 process, then that program could trick the controller into telling
26357 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
26358 authentication method uses a challenge-response approach to prevent
26359 this attack. Fixes bug 5185; implements proposal 193.
26362 - Avoid logging uninitialized data when unable to decode a hidden
26363 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
26364 - Avoid a client-side assertion failure when receiving an INTRODUCE2
26365 cell on a general purpose circuit. Fixes bug 5644; bugfix on
26367 - Fix builds when the path to sed, openssl, or sha1sum contains
26368 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
26370 - Correct our replacements for the timeradd() and timersub() functions
26371 on platforms that lack them (for example, Windows). The timersub()
26372 function is used when expiring circuits, while timeradd() is
26373 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
26374 bugfix on 0.2.2.24-alpha.
26375 - Fix the SOCKET_OK test that we use to tell when socket
26376 creation fails so that it works on Win64. Fixes part of bug 4533;
26377 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
26380 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
26381 Fixes bug 5346; bugfix on 0.0.8pre3.
26382 - Make our number-parsing functions always treat too-large values
26383 as an error, even when those values exceed the width of the
26384 underlying type. Previously, if the caller provided these
26385 functions with minima or maxima set to the extreme values of the
26386 underlying integer type, these functions would return those
26387 values on overflow rather than treating overflow as an error.
26388 Fixes part of bug 5786; bugfix on 0.0.9.
26389 - Older Linux kernels erroneously respond to strange nmap behavior
26390 by having accept() return successfully with a zero-length
26391 socket. When this happens, just close the connection. Previously,
26392 we would try harder to learn the remote address: but there was
26393 no such remote address to learn, and our method for trying to
26394 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
26395 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
26396 - Correct parsing of certain date types in parse_http_time().
26397 Without this patch, If-Modified-Since would behave
26398 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
26399 Esteban Manchado Velázques.
26400 - Change the BridgePassword feature (part of the "bridge community"
26401 design, which is not yet implemented) to use a time-independent
26402 comparison. The old behavior might have allowed an adversary
26403 to use timing to guess the BridgePassword value. Fixes bug 5543;
26404 bugfix on 0.2.0.14-alpha.
26405 - Detect and reject certain misformed escape sequences in
26406 configuration values. Previously, these values would cause us
26407 to crash if received in a torrc file or over an authenticated
26408 control port. Bug found by Esteban Manchado Velázquez, and
26409 independently by Robert Connolly from Matta Consulting who further
26410 noted that it allows a post-authentication heap overflow. Patch
26411 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
26412 bugfix on 0.2.0.16-alpha.
26413 - Fix a compile warning when using the --enable-openbsd-malloc
26414 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
26415 - During configure, detect when we're building with clang version
26416 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
26417 CFLAGS. clang doesn't support them yet.
26418 - When sending an HTTP/1.1 proxy request, include a Host header.
26419 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
26420 - Fix a NULL-pointer dereference on a badly formed SETCIRCUITPURPOSE
26421 command. Found by mikeyc. Fixes bug 5796; bugfix on 0.2.2.9-alpha.
26422 - If we hit the error case where routerlist_insert() replaces an
26423 existing (old) server descriptor, make sure to remove that
26424 server descriptor from the old_routers list. Fix related to bug
26425 1776. Bugfix on 0.2.2.18-alpha.
26427 o Minor bugfixes (documentation and log messages):
26428 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
26429 Fixes bug 4856; bugfix on Tor 0.0.6.
26430 - Update "ClientOnly" man page entry to explain that there isn't
26431 really any point to messing with it. Resolves ticket 5005.
26432 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
26433 directory authority option (introduced in Tor 0.2.2.34).
26434 - Downgrade the "We're missing a certificate" message from notice
26435 to info: people kept mistaking it for a real problem, whereas it
26436 is seldom the problem even when we are failing to bootstrap. Fixes
26437 bug 5067; bugfix on 0.2.0.10-alpha.
26438 - Correctly spell "connect" in a log message on failure to create a
26439 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta.
26440 - Clarify the behavior of MaxCircuitDirtiness with hidden service
26441 circuits. Fixes issue 5259.
26444 - Directory authorities now reject versions of Tor older than
26445 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
26446 inclusive. These versions accounted for only a small fraction of
26447 the Tor network, and have numerous known security issues. Resolves
26449 - Update to the May 1 2012 Maxmind GeoLite Country database.
26452 - When sending or relaying a RELAY_EARLY cell, we used to convert
26453 it to a RELAY cell if the connection was using the v1 link
26454 protocol. This was a workaround for older versions of Tor, which
26455 didn't handle RELAY_EARLY cells properly. Now that all supported
26456 versions can handle RELAY_EARLY cells, and now that we're enforcing
26457 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
26458 remove this workaround. Addresses bug 4786.
26461 Changes in version 0.2.3.15-alpha - 2012-04-30
26462 Tor 0.2.3.15-alpha fixes a variety of smaller bugs, including making
26463 the development branch build on Windows again.
26465 o Minor bugfixes (on 0.2.2.x and earlier):
26466 - Make sure that there are no unhandled pending TLS errors before
26467 reading from a TLS stream. We had checks in 0.1.0.3-rc, but
26468 lost them in 0.1.0.5-rc when we refactored read_to_buf_tls().
26469 Bugfix on 0.1.0.5-rc; fixes bug 4528.
26470 - Fix an assert that directory authorities could trigger on sighup
26471 during some configuration state transitions. We now don't treat
26472 it as a fatal error when the new descriptor we just generated in
26473 init_keys() isn't accepted. Fixes bug 4438; bugfix on 0.2.1.9-alpha.
26474 - After we pick a directory mirror, we would refuse to use it if
26475 it's in our ExcludeExitNodes list, resulting in mysterious failures
26476 to bootstrap for people who just wanted to avoid exiting from
26477 certain locations. Fixes bug 5623; bugfix on 0.2.2.25-alpha.
26478 - When building with --enable-static-tor on OpenBSD, do not
26479 erroneously attempt to link -lrt. Fixes bug 5103.
26481 o Minor bugfixes (on 0.2.3.x):
26482 - When Tor is built with kernel headers from a recent (last few
26483 years) Linux kernel, do not fail to run on older (pre-2.6.28
26484 Linux kernels). Fixes bug 5112; bugfix on 0.2.3.1-alpha.
26485 - Fix cross-compilation issues with mingw. Bugfixes on 0.2.3.6-alpha
26486 and 0.2.3.12-alpha.
26487 - Fix compilation with miniupnpc version 1.6; patch from
26488 Anthony G. Basile. Fixes bug 5434; bugfix on 0.2.3.12-alpha.
26489 - Fix compilation with MSVC, which had defined MS_WINDOWS. Bugfix
26490 on 0.2.3.13-alpha; found and fixed by Gisle Vanem.
26491 - Fix compilation on platforms without unistd.h, or where environ
26492 is defined in stdlib.h. Fixes bug 5704; bugfix on 0.2.3.13-alpha.
26495 - Directory authorities are now a little more lenient at accepting
26496 older router descriptors, or newer router descriptors that don't
26497 make big changes. This should help ameliorate past and future
26498 issues where routers think they have uploaded valid descriptors,
26499 but the authorities don't think so. Fix for ticket 2479.
26500 - Make the code that clients use to detect an address change be
26501 IPv6-aware, so that it won't fill clients' logs with error
26502 messages when trying to get the IPv4 address of an IPv6
26503 connection. Implements ticket 5537.
26505 o Removed features:
26506 - Remove the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays option;
26507 authorities needed to use it for a while to keep the network working
26508 as people upgraded to 0.2.1.31, 0.2.2.34, or 0.2.3.6-alpha, but
26509 that was six months ago. As of now, it should no longer be needed
26513 Changes in version 0.2.3.14-alpha - 2012-04-23
26514 Tor 0.2.3.14-alpha fixes yet more bugs to get us closer to a release
26515 candidate. It also dramatically speeds up AES: fast relays should
26516 consider switching to the newer OpenSSL library.
26518 o Directory authority changes:
26519 - Change IP address for ides (v3 directory authority), and rename
26523 - Avoid logging uninitialized data when unable to decode a hidden
26524 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
26525 - Avoid a client-side assertion failure when receiving an INTRODUCE2
26526 cell on a general purpose circuit. Fixes bug 5644; bugfix on
26528 - If authorities are unable to get a v2 consensus document from other
26529 directory authorities, they no longer fall back to fetching
26530 them from regular directory caches. Fixes bug 5635; bugfix on
26531 0.2.2.26-beta, where routers stopped downloading v2 consensus
26532 documents entirely.
26533 - When we start a Tor client with a normal consensus already cached,
26534 be willing to download a microdescriptor consensus. Fixes bug 4011;
26535 fix on 0.2.3.1-alpha.
26537 o Major features (performance):
26538 - When built to use OpenSSL 1.0.1, and built for an x86 or x86_64
26539 instruction set, take advantage of OpenSSL's AESNI, bitsliced, or
26540 vectorized AES implementations as appropriate. These can be much,
26541 much faster than other AES implementations.
26543 o Minor bugfixes (0.2.2.x and earlier):
26544 - Don't launch more than 10 service-side introduction-point circuits
26545 for a hidden service in five minutes. Previously, we would consider
26546 launching more introduction-point circuits if at least one second
26547 had passed without any introduction-point circuits failing. Fixes
26548 bug 4607; bugfix on 0.0.7pre1.
26549 - Change the BridgePassword feature (part of the "bridge community"
26550 design, which is not yet implemented) to use a time-independent
26551 comparison. The old behavior might have allowed an adversary
26552 to use timing to guess the BridgePassword value. Fixes bug 5543;
26553 bugfix on 0.2.0.14-alpha.
26554 - Enforce correct return behavior of tor_vsscanf() when the '%%'
26555 pattern is used. Fixes bug 5558. Bugfix on 0.2.1.13.
26556 - When sending an HTTP/1.1 proxy request, include a Host header.
26557 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
26558 - Don't log that we have "decided to publish new relay descriptor"
26559 unless we are actually publishing a descriptor. Fixes bug 3942;
26560 bugfix on 0.2.2.28-beta.
26562 o Minor bugfixes (0.2.3.x):
26563 - Fix a bug where a bridge authority crashes (on a failed assert)
26564 if it has seen no directory requests when it's time to write
26565 statistics to disk. Fixes bug 5508. Bugfix on 0.2.3.6-alpha.
26566 - Fix bug stomping on ORPort option NoListen and ignoring option
26567 NoAdvertise. Fixes bug 5151; bugfix on 0.2.3.9-alpha.
26568 - In the testsuite, provide a large enough buffer in the tor_sscanf
26569 unit test. Otherwise we'd overrun that buffer and crash during
26570 the unit tests. Found by weasel. Fixes bug 5449; bugfix on
26572 - Make sure we create the keys directory if it doesn't exist and we're
26573 about to store the dynamic Diffie-Hellman parameters. Fixes bug
26574 5572; bugfix on 0.2.3.13-alpha.
26575 - Fix a small memory leak when trying to decode incorrect base16
26576 authenticator during SAFECOOKIE authentication. Found by
26577 Coverity Scan. Fixes CID 507. Bugfix on 0.2.3.13-alpha.
26580 - Add more information to a log statement that might help track down
26581 bug 4091. If you're seeing "Bug: tor_addr_is_internal() called with a
26582 non-IP address" messages (or any Bug messages, for that matter!),
26583 please let us know about it.
26584 - Relays now understand an IPv6 address when they get one from a
26585 directory server. Resolves ticket 4875.
26586 - Resolve IPv6 addresses in bridge and entry statistics to country
26587 code "??" which means we at least count them. Resolves ticket 5053;
26588 improves on 0.2.3.9-alpha.
26589 - Update to the April 3 2012 Maxmind GeoLite Country database.
26590 - Begin a doc/state-contents.txt file to explain the contents of
26591 the Tor state file. Fixes bug 2987.
26593 o Default torrc changes:
26594 - Stop listing "socksport 9050" in torrc.sample. We open a socks
26595 port on 9050 by default anyway, so this should not change anything
26597 - Stop mentioning the deprecated *ListenAddress options in
26598 torrc.sample. Fixes bug 5438.
26599 - Document unit of bandwidth related options in sample torrc.
26602 o Removed features:
26603 - The "torify" script no longer supports the "tsocks" socksifier
26604 tool, since tsocks doesn't support DNS and UDP right for Tor.
26605 Everyone should be using torsocks instead. Fixes bugs 3530 and
26606 5180. Based on a patch by "ugh".
26608 o Code refactoring:
26609 - Change the symmetric cipher interface so that creating and
26610 initializing a stream cipher are no longer separate functions.
26611 - Remove all internal support for unpadded RSA. We never used it, and
26612 it would be a bad idea to start.
26615 Changes in version 0.2.3.13-alpha - 2012-03-26
26616 Tor 0.2.3.13-alpha fixes a variety of stability and correctness bugs
26617 in managed pluggable transports, as well as providing other cleanups
26618 that get us closer to a release candidate.
26620 o Directory authority changes:
26621 - Change IP address for maatuska (v3 directory authority).
26624 - Provide controllers with a safer way to implement the cookie
26625 authentication mechanism. With the old method, if another locally
26626 running program could convince a controller that it was the Tor
26627 process, then that program could trick the controller into telling
26628 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
26629 authentication method uses a challenge-response approach to prevent
26630 this attack. Fixes bug 5185, implements proposal 193.
26631 - Never use a bridge or a controller-supplied node as an exit, even
26632 if its exit policy allows it. Found by wanoskarnet. Fixes bug
26633 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
26634 and 0.2.0.3-alpha (for bridge-purpose descriptors).
26635 - Only build circuits if we have a sufficient threshold of the total
26636 descriptors that are marked in the consensus with the "Exit"
26637 flag. This mitigates an attack proposed by wanoskarnet, in which
26638 all of a client's bridges collude to restrict the exit nodes that
26639 the client knows about. Fixes bug 5343.
26641 o Major bugfixes (on Tor 0.2.3.x):
26642 - Avoid an assert when managed proxies like obfsproxy are configured,
26643 and we receive HUP signals or setconf attempts too rapidly. This
26644 situation happens most commonly when Vidalia tries to attach to
26645 Tor or tries to configure the Tor it's attached to. Fixes bug 5084;
26646 bugfix on 0.2.3.6-alpha.
26647 - Fix a relay-side pluggable transports bug where managed proxies were
26648 unreachable from the Internet, because Tor asked them to bind on
26649 localhost. Fixes bug 4725; bugfix on 0.2.3.9-alpha.
26650 - Stop discarding command-line arguments when TestingTorNetwork
26651 is set. Discovered by Kevin Bauer. Fixes bug 5373; bugfix on
26652 0.2.3.9-alpha, where task 4552 added support for two layers of
26654 - Resume allowing the unit tests to run in gdb. This was accidentally
26655 made impossible when the DisableDebuggerAttachment option was
26656 introduced. Fixes bug 5448; bugfix on 0.2.3.9-alpha.
26657 - Resume building with nat-pmp support. Fixes bug 4955; bugfix on
26658 0.2.3.11-alpha. Reported by Anthony G. Basile.
26660 o Minor bugfixes (on 0.2.2.x and earlier):
26661 - Ensure we don't cannibalize circuits that are longer than three hops
26662 already, so we don't end up making circuits with 5 or more
26663 hops. Patch contributed by wanoskarnet. Fixes bug 5231; bugfix on
26664 0.1.0.1-rc which introduced cannibalization.
26665 - Detect and reject certain misformed escape sequences in
26666 configuration values. Previously, these values would cause us
26667 to crash if received in a torrc file or over an authenticated
26668 control port. Bug found by Esteban Manchado Velázquez, and
26669 independently by Robert Connolly from Matta Consulting who further
26670 noted that it allows a post-authentication heap overflow. Patch
26671 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
26672 bugfix on 0.2.0.16-alpha.
26673 - Fix a compile warning when using the --enable-openbsd-malloc
26674 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
26675 - Directory caches no longer refuse to clean out descriptors because
26676 of missing v2 networkstatus documents, unless they're configured
26677 to retrieve v2 networkstatus documents. Fixes bug 4838; bugfix on
26678 0.2.2.26-beta. Patch by Daniel Bryg.
26679 - Update to the latest version of the tinytest unit testing framework.
26680 This includes a couple of bugfixes that can be relevant for
26681 running forked unit tests on Windows, and removes all reserved
26684 o Minor bugfixes (on 0.2.3.x):
26685 - On a failed pipe() call, don't leak file descriptors. Fixes bug
26686 4296; bugfix on 0.2.3.1-alpha.
26687 - Spec conformance: on a v3 handshake, do not send a NETINFO cell
26688 until after we have received a CERTS cell. Fixes bug 4361; bugfix
26689 on 0.2.3.6-alpha. Patch by "frosty".
26690 - When binding to an IPv6 address, set the IPV6_V6ONLY socket
26691 option, so that the IP stack doesn't decide to use it for IPv4
26692 too. Fixes bug 4760; bugfix on 0.2.3.9-alpha.
26693 - Ensure that variables set in Tor's environment cannot override
26694 environment variables that Tor passes to a managed
26695 pluggable-transport proxy. Previously, Tor would pass every
26696 variable in its environment to managed proxies along with the new
26697 ones, in such a way that on many operating systems, the inherited
26698 environment variables would override those which Tor tried to
26699 explicitly set. Bugfix on 0.2.3.12-alpha for most Unixoid systems;
26700 bugfix on 0.2.3.9-alpha for Windows.
26703 - A wide variety of new unit tests by Esteban Manchado Velázquez.
26704 - Shorten links in the tor-exit-notice file. Patch by Christian Kujau.
26705 - Update to the March 6 2012 Maxmind GeoLite Country database.
26708 Changes in version 0.2.3.12-alpha - 2012-02-13
26709 Tor 0.2.3.12-alpha lets fast exit relays scale better, allows clients
26710 to use bridges that run Tor 0.2.2.x, and resolves several big bugs
26711 when Tor is configured to use a pluggable transport like obfsproxy.
26714 - Fix builds when the path to sed, openssl, or sha1sum contains
26715 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
26717 - Set the SO_REUSEADDR socket option before we call bind() on outgoing
26718 connections. This change should allow busy exit relays to stop
26719 running out of available sockets as quickly. Fixes bug 4950;
26720 bugfix on 0.2.2.26-beta.
26721 - Allow 0.2.3.x clients to use 0.2.2.x bridges. Previously the client
26722 would ask the bridge for microdescriptors, which are only supported
26723 in 0.2.3.x, and then fail to bootstrap when it didn't get the
26724 answers it wanted. Fixes bug 4013; bugfix on 0.2.3.2-alpha.
26725 - Properly set up obfsproxy's environment when in managed mode. The
26726 Tor Browser Bundle needs LD_LIBRARY_PATH to be passed to obfsproxy,
26727 and when you run your Tor as a daemon, there's no HOME. Fixes bugs
26728 5076 and 5082; bugfix on 0.2.3.6-alpha.
26731 - Use the dead_strip option when building Tor on OS X. This reduces
26732 binary size by almost 19% when linking openssl and libevent
26733 statically, which we do for Tor Browser Bundle.
26734 - Fix broken URLs in the sample torrc file, and tell readers about
26735 the OutboundBindAddress, ExitPolicyRejectPrivate, and
26736 PublishServerDescriptor options. Addresses bug 4652.
26737 - Update to the February 7 2012 Maxmind GeoLite Country database.
26740 - Downgrade the "We're missing a certificate" message from notice
26741 to info: people kept mistaking it for a real problem, whereas it
26742 is seldom the problem even when we are failing to bootstrap. Fixes
26743 bug 5067; bugfix on 0.2.0.10-alpha.
26744 - Don't put "TOR_PT_EXTENDED_SERVER_PORT=127.0.0.1:4200" in a
26745 managed pluggable transport server proxy's environment.
26746 Previously, we would put it there, even though Tor doesn't
26747 implement an 'extended server port' yet, and even though Tor
26748 almost certainly isn't listening at that address. For now, we set
26749 it to an empty string to avoid crashing older obfsproxies. Bugfix
26751 - Log the heartbeat message every HeartbeatPeriod seconds, not every
26752 HeartbeatPeriod + 1 seconds. Fixes bug 4942; bugfix on
26753 0.2.3.1-alpha. Bug reported by Scott Bennett.
26754 - Calculate absolute paths correctly on Windows. Fixes bug 4973;
26755 bugfix on 0.2.3.11-alpha.
26756 - Update "ClientOnly" man page entry to explain that there isn't
26757 really any point to messing with it. Resolves ticket 5005.
26758 - Use the correct CVE number for CVE-2011-4576 in our comments and
26759 log messages. Found by "fermenthor". Resolves bug 5066; bugfix on
26762 o Code simplifications and refactoring:
26763 - Use the _WIN32 macro throughout our code to detect Windows.
26764 (Previously we had used the obsolete 'WIN32' and the idiosyncratic
26768 Changes in version 0.2.3.11-alpha - 2012-01-22
26769 Tor 0.2.3.11-alpha marks feature-freeze for the 0.2.3 tree. It deploys
26770 the last step of the plan to limit maximum circuit length, includes
26771 a wide variety of hidden service performance and correctness fixes,
26772 works around an OpenSSL security flaw if your distro is too stubborn
26773 to upgrade, and fixes a bunch of smaller issues.
26776 - Now that Tor 0.2.0.x is completely deprecated, enable the final
26777 part of "Proposal 110: Avoiding infinite length circuits" by
26778 refusing all circuit-extend requests that do not use a relay_early
26779 cell. This change helps Tor resist a class of denial-of-service
26780 attacks by limiting the maximum circuit length.
26781 - Adjust the number of introduction points that a hidden service
26782 will try to maintain based on how long its introduction points
26783 remain in use and how many introductions they handle. Fixes
26785 - Try to use system facilities for enumerating local interface
26786 addresses, before falling back to our old approach (which was
26787 binding a UDP socket, and calling getsockname() on it). That
26788 approach was scaring OS X users whose draconian firewall
26789 software warned about binding to UDP sockets, regardless of
26790 whether packets were sent. Now we try to use getifaddrs(),
26791 SIOCGIFCONF, or GetAdaptersAddresses(), depending on what the
26792 system supports. Resolves ticket 1827.
26794 o Major security workaround:
26795 - When building or running with any version of OpenSSL earlier
26796 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
26797 versions have a bug (CVE-2011-4576) in which their block cipher
26798 padding includes uninitialized data, potentially leaking sensitive
26799 information to any peer with whom they make a SSLv3 connection. Tor
26800 does not use SSL v3 by default, but a hostile client or server
26801 could force an SSLv3 connection in order to gain information that
26802 they shouldn't have been able to get. The best solution here is to
26803 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
26804 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
26805 to make sure that the bug can't happen.
26808 - Fix the SOCKET_OK test that we use to tell when socket
26809 creation fails so that it works on Win64. Fixes part of bug 4533;
26810 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
26811 - Correct our replacements for the timeradd() and timersub() functions
26812 on platforms that lack them (for example, Windows). The timersub()
26813 function is used when expiring circuits, while timeradd() is
26814 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
26815 bugfix on 0.2.2.24-alpha and 0.2.3.1-alpha.
26816 - Do not use OpenSSL 1.0.0's counter mode: it has a critical bug
26817 that was fixed in OpenSSL 1.0.0a. We test for the counter mode
26818 bug at runtime, not compile time, because some distributions hack
26819 their OpenSSL to mis-report its version. Fixes bug 4779; bugfix
26820 on 0.2.3.9-alpha. Found by Pascal.
26822 o Minor features (controller):
26823 - Use absolute path names when reporting the torrc filename in the
26824 control protocol, so a controller can more easily find the torrc
26825 file. Resolves bug 1101.
26826 - Extend the control protocol to report flags that control a circuit's
26827 path selection in CIRC events and in replies to 'GETINFO
26828 circuit-status'. Implements part of ticket 2411.
26829 - Extend the control protocol to report the hidden service address
26830 and current state of a hidden-service-related circuit in CIRC
26831 events and in replies to 'GETINFO circuit-status'. Implements part
26833 - When reporting the path to the cookie file to the controller,
26834 give an absolute path. Resolves ticket 4881.
26835 - Allow controllers to request an event notification whenever a
26836 circuit is cannibalized or its purpose is changed. Implements
26837 part of ticket 3457.
26838 - Include the creation time of a circuit in CIRC and CIRC2
26839 control-port events and the list produced by the 'GETINFO
26840 circuit-status' control-port command.
26842 o Minor features (directory authorities):
26843 - Directory authorities now reject versions of Tor older than
26844 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
26845 inclusive. These versions accounted for only a small fraction of
26846 the Tor network, and have numerous known security issues. Resolves
26848 - Authority operators can now vote for all relays in a given
26849 set of countries to be BadDir/BadExit/Invalid/Rejected.
26850 - Provide two consensus parameters (FastFlagMinThreshold and
26851 FastFlagMaxThreshold) to control the range of allowable bandwidths
26852 for the Fast directory flag. These allow authorities to run
26853 experiments on appropriate requirements for being a "Fast" node.
26854 The AuthDirFastGuarantee config value still applies. Implements
26856 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
26857 directory authority option (introduced in Tor 0.2.2.34).
26859 o Minor features (other):
26860 - Don't disable the DirPort when we cannot exceed our AccountingMax
26861 limit during this interval because the effective bandwidthrate is
26862 low enough. This is useful in a situation where AccountMax is only
26863 used as an additional safeguard or to provide statistics.
26864 - Prepend an informative header to generated dynamic_dh_params files.
26865 - If EntryNodes are given, but UseEntryGuards is set to 0, warn that
26866 EntryNodes will have no effect. Resolves issue 2571.
26867 - Log more useful messages when we fail to disable debugger
26869 - Log which authority we're missing votes from when we go to fetch
26870 them from the other auths.
26871 - Log (at debug level) whenever a circuit's purpose is changed.
26872 - Add missing documentation for the MaxClientCircuitsPending,
26873 UseMicrodescriptors, UserspaceIOCPBuffers, and
26874 _UseFilteringSSLBufferevents options, all introduced during
26875 the 0.2.3.x series.
26876 - Update to the January 3 2012 Maxmind GeoLite Country database.
26878 o Minor bugfixes (hidden services):
26879 - Don't close hidden service client circuits which have almost
26880 finished connecting to their destination when they reach
26881 the normal circuit-build timeout. Previously, we would close
26882 introduction circuits which are waiting for an acknowledgement
26883 from the introduction point, and rendezvous circuits which have
26884 been specified in an INTRODUCE1 cell sent to a hidden service,
26885 after the normal CBT. Now, we mark them as 'timed out', and launch
26886 another rendezvous attempt in parallel. This behavior change can
26887 be disabled using the new CloseHSClientCircuitsImmediatelyOnTimeout
26888 option. Fixes part of bug 1297; bugfix on 0.2.2.2-alpha.
26889 - Don't close hidden-service-side rendezvous circuits when they
26890 reach the normal circuit-build timeout. This behavior change can
26891 be disabled using the new
26892 CloseHSServiceRendCircuitsImmediatelyOnTimeout option. Fixes the
26893 remaining part of bug 1297; bugfix on 0.2.2.2-alpha.
26894 - Make sure we never mark the wrong rendezvous circuit as having
26895 had its introduction cell acknowledged by the introduction-point
26896 relay. Previously, when we received an INTRODUCE_ACK cell on a
26897 client-side hidden-service introduction circuit, we might have
26898 marked a rendezvous circuit other than the one we specified in
26899 the INTRODUCE1 cell as INTRO_ACKED, which would have produced
26900 a warning message and interfered with the hidden service
26901 connection-establishment process. Fixes bug 4759; bugfix on
26902 0.2.3.3-alpha, when we added the stream-isolation feature which
26903 might cause Tor to open multiple rendezvous circuits for the same
26905 - Don't trigger an assertion failure when we mark a new client-side
26906 hidden-service introduction circuit for close during the process
26907 of creating it. Fixes bug 4796; bugfix on 0.2.3.6-alpha. Reported
26910 o Minor bugfixes (log messages):
26911 - Correctly spell "connect" in a log message on failure to create a
26912 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta and
26914 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
26915 Fixes bug 4856; bugfix on Tor 0.0.6.
26916 - Fix the log message describing how we work around discovering
26917 that our version is the ill-fated OpenSSL 0.9.8l. Fixes bug
26918 4837; bugfix on 0.2.2.9-alpha.
26919 - When logging about a disallowed .exit name, do not also call it
26920 an "invalid onion address". Fixes bug 3325; bugfix on 0.2.2.9-alpha.
26922 o Minor bugfixes (build fixes):
26923 - During configure, detect when we're building with clang version
26924 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
26925 CFLAGS. clang doesn't support them yet.
26926 - During configure, search for library containing cos function as
26927 libm lives in libcore on some platforms (BeOS/Haiku). Linking
26928 against libm was hard-coded before. Fixes the first part of bug
26929 4727; bugfix on 0.2.2.2-alpha. Patch and analysis by Martin Hebnes
26931 - Detect attempts to build Tor on (as yet hypothetical) versions
26932 of Windows where sizeof(intptr_t) != sizeof(SOCKET). Partial
26933 fix for bug 4533. Bugfix on 0.2.2.28-beta.
26934 - Preprocessor directives should not be put inside the arguments
26935 of a macro. This would break compilation with GCC releases prior
26936 to version 3.3. We would never recommend such an old GCC version,
26937 but it is apparently required for binary compatibility on some
26938 platforms (namely, certain builds of Haiku). Fixes the other part
26939 of bug 4727; bugfix on 0.2.3.3-alpha. Patch and analysis by Martin
26942 o Minor bugfixes (other):
26943 - Older Linux kernels erroneously respond to strange nmap behavior
26944 by having accept() return successfully with a zero-length
26945 socket. When this happens, just close the connection. Previously,
26946 we would try harder to learn the remote address: but there was
26947 no such remote address to learn, and our method for trying to
26948 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
26949 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
26950 - Fix null-pointer access that could occur if TLS allocation failed.
26951 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un". This was
26952 erroneously listed as fixed in 0.2.3.9-alpha, but the fix had
26953 accidentally been reverted.
26954 - Fix our implementation of crypto_random_hostname() so it can't
26955 overflow on ridiculously large inputs. (No Tor version has ever
26956 provided this kind of bad inputs, but let's be correct in depth.)
26957 Fixes bug 4413; bugfix on 0.2.2.9-alpha. Fix by Stephen Palmateer.
26958 - Find more places in the code that should have been testing for
26959 invalid sockets using the SOCKET_OK macro. Required for a fix
26960 for bug 4533. Bugfix on 0.2.2.28-beta.
26961 - Fix an assertion failure when, while running with bufferevents, a
26962 connection finishes connecting after it is marked for close, but
26963 before it is closed. Fixes bug 4697; bugfix on 0.2.3.1-alpha.
26964 - test_util_spawn_background_ok() hardcoded the expected value
26965 for ENOENT to 2. This isn't portable as error numbers are
26966 platform specific, and particularly the hurd has ENOENT at
26967 0x40000002. Construct expected string at runtime, using the correct
26968 value for ENOENT. Fixes bug 4733; bugfix on 0.2.3.1-alpha.
26969 - Reject attempts to disable DisableDebuggerAttachment while Tor is
26970 running. Fixes bug 4650; bugfix on 0.2.3.9-alpha.
26971 - Use an appropriate-width type for sockets in tor-fw-helper on
26972 win64. Fixes bug 1983 at last. Bugfix on 0.2.3.9-alpha.
26975 - When sending or relaying a RELAY_EARLY cell, we used to convert
26976 it to a RELAY cell if the connection was using the v1 link
26977 protocol. This was a workaround for older versions of Tor, which
26978 didn't handle RELAY_EARLY cells properly. Now that all supported
26979 versions can handle RELAY_EARLY cells, and now that we're enforcing
26980 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
26981 remove this workaround. Addresses bug 4786.
26983 o Code simplifications and refactoring:
26984 - Use OpenSSL's built-in SSL_state_string_long() instead of our
26985 own homebrewed ssl_state_to_string() replacement. Patch from
26986 Emile Snyder. Fixes bug 4653.
26987 - Use macros to indicate OpenSSL versions, so we don't need to worry
26988 about accidental hexadecimal bit shifts.
26989 - Remove some workaround code for OpenSSL 0.9.6 (which is no longer
26991 - Convert more instances of tor_snprintf+tor_strdup into tor_asprintf.
26992 - Use the smartlist_add_asprintf() alias more consistently.
26993 - Use a TOR_INVALID_SOCKET macro when initializing a socket to an
26994 invalid value, rather than just -1.
26995 - Rename a handful of old identifiers, mostly related to crypto
26996 structures and crypto functions. By convention, our "create an
26997 object" functions are called "type_new()", our "free an object"
26998 functions are called "type_free()", and our types indicate that
26999 they are types only with a final "_t". But a handful of older
27000 types and functions broke these rules, with function names like
27001 "type_create" or "subsystem_op_type", or with type names like
27005 Changes in version 0.2.3.10-alpha - 2011-12-16
27006 Tor 0.2.3.10-alpha fixes a critical heap-overflow security issue in
27007 Tor's buffers code. Absolutely everybody should upgrade.
27009 The bug relied on an incorrect calculation when making data continuous
27010 in one of our IO buffers, if the first chunk of the buffer was
27011 misaligned by just the wrong amount. The miscalculation would allow an
27012 attacker to overflow a piece of heap-allocated memory. To mount this
27013 attack, the attacker would need to either open a SOCKS connection to
27014 Tor's SocksPort (usually restricted to localhost), or target a Tor
27015 instance configured to make its connections through a SOCKS proxy
27016 (which Tor does not do by default).
27018 Good security practice requires that all heap-overflow bugs should be
27019 presumed to be exploitable until proven otherwise, so we are treating
27020 this as a potential code execution attack. Please upgrade immediately!
27021 This bug does not affect bufferevents-based builds of Tor. Special
27022 thanks to "Vektor" for reporting this issue to us!
27024 This release also contains a few minor bugfixes for issues discovered
27028 - Fix a heap overflow bug that could occur when trying to pull
27029 data into the first chunk of a buffer, when that chunk had
27030 already had some data drained from it. Fixes CVE-2011-2778;
27031 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
27034 - If we can't attach streams to a rendezvous circuit when we
27035 finish connecting to a hidden service, clear the rendezvous
27036 circuit's stream-isolation state and try to attach streams
27037 again. Previously, we cleared rendezvous circuits' isolation
27038 state either too early (if they were freshly built) or not at all
27039 (if they had been built earlier and were cannibalized). Bugfix on
27040 0.2.3.3-alpha; fixes bug 4655.
27041 - Fix compilation of the libnatpmp helper on non-Windows. Bugfix on
27042 0.2.3.9-alpha; fixes bug 4691. Reported by Anthony G. Basile.
27043 - Fix an assertion failure when a relay with accounting enabled
27044 starts up while dormant. Fixes bug 4702; bugfix on 0.2.3.9-alpha.
27047 - Update to the December 6 2011 Maxmind GeoLite Country database.
27050 Changes in version 0.2.2.35 - 2011-12-16
27051 Tor 0.2.2.35 fixes a critical heap-overflow security issue in Tor's
27052 buffers code. Absolutely everybody should upgrade.
27054 The bug relied on an incorrect calculation when making data continuous
27055 in one of our IO buffers, if the first chunk of the buffer was
27056 misaligned by just the wrong amount. The miscalculation would allow an
27057 attacker to overflow a piece of heap-allocated memory. To mount this
27058 attack, the attacker would need to either open a SOCKS connection to
27059 Tor's SocksPort (usually restricted to localhost), or target a Tor
27060 instance configured to make its connections through a SOCKS proxy
27061 (which Tor does not do by default).
27063 Good security practice requires that all heap-overflow bugs should be
27064 presumed to be exploitable until proven otherwise, so we are treating
27065 this as a potential code execution attack. Please upgrade immediately!
27066 This bug does not affect bufferevents-based builds of Tor. Special
27067 thanks to "Vektor" for reporting this issue to us!
27069 Tor 0.2.2.35 also fixes several bugs in previous versions, including
27070 crash bugs for unusual configurations, and a long-term bug that
27071 would prevent Tor from starting on Windows machines with draconian
27074 With this release, we remind everyone that 0.2.0.x has reached its
27075 formal end-of-life. Those Tor versions have many known flaws, and
27076 nobody should be using them. You should upgrade -- ideally to the
27077 0.2.2.x series. If you're using a Linux or BSD and its packages are
27078 obsolete, stop using those packages and upgrade anyway.
27080 The Tor 0.2.1.x series is also approaching its end-of-life: it will no
27081 longer receive support after some time in early 2012.
27084 - Fix a heap overflow bug that could occur when trying to pull
27085 data into the first chunk of a buffer, when that chunk had
27086 already had some data drained from it. Fixes CVE-2011-2778;
27087 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
27088 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
27089 that it doesn't attempt to allocate a socketpair. This could cause
27090 some problems on Windows systems with overzealous firewalls. Fix for
27091 bug 4457; workaround for Libevent versions 2.0.1-alpha through
27093 - If we mark an OR connection for close based on a cell we process,
27094 don't process any further cells on it. We already avoid further
27095 reads on marked-for-close connections, but now we also discard the
27096 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
27097 which was the first version where we might mark a connection for
27098 close based on processing a cell on it.
27099 - Correctly sanity-check that we don't underflow on a memory
27100 allocation (and then assert) for hidden service introduction
27101 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
27102 bugfix on 0.2.1.5-alpha.
27103 - Fix a memory leak when we check whether a hidden service
27104 descriptor has any usable introduction points left. Fixes bug
27105 4424. Bugfix on 0.2.2.25-alpha.
27106 - Don't crash when we're running as a relay and don't have a GeoIP
27107 file. Bugfix on 0.2.2.34; fixes bug 4340. This backports a fix
27108 we've had in the 0.2.3.x branch already.
27109 - When running as a client, do not print a misleading (and plain
27110 wrong) log message that we're collecting "directory request"
27111 statistics: clients don't collect statistics. Also don't create a
27112 useless (because empty) stats file in the stats/ directory. Fixes
27113 bug 4353; bugfix on 0.2.2.34.
27116 - Detect failure to initialize Libevent. This fix provides better
27117 detection for future instances of bug 4457.
27118 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
27119 function. This was eating up hideously large amounts of time on some
27120 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
27121 - Resolve an integer overflow bug in smartlist_ensure_capacity().
27122 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
27124 - Don't warn about unused log_mutex in log.c when building with
27125 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
27126 0.1.0.6-rc which introduced --disable-threads.
27127 - When configuring, starting, or stopping an NT service, stop
27128 immediately after the service configuration attempt has succeeded
27129 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
27130 - When sending a NETINFO cell, include the original address
27131 received for the other side, not its canonical address. Found
27132 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
27133 - Fix a typo in a hibernation-related log message. Fixes bug 4331;
27134 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
27135 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
27136 occurred when a client tried to fetch a descriptor for a bridge
27137 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
27138 - Backport fixes for a pair of compilation warnings on Windows.
27139 Fixes bug 4521; bugfix on 0.2.2.28-beta and on 0.2.2.29-beta.
27140 - If we had ever tried to call tor_addr_to_str on an address of
27141 unknown type, we would have done a strdup on an uninitialized
27142 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
27143 Reported by "troll_un".
27144 - Correctly detect and handle transient lookup failures from
27145 tor_addr_lookup. Fixes bug 4530; bugfix on 0.2.1.5-alpha.
27146 Reported by "troll_un".
27147 - Fix null-pointer access that could occur if TLS allocation failed.
27148 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
27149 - Use tor_socket_t type for listener argument to accept(). Fixes bug
27150 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
27153 - Add two new config options for directory authorities:
27154 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
27155 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
27156 that is always sufficient to satisfy the bandwidth requirement for
27157 the Guard flag. Now it will be easier for researchers to simulate
27158 Tor networks with different values. Resolves ticket 4484.
27159 - When Tor ignores a hidden service specified in its configuration,
27160 include the hidden service's directory in the warning message.
27161 Previously, we would only tell the user that some hidden service
27162 was ignored. Bugfix on 0.0.6; fixes bug 4426.
27163 - Update to the December 6 2011 Maxmind GeoLite Country database.
27165 o Packaging changes:
27166 - Make it easier to automate expert package builds on Windows,
27167 by removing an absolute path from makensis.exe command.
27170 Changes in version 0.2.1.32 - 2011-12-16
27171 Tor 0.2.1.32 backports important security and privacy fixes for
27172 oldstable. This release is intended only for package maintainers and
27173 others who cannot use the 0.2.2 stable series. All others should be
27174 using Tor 0.2.2.x or newer.
27176 The Tor 0.2.1.x series will reach formal end-of-life some time in
27177 early 2012; we will stop releasing patches for it then.
27179 o Major bugfixes (also included in 0.2.2.x):
27180 - Correctly sanity-check that we don't underflow on a memory
27181 allocation (and then assert) for hidden service introduction
27182 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
27183 bugfix on 0.2.1.5-alpha.
27184 - Fix a heap overflow bug that could occur when trying to pull
27185 data into the first chunk of a buffer, when that chunk had
27186 already had some data drained from it. Fixes CVE-2011-2778;
27187 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
27190 - Update to the December 6 2011 Maxmind GeoLite Country database.
27193 Changes in version 0.2.3.9-alpha - 2011-12-08
27194 Tor 0.2.3.9-alpha introduces initial IPv6 support for bridges, adds
27195 a "DisableNetwork" security feature that bundles can use to avoid
27196 touching the network until bridges are configured, moves forward on
27197 the pluggable transport design, fixes a flaw in the hidden service
27198 design that unnecessarily prevented clients with wrong clocks from
27199 reaching hidden services, and fixes a wide variety of other issues.
27202 - Clients can now connect to private bridges over IPv6. Bridges
27203 still need at least one IPv4 address in order to connect to
27204 other relays. Note that we don't yet handle the case where the
27205 user has two bridge lines for the same bridge (one IPv4, one
27206 IPv6). Implements parts of proposal 186.
27207 - New "DisableNetwork" config option to prevent Tor from launching any
27208 connections or accepting any connections except on a control port.
27209 Bundles and controllers can set this option before letting Tor talk
27210 to the rest of the network, for example to prevent any connections
27211 to a non-bridge address. Packages like Orbot can also use this
27212 option to instruct Tor to save power when the network is off.
27213 - Clients and bridges can now be configured to use a separate
27214 "transport" proxy. This approach makes the censorship arms race
27215 easier by allowing bridges to use protocol obfuscation plugins. It
27216 implements the "managed proxy" part of proposal 180 (ticket 3472).
27217 - When using OpenSSL 1.0.0 or later, use OpenSSL's counter mode
27218 implementation. It makes AES_CTR about 7% faster than our old one
27219 (which was about 10% faster than the one OpenSSL used to provide).
27220 Resolves ticket 4526.
27221 - Add a "tor2web mode" for clients that want to connect to hidden
27222 services non-anonymously (and possibly more quickly). As a safety
27223 measure to try to keep users from turning this on without knowing
27224 what they are doing, tor2web mode must be explicitly enabled at
27225 compile time, and a copy of Tor compiled to run in tor2web mode
27226 cannot be used as a normal Tor client. Implements feature 2553.
27227 - Add experimental support for running on Windows with IOCP and no
27228 kernel-space socket buffers. This feature is controlled by a new
27229 "UserspaceIOCPBuffers" config option (off by default), which has
27230 no effect unless Tor has been built with support for bufferevents,
27231 is running on Windows, and has enabled IOCP. This may, in the long
27232 run, help solve or mitigate bug 98.
27233 - Use a more secure consensus parameter voting algorithm. Now at
27234 least three directory authorities or a majority of them must
27235 vote on a given parameter before it will be included in the
27236 consensus. Implements proposal 178.
27239 - Hidden services now ignore the timestamps on INTRODUCE2 cells.
27240 They used to check that the timestamp was within 30 minutes
27241 of their system clock, so they could cap the size of their
27242 replay-detection cache, but that approach unnecessarily refused
27243 service to clients with wrong clocks. Bugfix on 0.2.1.6-alpha, when
27244 the v3 intro-point protocol (the first one which sent a timestamp
27245 field in the INTRODUCE2 cell) was introduced; fixes bug 3460.
27246 - Only use the EVP interface when AES acceleration is enabled,
27247 to avoid a 5-7% performance regression. Resolves issue 4525;
27248 bugfix on 0.2.3.8-alpha.
27250 o Privacy/anonymity features (bridge detection):
27251 - Make bridge SSL certificates a bit more stealthy by using random
27252 serial numbers, in the same fashion as OpenSSL when generating
27253 self-signed certificates. Implements ticket 4584.
27254 - Introduce a new config option "DynamicDHGroups", enabled by
27255 default, which provides each bridge with a unique prime DH modulus
27256 to be used during SSL handshakes. This option attempts to help
27257 against censors who might use the Apache DH modulus as a static
27258 identifier for bridges. Addresses ticket 4548.
27260 o Minor features (new/different config options):
27261 - New configuration option "DisableDebuggerAttachment" (on by default)
27262 to prevent basic debugging attachment attempts by other processes.
27263 Supports Mac OS X and Gnu/Linux. Resolves ticket 3313.
27264 - Allow MapAddress directives to specify matches against super-domains,
27265 as in "MapAddress *.torproject.org *.torproject.org.torserver.exit".
27266 Implements issue 933.
27267 - Slightly change behavior of "list" options (that is, config
27268 options that can appear more than once) when they appear both in
27269 torrc and on the command line. Previously, the command-line options
27270 would be appended to the ones from torrc. Now, the command-line
27271 options override the torrc options entirely. This new behavior
27272 allows the user to override list options (like exit policies and
27273 ports to listen on) from the command line, rather than simply
27274 appending to the list.
27275 - You can get the old (appending) command-line behavior for "list"
27276 options by prefixing the option name with a "+".
27277 - You can remove all the values for a "list" option from the command
27278 line without adding any new ones by prefixing the option name
27280 - Add experimental support for a "defaults" torrc file to be parsed
27281 before the regular torrc. Torrc options override the defaults file's
27282 options in the same way that the command line overrides the torrc.
27283 The SAVECONF controller command saves only those options which
27284 differ between the current configuration and the defaults file. HUP
27285 reloads both files. (Note: This is an experimental feature; its
27286 behavior will probably be refined in future 0.2.3.x-alpha versions
27287 to better meet packagers' needs.) Implements task 4552.
27290 - Try to make the introductory warning message that Tor prints on
27291 startup more useful for actually finding help and information.
27292 Resolves ticket 2474.
27293 - Running "make version" now displays the version of Tor that
27294 we're about to build. Idea from katmagic; resolves issue 4400.
27295 - Expire old or over-used hidden service introduction points.
27296 Required by fix for bug 3460.
27297 - Move the replay-detection cache for the RSA-encrypted parts of
27298 INTRODUCE2 cells to the introduction point data structures.
27299 Previously, we would use one replay-detection cache per hidden
27300 service. Required by fix for bug 3460.
27301 - Reduce the lifetime of elements of hidden services' Diffie-Hellman
27302 public key replay-detection cache from 60 minutes to 5 minutes. This
27303 replay-detection cache is now used only to detect multiple
27304 INTRODUCE2 cells specifying the same rendezvous point, so we can
27305 avoid launching multiple simultaneous attempts to connect to it.
27307 o Minor bugfixes (on Tor 0.2.2.x and earlier):
27308 - Resolve an integer overflow bug in smartlist_ensure_capacity().
27309 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
27311 - Fix a minor formatting issue in one of tor-gencert's error messages.
27313 - Prevent a false positive from the check-spaces script, by disabling
27314 the "whitespace between function name and (" check for functions
27316 - Fix a log message suggesting that people contact a non-existent
27317 email address. Fixes bug 3448.
27318 - Fix null-pointer access that could occur if TLS allocation failed.
27319 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
27320 - Report a real bootstrap problem to the controller on router
27321 identity mismatch. Previously we just said "foo", which probably
27322 made a lot of sense at the time. Fixes bug 4169; bugfix on
27324 - If we had ever tried to call tor_addr_to_str() on an address of
27325 unknown type, we would have done a strdup() on an uninitialized
27326 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
27327 Reported by "troll_un".
27328 - Correctly detect and handle transient lookup failures from
27329 tor_addr_lookup(). Fixes bug 4530; bugfix on 0.2.1.5-alpha.
27330 Reported by "troll_un".
27331 - Use tor_socket_t type for listener argument to accept(). Fixes bug
27332 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
27333 - Initialize conn->addr to a valid state in spawn_cpuworker(). Fixes
27334 bug 4532; found by "troll_un".
27336 o Minor bugfixes (on Tor 0.2.3.x):
27337 - Fix a compile warning in tor_inet_pton(). Bugfix on 0.2.3.8-alpha;
27339 - Don't send two ESTABLISH_RENDEZVOUS cells when opening a new
27340 circuit for use as a hidden service client's rendezvous point.
27341 Fixes bugs 4641 and 4171; bugfix on 0.2.3.3-alpha. Diagnosed
27342 with help from wanoskarnet.
27343 - Restore behavior of overriding SocksPort, ORPort, and similar
27344 options from the command line. Bugfix on 0.2.3.3-alpha.
27347 - Properly handle the case where the build-tree is not the same
27348 as the source tree when generating src/common/common_sha1.i,
27349 src/or/micro-revision.i, and src/or/or_sha1.i. Fixes bug 3953;
27350 bugfix on 0.2.0.1-alpha.
27352 o Code simplifications, cleanups, and refactorings:
27353 - Remove the pure attribute from all functions that used it
27354 previously. In many cases we assigned it incorrectly, because the
27355 functions might assert or call impure functions, and we don't have
27356 evidence that keeping the pure attribute is worthwhile. Implements
27357 changes suggested in ticket 4421.
27358 - Remove some dead code spotted by coverity. Fixes cid 432.
27359 Bugfix on 0.2.3.1-alpha, closes bug 4637.
27362 Changes in version 0.2.3.8-alpha - 2011-11-22
27363 Tor 0.2.3.8-alpha fixes some crash and assert bugs, including a
27364 socketpair-related bug that has been bothering Windows users. It adds
27365 support to serve microdescriptors to controllers, so Vidalia's network
27366 map can resume listing relays (once Vidalia implements its side),
27367 and adds better support for hardware AES acceleration. Finally, it
27368 starts the process of adjusting the bandwidth cutoff for getting the
27369 "Fast" flag from 20KB to (currently) 32KB -- preliminary results show
27370 that tiny relays harm performance more than they help network capacity.
27373 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
27374 that it doesn't attempt to allocate a socketpair. This could cause
27375 some problems on Windows systems with overzealous firewalls. Fix for
27376 bug 4457; workaround for Libevent versions 2.0.1-alpha through
27378 - Correctly sanity-check that we don't underflow on a memory
27379 allocation (and then assert) for hidden service introduction
27380 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
27381 bugfix on 0.2.1.5-alpha.
27382 - Remove the artificially low cutoff of 20KB to guarantee the Fast
27383 flag. In the past few years the average relay speed has picked
27384 up, and while the "top 7/8 of the network get the Fast flag" and
27385 "all relays with 20KB or more of capacity get the Fast flag" rules
27386 used to have the same result, now the top 7/8 of the network has
27387 a capacity more like 32KB. Bugfix on 0.2.1.14-rc. Fixes bug 4489.
27388 - Fix a rare assertion failure when checking whether a v0 hidden
27389 service descriptor has any usable introduction points left, and
27390 we don't have enough information to build a circuit to the first
27391 intro point named in the descriptor. The HS client code in
27392 0.2.3.x no longer uses v0 HS descriptors, but this assertion can
27393 trigger on (and crash) v0 HS authorities. Fixes bug 4411.
27394 Bugfix on 0.2.3.1-alpha; diagnosed by frosty_un.
27395 - Make bridge authorities not crash when they are asked for their own
27396 descriptor. Bugfix on 0.2.3.7-alpha, reported by Lucky Green.
27397 - When running as a client, do not print a misleading (and plain
27398 wrong) log message that we're collecting "directory request"
27399 statistics: clients don't collect statistics. Also don't create a
27400 useless (because empty) stats file in the stats/ directory. Fixes
27401 bug 4353; bugfix on 0.2.2.34 and 0.2.3.7-alpha.
27404 - Allow Tor controllers like Vidalia to obtain the microdescriptor
27405 for a relay by identity digest or nickname. Previously,
27406 microdescriptors were only available by their own digests, so a
27407 controller would have to ask for and parse the whole microdescriptor
27408 consensus in order to look up a single relay's microdesc. Fixes
27409 bug 3832; bugfix on 0.2.3.1-alpha.
27410 - Use OpenSSL's EVP interface for AES encryption, so that all AES
27411 operations can use hardware acceleration (if present). Resolves
27414 o Minor bugfixes (on 0.2.2.x and earlier):
27415 - Detect failure to initialize Libevent. This fix provides better
27416 detection for future instances of bug 4457.
27417 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
27418 function. This was eating up hideously large amounts of time on some
27419 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
27420 - Don't warn about unused log_mutex in log.c when building with
27421 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
27422 0.1.0.6-rc which introduced --disable-threads.
27423 - Allow manual 'authenticate' commands to the controller interface
27424 from netcat (nc) as well as telnet. We were rejecting them because
27425 they didn't come with the expected whitespace at the end of the
27426 command. Bugfix on 0.1.1.1-alpha; fixes bug 2893.
27427 - Fix some (not actually triggerable) buffer size checks in usage of
27428 tor_inet_ntop. Fixes bug 4434; bugfix on Tor 0.2.0.1-alpha. Patch
27430 - Fix parsing of some corner-cases with tor_inet_pton(). Fixes
27431 bug 4515; bugfix on 0.2.0.1-alpha; fix by Anders Sundman.
27432 - When configuring, starting, or stopping an NT service, stop
27433 immediately after the service configuration attempt has succeeded
27434 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
27435 - When sending a NETINFO cell, include the original address
27436 received for the other side, not its canonical address. Found
27437 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
27438 - Rename the bench_{aes,dmap} functions to test_*, so that tinytest
27439 can pick them up when the tests aren't disabled. Bugfix on
27440 0.2.2.4-alpha which introduced tinytest.
27441 - Fix a memory leak when we check whether a hidden service
27442 descriptor has any usable introduction points left. Fixes bug
27443 4424. Bugfix on 0.2.2.25-alpha.
27444 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
27445 occurred when a client tried to fetch a descriptor for a bridge
27446 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
27448 o Minor bugfixes (on 0.2.3.x):
27449 - Make util unit tests build correctly with MSVC. Bugfix on
27450 0.2.3.3-alpha. Patch by Gisle Vanem.
27451 - Successfully detect AUTH_CHALLENGE cells with no recognized
27452 authentication type listed. Fixes bug 4367; bugfix on 0.2.3.6-alpha.
27453 Found by frosty_un.
27454 - If a relay receives an AUTH_CHALLENGE cell it can't answer,
27455 it should still send a NETINFO cell to allow the connection to
27456 become open. Fixes bug 4368; fix on 0.2.3.6-alpha; bug found by
27458 - Log less loudly when we get an invalid authentication certificate
27459 from a source other than a directory authority: it's not unusual
27460 to see invalid certs because of clock skew. Fixes bug 4370; bugfix
27462 - Tolerate servers with more clock skew in their authentication
27463 certificates than previously. Fixes bug 4371; bugfix on
27465 - Fix a couple of compile warnings on Windows. Fixes bug 4469; bugfix
27466 on 0.2.3.4-alpha and 0.2.3.6-alpha.
27469 - Add two new config options for directory authorities:
27470 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
27471 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
27472 that is always sufficient to satisfy the bandwidth requirement for
27473 the Guard flag. Now it will be easier for researchers to simulate
27474 Tor networks with different values. Resolves ticket 4484.
27475 - When Tor ignores a hidden service specified in its configuration,
27476 include the hidden service's directory in the warning message.
27477 Previously, we would only tell the user that some hidden service
27478 was ignored. Bugfix on 0.0.6; fixes bug 4426.
27479 - When we fail to initialize Libevent, retry with IOCP disabled so we
27480 don't need to turn on multi-threading support in Libevent, which in
27481 turn requires a working socketpair(). This is a workaround for bug
27482 4457, which affects Libevent versions from 2.0.1-alpha through
27484 - Detect when we try to build on a platform that doesn't define
27485 AF_UNSPEC to 0. We don't work there, so refuse to compile.
27486 - Update to the November 1 2011 Maxmind GeoLite Country database.
27488 o Packaging changes:
27489 - Make it easier to automate expert package builds on Windows,
27490 by removing an absolute path from makensis.exe command.
27492 o Code simplifications and refactoring:
27493 - Remove some redundant #include directives throughout the code.
27494 Patch from Andrea Gelmini.
27495 - Unconditionally use OpenSSL's AES implementation instead of our
27496 old built-in one. OpenSSL's AES has been better for a while, and
27497 relatively few servers should still be on any version of OpenSSL
27498 that doesn't have good optimized assembly AES.
27499 - Use the name "CERTS" consistently to refer to the new cell type;
27500 we were calling it CERT in some places and CERTS in others.
27503 - Numerous new unit tests for functions in util.c and address.c by
27505 - The long-disabled benchmark tests are now split into their own
27506 ./src/test/bench binary.
27507 - The benchmark tests can now use more accurate timers than
27508 gettimeofday() when such timers are available.
27511 Changes in version 0.2.3.7-alpha - 2011-10-30
27512 Tor 0.2.3.7-alpha fixes a crash bug in 0.2.3.6-alpha introduced by
27513 the new v3 handshake. It also resolves yet another bridge address
27517 - If we mark an OR connection for close based on a cell we process,
27518 don't process any further cells on it. We already avoid further
27519 reads on marked-for-close connections, but now we also discard the
27520 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
27521 which was the first version where we might mark a connection for
27522 close based on processing a cell on it.
27523 - Fix a double-free bug that would occur when we received an invalid
27524 certificate in a CERT cell in the new v3 handshake. Fixes bug 4343;
27525 bugfix on 0.2.3.6-alpha.
27526 - Bridges no longer include their address in NETINFO cells on outgoing
27527 OR connections, to allow them to blend in better with clients.
27528 Removes another avenue for enumerating bridges. Reported by
27529 "troll_un". Fixes bug 4348; bugfix on 0.2.0.10-alpha, when NETINFO
27530 cells were introduced.
27533 - Fixed a typo in a hibernation-related log message. Fixes bug 4331;
27534 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
27537 Changes in version 0.2.3.6-alpha - 2011-10-26
27538 Tor 0.2.3.6-alpha includes the fix from 0.2.2.34 for a critical
27539 anonymity vulnerability where an attacker can deanonymize Tor
27540 users. Everybody should upgrade.
27542 This release also features support for a new v3 connection handshake
27543 protocol, and fixes to make hidden service connections more robust.
27546 - Implement a new handshake protocol (v3) for authenticating Tors to
27547 each other over TLS. It should be more resistant to fingerprinting
27548 than previous protocols, and should require less TLS hacking for
27549 future Tor implementations. Implements proposal 176.
27550 - Allow variable-length padding cells to disguise the length of
27551 Tor's TLS records. Implements part of proposal 184.
27553 o Privacy/anonymity fixes (clients):
27554 - Clients and bridges no longer send TLS certificate chains on
27555 outgoing OR connections. Previously, each client or bridge would
27556 use the same cert chain for all outgoing OR connections until
27557 its IP address changes, which allowed any relay that the client
27558 or bridge contacted to determine which entry guards it is using.
27559 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
27560 - If a relay receives a CREATE_FAST cell on a TLS connection, it
27561 no longer considers that connection as suitable for satisfying a
27562 circuit EXTEND request. Now relays can protect clients from the
27563 CVE-2011-2768 issue even if the clients haven't upgraded yet.
27564 - Directory authorities no longer assign the Guard flag to relays
27565 that haven't upgraded to the above "refuse EXTEND requests
27566 to client connections" fix. Now directory authorities can
27567 protect clients from the CVE-2011-2768 issue even if neither
27568 the clients nor the relays have upgraded yet. There's a new
27569 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
27570 to let us transition smoothly, else tomorrow there would be no
27573 o Major bugfixes (hidden services):
27574 - Improve hidden service robustness: when an attempt to connect to
27575 a hidden service ends, be willing to refetch its hidden service
27576 descriptors from each of the HSDir relays responsible for them
27577 immediately. Previously, we would not consider refetching the
27578 service's descriptors from each HSDir for 15 minutes after the last
27579 fetch, which was inconvenient if the hidden service was not running
27580 during the first attempt. Bugfix on 0.2.0.18-alpha; fixes bug 3335.
27581 - When one of a hidden service's introduction points appears to be
27582 unreachable, stop trying it. Previously, we would keep trying
27583 to build circuits to the introduction point until we lost the
27584 descriptor, usually because the user gave up and restarted Tor.
27585 Partly fixes bug 3825.
27586 - Don't launch a useless circuit after failing to use one of a
27587 hidden service's introduction points. Previously, we would
27588 launch a new introduction circuit, but not set the hidden service
27589 which that circuit was intended to connect to, so it would never
27590 actually be used. A different piece of code would then create a
27591 new introduction circuit correctly. Bug reported by katmagic and
27592 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
27594 o Major bugfixes (other):
27595 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
27596 that they initiated. Relays could distinguish incoming bridge
27597 connections from client connections, creating another avenue for
27598 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
27599 Found by "frosty_un".
27600 - Don't update the AccountingSoftLimitHitAt state file entry whenever
27601 tor gets started. This prevents a wrong average bandwidth
27602 estimate, which would cause relays to always start a new accounting
27603 interval at the earliest possible moment. Fixes bug 2003; bugfix
27604 on 0.2.2.7-alpha. Reported by BryonEldridge, who also helped
27605 immensely in tracking this bug down.
27606 - Fix a crash bug when changing node restrictions while a DNS lookup
27607 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
27610 o Minor bugfixes (on 0.2.2.x and earlier):
27611 - When a hidden service turns an extra service-side introduction
27612 circuit into a general-purpose circuit, free the rend_data and
27613 intro_key fields first, so we won't leak memory if the circuit
27614 is cannibalized for use as another service-side introduction
27615 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
27616 - Rephrase the log message emitted if the TestSocks check is
27617 successful. Patch from Fabian Keil; fixes bug 4094.
27618 - Bridges now skip DNS self-tests, to act a little more stealthily.
27619 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
27620 bridges. Patch by "warms0x".
27621 - Remove a confusing dollar sign from the example fingerprint in the
27622 man page, and also make the example fingerprint a valid one. Fixes
27623 bug 4309; bugfix on 0.2.1.3-alpha.
27624 - Fix internal bug-checking logic that was supposed to catch
27625 failures in digest generation so that it will fail more robustly
27626 if we ask for a nonexistent algorithm. Found by Coverity Scan.
27627 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
27628 - Report any failure in init_keys() calls launched because our
27629 IP address has changed. Spotted by Coverity Scan. Bugfix on
27630 0.1.1.4-alpha; fixes CID 484.
27632 o Minor bugfixes (on 0.2.3.x):
27633 - Fix a bug in configure.in that kept it from building a configure
27634 script with autoconf versions earlier than 2.61. Fixes bug 2430;
27635 bugfix on 0.2.3.1-alpha.
27636 - Don't warn users that they are exposing a client port to the
27637 Internet if they have specified an RFC1918 address. Previously,
27638 we would warn if the user had specified any non-loopback
27639 address. Bugfix on 0.2.3.3-alpha. Fixes bug 4018; reported by Tas.
27640 - Fix memory leaks in the failing cases of the new SocksPort and
27641 ControlPort code. Found by Coverity Scan. Bugfix on 0.2.3.3-alpha;
27642 fixes coverity CIDs 485, 486, and 487.
27645 - When a hidden service's introduction point times out, consider
27646 trying it again during the next attempt to connect to the
27647 HS. Previously, we would not try it again unless a newly fetched
27648 descriptor contained it. Required by fixes for bugs 1297 and 3825.
27649 - The next version of Windows will be called Windows 8, and it has
27650 a major version of 6, minor version of 2. Correctly identify that
27651 version instead of calling it "Very recent version". Resolves
27652 ticket 4153; reported by funkstar.
27653 - The Bridge Authority now writes statistics on how many bridge
27654 descriptors it gave out in total, and how many unique descriptors
27655 it gave out. It also lists how often the most and least commonly
27656 fetched descriptors were given out, as well as the median and
27657 25th/75th percentile. Implements tickets 4200 and 4294.
27658 - Update to the October 4 2011 Maxmind GeoLite Country database.
27660 o Code simplifications and refactoring:
27661 - Remove some old code to remember statistics about which descriptors
27662 we've served as a directory mirror. The feature wasn't used and
27663 is outdated now that microdescriptors are around.
27664 - Rename Tor functions that turn strings into addresses, so that
27665 "parse" indicates that no hostname resolution occurs, and
27666 "lookup" indicates that hostname resolution may occur. This
27667 should help prevent mistakes in the future. Fixes bug 3512.
27670 Changes in version 0.2.2.34 - 2011-10-26
27671 Tor 0.2.2.34 fixes a critical anonymity vulnerability where an attacker
27672 can deanonymize Tor users. Everybody should upgrade.
27674 The attack relies on four components: 1) Clients reuse their TLS cert
27675 when talking to different relays, so relays can recognize a user by
27676 the identity key in her cert. 2) An attacker who knows the client's
27677 identity key can probe each guard relay to see if that identity key
27678 is connected to that guard relay right now. 3) A variety of active
27679 attacks in the literature (starting from "Low-Cost Traffic Analysis
27680 of Tor" by Murdoch and Danezis in 2005) allow a malicious website to
27681 discover the guard relays that a Tor user visiting the website is using.
27682 4) Clients typically pick three guards at random, so the set of guards
27683 for a given user could well be a unique fingerprint for her. This
27684 release fixes components #1 and #2, which is enough to block the attack;
27685 the other two remain as open research problems. Special thanks to
27686 "frosty_un" for reporting the issue to us!
27688 Clients should upgrade so they are no longer recognizable by the TLS
27689 certs they present. Relays should upgrade so they no longer allow a
27690 remote attacker to probe them to test whether unpatched clients are
27691 currently connected to them.
27693 This release also fixes several vulnerabilities that allow an attacker
27694 to enumerate bridge relays. Some bridge enumeration attacks still
27695 remain; see for example proposal 188.
27697 o Privacy/anonymity fixes (clients):
27698 - Clients and bridges no longer send TLS certificate chains on
27699 outgoing OR connections. Previously, each client or bridge would
27700 use the same cert chain for all outgoing OR connections until
27701 its IP address changes, which allowed any relay that the client
27702 or bridge contacted to determine which entry guards it is using.
27703 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
27704 - If a relay receives a CREATE_FAST cell on a TLS connection, it
27705 no longer considers that connection as suitable for satisfying a
27706 circuit EXTEND request. Now relays can protect clients from the
27707 CVE-2011-2768 issue even if the clients haven't upgraded yet.
27708 - Directory authorities no longer assign the Guard flag to relays
27709 that haven't upgraded to the above "refuse EXTEND requests
27710 to client connections" fix. Now directory authorities can
27711 protect clients from the CVE-2011-2768 issue even if neither
27712 the clients nor the relays have upgraded yet. There's a new
27713 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
27714 to let us transition smoothly, else tomorrow there would be no
27717 o Privacy/anonymity fixes (bridge enumeration):
27718 - Bridge relays now do their directory fetches inside Tor TLS
27719 connections, like all the other clients do, rather than connecting
27720 directly to the DirPort like public relays do. Removes another
27721 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
27722 - Bridges relays now build circuits for themselves in a more similar
27723 way to how clients build them. Removes another avenue for
27724 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
27725 when bridges were introduced.
27726 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
27727 that they initiated. Relays could distinguish incoming bridge
27728 connections from client connections, creating another avenue for
27729 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
27730 Found by "frosty_un".
27733 - Fix a crash bug when changing node restrictions while a DNS lookup
27734 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
27736 - Don't launch a useless circuit after failing to use one of a
27737 hidden service's introduction points. Previously, we would
27738 launch a new introduction circuit, but not set the hidden service
27739 which that circuit was intended to connect to, so it would never
27740 actually be used. A different piece of code would then create a
27741 new introduction circuit correctly. Bug reported by katmagic and
27742 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
27745 - Change an integer overflow check in the OpenBSD_Malloc code so
27746 that GCC is less likely to eliminate it as impossible. Patch
27747 from Mansour Moufid. Fixes bug 4059.
27748 - When a hidden service turns an extra service-side introduction
27749 circuit into a general-purpose circuit, free the rend_data and
27750 intro_key fields first, so we won't leak memory if the circuit
27751 is cannibalized for use as another service-side introduction
27752 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
27753 - Bridges now skip DNS self-tests, to act a little more stealthily.
27754 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
27755 bridges. Patch by "warms0x".
27756 - Fix internal bug-checking logic that was supposed to catch
27757 failures in digest generation so that it will fail more robustly
27758 if we ask for a nonexistent algorithm. Found by Coverity Scan.
27759 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
27760 - Report any failure in init_keys() calls launched because our
27761 IP address has changed. Spotted by Coverity Scan. Bugfix on
27762 0.1.1.4-alpha; fixes CID 484.
27764 o Minor bugfixes (log messages and documentation):
27765 - Remove a confusing dollar sign from the example fingerprint in the
27766 man page, and also make the example fingerprint a valid one. Fixes
27767 bug 4309; bugfix on 0.2.1.3-alpha.
27768 - The next version of Windows will be called Windows 8, and it has
27769 a major version of 6, minor version of 2. Correctly identify that
27770 version instead of calling it "Very recent version". Resolves
27771 ticket 4153; reported by funkstar.
27772 - Downgrade log messages about circuit timeout calibration from
27773 "notice" to "info": they don't require or suggest any human
27774 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
27775 bugfix on 0.2.2.14-alpha.
27778 - Turn on directory request statistics by default and include them in
27779 extra-info descriptors. Don't break if we have no GeoIP database.
27780 Backported from 0.2.3.1-alpha; implements ticket 3951.
27781 - Update to the October 4 2011 Maxmind GeoLite Country database.
27784 Changes in version 0.2.1.31 - 2011-10-26
27785 Tor 0.2.1.31 backports important security and privacy fixes for
27786 oldstable. This release is intended only for package maintainers and
27787 others who cannot use the 0.2.2 stable series. All others should be
27788 using Tor 0.2.2.x or newer.
27790 o Security fixes (also included in 0.2.2.x):
27791 - Replace all potentially sensitive memory comparison operations
27792 with versions whose runtime does not depend on the data being
27793 compared. This will help resist a class of attacks where an
27794 adversary can use variations in timing information to learn
27795 sensitive data. Fix for one case of bug 3122. (Safe memcmp
27796 implementation by Robert Ransom based partially on code by DJB.)
27797 - Fix an assert in parsing router descriptors containing IPv6
27798 addresses. This one took down the directory authorities when
27799 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
27801 o Privacy/anonymity fixes (also included in 0.2.2.x):
27802 - Clients and bridges no longer send TLS certificate chains on
27803 outgoing OR connections. Previously, each client or bridge would
27804 use the same cert chain for all outgoing OR connections until
27805 its IP address changes, which allowed any relay that the client
27806 or bridge contacted to determine which entry guards it is using.
27807 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
27808 - If a relay receives a CREATE_FAST cell on a TLS connection, it
27809 no longer considers that connection as suitable for satisfying a
27810 circuit EXTEND request. Now relays can protect clients from the
27811 CVE-2011-2768 issue even if the clients haven't upgraded yet.
27812 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
27813 that they initiated. Relays could distinguish incoming bridge
27814 connections from client connections, creating another avenue for
27815 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
27816 Found by "frosty_un".
27817 - When receiving a hidden service descriptor, check that it is for
27818 the hidden service we wanted. Previously, Tor would store any
27819 hidden service descriptors that a directory gave it, whether it
27820 wanted them or not. This wouldn't have let an attacker impersonate
27821 a hidden service, but it did let directories pre-seed a client
27822 with descriptors that it didn't want. Bugfix on 0.0.6.
27823 - Avoid linkability based on cached hidden service descriptors: forget
27824 all hidden service descriptors cached as a client when processing a
27825 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
27826 - Make the bridge directory authority refuse to answer directory
27827 requests for "all" descriptors. It used to include bridge
27828 descriptors in its answer, which was a major information leak.
27829 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
27830 - Don't attach new streams to old rendezvous circuits after SIGNAL
27831 NEWNYM. Previously, we would keep using an existing rendezvous
27832 circuit if it remained open (i.e. if it were kept open by a
27833 long-lived stream, or if a new stream were attached to it before
27834 Tor could notice that it was old and no longer in use). Bugfix on
27835 0.1.1.15-rc; fixes bug 3375.
27837 o Minor bugfixes (also included in 0.2.2.x):
27838 - When we restart our relay, we might get a successful connection
27839 from the outside before we've started our reachability tests,
27840 triggering a warning: "ORPort found reachable, but I have no
27841 routerinfo yet. Failing to inform controller of success." This
27842 bug was harmless unless Tor is running under a controller
27843 like Vidalia, in which case the controller would never get a
27844 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
27846 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
27847 enabled. Fixes bug 1526.
27848 - Remove undocumented option "-F" from tor-resolve: it hasn't done
27849 anything since 0.2.1.16-rc.
27850 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
27851 None of the cases where we did this before were wrong, but by making
27852 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
27853 - Fix a rare crash bug that could occur when a client was configured
27854 with a large number of bridges. Fixes bug 2629; bugfix on
27855 0.2.1.2-alpha. Bugfix by trac user "shitlei".
27856 - Correct the warning displayed when a rendezvous descriptor exceeds
27857 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
27859 - Fix an uncommon assertion failure when running with DNSPort under
27860 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
27861 - When warning about missing zlib development packages during compile,
27862 give the correct package names. Bugfix on 0.2.0.1-alpha.
27863 - Require that introduction point keys and onion keys have public
27864 exponent 65537. Bugfix on 0.2.0.10-alpha.
27865 - Do not crash when our configuration file becomes unreadable, for
27866 example due to a permissions change, between when we start up
27867 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
27869 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
27871 - Always NUL-terminate the sun_path field of a sockaddr_un before
27872 passing it to the kernel. (Not a security issue: kernels are
27873 smart enough to reject bad sockaddr_uns.) Found by Coverity;
27874 CID #428. Bugfix on Tor 0.2.0.3-alpha.
27875 - Don't stack-allocate the list of supplementary GIDs when we're
27876 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
27877 could take up to 256K, which is way too much stack. Found by
27878 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
27880 o Minor bugfixes (only in 0.2.1.x):
27881 - Resume using micro-version numbers in 0.2.1.x: our Debian packages
27882 rely on them. Bugfix on 0.2.1.30.
27883 - Use git revisions instead of svn revisions when generating our
27884 micro-version numbers. Bugfix on 0.2.1.15-rc; fixes bug 2402.
27886 o Minor features (also included in 0.2.2.x):
27887 - Adjust the expiration time on our SSL session certificates to
27888 better match SSL certs seen in the wild. Resolves ticket 4014.
27889 - Allow nameservers with IPv6 address. Resolves bug 2574.
27890 - Update to the October 4 2011 Maxmind GeoLite Country database.
27893 Changes in version 0.2.3.5-alpha - 2011-09-28
27894 Tor 0.2.3.5-alpha fixes two bugs that make it possible to enumerate
27895 bridge relays; fixes an assertion error that many users started hitting
27896 today; and adds the ability to refill token buckets more often than
27897 once per second, allowing significant performance improvements.
27900 - Bridge relays now do their directory fetches inside Tor TLS
27901 connections, like all the other clients do, rather than connecting
27902 directly to the DirPort like public relays do. Removes another
27903 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
27904 - Bridges relays now build circuits for themselves in a more similar
27905 way to how clients build them. Removes another avenue for
27906 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
27907 when bridges were introduced.
27910 - Fix an "Assertion md->held_by_node == 1 failed" error that could
27911 occur when the same microdescriptor was referenced by two node_t
27912 objects at once. Fix for bug 4118; bugfix on Tor 0.2.3.1-alpha.
27914 o Major features (networking):
27915 - Add a new TokenBucketRefillInterval option to refill token buckets
27916 more frequently than once per second. This should improve network
27917 performance, alleviate queueing problems, and make traffic less
27918 bursty. Implements proposal 183; closes ticket 3630. Design by
27919 Florian Tschorsch and Björn Scheuermann; implementation by
27923 - Change an integer overflow check in the OpenBSD_Malloc code so
27924 that GCC is less likely to eliminate it as impossible. Patch
27925 from Mansour Moufid. Fixes bug 4059.
27927 o Minor bugfixes (usability):
27928 - Downgrade log messages about circuit timeout calibration from
27929 "notice" to "info": they don't require or suggest any human
27930 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
27931 bugfix on 0.2.2.14-alpha.
27933 o Minor features (diagnostics):
27934 - When the system call to create a listener socket fails, log the
27935 error message explaining why. This may help diagnose bug 4027.
27938 Changes in version 0.2.3.4-alpha - 2011-09-13
27939 Tor 0.2.3.4-alpha includes the fixes from 0.2.2.33, including a slight
27940 tweak to Tor's TLS handshake that makes relays and bridges that run
27941 this new version reachable from Iran again. It also fixes a few new
27942 bugs in 0.2.3.x, and teaches relays to recognize when they're not
27943 listed in the network consensus and republish.
27945 o Major bugfixes (also part of 0.2.2.33):
27946 - Avoid an assertion failure when reloading a configuration with
27947 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
27948 3923; bugfix on 0.2.2.25-alpha.
27950 o Minor features (security, also part of 0.2.2.33):
27951 - Check for replays of the public-key encrypted portion of an
27952 INTRODUCE1 cell, in addition to the current check for replays of
27953 the g^x value. This prevents a possible class of active attacks
27954 by an attacker who controls both an introduction point and a
27955 rendezvous point, and who uses the malleability of AES-CTR to
27956 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
27957 that these attacks are infeasible (requiring the attacker to send
27958 on the order of zettabytes of altered cells in a short interval),
27959 but we'd rather block them off in case there are any classes of
27960 this attack that we missed. Reported by Willem Pinckaers.
27962 o Minor features (also part of 0.2.2.33):
27963 - Adjust the expiration time on our SSL session certificates to
27964 better match SSL certs seen in the wild. Resolves ticket 4014.
27965 - Change the default required uptime for a relay to be accepted as
27966 a HSDir (hidden service directory) from 24 hours to 25 hours.
27967 Improves on 0.2.0.10-alpha; resolves ticket 2649.
27968 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
27969 authorities to abstain from voting on assignment of the HSDir
27970 consensus flag. Related to bug 2649.
27971 - Update to the September 6 2011 Maxmind GeoLite Country database.
27973 o Minor bugfixes (also part of 0.2.2.33):
27974 - Demote the 'replay detected' log message emitted when a hidden
27975 service receives the same Diffie-Hellman public key in two different
27976 INTRODUCE2 cells to info level. A normal Tor client can cause that
27977 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
27978 fixes part of bug 2442.
27979 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
27980 level. There is nothing that a hidden service's operator can do
27981 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
27983 - Clarify a log message specifying the characters permitted in
27984 HiddenServiceAuthorizeClient client names. Previously, the log
27985 message said that "[A-Za-z0-9+-_]" were permitted; that could have
27986 given the impression that every ASCII character between "+" and "_"
27987 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
27989 o Build fixes (also part of 0.2.2.33):
27990 - Clean up some code issues that prevented Tor from building on older
27991 BSDs. Fixes bug 3894; reported by "grarpamp".
27992 - Search for a platform-specific version of "ar" when cross-compiling.
27993 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
27996 - Fix a bug where the SocksPort option (for example) would get
27997 ignored and replaced by the default if a SocksListenAddress
27998 option was set. Bugfix on 0.2.3.3-alpha; fixes bug 3936. Fix by
28002 - Relays now try regenerating and uploading their descriptor more
28003 frequently if they are not listed in the consensus, or if the
28004 version of their descriptor listed in the consensus is too
28005 old. This fix should prevent situations where a server declines
28006 to re-publish itself because it has done so too recently, even
28007 though the authorities decided not to list its recent-enough
28008 descriptor. Fix for bug 3327.
28011 - Relays now include a reason for regenerating their descriptors
28012 in an HTTP header when uploading to the authorities. This will
28013 make it easier to debug descriptor-upload issues in the future.
28014 - When starting as root and then changing our UID via the User
28015 control option, and we have a ControlSocket configured, make sure
28016 that the ControlSocket is owned by the same account that Tor will
28017 run under. Implements ticket 3421; fix by Jérémy Bobbio.
28020 - Abort if tor_vasprintf fails in connection_printf_to_buf (a
28021 utility function used in the control-port code). This shouldn't
28022 ever happen unless Tor is completely out of memory, but if it did
28023 happen and Tor somehow recovered from it, Tor could have sent a log
28024 message to a control port in the middle of a reply to a controller
28025 command. Fixes part of bug 3428; bugfix on 0.1.2.3-alpha.
28026 - Make 'FetchUselessDescriptors' cause all descriptor types and
28027 all consensus types (including microdescriptors) to get fetched.
28028 Fixes bug 3851; bugfix on 0.2.3.1-alpha.
28030 o Code refactoring:
28031 - Make a new "entry connection" struct as an internal subtype of "edge
28032 connection", to simplify the code and make exit connections smaller.
28035 Changes in version 0.2.2.33 - 2011-09-13
28036 Tor 0.2.2.33 fixes several bugs, and includes a slight tweak to Tor's
28037 TLS handshake that makes relays and bridges that run this new version
28038 reachable from Iran again.
28041 - Avoid an assertion failure when reloading a configuration with
28042 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
28043 3923; bugfix on 0.2.2.25-alpha.
28045 o Minor features (security):
28046 - Check for replays of the public-key encrypted portion of an
28047 INTRODUCE1 cell, in addition to the current check for replays of
28048 the g^x value. This prevents a possible class of active attacks
28049 by an attacker who controls both an introduction point and a
28050 rendezvous point, and who uses the malleability of AES-CTR to
28051 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
28052 that these attacks are infeasible (requiring the attacker to send
28053 on the order of zettabytes of altered cells in a short interval),
28054 but we'd rather block them off in case there are any classes of
28055 this attack that we missed. Reported by Willem Pinckaers.
28058 - Adjust the expiration time on our SSL session certificates to
28059 better match SSL certs seen in the wild. Resolves ticket 4014.
28060 - Change the default required uptime for a relay to be accepted as
28061 a HSDir (hidden service directory) from 24 hours to 25 hours.
28062 Improves on 0.2.0.10-alpha; resolves ticket 2649.
28063 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
28064 authorities to abstain from voting on assignment of the HSDir
28065 consensus flag. Related to bug 2649.
28066 - Update to the September 6 2011 Maxmind GeoLite Country database.
28068 o Minor bugfixes (documentation and log messages):
28069 - Correct the man page to explain that HashedControlPassword and
28070 CookieAuthentication can both be set, in which case either method
28071 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
28072 when we decided to allow these config options to both be set. Issue
28073 raised by bug 3898.
28074 - Demote the 'replay detected' log message emitted when a hidden
28075 service receives the same Diffie-Hellman public key in two different
28076 INTRODUCE2 cells to info level. A normal Tor client can cause that
28077 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
28078 fixes part of bug 2442.
28079 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
28080 level. There is nothing that a hidden service's operator can do
28081 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
28083 - Clarify a log message specifying the characters permitted in
28084 HiddenServiceAuthorizeClient client names. Previously, the log
28085 message said that "[A-Za-z0-9+-_]" were permitted; that could have
28086 given the impression that every ASCII character between "+" and "_"
28087 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
28090 - Provide a substitute implementation of lround() for MSVC, which
28091 apparently lacks it. Patch from Gisle Vanem.
28092 - Clean up some code issues that prevented Tor from building on older
28093 BSDs. Fixes bug 3894; reported by "grarpamp".
28094 - Search for a platform-specific version of "ar" when cross-compiling.
28095 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
28098 Changes in version 0.2.3.3-alpha - 2011-09-01
28099 Tor 0.2.3.3-alpha adds a new "stream isolation" feature to improve Tor's
28100 security, and provides client-side support for the microdescriptor
28101 and optimistic data features introduced earlier in the 0.2.3.x
28102 series. It also includes numerous critical bugfixes in the (optional)
28103 bufferevent-based networking backend.
28105 o Major features (stream isolation):
28106 - You can now configure Tor so that streams from different
28107 applications are isolated on different circuits, to prevent an
28108 attacker who sees your streams as they leave an exit node from
28109 linking your sessions to one another. To do this, choose some way
28110 to distinguish the applications: have them connect to different
28111 SocksPorts, or have one of them use SOCKS4 while the other uses
28112 SOCKS5, or have them pass different authentication strings to the
28113 SOCKS proxy. Then, use the new SocksPort syntax to configure the
28114 degree of isolation you need. This implements Proposal 171.
28115 - There's a new syntax for specifying multiple client ports (such as
28116 SOCKSPort, TransPort, DNSPort, NATDPort): you can now just declare
28117 multiple *Port entries with full addr:port syntax on each.
28118 The old *ListenAddress format is still supported, but you can't
28119 mix it with the new *Port syntax.
28121 o Major features (other):
28122 - Enable microdescriptor fetching by default for clients. This allows
28123 clients to download a much smaller amount of directory information.
28124 To disable it (and go back to the old-style consensus and
28125 descriptors), set "UseMicrodescriptors 0" in your torrc file.
28126 - Tor's firewall-helper feature, introduced in 0.2.3.1-alpha (see the
28127 "PortForwarding" config option), now supports Windows.
28128 - When using an exit relay running 0.2.3.x, clients can now
28129 "optimistically" send data before the exit relay reports that
28130 the stream has opened. This saves a round trip when starting
28131 connections where the client speaks first (such as web browsing).
28132 This behavior is controlled by a consensus parameter (currently
28133 disabled). To turn it on or off manually, use the "OptimisticData"
28134 torrc option. Implements proposal 181; code by Ian Goldberg.
28136 o Major bugfixes (bufferevents, fixes on 0.2.3.1-alpha):
28137 - When using IOCP on Windows, we need to enable Libevent windows
28139 - The IOCP backend now works even when the user has not specified
28140 the (internal, debugging-only) _UseFilteringSSLBufferevents option.
28141 Fixes part of bug 3752.
28142 - Correctly record the bytes we've read and written when using
28143 bufferevents, so that we can include them in our bandwidth history
28144 and advertised bandwidth. Fixes bug 3803.
28145 - Apply rate-limiting only at the bottom of a chain of filtering
28146 bufferevents. This prevents us from filling up internal read
28147 buffers and violating rate-limits when filtering bufferevents
28148 are enabled. Fixes part of bug 3804.
28149 - Add high-watermarks to the output buffers for filtered
28150 bufferevents. This prevents us from filling up internal write
28151 buffers and wasting CPU cycles when filtering bufferevents are
28152 enabled. Fixes part of bug 3804.
28153 - Correctly notice when data has been written from a bufferevent
28154 without flushing it completely. Fixes bug 3805.
28155 - Fix a bug where server-side tunneled bufferevent-based directory
28156 streams would get closed prematurely. Fixes bug 3814.
28157 - Fix a use-after-free error with per-connection rate-limiting
28158 buckets. Fixes bug 3888.
28160 o Major bugfixes (also part of 0.2.2.31-rc):
28161 - If we're configured to write our ControlPorts to disk, only write
28162 them after switching UID and creating the data directory. This way,
28163 we don't fail when starting up with a nonexistent DataDirectory
28164 and a ControlPortWriteToFile setting based on that directory. Fixes
28165 bug 3747; bugfix on Tor 0.2.2.26-beta.
28168 - Added a new CONF_CHANGED event so that controllers can be notified
28169 of any configuration changes made by other controllers, or by the
28170 user. Implements ticket 1692.
28171 - Use evbuffer_copyout() in inspect_evbuffer(). This fixes a memory
28172 leak when using bufferevents, and lets Libevent worry about how to
28173 best copy data out of a buffer.
28174 - Replace files in stats/ rather than appending to them. Now that we
28175 include statistics in extra-info descriptors, it makes no sense to
28176 keep old statistics forever. Implements ticket 2930.
28178 o Minor features (build compatibility):
28179 - Limited, experimental support for building with nmake and MSVC.
28180 - Provide a substitute implementation of lround() for MSVC, which
28181 apparently lacks it. Patch from Gisle Vanem.
28183 o Minor features (also part of 0.2.2.31-rc):
28184 - Update to the August 2 2011 Maxmind GeoLite Country database.
28186 o Minor bugfixes (on 0.2.3.x-alpha):
28187 - Fix a spurious warning when parsing SOCKS requests with
28188 bufferevents enabled. Fixes bug 3615; bugfix on 0.2.3.2-alpha.
28189 - Get rid of a harmless warning that could happen on relays running
28190 with bufferevents. The warning was caused by someone doing an http
28191 request to a relay's orport. Also don't warn for a few related
28192 non-errors. Fixes bug 3700; bugfix on 0.2.3.1-alpha.
28194 o Minor bugfixes (on 2.2.x and earlier):
28195 - Correct the man page to explain that HashedControlPassword and
28196 CookieAuthentication can both be set, in which case either method
28197 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
28198 when we decided to allow these config options to both be set. Issue
28199 raised by bug 3898.
28200 - The "--quiet" and "--hush" options now apply not only to Tor's
28201 behavior before logs are configured, but also to Tor's behavior in
28202 the absence of configured logs. Fixes bug 3550; bugfix on
28205 o Minor bugfixes (also part of 0.2.2.31-rc):
28206 - Write several files in text mode, on OSes that distinguish text
28207 mode from binary mode (namely, Windows). These files are:
28208 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
28209 that collect those statistics; 'client_keys' and 'hostname' for
28210 hidden services that use authentication; and (in the tor-gencert
28211 utility) newly generated identity and signing keys. Previously,
28212 we wouldn't specify text mode or binary mode, leading to an
28213 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
28214 the DirRecordUsageByCountry option which would have triggered
28215 the assertion failure was added), although this assertion failure
28216 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
28217 - Selectively disable deprecation warnings on OS X because Lion
28218 started deprecating the shipped copy of openssl. Fixes bug 3643.
28219 - Remove an extra pair of quotation marks around the error
28220 message in control-port STATUS_GENERAL BUG events. Bugfix on
28221 0.1.2.6-alpha; fixes bug 3732.
28222 - When unable to format an address as a string, report its value
28223 as "???" rather than reusing the last formatted address. Bugfix
28226 o Code simplifications and refactoring:
28227 - Rewrite the listener-selection logic so that parsing which ports
28228 we want to listen on is now separate from binding to the ports
28232 - Building Tor with bufferevent support now requires Libevent
28233 2.0.13-stable or later. Previous versions of Libevent had bugs in
28234 SSL-related bufferevents and related issues that would make Tor
28235 work badly with bufferevents. Requiring 2.0.13-stable also allows
28236 Tor with bufferevents to take advantage of Libevent APIs
28237 introduced after 2.0.8-rc.
28240 Changes in version 0.2.2.32 - 2011-08-27
28241 The Tor 0.2.2 release series is dedicated to the memory of Andreas
28242 Pfitzmann (1958-2010), a pioneer in anonymity and privacy research,
28243 a founder of the PETS community, a leader in our field, a mentor,
28244 and a friend. He left us with these words: "I had the possibility
28245 to contribute to this world that is not as it should be. I hope I
28246 could help in some areas to make the world a better place, and that
28247 I could also encourage other people to be engaged in improving the
28248 world. Please, stay engaged. This world needs you, your love, your
28249 initiative -- now I cannot be part of that anymore."
28251 Tor 0.2.2.32, the first stable release in the 0.2.2 branch, is finally
28252 ready. More than two years in the making, this release features improved
28253 client performance and hidden service reliability, better compatibility
28254 for Android, correct behavior for bridges that listen on more than
28255 one address, more extensible and flexible directory object handling,
28256 better reporting of network statistics, improved code security, and
28257 many many other features and bugfixes.
28260 Changes in version 0.2.2.31-rc - 2011-08-17
28261 Tor 0.2.2.31-rc is the second and hopefully final release candidate
28262 for the Tor 0.2.2.x series.
28265 - Remove an extra pair of quotation marks around the error
28266 message in control-port STATUS_GENERAL BUG events. Bugfix on
28267 0.1.2.6-alpha; fixes bug 3732.
28268 - If we're configured to write our ControlPorts to disk, only write
28269 them after switching UID and creating the data directory. This way,
28270 we don't fail when starting up with a nonexistent DataDirectory
28271 and a ControlPortWriteToFile setting based on that directory. Fixes
28272 bug 3747; bugfix on Tor 0.2.2.26-beta.
28275 - Update to the August 2 2011 Maxmind GeoLite Country database.
28278 - Allow GETINFO fingerprint to return a fingerprint even when
28279 we have not yet built a router descriptor. Fixes bug 3577;
28280 bugfix on 0.2.0.1-alpha.
28281 - Write several files in text mode, on OSes that distinguish text
28282 mode from binary mode (namely, Windows). These files are:
28283 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
28284 that collect those statistics; 'client_keys' and 'hostname' for
28285 hidden services that use authentication; and (in the tor-gencert
28286 utility) newly generated identity and signing keys. Previously,
28287 we wouldn't specify text mode or binary mode, leading to an
28288 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
28289 the DirRecordUsageByCountry option which would have triggered
28290 the assertion failure was added), although this assertion failure
28291 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
28292 - Selectively disable deprecation warnings on OS X because Lion
28293 started deprecating the shipped copy of openssl. Fixes bug 3643.
28294 - When unable to format an address as a string, report its value
28295 as "???" rather than reusing the last formatted address. Bugfix
28299 Changes in version 0.2.3.2-alpha - 2011-07-18
28300 Tor 0.2.3.2-alpha introduces two new experimental features:
28301 microdescriptors and pluggable transports. It also continues cleaning
28302 up a variety of recently introduced features.
28305 - Clients can now use microdescriptors instead of regular descriptors
28306 to build circuits. Microdescriptors are authority-generated
28307 summaries of regular descriptors' contents, designed to change
28308 very rarely (see proposal 158 for details). This feature is
28309 designed to save bandwidth, especially for clients on slow internet
28310 connections. It's off by default for now, since nearly no caches
28311 support it, but it will be on-by-default for clients in a future
28312 version. You can use the UseMicrodescriptors option to turn it on.
28313 - Tor clients using bridges can now be configured to use a separate
28314 'transport' proxy for each bridge. This approach helps to resist
28315 censorship by allowing bridges to use protocol obfuscation
28316 plugins. It implements part of proposal 180. Implements ticket 2841.
28317 - While we're trying to bootstrap, record how many TLS connections
28318 fail in each state, and report which states saw the most failures
28319 in response to any bootstrap failures. This feature may speed up
28320 diagnosis of censorship events. Implements ticket 3116.
28322 o Major bugfixes (on 0.2.3.1-alpha):
28323 - When configuring a large set of nodes in EntryNodes (as with
28324 'EntryNodes {cc}' or 'EntryNodes 1.1.1.1/16'), choose only a
28325 random subset to be guards, and choose them in random
28326 order. Fixes bug 2798.
28327 - Tor could crash when remembering a consensus in a non-used consensus
28328 flavor without having a current consensus set. Fixes bug 3361.
28329 - Comparing an unknown address to a microdescriptor's shortened exit
28330 policy would always give a "rejected" result. Fixes bug 3599.
28331 - Using microdescriptors as a client no longer prevents Tor from
28332 uploading and downloading hidden service descriptors. Fixes
28336 - Allow nameservers with IPv6 address. Resolves bug 2574.
28337 - Accept attempts to include a password authenticator in the
28338 handshake, as supported by SOCKS5. This handles SOCKS clients that
28339 don't know how to omit a password when authenticating. Resolves
28341 - When configuring a large set of nodes in EntryNodes, and there are
28342 enough of them listed as Guard so that we don't need to consider
28343 the non-guard entries, prefer the ones listed with the Guard flag.
28344 - Check for and recover from inconsistency in the microdescriptor
28345 cache. This will make it harder for us to accidentally free a
28346 microdescriptor without removing it from the appropriate data
28347 structures. Fixes issue 3135; issue noted by "wanoskarnet".
28348 - Log SSL state transitions at log level DEBUG, log domain
28349 HANDSHAKE. This can be useful for debugging censorship events.
28350 Implements ticket 3264.
28351 - Add port 6523 (Gobby) to LongLivedPorts. Patch by intrigeri;
28352 implements ticket 3439.
28354 o Minor bugfixes (on 0.2.3.1-alpha):
28355 - Do not free all general-purpose regular descriptors just
28356 because microdescriptor use is enabled. Fixes bug 3113.
28357 - Correctly link libevent_openssl when --enable-static-libevent
28358 is passed to configure. Fixes bug 3118.
28359 - Bridges should not complain during their heartbeat log messages that
28360 they are unlisted in the consensus: that's more or less the point
28361 of being a bridge. Fixes bug 3183.
28362 - Report a SIGNAL event to controllers when acting on a delayed
28363 SIGNAL NEWNYM command. Previously, we would report a SIGNAL
28364 event to the controller if we acted on a SIGNAL NEWNYM command
28365 immediately, and otherwise not report a SIGNAL event for the
28366 command at all. Fixes bug 3349.
28367 - Fix a crash when handling the SIGNAL controller command or
28368 reporting ERR-level status events with bufferevents enabled. Found
28369 by Robert Ransom. Fixes bug 3367.
28370 - Always ship the tor-fw-helper manpage in our release tarballs.
28371 Fixes bug 3389. Reported by Stephen Walker.
28372 - Fix a class of double-mark-for-close bugs when bufferevents
28373 are enabled. Fixes bug 3403.
28374 - Update tor-fw-helper to support libnatpmp-20110618. Fixes bug 3434.
28375 - Add SIGNAL to the list returned by the 'GETINFO events/names'
28376 control-port command. Fixes part of bug 3465.
28377 - Prevent using negative indices during unit test runs when read_all()
28378 fails. Spotted by coverity.
28379 - Fix a rare memory leak when checking the nodelist without it being
28380 present. Found by coverity.
28381 - Only try to download a microdescriptor-flavored consensus from
28382 a directory cache that provides them.
28384 o Minor bugfixes (on 0.2.2.x and earlier):
28385 - Assert that hidden-service-related operations are not performed
28386 using single-hop circuits. Previously, Tor would assert that
28387 client-side streams are not attached to single-hop circuits,
28388 but not that other sensitive operations on the client and service
28389 side are not performed using single-hop circuits. Fixes bug 3332;
28391 - Don't publish a new relay descriptor when we reload our onion key,
28392 unless the onion key has actually changed. Fixes bug 3263 and
28393 resolves another cause of bug 1810. Bugfix on 0.1.1.11-alpha.
28394 - Allow GETINFO fingerprint to return a fingerprint even when
28395 we have not yet built a router descriptor. Fixes bug 3577;
28396 bugfix on 0.2.0.1-alpha.
28397 - Make 'tor --digests' list hashes of all Tor source files. Bugfix
28398 on 0.2.2.4-alpha; fixes bug 3427.
28400 o Code simplification and refactoring:
28401 - Use tor_sscanf() in place of scanf() in more places through the
28402 code. This makes us a little more locale-independent, and
28403 should help shut up code-analysis tools that can't tell
28404 a safe sscanf string from a dangerous one.
28405 - Use tt_assert(), not tor_assert(), for checking for test failures.
28406 This makes the unit tests more able to go on in the event that
28408 - Split connection_about_to_close() into separate functions for each
28412 - On Windows, we now define the _WIN32_WINNT macros only if they
28413 are not already defined. This lets the person building Tor decide,
28414 if they want, to require a later version of Windows.
28417 Changes in version 0.2.2.30-rc - 2011-07-07
28418 Tor 0.2.2.30-rc is the first release candidate for the Tor 0.2.2.x
28419 series. It fixes a few smaller bugs, but generally appears stable.
28420 Please test it and let us know whether it is!
28423 - Send a SUCCEEDED stream event to the controller when a reverse
28424 resolve succeeded. Fixes bug 3536; bugfix on 0.0.8pre1. Issue
28425 discovered by katmagic.
28426 - Always NUL-terminate the sun_path field of a sockaddr_un before
28427 passing it to the kernel. (Not a security issue: kernels are
28428 smart enough to reject bad sockaddr_uns.) Found by Coverity;
28429 CID #428. Bugfix on Tor 0.2.0.3-alpha.
28430 - Don't stack-allocate the list of supplementary GIDs when we're
28431 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
28432 could take up to 256K, which is way too much stack. Found by
28433 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
28434 - Add BUILDTIMEOUT_SET to the list returned by the 'GETINFO
28435 events/names' control-port command. Bugfix on 0.2.2.9-alpha;
28436 fixes part of bug 3465.
28437 - Fix a memory leak when receiving a descriptor for a hidden
28438 service we didn't ask for. Found by Coverity; CID #30. Bugfix
28442 - Update to the July 1 2011 Maxmind GeoLite Country database.
28445 Changes in version 0.2.2.29-beta - 2011-06-20
28446 Tor 0.2.2.29-beta reverts an accidental behavior change for users who
28447 have bridge lines in their torrc but don't want to use them; gets
28448 us closer to having the control socket feature working on Debian;
28449 and fixes a variety of smaller bugs.
28452 - Revert the UseBridges option to its behavior before 0.2.2.28-beta.
28453 When we changed the default behavior to "use bridges if any
28454 are listed in the torrc", we surprised users who had bridges
28455 in their torrc files but who didn't actually want to use them.
28456 Partial resolution for bug 3354.
28459 - Don't attach new streams to old rendezvous circuits after SIGNAL
28460 NEWNYM. Previously, we would keep using an existing rendezvous
28461 circuit if it remained open (i.e. if it were kept open by a
28462 long-lived stream, or if a new stream were attached to it before
28463 Tor could notice that it was old and no longer in use). Bugfix on
28464 0.1.1.15-rc; fixes bug 3375.
28467 - Fix a bug when using ControlSocketsGroupWritable with User. The
28468 directory's group would be checked against the current group, not
28469 the configured group. Patch by Jérémy Bobbio. Fixes bug 3393;
28470 bugfix on 0.2.2.26-beta.
28471 - Make connection_printf_to_buf()'s behavior sane. Its callers
28472 expect it to emit a CRLF iff the format string ends with CRLF;
28473 it actually emitted a CRLF iff (a) the format string ended with
28474 CRLF or (b) the resulting string was over 1023 characters long or
28475 (c) the format string did not end with CRLF *and* the resulting
28476 string was 1021 characters long or longer. Bugfix on 0.1.1.9-alpha;
28477 fixes part of bug 3407.
28478 - Make send_control_event_impl()'s behavior sane. Its callers
28479 expect it to always emit a CRLF at the end of the string; it
28480 might have emitted extra control characters as well. Bugfix on
28481 0.1.1.9-alpha; fixes another part of bug 3407.
28482 - Make crypto_rand_int() check the value of its input correctly.
28483 Previously, it accepted values up to UINT_MAX, but could return a
28484 negative number if given a value above INT_MAX+1. Found by George
28485 Kadianakis. Fixes bug 3306; bugfix on 0.2.2pre14.
28486 - Avoid a segfault when reading a malformed circuit build state
28487 with more than INT_MAX entries. Found by wanoskarnet. Bugfix on
28489 - When asked about a DNS record type we don't support via a
28490 client DNSPort, reply with NOTIMPL rather than an empty
28491 reply. Patch by intrigeri. Fixes bug 3369; bugfix on 2.0.1-alpha.
28492 - Fix a rare memory leak during stats writing. Found by coverity.
28495 - Update to the June 1 2011 Maxmind GeoLite Country database.
28497 o Code simplifications and refactoring:
28498 - Remove some dead code as indicated by coverity.
28499 - Remove a few dead assignments during router parsing. Found by
28501 - Add some forgotten return value checks during unit tests. Found
28503 - Don't use 1-bit wide signed bit fields. Found by coverity.
28506 Changes in version 0.2.2.28-beta - 2011-06-04
28507 Tor 0.2.2.28-beta makes great progress towards a new stable release: we
28508 fixed a big bug in whether relays stay in the consensus consistently,
28509 we moved closer to handling bridges and hidden services correctly,
28510 and we started the process of better handling the dreaded "my Vidalia
28511 died, and now my Tor demands a password when I try to reconnect to it"
28515 - Don't decide to make a new descriptor when receiving a HUP signal.
28516 This bug has caused a lot of 0.2.2.x relays to disappear from the
28517 consensus periodically. Fixes the most common case of triggering
28518 bug 1810; bugfix on 0.2.2.7-alpha.
28519 - Actually allow nameservers with IPv6 addresses. Fixes bug 2574.
28520 - Don't try to build descriptors if "ORPort auto" is set and we
28521 don't know our actual ORPort yet. Fix for bug 3216; bugfix on
28523 - Resolve a crash that occurred when setting BridgeRelay to 1 with
28524 accounting enabled. Fixes bug 3228; bugfix on 0.2.2.18-alpha.
28525 - Apply circuit timeouts to opened hidden-service-related circuits
28526 based on the correct start time. Previously, we would apply the
28527 circuit build timeout based on time since the circuit's creation;
28528 it was supposed to be applied based on time since the circuit
28529 entered its current state. Bugfix on 0.0.6; fixes part of bug 1297.
28530 - Use the same circuit timeout for client-side introduction
28531 circuits as for other four-hop circuits, rather than the timeout
28532 for single-hop directory-fetch circuits; the shorter timeout may
28533 have been appropriate with the static circuit build timeout in
28534 0.2.1.x and earlier, but caused many hidden service access attempts
28535 to fail with the adaptive CBT introduced in 0.2.2.2-alpha. Bugfix
28536 on 0.2.2.2-alpha; fixes another part of bug 1297.
28537 - In ticket 2511 we fixed a case where you could use an unconfigured
28538 bridge if you had configured it as a bridge the last time you ran
28539 Tor. Now fix another edge case: if you had configured it as a bridge
28540 but then switched to a different bridge via the controller, you
28541 would still be willing to use the old one. Bugfix on 0.2.0.1-alpha;
28545 - Add an __OwningControllerProcess configuration option and a
28546 TAKEOWNERSHIP control-port command. Now a Tor controller can ensure
28547 that when it exits, Tor will shut down. Implements feature 3049.
28548 - If "UseBridges 1" is set and no bridges are configured, Tor will
28549 now refuse to build any circuits until some bridges are set.
28550 If "UseBridges auto" is set, Tor will use bridges if they are
28551 configured and we are not running as a server, but otherwise will
28552 make circuits as usual. The new default is "auto". Patch by anonym,
28553 so the Tails LiveCD can stop automatically revealing you as a Tor
28557 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
28558 - Remove a trailing asterisk from "exit-policy/default" in the
28559 output of the control port command "GETINFO info/names". Bugfix
28561 - Use a wide type to hold sockets when built for 64-bit Windows builds.
28563 - Warn when the user configures two HiddenServiceDir lines that point
28564 to the same directory. Bugfix on 0.0.6 (the version introducing
28565 HiddenServiceDir); fixes bug 3289.
28566 - Remove dead code from rend_cache_lookup_v2_desc_as_dir. Fixes
28567 part of bug 2748; bugfix on 0.2.0.10-alpha.
28568 - Log malformed requests for rendezvous descriptors as protocol
28569 warnings, not warnings. Also, use a more informative log message
28570 in case someone sees it at log level warning without prior
28571 info-level messages. Fixes the other part of bug 2748; bugfix
28573 - Clear the table recording the time of the last request for each
28574 hidden service descriptor from each HS directory on SIGNAL NEWNYM.
28575 Previously, we would clear our HS descriptor cache on SIGNAL
28576 NEWNYM, but if we had previously retrieved a descriptor (or tried
28577 to) from every directory responsible for it, we would refuse to
28578 fetch it again for up to 15 minutes. Bugfix on 0.2.2.25-alpha;
28580 - Fix a log message that said "bits" while displaying a value in
28581 bytes. Found by wanoskarnet. Fixes bug 3318; bugfix on
28583 - When checking for 1024-bit keys, check for 1024 bits, not 128
28584 bytes. This allows Tor to correctly discard keys of length 1017
28585 through 1023. Bugfix on 0.0.9pre5.
28588 - Relays now log the reason for publishing a new relay descriptor,
28589 so we have a better chance of hunting down instances of bug 1810.
28590 Resolves ticket 3252.
28591 - Revise most log messages that refer to nodes by nickname to
28592 instead use the "$key=nickname at address" format. This should be
28593 more useful, especially since nicknames are less and less likely
28594 to be unique. Resolves ticket 3045.
28595 - Log (at info level) when purging pieces of hidden-service-client
28596 state because of SIGNAL NEWNYM.
28599 - Remove undocumented option "-F" from tor-resolve: it hasn't done
28600 anything since 0.2.1.16-rc.
28603 Changes in version 0.2.2.27-beta - 2011-05-18
28604 Tor 0.2.2.27-beta fixes a bridge-related stability bug in the previous
28605 release, and also adds a few more general bugfixes.
28608 - Fix a crash bug when changing bridges in a running Tor process.
28609 Fixes bug 3213; bugfix on 0.2.2.26-beta.
28610 - When the controller configures a new bridge, don't wait 10 to 60
28611 seconds before trying to fetch its descriptor. Bugfix on
28612 0.2.0.3-alpha; fixes bug 3198 (suggested by 2355).
28615 - Require that onion keys have exponent 65537 in microdescriptors too.
28616 Fixes more of bug 3207; bugfix on 0.2.2.26-beta.
28617 - Tor used to limit HttpProxyAuthenticator values to 48 characters.
28618 Changed the limit to 512 characters by removing base64 newlines.
28619 Fixes bug 2752. Fix by Michael Yakubovich.
28620 - When a client starts or stops using bridges, never use a circuit
28621 that was built before the configuration change. This behavior could
28622 put at risk a user who uses bridges to ensure that her traffic
28623 only goes to the chosen addresses. Bugfix on 0.2.0.3-alpha; fixes
28627 Changes in version 0.2.2.26-beta - 2011-05-17
28628 Tor 0.2.2.26-beta fixes a variety of potential privacy problems. It
28629 also introduces a new "socksport auto" approach that should make it
28630 easier to run multiple Tors on the same system, and does a lot of
28631 cleanup to get us closer to a release candidate.
28633 o Security/privacy fixes:
28634 - Replace all potentially sensitive memory comparison operations
28635 with versions whose runtime does not depend on the data being
28636 compared. This will help resist a class of attacks where an
28637 adversary can use variations in timing information to learn
28638 sensitive data. Fix for one case of bug 3122. (Safe memcmp
28639 implementation by Robert Ransom based partially on code by DJB.)
28640 - When receiving a hidden service descriptor, check that it is for
28641 the hidden service we wanted. Previously, Tor would store any
28642 hidden service descriptors that a directory gave it, whether it
28643 wanted them or not. This wouldn't have let an attacker impersonate
28644 a hidden service, but it did let directories pre-seed a client
28645 with descriptors that it didn't want. Bugfix on 0.0.6.
28646 - On SIGHUP, do not clear out all TrackHostExits mappings, client
28647 DNS cache entries, and virtual address mappings: that's what
28648 NEWNYM is for. Fixes bug 1345; bugfix on 0.1.0.1-rc.
28651 - The options SocksPort, ControlPort, and so on now all accept a
28652 value "auto" that opens a socket on an OS-selected port. A
28653 new ControlPortWriteToFile option tells Tor to write its
28654 actual control port or ports to a chosen file. If the option
28655 ControlPortFileGroupReadable is set, the file is created as
28656 group-readable. Now users can run two Tor clients on the same
28657 system without needing to manually mess with parameters. Resolves
28658 part of ticket 3076.
28659 - Set SO_REUSEADDR on all sockets, not just listeners. This should
28660 help busy exit nodes avoid running out of useable ports just
28661 because all the ports have been used in the near past. Resolves
28665 - New "GETINFO net/listeners/(type)" controller command to return
28666 a list of addresses and ports that are bound for listeners for a
28667 given connection type. This is useful when the user has configured
28668 "SocksPort auto" and the controller needs to know which port got
28669 chosen. Resolves another part of ticket 3076.
28670 - Add a new ControlSocketsGroupWritable configuration option: when
28671 it is turned on, ControlSockets are group-writeable by the default
28672 group of the current user. Patch by Jérémy Bobbio; implements
28674 - Tor now refuses to create a ControlSocket in a directory that is
28675 world-readable (or group-readable if ControlSocketsGroupWritable
28676 is 0). This is necessary because some operating systems do not
28677 enforce permissions on an AF_UNIX sockets. Permissions on the
28678 directory holding the socket, however, seems to work everywhere.
28679 - Rate-limit a warning about failures to download v2 networkstatus
28680 documents. Resolves part of bug 1352.
28681 - Backport code from 0.2.3.x that allows directory authorities to
28682 clean their microdescriptor caches. Needed to resolve bug 2230.
28683 - When an HTTPS proxy reports "403 Forbidden", we now explain
28684 what it means rather than calling it an unexpected status code.
28685 Closes bug 2503. Patch from Michael Yakubovich.
28686 - Update to the May 1 2011 Maxmind GeoLite Country database.
28689 - Authorities now clean their microdesc cache periodically and when
28690 reading from disk initially, not only when adding new descriptors.
28691 This prevents a bug where we could lose microdescriptors. Bugfix
28692 on 0.2.2.6-alpha. Fixes bug 2230.
28693 - Do not crash when our configuration file becomes unreadable, for
28694 example due to a permissions change, between when we start up
28695 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
28697 - Avoid a bug that would keep us from replacing a microdescriptor
28698 cache on Windows. (We would try to replace the file while still
28699 holding it open. That's fine on Unix, but Windows doesn't let us
28700 do that.) Bugfix on 0.2.2.6-alpha; bug found by wanoskarnet.
28701 - Add missing explanations for the authority-related torrc options
28702 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey in the
28703 man page. Resolves issue 2379.
28704 - As an authority, do not upload our own vote or signature set to
28705 ourself. It would tell us nothing new, and as of 0.2.2.24-alpha,
28706 it would get flagged as a duplicate. Resolves bug 3026.
28707 - Accept hidden service descriptors if we think we might be a hidden
28708 service directory, regardless of what our consensus says. This
28709 helps robustness, since clients and hidden services can sometimes
28710 have a more up-to-date view of the network consensus than we do,
28711 and if they think that the directory authorities list us a HSDir,
28712 we might actually be one. Related to bug 2732; bugfix on
28714 - When a controller changes TrackHostExits, remove mappings for
28715 hosts that should no longer have their exits tracked. Bugfix on
28717 - When a controller changes VirtualAddrNetwork, remove any mappings
28718 for hosts that were automapped to the old network. Bugfix on
28720 - When a controller changes one of the AutomapHosts* options, remove
28721 any mappings for hosts that should no longer be automapped. Bugfix
28723 - Do not reset the bridge descriptor download status every time we
28724 re-parse our configuration or get a configuration change. Fixes
28725 bug 3019; bugfix on 0.2.0.3-alpha.
28727 o Minor bugfixes (code cleanup):
28728 - When loading the microdesc journal, remember its current size.
28729 In 0.2.2, this helps prevent the microdesc journal from growing
28730 without limit on authorities (who are the only ones to use it in
28731 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
28732 Fix posted by "cypherpunks."
28733 - The microdesc journal is supposed to get rebuilt only if it is
28734 at least _half_ the length of the store, not _twice_ the length
28735 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
28736 - Fix a potential null-pointer dereference while computing a
28737 consensus. Bugfix on 0.2.0.3-alpha, found with the help of
28739 - Avoid a possible null-pointer dereference when rebuilding the mdesc
28740 cache without actually having any descriptors to cache. Bugfix on
28741 0.2.2.6-alpha. Issue discovered using clang's static analyzer.
28742 - If we fail to compute the identity digest of a v3 legacy keypair,
28743 warn, and don't use a buffer-full of junk instead. Bugfix on
28744 0.2.1.1-alpha; fixes bug 3106.
28745 - Resolve an untriggerable issue in smartlist_string_num_isin(),
28746 where if the function had ever in the future been used to check
28747 for the presence of a too-large number, it would have given an
28748 incorrect result. (Fortunately, we only used it for 16-bit
28749 values.) Fixes bug 3175; bugfix on 0.1.0.1-rc.
28750 - Require that introduction point keys and onion handshake keys
28751 have a public exponent of 65537. Starts to fix bug 3207; bugfix
28754 o Removed features:
28755 - Caches no longer download and serve v2 networkstatus documents
28756 unless FetchV2Networkstatus flag is set: these documents haven't
28757 haven't been used by clients or relays since 0.2.0.x. Resolves
28761 Changes in version 0.2.3.1-alpha - 2011-05-05
28762 Tor 0.2.3.1-alpha adds some new experimental features, including support
28763 for an improved network IO backend, IOCP networking on Windows,
28764 microdescriptor caching, "fast-start" support for streams, and automatic
28765 home router configuration. There are also numerous internal improvements
28766 to try to make the code easier for developers to work with.
28768 This is the first alpha release in a new series, so expect there to be
28769 bugs. Users who would rather test out a more stable branch should
28770 stay with 0.2.2.x for now.
28773 - Tor can now optionally build with the "bufferevents" buffered IO
28774 backend provided by Libevent 2. To use this feature, make sure you
28775 have the latest possible version of Libevent, and pass the
28776 --enable-bufferevents flag to configure when building Tor from
28777 source. This feature will make our networking code more flexible,
28778 let us stack layers on each other, and let us use more efficient
28779 zero-copy transports where available.
28780 - As an experimental feature, Tor can use IOCP for networking on Windows.
28781 Once this code is tuned and optimized, it promises much better
28782 performance than the select-based backend we've used in the past. To
28783 try this feature, you must build Tor with Libevent 2, configure Tor
28784 with the "bufferevents" buffered IO backend, and add "DisableIOCP 0" to
28785 your torrc. There are known bugs here: only try this if you can help
28786 debug it as it breaks.
28787 - The EntryNodes option can now include country codes like {de} or IP
28788 addresses or network masks. Previously we had disallowed these options
28789 because we didn't have an efficient way to keep the list up to
28790 date. Fixes bug 1982, but see bug 2798 for an unresolved issue here.
28791 - Exit nodes now accept and queue data on not-yet-connected streams.
28792 Previously, the client wasn't allowed to send data until the stream was
28793 connected, which slowed down all connections. This change will enable
28794 clients to perform a "fast-start" on streams and send data without
28795 having to wait for a confirmation that the stream has opened. (Patch
28796 from Ian Goldberg; implements the server side of Proposal 174.)
28797 - Tor now has initial support for automatic port mapping on the many
28798 home routers that support NAT-PMP or UPnP. (Not yet supported on
28799 Windows). To build the support code, you'll need to have libnatpnp
28800 library and/or the libminiupnpc library, and you'll need to enable the
28801 feature specifically by passing "--enable-upnp" and/or
28802 "--enable-natpnp" to configure. To turn it on, use the new
28803 PortForwarding option.
28804 - Caches now download, cache, and serve multiple "flavors" of the
28805 consensus, including a flavor that describes microdescriptors.
28806 - Caches now download, cache, and serve microdescriptors -- small
28807 summaries of router descriptors that are authenticated by all of the
28808 directory authorities. Once enough caches are running this code,
28809 clients will be able to save significant amounts of directory bandwidth
28810 by downloading microdescriptors instead of router descriptors.
28813 - Make logging resolution configurable with a new LogTimeGranularity
28814 option, and change the default from 1 millisecond to 1 second.
28815 Implements enhancement 1668.
28816 - We log which torrc file we're using on startup. Implements ticket
28818 - Ordinarily, Tor does not count traffic from private addresses (like
28819 127.0.0.1 or 10.0.0.1) when calculating rate limits or accounting.
28820 There is now a new option, CountPrivateBandwidth, to disable this
28821 behavior. Patch from Daniel Cagara.
28822 - New --enable-static-tor configure option for building Tor as
28823 statically as possible. Idea, general hackery and thoughts from
28824 Alexei Czeskis, John Gilmore, Jacob Appelbaum. Implements ticket
28826 - If you set the NumCPUs option to 0, Tor will now try to detect how
28827 many CPUs you have. This is the new default behavior.
28828 - Turn on directory request statistics by default and include them in
28829 extra-info descriptors. Don't break if we have no GeoIP database.
28830 - Relays that set "ConnDirectionStatistics 1" write statistics on the
28831 bidirectional use of connections to disk every 24 hours.
28832 - Add a GeoIP file digest to the extra-info descriptor. Implements
28834 - The NodeFamily option -- which let you declare that you want to
28835 consider nodes to be part of a family whether they list themselves
28836 that way or not -- now allows IP address ranges and country codes.
28837 - Add a new 'Heartbeat' log message type to periodically log a message
28838 describing Tor's status at level Notice. This feature is meant for
28839 operators who log at notice, and want to make sure that their Tor
28840 server is still working. Implementation by George Kadianakis.
28842 o Minor bugfixes (on 0.2.2.25-alpha):
28843 - When loading the microdesc journal, remember its current size.
28844 In 0.2.2, this helps prevent the microdesc journal from growing
28845 without limit on authorities (who are the only ones to use it in
28846 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
28847 Fix posted by "cypherpunks."
28848 - The microdesc journal is supposed to get rebuilt only if it is
28849 at least _half_ the length of the store, not _twice_ the length
28850 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
28851 - If as an authority we fail to compute the identity digest of a v3
28852 legacy keypair, warn, and don't use a buffer-full of junk instead.
28853 Bugfix on 0.2.1.1-alpha; fixes bug 3106.
28854 - Authorities now clean their microdesc cache periodically and when
28855 reading from disk initially, not only when adding new descriptors.
28856 This prevents a bug where we could lose microdescriptors. Bugfix
28859 o Minor features (controller):
28860 - Add a new SIGNAL event to the controller interface so that
28861 controllers can be notified when Tor handles a signal. Resolves
28862 issue 1955. Patch by John Brooks.
28863 - Add a new GETINFO option to get total bytes read and written. Patch
28864 from pipe, revised by atagar. Resolves ticket 2345.
28865 - Implement some GETINFO controller fields to provide information about
28866 the Tor process's pid, euid, username, and resource limits.
28869 - Our build system requires automake 1.6 or later to create the
28870 Makefile.in files. Previously, you could have used 1.4.
28871 This only affects developers and people building Tor from git;
28872 people who build Tor from the source distribution without changing
28873 the Makefile.am files should be fine.
28874 - Our autogen.sh script uses autoreconf to launch autoconf, automake, and
28875 so on. This is more robust against some of the failure modes
28876 associated with running the autotools pieces on their own.
28878 o Minor packaging issues:
28879 - On OpenSUSE, create the /var/run/tor directory on startup if it is not
28880 already created. Patch from Andreas Stieger. Fixes bug 2573.
28882 o Code simplifications and refactoring:
28883 - A major revision to our internal node-selecting and listing logic.
28884 Tor already had at least two major ways to look at the question of
28885 "which Tor servers do we know about": a list of router descriptors,
28886 and a list of entries in the current consensus. With
28887 microdescriptors, we're adding a third. Having so many systems
28888 without an abstraction layer over them was hurting the codebase.
28889 Now, we have a new "node_t" abstraction that presents a consistent
28890 interface to a client's view of a Tor node, and holds (nearly) all
28891 of the mutable state formerly in routerinfo_t and routerstatus_t.
28892 - The helper programs tor-gencert, tor-resolve, and tor-checkkey
28893 no longer link against Libevent: they never used it, but
28894 our library structure used to force them to link it.
28896 o Removed features:
28897 - Remove some old code to work around even older versions of Tor that
28898 used forked processes to handle DNS requests. Such versions of Tor
28899 are no longer in use as servers.
28901 o Documentation fixes:
28902 - Correct a broken faq link in the INSTALL file. Fixes bug 2307.
28903 - Add missing documentation for the authority-related torrc options
28904 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey. Resolves
28908 Changes in version 0.2.2.25-alpha - 2011-04-29
28909 Tor 0.2.2.25-alpha fixes many bugs: hidden service clients are more
28910 robust, routers no longer overreport their bandwidth, Win7 should crash
28911 a little less, and NEWNYM (as used by Vidalia's "new identity" button)
28912 now prevents hidden service-related activity from being linkable. It
28913 provides more information to Vidalia so you can see if your bridge is
28914 working. Also, 0.2.2.25-alpha revamps the Entry/Exit/ExcludeNodes and
28915 StrictNodes configuration options to make them more reliable, more
28916 understandable, and more regularly applied. If you use those options,
28917 please see the revised documentation for them in the manual page.
28920 - Relays were publishing grossly inflated bandwidth values because
28921 they were writing their state files wrong--now they write the
28922 correct value. Also, resume reading bandwidth history from the
28923 state file correctly. Fixes bug 2704; bugfix on 0.2.2.23-alpha.
28924 - Improve hidden service robustness: When we find that we have
28925 extended a hidden service's introduction circuit to a relay not
28926 listed as an introduction point in the HS descriptor we currently
28927 have, retry with an introduction point from the current
28928 descriptor. Previously we would just give up. Fixes bugs 1024 and
28929 1930; bugfix on 0.2.0.10-alpha.
28930 - Clients now stop trying to use an exit node associated with a given
28931 destination by TrackHostExits if they fail to reach that exit node.
28932 Fixes bug 2999. Bugfix on 0.2.0.20-rc.
28933 - Fix crash bug on platforms where gmtime and localtime can return
28934 NULL. Windows 7 users were running into this one. Fixes part of bug
28935 2077. Bugfix on all versions of Tor. Found by boboper.
28937 o Security and stability fixes:
28938 - Don't double-free a parsable, but invalid, microdescriptor, even if
28939 it is followed in the blob we're parsing by an unparsable
28940 microdescriptor. Fixes an issue reported in a comment on bug 2954.
28941 Bugfix on 0.2.2.6-alpha; fix by "cypherpunks".
28942 - If the Nickname configuration option isn't given, Tor would pick a
28943 nickname based on the local hostname as the nickname for a relay.
28944 Because nicknames are not very important in today's Tor and the
28945 "Unnamed" nickname has been implemented, this is now problematic
28946 behavior: It leaks information about the hostname without being
28947 useful at all. Fixes bug 2979; bugfix on 0.1.2.2-alpha, which
28948 introduced the Unnamed nickname. Reported by tagnaq.
28949 - Fix an uncommon assertion failure when running with DNSPort under
28950 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
28951 - Avoid linkability based on cached hidden service descriptors: forget
28952 all hidden service descriptors cached as a client when processing a
28953 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
28956 - Export GeoIP information on bridge usage to controllers even if we
28957 have not yet been running for 24 hours. Now Vidalia bridge operators
28958 can get more accurate and immediate feedback about their
28959 contributions to the network.
28961 o Major features and bugfixes (node selection):
28962 - Revise and reconcile the meaning of the ExitNodes, EntryNodes,
28963 ExcludeEntryNodes, ExcludeExitNodes, ExcludeNodes, and StrictNodes
28964 options. Previously, we had been ambiguous in describing what
28965 counted as an "exit" node, and what operations exactly "StrictNodes
28966 0" would permit. This created confusion when people saw nodes built
28967 through unexpected circuits, and made it hard to tell real bugs from
28968 surprises. Now the intended behavior is:
28969 . "Exit", in the context of ExitNodes and ExcludeExitNodes, means
28970 a node that delivers user traffic outside the Tor network.
28971 . "Entry", in the context of EntryNodes, means a node used as the
28972 first hop of a multihop circuit. It doesn't include direct
28973 connections to directory servers.
28974 . "ExcludeNodes" applies to all nodes.
28975 . "StrictNodes" changes the behavior of ExcludeNodes only. When
28976 StrictNodes is set, Tor should avoid all nodes listed in
28977 ExcludeNodes, even when it will make user requests fail. When
28978 StrictNodes is *not* set, then Tor should follow ExcludeNodes
28979 whenever it can, except when it must use an excluded node to
28980 perform self-tests, connect to a hidden service, provide a
28981 hidden service, fulfill a .exit request, upload directory
28982 information, or fetch directory information.
28983 Collectively, the changes to implement the behavior fix bug 1090.
28984 - ExcludeNodes now takes precedence over EntryNodes and ExitNodes: if
28985 a node is listed in both, it's treated as excluded.
28986 - ExcludeNodes now applies to directory nodes -- as a preference if
28987 StrictNodes is 0, or an absolute requirement if StrictNodes is 1.
28988 Don't exclude all the directory authorities and set StrictNodes to 1
28989 unless you really want your Tor to break.
28990 - ExcludeNodes and ExcludeExitNodes now override exit enclaving.
28991 - ExcludeExitNodes now overrides .exit requests.
28992 - We don't use bridges listed in ExcludeNodes.
28993 - When StrictNodes is 1:
28994 . We now apply ExcludeNodes to hidden service introduction points
28995 and to rendezvous points selected by hidden service users. This
28996 can make your hidden service less reliable: use it with caution!
28997 . If we have used ExcludeNodes on ourself, do not try relay
28998 reachability self-tests.
28999 . If we have excluded all the directory authorities, we will not
29000 even try to upload our descriptor if we're a relay.
29001 . Do not honor .exit requests to an excluded node.
29002 - Remove a misfeature that caused us to ignore the Fast/Stable flags
29003 when ExitNodes is set. Bugfix on 0.2.2.7-alpha.
29004 - When the set of permitted nodes changes, we now remove any mappings
29005 introduced via TrackExitHosts to now-excluded nodes. Bugfix on
29007 - We never cannibalize a circuit that had excluded nodes on it, even
29008 if StrictNodes is 0. Bugfix on 0.1.0.1-rc.
29009 - Revert a change where we would be laxer about attaching streams to
29010 circuits than when building the circuits. This was meant to prevent
29011 a set of bugs where streams were never attachable, but our improved
29012 code here should make this unnecessary. Bugfix on 0.2.2.7-alpha.
29013 - Keep track of how many times we launch a new circuit to handle a
29014 given stream. Too many launches could indicate an inconsistency
29015 between our "launch a circuit to handle this stream" logic and our
29016 "attach this stream to one of the available circuits" logic.
29017 - Improve log messages related to excluded nodes.
29020 - Fix a spurious warning when moving from a short month to a long
29021 month on relays with month-based BandwidthAccounting. Bugfix on
29022 0.2.2.17-alpha; fixes bug 3020.
29023 - When a client finds that an origin circuit has run out of 16-bit
29024 stream IDs, we now mark it as unusable for new streams. Previously,
29025 we would try to close the entire circuit. Bugfix on 0.0.6.
29026 - Add a forgotten cast that caused a compile warning on OS X 10.6.
29027 Bugfix on 0.2.2.24-alpha.
29028 - Be more careful about reporting the correct error from a failed
29029 connect() system call. Under some circumstances, it was possible to
29030 look at an incorrect value for errno when sending the end reason.
29031 Bugfix on 0.1.0.1-rc.
29032 - Correctly handle an "impossible" overflow cases in connection byte
29033 counting, where we write or read more than 4GB on an edge connection
29034 in a single second. Bugfix on 0.1.2.8-beta.
29035 - Correct the warning displayed when a rendezvous descriptor exceeds
29036 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
29038 - Clients and hidden services now use HSDir-flagged relays for hidden
29039 service descriptor downloads and uploads even if the relays have no
29040 DirPort set and the client has disabled TunnelDirConns. This will
29041 eventually allow us to give the HSDir flag to relays with no
29042 DirPort. Fixes bug 2722; bugfix on 0.2.1.6-alpha.
29043 - Downgrade "no current certificates known for authority" message from
29044 Notice to Info. Fixes bug 2899; bugfix on 0.2.0.10-alpha.
29045 - Make the SIGNAL DUMP control-port command work on FreeBSD. Fixes bug
29046 2917. Bugfix on 0.1.1.1-alpha.
29047 - Only limit the lengths of single HS descriptors, even when multiple
29048 HS descriptors are published to an HSDir relay in a single POST
29049 operation. Fixes bug 2948; bugfix on 0.2.1.5-alpha. Found by hsdir.
29050 - Write the current time into the LastWritten line in our state file,
29051 rather than the time from the previous write attempt. Also, stop
29052 trying to use a time of -1 in our log statements. Fixes bug 3039;
29053 bugfix on 0.2.2.14-alpha.
29054 - Be more consistent in our treatment of file system paths. "~" should
29055 get expanded to the user's home directory in the Log config option.
29056 Fixes bug 2971; bugfix on 0.2.0.1-alpha, which introduced the
29057 feature for the -f and --DataDirectory options.
29060 - Make sure every relay writes a state file at least every 12 hours.
29061 Previously, a relay could go for weeks without writing its state
29062 file, and on a crash could lose its bandwidth history, capacity
29063 estimates, client country statistics, and so on. Addresses bug 3012.
29064 - Send END_STREAM_REASON_NOROUTE in response to EHOSTUNREACH errors.
29065 Clients before 0.2.1.27 didn't handle NOROUTE correctly, but such
29066 clients are already deprecated because of security bugs.
29067 - Don't allow v0 hidden service authorities to act as clients.
29068 Required by fix for bug 3000.
29069 - Ignore SIGNAL NEWNYM commands on relay-only Tor instances. Required
29070 by fix for bug 3000.
29071 - Ensure that no empty [dirreq-](read|write)-history lines are added
29072 to an extrainfo document. Implements ticket 2497.
29074 o Code simplification and refactoring:
29075 - Remove workaround code to handle directory responses from servers
29076 that had bug 539 (they would send HTTP status 503 responses _and_
29077 send a body too). Since only server versions before
29078 0.2.0.16-alpha/0.1.2.19 were affected, there is no longer reason to
29079 keep the workaround in place.
29080 - Remove the old 'fuzzy time' logic. It was supposed to be used for
29081 handling calculations where we have a known amount of clock skew and
29082 an allowed amount of unknown skew. But we only used it in three
29083 places, and we never adjusted the known/unknown skew values. This is
29084 still something we might want to do someday, but if we do, we'll
29085 want to do it differently.
29086 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
29087 None of the cases where we did this before were wrong, but by making
29088 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
29089 - Use GetTempDir to find the proper temporary directory location on
29090 Windows when generating temporary files for the unit tests. Patch by
29094 Changes in version 0.2.2.24-alpha - 2011-04-08
29095 Tor 0.2.2.24-alpha fixes a variety of bugs, including a big bug that
29096 prevented Tor clients from effectively using "multihomed" bridges,
29097 that is, bridges that listen on multiple ports or IP addresses so users
29098 can continue to use some of their addresses even if others get blocked.
29101 - Fix a bug where bridge users who configure the non-canonical
29102 address of a bridge automatically switch to its canonical
29103 address. If a bridge listens at more than one address, it should be
29104 able to advertise those addresses independently and any non-blocked
29105 addresses should continue to work. Bugfix on Tor 0.2.0.x. Fixes
29107 - If you configured Tor to use bridge A, and then quit and
29108 configured Tor to use bridge B instead, it would happily continue
29109 to use bridge A if it's still reachable. While this behavior is
29110 a feature if your goal is connectivity, in some scenarios it's a
29111 dangerous bug. Bugfix on Tor 0.2.0.1-alpha; fixes bug 2511.
29112 - Directory authorities now use data collected from their own
29113 uptime observations when choosing whether to assign the HSDir flag
29114 to relays, instead of trusting the uptime value the relay reports in
29115 its descriptor. This change helps prevent an attack where a small
29116 set of nodes with frequently-changing identity keys can blackhole
29117 a hidden service. (Only authorities need upgrade; others will be
29118 fine once they do.) Bugfix on 0.2.0.10-alpha; fixes bug 2709.
29121 - When we restart our relay, we might get a successful connection
29122 from the outside before we've started our reachability tests,
29123 triggering a warning: "ORPort found reachable, but I have no
29124 routerinfo yet. Failing to inform controller of success." This
29125 bug was harmless unless Tor is running under a controller
29126 like Vidalia, in which case the controller would never get a
29127 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
29129 - Make directory authorities more accurate at recording when
29130 relays that have failed several reachability tests became
29131 unreachable, so we can provide more accuracy at assigning Stable,
29132 Guard, HSDir, etc flags. Bugfix on 0.2.0.6-alpha. Resolves bug 2716.
29133 - Fix an issue that prevented static linking of libevent on
29134 some platforms (notably Linux). Fixes bug 2698; bugfix on
29135 versions 0.2.1.23/0.2.2.8-alpha (the versions introducing
29136 the --with-static-libevent configure option).
29137 - We now ask the other side of a stream (the client or the exit)
29138 for more data on that stream when the amount of queued data on
29139 that stream dips low enough. Previously, we wouldn't ask the
29140 other side for more data until either it sent us more data (which
29141 it wasn't supposed to do if it had exhausted its window!) or we
29142 had completely flushed all our queued data. This flow control fix
29143 should improve throughput. Fixes bug 2756; bugfix on the earliest
29144 released versions of Tor (svn commit r152).
29145 - Avoid a double-mark-for-free warning when failing to attach a
29146 transparent proxy connection. (We thought we had fixed this in
29147 0.2.2.23-alpha, but it turns out our fix was checking the wrong
29148 connection.) Fixes bug 2757; bugfix on 0.1.2.1-alpha (the original
29149 bug) and 0.2.2.23-alpha (the incorrect fix).
29150 - When warning about missing zlib development packages during compile,
29151 give the correct package names. Bugfix on 0.2.0.1-alpha.
29154 - Directory authorities now log the source of a rejected POSTed v3
29155 networkstatus vote.
29156 - Make compilation with clang possible when using
29157 --enable-gcc-warnings by removing two warning options that clang
29158 hasn't implemented yet and by fixing a few warnings. Implements
29160 - When expiring circuits, use microsecond timers rather than
29161 one-second timers. This can avoid an unpleasant situation where a
29162 circuit is launched near the end of one second and expired right
29163 near the beginning of the next, and prevent fluctuations in circuit
29165 - Use computed circuit-build timeouts to decide when to launch
29166 parallel introduction circuits for hidden services. (Previously,
29167 we would retry after 15 seconds.)
29168 - Update to the April 1 2011 Maxmind GeoLite Country database.
29171 - Create the /var/run/tor directory on startup on OpenSUSE if it is
29172 not already created. Patch from Andreas Stieger. Fixes bug 2573.
29174 o Documentation changes:
29175 - Modernize the doxygen configuration file slightly. Fixes bug 2707.
29176 - Resolve all doxygen warnings except those for missing documentation.
29178 - Add doxygen documentation for more functions, fields, and types.
29181 Changes in version 0.2.2.23-alpha - 2011-03-08
29182 Tor 0.2.2.23-alpha lets relays record their bandwidth history so when
29183 they restart they don't lose their bandwidth capacity estimate. This
29184 release also fixes a diverse set of user-facing bugs, ranging from
29185 relays overrunning their rate limiting to clients falsely warning about
29186 clock skew to bridge descriptor leaks by our bridge directory authority.
29189 - Stop sending a CLOCK_SKEW controller status event whenever
29190 we fetch directory information from a relay that has a wrong clock.
29191 Instead, only inform the controller when it's a trusted authority
29192 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
29193 the rest of bug 1074.
29194 - Fix an assert in parsing router descriptors containing IPv6
29195 addresses. This one took down the directory authorities when
29196 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
29197 - Make the bridge directory authority refuse to answer directory
29198 requests for "all" descriptors. It used to include bridge
29199 descriptors in its answer, which was a major information leak.
29200 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
29201 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
29202 Tor would ignore their RelayBandwidthBurst setting,
29203 potentially using more bandwidth than expected. Bugfix on
29204 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
29205 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
29206 hidserv" in her torrc. The 'hidserv' argument never controlled
29207 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
29210 - Relays now save observed peak bandwidth throughput rates to their
29211 state file (along with total usage, which was already saved)
29212 so that they can determine their correct estimated bandwidth on
29213 restart. Resolves bug 1863, where Tor relays would reset their
29214 estimated bandwidth to 0 after restarting.
29215 - Directory authorities now take changes in router IP address and
29216 ORPort into account when determining router stability. Previously,
29217 if a router changed its IP or ORPort, the authorities would not
29218 treat it as having any downtime for the purposes of stability
29219 calculation, whereas clients would experience downtime since the
29220 change could take a while to propagate to them. Resolves issue 1035.
29221 - Enable Address Space Layout Randomization (ASLR) and Data Execution
29222 Prevention (DEP) by default on Windows to make it harder for
29223 attackers to exploit vulnerabilities. Patch from John Brooks.
29225 o Minor bugfixes (on 0.2.1.x and earlier):
29226 - Fix a rare crash bug that could occur when a client was configured
29227 with a large number of bridges. Fixes bug 2629; bugfix on
29228 0.2.1.2-alpha. Bugfix by trac user "shitlei".
29229 - Avoid a double mark-for-free warning when failing to attach a
29230 transparent proxy connection. Bugfix on 0.1.2.1-alpha. Fixes
29232 - Correctly detect failure to allocate an OpenSSL BIO. Fixes bug 2378;
29233 found by "cypherpunks". This bug was introduced before the first
29234 Tor release, in svn commit r110.
29235 - Country codes aren't supported in EntryNodes until 0.2.3.x, so
29236 don't mention them in the manpage. Fixes bug 2450; issue
29237 spotted by keb and G-Lo.
29238 - Fix a bug in bandwidth history state parsing that could have been
29239 triggered if a future version of Tor ever changed the timing
29240 granularity at which bandwidth history is measured. Bugfix on
29241 Tor 0.1.1.11-alpha.
29242 - When a relay decides that its DNS is too broken for it to serve
29243 as an exit server, it advertised itself as a non-exit, but
29244 continued to act as an exit. This could create accidental
29245 partitioning opportunities for users. Instead, if a relay is
29246 going to advertise reject *:* as its exit policy, it should
29247 really act with exit policy "reject *:*". Fixes bug 2366.
29248 Bugfix on Tor 0.1.2.5-alpha. Bugfix by user "postman" on trac.
29249 - In the special case where you configure a public exit relay as your
29250 bridge, Tor would be willing to use that exit relay as the last
29251 hop in your circuit as well. Now we fail that circuit instead.
29252 Bugfix on 0.2.0.12-alpha. Fixes bug 2403. Reported by "piebeer".
29253 - Fix a bug with our locking implementation on Windows that couldn't
29254 correctly detect when a file was already locked. Fixes bug 2504,
29255 bugfix on 0.2.1.6-alpha.
29256 - Fix IPv6-related connect() failures on some platforms (BSD, OS X).
29257 Bugfix on 0.2.0.3-alpha; fixes first part of bug 2660. Patch by
29259 - Set target port in get_interface_address6() correctly. Bugfix
29260 on 0.1.1.4-alpha and 0.2.0.3-alpha; fixes second part of bug 2660.
29261 - Directory authorities are now more robust to hops back in time
29262 when calculating router stability. Previously, if a run of uptime
29263 or downtime appeared to be negative, the calculation could give
29264 incorrect results. Bugfix on 0.2.0.6-alpha; noticed when fixing
29266 - Fix an assert that got triggered when using the TestingTorNetwork
29267 configuration option and then issuing a GETINFO config-text control
29268 command. Fixes bug 2250; bugfix on 0.2.1.2-alpha.
29270 o Minor bugfixes (on 0.2.2.x):
29271 - Clients should not weight BadExit nodes as Exits in their node
29272 selection. Similarly, directory authorities should not count BadExit
29273 bandwidth as Exit bandwidth when computing bandwidth-weights.
29274 Bugfix on 0.2.2.10-alpha; fixes bug 2203.
29275 - Correctly clear our dir_read/dir_write history when there is an
29276 error parsing any bw history value from the state file. Bugfix on
29277 Tor 0.2.2.15-alpha.
29278 - Resolve a bug in verifying signatures of directory objects
29279 with digests longer than SHA1. Bugfix on 0.2.2.20-alpha.
29280 Fixes bug 2409. Found by "piebeer".
29281 - Bridge authorities no longer crash on SIGHUP when they try to
29282 publish their relay descriptor to themselves. Fixes bug 2572. Bugfix
29286 - Log less aggressively about circuit timeout changes, and improve
29287 some other circuit timeout messages. Resolves bug 2004.
29288 - Log a little more clearly about the times at which we're no longer
29289 accepting new connections. Resolves bug 2181.
29290 - Reject attempts at the client side to open connections to private
29291 IP addresses (like 127.0.0.1, 10.0.0.1, and so on) with
29292 a randomly chosen exit node. Attempts to do so are always
29293 ill-defined, generally prevented by exit policies, and usually
29294 in error. This will also help to detect loops in transparent
29295 proxy configurations. You can disable this feature by setting
29296 "ClientRejectInternalAddresses 0" in your torrc.
29297 - Always treat failure to allocate an RSA key as an unrecoverable
29299 - Update to the March 1 2011 Maxmind GeoLite Country database.
29301 o Minor features (log subsystem):
29302 - Add documentation for configuring logging at different severities in
29303 different log domains. We've had this feature since 0.2.1.1-alpha,
29304 but for some reason it never made it into the manpage. Fixes
29306 - Make it simpler to specify "All log domains except for A and B".
29307 Previously you needed to say "[*,~A,~B]". Now you can just say
29309 - Add a "LogMessageDomains 1" option to include the domains of log
29310 messages along with the messages. Without this, there's no way
29311 to use log domains without reading the source or doing a lot
29314 o Packaging changes:
29315 - Stop shipping the Tor specs files and development proposal documents
29316 in the tarball. They are now in a separate git repository at
29317 git://git.torproject.org/torspec.git
29320 Changes in version 0.2.1.30 - 2011-02-23
29321 Tor 0.2.1.30 fixes a variety of less critical bugs. The main other
29322 change is a slight tweak to Tor's TLS handshake that makes relays
29323 and bridges that run this new version reachable from Iran again.
29324 We don't expect this tweak will win the arms race long-term, but it
29325 buys us time until we roll out a better solution.
29328 - Stop sending a CLOCK_SKEW controller status event whenever
29329 we fetch directory information from a relay that has a wrong clock.
29330 Instead, only inform the controller when it's a trusted authority
29331 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
29332 the rest of bug 1074.
29333 - Fix a bounds-checking error that could allow an attacker to
29334 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
29335 Found by "piebeer".
29336 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
29337 Tor would ignore their RelayBandwidthBurst setting,
29338 potentially using more bandwidth than expected. Bugfix on
29339 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
29340 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
29341 hidserv" in her torrc. The 'hidserv' argument never controlled
29342 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
29345 - Adjust our TLS Diffie-Hellman parameters to match those used by
29347 - Update to the February 1 2011 Maxmind GeoLite Country database.
29350 - Check for and reject overly long directory certificates and
29351 directory tokens before they have a chance to hit any assertions.
29352 Bugfix on 0.2.1.28. Found by "doorss".
29353 - Bring the logic that gathers routerinfos and assesses the
29354 acceptability of circuits into line. This prevents a Tor OP from
29355 getting locked in a cycle of choosing its local OR as an exit for a
29356 path (due to a .exit request) and then rejecting the circuit because
29357 its OR is not listed yet. It also prevents Tor clients from using an
29358 OR running in the same instance as an exit (due to a .exit request)
29359 if the OR does not meet the same requirements expected of an OR
29360 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
29362 o Packaging changes:
29363 - Stop shipping the Tor specs files and development proposal documents
29364 in the tarball. They are now in a separate git repository at
29365 git://git.torproject.org/torspec.git
29366 - Do not include Git version tags as though they are SVN tags when
29367 generating a tarball from inside a repository that has switched
29368 between branches. Bugfix on 0.2.1.15-rc; fixes bug 2402.
29371 Changes in version 0.2.2.22-alpha - 2011-01-25
29372 Tor 0.2.2.22-alpha fixes a few more less-critical security issues. The
29373 main other change is a slight tweak to Tor's TLS handshake that makes
29374 relays and bridges that run this new version reachable from Iran again.
29375 We don't expect this tweak will win the arms race long-term, but it
29376 will buy us a bit more time until we roll out a better solution.
29379 - Fix a bounds-checking error that could allow an attacker to
29380 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
29381 Found by "piebeer".
29382 - Don't assert when changing from bridge to relay or vice versa
29383 via the controller. The assert happened because we didn't properly
29384 initialize our keys in this case. Bugfix on 0.2.2.18-alpha; fixes
29385 bug 2433. Reported by bastik.
29388 - Adjust our TLS Diffie-Hellman parameters to match those used by
29390 - Provide a log message stating which geoip file we're parsing
29391 instead of just stating that we're parsing the geoip file.
29392 Implements ticket 2432.
29395 - Check for and reject overly long directory certificates and
29396 directory tokens before they have a chance to hit any assertions.
29397 Bugfix on 0.2.1.28 / 0.2.2.20-alpha. Found by "doorss".
29400 Changes in version 0.2.2.21-alpha - 2011-01-15
29401 Tor 0.2.2.21-alpha includes all the patches from Tor 0.2.1.29, which
29402 continues our recent code security audit work. The main fix resolves
29403 a remote heap overflow vulnerability that can allow remote code
29404 execution (CVE-2011-0427). Other fixes address a variety of assert
29405 and crash bugs, most of which we think are hard to exploit remotely.
29407 o Major bugfixes (security), also included in 0.2.1.29:
29408 - Fix a heap overflow bug where an adversary could cause heap
29409 corruption. This bug probably allows remote code execution
29410 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
29412 - Prevent a denial-of-service attack by disallowing any
29413 zlib-compressed data whose compression factor is implausibly
29414 high. Fixes part of bug 2324; reported by "doorss".
29415 - Zero out a few more keys in memory before freeing them. Fixes
29416 bug 2384 and part of bug 2385. These key instances found by
29417 "cypherpunks", based on Andrew Case's report about being able
29418 to find sensitive data in Tor's memory space if you have enough
29419 permissions. Bugfix on 0.0.2pre9.
29421 o Major bugfixes (crashes), also included in 0.2.1.29:
29422 - Prevent calls to Libevent from inside Libevent log handlers.
29423 This had potential to cause a nasty set of crashes, especially
29424 if running Libevent with debug logging enabled, and running
29425 Tor with a controller watching for low-severity log messages.
29426 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
29427 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
29428 underflow errors there too. Fixes the other part of bug 2324.
29429 - Fix a bug where we would assert if we ever had a
29430 cached-descriptors.new file (or another file read directly into
29431 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
29432 on 0.2.1.25. Found by doorss.
29433 - Fix some potential asserts and parsing issues with grossly
29434 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
29437 o Minor bugfixes (other), also included in 0.2.1.29:
29438 - Fix a bug with handling misformed replies to reverse DNS lookup
29439 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
29440 bug reported by doorss.
29441 - Fix compilation on mingw when a pthreads compatibility library
29442 has been installed. (We don't want to use it, so we shouldn't
29443 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
29444 - Fix a bug where we would declare that we had run out of virtual
29445 addresses when the address space was only half-exhausted. Bugfix
29447 - Correctly handle the case where AutomapHostsOnResolve is set but
29448 no virtual addresses are available. Fixes bug 2328; bugfix on
29449 0.1.2.1-alpha. Bug found by doorss.
29450 - Correctly handle wrapping around when we run out of virtual
29451 address space. Found by cypherpunks; bugfix on 0.2.0.5-alpha.
29453 o Minor features, also included in 0.2.1.29:
29454 - Update to the January 1 2011 Maxmind GeoLite Country database.
29455 - Introduce output size checks on all of our decryption functions.
29457 o Build changes, also included in 0.2.1.29:
29458 - Tor does not build packages correctly with Automake 1.6 and earlier;
29459 added a check to Makefile.am to make sure that we're building with
29460 Automake 1.7 or later.
29461 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
29462 because we built it with a too-old version of automake. Thus that
29463 release broke ./configure --enable-openbsd-malloc, which is popular
29464 among really fast exit relays on Linux.
29466 o Major bugfixes, new in 0.2.2.21-alpha:
29467 - Prevent crash/heap corruption when the cbtnummodes consensus
29468 parameter is set to 0 or large values. Fixes bug 2317; bugfix
29471 o Major features, new in 0.2.2.21-alpha:
29472 - Introduce minimum/maximum values that clients will believe
29473 from the consensus. Now we'll have a better chance to avoid crashes
29474 or worse when a consensus param has a weird value.
29476 o Minor features, new in 0.2.2.21-alpha:
29477 - Make sure to disable DirPort if running as a bridge. DirPorts aren't
29478 used on bridges, and it makes bridge scanning somewhat easier.
29479 - If writing the state file to disk fails, wait up to an hour before
29480 retrying again, rather than trying again each second. Fixes bug
29481 2346; bugfix on Tor 0.1.1.3-alpha.
29482 - Make Libevent log messages get delivered to controllers later,
29483 and not from inside the Libevent log handler. This prevents unsafe
29484 reentrant Libevent calls while still letting the log messages
29486 - Detect platforms that brokenly use a signed size_t, and refuse to
29487 build there. Found and analyzed by doorss and rransom.
29488 - Fix a bunch of compile warnings revealed by mingw with gcc 4.5.
29491 o Minor bugfixes, new in 0.2.2.21-alpha:
29492 - Handle SOCKS messages longer than 128 bytes long correctly, rather
29493 than waiting forever for them to finish. Fixes bug 2330; bugfix
29494 on 0.2.0.16-alpha. Found by doorss.
29495 - Add assertions to check for overflow in arguments to
29496 base32_encode() and base32_decode(); fix a signed-unsigned
29497 comparison there too. These bugs are not actually reachable in Tor,
29498 but it's good to prevent future errors too. Found by doorss.
29499 - Correctly detect failures to create DNS requests when using Libevent
29500 versions before v2. (Before Libevent 2, we used our own evdns
29501 implementation. Its return values for Libevent's evdns_resolve_*()
29502 functions are not consistent with those from Libevent.) Fixes bug
29503 2363; bugfix on 0.2.2.6-alpha. Found by "lodger".
29505 o Documentation, new in 0.2.2.21-alpha:
29506 - Document the default socks host and port (127.0.0.1:9050) for
29510 Changes in version 0.2.1.29 - 2011-01-15
29511 Tor 0.2.1.29 continues our recent code security audit work. The main
29512 fix resolves a remote heap overflow vulnerability that can allow remote
29513 code execution. Other fixes address a variety of assert and crash bugs,
29514 most of which we think are hard to exploit remotely.
29516 o Major bugfixes (security):
29517 - Fix a heap overflow bug where an adversary could cause heap
29518 corruption. This bug probably allows remote code execution
29519 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
29521 - Prevent a denial-of-service attack by disallowing any
29522 zlib-compressed data whose compression factor is implausibly
29523 high. Fixes part of bug 2324; reported by "doorss".
29524 - Zero out a few more keys in memory before freeing them. Fixes
29525 bug 2384 and part of bug 2385. These key instances found by
29526 "cypherpunks", based on Andrew Case's report about being able
29527 to find sensitive data in Tor's memory space if you have enough
29528 permissions. Bugfix on 0.0.2pre9.
29530 o Major bugfixes (crashes):
29531 - Prevent calls to Libevent from inside Libevent log handlers.
29532 This had potential to cause a nasty set of crashes, especially
29533 if running Libevent with debug logging enabled, and running
29534 Tor with a controller watching for low-severity log messages.
29535 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
29536 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
29537 underflow errors there too. Fixes the other part of bug 2324.
29538 - Fix a bug where we would assert if we ever had a
29539 cached-descriptors.new file (or another file read directly into
29540 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
29541 on 0.2.1.25. Found by doorss.
29542 - Fix some potential asserts and parsing issues with grossly
29543 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
29546 o Minor bugfixes (other):
29547 - Fix a bug with handling misformed replies to reverse DNS lookup
29548 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
29549 bug reported by doorss.
29550 - Fix compilation on mingw when a pthreads compatibility library
29551 has been installed. (We don't want to use it, so we shouldn't
29552 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
29553 - Fix a bug where we would declare that we had run out of virtual
29554 addresses when the address space was only half-exhausted. Bugfix
29556 - Correctly handle the case where AutomapHostsOnResolve is set but
29557 no virtual addresses are available. Fixes bug 2328; bugfix on
29558 0.1.2.1-alpha. Bug found by doorss.
29559 - Correctly handle wrapping around to when we run out of virtual
29560 address space. Found by cypherpunks, bugfix on 0.2.0.5-alpha.
29561 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
29562 because we built it with a too-old version of automake. Thus that
29563 release broke ./configure --enable-openbsd-malloc, which is popular
29564 among really fast exit relays on Linux.
29567 - Update to the January 1 2011 Maxmind GeoLite Country database.
29568 - Introduce output size checks on all of our decryption functions.
29571 - Tor does not build packages correctly with Automake 1.6 and earlier;
29572 added a check to Makefile.am to make sure that we're building with
29573 Automake 1.7 or later.
29576 Changes in version 0.2.2.20-alpha - 2010-12-17
29577 Tor 0.2.2.20-alpha does some code cleanup to reduce the risk of remotely
29578 exploitable bugs. We also fix a variety of other significant bugs,
29579 change the IP address for one of our directory authorities, and update
29580 the minimum version that Tor relays must run to join the network.
29583 - Fix a remotely exploitable bug that could be used to crash instances
29584 of Tor remotely by overflowing on the heap. Remote-code execution
29585 hasn't been confirmed, but can't be ruled out. Everyone should
29586 upgrade. Bugfix on the 0.1.1 series and later.
29587 - Fix a bug that could break accounting on 64-bit systems with large
29588 time_t values, making them hibernate for impossibly long intervals.
29589 Fixes bug 2146. Bugfix on 0.0.9pre6; fix by boboper.
29590 - Fix a logic error in directory_fetches_from_authorities() that
29591 would cause all _non_-exits refusing single-hop-like circuits
29592 to fetch from authorities, when we wanted to have _exits_ fetch
29593 from authorities. Fixes more of 2097. Bugfix on 0.2.2.16-alpha;
29595 - Fix a stream fairness bug that would cause newer streams on a given
29596 circuit to get preference when reading bytes from the origin or
29597 destination. Fixes bug 2210. Fix by Mashael AlSabah. This bug was
29598 introduced before the first Tor release, in svn revision r152.
29600 o Directory authority changes:
29601 - Change IP address and ports for gabelmoo (v3 directory authority).
29604 - Avoid crashes when AccountingMax is set on clients. Fixes bug 2235.
29605 Bugfix on 0.2.2.18-alpha. Diagnosed by boboper.
29606 - Fix an off-by-one error in calculating some controller command
29607 argument lengths. Fortunately, this mistake is harmless since
29608 the controller code does redundant NUL termination too. Found by
29609 boboper. Bugfix on 0.1.1.1-alpha.
29610 - Do not dereference NULL if a bridge fails to build its
29611 extra-info descriptor. Found by an anonymous commenter on
29612 Trac. Bugfix on 0.2.2.19-alpha.
29615 - Update to the December 1 2010 Maxmind GeoLite Country database.
29616 - Directory authorities now reject relays running any versions of
29617 Tor between 0.2.1.3-alpha and 0.2.1.18 inclusive; they have
29618 known bugs that keep RELAY_EARLY cells from working on rendezvous
29619 circuits. Followup to fix for bug 2081.
29620 - Directory authorities now reject relays running any version of Tor
29621 older than 0.2.0.26-rc. That version is the earliest that fetches
29622 current directory information correctly. Fixes bug 2156.
29623 - Report only the top 10 ports in exit-port stats in order not to
29624 exceed the maximum extra-info descriptor length of 50 KB. Implements
29628 Changes in version 0.2.1.28 - 2010-12-17
29629 Tor 0.2.1.28 does some code cleanup to reduce the risk of remotely
29630 exploitable bugs. We also took this opportunity to change the IP address
29631 for one of our directory authorities, and to update the geoip database
29635 - Fix a remotely exploitable bug that could be used to crash instances
29636 of Tor remotely by overflowing on the heap. Remote-code execution
29637 hasn't been confirmed, but can't be ruled out. Everyone should
29638 upgrade. Bugfix on the 0.1.1 series and later.
29640 o Directory authority changes:
29641 - Change IP address and ports for gabelmoo (v3 directory authority).
29644 - Update to the December 1 2010 Maxmind GeoLite Country database.
29647 Changes in version 0.2.1.27 - 2010-11-23
29648 Yet another OpenSSL security patch broke its compatibility with Tor:
29649 Tor 0.2.1.27 makes relays work with openssl 0.9.8p and 1.0.0.b. We
29650 also took this opportunity to fix several crash bugs, integrate a new
29651 directory authority, and update the bundled GeoIP database.
29654 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
29655 No longer set the tlsext_host_name extension on server SSL objects;
29656 but continue to set it on client SSL objects. Our goal in setting
29657 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
29658 bugfix on 0.2.1.1-alpha.
29659 - Do not log messages to the controller while shrinking buffer
29660 freelists. Doing so would sometimes make the controller connection
29661 try to allocate a buffer chunk, which would mess up the internals
29662 of the freelist and cause an assertion failure. Fixes bug 1125;
29663 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
29664 - Learn our external IP address when we're a relay or bridge, even if
29665 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
29666 where we introduced bridge relays that don't need to publish to
29667 be useful. Fixes bug 2050.
29668 - Do even more to reject (and not just ignore) annotations on
29669 router descriptors received anywhere but from the cache. Previously
29670 we would ignore such annotations at first, but cache them to disk
29671 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
29672 - When you're using bridges and your network goes away and your
29673 bridges get marked as down, recover when you attempt a new socks
29674 connection (if the network is back), rather than waiting up to an
29675 hour to try fetching new descriptors for your bridges. Bugfix on
29676 0.2.0.3-alpha; fixes bug 1981.
29679 - Move to the November 2010 Maxmind GeoLite country db (rather
29680 than the June 2009 ip-to-country GeoIP db) for our statistics that
29681 count how many users relays are seeing from each country. Now we'll
29682 have more accurate data, especially for many African countries.
29684 o New directory authorities:
29685 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
29689 - Fix an assertion failure that could occur in directory caches or
29690 bridge users when using a very short voting interval on a testing
29691 network. Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on
29693 - Enforce multiplicity rules when parsing annotations. Bugfix on
29694 0.2.0.8-alpha. Found by piebeer.
29695 - Allow handshaking OR connections to take a full KeepalivePeriod
29696 seconds to handshake. Previously, we would close them after
29697 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
29698 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
29700 - When building with --enable-gcc-warnings on OpenBSD, disable
29701 warnings in system headers. This makes --enable-gcc-warnings
29702 pass on OpenBSD 4.8.
29705 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
29706 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
29707 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
29708 Servers can start sending this code when enough clients recognize
29709 it. Bugfix on 0.1.0.1-rc; fixes part of bug 1793.
29710 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
29711 Patch from mingw-san.
29714 - Remove the old debian/ directory from the main Tor distribution.
29715 The official Tor-for-debian git repository lives at the URL
29716 https://git.torproject.org/debian/tor.git
29717 - Stop shipping the old doc/website/ directory in the tarball. We
29718 changed the website format in late 2010, and what we shipped in
29719 0.2.1.26 really wasn't that useful anyway.
29722 Changes in version 0.2.2.19-alpha - 2010-11-22
29723 Yet another OpenSSL security patch broke its compatibility with Tor:
29724 Tor 0.2.2.19-alpha makes relays work with OpenSSL 0.9.8p and 1.0.0.b.
29727 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
29728 No longer set the tlsext_host_name extension on server SSL objects;
29729 but continue to set it on client SSL objects. Our goal in setting
29730 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
29731 bugfix on 0.2.1.1-alpha.
29734 - Try harder not to exceed the maximum length of 50 KB when writing
29735 statistics to extra-info descriptors. This bug was triggered by very
29736 fast relays reporting exit-port, entry, and dirreq statistics.
29737 Reported by Olaf Selke. Bugfix on 0.2.2.1-alpha. Fixes bug 2183.
29738 - Publish a router descriptor even if generating an extra-info
29739 descriptor fails. Previously we would not publish a router
29740 descriptor without an extra-info descriptor; this can cause fast
29741 exit relays collecting exit-port statistics to drop from the
29742 consensus. Bugfix on 0.1.2.9-rc; fixes bug 2195.
29745 Changes in version 0.2.2.18-alpha - 2010-11-16
29746 Tor 0.2.2.18-alpha fixes several crash bugs that have been nagging
29747 us lately, makes unpublished bridge relays able to detect their IP
29748 address, and fixes a wide variety of other bugs to get us much closer
29749 to a stable release.
29752 - Do even more to reject (and not just ignore) annotations on
29753 router descriptors received anywhere but from the cache. Previously
29754 we would ignore such annotations at first, but cache them to disk
29755 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
29756 - Do not log messages to the controller while shrinking buffer
29757 freelists. Doing so would sometimes make the controller connection
29758 try to allocate a buffer chunk, which would mess up the internals
29759 of the freelist and cause an assertion failure. Fixes bug 1125;
29760 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
29761 - Learn our external IP address when we're a relay or bridge, even if
29762 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
29763 where we introduced bridge relays that don't need to publish to
29764 be useful. Fixes bug 2050.
29765 - Maintain separate TLS contexts and certificates for incoming and
29766 outgoing connections in bridge relays. Previously we would use the
29767 same TLS contexts and certs for incoming and outgoing connections.
29768 Bugfix on 0.2.0.3-alpha; addresses bug 988.
29769 - Maintain separate identity keys for incoming and outgoing TLS
29770 contexts in bridge relays. Previously we would use the same
29771 identity keys for incoming and outgoing TLS contexts. Bugfix on
29772 0.2.0.3-alpha; addresses the other half of bug 988.
29773 - Avoid an assertion failure when we as an authority receive a
29774 duplicate upload of a router descriptor that we already have,
29775 but which we previously considered an obsolete descriptor.
29776 Fixes another case of bug 1776. Bugfix on 0.2.2.16-alpha.
29777 - Avoid a crash bug triggered by looking at a dangling pointer while
29778 setting the network status consensus. Found by Robert Ransom.
29779 Bugfix on 0.2.2.17-alpha. Fixes bug 2097.
29780 - Fix a logic error where servers that _didn't_ act as exits would
29781 try to keep their server lists more aggressively up to date than
29782 exits, when it was supposed to be the other way around. Bugfix
29785 o Minor bugfixes (on Tor 0.2.1.x and earlier):
29786 - When we're trying to guess whether we know our IP address as
29787 a relay, we would log various ways that we failed to guess
29788 our address, but never log that we ended up guessing it
29789 successfully. Now add a log line to help confused and anxious
29790 relay operators. Bugfix on 0.1.2.1-alpha; fixes bug 1534.
29791 - Bring the logic that gathers routerinfos and assesses the
29792 acceptability of circuits into line. This prevents a Tor OP from
29793 getting locked in a cycle of choosing its local OR as an exit for a
29794 path (due to a .exit request) and then rejecting the circuit because
29795 its OR is not listed yet. It also prevents Tor clients from using an
29796 OR running in the same instance as an exit (due to a .exit request)
29797 if the OR does not meet the same requirements expected of an OR
29798 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
29799 - Correctly describe errors that occur when generating a TLS object.
29800 Previously we would attribute them to a failure while generating a
29801 TLS context. Patch by Robert Ransom. Bugfix on 0.1.0.4-rc; fixes
29803 - Enforce multiplicity rules when parsing annotations. Bugfix on
29804 0.2.0.8-alpha. Found by piebeer.
29805 - Fix warnings that newer versions of autoconf produced during
29806 ./autogen.sh. These warnings appear to be harmless in our case,
29807 but they were extremely verbose. Fixes bug 2020.
29809 o Minor bugfixes (on Tor 0.2.2.x):
29810 - Enable protection of small arrays whenever we build with gcc
29811 hardening features, not only when also building with warnings
29812 enabled. Fixes bug 2031; bugfix on 0.2.2.14-alpha. Reported by keb.
29815 - Make hidden services work better in private Tor networks by not
29816 requiring any uptime to join the hidden service descriptor
29817 DHT. Implements ticket 2088.
29818 - Rate-limit the "your application is giving Tor only an IP address"
29819 warning. Addresses bug 2000; bugfix on 0.0.8pre2.
29820 - When AllowSingleHopExits is set, print a warning to explain to the
29821 relay operator why most clients are avoiding her relay.
29822 - Update to the November 1 2010 Maxmind GeoLite Country database.
29824 o Code simplifications and refactoring:
29825 - When we fixed bug 1038 we had to put in a restriction not to send
29826 RELAY_EARLY cells on rend circuits. This was necessary as long
29827 as relays using Tor 0.2.1.3-alpha through 0.2.1.18-alpha were
29828 active. Now remove this obsolete check. Resolves bug 2081.
29829 - Some options used different conventions for uppercasing of acronyms
29830 when comparing manpage and source. Fix those in favor of the
29831 manpage, as it makes sense to capitalize acronyms.
29832 - Remove the torrc.complete file. It hasn't been kept up to date
29833 and users will have better luck checking out the manpage.
29834 - Remove the obsolete "NoPublish" option; it has been flagged
29835 as obsolete and has produced a warning since 0.1.1.18-rc.
29836 - Remove everything related to building the expert bundle for OS X.
29837 It has confused many users, doesn't work right on OS X 10.6,
29838 and is hard to get rid of once installed. Resolves bug 1274.
29841 Changes in version 0.2.2.17-alpha - 2010-09-30
29842 Tor 0.2.2.17-alpha introduces a feature to make it harder for clients
29843 to use one-hop circuits (which can put the exit relays at higher risk,
29844 plus unbalance the network); fixes a big bug in bandwidth accounting
29845 for relays that want to limit their monthly bandwidth use; fixes a
29846 big pile of bugs in how clients tolerate temporary network failure;
29847 and makes our adaptive circuit build timeout feature (which improves
29848 client performance if your network is fast while not breaking things
29849 if your network is slow) better handle bad networks.
29852 - Exit relays now try harder to block exit attempts from unknown
29853 relays, to make it harder for people to use them as one-hop proxies
29854 a la tortunnel. Controlled by the refuseunknownexits consensus
29855 parameter (currently enabled), or you can override it on your
29856 relay with the RefuseUnknownExits torrc option. Resolves bug 1751.
29858 o Major bugfixes (0.2.1.x and earlier):
29859 - Fix a bug in bandwidth accounting that could make us use twice
29860 the intended bandwidth when our interval start changes due to
29861 daylight saving time. Now we tolerate skew in stored vs computed
29862 interval starts: if the start of the period changes by no more than
29863 50% of the period's duration, we remember bytes that we transferred
29864 in the old period. Fixes bug 1511; bugfix on 0.0.9pre5.
29865 - Always search the Windows system directory for system DLLs, and
29866 nowhere else. Bugfix on 0.1.1.23; fixes bug 1954.
29867 - When you're using bridges and your network goes away and your
29868 bridges get marked as down, recover when you attempt a new socks
29869 connection (if the network is back), rather than waiting up to an
29870 hour to try fetching new descriptors for your bridges. Bugfix on
29871 0.2.0.3-alpha; fixes bug 1981.
29873 o Major bugfixes (on 0.2.2.x):
29874 - Fix compilation on Windows. Bugfix on 0.2.2.16-alpha; related to
29876 - Fix a segfault that could happen when operating a bridge relay with
29877 no GeoIP database set. Fixes bug 1964; bugfix on 0.2.2.15-alpha.
29878 - The consensus bandwidth-weights (used by clients to choose fast
29879 relays) entered an unexpected edge case in September where
29880 Exits were much scarcer than Guards, resulting in bad weight
29881 recommendations. Now we compute them using new constraints that
29882 should succeed in all cases. Also alter directory authorities to
29883 not include the bandwidth-weights line if they fail to produce
29884 valid values. Fixes bug 1952; bugfix on 0.2.2.10-alpha.
29885 - When weighting bridges during path selection, we used to trust
29886 the bandwidths they provided in their descriptor, only capping them
29887 at 10MB/s. This turned out to be problematic for two reasons:
29888 Bridges could claim to handle a lot more traffic then they
29889 actually would, thus making more clients pick them and have a
29890 pretty effective DoS attack. The other issue is that new bridges
29891 that might not have a good estimate for their bw capacity yet
29892 would not get used at all unless no other bridges are available
29893 to a client. Fixes bug 1912; bugfix on 0.2.2.7-alpha.
29895 o Major bugfixes (on the circuit build timeout feature, 0.2.2.x):
29896 - Ignore cannibalized circuits when recording circuit build times.
29897 This should provide for a minor performance improvement for hidden
29898 service users using 0.2.2.14-alpha, and should remove two spurious
29899 notice log messages. Bugfix on 0.2.2.14-alpha; fixes bug 1740.
29900 - Simplify the logic that causes us to decide if the network is
29901 unavailable for purposes of recording circuit build times. If we
29902 receive no cells whatsoever for the entire duration of a circuit's
29903 full measured lifetime, the network is probably down. Also ignore
29904 one-hop directory fetching circuit timeouts when calculating our
29905 circuit build times. These changes should hopefully reduce the
29906 cases where we see ridiculous circuit build timeouts for people
29907 with spotty wireless connections. Fixes part of bug 1772; bugfix
29909 - Prevent the circuit build timeout from becoming larger than
29910 the maximum build time we have ever seen. Also, prevent the time
29911 period for measurement circuits from becoming larger than twice that
29912 value. Fixes the other part of bug 1772; bugfix on 0.2.2.2-alpha.
29915 - When we run out of directory information such that we can't build
29916 circuits, but then get enough that we can build circuits, log when
29917 we actually construct a circuit, so the user has a better chance of
29918 knowing what's going on. Fixes bug 1362.
29919 - Be more generous with how much bandwidth we'd use up (with
29920 accounting enabled) before entering "soft hibernation". Previously,
29921 we'd refuse new connections and circuits once we'd used up 95% of
29922 our allotment. Now, we use up 95% of our allotment, AND make sure
29923 that we have no more than 500MB (or 3 hours of expected traffic,
29924 whichever is lower) remaining before we enter soft hibernation.
29925 - If we've configured EntryNodes and our network goes away and/or all
29926 our entrynodes get marked down, optimistically retry them all when
29927 a new socks application request appears. Fixes bug 1882.
29928 - Add some more defensive programming for architectures that can't
29929 handle unaligned integer accesses. We don't know of any actual bugs
29930 right now, but that's the best time to fix them. Fixes bug 1943.
29931 - Support line continuations in the torrc config file. If a line
29932 ends with a single backslash character, the newline is ignored, and
29933 the configuration value is treated as continuing on the next line.
29936 o Minor bugfixes (on 0.2.1.x and earlier):
29937 - For bandwidth accounting, calculate our expected bandwidth rate
29938 based on the time during which we were active and not in
29939 soft-hibernation during the last interval. Previously, we were
29940 also considering the time spent in soft-hibernation. If this
29941 was a long time, we would wind up underestimating our bandwidth
29942 by a lot, and skewing our wakeup time towards the start of the
29943 accounting interval. Fixes bug 1789. Bugfix on 0.0.9pre5.
29945 o Minor bugfixes (on 0.2.2.x):
29946 - Resume generating CIRC FAILED REASON=TIMEOUT control port messages,
29947 which were disabled by the circuit build timeout changes in
29948 0.2.2.14-alpha. Bugfix on 0.2.2.14-alpha; fixes bug 1739.
29949 - Make sure we don't warn about missing bandwidth weights when
29950 choosing bridges or other relays not in the consensus. Bugfix on
29951 0.2.2.10-alpha; fixes bug 1805.
29952 - In our logs, do not double-report signatures from unrecognized
29953 authorities both as "from unknown authority" and "not
29954 present". Fixes bug 1956, bugfix on 0.2.2.16-alpha.
29957 Changes in version 0.2.2.16-alpha - 2010-09-17
29958 Tor 0.2.2.16-alpha fixes a variety of old stream fairness bugs (most
29959 evident at exit relays), and also continues to resolve all the little
29960 bugs that have been filling up trac lately.
29962 o Major bugfixes (stream-level fairness):
29963 - When receiving a circuit-level SENDME for a blocked circuit, try
29964 to package cells fairly from all the streams that had previously
29965 been blocked on that circuit. Previously, we had started with the
29966 oldest stream, and allowed each stream to potentially exhaust
29967 the circuit's package window. This gave older streams on any
29968 given circuit priority over newer ones. Fixes bug 1937. Detected
29969 originally by Camilo Viecco. This bug was introduced before the
29970 first Tor release, in svn commit r152: it is the new winner of
29971 the longest-lived bug prize.
29972 - When the exit relay got a circuit-level sendme cell, it started
29973 reading on the exit streams, even if had 500 cells queued in the
29974 circuit queue already, so the circuit queue just grew and grew in
29975 some cases. We fix this by not re-enabling reading on receipt of a
29976 sendme cell when the cell queue is blocked. Fixes bug 1653. Bugfix
29977 on 0.2.0.1-alpha. Detected by Mashael AlSabah. Original patch by
29979 - Newly created streams were allowed to read cells onto circuits,
29980 even if the circuit's cell queue was blocked and waiting to drain.
29981 This created potential unfairness, as older streams would be
29982 blocked, but newer streams would gladly fill the queue completely.
29983 We add code to detect this situation and prevent any stream from
29984 getting more than one free cell. Bugfix on 0.2.0.1-alpha. Partially
29988 - Update to the September 1 2010 Maxmind GeoLite Country database.
29989 - Warn when CookieAuthFileGroupReadable is set but CookieAuthFile is
29990 not. This would lead to a cookie that is still not group readable.
29991 Closes bug 1843. Suggested by katmagic.
29992 - When logging a rate-limited warning, we now mention how many messages
29993 got suppressed since the last warning.
29994 - Add new "perconnbwrate" and "perconnbwburst" consensus params to
29995 do individual connection-level rate limiting of clients. The torrc
29996 config options with the same names trump the consensus params, if
29997 both are present. Replaces the old "bwconnrate" and "bwconnburst"
29998 consensus params which were broken from 0.2.2.7-alpha through
29999 0.2.2.14-alpha. Closes bug 1947.
30000 - When a router changes IP address or port, authorities now launch
30001 a new reachability test for it. Implements ticket 1899.
30002 - Make the formerly ugly "2 unknown, 7 missing key, 0 good, 0 bad,
30003 2 no signature, 4 required" messages about consensus signatures
30004 easier to read, and make sure they get logged at the same severity
30005 as the messages explaining which keys are which. Fixes bug 1290.
30006 - Don't warn when we have a consensus that we can't verify because
30007 of missing certificates, unless those certificates are ones
30008 that we have been trying and failing to download. Fixes bug 1145.
30009 - If you configure your bridge with a known identity fingerprint,
30010 and the bridge authority is unreachable (as it is in at least
30011 one country now), fall back to directly requesting the descriptor
30012 from the bridge. Finishes the feature started in 0.2.0.10-alpha;
30014 - When building with --enable-gcc-warnings on OpenBSD, disable
30015 warnings in system headers. This makes --enable-gcc-warnings
30016 pass on OpenBSD 4.8.
30018 o Minor bugfixes (on 0.2.1.x and earlier):
30019 - Authorities will now attempt to download consensuses if their
30020 own efforts to make a live consensus have failed. This change
30021 means authorities that restart will fetch a valid consensus, and
30022 it means authorities that didn't agree with the current consensus
30023 will still fetch and serve it if it has enough signatures. Bugfix
30024 on 0.2.0.9-alpha; fixes bug 1300.
30025 - Ensure DNS requests launched by "RESOLVE" commands from the
30026 controller respect the __LeaveStreamsUnattached setconf options. The
30027 same goes for requests launched via DNSPort or transparent
30028 proxying. Bugfix on 0.2.0.1-alpha; fixes bug 1525.
30029 - Allow handshaking OR connections to take a full KeepalivePeriod
30030 seconds to handshake. Previously, we would close them after
30031 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
30032 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
30034 - Rate-limit "Failed to hand off onionskin" warnings.
30035 - Never relay a cell for a circuit we have already destroyed.
30036 Between marking a circuit as closeable and finally closing it,
30037 it may have been possible for a few queued cells to get relayed,
30038 even though they would have been immediately dropped by the next
30039 OR in the circuit. Fixes bug 1184; bugfix on 0.2.0.1-alpha.
30040 - Never queue a cell for a circuit that's already been marked
30042 - Never vote for a server as "Running" if we have a descriptor for
30043 it claiming to be hibernating, and that descriptor was published
30044 more recently than our last contact with the server. Bugfix on
30045 0.2.0.3-alpha; fixes bug 911.
30046 - Squash a compile warning on OpenBSD. Reported by Tas; fixes
30049 o Minor bugfixes (on 0.2.2.x):
30050 - Fix a regression introduced in 0.2.2.7-alpha that marked relays
30051 down if a directory fetch fails and you've configured either
30052 bridges or EntryNodes. The intent was to mark the relay as down
30053 _unless_ you're using bridges or EntryNodes, since if you are
30054 then you could quickly run out of entry points.
30055 - Fix the Windows directory-listing code. A bug introduced in
30056 0.2.2.14-alpha could make Windows directory servers forget to load
30057 some of their cached v2 networkstatus files.
30058 - Really allow clients to use relays as bridges. Fixes bug 1776;
30059 bugfix on 0.2.2.15-alpha.
30060 - Demote a warn to info that happens when the CellStatistics option
30061 was just enabled. Bugfix on 0.2.2.15-alpha; fixes bug 1921.
30062 Reported by Moritz Bartl.
30063 - On Windows, build correctly either with or without Unicode support.
30064 This is necessary so that Tor can support fringe platforms like
30065 Windows 98 (which has no Unicode), or Windows CE (which has no
30066 non-Unicode). Bugfix on 0.2.2.14-alpha; fixes bug 1797.
30069 - Add a unit test for cross-platform directory-listing code.
30072 Changes in version 0.2.2.15-alpha - 2010-08-18
30073 Tor 0.2.2.15-alpha fixes a big bug in hidden service availability,
30074 fixes a variety of other bugs that were preventing performance
30075 experiments from moving forward, fixes several bothersome memory leaks,
30076 and generally closes a lot of smaller bugs that have been filling up
30080 - Stop assigning the HSDir flag to relays that disable their
30081 DirPort (and thus will refuse to answer directory requests). This
30082 fix should dramatically improve the reachability of hidden services:
30083 hidden services and hidden service clients pick six HSDir relays
30084 to store and retrieve the hidden service descriptor, and currently
30085 about half of the HSDir relays will refuse to work. Bugfix on
30086 0.2.0.10-alpha; fixes part of bug 1693.
30087 - The PerConnBWRate and Burst config options, along with the
30088 bwconnrate and bwconnburst consensus params, initialized each conn's
30089 token bucket values only when the connection is established. Now we
30090 update them if the config options change, and update them every time
30091 we get a new consensus. Otherwise we can encounter an ugly edge
30092 case where we initialize an OR conn to client-level bandwidth,
30093 but then later the relay joins the consensus and we leave it
30094 throttled. Bugfix on 0.2.2.7-alpha; fixes bug 1830.
30095 - Fix a regression that caused Tor to rebind its ports if it receives
30096 SIGHUP while hibernating. Bugfix in 0.1.1.6-alpha; closes bug 919.
30099 - Lower the maximum weighted-fractional-uptime cutoff to 98%. This
30100 should give us approximately 40-50% more Guard-flagged nodes,
30101 improving the anonymity the Tor network can provide and also
30102 decreasing the dropoff in throughput that relays experience when
30103 they first get the Guard flag.
30104 - Allow enabling or disabling the *Statistics config options while
30108 - Update to the August 1 2010 Maxmind GeoLite Country database.
30109 - Have the controller interface give a more useful message than
30110 "Internal Error" in response to failed GETINFO requests.
30111 - Warn when the same option is provided more than once in a torrc
30112 file, on the command line, or in a single SETCONF statement, and
30113 the option is one that only accepts a single line. Closes bug 1384.
30114 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
30115 Patch from mingw-san.
30116 - Add support for the country code "{??}" in torrc options like
30117 ExcludeNodes, to indicate all routers of unknown country. Closes
30119 - Relays report the number of bytes spent on answering directory
30120 requests in extra-info descriptors similar to {read,write}-history.
30121 Implements enhancement 1790.
30123 o Minor bugfixes (on 0.2.1.x and earlier):
30124 - Complain if PublishServerDescriptor is given multiple arguments that
30125 include 0 or 1. This configuration will be rejected in the future.
30126 Bugfix on 0.2.0.1-alpha; closes bug 1107.
30127 - Disallow BridgeRelay 1 and ORPort 0 at once in the configuration.
30128 Bugfix on 0.2.0.13-alpha; closes bug 928.
30129 - Change "Application request when we're believed to be offline."
30130 notice to "Application request when we haven't used client
30131 functionality lately.", to clarify that it's not an error. Bugfix
30132 on 0.0.9.3; fixes bug 1222.
30133 - Fix a bug in the controller interface where "GETINFO ns/asdaskljkl"
30134 would return "551 Internal error" rather than "552 Unrecognized key
30135 ns/asdaskljkl". Bugfix on 0.1.2.3-alpha.
30136 - Users can't configure a regular relay to be their bridge. It didn't
30137 work because when Tor fetched the bridge descriptor, it found
30138 that it already had it, and didn't realize that the purpose of the
30139 descriptor had changed. Now we replace routers with a purpose other
30140 than bridge with bridge descriptors when fetching them. Bugfix on
30141 0.1.1.9-alpha. Bug 1776 not yet fixed because now we immediately
30142 refetch the descriptor with router purpose 'general', disabling
30144 - Fix a rare bug in rend_fn unit tests: we would fail a test when
30145 a randomly generated port is 0. Diagnosed by Matt Edman. Bugfix
30146 on 0.2.0.10-alpha; fixes bug 1808.
30147 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
30148 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
30149 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
30150 Servers can start sending this code when enough clients recognize
30151 it. Also update the spec to reflect this new reason. Bugfix on
30152 0.1.0.1-rc; fixes part of bug 1793.
30153 - Delay geoip stats collection by bridges for 6 hours, not 2 hours,
30154 when we switch from being a public relay to a bridge. Otherwise
30155 there will still be clients that see the relay in their consensus,
30156 and the stats will end up wrong. Bugfix on 0.2.1.15-rc; fixes bug
30158 - Instead of giving an assertion failure on an internal mismatch
30159 on estimated freelist size, just log a BUG warning and try later.
30160 Mitigates but does not fix bug 1125.
30161 - Fix an assertion failure that could occur in caches or bridge users
30162 when using a very short voting interval on a testing network.
30163 Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on 0.2.0.8-alpha.
30165 o Minor bugfixes (on 0.2.2.x):
30166 - Alter directory authorities to always consider Exit-flagged nodes
30167 as potential Guard nodes in their votes. The actual decision to
30168 use Exits as Guards is done in the consensus bandwidth weights.
30169 Fixes bug 1294; bugfix on 0.2.2.10-alpha.
30170 - When the controller is reporting the purpose of circuits that
30171 didn't finish building before the circuit build timeout, it was
30172 printing UNKNOWN_13. Now print EXPIRED. Bugfix on 0.2.2.14-alpha.
30173 - Our libevent version parsing code couldn't handle versions like
30174 1.4.14b-stable and incorrectly warned the user about using an
30175 old and broken version of libevent. Treat 1.4.14b-stable like
30176 1.4.14-stable when parsing the version. Fixes bug 1731; bugfix
30178 - Don't use substitution references like $(VAR:MOD) when
30179 $(asciidoc_files) is empty -- make(1) on NetBSD transforms
30180 '$(:x)' to 'x' rather than the empty string. This bites us in
30181 doc/ when configured with --disable-asciidoc. Bugfix on
30182 0.2.2.9-alpha; fixes bug 1773.
30183 - Remove a spurious hidden service server-side log notice about
30184 "Ancient non-dirty circuits". Bugfix on 0.2.2.14-alpha; fixes
30186 - Fix compilation with --with-dmalloc set. Bugfix on 0.2.2.6-alpha;
30188 - Correctly report written bytes on linked connections. Found while
30189 implementing 1790. Bugfix on 0.2.2.4-alpha.
30190 - Fix three memory leaks: one in circuit_build_times_parse_state(),
30191 one in dirvote_add_signatures_to_pending_consensus(), and one every
30192 time we parse a v3 network consensus. Bugfixes on 0.2.2.14-alpha,
30193 0.2.2.6-alpha, and 0.2.2.10-alpha respectively; fixes bug 1831.
30195 o Code simplifications and refactoring:
30196 - Take a first step towards making or.h smaller by splitting out
30197 function definitions for all source files in src/or/. Leave
30198 structures and defines in or.h for now.
30199 - Remove a bunch of unused function declarations as well as a block of
30200 #if 0'd code from the unit tests. Closes bug 1824.
30201 - New unit tests for exit-port history statistics; refactored exit
30202 statistics code to be more easily tested.
30203 - Remove the old debian/ directory from the main Tor distribution.
30204 The official Tor-for-debian git repository lives at the URL
30205 https://git.torproject.org/debian/tor.git
30208 Changes in version 0.2.2.14-alpha - 2010-07-12
30209 Tor 0.2.2.14-alpha greatly improves client-side handling of
30210 circuit build timeouts, which are used to estimate speed and improve
30211 performance. We also move to a much better GeoIP database, port Tor to
30212 Windows CE, introduce new compile flags that improve code security,
30213 add an eighth v3 directory authority, and address a lot of more
30217 - Tor directory authorities no longer crash when started with a
30218 cached-microdesc-consensus file in their data directory. Bugfix
30219 on 0.2.2.6-alpha; fixes bug 1532.
30220 - Treat an unset $HOME like an empty $HOME rather than triggering an
30221 assert. Bugfix on 0.0.8pre1; fixes bug 1522.
30222 - Ignore negative and large circuit build timeout values that can
30223 happen during a suspend or hibernate. These values caused various
30224 asserts to fire. Bugfix on 0.2.2.2-alpha; fixes bug 1245.
30225 - Alter calculation of Pareto distribution parameter 'Xm' for
30226 Circuit Build Timeout learning to use the weighted average of the
30227 top N=3 modes (because we have three entry guards). Considering
30228 multiple modes should improve the timeout calculation in some cases,
30229 and prevent extremely high timeout values. Bugfix on 0.2.2.2-alpha;
30231 - Alter calculation of Pareto distribution parameter 'Alpha' to use a
30232 right censored distribution model. This approach improves over the
30233 synthetic timeout generation approach that was producing insanely
30234 high timeout values. Now we calculate build timeouts using truncated
30235 times. Bugfix on 0.2.2.2-alpha; fixes bugs 1245 and 1335.
30236 - Do not close circuits that are under construction when they reach
30237 the circuit build timeout. Instead, leave them building (but do not
30238 use them) for up until the time corresponding to the 95th percentile
30239 on the Pareto CDF or 60 seconds, whichever is greater. This is done
30240 to provide better data for the new Pareto model. This percentile
30241 can be controlled by the consensus.
30244 - Move to the June 2010 Maxmind GeoLite country db (rather than the
30245 June 2009 ip-to-country GeoIP db) for our statistics that count
30246 how many users relays are seeing from each country. Now we have
30247 more accurate data for many African countries.
30248 - Port Tor to build and run correctly on Windows CE systems, using
30249 the wcecompat library. Contributed by Valerio Lupi.
30250 - New "--enable-gcc-hardening" ./configure flag (off by default)
30251 to turn on gcc compile time hardening options. It ensures
30252 that signed ints have defined behavior (-fwrapv), enables
30253 -D_FORTIFY_SOURCE=2 (requiring -O2), adds stack smashing protection
30254 with canaries (-fstack-protector-all), turns on ASLR protection if
30255 supported by the kernel (-fPIE, -pie), and adds additional security
30256 related warnings. Verified to work on Mac OS X and Debian Lenny.
30257 - New "--enable-linker-hardening" ./configure flag (off by default)
30258 to turn on ELF specific hardening features (relro, now). This does
30259 not work with Mac OS X or any other non-ELF binary format.
30261 o New directory authorities:
30262 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
30266 - New config option "WarnUnsafeSocks 0" disables the warning that
30267 occurs whenever Tor receives a socks handshake using a version of
30268 the socks protocol that can only provide an IP address (rather
30269 than a hostname). Setups that do DNS locally over Tor are fine,
30270 and we shouldn't spam the logs in that case.
30271 - Convert the HACKING file to asciidoc, and add a few new sections
30272 to it, explaining how we use Git, how we make changelogs, and
30273 what should go in a patch.
30274 - Add a TIMEOUT_RATE keyword to the BUILDTIMEOUT_SET control port
30275 event, to give information on the current rate of circuit timeouts
30276 over our stored history.
30277 - Add ability to disable circuit build time learning via consensus
30278 parameter and via a LearnCircuitBuildTimeout config option. Also
30279 automatically disable circuit build time calculation if we are
30280 either a AuthoritativeDirectory, or if we fail to write our state
30281 file. Fixes bug 1296.
30282 - More gracefully handle corrupt state files, removing asserts
30283 in favor of saving a backup and resetting state.
30284 - Rename the "log.h" header to "torlog.h" so as to conflict with fewer
30288 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
30290 - When a2x fails, mention that the user could disable manpages instead
30291 of trying to fix their asciidoc installation.
30292 - Where available, use Libevent 2.0's periodic timers so that our
30293 once-per-second cleanup code gets called even more closely to
30294 once per second than it would otherwise. Fixes bug 943.
30295 - If you run a bridge that listens on multiple IP addresses, and
30296 some user configures a bridge address that uses a different IP
30297 address than your bridge writes in its router descriptor, and the
30298 user doesn't specify an identity key, their Tor would discard the
30299 descriptor because "it isn't one of our configured bridges", and
30300 fail to bootstrap. Now believe the descriptor and bootstrap anyway.
30301 Bugfix on 0.2.0.3-alpha.
30302 - If OpenSSL fails to make a duplicate of a private or public key, log
30303 an error message and try to exit cleanly. May help with debugging
30304 if bug 1209 ever remanifests.
30305 - Save a couple bytes in memory allocation every time we escape
30306 certain characters in a string. Patch from Florian Zumbiehl.
30307 - Make it explicit that we don't cannibalize one-hop circuits. This
30308 happens in the wild, but doesn't turn out to be a problem because
30309 we fortunately don't use those circuits. Many thanks to outofwords
30310 for the initial analysis and to swissknife who confirmed that
30311 two-hop circuits are actually created.
30312 - Make directory mirrors report non-zero dirreq-v[23]-shares again.
30313 Fixes bug 1564; bugfix on 0.2.2.9-alpha.
30314 - Eliminate a case where a circuit build time warning was displayed
30315 after network connectivity resumed. Bugfix on 0.2.2.2-alpha.
30318 Changes in version 0.2.1.26 - 2010-05-02
30319 Tor 0.2.1.26 addresses the recent connection and memory overload
30320 problems we've been seeing on relays, especially relays with their
30321 DirPort open. If your relay has been crashing, or you turned it off
30322 because it used too many resources, give this release a try.
30324 This release also fixes yet another instance of broken OpenSSL libraries
30325 that was causing some relays to drop out of the consensus.
30328 - Teach relays to defend themselves from connection overload. Relays
30329 now close idle circuits early if it looks like they were intended
30330 for directory fetches. Relays are also more aggressive about closing
30331 TLS connections that have no circuits on them. Such circuits are
30332 unlikely to be re-used, and tens of thousands of them were piling
30333 up at the fast relays, causing the relays to run out of sockets
30334 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
30335 their directory fetches over TLS).
30336 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
30337 that claim to be earlier than 0.9.8m, but which have in reality
30338 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
30339 behavior. Possible fix for some cases of bug 1346.
30340 - Directory mirrors were fetching relay descriptors only from v2
30341 directory authorities, rather than v3 authorities like they should.
30342 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
30343 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
30346 - Finally get rid of the deprecated and now harmful notion of "clique
30347 mode", where directory authorities maintain TLS connections to
30351 - In the util/threads test, no longer free the test_mutex before all
30352 worker threads have finished. Bugfix on 0.2.1.6-alpha.
30353 - The master thread could starve the worker threads quite badly on
30354 certain systems, causing them to run only partially in the allowed
30355 window. This resulted in test failures. Now the master thread sleeps
30356 occasionally for a few microseconds while the two worker-threads
30357 compete for the mutex. Bugfix on 0.2.0.1-alpha.
30360 Changes in version 0.2.2.13-alpha - 2010-04-24
30361 Tor 0.2.2.13-alpha addresses the recent connection and memory overload
30362 problems we've been seeing on relays, especially relays with their
30363 DirPort open. If your relay has been crashing, or you turned it off
30364 because it used too many resources, give this release a try.
30367 - Teach relays to defend themselves from connection overload. Relays
30368 now close idle circuits early if it looks like they were intended
30369 for directory fetches. Relays are also more aggressive about closing
30370 TLS connections that have no circuits on them. Such circuits are
30371 unlikely to be re-used, and tens of thousands of them were piling
30372 up at the fast relays, causing the relays to run out of sockets
30373 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
30374 their directory fetches over TLS).
30377 - Finally get rid of the deprecated and now harmful notion of "clique
30378 mode", where directory authorities maintain TLS connections to
30380 - Directory authorities now do an immediate reachability check as soon
30381 as they hear about a new relay. This change should slightly reduce
30382 the time between setting up a relay and getting listed as running
30383 in the consensus. It should also improve the time between setting
30384 up a bridge and seeing use by bridge users.
30385 - Directory authorities no longer launch a TLS connection to every
30386 relay as they startup. Now that we have 2k+ descriptors cached,
30387 the resulting network hiccup is becoming a burden. Besides,
30388 authorities already avoid voting about Running for the first half
30389 hour of their uptime.
30392 Changes in version 0.2.2.12-alpha - 2010-04-20
30393 Tor 0.2.2.12-alpha fixes a critical bug in how directory authorities
30394 handle and vote on descriptors. It was causing relays to drop out of
30398 - Many relays have been falling out of the consensus lately because
30399 not enough authorities know about their descriptor for them to get
30400 a majority of votes. When we deprecated the v2 directory protocol,
30401 we got rid of the only way that v3 authorities can hear from each
30402 other about other descriptors. Now authorities examine every v3
30403 vote for new descriptors, and fetch them from that authority. Bugfix
30405 - Fix two typos in tor_vasprintf() that broke the compile on Windows,
30406 and a warning in or.h related to bandwidth_weight_rule_t that
30407 prevented clean compile on OS X. Fixes bug 1363; bugfix on
30409 - Fix a segfault on relays when DirReqStatistics is enabled
30410 and 24 hours pass. Bug found by keb. Fixes bug 1365; bugfix on
30414 - Demote a confusing TLS warning that relay operators might get when
30415 someone tries to talk to their OrPort. It is neither the operator's
30416 fault nor can they do anything about it. Fixes bug 1364; bugfix
30420 Changes in version 0.2.2.11-alpha - 2010-04-15
30421 Tor 0.2.2.11-alpha fixes yet another instance of broken OpenSSL
30422 libraries that was causing some relays to drop out of the consensus.
30425 - Directory mirrors were fetching relay descriptors only from v2
30426 directory authorities, rather than v3 authorities like they should.
30427 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
30428 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
30429 - Fix a parsing error that made every possible value of
30430 CircPriorityHalflifeMsec get treated as "1 msec". Bugfix
30431 on 0.2.2.7-alpha. Rename CircPriorityHalflifeMsec to
30432 CircuitPriorityHalflifeMsec, so authorities can tell newer relays
30433 about the option without breaking older ones.
30434 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
30435 that claim to be earlier than 0.9.8m, but which have in reality
30436 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
30437 behavior. Possible fix for some cases of bug 1346.
30440 - Experiment with a more aggressive approach to preventing clients
30441 from making one-hop exit streams. Exit relays who want to try it
30442 out can set "RefuseUnknownExits 1" in their torrc, and then look
30443 for "Attempt by %s to open a stream" log messages. Let us know
30445 - Add support for statically linking zlib by specifying
30446 --enable-static-zlib, to go with our support for statically linking
30447 openssl and libevent. Resolves bug 1358.
30450 - Fix a segfault that happens whenever a Tor client that is using
30451 libevent2's bufferevents gets a hup signal. Bugfix on 0.2.2.5-alpha;
30453 - When we cleaned up the contrib/tor-exit-notice.html file, we left
30454 out the first line. Fixes bug 1295.
30455 - When building the manpage from a tarball, we required asciidoc, but
30456 the asciidoc -> roff/html conversion was already done for the
30457 tarball. Make 'make' complain only when we need asciidoc (either
30458 because we're compiling directly from git, or because we altered
30459 the asciidoc manpage in the tarball). Bugfix on 0.2.2.9-alpha.
30460 - When none of the directory authorities vote on any params, Tor
30461 segfaulted when trying to make the consensus from the votes. We
30462 didn't trigger the bug in practice, because authorities do include
30463 params in their votes. Bugfix on 0.2.2.10-alpha; fixes bug 1322.
30466 - In the util/threads test, no longer free the test_mutex before all
30467 worker threads have finished. Bugfix on 0.2.1.6-alpha.
30468 - The master thread could starve the worker threads quite badly on
30469 certain systems, causing them to run only partially in the allowed
30470 window. This resulted in test failures. Now the master thread sleeps
30471 occasionally for a few microseconds while the two worker-threads
30472 compete for the mutex. Bugfix on 0.2.0.1-alpha.
30475 Changes in version 0.2.2.10-alpha - 2010-03-07
30476 Tor 0.2.2.10-alpha fixes a regression introduced in 0.2.2.9-alpha that
30477 could prevent relays from guessing their IP address correctly. It also
30478 starts the groundwork for another client-side performance boost, since
30479 currently we're not making efficient use of relays that have both the
30480 Guard flag and the Exit flag.
30483 - Fix a regression from our patch for bug 1244 that caused relays
30484 to guess their IP address incorrectly if they didn't set Address
30485 in their torrc and/or their address fails to resolve. Bugfix on
30486 0.2.2.9-alpha; fixes bug 1269.
30488 o Major features (performance):
30489 - Directory authorities now compute consensus weightings that instruct
30490 clients how to weight relays flagged as Guard, Exit, Guard+Exit,
30491 and no flag. Clients that use these weightings will distribute
30492 network load more evenly across these different relay types. The
30493 weightings are in the consensus so we can change them globally in
30494 the future. Extra thanks to "outofwords" for finding some nasty
30495 security bugs in the first implementation of this feature.
30497 o Minor features (performance):
30498 - Always perform router selections using weighted relay bandwidth,
30499 even if we don't need a high capacity circuit at the time. Non-fast
30500 circuits now only differ from fast ones in that they can use relays
30501 not marked with the Fast flag. This "feature" could turn out to
30502 be a horrible bug; we should investigate more before it goes into
30506 - Allow disabling building of the manpages. Skipping the manpage
30507 speeds up the build considerably.
30509 o Minor bugfixes (on 0.2.2.x):
30510 - Fix a memleak in the EXTENDCIRCUIT logic. Spotted by coverity.
30511 Bugfix on 0.2.2.9-alpha.
30512 - Disallow values larger than INT32_MAX for PerConnBWRate|Burst
30513 config option. Bugfix on 0.2.2.7-alpha.
30514 - Ship the asciidoc-helper file in the tarball, so that people can
30515 build from source if they want to, and touching the .1.txt files
30516 doesn't break the build. Bugfix on 0.2.2.9-alpha.
30518 o Minor bugfixes (on 0.2.1.x or earlier):
30519 - Fix a dereference-then-NULL-check sequence when publishing
30520 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
30522 - Fix another dereference-then-NULL-check sequence. Bugfix on
30523 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
30524 - Make sure we treat potentially not NUL-terminated strings correctly.
30525 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
30527 o Code simplifications and refactoring:
30528 - Fix some urls in the exit notice file and make it XHTML1.1 strict
30529 compliant. Based on a patch from Christian Kujau.
30530 - Don't use sed in asciidoc-helper anymore.
30531 - Make the build process fail if asciidoc cannot be found and
30532 building with asciidoc isn't disabled.
30535 Changes in version 0.2.2.9-alpha - 2010-02-22
30536 Tor 0.2.2.9-alpha makes Tor work again on the latest OS X, updates the
30537 location of a directory authority, and cleans up a bunch of small bugs.
30539 o Directory authority changes:
30540 - Change IP address for dannenberg (v3 directory authority), and
30541 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
30542 service directory authority) from the list.
30545 - Make Tor work again on the latest OS X: when deciding whether to
30546 use strange flags to turn TLS renegotiation on, detect the OpenSSL
30547 version at run-time, not compile time. We need to do this because
30548 Apple doesn't update its dev-tools headers when it updates its
30549 libraries in a security patch.
30550 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
30551 that could happen on 32-bit platforms with 64-bit time_t. Also fix
30552 a memory leak when requesting a hidden service descriptor we've
30553 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
30555 - Authorities could be tricked into giving out the Exit flag to relays
30556 that didn't allow exiting to any ports. This bug could screw
30557 with load balancing and stats. Bugfix on 0.1.1.6-alpha; fixes bug
30558 1238. Bug discovered by Martin Kowalczyk.
30559 - When freeing a session key, zero it out completely. We only zeroed
30560 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
30561 patched by ekir. Fixes bug 1254.
30564 - Fix static compilation by listing the openssl libraries in the right
30565 order. Bugfix on Tor 0.2.2.8-alpha; fixes bug 1237.
30566 - Resume handling .exit hostnames in a special way: originally we
30567 stripped the .exit part and used the requested exit relay. In
30568 0.2.2.1-alpha we stopped treating them in any special way, meaning
30569 if you use a .exit address then Tor will pass it on to the exit
30570 relay. Now we reject the .exit stream outright, since that behavior
30571 might be more expected by the user. Found and diagnosed by Scott
30572 Bennett and Downie on or-talk.
30573 - Don't spam the controller with events when we have no file
30574 descriptors available. Bugfix on 0.2.1.5-alpha. (Rate-limiting
30575 for log messages was already solved from bug 748.)
30576 - Avoid a bogus overlapped memcpy in tor_addr_copy(). Reported by
30578 - Make the DNSPort option work with libevent 2.x. Don't alter the
30579 behavior for libevent 1.x. Fixes bug 1143. Found by SwissTorExit.
30580 - Emit a GUARD DROPPED controller event for a case we missed.
30581 - Make more fields in the controller protocol case-insensitive, since
30582 control-spec.txt said they were.
30583 - Refactor resolve_my_address() to not use gethostbyname() anymore.
30584 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
30585 - Fix a spec conformance issue: the network-status-version token
30586 must be the first token in a v3 consensus or vote. Discovered by
30587 parakeep. Bugfix on 0.2.0.3-alpha.
30589 o Code simplifications and refactoring:
30590 - Generate our manpage and HTML documentation using Asciidoc. This
30591 change should make it easier to maintain the documentation, and
30592 produce nicer HTML.
30593 - Remove the --enable-iphone option. According to reports from Marco
30594 Bonetti, Tor builds fine without any special tweaking on recent
30595 iPhone SDK versions.
30596 - Removed some unnecessary files from the source distribution. The
30597 AUTHORS file has now been merged into the people page on the
30598 website. The roadmaps and design doc can now be found in the
30599 projects directory in svn.
30600 - Enabled various circuit build timeout constants to be controlled
30601 by consensus parameters. Also set better defaults for these
30602 parameters based on experimentation on broadband and simulated
30603 high latency links.
30606 - The 'EXTENDCIRCUIT' control port command can now be used with
30607 a circ id of 0 and no path. This feature will cause Tor to build
30608 a new 'fast' general purpose circuit using its own path selection
30610 - Added a BUILDTIMEOUT_SET controller event to describe changes
30611 to the circuit build timeout.
30612 - Future-proof the controller protocol a bit by ignoring keyword
30613 arguments we do not recognize.
30614 - Expand homedirs passed to tor-checkkey. This should silence a
30615 coverity complaint about passing a user-supplied string into
30616 open() without checking it.
30619 Changes in version 0.2.1.25 - 2010-03-16
30620 Tor 0.2.1.25 fixes a regression introduced in 0.2.1.23 that could
30621 prevent relays from guessing their IP address correctly. It also fixes
30622 several minor potential security bugs.
30625 - Fix a regression from our patch for bug 1244 that caused relays
30626 to guess their IP address incorrectly if they didn't set Address
30627 in their torrc and/or their address fails to resolve. Bugfix on
30628 0.2.1.23; fixes bug 1269.
30629 - When freeing a session key, zero it out completely. We only zeroed
30630 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
30631 patched by ekir. Fixes bug 1254.
30634 - Fix a dereference-then-NULL-check sequence when publishing
30635 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
30637 - Fix another dereference-then-NULL-check sequence. Bugfix on
30638 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
30639 - Make sure we treat potentially not NUL-terminated strings correctly.
30640 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
30644 Changes in version 0.2.1.24 - 2010-02-21
30645 Tor 0.2.1.24 makes Tor work again on the latest OS X -- this time
30649 - Work correctly out-of-the-box with even more vendor-patched versions
30650 of OpenSSL. In particular, make it so Debian and OS X don't need
30651 customized patches to run/build.
30654 Changes in version 0.2.1.23 - 2010-02-13
30655 Tor 0.2.1.23 fixes a huge client-side performance bug, makes Tor work
30656 again on the latest OS X, and updates the location of a directory
30659 o Major bugfixes (performance):
30660 - We were selecting our guards uniformly at random, and then weighting
30661 which of our guards we'd use uniformly at random. This imbalance
30662 meant that Tor clients were severely limited on throughput (and
30663 probably latency too) by the first hop in their circuit. Now we
30664 select guards weighted by currently advertised bandwidth. We also
30665 automatically discard guards picked using the old algorithm. Fixes
30666 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
30669 - Make Tor work again on the latest OS X: when deciding whether to
30670 use strange flags to turn TLS renegotiation on, detect the OpenSSL
30671 version at run-time, not compile time. We need to do this because
30672 Apple doesn't update its dev-tools headers when it updates its
30673 libraries in a security patch.
30674 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
30675 that could happen on 32-bit platforms with 64-bit time_t. Also fix
30676 a memory leak when requesting a hidden service descriptor we've
30677 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
30680 o Directory authority changes:
30681 - Change IP address for dannenberg (v3 directory authority), and
30682 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
30683 service directory authority) from the list.
30686 - Refactor resolve_my_address() to not use gethostbyname() anymore.
30687 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
30690 - Avoid a mad rush at the beginning of each month when each client
30691 rotates half of its guards. Instead we spread the rotation out
30692 throughout the month, but we still avoid leaving a precise timestamp
30693 in the state file about when we first picked the guard. Improves
30694 over the behavior introduced in 0.1.2.17.
30697 Changes in version 0.2.2.8-alpha - 2010-01-26
30698 Tor 0.2.2.8-alpha fixes a crash bug in 0.2.2.7-alpha that has been
30699 causing bridge relays to disappear. If you're running a bridge,
30703 - Fix a memory corruption bug on bridges that occurred during the
30704 inclusion of stats data in extra-info descriptors. Also fix the
30705 interface for geoip_get_bridge_stats* to prevent similar bugs in
30706 the future. Diagnosis by Tas, patch by Karsten and Sebastian.
30707 Fixes bug 1208; bugfix on 0.2.2.7-alpha.
30710 - Ignore OutboundBindAddress when connecting to localhost.
30711 Connections to localhost need to come _from_ localhost, or else
30712 local servers (like DNS and outgoing HTTP/SOCKS proxies) will often
30716 Changes in version 0.2.2.7-alpha - 2010-01-19
30717 Tor 0.2.2.7-alpha fixes a huge client-side performance bug, as well
30718 as laying the groundwork for further relay-side performance fixes. It
30719 also starts cleaning up client behavior with respect to the EntryNodes,
30720 ExitNodes, and StrictNodes config options.
30722 This release also rotates two directory authority keys, due to a
30723 security breach of some of the Torproject servers.
30725 o Directory authority changes:
30726 - Rotate keys (both v3 identity and relay identity) for moria1
30729 o Major features (performance):
30730 - We were selecting our guards uniformly at random, and then weighting
30731 which of our guards we'd use uniformly at random. This imbalance
30732 meant that Tor clients were severely limited on throughput (and
30733 probably latency too) by the first hop in their circuit. Now we
30734 select guards weighted by currently advertised bandwidth. We also
30735 automatically discard guards picked using the old algorithm. Fixes
30736 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
30737 - When choosing which cells to relay first, relays can now favor
30738 circuits that have been quiet recently, to provide lower latency
30739 for low-volume circuits. By default, relays enable or disable this
30740 feature based on a setting in the consensus. You can override
30741 this default by using the new "CircuitPriorityHalflife" config
30742 option. Design and code by Ian Goldberg, Can Tang, and Chris
30744 - Add separate per-conn write limiting to go with the per-conn read
30745 limiting. We added a global write limit in Tor 0.1.2.5-alpha,
30746 but never per-conn write limits.
30747 - New consensus params "bwconnrate" and "bwconnburst" to let us
30748 rate-limit client connections as they enter the network. It's
30749 controlled in the consensus so we can turn it on and off for
30750 experiments. It's starting out off. Based on proposal 163.
30752 o Major features (relay selection options):
30753 - Switch to a StrictNodes config option, rather than the previous
30754 "StrictEntryNodes" / "StrictExitNodes" separation that was missing a
30755 "StrictExcludeNodes" option.
30756 - If EntryNodes, ExitNodes, ExcludeNodes, or ExcludeExitNodes
30757 change during a config reload, mark and discard all our origin
30758 circuits. This fix should address edge cases where we change the
30759 config options and but then choose a circuit that we created before
30761 - If EntryNodes or ExitNodes are set, be more willing to use an
30762 unsuitable (e.g. slow or unstable) circuit. The user asked for it,
30764 - Make EntryNodes config option much more aggressive even when
30765 StrictNodes is not set. Before it would prepend your requested
30766 entrynodes to your list of guard nodes, but feel free to use others
30767 after that. Now it chooses only from your EntryNodes if any of
30768 those are available, and only falls back to others if a) they're
30769 all down and b) StrictNodes is not set.
30770 - Now we refresh your entry guards from EntryNodes at each consensus
30771 fetch -- rather than just at startup and then they slowly rot as
30772 the network changes.
30775 - Stop bridge directory authorities from answering dbg-stability.txt
30776 directory queries, which would let people fetch a list of all
30777 bridge identities they track. Bugfix on 0.2.1.6-alpha.
30780 - Log a notice when we get a new control connection. Now it's easier
30781 for security-conscious users to recognize when a local application
30782 is knocking on their controller door. Suggested by bug 1196.
30783 - New config option "CircuitStreamTimeout" to override our internal
30784 timeout schedule for how many seconds until we detach a stream from
30785 a circuit and try a new circuit. If your network is particularly
30786 slow, you might want to set this to a number like 60.
30787 - New controller command "getinfo config-text". It returns the
30788 contents that Tor would write if you send it a SAVECONF command,
30789 so the controller can write the file to disk itself.
30790 - New options for SafeLogging to allow scrubbing only log messages
30791 generated while acting as a relay.
30792 - Ship the bridges spec file in the tarball too.
30793 - Avoid a mad rush at the beginning of each month when each client
30794 rotates half of its guards. Instead we spread the rotation out
30795 throughout the month, but we still avoid leaving a precise timestamp
30796 in the state file about when we first picked the guard. Improves
30797 over the behavior introduced in 0.1.2.17.
30799 o Minor bugfixes (compiling):
30800 - Fix compilation on OS X 10.3, which has a stub mlockall() but
30801 hides it. Bugfix on 0.2.2.6-alpha.
30802 - Fix compilation on Solaris by removing support for the
30803 DisableAllSwap config option. Solaris doesn't have an rlimit for
30804 mlockall, so we cannot use it safely. Fixes bug 1198; bugfix on
30807 o Minor bugfixes (crashes):
30808 - Do not segfault when writing buffer stats when we haven't observed
30809 a single circuit to report about. Found by Fabian Lanze. Bugfix on
30811 - If we're in the pathological case where there's no exit bandwidth
30812 but there is non-exit bandwidth, or no guard bandwidth but there
30813 is non-guard bandwidth, don't crash during path selection. Bugfix
30815 - Fix an impossible-to-actually-trigger buffer overflow in relay
30816 descriptor generation. Bugfix on 0.1.0.15.
30818 o Minor bugfixes (privacy):
30819 - Fix an instance where a Tor directory mirror might accidentally
30820 log the IP address of a misbehaving Tor client. Bugfix on
30822 - Don't list Windows capabilities in relay descriptors. We never made
30823 use of them, and maybe it's a bad idea to publish them. Bugfix
30826 o Minor bugfixes (other):
30827 - Resolve an edge case in path weighting that could make us misweight
30828 our relay selection. Fixes bug 1203; bugfix on 0.0.8rc1.
30829 - Fix statistics on client numbers by country as seen by bridges that
30830 were broken in 0.2.2.1-alpha. Also switch to reporting full 24-hour
30831 intervals instead of variable 12-to-48-hour intervals.
30832 - After we free an internal connection structure, overwrite it
30833 with a different memory value than we use for overwriting a freed
30834 internal circuit structure. Should help with debugging. Suggested
30836 - Update our OpenSSL 0.9.8l fix so that it works with OpenSSL 0.9.8m
30839 o Removed features:
30840 - Remove the HSAuthorityRecordStats option that version 0 hidden
30841 service authorities could have used to track statistics of overall
30842 hidden service usage.
30845 Changes in version 0.2.1.22 - 2010-01-19
30846 Tor 0.2.1.22 fixes a critical privacy problem in bridge directory
30847 authorities -- it would tell you its whole history of bridge descriptors
30848 if you make the right directory request. This stable update also
30849 rotates two of the seven v3 directory authority keys and locations.
30851 o Directory authority changes:
30852 - Rotate keys (both v3 identity and relay identity) for moria1
30856 - Stop bridge directory authorities from answering dbg-stability.txt
30857 directory queries, which would let people fetch a list of all
30858 bridge identities they track. Bugfix on 0.2.1.6-alpha.
30861 Changes in version 0.2.1.21 - 2009-12-21
30862 Tor 0.2.1.21 fixes an incompatibility with the most recent OpenSSL
30863 library. If you use Tor on Linux / Unix and you're getting SSL
30864 renegotiation errors, upgrading should help. We also recommend an
30865 upgrade if you're an exit relay.
30868 - Work around a security feature in OpenSSL 0.9.8l that prevents our
30869 handshake from working unless we explicitly tell OpenSSL that we
30870 are using SSL renegotiation safely. We are, of course, but OpenSSL
30871 0.9.8l won't work unless we say we are.
30872 - Avoid crashing if the client is trying to upload many bytes and the
30873 circuit gets torn down at the same time, or if the flip side
30874 happens on the exit relay. Bugfix on 0.2.0.1-alpha; fixes bug 1150.
30877 - Do not refuse to learn about authority certs and v2 networkstatus
30878 documents that are older than the latest consensus. This bug might
30879 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
30880 Spotted and fixed by xmux.
30881 - Fix a couple of very-hard-to-trigger memory leaks, and one hard-to-
30882 trigger platform-specific option misparsing case found by Coverity
30884 - Fix a compilation warning on Fedora 12 by removing an impossible-to-
30885 trigger assert. Fixes bug 1173.
30888 Changes in version 0.2.2.6-alpha - 2009-11-19
30889 Tor 0.2.2.6-alpha lays the groundwork for many upcoming features:
30890 support for the new lower-footprint "microdescriptor" directory design,
30891 future-proofing our consensus format against new hash functions or
30892 other changes, and an Android port. It also makes Tor compatible with
30893 the upcoming OpenSSL 0.9.8l release, and fixes a variety of bugs.
30896 - Directory authorities can now create, vote on, and serve multiple
30897 parallel formats of directory data as part of their voting process.
30898 Partially implements Proposal 162: "Publish the consensus in
30900 - Directory authorities can now agree on and publish small summaries
30901 of router information that clients can use in place of regular
30902 server descriptors. This transition will eventually allow clients
30903 to use far less bandwidth for downloading information about the
30904 network. Begins the implementation of Proposal 158: "Clients
30905 download consensus + microdescriptors".
30906 - The directory voting system is now extensible to use multiple hash
30907 algorithms for signatures and resource selection. Newer formats
30908 are signed with SHA256, with a possibility for moving to a better
30909 hash algorithm in the future.
30910 - New DisableAllSwap option. If set to 1, Tor will attempt to lock all
30911 current and future memory pages via mlockall(). On supported
30912 platforms (modern Linux and probably BSD but not Windows or OS X),
30913 this should effectively disable any and all attempts to page out
30914 memory. This option requires that you start your Tor as root --
30915 if you use DisableAllSwap, please consider using the User option
30916 to properly reduce the privileges of your Tor.
30917 - Numerous changes, bugfixes, and workarounds from Nathan Freitas
30918 to help Tor build correctly for Android phones.
30921 - Work around a security feature in OpenSSL 0.9.8l that prevents our
30922 handshake from working unless we explicitly tell OpenSSL that we
30923 are using SSL renegotiation safely. We are, but OpenSSL 0.9.8l
30924 won't work unless we say we are.
30927 - Fix a crash bug when trying to initialize the evdns module in
30928 Libevent 2. Bugfix on 0.2.1.16-rc.
30929 - Stop logging at severity 'warn' when some other Tor client tries
30930 to establish a circuit with us using weak DH keys. It's a protocol
30931 violation, but that doesn't mean ordinary users need to hear about
30932 it. Fixes the bug part of bug 1114. Bugfix on 0.1.0.13.
30933 - Do not refuse to learn about authority certs and v2 networkstatus
30934 documents that are older than the latest consensus. This bug might
30935 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
30936 Spotted and fixed by xmux.
30937 - Fix numerous small code-flaws found by Coverity Scan Rung 3.
30938 - If all authorities restart at once right before a consensus vote,
30939 nobody will vote about "Running", and clients will get a consensus
30940 with no usable relays. Instead, authorities refuse to build a
30941 consensus if this happens. Bugfix on 0.2.0.10-alpha; fixes bug 1066.
30942 - If your relay can't keep up with the number of incoming create
30943 cells, it would log one warning per failure into your logs. Limit
30944 warnings to 1 per minute. Bugfix on 0.0.2pre10; fixes bug 1042.
30945 - Bridges now use "reject *:*" as their default exit policy. Bugfix
30946 on 0.2.0.3-alpha; fixes bug 1113.
30947 - Fix a memory leak on directory authorities during voting that was
30948 introduced in 0.2.2.1-alpha. Found via valgrind.
30951 Changes in version 0.2.1.20 - 2009-10-15
30952 Tor 0.2.1.20 fixes a crash bug when you're accessing many hidden
30953 services at once, prepares for more performance improvements, and
30954 fixes a bunch of smaller bugs.
30956 The Windows and OS X bundles also include a more recent Vidalia,
30957 and switch from Privoxy to Polipo.
30959 The OS X installers are now drag and drop. It's best to un-install
30960 Tor/Vidalia and then install this new bundle, rather than upgrade. If
30961 you want to upgrade, you'll need to update the paths for Tor and Polipo
30962 in the Vidalia Settings window.
30965 - Send circuit or stream sendme cells when our window has decreased
30966 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
30967 by Karsten when testing the "reduce circuit window" performance
30968 patch. Bugfix on the 54th commit on Tor -- from July 2002,
30969 before the release of Tor 0.0.0. This is the new winner of the
30971 - Fix a remotely triggerable memory leak when a consensus document
30972 contains more than one signature from the same voter. Bugfix on
30974 - Avoid segfault in rare cases when finishing an introduction circuit
30975 as a client and finding out that we don't have an introduction key
30976 for it. Fixes bug 1073. Reported by Aaron Swartz.
30979 - Tor now reads the "circwindow" parameter out of the consensus,
30980 and uses that value for its circuit package window rather than the
30981 default of 1000 cells. Begins the implementation of proposal 168.
30983 o New directory authorities:
30984 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
30986 - Move moria1 and tonga to alternate IP addresses.
30989 - Fix a signed/unsigned compile warning in 0.2.1.19.
30990 - Fix possible segmentation fault on directory authorities. Bugfix on
30992 - Fix an extremely rare infinite recursion bug that could occur if
30993 we tried to log a message after shutting down the log subsystem.
30994 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
30995 - Fix an obscure bug where hidden services on 64-bit big-endian
30996 systems might mis-read the timestamp in v3 introduce cells, and
30997 refuse to connect back to the client. Discovered by "rotor".
30998 Bugfix on 0.2.1.6-alpha.
30999 - We were triggering a CLOCK_SKEW controller status event whenever
31000 we connect via the v2 connection protocol to any relay that has
31001 a wrong clock. Instead, we should only inform the controller when
31002 it's a trusted authority that claims our clock is wrong. Bugfix
31003 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
31004 - We were telling the controller about CHECKING_REACHABILITY and
31005 REACHABILITY_FAILED status events whenever we launch a testing
31006 circuit or notice that one has failed. Instead, only tell the
31007 controller when we want to inform the user of overall success or
31008 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
31010 - Don't warn when we're using a circuit that ends with a node
31011 excluded in ExcludeExitNodes, but the circuit is not used to access
31012 the outside world. This should help fix bug 1090. Bugfix on
31014 - Work around a small memory leak in some versions of OpenSSL that
31015 stopped the memory used by the hostname TLS extension from being
31019 - Add a "getinfo status/accepted-server-descriptor" controller
31020 command, which is the recommended way for controllers to learn
31021 whether our server descriptor has been successfully received by at
31022 least on directory authority. Un-recommend good-server-descriptor
31023 getinfo and status events until we have a better design for them.
31026 Changes in version 0.2.2.5-alpha - 2009-10-11
31027 Tor 0.2.2.5-alpha fixes a few compile problems in 0.2.2.4-alpha.
31030 - Make the tarball compile again. Oops. Bugfix on 0.2.2.4-alpha.
31032 o Directory authorities:
31033 - Temporarily (just for this release) move dizum to an alternate
31037 Changes in version 0.2.2.4-alpha - 2009-10-10
31038 Tor 0.2.2.4-alpha fixes more crash bugs in 0.2.2.2-alpha. It also
31039 introduces a new unit test framework, shifts directry authority
31040 addresses around to reduce the impact from recent blocking events,
31041 and fixes a few smaller bugs.
31044 - Fix several more asserts in the circuit_build_times code, for
31045 example one that causes Tor to fail to start once we have
31046 accumulated 5000 build times in the state file. Bugfixes on
31047 0.2.2.2-alpha; fixes bug 1108.
31049 o New directory authorities:
31050 - Move moria1 and Tonga to alternate IP addresses.
31053 - Log SSL state transitions at debug level during handshake, and
31054 include SSL states in error messages. This may help debug future
31055 SSL handshake issues.
31056 - Add a new "Handshake" log domain for activities that happen
31057 during the TLS handshake.
31058 - Revert to the "June 3 2009" ip-to-country file. The September one
31059 seems to have removed most US IP addresses.
31060 - Directory authorities now reject Tor relays with versions less than
31061 0.1.2.14. This step cuts out four relays from the current network,
31062 none of which are very big.
31065 - Fix a couple of smaller issues with gathering statistics. Bugfixes
31067 - Fix two memory leaks in the error case of
31068 circuit_build_times_parse_state(). Bugfix on 0.2.2.2-alpha.
31069 - Don't count one-hop circuits when we're estimating how long it
31070 takes circuits to build on average. Otherwise we'll set our circuit
31071 build timeout lower than we should. Bugfix on 0.2.2.2-alpha.
31072 - Directory authorities no longer change their opinion of, or vote on,
31073 whether a router is Running, unless they have themselves been
31074 online long enough to have some idea. Bugfix on 0.2.0.6-alpha.
31077 o Code simplifications and refactoring:
31078 - Revise our unit tests to use the "tinytest" framework, so we
31079 can run tests in their own processes, have smarter setup/teardown
31080 code, and so on. The unit test code has moved to its own
31081 subdirectory, and has been split into multiple modules.
31084 Changes in version 0.2.2.3-alpha - 2009-09-23
31085 Tor 0.2.2.3-alpha fixes a few crash bugs in 0.2.2.2-alpha.
31088 - Fix an overzealous assert in our new circuit build timeout code.
31089 Bugfix on 0.2.2.2-alpha; fixes bug 1103.
31092 - If the networkstatus consensus tells us that we should use a
31093 negative circuit package window, ignore it. Otherwise we'll
31094 believe it and then trigger an assert. Bugfix on 0.2.2.2-alpha.
31097 Changes in version 0.2.2.2-alpha - 2009-09-21
31098 Tor 0.2.2.2-alpha introduces our latest performance improvement for
31099 clients: Tor tracks the average time it takes to build a circuit, and
31100 avoids using circuits that take too long to build. For fast connections,
31101 this feature can cut your expected latency in half. For slow or flaky
31102 connections, it could ruin your Tor experience. Let us know if it does!
31105 - Tor now tracks how long it takes to build client-side circuits
31106 over time, and adapts its timeout to local network performance.
31107 Since a circuit that takes a long time to build will also provide
31108 bad performance, we get significant latency improvements by
31109 discarding the slowest 20% of circuits. Specifically, Tor creates
31110 circuits more aggressively than usual until it has enough data
31111 points for a good timeout estimate. Implements proposal 151.
31112 We are especially looking for reports (good and bad) from users with
31113 both EDGE and broadband connections that can move from broadband
31114 to EDGE and find out if the build-time data in the .tor/state gets
31115 reset without loss of Tor usability. You should also see a notice
31116 log message telling you that Tor has reset its timeout.
31117 - Directory authorities can now vote on arbitrary integer values as
31118 part of the consensus process. This is designed to help set
31119 network-wide parameters. Implements proposal 167.
31120 - Tor now reads the "circwindow" parameter out of the consensus,
31121 and uses that value for its circuit package window rather than the
31122 default of 1000 cells. Begins the implementation of proposal 168.
31125 - Fix a remotely triggerable memory leak when a consensus document
31126 contains more than one signature from the same voter. Bugfix on
31130 - Fix an extremely rare infinite recursion bug that could occur if
31131 we tried to log a message after shutting down the log subsystem.
31132 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
31133 - Fix parsing for memory or time units given without a space between
31134 the number and the unit. Bugfix on 0.2.2.1-alpha; fixes bug 1076.
31135 - A networkstatus vote must contain exactly one signature. Spec
31136 conformance issue. Bugfix on 0.2.0.3-alpha.
31137 - Fix an obscure bug where hidden services on 64-bit big-endian
31138 systems might mis-read the timestamp in v3 introduce cells, and
31139 refuse to connect back to the client. Discovered by "rotor".
31140 Bugfix on 0.2.1.6-alpha.
31141 - We were triggering a CLOCK_SKEW controller status event whenever
31142 we connect via the v2 connection protocol to any relay that has
31143 a wrong clock. Instead, we should only inform the controller when
31144 it's a trusted authority that claims our clock is wrong. Bugfix
31145 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
31146 - We were telling the controller about CHECKING_REACHABILITY and
31147 REACHABILITY_FAILED status events whenever we launch a testing
31148 circuit or notice that one has failed. Instead, only tell the
31149 controller when we want to inform the user of overall success or
31150 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
31152 - Don't warn when we're using a circuit that ends with a node
31153 excluded in ExcludeExitNodes, but the circuit is not used to access
31154 the outside world. This should help fix bug 1090, but more problems
31155 remain. Bugfix on 0.2.1.6-alpha.
31156 - Work around a small memory leak in some versions of OpenSSL that
31157 stopped the memory used by the hostname TLS extension from being
31159 - Make our 'torify' script more portable; if we have only one of
31160 'torsocks' or 'tsocks' installed, don't complain to the user;
31161 and explain our warning about tsocks better.
31164 - Add a "getinfo status/accepted-server-descriptor" controller
31165 command, which is the recommended way for controllers to learn
31166 whether our server descriptor has been successfully received by at
31167 least on directory authority. Un-recommend good-server-descriptor
31168 getinfo and status events until we have a better design for them.
31169 - Update to the "September 4 2009" ip-to-country file.
31172 Changes in version 0.2.2.1-alpha - 2009-08-26
31173 Tor 0.2.2.1-alpha disables ".exit" address notation by default, allows
31174 Tor clients to bootstrap on networks where only port 80 is reachable,
31175 makes it more straightforward to support hardware crypto accelerators,
31176 and starts the groundwork for gathering stats safely at relays.
31179 - Start the process of disabling ".exit" address notation, since it
31180 can be used for a variety of esoteric application-level attacks
31181 on users. To reenable it, set "AllowDotExit 1" in your torrc. Fix
31184 o New directory authorities:
31185 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
31189 - New AccelName and AccelDir options add support for dynamic OpenSSL
31190 hardware crypto acceleration engines.
31191 - Tor now supports tunneling all of its outgoing connections over
31192 a SOCKS proxy, using the SOCKS4Proxy and/or SOCKS5Proxy
31193 configuration options. Code by Christopher Davis.
31196 - Send circuit or stream sendme cells when our window has decreased
31197 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
31198 by Karsten when testing the "reduce circuit window" performance
31199 patch. Bugfix on the 54th commit on Tor -- from July 2002,
31200 before the release of Tor 0.0.0. This is the new winner of the
31203 o New options for gathering stats safely:
31204 - Directory mirrors that set "DirReqStatistics 1" write statistics
31205 about directory requests to disk every 24 hours. As compared to the
31206 --enable-geoip-stats flag in 0.2.1.x, there are a few improvements:
31207 1) stats are written to disk exactly every 24 hours; 2) estimated
31208 shares of v2 and v3 requests are determined as mean values, not at
31209 the end of a measurement period; 3) unresolved requests are listed
31210 with country code '??'; 4) directories also measure download times.
31211 - Exit nodes that set "ExitPortStatistics 1" write statistics on the
31212 number of exit streams and transferred bytes per port to disk every
31214 - Relays that set "CellStatistics 1" write statistics on how long
31215 cells spend in their circuit queues to disk every 24 hours.
31216 - Entry nodes that set "EntryStatistics 1" write statistics on the
31217 rough number and origins of connecting clients to disk every 24
31219 - Relays that write any of the above statistics to disk and set
31220 "ExtraInfoStatistics 1" include the past 24 hours of statistics in
31221 their extra-info documents.
31224 - New --digests command-line switch to output the digests of the
31225 source files Tor was built with.
31226 - The "torify" script now uses torsocks where available.
31227 - The memarea code now uses a sentinel value at the end of each area
31228 to make sure nothing writes beyond the end of an area. This might
31229 help debug some conceivable causes of bug 930.
31230 - Time and memory units in the configuration file can now be set to
31231 fractional units. For example, "2.5 GB" is now a valid value for
31233 - Certain Tor clients (such as those behind check.torproject.org) may
31234 want to fetch the consensus in an extra early manner. To enable this
31235 a user may now set FetchDirInfoExtraEarly to 1. This also depends on
31236 setting FetchDirInfoEarly to 1. Previous behavior will stay the same
31237 as only certain clients who must have this information sooner should
31239 - Instead of adding the svn revision to the Tor version string, report
31240 the git commit (when we're building from a git checkout).
31243 - If any of the v3 certs we download are unparseable, we should
31244 actually notice the failure so we don't retry indefinitely. Bugfix
31245 on 0.2.0.x; reported by "rotator".
31246 - If the cached cert file is unparseable, warn but don't exit.
31247 - Fix possible segmentation fault on directory authorities. Bugfix on
31249 - When Tor fails to parse a descriptor of any kind, dump it to disk.
31250 Might help diagnosing bug 1051.
31252 o Deprecated and removed features:
31253 - The controller no longer accepts the old obsolete "addr-mappings/"
31254 or "unregistered-servers-" GETINFO values.
31255 - Hidden services no longer publish version 0 descriptors, and clients
31256 do not request or use version 0 descriptors. However, the old hidden
31257 service authorities still accept and serve version 0 descriptors
31258 when contacted by older hidden services/clients.
31259 - The EXTENDED_EVENTS and VERBOSE_NAMES controller features are now
31260 always on; using them is necessary for correct forward-compatible
31262 - Remove support for .noconnect style addresses. Nobody was using
31263 them, and they provided another avenue for detecting Tor users
31264 via application-level web tricks.
31266 o Packaging changes:
31267 - Upgrade Vidalia from 0.1.15 to 0.2.3 in the Windows and OS X
31268 installer bundles. See
31269 https://trac.vidalia-project.net/browser/vidalia/tags/vidalia-0.2.3/CHANGELOG
31270 for details of what's new in Vidalia 0.2.3.
31271 - Windows Vidalia Bundle: update Privoxy from 3.0.6 to 3.0.14-beta.
31272 - OS X Vidalia Bundle: move to Polipo 1.0.4 with Tor specific
31273 configuration file, rather than the old Privoxy.
31274 - OS X Vidalia Bundle: Vidalia, Tor, and Polipo are compiled as
31275 x86-only for better compatibility with OS X 10.6, aka Snow Leopard.
31276 - OS X Tor Expert Bundle: Tor is compiled as x86-only for
31277 better compatibility with OS X 10.6, aka Snow Leopard.
31278 - OS X Vidalia Bundle: The multi-package installer is now replaced
31279 by a simple drag and drop to the /Applications folder. This change
31280 occurred with the upgrade to Vidalia 0.2.3.
31283 Changes in version 0.2.1.19 - 2009-07-28
31284 Tor 0.2.1.19 fixes a major bug with accessing and providing hidden
31285 services on Tor 0.2.1.3-alpha through 0.2.1.18.
31288 - Make accessing hidden services on 0.2.1.x work right again.
31289 Bugfix on 0.2.1.3-alpha; workaround for bug 1038. Diagnosis and
31290 part of patch provided by "optimist".
31293 - When a relay/bridge is writing out its identity key fingerprint to
31294 the "fingerprint" file and to its logs, write it without spaces. Now
31295 it will look like the fingerprints in our bridges documentation,
31296 and confuse fewer users.
31299 - Relays no longer publish a new server descriptor if they change
31300 their MaxAdvertisedBandwidth config option but it doesn't end up
31301 changing their advertised bandwidth numbers. Bugfix on 0.2.0.28-rc;
31302 fixes bug 1026. Patch from Sebastian.
31303 - Avoid leaking memory every time we get a create cell but we have
31304 so many already queued that we refuse it. Bugfix on 0.2.0.19-alpha;
31305 fixes bug 1034. Reported by BarkerJr.
31308 Changes in version 0.2.1.18 - 2009-07-24
31309 Tor 0.2.1.18 lays the foundations for performance improvements,
31310 adds status events to help users diagnose bootstrap problems, adds
31311 optional authentication/authorization for hidden services, fixes a
31312 variety of potential anonymity problems, and includes a huge pile of
31313 other features and bug fixes.
31316 - Add LIBS=-lrt to Makefile.am so the Tor RPMs use a static libevent.
31319 Changes in version 0.2.1.17-rc - 2009-07-07
31320 Tor 0.2.1.17-rc marks the fourth -- and hopefully last -- release
31321 candidate for the 0.2.1.x series. It lays the groundwork for further
31322 client performance improvements, and also fixes a big bug with directory
31323 authorities that were causing them to assign Guard and Stable flags
31326 The Windows bundles also finally include the geoip database that we
31327 thought we'd been shipping since 0.2.0.x (oops), and the OS X bundles
31328 should actually install Torbutton rather than giving you a cryptic
31329 failure message (oops).
31332 - Clients now use the bandwidth values in the consensus, rather than
31333 the bandwidth values in each relay descriptor. This approach opens
31334 the door to more accurate bandwidth estimates once the directory
31335 authorities start doing active measurements. Implements more of
31339 - When Tor clients restart after 1-5 days, they discard all their
31340 cached descriptors as too old, but they still use the cached
31341 consensus document. This approach is good for robustness, but
31342 bad for performance: since they don't know any bandwidths, they
31343 end up choosing at random rather than weighting their choice by
31344 speed. Fixed by the above feature of putting bandwidths in the
31345 consensus. Bugfix on 0.2.0.x.
31346 - Directory authorities were neglecting to mark relays down in their
31347 internal histories if the relays fall off the routerlist without
31348 ever being found unreachable. So there were relays in the histories
31349 that haven't been seen for eight months, and are listed as being
31350 up for eight months. This wreaked havoc on the "median wfu"
31351 and "median mtbf" calculations, in turn making Guard and Stable
31352 flags very wrong, hurting network performance. Fixes bugs 696 and
31353 969. Bugfix on 0.2.0.6-alpha.
31356 - Serve the DirPortFrontPage page even when we have been approaching
31357 our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha.
31358 - The control port would close the connection before flushing long
31359 replies, such as the network consensus, if a QUIT command was issued
31360 before the reply had completed. Now, the control port flushes all
31361 pending replies before closing the connection. Also fixed a spurious
31362 warning when a QUIT command is issued after a malformed or rejected
31363 AUTHENTICATE command, but before the connection was closed. Patch
31364 by Marcus Griep. Bugfix on 0.2.0.x; fixes bugs 1015 and 1016.
31365 - When we can't find an intro key for a v2 hidden service descriptor,
31366 fall back to the v0 hidden service descriptor and log a bug message.
31367 Workaround for bug 1024.
31368 - Fix a log message that did not respect the SafeLogging option.
31372 - If we're a relay and we change our IP address, be more verbose
31373 about the reason that made us change. Should help track down
31374 further bugs for relays on dynamic IP addresses.
31377 Changes in version 0.2.0.35 - 2009-06-24
31379 - Avoid crashing in the presence of certain malformed descriptors.
31380 Found by lark, and by automated fuzzing.
31381 - Fix an edge case where a malicious exit relay could convince a
31382 controller that the client's DNS question resolves to an internal IP
31383 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
31386 - Finally fix the bug where dynamic-IP relays disappear when their
31387 IP address changes: directory mirrors were mistakenly telling
31388 them their old address if they asked via begin_dir, so they
31389 never got an accurate answer about their new address, so they
31390 just vanished after a day. For belt-and-suspenders, relays that
31391 don't set Address in their config now avoid using begin_dir for
31392 all direct connections. Should fix bugs 827, 883, and 900.
31393 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
31394 that would occur on some exit nodes when DNS failures and timeouts
31395 occurred in certain patterns. Fix for bug 957.
31398 - When starting with a cache over a few days old, do not leak
31399 memory for the obsolete router descriptors in it. Bugfix on
31400 0.2.0.33; fixes bug 672.
31401 - Hidden service clients didn't use a cached service descriptor that
31402 was older than 15 minutes, but wouldn't fetch a new one either,
31403 because there was already one in the cache. Now, fetch a v2
31404 descriptor unless the same descriptor was added to the cache within
31405 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
31408 Changes in version 0.2.1.16-rc - 2009-06-20
31409 Tor 0.2.1.16-rc speeds up performance for fast exit relays, and fixes
31410 a bunch of minor bugs.
31413 - Fix an edge case where a malicious exit relay could convince a
31414 controller that the client's DNS question resolves to an internal IP
31415 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
31417 o Major performance improvements (on 0.2.0.x):
31418 - Disable and refactor some debugging checks that forced a linear scan
31419 over the whole server-side DNS cache. These accounted for over 50%
31420 of CPU time on a relatively busy exit node's gprof profile. Found
31422 - Disable some debugging checks that appeared in exit node profile
31426 - Update to the "June 3 2009" ip-to-country file.
31427 - Do not have tor-resolve automatically refuse all .onion addresses;
31428 if AutomapHostsOnResolve is set in your torrc, this will work fine.
31430 o Minor bugfixes (on 0.2.0.x):
31431 - Log correct error messages for DNS-related network errors on
31433 - Fix a race condition that could cause crashes or memory corruption
31434 when running as a server with a controller listening for log
31436 - Avoid crashing when we have a policy specified in a DirPolicy or
31437 SocksPolicy or ReachableAddresses option with ports set on it,
31438 and we re-load the policy. May fix bug 996.
31439 - Hidden service clients didn't use a cached service descriptor that
31440 was older than 15 minutes, but wouldn't fetch a new one either,
31441 because there was already one in the cache. Now, fetch a v2
31442 descriptor unless the same descriptor was added to the cache within
31443 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
31445 o Minor bugfixes (on 0.2.1.x):
31446 - Don't warn users about low port and hibernation mix when they
31447 provide a *ListenAddress directive to fix that. Bugfix on
31449 - When switching back and forth between bridge mode, do not start
31450 gathering GeoIP data until two hours have passed.
31451 - Do not complain that the user has requested an excluded node as
31452 an exit when the node is not really an exit. This could happen
31453 because the circuit was for testing, or an introduction point.
31457 Changes in version 0.2.1.15-rc - 2009-05-25
31458 Tor 0.2.1.15-rc marks the second release candidate for the 0.2.1.x
31459 series. It fixes a major bug on fast exit relays, as well as a variety
31460 of more minor bugs.
31462 o Major bugfixes (on 0.2.0.x):
31463 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
31464 that would occur on some exit nodes when DNS failures and timeouts
31465 occurred in certain patterns. Fix for bug 957.
31467 o Minor bugfixes (on 0.2.0.x):
31468 - Actually return -1 in the error case for read_bandwidth_usage().
31469 Harmless bug, since we currently don't care about the return value
31470 anywhere. Bugfix on 0.2.0.9-alpha.
31471 - Provide a more useful log message if bug 977 (related to buffer
31472 freelists) ever reappears, and do not crash right away.
31473 - Fix an assertion failure on 64-bit platforms when we allocated
31474 memory right up to the end of a memarea, then realigned the memory
31475 one step beyond the end. Fixes a possible cause of bug 930.
31476 - Protect the count of open sockets with a mutex, so we can't
31477 corrupt it when two threads are closing or opening sockets at once.
31478 Fix for bug 939. Bugfix on 0.2.0.1-alpha.
31479 - Don't allow a bridge to publish its router descriptor to a
31480 non-bridge directory authority. Fixes part of bug 932.
31481 - When we change to or from being a bridge, reset our counts of
31482 client usage by country. Fixes bug 932.
31483 - Fix a bug that made stream bandwidth get misreported to the
31485 - Stop using malloc_usable_size() to use more area than we had
31486 actually allocated: it was safe, but made valgrind really unhappy.
31487 - Fix a memory leak when v3 directory authorities load their keys
31488 and cert from disk. Bugfix on 0.2.0.1-alpha.
31490 o Minor bugfixes (on 0.2.1.x):
31491 - Fix use of freed memory when deciding to mark a non-addable
31492 descriptor as never-downloadable. Bugfix on 0.2.1.9-alpha.
31495 Changes in version 0.2.1.14-rc - 2009-04-12
31496 Tor 0.2.1.14-rc marks the first release candidate for the 0.2.1.x
31497 series. It begins fixing some major performance problems, and also
31498 finally addresses the bug that was causing relays on dynamic IP
31499 addresses to fall out of the directory.
31502 - Clients replace entry guards that were chosen more than a few months
31503 ago. This change should significantly improve client performance,
31504 especially once more people upgrade, since relays that have been
31505 a guard for a long time are currently overloaded.
31507 o Major bugfixes (on 0.2.0):
31508 - Finally fix the bug where dynamic-IP relays disappear when their
31509 IP address changes: directory mirrors were mistakenly telling
31510 them their old address if they asked via begin_dir, so they
31511 never got an accurate answer about their new address, so they
31512 just vanished after a day. For belt-and-suspenders, relays that
31513 don't set Address in their config now avoid using begin_dir for
31514 all direct connections. Should fix bugs 827, 883, and 900.
31515 - Relays were falling out of the networkstatus consensus for
31516 part of a day if they changed their local config but the
31517 authorities discarded their new descriptor as "not sufficiently
31518 different". Now directory authorities accept a descriptor as changed
31519 if bandwidthrate or bandwidthburst changed. Partial fix for bug 962;
31520 patch by Sebastian.
31521 - Avoid crashing in the presence of certain malformed descriptors.
31522 Found by lark, and by automated fuzzing.
31525 - When generating circuit events with verbose nicknames for
31526 controllers, try harder to look up nicknames for routers on a
31527 circuit. (Previously, we would look in the router descriptors we had
31528 for nicknames, but not in the consensus.) Partial fix for bug 941.
31529 - If the bridge config line doesn't specify a port, assume 443.
31530 This makes bridge lines a bit smaller and easier for users to
31532 - Raise the minimum bandwidth to be a relay from 20000 bytes to 20480
31533 bytes (aka 20KB/s), to match our documentation. Also update
31534 directory authorities so they always assign the Fast flag to relays
31535 with 20KB/s of capacity. Now people running relays won't suddenly
31536 find themselves not seeing any use, if the network gets faster
31538 - Update to the "April 3 2009" ip-to-country file.
31541 - Avoid trying to print raw memory to the logs when we decide to
31542 give up on downloading a given relay descriptor. Bugfix on
31544 - In tor-resolve, when the Tor client to use is specified by
31545 <hostname>:<port>, actually use the specified port rather than
31546 defaulting to 9050. Bugfix on 0.2.1.6-alpha.
31547 - Make directory usage recording work again. Bugfix on 0.2.1.6-alpha.
31548 - When starting with a cache over a few days old, do not leak
31549 memory for the obsolete router descriptors in it. Bugfix on
31551 - Avoid double-free on list of successfully uploaded hidden
31552 service discriptors. Fix for bug 948. Bugfix on 0.2.1.6-alpha.
31553 - Change memarea_strndup() implementation to work even when
31554 duplicating a string at the end of a page. This bug was
31555 harmless for now, but could have meant crashes later. Fix by
31556 lark. Bugfix on 0.2.1.1-alpha.
31557 - Limit uploaded directory documents to be 16M rather than 500K.
31558 The directory authorities were refusing v3 consensus votes from
31559 other authorities, since the votes are now 504K. Fixes bug 959;
31560 bugfix on 0.0.2pre17 (where we raised it from 50K to 500K ;).
31561 - Directory authorities should never send a 503 "busy" response to
31562 requests for votes or keys. Bugfix on 0.2.0.8-alpha; exposed by
31566 Changes in version 0.2.1.13-alpha - 2009-03-09
31567 Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and
31568 cleanups. We're finally getting close to a release candidate.
31571 - Correctly update the list of which countries we exclude as
31572 exits, when the GeoIP file is loaded or reloaded. Diagnosed by
31573 lark. Bugfix on 0.2.1.6-alpha.
31575 o Minor bugfixes (on 0.2.0.x and earlier):
31576 - Automatically detect MacOSX versions earlier than 10.4.0, and
31577 disable kqueue from inside Tor when running with these versions.
31578 We previously did this from the startup script, but that was no
31579 help to people who didn't use the startup script. Resolves bug 863.
31580 - When we had picked an exit node for a connection, but marked it as
31581 "optional", and it turned out we had no onion key for the exit,
31582 stop wanting that exit and try again. This situation may not
31583 be possible now, but will probably become feasible with proposal
31584 158. Spotted by rovv. Fixes another case of bug 752.
31585 - Clients no longer cache certificates for authorities they do not
31586 recognize. Bugfix on 0.2.0.9-alpha.
31587 - When we can't transmit a DNS request due to a network error, retry
31588 it after a while, and eventually transmit a failing response to
31589 the RESOLVED cell. Bugfix on 0.1.2.5-alpha.
31590 - If the controller claimed responsibility for a stream, but that
31591 stream never finished making its connection, it would live
31592 forever in circuit_wait state. Now we close it after SocksTimeout
31593 seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry.
31594 - Drop begin cells to a hidden service if they come from the middle
31595 of a circuit. Patch from lark.
31596 - When we erroneously receive two EXTEND cells for the same circuit
31597 ID on the same connection, drop the second. Patch from lark.
31598 - Fix a crash that occurs on exit nodes when a nameserver request
31599 timed out. Bugfix on 0.1.2.1-alpha; our CLEAR debugging code had
31600 been suppressing the bug since 0.1.2.10-alpha. Partial fix for
31602 - Do not assume that a stack-allocated character array will be
31603 64-bit aligned on platforms that demand that uint64_t access is
31604 aligned. Possible fix for bug 604.
31605 - Parse dates and IPv4 addresses in a locale- and libc-independent
31606 manner, to avoid platform-dependent behavior on malformed input.
31607 - Build correctly when configured to build outside the main source
31608 path. Patch from Michael Gold.
31609 - We were already rejecting relay begin cells with destination port
31610 of 0. Now also reject extend cells with destination port or address
31611 of 0. Suggested by lark.
31613 o Minor bugfixes (on 0.2.1.x):
31614 - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
31615 cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
31616 - If we're an exit node, scrub the IP address to which we are exiting
31617 in the logs. Bugfix on 0.2.1.8-alpha.
31620 - On Linux, use the prctl call to re-enable core dumps when the user
31622 - New controller event NEWCONSENSUS that lists the networkstatus
31623 lines for every recommended relay. Now controllers like Torflow
31624 can keep up-to-date on which relays they should be using.
31625 - Update to the "February 26 2009" ip-to-country file.
31628 Changes in version 0.2.0.34 - 2009-02-08
31629 Tor 0.2.0.34 features several more security-related fixes. You should
31630 upgrade, especially if you run an exit relay (remote crash) or a
31631 directory authority (remote infinite loop), or you're on an older
31632 (pre-XP) or not-recently-patched Windows (remote exploit).
31634 This release marks end-of-life for Tor 0.1.2.x. Those Tor versions
31635 have many known flaws, and nobody should be using them. You should
31636 upgrade. If you're using a Linux or BSD and its packages are obsolete,
31637 stop using those packages and upgrade anyway.
31640 - Fix an infinite-loop bug on handling corrupt votes under certain
31641 circumstances. Bugfix on 0.2.0.8-alpha.
31642 - Fix a temporary DoS vulnerability that could be performed by
31643 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
31644 - Avoid a potential crash on exit nodes when processing malformed
31645 input. Remote DoS opportunity. Bugfix on 0.2.0.33.
31646 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
31647 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
31650 - Fix compilation on systems where time_t is a 64-bit integer.
31651 Patch from Matthias Drochner.
31652 - Don't consider expiring already-closed client connections. Fixes
31653 bug 893. Bugfix on 0.0.2pre20.
31656 Changes in version 0.2.1.12-alpha - 2009-02-08
31657 Tor 0.2.1.12-alpha features several more security-related fixes. You
31658 should upgrade, especially if you run an exit relay (remote crash) or
31659 a directory authority (remote infinite loop), or you're on an older
31660 (pre-XP) or not-recently-patched Windows (remote exploit). It also
31661 includes a big pile of minor bugfixes and cleanups.
31664 - Fix an infinite-loop bug on handling corrupt votes under certain
31665 circumstances. Bugfix on 0.2.0.8-alpha.
31666 - Fix a temporary DoS vulnerability that could be performed by
31667 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
31668 - Avoid a potential crash on exit nodes when processing malformed
31669 input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
31672 - Let controllers actually ask for the "clients_seen" event for
31673 getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
31674 reported by Matt Edman.
31675 - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
31677 - Fix a bug in address parsing that was preventing bridges or hidden
31678 service targets from being at IPv6 addresses.
31679 - Solve a bug that kept hardware crypto acceleration from getting
31680 enabled when accounting was turned on. Fixes bug 907. Bugfix on
31682 - Remove a bash-ism from configure.in to build properly on non-Linux
31683 platforms. Bugfix on 0.2.1.1-alpha.
31684 - Fix code so authorities _actually_ send back X-Descriptor-Not-New
31685 headers. Bugfix on 0.2.0.10-alpha.
31686 - Don't consider expiring already-closed client connections. Fixes
31687 bug 893. Bugfix on 0.0.2pre20.
31688 - Fix another interesting corner-case of bug 891 spotted by rovv:
31689 Previously, if two hosts had different amounts of clock drift, and
31690 one of them created a new connection with just the wrong timing,
31691 the other might decide to deprecate the new connection erroneously.
31692 Bugfix on 0.1.1.13-alpha.
31693 - Resolve a very rare crash bug that could occur when the user forced
31694 a nameserver reconfiguration during the middle of a nameserver
31695 probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
31696 - Support changing value of ServerDNSRandomizeCase during SIGHUP.
31697 Bugfix on 0.2.1.7-alpha.
31698 - If we're using bridges and our network goes away, be more willing
31699 to forgive our bridges and try again when we get an application
31700 request. Bugfix on 0.2.0.x.
31703 - Support platforms where time_t is 64 bits long. (Congratulations,
31704 NetBSD!) Patch from Matthias Drochner.
31705 - Add a 'getinfo status/clients-seen' controller command, in case
31706 controllers want to hear clients_seen events but connect late.
31709 - Disable GCC's strict alias optimization by default, to avoid the
31710 likelihood of its introducing subtle bugs whenever our code violates
31711 the letter of C99's alias rules.
31714 Changes in version 0.2.0.33 - 2009-01-21
31715 Tor 0.2.0.33 fixes a variety of bugs that were making relays less
31716 useful to users. It also finally fixes a bug where a relay or client
31717 that's been off for many days would take a long time to bootstrap.
31719 This update also fixes an important security-related bug reported by
31720 Ilja van Sprundel. You should upgrade. (We'll send out more details
31721 about the bug once people have had some time to upgrade.)
31724 - Fix a heap-corruption bug that may be remotely triggerable on
31725 some platforms. Reported by Ilja van Sprundel.
31728 - When a stream at an exit relay is in state "resolving" or
31729 "connecting" and it receives an "end" relay cell, the exit relay
31730 would silently ignore the end cell and not close the stream. If
31731 the client never closes the circuit, then the exit relay never
31732 closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
31733 reported by "wood".
31734 - When sending CREATED cells back for a given circuit, use a 64-bit
31735 connection ID to find the right connection, rather than an addr:port
31736 combination. Now that we can have multiple OR connections between
31737 the same ORs, it is no longer possible to use addr:port to uniquely
31738 identify a connection.
31739 - Bridge relays that had DirPort set to 0 would stop fetching
31740 descriptors shortly after startup, and then briefly resume
31741 after a new bandwidth test and/or after publishing a new bridge
31742 descriptor. Bridge users that try to bootstrap from them would
31743 get a recent networkstatus but would get descriptors from up to
31744 18 hours earlier, meaning most of the descriptors were obsolete
31745 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
31746 - Prevent bridge relays from serving their 'extrainfo' document
31747 to anybody who asks, now that extrainfo docs include potentially
31748 sensitive aggregated client geoip summaries. Bugfix on
31750 - If the cached networkstatus consensus is more than five days old,
31751 discard it rather than trying to use it. In theory it could be
31752 useful because it lists alternate directory mirrors, but in practice
31753 it just means we spend many minutes trying directory mirrors that
31754 are long gone from the network. Also discard router descriptors as
31755 we load them if they are more than five days old, since the onion
31756 key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
31759 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
31760 could make gcc generate non-functional binary search code. Bugfix
31762 - Build correctly on platforms without socklen_t.
31763 - Compile without warnings on solaris.
31764 - Avoid potential crash on internal error during signature collection.
31765 Fixes bug 864. Patch from rovv.
31766 - Correct handling of possible malformed authority signing key
31767 certificates with internal signature types. Fixes bug 880.
31768 Bugfix on 0.2.0.3-alpha.
31769 - Fix a hard-to-trigger resource leak when logging credential status.
31771 - When we can't initialize DNS because the network is down, do not
31772 automatically stop Tor from starting. Instead, we retry failed
31773 dns_init() every 10 minutes, and change the exit policy to reject
31774 *:* until one succeeds. Fixes bug 691.
31775 - Use 64 bits instead of 32 bits for connection identifiers used with
31776 the controller protocol, to greatly reduce risk of identifier reuse.
31777 - When we're choosing an exit node for a circuit, and we have
31778 no pending streams, choose a good general exit rather than one that
31779 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
31780 - Fix another case of assuming, when a specific exit is requested,
31781 that we know more than the user about what hosts it allows.
31782 Fixes one case of bug 752. Patch from rovv.
31783 - Clip the MaxCircuitDirtiness config option to a minimum of 10
31784 seconds. Warn the user if lower values are given in the
31785 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
31786 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
31787 user if lower values are given in the configuration. Bugfix on
31788 0.1.1.17-rc. Patch by Sebastian.
31789 - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
31790 the cache because we already had a v0 descriptor with the same ID.
31791 Bugfix on 0.2.0.18-alpha.
31792 - Fix a race condition when freeing keys shared between main thread
31793 and CPU workers that could result in a memory leak. Bugfix on
31794 0.1.0.1-rc. Fixes bug 889.
31795 - Send a valid END cell back when a client tries to connect to a
31796 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
31797 840. Patch from rovv.
31798 - Check which hops rendezvous stream cells are associated with to
31799 prevent possible guess-the-streamid injection attacks from
31800 intermediate hops. Fixes another case of bug 446. Based on patch
31802 - If a broken client asks a non-exit router to connect somewhere,
31803 do not even do the DNS lookup before rejecting the connection.
31804 Fixes another case of bug 619. Patch from rovv.
31805 - When a relay gets a create cell it can't decrypt (e.g. because it's
31806 using the wrong onion key), we were dropping it and letting the
31807 client time out. Now actually answer with a destroy cell. Fixes
31808 bug 904. Bugfix on 0.0.2pre8.
31810 o Minor bugfixes (hidden services):
31811 - Do not throw away existing introduction points on SIGHUP. Bugfix on
31812 0.0.6pre1. Patch by Karsten. Fixes bug 874.
31815 - Report the case where all signatures in a detached set are rejected
31816 differently than the case where there is an error handling the
31818 - When we realize that another process has modified our cached
31819 descriptors, print out a more useful error message rather than
31820 triggering an assertion. Fixes bug 885. Patch from Karsten.
31821 - Implement the 0x20 hack to better resist DNS poisoning: set the
31822 case on outgoing DNS requests randomly, and reject responses that do
31823 not match the case correctly. This logic can be disabled with the
31824 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
31825 of servers that do not reliably preserve case in replies. See
31826 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
31828 - Check DNS replies for more matching fields to better resist DNS
31830 - Never use OpenSSL compression: it wastes RAM and CPU trying to
31831 compress cells, which are basically all encrypted, compressed, or
31835 Changes in version 0.2.1.11-alpha - 2009-01-20
31836 Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a
31837 week it will take a long time to bootstrap again" bug. It also fixes
31838 an important security-related bug reported by Ilja van Sprundel. You
31839 should upgrade. (We'll send out more details about the bug once people
31840 have had some time to upgrade.)
31843 - Fix a heap-corruption bug that may be remotely triggerable on
31844 some platforms. Reported by Ilja van Sprundel.
31847 - Discard router descriptors as we load them if they are more than
31848 five days old. Otherwise if Tor is off for a long time and then
31849 starts with cached descriptors, it will try to use the onion
31850 keys in those obsolete descriptors when building circuits. Bugfix
31851 on 0.2.0.x. Fixes bug 887.
31854 - Try to make sure that the version of Libevent we're running with
31855 is binary-compatible with the one we built with. May address bug
31857 - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
31858 for bug 905. Bugfix on 0.2.1.7-alpha.
31859 - Add a new --enable-local-appdata configuration switch to change
31860 the default location of the datadir on win32 from APPDATA to
31861 LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
31862 entirely. Patch from coderman.
31865 - Make outbound DNS packets respect the OutboundBindAddress setting.
31866 Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
31867 - When our circuit fails at the first hop (e.g. we get a destroy
31868 cell back), avoid using that OR connection anymore, and also
31869 tell all the one-hop directory requests waiting for it that they
31870 should fail. Bugfix on 0.2.1.3-alpha.
31871 - In the torify(1) manpage, mention that tsocks will leak your
31875 Changes in version 0.2.1.10-alpha - 2009-01-06
31876 Tor 0.2.1.10-alpha fixes two major bugs in bridge relays (one that
31877 would make the bridge relay not so useful if it had DirPort set to 0,
31878 and one that could let an attacker learn a little bit of information
31879 about the bridge's users), and a bug that would cause your Tor relay
31880 to ignore a circuit create request it can't decrypt (rather than reply
31881 with an error). It also fixes a wide variety of other bugs.
31884 - If the cached networkstatus consensus is more than five days old,
31885 discard it rather than trying to use it. In theory it could
31886 be useful because it lists alternate directory mirrors, but in
31887 practice it just means we spend many minutes trying directory
31888 mirrors that are long gone from the network. Helps bug 887 a bit;
31890 - Bridge relays that had DirPort set to 0 would stop fetching
31891 descriptors shortly after startup, and then briefly resume
31892 after a new bandwidth test and/or after publishing a new bridge
31893 descriptor. Bridge users that try to bootstrap from them would
31894 get a recent networkstatus but would get descriptors from up to
31895 18 hours earlier, meaning most of the descriptors were obsolete
31896 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
31897 - Prevent bridge relays from serving their 'extrainfo' document
31898 to anybody who asks, now that extrainfo docs include potentially
31899 sensitive aggregated client geoip summaries. Bugfix on
31903 - New controller event "clients_seen" to report a geoip-based summary
31904 of which countries we've seen clients from recently. Now controllers
31905 like Vidalia can show bridge operators that they're actually making
31907 - Build correctly against versions of OpenSSL 0.9.8 or later built
31908 without support for deprecated functions.
31909 - Update to the "December 19 2008" ip-to-country file.
31911 o Minor bugfixes (on 0.2.0.x):
31912 - Authorities now vote for the Stable flag for any router whose
31913 weighted MTBF is at least 5 days, regardless of the mean MTBF.
31914 - Do not remove routers as too old if we do not have any consensus
31915 document. Bugfix on 0.2.0.7-alpha.
31916 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
31917 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
31918 - When an exit relay resolves a stream address to a local IP address,
31919 do not just keep retrying that same exit relay over and
31920 over. Instead, just close the stream. Addresses bug 872. Bugfix
31921 on 0.2.0.32. Patch from rovv.
31922 - If a hidden service sends us an END cell, do not consider
31923 retrying the connection; just close it. Patch from rovv.
31924 - When we made bridge authorities stop serving bridge descriptors over
31925 unencrypted links, we also broke DirPort reachability testing for
31926 bridges. So bridges with a non-zero DirPort were printing spurious
31927 warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
31928 - When a relay gets a create cell it can't decrypt (e.g. because it's
31929 using the wrong onion key), we were dropping it and letting the
31930 client time out. Now actually answer with a destroy cell. Fixes
31931 bug 904. Bugfix on 0.0.2pre8.
31932 - Squeeze 2-5% out of client performance (according to oprofile) by
31933 improving the implementation of some policy-manipulation functions.
31935 o Minor bugfixes (on 0.2.1.x):
31936 - Make get_interface_address() function work properly again; stop
31937 guessing the wrong parts of our address as our address.
31938 - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
31939 send on that circuit. Otherwise we might violate the proposal-110
31940 limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
31942 - When we're sending non-EXTEND cells to the first hop in a circuit,
31943 for example to use an encrypted directory connection, we don't need
31944 to use RELAY_EARLY cells: the first hop knows what kind of cell
31945 it is, and nobody else can even see the cell type. Conserving
31946 RELAY_EARLY cells makes it easier to cannibalize circuits like
31948 - Stop logging nameserver addresses in reverse order.
31949 - If we are retrying a directory download slowly over and over, do
31950 not automatically give up after the 254th failure. Bugfix on
31952 - Resume reporting accurate "stream end" reasons to the local control
31953 port. They were lost in the changes for Proposal 148. Bugfix on
31956 o Deprecated and removed features:
31957 - The old "tor --version --version" command, which would print out
31958 the subversion "Id" of most of the source files, is now removed. It
31959 turned out to be less useful than we'd expected, and harder to
31962 o Code simplifications and refactoring:
31963 - Change our header file guard macros to be less likely to conflict
31964 with system headers. Adam Langley noticed that we were conflicting
31965 with log.h on Android.
31966 - Tool-assisted documentation cleanup. Nearly every function or
31967 static variable in Tor should have its own documentation now.
31970 Changes in version 0.2.1.9-alpha - 2008-12-25
31971 Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
31973 o New directory authorities:
31974 - gabelmoo (the authority run by Karsten Loesing) now has a new
31978 - Never use a connection with a mismatched address to extend a
31979 circuit, unless that connection is canonical. A canonical
31980 connection is one whose address is authenticated by the router's
31981 identity key, either in a NETINFO cell or in a router descriptor.
31982 - Avoid a possible memory corruption bug when receiving hidden service
31983 descriptors. Bugfix on 0.2.1.6-alpha.
31986 - Fix a logic error that would automatically reject all but the first
31987 configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
31988 part of bug 813/868. Bug spotted by coderman.
31989 - When a stream at an exit relay is in state "resolving" or
31990 "connecting" and it receives an "end" relay cell, the exit relay
31991 would silently ignore the end cell and not close the stream. If
31992 the client never closes the circuit, then the exit relay never
31993 closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
31994 reported by "wood".
31995 - When we can't initialize DNS because the network is down, do not
31996 automatically stop Tor from starting. Instead, retry failed
31997 dns_init() every 10 minutes, and change the exit policy to reject
31998 *:* until one succeeds. Fixes bug 691.
32001 - Give a better error message when an overzealous init script says
32002 "sudo -u username tor --user username". Makes Bug 882 easier for
32004 - When a directory authority gives us a new guess for our IP address,
32005 log which authority we used. Hopefully this will help us debug
32006 the recent complaints about bad IP address guesses.
32007 - Detect svn revision properly when we're using git-svn.
32008 - Try not to open more than one descriptor-downloading connection
32009 to an authority at once. This should reduce load on directory
32010 authorities. Fixes bug 366.
32011 - Add cross-certification to newly generated certificates, so that
32012 a signing key is enough information to look up a certificate.
32013 Partial implementation of proposal 157.
32014 - Start serving certificates by <identity digest, signing key digest>
32015 pairs. Partial implementation of proposal 157.
32016 - Clients now never report any stream end reason except 'MISC'.
32017 Implements proposal 148.
32018 - On platforms with a maximum syslog string length, truncate syslog
32019 messages to that length ourselves, rather than relying on the
32020 system to do it for us.
32021 - Optimize out calls to time(NULL) that occur for every IO operation,
32022 or for every cell. On systems where time() is a slow syscall,
32023 this fix will be slightly helpful.
32024 - Exit servers can now answer resolve requests for ip6.arpa addresses.
32025 - When we download a descriptor that we then immediately (as
32026 a directory authority) reject, do not retry downloading it right
32027 away. Should save some bandwidth on authorities. Fix for bug
32028 888. Patch by Sebastian Hahn.
32029 - When a download gets us zero good descriptors, do not notify
32030 Tor that new directory information has arrived.
32031 - Avoid some nasty corner cases in the logic for marking connections
32032 as too old or obsolete or noncanonical for circuits. Partial
32035 o Minor features (controller):
32036 - New CONSENSUS_ARRIVED event to note when a new consensus has
32037 been fetched and validated.
32038 - When we realize that another process has modified our cached
32039 descriptors file, print out a more useful error message rather
32040 than triggering an assertion. Fixes bug 885. Patch from Karsten.
32041 - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
32042 controllers to prevent SIGHUP from reloading the
32043 configuration. Fixes bug 856.
32046 - Resume using the correct "REASON=" stream when telling the
32047 controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
32048 - When a canonical connection appears later in our internal list
32049 than a noncanonical one for a given OR ID, always use the
32050 canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
32052 - Clip the MaxCircuitDirtiness config option to a minimum of 10
32053 seconds. Warn the user if lower values are given in the
32054 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
32055 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
32056 user if lower values are given in the configuration. Bugfix on
32057 0.1.1.17-rc. Patch by Sebastian.
32058 - Fix a race condition when freeing keys shared between main thread
32059 and CPU workers that could result in a memory leak. Bugfix on
32060 0.1.0.1-rc. Fixes bug 889.
32062 o Minor bugfixes (hidden services):
32063 - Do not throw away existing introduction points on SIGHUP (bugfix on
32064 0.0.6pre1); also, do not stall hidden services because we're
32065 throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
32066 by John Brooks. Patch by Karsten. Fixes bug 874.
32067 - Fix a memory leak when we decline to add a v2 rendezvous
32068 descriptor to the cache because we already had a v0 descriptor
32069 with the same ID. Bugfix on 0.2.0.18-alpha.
32071 o Deprecated and removed features:
32072 - RedirectExits has been removed. It was deprecated since
32074 - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
32075 has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
32076 - Cell pools are now always enabled; --disable-cell-pools is ignored.
32078 o Code simplifications and refactoring:
32079 - Rename the confusing or_is_obsolete field to the more appropriate
32080 is_bad_for_new_circs, and move it to or_connection_t where it
32082 - Move edge-only flags from connection_t to edge_connection_t: not
32083 only is this better coding, but on machines of plausible alignment,
32084 it should save 4-8 bytes per connection_t. "Every little bit helps."
32085 - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
32086 for consistency; keep old option working for backward compatibility.
32087 - Simplify the code for finding connections to use for a circuit.
32090 Changes in version 0.2.1.8-alpha - 2008-12-08
32091 Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
32092 builds better on unusual platforms like Solaris and old OS X, and
32093 fixes a variety of other issues.
32096 - New DirPortFrontPage option that takes an html file and publishes
32097 it as "/" on the DirPort. Now relay operators can provide a
32098 disclaimer without needing to set up a separate webserver. There's
32099 a sample disclaimer in contrib/tor-exit-notice.html.
32102 - When the client is choosing entry guards, now it selects at most
32103 one guard from a given relay family. Otherwise we could end up with
32104 all of our entry points into the network run by the same operator.
32105 Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
32108 - Fix a DOS opportunity during the voting signature collection process
32109 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
32110 - Fix a possible segfault when establishing an exit connection. Bugfix
32114 - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
32116 - Made Tor a little less aggressive about deleting expired
32117 certificates. Partial fix for bug 854.
32118 - Stop doing unaligned memory access that generated bus errors on
32119 sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
32120 - Fix a crash bug when changing EntryNodes from the controller. Bugfix
32121 on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
32122 - Make USR2 log-level switch take effect immediately. Bugfix on
32124 - If one win32 nameserver fails to get added, continue adding the
32125 rest, and don't automatically fail.
32126 - Use fcntl() for locking when flock() is not available. Should fix
32127 compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
32128 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
32129 could make gcc generate non-functional binary search code. Bugfix
32131 - Build correctly on platforms without socklen_t.
32132 - Avoid potential crash on internal error during signature collection.
32133 Fixes bug 864. Patch from rovv.
32134 - Do not use C's stdio library for writing to log files. This will
32135 improve logging performance by a minute amount, and will stop
32136 leaking fds when our disk is full. Fixes bug 861.
32137 - Stop erroneous use of O_APPEND in cases where we did not in fact
32138 want to re-seek to the end of a file before every last write().
32139 - Correct handling of possible malformed authority signing key
32140 certificates with internal signature types. Fixes bug 880. Bugfix
32142 - Fix a hard-to-trigger resource leak when logging credential status.
32146 - Directory mirrors no longer fetch the v1 directory or
32147 running-routers files. They are obsolete, and nobody asks for them
32148 anymore. This is the first step to making v1 authorities obsolete.
32150 o Minor features (controller):
32151 - Return circuit purposes in response to GETINFO circuit-status. Fixes
32155 Changes in version 0.2.0.32 - 2008-11-20
32156 Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
32157 packages (and maybe other packages) noticed by Theo de Raadt, fixes
32158 a smaller security flaw that might allow an attacker to access local
32159 services, further improves hidden service performance, and fixes a
32160 variety of other issues.
32163 - The "User" and "Group" config options did not clear the
32164 supplementary group entries for the Tor process. The "User" option
32165 is now more robust, and we now set the groups to the specified
32166 user's primary group. The "Group" option is now ignored. For more
32167 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
32168 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
32169 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
32170 - The "ClientDNSRejectInternalAddresses" config option wasn't being
32171 consistently obeyed: if an exit relay refuses a stream because its
32172 exit policy doesn't allow it, we would remember what IP address
32173 the relay said the destination address resolves to, even if it's
32174 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
32177 - Fix a DOS opportunity during the voting signature collection process
32178 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
32180 o Major bugfixes (hidden services):
32181 - When fetching v0 and v2 rendezvous service descriptors in parallel,
32182 we were failing the whole hidden service request when the v0
32183 descriptor fetch fails, even if the v2 fetch is still pending and
32184 might succeed. Similarly, if the last v2 fetch fails, we were
32185 failing the whole hidden service request even if a v0 fetch is
32186 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
32187 - When extending a circuit to a hidden service directory to upload a
32188 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
32189 requests failed, because the router descriptor has not been
32190 downloaded yet. In these cases, do not attempt to upload the
32191 rendezvous descriptor, but wait until the router descriptor is
32192 downloaded and retry. Likewise, do not attempt to fetch a rendezvous
32193 descriptor from a hidden service directory for which the router
32194 descriptor has not yet been downloaded. Fixes bug 767. Bugfix
32198 - Fix several infrequent memory leaks spotted by Coverity.
32199 - When testing for libevent functions, set the LDFLAGS variable
32200 correctly. Found by Riastradh.
32201 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
32202 bootstrapping with tunneled directory connections. Bugfix on
32203 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
32204 - When asked to connect to A.B.exit:80, if we don't know the IP for A
32205 and we know that server B rejects most-but-not all connections to
32206 port 80, we would previously reject the connection. Now, we assume
32207 the user knows what they were asking for. Fixes bug 752. Bugfix
32208 on 0.0.9rc5. Diagnosed by BarkerJr.
32209 - If we overrun our per-second write limits a little, count this as
32210 having used up our write allocation for the second, and choke
32211 outgoing directory writes. Previously, we had only counted this when
32212 we had met our limits precisely. Fixes bug 824. Patch from by rovv.
32213 Bugfix on 0.2.0.x (??).
32214 - Remove the old v2 directory authority 'lefkada' from the default
32215 list. It has been gone for many months.
32216 - Stop doing unaligned memory access that generated bus errors on
32217 sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
32218 - Make USR2 log-level switch take effect immediately. Bugfix on
32221 o Minor bugfixes (controller):
32222 - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
32223 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
32226 Changes in version 0.2.1.7-alpha - 2008-11-08
32227 Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
32228 packages (and maybe other packages) noticed by Theo de Raadt, fixes
32229 a smaller security flaw that might allow an attacker to access local
32230 services, adds better defense against DNS poisoning attacks on exit
32231 relays, further improves hidden service performance, and fixes a
32232 variety of other issues.
32235 - The "ClientDNSRejectInternalAddresses" config option wasn't being
32236 consistently obeyed: if an exit relay refuses a stream because its
32237 exit policy doesn't allow it, we would remember what IP address
32238 the relay said the destination address resolves to, even if it's
32239 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
32240 - The "User" and "Group" config options did not clear the
32241 supplementary group entries for the Tor process. The "User" option
32242 is now more robust, and we now set the groups to the specified
32243 user's primary group. The "Group" option is now ignored. For more
32244 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
32245 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
32246 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
32247 - Do not use or believe expired v3 authority certificates. Patch
32248 from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
32251 - Now NodeFamily and MyFamily config options allow spaces in
32252 identity fingerprints, so it's easier to paste them in.
32253 Suggested by Lucky Green.
32254 - Implement the 0x20 hack to better resist DNS poisoning: set the
32255 case on outgoing DNS requests randomly, and reject responses that do
32256 not match the case correctly. This logic can be disabled with the
32257 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
32258 of servers that do not reliably preserve case in replies. See
32259 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
32261 - Preserve case in replies to DNSPort requests in order to support
32262 the 0x20 hack for resisting DNS poisoning attacks.
32264 o Hidden service performance improvements:
32265 - When the client launches an introduction circuit, retry with a
32266 new circuit after 30 seconds rather than 60 seconds.
32267 - Launch a second client-side introduction circuit in parallel
32268 after a delay of 15 seconds (based on work by Christian Wilms).
32269 - Hidden services start out building five intro circuits rather
32270 than three, and when the first three finish they publish a service
32271 descriptor using those. Now we publish our service descriptor much
32272 faster after restart.
32275 - Minor fix in the warning messages when you're having problems
32276 bootstrapping; also, be more forgiving of bootstrap problems when
32277 we're still making incremental progress on a given bootstrap phase.
32278 - When we're choosing an exit node for a circuit, and we have
32279 no pending streams, choose a good general exit rather than one that
32280 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
32281 - Send a valid END cell back when a client tries to connect to a
32282 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
32283 840. Patch from rovv.
32284 - If a broken client asks a non-exit router to connect somewhere,
32285 do not even do the DNS lookup before rejecting the connection.
32286 Fixes another case of bug 619. Patch from rovv.
32287 - Fix another case of assuming, when a specific exit is requested,
32288 that we know more than the user about what hosts it allows.
32289 Fixes another case of bug 752. Patch from rovv.
32290 - Check which hops rendezvous stream cells are associated with to
32291 prevent possible guess-the-streamid injection attacks from
32292 intermediate hops. Fixes another case of bug 446. Based on patch
32294 - Avoid using a negative right-shift when comparing 32-bit
32295 addresses. Possible fix for bug 845 and bug 811.
32296 - Make the assert_circuit_ok() function work correctly on circuits that
32297 have already been marked for close.
32298 - Fix read-off-the-end-of-string error in unit tests when decoding
32299 introduction points.
32300 - Fix uninitialized size field for memory area allocation: may improve
32301 memory performance during directory parsing.
32302 - Treat duplicate certificate fetches as failures, so that we do
32303 not try to re-fetch an expired certificate over and over and over.
32304 - Do not say we're fetching a certificate when we'll in fact skip it
32305 because of a pending download.
32308 Changes in version 0.2.1.6-alpha - 2008-09-30
32309 Tor 0.2.1.6-alpha further improves performance and robustness of
32310 hidden services, starts work on supporting per-country relay selection,
32311 and fixes a variety of smaller issues.
32314 - Implement proposal 121: make it possible to build hidden services
32315 that only certain clients are allowed to connect to. This is
32316 enforced at several points, so that unauthorized clients are unable
32317 to send INTRODUCE cells to the service, or even (depending on the
32318 type of authentication) to learn introduction points. This feature
32319 raises the bar for certain kinds of active attacks against hidden
32320 services. Code by Karsten Loesing.
32321 - Relays now store and serve v2 hidden service descriptors by default,
32322 i.e., the new default value for HidServDirectoryV2 is 1. This is
32323 the last step in proposal 114, which aims to make hidden service
32324 lookups more reliable.
32325 - Start work to allow node restrictions to include country codes. The
32326 syntax to exclude nodes in a country with country code XX is
32327 "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
32328 refinement to decide what config options should take priority if
32329 you ask to both use a particular node and exclude it.
32330 - Allow ExitNodes list to include IP ranges and country codes, just
32331 like the Exclude*Nodes lists. Patch from Robert Hogan.
32334 - Fix a bug when parsing ports in tor_addr_port_parse() that caused
32335 Tor to fail to start if you had it configured to use a bridge
32336 relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
32337 - When extending a circuit to a hidden service directory to upload a
32338 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
32339 requests failed, because the router descriptor had not been
32340 downloaded yet. In these cases, we now wait until the router
32341 descriptor is downloaded, and then retry. Likewise, clients
32342 now skip over a hidden service directory if they don't yet have
32343 its router descriptor, rather than futilely requesting it and
32344 putting mysterious complaints in the logs. Fixes bug 767. Bugfix
32346 - When fetching v0 and v2 rendezvous service descriptors in parallel,
32347 we were failing the whole hidden service request when the v0
32348 descriptor fetch fails, even if the v2 fetch is still pending and
32349 might succeed. Similarly, if the last v2 fetch fails, we were
32350 failing the whole hidden service request even if a v0 fetch is
32351 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
32352 - DNS replies need to have names matching their requests, but
32353 these names should be in the questions section, not necessarily
32354 in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
32357 - Update to the "September 1 2008" ip-to-country file.
32358 - Allow ports 465 and 587 in the default exit policy again. We had
32359 rejected them in 0.1.0.15, because back in 2005 they were commonly
32360 misconfigured and ended up as spam targets. We hear they are better
32361 locked down these days.
32362 - Use a lockfile to make sure that two Tor processes are not
32363 simultaneously running with the same datadir.
32364 - Serve the latest v3 networkstatus consensus via the control
32365 port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
32366 - Better logging about stability/reliability calculations on directory
32368 - Drop the requirement to have an open dir port for storing and
32369 serving v2 hidden service descriptors.
32370 - Directory authorities now serve a /tor/dbg-stability.txt URL to
32371 help debug WFU and MTBF calculations.
32372 - Implement most of Proposal 152: allow specialized servers to permit
32373 single-hop circuits, and clients to use those servers to build
32374 single-hop circuits when using a specialized controller. Patch
32375 from Josh Albrecht. Resolves feature request 768.
32376 - Add a -p option to tor-resolve for specifying the SOCKS port: some
32377 people find host:port too confusing.
32378 - Make TrackHostExit mappings expire a while after their last use, not
32379 after their creation. Patch from Robert Hogan.
32380 - Provide circuit purposes along with circuit events to the controller.
32383 - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
32385 - Fixed some memory leaks -- some quite frequent, some almost
32386 impossible to trigger -- based on results from Coverity.
32387 - When testing for libevent functions, set the LDFLAGS variable
32388 correctly. Found by Riastradh.
32389 - Fix an assertion bug in parsing policy-related options; possible fix
32391 - Catch and report a few more bootstrapping failure cases when Tor
32392 fails to establish a TCP connection. Cleanup on 0.2.1.x.
32393 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
32394 bootstrapping with tunneled directory connections. Bugfix on
32395 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
32396 - When asked to connect to A.B.exit:80, if we don't know the IP for A
32397 and we know that server B rejects most-but-not all connections to
32398 port 80, we would previously reject the connection. Now, we assume
32399 the user knows what they were asking for. Fixes bug 752. Bugfix
32400 on 0.0.9rc5. Diagnosed by BarkerJr.
32401 - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
32402 service directories if they have no advertised dir port. Bugfix
32404 - If we overrun our per-second write limits a little, count this as
32405 having used up our write allocation for the second, and choke
32406 outgoing directory writes. Previously, we had only counted this when
32407 we had met our limits precisely. Fixes bug 824. Patch by rovv.
32408 Bugfix on 0.2.0.x (??).
32409 - Avoid a "0 divided by 0" calculation when calculating router uptime
32410 at directory authorities. Bugfix on 0.2.0.8-alpha.
32411 - Make DNS resolved controller events into "CLOSED", not
32412 "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
32414 - Fix a bug where an unreachable relay would establish enough
32415 reachability testing circuits to do a bandwidth test -- if
32416 we already have a connection to the middle hop of the testing
32417 circuit, then it could establish the last hop by using the existing
32418 connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
32419 circuits no longer use entry guards in 0.2.1.3-alpha.
32420 - If we have correct permissions on $datadir, we complain to stdout
32421 and fail to start. But dangerous permissions on
32422 $datadir/cached-status/ would cause us to open a log and complain
32423 there. Now complain to stdout and fail to start in both cases. Fixes
32424 bug 820, reported by seeess.
32425 - Remove the old v2 directory authority 'lefkada' from the default
32426 list. It has been gone for many months.
32428 o Code simplifications and refactoring:
32429 - Revise the connection_new functions so that a more typesafe variant
32430 exists. This will work better with Coverity, and let us find any
32431 actual mistakes we're making here.
32432 - Refactor unit testing logic so that dmalloc can be used sensibly
32433 with unit tests to check for memory leaks.
32434 - Move all hidden-service related fields from connection and circuit
32435 structure to substructures: this way they won't eat so much memory.
32438 Changes in version 0.2.0.31 - 2008-09-03
32439 Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
32440 a big bug we're seeing where in rare cases traffic from one Tor stream
32441 gets mixed into another stream, and fixes a variety of smaller issues.
32444 - Make sure that two circuits can never exist on the same connection
32445 with the same circuit ID, even if one is marked for close. This
32446 is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
32447 - Relays now reject risky extend cells: if the extend cell includes
32448 a digest of all zeroes, or asks to extend back to the relay that
32449 sent the extend cell, tear down the circuit. Ideas suggested
32451 - If not enough of our entry guards are available so we add a new
32452 one, we might use the new one even if it overlapped with the
32453 current circuit's exit relay (or its family). Anonymity bugfix
32454 pointed out by rovv.
32457 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
32458 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
32459 - Correctly detect the presence of the linux/netfilter_ipv4.h header
32460 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
32461 - Pick size of default geoip filename string correctly on windows.
32462 Fixes bug 806. Bugfix on 0.2.0.30.
32463 - Make the autoconf script accept the obsolete --with-ssl-dir
32464 option as an alias for the actually-working --with-openssl-dir
32465 option. Fix the help documentation to recommend --with-openssl-dir.
32466 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
32467 - When using the TransPort option on OpenBSD, and using the User
32468 option to change UID and drop privileges, make sure to open
32469 /dev/pf before dropping privileges. Fixes bug 782. Patch from
32470 Christopher Davis. Bugfix on 0.1.2.1-alpha.
32471 - Try to attach connections immediately upon receiving a RENDEZVOUS2
32472 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
32473 on the client side when connecting to a hidden service. Bugfix
32474 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
32475 - When closing an application-side connection because its circuit is
32476 getting torn down, generate the stream event correctly. Bugfix on
32477 0.1.2.x. Anonymous patch.
32480 Changes in version 0.2.1.5-alpha - 2008-08-31
32481 Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
32482 in a lot of the infrastructure for adding authorization to hidden
32483 services, lays the groundwork for having clients read their load
32484 balancing information out of the networkstatus consensus rather than
32485 the individual router descriptors, addresses two potential anonymity
32486 issues, and fixes a variety of smaller issues.
32489 - Convert many internal address representations to optionally hold
32491 - Generate and accept IPv6 addresses in many protocol elements.
32492 - Make resolver code handle nameservers located at ipv6 addresses.
32493 - Begin implementation of proposal 121 ("Client authorization for
32494 hidden services"): configure hidden services with client
32495 authorization, publish descriptors for them, and configure
32496 authorization data for hidden services at clients. The next
32497 step is to actually access hidden services that perform client
32499 - More progress toward proposal 141: Network status consensus
32500 documents and votes now contain bandwidth information for each
32501 router and a summary of that router's exit policy. Eventually this
32502 will be used by clients so that they do not have to download every
32503 known descriptor before building circuits.
32505 o Major bugfixes (on 0.2.0.x and before):
32506 - When sending CREATED cells back for a given circuit, use a 64-bit
32507 connection ID to find the right connection, rather than an addr:port
32508 combination. Now that we can have multiple OR connections between
32509 the same ORs, it is no longer possible to use addr:port to uniquely
32510 identify a connection.
32511 - Relays now reject risky extend cells: if the extend cell includes
32512 a digest of all zeroes, or asks to extend back to the relay that
32513 sent the extend cell, tear down the circuit. Ideas suggested
32515 - If not enough of our entry guards are available so we add a new
32516 one, we might use the new one even if it overlapped with the
32517 current circuit's exit relay (or its family). Anonymity bugfix
32518 pointed out by rovv.
32521 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
32522 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
32523 - When using the TransPort option on OpenBSD, and using the User
32524 option to change UID and drop privileges, make sure to open /dev/pf
32525 before dropping privileges. Fixes bug 782. Patch from Christopher
32526 Davis. Bugfix on 0.1.2.1-alpha.
32527 - Correctly detect the presence of the linux/netfilter_ipv4.h header
32528 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
32529 - Add a missing safe_str() call for a debug log message.
32530 - Use 64 bits instead of 32 bits for connection identifiers used with
32531 the controller protocol, to greatly reduce risk of identifier reuse.
32532 - Make the autoconf script accept the obsolete --with-ssl-dir
32533 option as an alias for the actually-working --with-openssl-dir
32534 option. Fix the help documentation to recommend --with-openssl-dir.
32535 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
32538 - Rate-limit too-many-sockets messages: when they happen, they happen
32539 a lot. Resolves bug 748.
32540 - Resist DNS poisoning a little better by making sure that names in
32541 answer sections match.
32542 - Print the SOCKS5 error message string as well as the error code
32543 when a tor-resolve request fails. Patch from Jacob.
32546 Changes in version 0.2.1.4-alpha - 2008-08-04
32547 Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
32550 - The address part of exit policies was not correctly written
32551 to router descriptors. This generated router descriptors that failed
32552 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
32554 - Tor triggered a false assert when extending a circuit to a relay
32555 but we already have a connection open to that relay. Noticed by
32556 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
32559 - Fix a hidden service logging bug: in some edge cases, the router
32560 descriptor of a previously picked introduction point becomes
32561 obsolete and we need to give up on it rather than continually
32562 complaining that it has become obsolete. Observed by xiando. Bugfix
32565 o Removed features:
32566 - Take out the TestVia config option, since it was a workaround for
32567 a bug that was fixed in Tor 0.1.1.21.
32570 Changes in version 0.2.1.3-alpha - 2008-08-03
32571 Tor 0.2.1.3-alpha implements most of the pieces to prevent
32572 infinite-length circuit attacks (see proposal 110); fixes a bug that
32573 might cause exit relays to corrupt streams they send back; allows
32574 address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
32575 ExcludeExitNodes config options; and fixes a big pile of bugs.
32577 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
32578 - Send a bootstrap problem "warn" event on the first problem if the
32579 reason is NO_ROUTE (that is, our network is down).
32582 - Implement most of proposal 110: The first K cells to be sent
32583 along a circuit are marked as special "early" cells; only K "early"
32584 cells will be allowed. Once this code is universal, we can block
32585 certain kinds of DOS attack by requiring that EXTEND commands must
32586 be sent using an "early" cell.
32589 - Try to attach connections immediately upon receiving a RENDEZVOUS2
32590 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
32591 on the client side when connecting to a hidden service. Bugfix
32592 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
32593 - Ensure that two circuits can never exist on the same connection
32594 with the same circuit ID, even if one is marked for close. This
32595 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
32598 - When relays do their initial bandwidth measurement, don't limit
32599 to just our entry guards for the test circuits. Otherwise we tend
32600 to have multiple test circuits going through a single entry guard,
32601 which makes our bandwidth test less accurate. Fixes part of bug 654;
32602 patch contributed by Josh Albrecht.
32603 - Add an ExcludeExitNodes option so users can list a set of nodes
32604 that should be be excluded from the exit node position, but
32605 allowed elsewhere. Implements proposal 151.
32606 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
32607 ExcludeNodes and ExcludeExitNodes lists.
32608 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
32609 be more efficient. Formerly it was quadratic in the number of
32610 servers; now it should be linear. Fixes bug 509.
32611 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
32612 and n_conn_id_digest fields into a separate structure that's
32613 only needed when the circuit has not yet attached to an n_conn.
32616 - Change the contrib/tor.logrotate script so it makes the new
32617 logs as "_tor:_tor" rather than the default, which is generally
32618 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
32619 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
32620 warnings (occasionally), but it can also cause the compiler to
32621 eliminate error-checking code. Suggested by Peter Gutmann.
32622 - When a hidden service is giving up on an introduction point candidate
32623 that was not included in the last published rendezvous descriptor,
32624 don't reschedule publication of the next descriptor. Fixes bug 763.
32626 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
32627 HiddenServiceExcludeNodes as obsolete: they never worked properly,
32628 and nobody claims to be using them. Fixes bug 754. Bugfix on
32629 0.1.0.1-rc. Patch from Christian Wilms.
32630 - Fix a small alignment and memory-wasting bug on buffer chunks.
32633 o Minor bugfixes (controller):
32634 - When closing an application-side connection because its circuit
32635 is getting torn down, generate the stream event correctly.
32636 Bugfix on 0.1.2.x. Anonymous patch.
32638 o Removed features:
32639 - Remove all backward-compatibility code to support relays running
32640 versions of Tor so old that they no longer work at all on the
32644 Changes in version 0.2.0.30 - 2008-07-15
32646 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
32647 warnings (occasionally), but it can also cause the compiler to
32648 eliminate error-checking code. Suggested by Peter Gutmann.
32651 Changes in version 0.2.0.29-rc - 2008-07-08
32652 Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
32653 hidden-service performance bugs, and fixes a bunch of smaller bugs.
32656 - If you have more than one bridge but don't know their keys,
32657 you would only launch a request for the descriptor of the first one
32658 on your list. (Tor considered launching requests for the others, but
32659 found that it already had a connection on the way for $0000...0000
32660 so it didn't open another.) Bugfix on 0.2.0.x.
32661 - If you have more than one bridge but don't know their keys, and the
32662 connection to one of the bridges failed, you would cancel all
32663 pending bridge connections. (After all, they all have the same
32664 digest.) Bugfix on 0.2.0.x.
32665 - When a hidden service was trying to establish an introduction point,
32666 and Tor had built circuits preemptively for such purposes, we
32667 were ignoring all the preemptive circuits and launching a new one
32668 instead. Bugfix on 0.2.0.14-alpha.
32669 - When a hidden service was trying to establish an introduction point,
32670 and Tor *did* manage to reuse one of the preemptively built
32671 circuits, it didn't correctly remember which one it used,
32672 so it asked for another one soon after, until there were no
32673 more preemptive circuits, at which point it launched one from
32674 scratch. Bugfix on 0.0.9.x.
32675 - Make directory servers include the X-Your-Address-Is: http header in
32676 their responses even for begin_dir conns. Now clients who only
32677 ever use begin_dir connections still have a way to learn their IP
32678 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
32681 - Fix a macro/CPP interaction that was confusing some compilers:
32682 some GCCs don't like #if/#endif pairs inside macro arguments.
32684 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
32685 Fixes bug 704; fix from Steven Murdoch.
32686 - When opening /dev/null in finish_daemonize(), do not pass the
32687 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
32688 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
32689 - Correctly detect transparent proxy support on Linux hosts that
32690 require in.h to be included before netfilter_ipv4.h. Patch
32692 - Disallow session resumption attempts during the renegotiation
32693 stage of the v2 handshake protocol. Clients should never be trying
32694 session resumption at this point, but apparently some did, in
32695 ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
32696 found by Geoff Goodell.
32699 Changes in version 0.2.1.2-alpha - 2008-06-20
32700 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
32701 make it easier to set up your own private Tor network; fixes several
32702 big bugs with using more than one bridge relay; fixes a big bug with
32703 offering hidden services quickly after Tor starts; and uses a better
32704 API for reporting potential bootstrapping problems to the controller.
32707 - New TestingTorNetwork config option to allow adjustment of
32708 previously constant values that, while reasonable, could slow
32709 bootstrapping. Implements proposal 135. Patch from Karsten.
32712 - If you have more than one bridge but don't know their digests,
32713 you would only learn a request for the descriptor of the first one
32714 on your list. (Tor considered launching requests for the others, but
32715 found that it already had a connection on the way for $0000...0000
32716 so it didn't open another.) Bugfix on 0.2.0.x.
32717 - If you have more than one bridge but don't know their digests,
32718 and the connection to one of the bridges failed, you would cancel
32719 all pending bridge connections. (After all, they all have the
32720 same digest.) Bugfix on 0.2.0.x.
32721 - When establishing a hidden service, introduction points that
32722 originate from cannibalized circuits are completely ignored and not
32723 included in rendezvous service descriptors. This might be another
32724 reason for delay in making a hidden service available. Bugfix
32725 from long ago (0.0.9.x?)
32728 - Allow OpenSSL to use dynamic locks if it wants.
32729 - When building a consensus, do not include routers that are down.
32730 This will cut down 30% to 40% on consensus size. Implements
32732 - In directory authorities' approved-routers files, allow
32733 fingerprints with or without space.
32734 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
32735 controller can query our current bootstrap state in case it attaches
32736 partway through and wants to catch up.
32737 - Send an initial "Starting" bootstrap status event, so we have a
32738 state to start out in.
32741 - Asking for a conditional consensus at .../consensus/<fingerprints>
32742 would crash a dirserver if it did not already have a
32743 consensus. Bugfix on 0.2.1.1-alpha.
32744 - Clean up some macro/CPP interactions: some GCC versions don't like
32745 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
32748 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
32749 - Directory authorities shouldn't complain about bootstrapping
32750 problems just because they do a lot of reachability testing and
32751 some of the connection attempts fail.
32752 - Start sending "count" and "recommendation" key/value pairs in
32753 bootstrap problem status events, so the controller can hear about
32754 problems even before Tor decides they're worth reporting for sure.
32755 - If you're using bridges, generate "bootstrap problem" warnings
32756 as soon as you run out of working bridges, rather than waiting
32757 for ten failures -- which will never happen if you have less than
32759 - If we close our OR connection because there's been a circuit
32760 pending on it for too long, we were telling our bootstrap status
32761 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
32764 Changes in version 0.2.1.1-alpha - 2008-06-13
32765 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
32766 were making the Tor process bloat especially on Linux; makes our TLS
32767 handshake blend in better; sends "bootstrap phase" status events to
32768 the controller, so it can keep the user informed of progress (and
32769 problems) fetching directory information and establishing circuits;
32770 and adds a variety of smaller features.
32773 - More work on making our TLS handshake blend in: modify the list
32774 of ciphers advertised by OpenSSL in client mode to even more
32775 closely resemble a common web browser. We cheat a little so that
32776 we can advertise ciphers that the locally installed OpenSSL doesn't
32778 - Start sending "bootstrap phase" status events to the controller,
32779 so it can keep the user informed of progress fetching directory
32780 information and establishing circuits. Also inform the controller
32781 if we think we're stuck at a particular bootstrap phase. Implements
32783 - Resume using OpenSSL's RAND_poll() for better (and more portable)
32784 cross-platform entropy collection again. We used to use it, then
32785 stopped using it because of a bug that could crash systems that
32786 called RAND_poll when they had a lot of fds open. It looks like the
32787 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
32788 at startup, and to call RAND_poll() when we reseed later only if
32789 we have a non-buggy OpenSSL version.
32792 - When we choose to abandon a new entry guard because we think our
32793 older ones might be better, close any circuits pending on that
32794 new entry guard connection. This fix should make us recover much
32795 faster when our network is down and then comes back. Bugfix on
32796 0.1.2.8-beta; found by lodger.
32798 o Memory fixes and improvements:
32799 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
32800 to avoid unused RAM in buffer chunks and memory pools.
32801 - Speed up parsing and cut down on memory fragmentation by using
32802 stack-style allocations for parsing directory objects. Previously,
32803 this accounted for over 40% of allocations from within Tor's code
32804 on a typical directory cache.
32805 - Use a Bloom filter rather than a digest-based set to track which
32806 descriptors we need to keep around when we're cleaning out old
32807 router descriptors. This speeds up the computation significantly,
32808 and may reduce fragmentation.
32809 - Reduce the default smartlist size from 32 to 16; it turns out that
32810 most smartlists hold around 8-12 elements tops.
32811 - Make dumpstats() log the fullness and size of openssl-internal
32813 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
32814 patch to their OpenSSL, turn it on to save memory on servers. This
32815 patch will (with any luck) get included in a mainline distribution
32817 - Never use OpenSSL compression: it wastes RAM and CPU trying to
32818 compress cells, which are basically all encrypted, compressed,
32822 - Stop reloading the router list from disk for no reason when we
32823 run out of reachable directory mirrors. Once upon a time reloading
32824 it would set the 'is_running' flag back to 1 for them. It hasn't
32825 done that for a long time.
32826 - In very rare situations new hidden service descriptors were
32827 published earlier than 30 seconds after the last change to the
32828 service. (We currently think that a hidden service descriptor
32829 that's been stable for 30 seconds is worth publishing.)
32832 - Allow separate log levels to be configured for different logging
32833 domains. For example, this allows one to log all notices, warnings,
32834 or errors, plus all memory management messages of level debug or
32835 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
32836 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
32837 and stop using a warning that had become unfixably verbose under
32839 - New --hush command-line option similar to --quiet. While --quiet
32840 disables all logging to the console on startup, --hush limits the
32841 output to messages of warning and error severity.
32842 - Servers support a new URL scheme for consensus downloads that
32843 allows the client to specify which authorities are trusted.
32844 The server then only sends the consensus if the client will trust
32845 it. Otherwise a 404 error is sent back. Clients use this
32846 new scheme when the server supports it (meaning it's running
32847 0.2.1.1-alpha or later). Implements proposal 134.
32848 - New configure/torrc options (--enable-geoip-stats,
32849 DirRecordUsageByCountry) to record how many IPs we've served
32850 directory info to in each country code, how many status documents
32851 total we've sent to each country code, and what share of the total
32852 directory requests we should expect to see.
32853 - Use the TLS1 hostname extension to more closely resemble browser
32855 - Lots of new unit tests.
32856 - Add a macro to implement the common pattern of iterating through
32857 two parallel lists in lockstep.
32860 Changes in version 0.2.0.28-rc - 2008-06-13
32861 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
32862 performance bug, and fixes a bunch of smaller bugs.
32865 - Fix a bug where, when we were choosing the 'end stream reason' to
32866 put in our relay end cell that we send to the exit relay, Tor
32867 clients on Windows were sometimes sending the wrong 'reason'. The
32868 anonymity problem is that exit relays may be able to guess whether
32869 the client is running Windows, thus helping partition the anonymity
32870 set. Down the road we should stop sending reasons to exit relays,
32871 or otherwise prevent future versions of this bug.
32874 - While setting up a hidden service, some valid introduction circuits
32875 were overlooked and abandoned. This might be the reason for
32876 the long delay in making a hidden service available. Bugfix on
32880 - Update to the "June 9 2008" ip-to-country file.
32881 - Run 'make test' as part of 'make dist', so we stop releasing so
32882 many development snapshots that fail their unit tests.
32885 - When we're checking if we have enough dir info for each relay
32886 to begin establishing circuits, make sure that we actually have
32887 the descriptor listed in the consensus, not just any descriptor.
32889 - Bridge relays no longer print "xx=0" in their extrainfo document
32890 for every single country code in the geoip db. Bugfix on
32892 - Only warn when we fail to load the geoip file if we were planning to
32893 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
32894 - If we change our MaxAdvertisedBandwidth and then reload torrc,
32895 Tor won't realize it should publish a new relay descriptor. Fixes
32896 bug 688, reported by mfr. Bugfix on 0.1.2.x.
32897 - When we haven't had any application requests lately, don't bother
32898 logging that we have expired a bunch of descriptors. Bugfix
32900 - Make relay cells written on a connection count as non-padding when
32901 tracking how long a connection has been in use. Bugfix on
32902 0.2.0.1-alpha. Spotted by lodger.
32903 - Fix unit tests in 0.2.0.27-rc.
32904 - Fix compile on Windows.
32907 Changes in version 0.2.0.27-rc - 2008-06-03
32908 Tor 0.2.0.27-rc adds a few features we left out of the earlier
32909 release candidates. In particular, we now include an IP-to-country
32910 GeoIP database, so controllers can easily look up what country a
32911 given relay is in, and so bridge relays can give us some sanitized
32912 summaries about which countries are making use of bridges. (See proposal
32913 126-geoip-fetching.txt for details.)
32916 - Include an IP-to-country GeoIP file in the tarball, so bridge
32917 relays can report sanitized summaries of the usage they're seeing.
32920 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
32921 Robert Hogan. Fixes the first part of bug 681.
32922 - Make bridge authorities never serve extrainfo docs.
32923 - Add support to detect Libevent versions in the 1.4.x series
32925 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
32926 - Include a new contrib/tor-exit-notice.html file that exit relay
32927 operators can put on their website to help reduce abuse queries.
32930 - When tunneling an encrypted directory connection, and its first
32931 circuit fails, do not leave it unattached and ask the controller
32932 to deal. Fixes the second part of bug 681.
32933 - Make bridge authorities correctly expire old extrainfo documents
32937 Changes in version 0.2.0.26-rc - 2008-05-13
32938 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
32939 in Debian's OpenSSL packages. All users running any 0.2.0.x version
32940 should upgrade, whether they're running Debian or not.
32942 o Major security fixes:
32943 - Use new V3 directory authority keys on the tor26, gabelmoo, and
32944 moria1 V3 directory authorities. The old keys were generated with
32945 a vulnerable version of Debian's OpenSSL package, and must be
32946 considered compromised. Other authorities' keys were not generated
32947 with an affected version of OpenSSL.
32950 - List authority signatures as "unrecognized" based on DirServer
32951 lines, not on cert cache. Bugfix on 0.2.0.x.
32954 - Add a new V3AuthUseLegacyKey option to make it easier for
32955 authorities to change their identity keys if they have to.
32958 Changes in version 0.2.0.25-rc - 2008-04-23
32959 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
32962 - Remember to initialize threading before initializing logging.
32963 Otherwise, many BSD-family implementations will crash hard on
32964 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
32967 - Authorities correctly free policies on bad servers on
32968 exit. Fixes bug 672. Bugfix on 0.2.0.x.
32971 Changes in version 0.2.0.24-rc - 2008-04-22
32972 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
32973 v3 directory authority, makes relays with dynamic IP addresses and no
32974 DirPort notice more quickly when their IP address changes, fixes a few
32975 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
32977 o New directory authorities:
32978 - Take lefkada out of the list of v3 directory authorities, since
32979 it has been down for months.
32980 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
32984 - Detect address changes more quickly on non-directory mirror
32985 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
32987 o Minor features (security):
32988 - Reject requests for reverse-dns lookup of names that are in
32989 a private address space. Patch from lodger.
32990 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
32993 o Minor bugfixes (crashes):
32994 - Avoid a rare assert that can trigger when Tor doesn't have much
32995 directory information yet and it tries to fetch a v2 hidden
32996 service descriptor. Fixes bug 651, reported by nwf.
32997 - Initialize log mutex before initializing dmalloc. Otherwise,
32998 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
32999 - Use recursive pthread mutexes in order to avoid deadlock when
33000 logging debug-level messages to a controller. Bug spotted by nwf,
33001 bugfix on 0.2.0.16-alpha.
33003 o Minor bugfixes (resource management):
33004 - Keep address policies from leaking memory: start their refcount
33005 at 1, not 2. Bugfix on 0.2.0.16-alpha.
33006 - Free authority certificates on exit, so they don't look like memory
33007 leaks. Bugfix on 0.2.0.19-alpha.
33008 - Free static hashtables for policy maps and for TLS connections on
33009 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
33010 - Avoid allocating extra space when computing consensuses on 64-bit
33011 platforms. Bug spotted by aakova.
33013 o Minor bugfixes (misc):
33014 - Do not read the configuration file when we've only been told to
33015 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
33016 based on patch from Sebastian Hahn.
33017 - Exit relays that are used as a client can now reach themselves
33018 using the .exit notation, rather than just launching an infinite
33019 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
33020 - When attempting to open a logfile fails, tell us why.
33021 - Fix a dumb bug that was preventing us from knowing that we should
33022 preemptively build circuits to handle expected directory requests.
33023 Fixes bug 660. Bugfix on 0.1.2.x.
33024 - Warn less verbosely about clock skew from netinfo cells from
33025 untrusted sources. Fixes bug 663.
33026 - Make controller stream events for DNS requests more consistent,
33027 by adding "new stream" events for DNS requests, and removing
33028 spurious "stream closed" events" for cached reverse resolves.
33029 Patch from mwenge. Fixes bug 646.
33030 - Correctly notify one-hop connections when a circuit build has
33031 failed. Possible fix for bug 669. Found by lodger.
33034 Changes in version 0.2.0.23-rc - 2008-03-24
33035 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
33036 makes bootstrapping faster if the first directory mirror you contact
33037 is down. The bundles also include the new Vidalia 0.1.2 release.
33040 - When a tunneled directory request is made to a directory server
33041 that's down, notice after 30 seconds rather than 120 seconds. Also,
33042 fail any begindir streams that are pending on it, so they can
33043 retry elsewhere. This was causing multi-minute delays on bootstrap.
33046 Changes in version 0.2.0.22-rc - 2008-03-18
33047 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
33048 enables encrypted directory connections by default for non-relays, fixes
33049 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
33050 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
33053 - Enable encrypted directory connections by default for non-relays,
33054 so censor tools that block Tor directory connections based on their
33055 plaintext patterns will no longer work. This means Tor works in
33056 certain censored countries by default again.
33059 - Make sure servers always request certificates from clients during
33060 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
33061 - Do not enter a CPU-eating loop when a connection is closed in
33062 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
33063 diagnosed by lodger; bugfix on 0.2.0.20-rc.
33064 - Fix assertion failure that could occur when a blocked circuit
33065 became unblocked, and it had pending client DNS requests. Bugfix
33066 on 0.2.0.1-alpha. Fixes bug 632.
33068 o Minor bugfixes (on 0.1.2.x):
33069 - Generate "STATUS_SERVER" events rather than misspelled
33070 "STATUS_SEVER" events. Caught by mwenge.
33071 - When counting the number of bytes written on a TLS connection,
33072 look at the BIO actually used for writing to the network, not
33073 at the BIO used (sometimes) to buffer data for the network.
33074 Looking at different BIOs could result in write counts on the
33075 order of ULONG_MAX. Fixes bug 614.
33076 - On Windows, correctly detect errors when listing the contents of
33077 a directory. Fix from lodger.
33079 o Minor bugfixes (on 0.2.0.x):
33080 - Downgrade "sslv3 alert handshake failure" message to INFO.
33081 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
33082 left BandwidthRate and BandwidthBurst at the default, we would be
33083 silently limited by those defaults. Now raise them to match the
33084 RelayBandwidth* values.
33085 - Fix the SVK version detection logic to work correctly on a branch.
33086 - Make --enable-openbsd-malloc work correctly on Linux with alpha
33087 CPUs. Fixes bug 625.
33088 - Logging functions now check that the passed severity is sane.
33089 - Use proper log levels in the testsuite call of
33090 get_interface_address6().
33091 - When using a nonstandard malloc, do not use the platform values for
33092 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
33093 - Make the openbsd malloc code use 8k pages on alpha CPUs and
33095 - Detect mismatched page sizes when using --enable-openbsd-malloc.
33096 - Avoid double-marked-for-close warning when certain kinds of invalid
33097 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
33098 for bug 617. Bugfix on 0.2.0.1-alpha.
33099 - Make sure that the "NULL-means-reject *:*" convention is followed by
33100 all the policy manipulation functions, avoiding some possible crash
33101 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
33102 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
33103 actually works, and doesn't warn about every single reverse lookup.
33104 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
33107 - Only log guard node status when guard node status has changed.
33108 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
33109 make "INFO" 75% less verbose.
33112 Changes in version 0.2.0.21-rc - 2008-03-02
33113 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
33114 makes Tor work well with Vidalia again, fixes a rare assert bug,
33115 and fixes a pair of more minor bugs. The bundles also include Vidalia
33116 0.1.0 and Torbutton 1.1.16.
33119 - The control port should declare that it requires password auth
33120 when HashedControlSessionPassword is set too. Patch from Matt Edman;
33121 bugfix on 0.2.0.20-rc. Fixes bug 615.
33122 - Downgrade assert in connection_buckets_decrement() to a log message.
33123 This may help us solve bug 614, and in any case will make its
33124 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
33125 - We were sometimes miscounting the number of bytes read from the
33126 network, causing our rate limiting to not be followed exactly.
33127 Bugfix on 0.2.0.16-alpha. Reported by lodger.
33130 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
33131 OpenSSL versions should have been working fine. Diagnosis and patch
33132 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
33133 Bugfix on 0.2.0.20-rc.
33136 Changes in version 0.2.0.20-rc - 2008-02-24
33137 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
33138 makes more progress towards normalizing Tor's TLS handshake, makes
33139 hidden services work better again, helps relays bootstrap if they don't
33140 know their IP address, adds optional support for linking in openbsd's
33141 allocator or tcmalloc, allows really fast relays to scale past 15000
33142 sockets, and fixes a bunch of minor bugs reported by Veracode.
33145 - Enable the revised TLS handshake based on the one designed by
33146 Steven Murdoch in proposal 124, as revised in proposal 130. It
33147 includes version negotiation for OR connections as described in
33148 proposal 105. The new handshake is meant to be harder for censors
33149 to fingerprint, and it adds the ability to detect certain kinds of
33150 man-in-the-middle traffic analysis attacks. The version negotiation
33151 feature will allow us to improve Tor's link protocol more safely
33153 - Choose which bridge to use proportional to its advertised bandwidth,
33154 rather than uniformly at random. This should speed up Tor for
33155 bridge users. Also do this for people who set StrictEntryNodes.
33156 - When a TrackHostExits-chosen exit fails too many times in a row,
33157 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
33160 - Resolved problems with (re-)fetching hidden service descriptors.
33161 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
33162 and 0.2.0.19-alpha.
33163 - If we only ever used Tor for hidden service lookups or posts, we
33164 would stop building circuits and start refusing connections after
33165 24 hours, since we falsely believed that Tor was dormant. Reported
33166 by nwf; bugfix on 0.1.2.x.
33167 - Servers that don't know their own IP address should go to the
33168 authorities for their first directory fetch, even if their DirPort
33169 is off or if they don't know they're reachable yet. This will help
33170 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
33171 - When counting the number of open sockets, count not only the number
33172 of sockets we have received from the socket() call, but also
33173 the number we've gotten from accept() and socketpair(). This bug
33174 made us fail to count all sockets that we were using for incoming
33175 connections. Bugfix on 0.2.0.x.
33176 - Fix code used to find strings within buffers, when those strings
33177 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
33178 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
33179 - Add a new __HashedControlSessionPassword option for controllers
33180 to use for one-off session password hashes that shouldn't get
33181 saved to disk by SAVECONF --- Vidalia users were accumulating a
33182 pile of HashedControlPassword lines in their torrc files, one for
33183 each time they had restarted Tor and then clicked Save. Make Tor
33184 automatically convert "HashedControlPassword" to this new option but
33185 only when it's given on the command line. Partial fix for bug 586.
33187 o Minor features (performance):
33188 - Tune parameters for cell pool allocation to minimize amount of
33190 - Add OpenBSD malloc code from phk as an optional malloc
33191 replacement on Linux: some glibc libraries do very poorly
33192 with Tor's memory allocation patterns. Pass
33193 --enable-openbsd-malloc to get the replacement malloc code.
33194 - Add a --with-tcmalloc option to the configure script to link
33195 against tcmalloc (if present). Does not yet search for
33196 non-system include paths.
33197 - Stop imposing an arbitrary maximum on the number of file descriptors
33198 used for busy servers. Bug reported by Olaf Selke; patch from
33201 o Minor features (other):
33202 - When SafeLogging is disabled, log addresses along with all TLS
33204 - When building with --enable-gcc-warnings, check for whether Apple's
33205 warning "-Wshorten-64-to-32" is available.
33206 - Add a --passphrase-fd argument to the tor-gencert command for
33209 o Minor bugfixes (memory leaks and code problems):
33210 - We were leaking a file descriptor if Tor started with a zero-length
33211 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
33212 - Detect size overflow in zlib code. Reported by Justin Ferguson and
33214 - We were comparing the raw BridgePassword entry with a base64'ed
33215 version of it, when handling a "/tor/networkstatus-bridges"
33216 directory request. Now compare correctly. Noticed by Veracode.
33217 - Recover from bad tracked-since value in MTBF-history file.
33218 Should fix bug 537.
33219 - Alter the code that tries to recover from unhandled write
33220 errors, to not try to flush onto a socket that's given us
33221 unhandled errors. Bugfix on 0.1.2.x.
33222 - Make Unix controlsockets work correctly on OpenBSD. Patch from
33223 tup. Bugfix on 0.2.0.3-alpha.
33225 o Minor bugfixes (other):
33226 - If we have an extra-info document for our server, always make
33227 it available on the control port, even if we haven't gotten
33228 a copy of it from an authority yet. Patch from mwenge.
33229 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
33230 - Directory mirrors no longer include a guess at the client's IP
33231 address if the connection appears to be coming from the same /24
33232 network; it was producing too many wrong guesses.
33233 - Make the new hidden service code respect the SafeLogging setting.
33234 Bugfix on 0.2.0.x. Patch from Karsten.
33235 - When starting as an authority, do not overwrite all certificates
33236 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
33237 - If we're trying to flush the last bytes on a connection (for
33238 example, when answering a directory request), reset the
33239 time-to-give-up timeout every time we manage to write something
33240 on the socket. Bugfix on 0.1.2.x.
33241 - Change the behavior of "getinfo status/good-server-descriptor"
33242 so it doesn't return failure when any authority disappears.
33243 - Even though the man page said that "TrackHostExits ." should
33244 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
33245 - Report TLS "zero return" case as a "clean close" and "IO error"
33246 as a "close". Stop calling closes "unexpected closes": existing
33247 Tors don't use SSL_close(), so having a connection close without
33248 the TLS shutdown handshake is hardly unexpected.
33249 - Send NAMESERVER_STATUS messages for a single failed nameserver
33252 o Code simplifications and refactoring:
33253 - Remove the tor_strpartition function: its logic was confused,
33254 and it was only used for one thing that could be implemented far
33258 Changes in version 0.2.0.19-alpha - 2008-02-09
33259 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
33260 handshake, makes path selection for relays more secure and IP address
33261 guessing more robust, and generally fixes a lot of bugs in preparation
33262 for calling the 0.2.0 branch stable.
33265 - Do not include recognizeable strings in the commonname part of
33266 Tor's x509 certificates.
33269 - If we're a relay, avoid picking ourselves as an introduction point,
33270 a rendezvous point, or as the final hop for internal circuits. Bug
33271 reported by taranis and lodger. Bugfix on 0.1.2.x.
33272 - Patch from "Andrew S. Lists" to catch when we contact a directory
33273 mirror at IP address X and he says we look like we're coming from
33274 IP address X. Bugfix on 0.1.2.x.
33276 o Minor features (security):
33277 - Be more paranoid about overwriting sensitive memory on free(),
33278 as a defensive programming tactic to ensure forward secrecy.
33280 o Minor features (directory authority):
33281 - Actually validate the options passed to AuthDirReject,
33282 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
33283 - Reject router descriptors with out-of-range bandwidthcapacity or
33284 bandwidthburst values.
33286 o Minor features (controller):
33287 - Reject controller commands over 1MB in length. This keeps rogue
33288 processes from running us out of memory.
33290 o Minor features (misc):
33291 - Give more descriptive well-formedness errors for out-of-range
33292 hidden service descriptor/protocol versions.
33293 - Make memory debugging information describe more about history
33294 of cell allocation, so we can help reduce our memory use.
33296 o Deprecated features (controller):
33297 - The status/version/num-versioning and status/version/num-concurring
33298 GETINFO options are no longer useful in the v3 directory protocol:
33299 treat them as deprecated, and warn when they're used.
33302 - When our consensus networkstatus has been expired for a while, stop
33303 being willing to build circuits using it. Fixes bug 401. Bugfix
33305 - Directory caches now fetch certificates from all authorities
33306 listed in a networkstatus consensus, even when they do not
33307 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
33308 - When connecting to a bridge without specifying its key, insert
33309 the connection into the identity-to-connection map as soon as
33310 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
33311 - Detect versions of OS X where malloc_good_size() is present in the
33312 library but never actually declared. Resolves bug 587. Bugfix
33314 - Stop incorrectly truncating zlib responses to directory authority
33315 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
33316 - Stop recommending that every server operator send mail to tor-ops.
33317 Resolves bug 597. Bugfix on 0.1.2.x.
33318 - Don't trigger an assert if we start a directory authority with a
33319 private IP address (like 127.0.0.1).
33320 - Avoid possible failures when generating a directory with routers
33321 with over-long versions strings, or too many flags set. Bugfix
33323 - If an attempt to launch a DNS resolve request over the control
33324 port fails because we have overrun the limit on the number of
33325 connections, tell the controller that the request has failed.
33326 - Avoid using too little bandwidth when our clock skips a few
33327 seconds. Bugfix on 0.1.2.x.
33328 - Fix shell error when warning about missing packages in configure
33329 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
33330 - Do not become confused when receiving a spurious VERSIONS-like
33331 cell from a confused v1 client. Bugfix on 0.2.0.x.
33332 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
33333 introduction points for a hidden service have failed. Patch from
33334 Karsten Loesing. Bugfix on 0.2.0.x.
33336 o Code simplifications and refactoring:
33337 - Remove some needless generality from cpuworker code, for improved
33339 - Stop overloading the circuit_t.onionskin field for both "onionskin
33340 from a CREATE cell that we are waiting for a cpuworker to be
33341 assigned" and "onionskin from an EXTEND cell that we are going to
33342 send to an OR as soon as we are connected". Might help with bug 600.
33343 - Add an in-place version of aes_crypt() so that we can avoid doing a
33344 needless memcpy() call on each cell payload.
33347 Changes in version 0.2.0.18-alpha - 2008-01-25
33348 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
33349 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
33350 that can warn or reject connections to ports generally associated with
33351 vulnerable-plaintext protocols.
33353 o New directory authorities:
33354 - Set up dannenberg (run by CCC) as the sixth v3 directory
33358 - Fix a major memory leak when attempting to use the v2 TLS
33359 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
33360 - We accidentally enabled the under-development v2 TLS handshake
33361 code, which was causing log entries like "TLS error while
33362 renegotiating handshake". Disable it again. Resolves bug 590.
33363 - We were computing the wrong Content-Length: header for directory
33364 responses that need to be compressed on the fly, causing clients
33365 asking for those items to always fail. Bugfix on 0.2.0.x; partially
33369 - Avoid going directly to the directory authorities even if you're a
33370 relay, if you haven't found yourself reachable yet or if you've
33371 decided not to advertise your dirport yet. Addresses bug 556.
33372 - If we've gone 12 hours since our last bandwidth check, and we
33373 estimate we have less than 50KB bandwidth capacity but we could
33374 handle more, do another bandwidth test.
33375 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
33376 Tor can warn and/or refuse connections to ports commonly used with
33377 vulnerable-plaintext protocols. Currently we warn on ports 23,
33378 109, 110, and 143, but we don't reject any.
33381 - When we setconf ClientOnly to 1, close any current OR and Dir
33382 listeners. Reported by mwenge.
33383 - When we get a consensus that's been signed by more people than
33384 we expect, don't log about it; it's not a big deal. Reported
33388 - Don't answer "/tor/networkstatus-bridges" directory requests if
33389 the request isn't encrypted.
33390 - Make "ClientOnly 1" config option disable directory ports too.
33391 - Patches from Karsten Loesing to make v2 hidden services more
33392 robust: work even when there aren't enough HSDir relays available;
33393 retry when a v2 rend desc fetch fails; but don't retry if we
33394 already have a usable v0 rend desc.
33397 Changes in version 0.2.0.17-alpha - 2008-01-17
33398 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
33401 - Make the tor-gencert man page get included correctly in the tarball.
33404 Changes in version 0.2.0.16-alpha - 2008-01-17
33405 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
33406 Loesing, and generally cleans up a lot of features and minor bugs.
33408 o New directory authorities:
33409 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
33412 o Major performance improvements:
33413 - Switch our old ring buffer implementation for one more like that
33414 used by free Unix kernels. The wasted space in a buffer with 1mb
33415 of data will now be more like 8k than 1mb. The new implementation
33416 also avoids realloc();realloc(); patterns that can contribute to
33417 memory fragmentation.
33420 - Configuration files now accept C-style strings as values. This
33421 helps encode characters not allowed in the current configuration
33422 file format, such as newline or #. Addresses bug 557.
33423 - Although we fixed bug 539 (where servers would send HTTP status 503
33424 responses _and_ send a body too), there are still servers out
33425 there that haven't upgraded. Therefore, make clients parse such
33426 bodies when they receive them.
33427 - When we're not serving v2 directory information, there is no reason
33428 to actually keep any around. Remove the obsolete files and directory
33429 on startup if they are very old and we aren't going to serve them.
33431 o Minor performance improvements:
33432 - Reference-count and share copies of address policy entries; only 5%
33433 of them were actually distinct.
33434 - Never walk through the list of logs if we know that no log is
33435 interested in a given message.
33438 - When an authority has not signed a consensus, do not try to
33439 download a nonexistent "certificate with key 00000000". Bugfix
33440 on 0.2.0.x. Fixes bug 569.
33441 - Fix a rare assert error when we're closing one of our threads:
33442 use a mutex to protect the list of logs, so we never write to the
33443 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
33444 bug 575, which is kind of the revenge of bug 222.
33445 - Patch from Karsten Loesing to complain less at both the client
33446 and the relay when a relay used to have the HSDir flag but doesn't
33447 anymore, and we try to upload a hidden service descriptor.
33448 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
33450 - Do not try to download missing certificates until we have tried
33451 to check our fallback consensus. Fixes bug 583.
33452 - Make bridges round reported GeoIP stats info up to the nearest
33453 estimate, not down. Now we can distinguish between "0 people from
33454 this country" and "1 person from this country".
33455 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
33456 - Avoid possible segfault if key generation fails in
33457 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
33458 - Avoid segfault in the case where a badly behaved v2 versioning
33459 directory sends a signed networkstatus with missing client-versions.
33461 - Avoid segfaults on certain complex invocations of
33462 router_get_by_hexdigest(). Bugfix on 0.1.2.
33463 - Correct bad index on array access in parse_http_time(). Bugfix
33465 - Fix possible bug in vote generation when server versions are present
33466 but client versions are not.
33467 - Fix rare bug on REDIRECTSTREAM control command when called with no
33468 port set: it could erroneously report an error when none had
33470 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
33471 compressing large objects and find ourselves with more than 4k
33472 left over. Bugfix on 0.2.0.
33473 - Fix a small memory leak when setting up a hidden service.
33474 - Fix a few memory leaks that could in theory happen under bizarre
33476 - Fix an assert if we post a general-purpose descriptor via the
33477 control port but that descriptor isn't mentioned in our current
33478 network consensus. Bug reported by Jon McLachlan; bugfix on
33481 o Minor features (controller):
33482 - Get NS events working again. Patch from tup.
33483 - The GETCONF command now escapes and quotes configuration values
33484 that don't otherwise fit into the torrc file.
33485 - The SETCONF command now handles quoted values correctly.
33487 o Minor features (directory authorities):
33488 - New configuration options to override default maximum number of
33489 servers allowed on a single IP address. This is important for
33490 running a test network on a single host.
33491 - Actually implement the -s option to tor-gencert.
33492 - Add a manual page for tor-gencert.
33494 o Minor features (bridges):
33495 - Bridge authorities no longer serve bridge descriptors over
33496 unencrypted connections.
33498 o Minor features (other):
33499 - Add hidden services and DNSPorts to the list of things that make
33500 Tor accept that it has running ports. Change starting Tor with no
33501 ports from a fatal error to a warning; we might change it back if
33502 this turns out to confuse anybody. Fixes bug 579.
33505 Changes in version 0.1.2.19 - 2008-01-17
33506 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
33507 exit policy a little bit more conservative so it's safer to run an
33508 exit relay on a home system, and fixes a variety of smaller issues.
33511 - Exit policies now reject connections that are addressed to a
33512 relay's public (external) IP address too, unless
33513 ExitPolicyRejectPrivate is turned off. We do this because too
33514 many relays are running nearby to services that trust them based
33515 on network address.
33518 - When the clock jumps forward a lot, do not allow the bandwidth
33519 buckets to become negative. Fixes bug 544.
33520 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
33521 on every successful resolve. Reported by Mike Perry.
33522 - Purge old entries from the "rephist" database and the hidden
33523 service descriptor database even when DirPort is zero.
33524 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
33525 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
33526 crashing or mis-answering these requests.
33527 - When we decide to send a 503 response to a request for servers, do
33528 not then also send the server descriptors: this defeats the whole
33529 purpose. Fixes bug 539.
33532 - Changing the ExitPolicyRejectPrivate setting should cause us to
33533 rebuild our server descriptor.
33534 - Fix handling of hex nicknames when answering controller requests for
33535 networkstatus by name, or when deciding whether to warn about
33536 unknown routers in a config option. (Patch from mwenge.)
33537 - Fix a couple of hard-to-trigger autoconf problems that could result
33538 in really weird results on platforms whose sys/types.h files define
33539 nonstandard integer types.
33540 - Don't try to create the datadir when running --verify-config or
33541 --hash-password. Resolves bug 540.
33542 - If we were having problems getting a particular descriptor from the
33543 directory caches, and then we learned about a new descriptor for
33544 that router, we weren't resetting our failure count. Reported
33546 - Although we fixed bug 539 (where servers would send HTTP status 503
33547 responses _and_ send a body too), there are still servers out there
33548 that haven't upgraded. Therefore, make clients parse such bodies
33549 when they receive them.
33550 - Run correctly on systems where rlim_t is larger than unsigned long.
33551 This includes some 64-bit systems.
33552 - Run correctly on platforms (like some versions of OS X 10.5) where
33553 the real limit for number of open files is OPEN_FILES, not rlim_max
33554 from getrlimit(RLIMIT_NOFILES).
33555 - Avoid a spurious free on base64 failure.
33556 - Avoid segfaults on certain complex invocations of
33557 router_get_by_hexdigest().
33558 - Fix rare bug on REDIRECTSTREAM control command when called with no
33559 port set: it could erroneously report an error when none had
33563 Changes in version 0.2.0.15-alpha - 2007-12-25
33564 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
33565 features added in 0.2.0.13-alpha.
33568 - Fix several remotely triggerable asserts based on DirPort requests
33569 for a v2 or v3 networkstatus object before we were prepared. This
33570 was particularly bad for 0.2.0.13 and later bridge relays, who
33571 would never have a v2 networkstatus and would thus always crash
33572 when used. Bugfixes on 0.2.0.x.
33573 - Estimate the v3 networkstatus size more accurately, rather than
33574 estimating it at zero bytes and giving it artificially high priority
33575 compared to other directory requests. Bugfix on 0.2.0.x.
33578 - Fix configure.in logic for cross-compilation.
33579 - When we load a bridge descriptor from the cache, and it was
33580 previously unreachable, mark it as retriable so we won't just
33581 ignore it. Also, try fetching a new copy immediately. Bugfixes
33583 - The bridge GeoIP stats were counting other relays, for example
33584 self-reachability and authority-reachability tests.
33587 - Support compilation to target iPhone; patch from cjacker huang.
33588 To build for iPhone, pass the --enable-iphone option to configure.
33591 Changes in version 0.2.0.14-alpha - 2007-12-23
33593 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
33594 without a datadirectory from a previous Tor install. Reported
33596 - Fix a crash when we fetch a descriptor that turns out to be
33597 unexpected (it used to be in our networkstatus when we started
33598 fetching it, but it isn't in our current networkstatus), and we
33599 aren't using bridges. Bugfix on 0.2.0.x.
33600 - Fix a crash when accessing hidden services: it would work the first
33601 time you use a given introduction point for your service, but
33602 on subsequent requests we'd be using garbage memory. Fixed by
33603 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
33604 - Fix a crash when we load a bridge descriptor from disk but we don't
33605 currently have a Bridge line for it in our torrc. Bugfix on
33609 - If bridge authorities set BridgePassword, they will serve a
33610 snapshot of known bridge routerstatuses from their DirPort to
33611 anybody who knows that password. Unset by default.
33614 - Make the unit tests build again.
33615 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
33616 - Make PublishServerDescriptor default to 1, so the default doesn't
33617 have to change as we invent new directory protocol versions.
33618 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
33619 be included unless sys/time.h is already included. Fixes
33620 bug 553. Bugfix on 0.2.0.x.
33621 - If we receive a general-purpose descriptor and then receive an
33622 identical bridge-purpose descriptor soon after, don't discard
33623 the next one as a duplicate.
33626 - If BridgeRelay is set to 1, then the default for
33627 PublishServerDescriptor is now "bridge" rather than "v2,v3".
33628 - If the user sets RelayBandwidthRate but doesn't set
33629 RelayBandwidthBurst, then make them equal rather than erroring out.
33632 Changes in version 0.2.0.13-alpha - 2007-12-21
33633 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
33634 Goodell, fixes many more bugs, and adds a lot of infrastructure for
33637 o New directory authorities:
33638 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
33642 - Only update guard status (usable / not usable) once we have
33643 enough directory information. This was causing us to always pick
33644 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
33645 causing us to discard all our guards on startup if we hadn't been
33646 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
33647 - Purge old entries from the "rephist" database and the hidden
33648 service descriptor databases even when DirPort is zero. Bugfix
33650 - We were ignoring our RelayBandwidthRate for the first 30 seconds
33651 after opening a circuit -- even a relayed circuit. Bugfix on
33653 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
33654 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
33655 crashing or mis-answering these types of requests.
33656 - Relays were publishing their server descriptor to v1 and v2
33657 directory authorities, but they didn't try publishing to v3-only
33658 authorities. Fix this; and also stop publishing to v1 authorities.
33660 - When we were reading router descriptors from cache, we were ignoring
33661 the annotations -- so for example we were reading in bridge-purpose
33662 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
33663 - When we decided to send a 503 response to a request for servers, we
33664 were then also sending the server descriptors: this defeats the
33665 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
33668 - Bridge relays now behave like clients with respect to time
33669 intervals for downloading new consensus documents -- otherwise they
33670 stand out. Bridge users now wait until the end of the interval,
33671 so their bridge relay will be sure to have a new consensus document.
33672 - Three new config options (AlternateDirAuthority,
33673 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
33674 user selectively replace the default directory authorities by type,
33675 rather than the all-or-nothing replacement that DirServer offers.
33676 - Tor can now be configured to read a GeoIP file from disk in one
33677 of two formats. This can be used by controllers to map IP addresses
33678 to countries. Eventually, it may support exit-by-country.
33679 - When possible, bridge relays remember which countries users
33680 are coming from, and report aggregate information in their
33681 extra-info documents, so that the bridge authorities can learn
33682 where Tor is blocked.
33683 - Bridge directory authorities now do reachability testing on the
33684 bridges they know. They provide router status summaries to the
33685 controller via "getinfo ns/purpose/bridge", and also dump summaries
33686 to a file periodically.
33687 - Stop fetching directory info so aggressively if your DirPort is
33688 on but your ORPort is off; stop fetching v2 dir info entirely.
33689 You can override these choices with the new FetchDirInfoEarly
33693 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
33694 consensus documents when there are too many relays at a single
33695 IP address. Now clear it in v2 network status documents too, and
33696 also clear it in routerinfo_t when the relay is no longer listed
33697 in the relevant networkstatus document.
33698 - Don't crash if we get an unexpected value for the
33699 PublishServerDescriptor config option. Reported by Matt Edman;
33700 bugfix on 0.2.0.9-alpha.
33701 - Our new v2 hidden service descriptor format allows descriptors
33702 that have no introduction points. But Tor crashed when we tried
33703 to build a descriptor with no intro points (and it would have
33704 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
33705 by Karsten Loesing.
33706 - Fix building with dmalloc 5.5.2 with glibc.
33707 - Reject uploaded descriptors and extrainfo documents if they're
33708 huge. Otherwise we'll cache them all over the network and it'll
33709 clog everything up. Reported by Aljosha Judmayer.
33710 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
33711 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
33712 - When the DANGEROUS_VERSION controller status event told us we're
33713 running an obsolete version, it used the string "OLD" to describe
33714 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
33715 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
33716 - If we can't expand our list of entry guards (e.g. because we're
33717 using bridges or we have StrictEntryNodes set), don't mark relays
33718 down when they fail a directory request. Otherwise we're too quick
33719 to mark all our entry points down. Bugfix on 0.1.2.x.
33720 - Fix handling of hex nicknames when answering controller requests for
33721 networkstatus by name, or when deciding whether to warn about unknown
33722 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
33723 - Fix a couple of hard-to-trigger autoconf problems that could result
33724 in really weird results on platforms whose sys/types.h files define
33725 nonstandard integer types. Bugfix on 0.1.2.x.
33726 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
33727 - Don't crash on name lookup when we have no current consensus. Fixes
33728 bug 538; bugfix on 0.2.0.x.
33729 - Only Tors that want to mirror the v2 directory info should
33730 create the "cached-status" directory in their datadir. (All Tors
33731 used to create it.) Bugfix on 0.2.0.9-alpha.
33732 - Directory authorities should only automatically download Extra Info
33733 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
33736 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
33737 consumers. (We already do this on HUP.)
33738 - Authorities and caches fetch the v2 networkstatus documents
33739 less often, now that v3 is encouraged.
33740 - Add a new config option BridgeRelay that specifies you want to
33741 be a bridge relay. Right now the only difference is that it makes
33742 you answer begin_dir requests, and it makes you cache dir info,
33743 even if your DirPort isn't on.
33744 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
33745 ask about source, timestamp of arrival, purpose, etc. We need
33746 something like this to help Vidalia not do GeoIP lookups on bridge
33748 - Allow multiple HashedControlPassword config lines, to support
33749 multiple controller passwords.
33750 - Authorities now decide whether they're authoritative for a given
33751 router based on the router's purpose.
33752 - New config options AuthDirBadDir and AuthDirListBadDirs for
33753 authorities to mark certain relays as "bad directories" in the
33754 networkstatus documents. Also supports the "!baddir" directive in
33755 the approved-routers file.
33758 Changes in version 0.2.0.12-alpha - 2007-11-16
33759 This twelfth development snapshot fixes some more build problems as
33760 well as a few minor bugs.
33763 - Make it build on OpenBSD again. Patch from tup.
33764 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
33765 package-building for Red Hat, OS X, etc.
33767 o Minor bugfixes (on 0.1.2.x):
33768 - Changing the ExitPolicyRejectPrivate setting should cause us to
33769 rebuild our server descriptor.
33771 o Minor bugfixes (on 0.2.0.x):
33772 - When we're lacking a consensus, don't try to perform rendezvous
33773 operations. Reported by Karsten Loesing.
33774 - Fix a small memory leak whenever we decide against using a
33775 newly picked entry guard. Reported by Mike Perry.
33776 - When authorities detected more than two relays running on the same
33777 IP address, they were clearing all the status flags but forgetting
33778 to clear the "hsdir" flag. So clients were being told that a
33779 given relay was the right choice for a v2 hsdir lookup, yet they
33780 never had its descriptor because it was marked as 'not running'
33782 - If we're trying to fetch a bridge descriptor and there's no way
33783 the bridge authority could help us (for example, we don't know
33784 a digest, or there is no bridge authority), don't be so eager to
33785 fall back to asking the bridge authority.
33786 - If we're using bridges or have strictentrynodes set, and our
33787 chosen exit is in the same family as all our bridges/entry guards,
33788 then be flexible about families.
33791 - When we negotiate a v2 link-layer connection (not yet implemented),
33792 accept RELAY_EARLY cells and turn them into RELAY cells if we've
33793 negotiated a v1 connection for their next step. Initial code for
33797 Changes in version 0.2.0.11-alpha - 2007-11-12
33798 This eleventh development snapshot fixes some build problems with
33799 the previous snapshot. It also includes a more secure-by-default exit
33800 policy for relays, fixes an enormous memory leak for exit relays, and
33801 fixes another bug where servers were falling out of the directory list.
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. Bugfix on 0.1.2.x.
33811 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
33812 on every successful resolve. Reported by Mike Perry; bugfix
33814 - On authorities, never downgrade to old router descriptors simply
33815 because they're listed in the consensus. This created a catch-22
33816 where we wouldn't list a new descriptor because there was an
33817 old one in the consensus, and we couldn't get the new one in the
33818 consensus because we wouldn't list it. Possible fix for bug 548.
33819 Also, this might cause bug 543 to appear on authorities; if so,
33820 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
33822 o Packaging fixes on 0.2.0.10-alpha:
33823 - We were including instructions about what to do with the
33824 src/config/fallback-consensus file, but we weren't actually
33825 including it in the tarball. Disable all of that for now.
33828 - Allow people to say PreferTunnelledDirConns rather than
33829 PreferTunneledDirConns, for those alternate-spellers out there.
33832 - Don't reevaluate all the information from our consensus document
33833 just because we've downloaded a v2 networkstatus that we intend
33834 to cache. Fixes bug 545; bugfix on 0.2.0.x.
33837 Changes in version 0.2.0.10-alpha - 2007-11-10
33838 This tenth development snapshot adds a third v3 directory authority
33839 run by Mike Perry, adds most of Karsten Loesing's new hidden service
33840 descriptor format, fixes a bad crash bug and new bridge bugs introduced
33841 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
33842 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
33843 addresses many more minor issues.
33845 o New directory authorities:
33846 - Set up ides (run by Mike Perry) as the third v3 directory authority.
33849 - Allow tunnelled directory connections to ask for an encrypted
33850 "begin_dir" connection or an anonymized "uses a full Tor circuit"
33851 connection independently. Now we can make anonymized begin_dir
33852 connections for (e.g.) more secure hidden service posting and
33854 - More progress on proposal 114: code from Karsten Loesing to
33855 implement new hidden service descriptor format.
33856 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
33857 accommodate the growing number of servers that use the default
33858 and are reaching it.
33859 - Directory authorities use a new formula for selecting which nodes
33860 to advertise as Guards: they must be in the top 7/8 in terms of
33861 how long we have known about them, and above the median of those
33862 nodes in terms of weighted fractional uptime.
33863 - Make "not enough dir info yet" warnings describe *why* Tor feels
33864 it doesn't have enough directory info yet.
33867 - Stop servers from crashing if they set a Family option (or
33868 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
33870 - Make bridge users work again -- the move to v3 directories in
33871 0.2.0.9-alpha had introduced a number of bugs that made bridges
33872 no longer work for clients.
33873 - When the clock jumps forward a lot, do not allow the bandwidth
33874 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
33876 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
33877 - When the consensus lists a router descriptor that we previously were
33878 mirroring, but that we considered non-canonical, reload the
33879 descriptor as canonical. This fixes bug 543 where Tor servers
33880 would start complaining after a few days that they don't have
33881 enough directory information to build a circuit.
33882 - Consider replacing the current consensus when certificates arrive
33883 that make the pending consensus valid. Previously, we were only
33884 considering replacement when the new certs _didn't_ help.
33885 - Fix an assert error on startup if we didn't already have the
33886 consensus and certs cached in our datadirectory: we were caching
33887 the consensus in consensus_waiting_for_certs but then free'ing it
33889 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
33890 Request) if we need more v3 certs but we've already got pending
33891 requests for all of them.
33892 - Correctly back off from failing certificate downloads. Fixes
33894 - Authorities don't vote on the Running flag if they have been running
33895 for less than 30 minutes themselves. Fixes bug 547, where a newly
33896 started authority would vote that everyone was down.
33898 o New requirements:
33899 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
33900 it, it had no AES, and it hasn't seen any security patches since
33904 - Clients now hold circuitless TLS connections open for 1.5 times
33905 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
33906 rebuild a new circuit over them within that timeframe. Previously,
33907 they held them open only for KeepalivePeriod (5 minutes).
33908 - Use "If-Modified-Since" to avoid retrieving consensus
33909 networkstatuses that we already have.
33910 - When we have no consensus, check FallbackNetworkstatusFile (defaults
33911 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
33912 we start knowing some directory caches.
33913 - When we receive a consensus from the future, warn about skew.
33914 - Improve skew reporting: try to give the user a better log message
33915 about how skewed they are, and how much this matters.
33916 - When we have a certificate for an authority, believe that
33917 certificate's claims about the authority's IP address.
33918 - New --quiet command-line option to suppress the default console log.
33919 Good in combination with --hash-password.
33920 - Authorities send back an X-Descriptor-Not-New header in response to
33921 an accepted-but-discarded descriptor upload. Partially implements
33923 - Make the log message for "tls error. breaking." more useful.
33924 - Better log messages about certificate downloads, to attempt to
33925 track down the second incarnation of bug 546.
33927 o Minor features (bridges):
33928 - If bridge users set UpdateBridgesFromAuthority, but the digest
33929 they ask for is a 404 from the bridge authority, they now fall
33930 back to trying the bridge directly.
33931 - Bridges now use begin_dir to publish their server descriptor to
33932 the bridge authority, even when they haven't set TunnelDirConns.
33934 o Minor features (controller):
33935 - When reporting clock skew, and we know that the clock is _at least
33936 as skewed_ as some value, but we don't know the actual value,
33937 report the value as a "minimum skew."
33940 - Update linux-tor-prio.sh script to allow QoS based on the uid of
33941 the Tor process. Patch from Marco Bonetti with tweaks from Mike
33945 - Refuse to start if both ORPort and UseBridges are set. Bugfix
33946 on 0.2.0.x, suggested by Matt Edman.
33947 - Don't stop fetching descriptors when FetchUselessDescriptors is
33948 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
33949 reported by tup and ioerror.
33950 - Better log message on vote from unknown authority.
33951 - Don't log "Launching 0 request for 0 router" message.
33953 o Minor bugfixes (memory leaks):
33954 - Stop leaking memory every time we parse a v3 certificate. Bugfix
33956 - Stop leaking memory every time we load a v3 certificate. Bugfix
33957 on 0.2.0.1-alpha. Fixes bug 536.
33958 - Stop leaking a cached networkstatus on exit. Bugfix on
33960 - Stop leaking voter information every time we free a consensus.
33961 Bugfix on 0.2.0.3-alpha.
33962 - Stop leaking signed data every time we check a voter signature.
33963 Bugfix on 0.2.0.3-alpha.
33964 - Stop leaking a signature every time we fail to parse a consensus or
33965 a vote. Bugfix on 0.2.0.3-alpha.
33966 - Stop leaking v2_download_status_map on shutdown. Bugfix on
33968 - Stop leaking conn->nickname every time we make a connection to a
33969 Tor relay without knowing its expected identity digest (e.g. when
33970 using bridges). Bugfix on 0.2.0.3-alpha.
33972 - Minor bugfixes (portability):
33973 - Run correctly on platforms where rlim_t is larger than unsigned
33974 long, and/or where the real limit for number of open files is
33975 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
33976 particular, these may be needed for OS X 10.5.
33979 Changes in version 0.1.2.18 - 2007-10-28
33980 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
33981 hidden service introduction that were causing huge delays, and a big
33982 bug that was causing some servers to disappear from the network status
33983 lists for a few hours each day.
33985 o Major bugfixes (crashes):
33986 - If a connection is shut down abruptly because of something that
33987 happened inside connection_flushed_some(), do not call
33988 connection_finished_flushing(). Should fix bug 451:
33989 "connection_stop_writing: Assertion conn->write_event failed"
33990 Bugfix on 0.1.2.7-alpha.
33991 - Fix possible segfaults in functions called from
33992 rend_process_relay_cell().
33994 o Major bugfixes (hidden services):
33995 - Hidden services were choosing introduction points uniquely by
33996 hexdigest, but when constructing the hidden service descriptor
33997 they merely wrote the (potentially ambiguous) nickname.
33998 - Clients now use the v2 intro format for hidden service
33999 connections: they specify their chosen rendezvous point by identity
34000 digest rather than by (potentially ambiguous) nickname. These
34001 changes could speed up hidden service connections dramatically.
34003 o Major bugfixes (other):
34004 - Stop publishing a new server descriptor just because we get a
34005 HUP signal. This led (in a roundabout way) to some servers getting
34006 dropped from the networkstatus lists for a few hours each day.
34007 - When looking for a circuit to cannibalize, consider family as well
34008 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
34009 circuit cannibalization).
34010 - When a router wasn't listed in a new networkstatus, we were leaving
34011 the flags for that router alone -- meaning it remained Named,
34012 Running, etc -- even though absence from the networkstatus means
34013 that it shouldn't be considered to exist at all anymore. Now we
34014 clear all the flags for routers that fall out of the networkstatus
34015 consensus. Fixes bug 529.
34018 - Don't try to access (or alter) the state file when running
34019 --list-fingerprint or --verify-config or --hash-password. Resolves
34021 - When generating information telling us how to extend to a given
34022 router, do not try to include the nickname if it is
34023 absent. Resolves bug 467.
34024 - Fix a user-triggerable segfault in expand_filename(). (There isn't
34025 a way to trigger this remotely.)
34026 - When sending a status event to the controller telling it that an
34027 OR address is reachable, set the port correctly. (Previously we
34028 were reporting the dir port.)
34029 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
34030 command. Bugfix on 0.1.2.17.
34031 - When loading bandwidth history, do not believe any information in
34032 the future. Fixes bug 434.
34033 - When loading entry guard information, do not believe any information
34035 - When we have our clock set far in the future and generate an
34036 onion key, then re-set our clock to be correct, we should not stop
34037 the onion key from getting rotated.
34038 - On some platforms, accept() can return a broken address. Detect
34039 this more quietly, and deal accordingly. Fixes bug 483.
34040 - It's not actually an error to find a non-pending entry in the DNS
34041 cache when canceling a pending resolve. Don't log unless stuff
34042 is fishy. Resolves bug 463.
34043 - Don't reset trusted dir server list when we set a configuration
34044 option. Patch from Robert Hogan.
34045 - Don't try to create the datadir when running --verify-config or
34046 --hash-password. Resolves bug 540.
34049 Changes in version 0.2.0.9-alpha - 2007-10-24
34050 This ninth development snapshot switches clients to the new v3 directory
34051 system; allows servers to be listed in the network status even when they
34052 have the same nickname as a registered server; and fixes many other
34053 bugs including a big one that was causing some servers to disappear
34054 from the network status lists for a few hours each day.
34056 o Major features (directory system):
34057 - Clients now download v3 consensus networkstatus documents instead
34058 of v2 networkstatus documents. Clients and caches now base their
34059 opinions about routers on these consensus documents. Clients only
34060 download router descriptors listed in the consensus.
34061 - Authorities now list servers who have the same nickname as
34062 a different named server, but list them with a new flag,
34063 "Unnamed". Now we can list servers that happen to pick the same
34064 nickname as a server that registered two years ago and then
34065 disappeared. Partially implements proposal 122.
34066 - If the consensus lists a router as "Unnamed", the name is assigned
34067 to a different router: do not identify the router by that name.
34068 Partially implements proposal 122.
34069 - Authorities can now come to a consensus on which method to use to
34070 compute the consensus. This gives us forward compatibility.
34073 - Stop publishing a new server descriptor just because we HUP or
34074 when we find our DirPort to be reachable but won't actually publish
34075 it. New descriptors without any real changes are dropped by the
34076 authorities, and can screw up our "publish every 18 hours" schedule.
34078 - When a router wasn't listed in a new networkstatus, we were leaving
34079 the flags for that router alone -- meaning it remained Named,
34080 Running, etc -- even though absence from the networkstatus means
34081 that it shouldn't be considered to exist at all anymore. Now we
34082 clear all the flags for routers that fall out of the networkstatus
34083 consensus. Fixes bug 529; bugfix on 0.1.2.x.
34084 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
34085 extrainfo documents and then discard them immediately for not
34086 matching the latest router. Bugfix on 0.2.0.1-alpha.
34088 o Minor features (v3 directory protocol):
34089 - Allow tor-gencert to generate a new certificate without replacing
34091 - Allow certificates to include an address.
34092 - When we change our directory-cache settings, reschedule all voting
34093 and download operations.
34094 - Reattempt certificate downloads immediately on failure, as long as
34095 we haven't failed a threshold number of times yet.
34096 - Delay retrying consensus downloads while we're downloading
34097 certificates to verify the one we just got. Also, count getting a
34098 consensus that we already have (or one that isn't valid) as a failure,
34099 and count failing to get the certificates after 20 minutes as a
34101 - Build circuits and download descriptors even if our consensus is a
34102 little expired. (This feature will go away once authorities are
34105 o Minor features (router descriptor cache):
34106 - If we find a cached-routers file that's been sitting around for more
34107 than 28 days unmodified, then most likely it's a leftover from
34108 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
34110 - When we (as a cache) download a descriptor because it was listed
34111 in a consensus, remember when the consensus was supposed to expire,
34112 and don't expire the descriptor until then.
34114 o Minor features (performance):
34115 - Call routerlist_remove_old_routers() much less often. This should
34116 speed startup, especially on directory caches.
34117 - Don't try to launch new descriptor downloads quite so often when we
34118 already have enough directory information to build circuits.
34119 - Base64 decoding was actually showing up on our profile when parsing
34120 the initial descriptor file; switch to an in-process all-at-once
34121 implementation that's about 3.5x times faster than calling out to
34124 o Minor features (compilation):
34125 - Detect non-ASCII platforms (if any still exist) and refuse to
34126 build there: some of our code assumes that 'A' is 65 and so on.
34128 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
34129 - Make the "next period" votes into "current period" votes immediately
34130 after publishing the consensus; avoid a heisenbug that made them
34131 stick around indefinitely.
34132 - When we discard a vote as a duplicate, do not report this as
34134 - Treat missing v3 keys or certificates as an error when running as a
34135 v3 directory authority.
34136 - When we're configured to be a v3 authority, but we're only listed
34137 as a non-v3 authority in our DirServer line for ourself, correct
34139 - If an authority doesn't have a qualified hostname, just put
34140 its address in the vote. This fixes the problem where we referred to
34141 "moria on moria:9031."
34142 - Distinguish between detached signatures for the wrong period, and
34143 detached signatures for a divergent vote.
34144 - Fix a small memory leak when computing a consensus.
34145 - When there's no consensus, we were forming a vote every 30
34146 minutes, but writing the "valid-after" line in our vote based
34147 on our configured V3AuthVotingInterval: so unless the intervals
34148 matched up, we immediately rejected our own vote because it didn't
34149 start at the voting interval that caused us to construct a vote.
34151 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
34152 - Delete unverified-consensus when the real consensus is set.
34153 - Consider retrying a consensus networkstatus fetch immediately
34154 after one fails: don't wait 60 seconds to notice.
34155 - When fetching a consensus as a cache, wait until a newer consensus
34156 should exist before trying to replace the current one.
34157 - Use a more forgiving schedule for retrying failed consensus
34158 downloads than for other types.
34160 o Minor bugfixes (other directory issues):
34161 - Correct the implementation of "download votes by digest." Bugfix on
34163 - Authorities no longer send back "400 you're unreachable please fix
34164 it" errors to Tor servers that aren't online all the time. We're
34165 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
34167 o Minor bugfixes (controller):
34168 - Don't reset trusted dir server list when we set a configuration
34169 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
34170 - Respond to INT and TERM SIGNAL commands before we execute the
34171 signal, in case the signal shuts us down. We had a patch in
34172 0.1.2.1-alpha that tried to do this by queueing the response on
34173 the connection's buffer before shutting down, but that really
34174 isn't the same thing at all. Bug located by Matt Edman.
34176 o Minor bugfixes (misc):
34177 - Correctly check for bad options to the "PublishServerDescriptor"
34178 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
34179 - Stop leaking memory on failing case of base32_decode, and make
34180 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
34181 - Don't try to download extrainfo documents when we're trying to
34182 fetch enough directory info to build a circuit: having enough
34183 info should get priority. Bugfix on 0.2.0.x.
34184 - Don't complain that "your server has not managed to confirm that its
34185 ports are reachable" if we haven't been able to build any circuits
34186 yet. Bug found by spending four hours without a v3 consensus. Bugfix
34188 - Detect the reason for failing to mmap a descriptor file we just
34189 wrote, and give a more useful log message. Fixes bug 533. Bugfix
34192 o Code simplifications and refactoring:
34193 - Remove support for the old bw_accounting file: we've been storing
34194 bandwidth accounting information in the state file since
34195 0.1.2.5-alpha. This may result in bandwidth accounting errors
34196 if you try to upgrade from 0.1.1.x or earlier, or if you try to
34197 downgrade to 0.1.1.x or earlier.
34198 - New convenience code to locate a file within the DataDirectory.
34199 - Move non-authority functionality out of dirvote.c.
34200 - Refactor the arguments for router_pick_{directory_|trusteddir}server
34201 so that they all take the same named flags.
34204 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
34205 Unix users an easy way to script their Tor process (e.g. by
34206 adjusting bandwidth based on the time of the day).
34209 Changes in version 0.2.0.8-alpha - 2007-10-12
34210 This eighth development snapshot fixes a crash bug that's been bothering
34211 us since February 2007, lets bridge authorities store a list of bridge
34212 descriptors they've seen, gets v3 directory voting closer to working,
34213 starts caching v3 directory consensus documents on directory mirrors,
34214 and fixes a variety of smaller issues including some minor memory leaks.
34216 o Major features (router descriptor cache):
34217 - Store routers in a file called cached-descriptors instead of in
34218 cached-routers. Initialize cached-descriptors from cached-routers
34219 if the old format is around. The new format allows us to store
34220 annotations along with descriptors.
34221 - Use annotations to record the time we received each descriptor, its
34222 source, and its purpose.
34223 - Disable the SETROUTERPURPOSE controller command: it is now
34225 - Controllers should now specify cache=no or cache=yes when using
34226 the +POSTDESCRIPTOR command.
34227 - Bridge authorities now write bridge descriptors to disk, meaning
34228 we can export them to other programs and begin distributing them
34231 o Major features (directory authorities):
34232 - When a v3 authority is missing votes or signatures, it now tries
34234 - Directory authorities track weighted fractional uptime as well as
34235 weighted mean-time-between failures. WFU is suitable for deciding
34236 whether a node is "usually up", while MTBF is suitable for deciding
34237 whether a node is "likely to stay up." We need both, because
34238 "usually up" is a good requirement for guards, while "likely to
34239 stay up" is a good requirement for long-lived connections.
34241 o Major features (v3 directory system):
34242 - Caches now download v3 network status documents as needed,
34243 and download the descriptors listed in them.
34244 - All hosts now attempt to download and keep fresh v3 authority
34245 certificates, and re-attempt after failures.
34246 - More internal-consistency checks for vote parsing.
34248 o Major bugfixes (crashes):
34249 - If a connection is shut down abruptly because of something that
34250 happened inside connection_flushed_some(), do not call
34251 connection_finished_flushing(). Should fix bug 451. Bugfix on
34254 o Major bugfixes (performance):
34255 - Fix really bad O(n^2) performance when parsing a long list of
34256 routers: Instead of searching the entire list for an "extra-info "
34257 string which usually wasn't there, once for every routerinfo
34258 we read, just scan lines forward until we find one we like.
34260 - When we add data to a write buffer in response to the data on that
34261 write buffer getting low because of a flush, do not consider the
34262 newly added data as a candidate for immediate flushing, but rather
34263 make it wait until the next round of writing. Otherwise, we flush
34264 and refill recursively, and a single greedy TLS connection can
34265 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
34267 o Minor features (v3 authority system):
34268 - Add more ways for tools to download the votes that lead to the
34270 - Send a 503 when low on bandwidth and a vote, consensus, or
34271 certificate is requested.
34272 - If-modified-since is now implemented properly for all kinds of
34273 certificate requests.
34275 o Minor bugfixes (network statuses):
34276 - Tweak the implementation of proposal 109 slightly: allow at most
34277 two Tor servers on the same IP address, except if it's the location
34278 of a directory authority, in which case allow five. Bugfix on
34281 o Minor bugfixes (controller):
34282 - When sending a status event to the controller telling it that an
34283 OR address is reachable, set the port correctly. (Previously we
34284 were reporting the dir port.) Bugfix on 0.1.2.x.
34286 o Minor bugfixes (v3 directory system):
34287 - Fix logic to look up a cert by its signing key digest. Bugfix on
34289 - Only change the reply to a vote to "OK" if it's not already
34290 set. This gets rid of annoying "400 OK" log messages, which may
34291 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
34292 - When we get a valid consensus, recompute the voting schedule.
34293 - Base the valid-after time of a vote on the consensus voting
34294 schedule, not on our preferred schedule.
34295 - Make the return values and messages from signature uploads and
34296 downloads more sensible.
34297 - Fix a memory leak when serving votes and consensus documents, and
34298 another when serving certificates.
34300 o Minor bugfixes (performance):
34301 - Use a slightly simpler string hashing algorithm (copying Python's
34302 instead of Java's) and optimize our digest hashing algorithm to take
34303 advantage of 64-bit platforms and to remove some possibly-costly
34305 - Fix a minor memory leak whenever we parse guards from our state
34306 file. Bugfix on 0.2.0.7-alpha.
34307 - Fix a minor memory leak whenever we write out a file. Bugfix on
34309 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
34310 command. Bugfix on 0.2.0.5-alpha.
34312 o Minor bugfixes (portability):
34313 - On some platforms, accept() can return a broken address. Detect
34314 this more quietly, and deal accordingly. Fixes bug 483.
34315 - Stop calling tor_strlower() on uninitialized memory in some cases.
34316 Bugfix in 0.2.0.7-alpha.
34318 o Minor bugfixes (usability):
34319 - Treat some 403 responses from directory servers as INFO rather than
34320 WARN-severity events.
34321 - It's not actually an error to find a non-pending entry in the DNS
34322 cache when canceling a pending resolve. Don't log unless stuff is
34323 fishy. Resolves bug 463.
34325 o Minor bugfixes (anonymity):
34326 - Never report that we've used more bandwidth than we're willing to
34327 relay: it leaks how much non-relay traffic we're using. Resolves
34329 - When looking for a circuit to cannibalize, consider family as well
34330 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
34331 circuit cannibalization).
34333 o Code simplifications and refactoring:
34334 - Make a bunch of functions static. Remove some dead code.
34335 - Pull out about a third of the really big routerlist.c; put it in a
34336 new module, networkstatus.c.
34337 - Merge the extra fields in local_routerstatus_t back into
34338 routerstatus_t: we used to need one routerstatus_t for each
34339 authority's opinion, plus a local_routerstatus_t for the locally
34340 computed consensus opinion. To save space, we put the locally
34341 modified fields into local_routerstatus_t, and only the common
34342 stuff into routerstatus_t. But once v3 directories are in use,
34343 clients and caches will no longer need to hold authority opinions;
34344 thus, the rationale for keeping the types separate is now gone.
34345 - Make the code used to reschedule and reattempt downloads more
34347 - Turn all 'Are we a directory server/mirror?' logic into a call to
34349 - Remove the code to generate the oldest (v1) directory format.
34350 The code has been disabled since 0.2.0.5-alpha.
34353 Changes in version 0.2.0.7-alpha - 2007-09-21
34354 This seventh development snapshot makes bridges work again, makes bridge
34355 authorities work for the first time, fixes two huge performance flaws
34356 in hidden services, and fixes a variety of minor issues.
34358 o New directory authorities:
34359 - Set up moria1 and tor26 as the first v3 directory authorities. See
34360 doc/spec/dir-spec.txt for details on the new directory design.
34362 o Major bugfixes (crashes):
34363 - Fix possible segfaults in functions called from
34364 rend_process_relay_cell(). Bugfix on 0.1.2.x.
34366 o Major bugfixes (bridges):
34367 - Fix a bug that made servers send a "404 Not found" in response to
34368 attempts to fetch their server descriptor. This caused Tor servers
34369 to take many minutes to establish reachability for their DirPort,
34370 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
34371 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
34372 users configure that and specify a bridge with an identity
34373 fingerprint, now they will lookup the bridge descriptor at the
34374 default bridge authority via a one-hop tunnel, but once circuits
34375 are established they will switch to a three-hop tunnel for later
34376 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
34378 o Major bugfixes (hidden services):
34379 - Hidden services were choosing introduction points uniquely by
34380 hexdigest, but when constructing the hidden service descriptor
34381 they merely wrote the (potentially ambiguous) nickname.
34382 - Clients now use the v2 intro format for hidden service
34383 connections: they specify their chosen rendezvous point by identity
34384 digest rather than by (potentially ambiguous) nickname. Both
34385 are bugfixes on 0.1.2.x, and they could speed up hidden service
34386 connections dramatically. Thanks to Karsten Loesing.
34388 o Minor features (security):
34389 - As a client, do not believe any server that tells us that an
34390 address maps to an internal address space.
34391 - Make it possible to enable HashedControlPassword and
34392 CookieAuthentication at the same time.
34394 o Minor features (guard nodes):
34395 - Tag every guard node in our state file with the version that
34396 we believe added it, or with our own version if we add it. This way,
34397 if a user temporarily runs an old version of Tor and then switches
34398 back to a new one, she doesn't automatically lose her guards.
34400 o Minor features (speed):
34401 - When implementing AES counter mode, update only the portions of the
34402 counter buffer that need to change, and don't keep separate
34403 network-order and host-order counters when they are the same (i.e.,
34404 on big-endian hosts.)
34406 o Minor features (controller):
34407 - Accept LF instead of CRLF on controller, since some software has a
34408 hard time generating real Internet newlines.
34409 - Add GETINFO values for the server status events
34410 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
34413 o Removed features:
34414 - Routers no longer include bandwidth-history lines in their
34415 descriptors; this information is already available in extra-info
34416 documents, and including it in router descriptors took up 60%
34417 (!) of compressed router descriptor downloads. Completes
34418 implementation of proposal 104.
34419 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
34420 and TorControl.py, as they use the old v0 controller protocol,
34421 and are obsoleted by TorFlow anyway.
34422 - Drop support for v1 rendezvous descriptors, since we never used
34423 them anyway, and the code has probably rotted by now. Based on
34424 patch from Karsten Loesing.
34425 - On OSX, stop warning the user that kqueue support in libevent is
34426 "experimental", since it seems to have worked fine for ages.
34429 - When generating information telling us how to extend to a given
34430 router, do not try to include the nickname if it is absent. Fixes
34431 bug 467. Bugfix on 0.2.0.3-alpha.
34432 - Fix a user-triggerable (but not remotely-triggerable) segfault
34433 in expand_filename(). Bugfix on 0.1.2.x.
34434 - Fix a memory leak when freeing incomplete requests from DNSPort.
34435 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
34436 - Don't try to access (or alter) the state file when running
34437 --list-fingerprint or --verify-config or --hash-password. (Resolves
34438 bug 499.) Bugfix on 0.1.2.x.
34439 - Servers used to decline to publish their DirPort if their
34440 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
34441 were below a threshold. Now they only look at BandwidthRate and
34442 RelayBandwidthRate. Bugfix on 0.1.2.x.
34443 - Remove an optimization in the AES counter-mode code that assumed
34444 that the counter never exceeded 2^68. When the counter can be set
34445 arbitrarily as an IV (as it is by Karsten's new hidden services
34446 code), this assumption no longer holds. Bugfix on 0.1.2.x.
34447 - Resume listing "AUTHORITY" flag for authorities in network status.
34448 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
34450 o Code simplifications and refactoring:
34451 - Revamp file-writing logic so we don't need to have the entire
34452 contents of a file in memory at once before we write to disk. Tor,
34454 - Turn "descriptor store" into a full-fledged type.
34455 - Move all NT services code into a separate source file.
34456 - Unify all code that computes medians, percentile elements, etc.
34457 - Get rid of a needless malloc when parsing address policies.
34460 Changes in version 0.1.2.17 - 2007-08-30
34461 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
34462 X bundles. Vidalia 0.0.14 makes authentication required for the
34463 ControlPort in the default configuration, which addresses important
34464 security risks. Everybody who uses Vidalia (or another controller)
34467 In addition, this Tor update fixes major load balancing problems with
34468 path selection, which should speed things up a lot once many people
34471 o Major bugfixes (security):
34472 - We removed support for the old (v0) control protocol. It has been
34473 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
34474 become more of a headache than it's worth.
34476 o Major bugfixes (load balancing):
34477 - When choosing nodes for non-guard positions, weight guards
34478 proportionally less, since they already have enough load. Patch
34480 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
34481 will allow fast Tor servers to get more attention.
34482 - When we're upgrading from an old Tor version, forget our current
34483 guards and pick new ones according to the new weightings. These
34484 three load balancing patches could raise effective network capacity
34485 by a factor of four. Thanks to Mike Perry for measurements.
34487 o Major bugfixes (stream expiration):
34488 - Expire not-yet-successful application streams in all cases if
34489 they've been around longer than SocksTimeout. Right now there are
34490 some cases where the stream will live forever, demanding a new
34491 circuit every 15 seconds. Fixes bug 454; reported by lodger.
34493 o Minor features (controller):
34494 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
34495 is valid before any authentication has been received. It tells
34496 a controller what kind of authentication is expected, and what
34497 protocol is spoken. Implements proposal 119.
34499 o Minor bugfixes (performance):
34500 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
34501 greatly speeding up loading cached-routers from disk on startup.
34502 - Disable sentinel-based debugging for buffer code: we squashed all
34503 the bugs that this was supposed to detect a long time ago, and now
34504 its only effect is to change our buffer sizes from nice powers of
34505 two (which platform mallocs tend to like) to values slightly over
34506 powers of two (which make some platform mallocs sad).
34508 o Minor bugfixes (misc):
34509 - If exit bandwidth ever exceeds one third of total bandwidth, then
34510 use the correct formula to weight exit nodes when choosing paths.
34511 Based on patch from Mike Perry.
34512 - Choose perfectly fairly among routers when choosing by bandwidth and
34513 weighting by fraction of bandwidth provided by exits. Previously, we
34514 would choose with only approximate fairness, and correct ourselves
34515 if we ran off the end of the list.
34516 - If we require CookieAuthentication but we fail to write the
34517 cookie file, we would warn but not exit, and end up in a state
34518 where no controller could authenticate. Now we exit.
34519 - If we require CookieAuthentication, stop generating a new cookie
34520 every time we change any piece of our config.
34521 - Refuse to start with certain directory authority keys, and
34522 encourage people using them to stop.
34523 - Terminate multi-line control events properly. Original patch
34525 - Fix a minor memory leak when we fail to find enough suitable
34526 servers to choose a circuit.
34527 - Stop leaking part of the descriptor when we run into a particularly
34528 unparseable piece of it.
34531 Changes in version 0.2.0.6-alpha - 2007-08-26
34532 This sixth development snapshot features a new Vidalia version in the
34533 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
34534 the ControlPort in the default configuration, which addresses important
34537 In addition, this snapshot fixes major load balancing problems
34538 with path selection, which should speed things up a lot once many
34539 people have upgraded. The directory authorities also use a new
34540 mean-time-between-failure approach to tracking which servers are stable,
34541 rather than just looking at the most recent uptime.
34543 o New directory authorities:
34544 - Set up Tonga as the default bridge directory authority.
34547 - Directory authorities now track servers by weighted
34548 mean-times-between-failures. When we have 4 or more days of data,
34549 use measured MTBF rather than declared uptime to decide whether
34550 to call a router Stable. Implements proposal 108.
34552 o Major bugfixes (load balancing):
34553 - When choosing nodes for non-guard positions, weight guards
34554 proportionally less, since they already have enough load. Patch
34556 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
34557 will allow fast Tor servers to get more attention.
34558 - When we're upgrading from an old Tor version, forget our current
34559 guards and pick new ones according to the new weightings. These
34560 three load balancing patches could raise effective network capacity
34561 by a factor of four. Thanks to Mike Perry for measurements.
34563 o Major bugfixes (descriptor parsing):
34564 - Handle unexpected whitespace better in malformed descriptors. Bug
34565 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
34568 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
34569 GETINFO for Torstat to use until it can switch to using extrainfos.
34570 - Optionally (if built with -DEXPORTMALLINFO) export the output
34571 of mallinfo via http, as tor/mallinfo.txt. Only accessible
34575 - Do not intermix bridge routers with controller-added
34576 routers. (Bugfix on 0.2.0.x)
34577 - Do not fail with an assert when accept() returns an unexpected
34578 address family. Addresses but does not wholly fix bug 483. (Bugfix
34580 - Let directory authorities startup even when they can't generate
34581 a descriptor immediately, e.g. because they don't know their
34583 - Stop putting the authentication cookie in a file called "0"
34584 in your working directory if you don't specify anything for the
34585 new CookieAuthFile option. Reported by Matt Edman.
34586 - Make it possible to read the PROTOCOLINFO response in a way that
34587 conforms to our control-spec. Reported by Matt Edman.
34588 - Fix a minor memory leak when we fail to find enough suitable
34589 servers to choose a circuit. Bugfix on 0.1.2.x.
34590 - Stop leaking part of the descriptor when we run into a particularly
34591 unparseable piece of it. Bugfix on 0.1.2.x.
34592 - Unmap the extrainfo cache file on exit.
34595 Changes in version 0.2.0.5-alpha - 2007-08-19
34596 This fifth development snapshot fixes compilation on Windows again;
34597 fixes an obnoxious client-side bug that slowed things down and put
34598 extra load on the network; gets us closer to using the v3 directory
34599 voting scheme; makes it easier for Tor controllers to use cookie-based
34600 authentication; and fixes a variety of other bugs.
34602 o Removed features:
34603 - Version 1 directories are no longer generated in full. Instead,
34604 authorities generate and serve "stub" v1 directories that list
34605 no servers. This will stop Tor versions 0.1.0.x and earlier from
34606 working, but (for security reasons) nobody should be running those
34609 o Major bugfixes (compilation, 0.2.0.x):
34610 - Try to fix Win32 compilation again: improve checking for IPv6 types.
34611 - Try to fix MSVC compilation: build correctly on platforms that do
34612 not define s6_addr16 or s6_addr32.
34613 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
34616 o Major bugfixes (stream expiration):
34617 - Expire not-yet-successful application streams in all cases if
34618 they've been around longer than SocksTimeout. Right now there are
34619 some cases where the stream will live forever, demanding a new
34620 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
34621 reported by lodger.
34623 o Minor features (directory servers):
34624 - When somebody requests a list of statuses or servers, and we have
34625 none of those, return a 404 rather than an empty 200.
34627 o Minor features (directory voting):
34628 - Store v3 consensus status consensuses on disk, and reload them
34631 o Minor features (security):
34632 - Warn about unsafe ControlPort configurations.
34633 - Refuse to start with certain directory authority keys, and
34634 encourage people using them to stop.
34636 o Minor features (controller):
34637 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
34638 is valid before any authentication has been received. It tells
34639 a controller what kind of authentication is expected, and what
34640 protocol is spoken. Implements proposal 119.
34641 - New config option CookieAuthFile to choose a new location for the
34642 cookie authentication file, and config option
34643 CookieAuthFileGroupReadable to make it group-readable.
34645 o Minor features (unit testing):
34646 - Add command-line arguments to unit-test executable so that we can
34647 invoke any chosen test from the command line rather than having
34648 to run the whole test suite at once; and so that we can turn on
34649 logging for the unit tests.
34651 o Minor bugfixes (on 0.1.2.x):
34652 - If we require CookieAuthentication but we fail to write the
34653 cookie file, we would warn but not exit, and end up in a state
34654 where no controller could authenticate. Now we exit.
34655 - If we require CookieAuthentication, stop generating a new cookie
34656 every time we change any piece of our config.
34657 - When loading bandwidth history, do not believe any information in
34658 the future. Fixes bug 434.
34659 - When loading entry guard information, do not believe any information
34661 - When we have our clock set far in the future and generate an
34662 onion key, then re-set our clock to be correct, we should not stop
34663 the onion key from getting rotated.
34664 - Clean up torrc sample config file.
34665 - Do not automatically run configure from autogen.sh. This
34666 non-standard behavior tended to annoy people who have built other
34669 o Minor bugfixes (on 0.2.0.x):
34670 - Fix a bug with AutomapHostsOnResolve that would always cause
34671 the second request to fail. Bug reported by Kate. Bugfix on
34673 - Fix a bug in ADDRMAP controller replies that would sometimes
34674 try to print a NULL. Patch from tup.
34675 - Read v3 directory authority keys from the right location.
34676 - Numerous bugfixes to directory voting code.
34679 Changes in version 0.1.2.16 - 2007-08-01
34680 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
34681 remote attacker in certain situations to rewrite the user's torrc
34682 configuration file. This can completely compromise anonymity of users
34683 in most configurations, including those running the Vidalia bundles,
34684 TorK, etc. Or worse.
34686 o Major security fixes:
34687 - Close immediately after missing authentication on control port;
34688 do not allow multiple authentication attempts.
34691 Changes in version 0.2.0.4-alpha - 2007-08-01
34692 This fourth development snapshot fixes a critical security vulnerability
34693 for most users, specifically those running Vidalia, TorK, etc. Everybody
34694 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
34696 o Major security fixes:
34697 - Close immediately after missing authentication on control port;
34698 do not allow multiple authentication attempts.
34700 o Major bugfixes (compilation):
34701 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
34704 o Minor features (performance):
34705 - Be even more aggressive about releasing RAM from small
34706 empty buffers. Thanks to our free-list code, this shouldn't be too
34707 performance-intensive.
34708 - Disable sentinel-based debugging for buffer code: we squashed all
34709 the bugs that this was supposed to detect a long time ago, and
34710 now its only effect is to change our buffer sizes from nice
34711 powers of two (which platform mallocs tend to like) to values
34712 slightly over powers of two (which make some platform mallocs sad).
34713 - Log malloc statistics from mallinfo() on platforms where it
34717 Changes in version 0.2.0.3-alpha - 2007-07-29
34718 This third development snapshot introduces new experimental
34719 blocking-resistance features and a preliminary version of the v3
34720 directory voting design, and includes many other smaller features
34724 - The first pieces of our "bridge" design for blocking-resistance
34725 are implemented. People can run bridge directory authorities;
34726 people can run bridges; and people can configure their Tor clients
34727 with a set of bridges to use as the first hop into the Tor network.
34728 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
34730 - Create listener connections before we setuid to the configured
34731 User and Group. Now non-Windows users can choose port values
34732 under 1024, start Tor as root, and have Tor bind those ports
34733 before it changes to another UID. (Windows users could already
34735 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
34736 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
34737 on "vserver" accounts. (Patch from coderman.)
34738 - Be even more aggressive about separating local traffic from relayed
34739 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
34741 o Major features (experimental):
34742 - First cut of code for "v3 dir voting": directory authorities will
34743 vote on a common network status document rather than each publishing
34744 their own opinion. This code needs more testing and more corner-case
34745 handling before it's ready for use.
34748 - Directory authorities now call routers Fast if their bandwidth is
34749 at least 100KB/s, and consider their bandwidth adequate to be a
34750 Guard if it is at least 250KB/s, no matter the medians. This fix
34751 complements proposal 107. [Bugfix on 0.1.2.x]
34752 - Directory authorities now never mark more than 3 servers per IP as
34753 Valid and Running. (Implements proposal 109, by Kevin Bauer and
34755 - Minor change to organizationName and commonName generation
34756 procedures in TLS certificates during Tor handshakes, to invalidate
34757 some earlier censorware approaches. This is not a long-term
34758 solution, but applying it will give us a bit of time to look into
34759 the epidemiology of countermeasures as they spread.
34761 o Major bugfixes (directory):
34762 - Rewrite directory tokenization code to never run off the end of
34763 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
34765 o Minor features (controller):
34766 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
34767 match requests to applications. (Patch from Robert Hogan.)
34768 - Report address and port correctly on connections to DNSPort. (Patch
34769 from Robert Hogan.)
34770 - Add a RESOLVE command to launch hostname lookups. (Original patch
34771 from Robert Hogan.)
34772 - Add GETINFO status/enough-dir-info to let controllers tell whether
34773 Tor has downloaded sufficient directory information. (Patch
34775 - You can now use the ControlSocket option to tell Tor to listen for
34776 controller connections on Unix domain sockets on systems that
34777 support them. (Patch from Peter Palfrader.)
34778 - STREAM NEW events are generated for DNSPort requests and for
34779 tunneled directory connections. (Patch from Robert Hogan.)
34780 - New "GETINFO address-mappings/*" command to get address mappings
34781 with expiry information. "addr-mappings/*" is now deprecated.
34784 o Minor features (misc):
34785 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
34787 - The tor-gencert tool for v3 directory authorities now creates all
34788 files as readable to the file creator only, and write-protects
34789 the authority identity key.
34790 - When dumping memory usage, list bytes used in buffer memory
34792 - When running with dmalloc, dump more stats on hup and on exit.
34793 - Directory authorities now fail quickly and (relatively) harmlessly
34794 if they generate a network status document that is somehow
34797 o Traffic load balancing improvements:
34798 - If exit bandwidth ever exceeds one third of total bandwidth, then
34799 use the correct formula to weight exit nodes when choosing paths.
34800 (Based on patch from Mike Perry.)
34801 - Choose perfectly fairly among routers when choosing by bandwidth and
34802 weighting by fraction of bandwidth provided by exits. Previously, we
34803 would choose with only approximate fairness, and correct ourselves
34804 if we ran off the end of the list. [Bugfix on 0.1.2.x]
34806 o Performance improvements:
34807 - Be more aggressive with freeing buffer RAM or putting it on the
34809 - Use Critical Sections rather than Mutexes for synchronizing threads
34810 on win32; Mutexes are heavier-weight, and designed for synchronizing
34813 o Deprecated and removed features:
34814 - RedirectExits is now deprecated.
34815 - Stop allowing address masks that do not correspond to bit prefixes.
34816 We have warned about these for a really long time; now it's time
34817 to reject them. (Patch from croup.)
34819 o Minor bugfixes (directory):
34820 - Fix another crash bug related to extra-info caching. (Bug found by
34821 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
34822 - Directories no longer return a "304 not modified" when they don't
34823 have the networkstatus the client asked for. Also fix a memory
34824 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
34825 - We had accidentally labelled 0.1.2.x directory servers as not
34826 suitable for begin_dir requests, and had labelled no directory
34827 servers as suitable for uploading extra-info documents. [Bugfix
34830 o Minor bugfixes (dns):
34831 - Fix a crash when DNSPort is set more than once. (Patch from Robert
34832 Hogan.) [Bugfix on 0.2.0.2-alpha]
34833 - Add DNSPort connections to the global connection list, so that we
34834 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
34836 - Fix a dangling reference that could lead to a crash when DNSPort is
34837 changed or closed (Patch from Robert Hogan.) [Bugfix on
34840 o Minor bugfixes (controller):
34841 - Provide DNS expiry times in GMT, not in local time. For backward
34842 compatibility, ADDRMAP events only provide GMT expiry in an extended
34843 field. "GETINFO address-mappings" always does the right thing.
34844 - Use CRLF line endings properly in NS events.
34845 - Terminate multi-line control events properly. (Original patch
34846 from tup.) [Bugfix on 0.1.2.x-alpha]
34847 - Do not include spaces in SOURCE_ADDR fields in STREAM
34848 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
34851 Changes in version 0.1.2.15 - 2007-07-17
34852 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
34853 problems, fixes compilation on BSD, and fixes a variety of other
34854 bugs. Everybody should upgrade.
34856 o Major bugfixes (compilation):
34857 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
34859 o Major bugfixes (crashes):
34860 - Try even harder not to dereference the first character after
34861 an mmap(). Reported by lodger.
34862 - Fix a crash bug in directory authorities when we re-number the
34863 routerlist while inserting a new router.
34864 - When the cached-routers file is an even multiple of the page size,
34865 don't run off the end and crash. (Fixes bug 455; based on idea
34867 - Fix eventdns.c behavior on Solaris: It is critical to include
34868 orconfig.h _before_ sys/types.h, so that we can get the expected
34869 definition of _FILE_OFFSET_BITS.
34871 o Major bugfixes (security):
34872 - Fix a possible buffer overrun when using BSD natd support. Bug
34874 - When sending destroy cells from a circuit's origin, don't include
34875 the reason for tearing down the circuit. The spec says we didn't,
34876 and now we actually don't. Reported by lodger.
34877 - Keep streamids from different exits on a circuit separate. This
34878 bug may have allowed other routers on a given circuit to inject
34879 cells into streams. Reported by lodger; fixes bug 446.
34880 - If there's a never-before-connected-to guard node in our list,
34881 never choose any guards past it. This way we don't expand our
34882 guard list unless we need to.
34884 o Minor bugfixes (guard nodes):
34885 - Weight guard selection by bandwidth, so that low-bandwidth nodes
34886 don't get overused as guards.
34888 o Minor bugfixes (directory):
34889 - Correctly count the number of authorities that recommend each
34890 version. Previously, we were under-counting by 1.
34891 - Fix a potential crash bug when we load many server descriptors at
34892 once and some of them make others of them obsolete. Fixes bug 458.
34894 o Minor bugfixes (hidden services):
34895 - Stop tearing down the whole circuit when the user asks for a
34896 connection to a port that the hidden service didn't configure.
34899 o Minor bugfixes (misc):
34900 - On Windows, we were preventing other processes from reading
34901 cached-routers while Tor was running. Reported by janbar.
34902 - Fix a possible (but very unlikely) bug in picking routers by
34903 bandwidth. Add a log message to confirm that it is in fact
34904 unlikely. Patch from lodger.
34905 - Backport a couple of memory leak fixes.
34906 - Backport miscellaneous cosmetic bugfixes.
34909 Changes in version 0.2.0.2-alpha - 2007-06-02
34910 o Major bugfixes on 0.2.0.1-alpha:
34911 - Fix an assertion failure related to servers without extra-info digests.
34912 Resolves bugs 441 and 442.
34914 o Minor features (directory):
34915 - Support "If-Modified-Since" when answering HTTP requests for
34916 directories, running-routers documents, and network-status documents.
34917 (There's no need to support it for router descriptors, since those
34918 are downloaded by descriptor digest.)
34920 o Minor build issues:
34921 - Clear up some MIPSPro compiler warnings.
34922 - When building from a tarball on a machine that happens to have SVK
34923 installed, report the micro-revision as whatever version existed
34924 in the tarball, not as "x".
34927 Changes in version 0.2.0.1-alpha - 2007-06-01
34928 This early development snapshot provides new features for people running
34929 Tor as both a client and a server (check out the new RelayBandwidth
34930 config options); lets Tor run as a DNS proxy; and generally moves us
34931 forward on a lot of fronts.
34933 o Major features, server usability:
34934 - New config options RelayBandwidthRate and RelayBandwidthBurst:
34935 a separate set of token buckets for relayed traffic. Right now
34936 relayed traffic is defined as answers to directory requests, and
34937 OR connections that don't have any local circuits on them.
34939 o Major features, client usability:
34940 - A client-side DNS proxy feature to replace the need for
34941 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
34942 for DNS requests on port 9999, use the Tor network to resolve them
34943 anonymously, and send the reply back like a regular DNS server.
34944 The code still only implements a subset of DNS.
34945 - Make PreferTunneledDirConns and TunnelDirConns work even when
34946 we have no cached directory info. This means Tor clients can now
34947 do all of their connections protected by TLS.
34949 o Major features, performance and efficiency:
34950 - Directory authorities accept and serve "extra info" documents for
34951 routers. These documents contain fields from router descriptors
34952 that aren't usually needed, and that use a lot of excess
34953 bandwidth. Once these fields are removed from router descriptors,
34954 the bandwidth savings should be about 60%. [Partially implements
34956 - Servers upload extra-info documents to any authority that accepts
34957 them. Authorities (and caches that have been configured to download
34958 extra-info documents) download them as needed. [Partially implements
34960 - Change the way that Tor buffers data that it is waiting to write.
34961 Instead of queueing data cells in an enormous ring buffer for each
34962 client->OR or OR->OR connection, we now queue cells on a separate
34963 queue for each circuit. This lets us use less slack memory, and
34964 will eventually let us be smarter about prioritizing different kinds
34966 - Use memory pools to allocate cells with better speed and memory
34967 efficiency, especially on platforms where malloc() is inefficient.
34968 - Stop reading on edge connections when their corresponding circuit
34969 buffers are full; start again as the circuits empty out.
34971 o Major features, other:
34972 - Add an HSAuthorityRecordStats option that hidden service authorities
34973 can use to track statistics of overall hidden service usage without
34974 logging information that would be very useful to an attacker.
34975 - Start work implementing multi-level keys for directory authorities:
34976 Add a standalone tool to generate key certificates. (Proposal 103.)
34979 - Directory authorities now call routers Stable if they have an
34980 uptime of at least 30 days, even if that's not the median uptime
34981 in the network. Implements proposal 107, suggested by Kevin Bauer
34984 o Minor fixes (resource management):
34985 - Count the number of open sockets separately from the number
34986 of active connection_t objects. This will let us avoid underusing
34987 our allocated connection limit.
34988 - We no longer use socket pairs to link an edge connection to an
34989 anonymous directory connection or a DirPort test connection.
34990 Instead, we track the link internally and transfer the data
34991 in-process. This saves two sockets per "linked" connection (at the
34992 client and at the server), and avoids the nasty Windows socketpair()
34994 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
34995 for every single inactive connection_t. Free items from the
34996 4k/16k-buffer free lists when they haven't been used for a while.
34998 o Minor features (build):
34999 - Make autoconf search for libevent, openssl, and zlib consistently.
35000 - Update deprecated macros in configure.in.
35001 - When warning about missing headers, tell the user to let us
35002 know if the compile succeeds anyway, so we can downgrade the
35004 - Include the current subversion revision as part of the version
35005 string: either fetch it directly if we're in an SVN checkout, do
35006 some magic to guess it if we're in an SVK checkout, or use
35007 the last-detected version if we're building from a .tar.gz.
35008 Use this version consistently in log messages.
35010 o Minor features (logging):
35011 - Always prepend "Bug: " to any log message about a bug.
35012 - Put a platform string (e.g. "Linux i686") in the startup log
35013 message, so when people paste just their logs, we know if it's
35014 OpenBSD or Windows or what.
35015 - When logging memory usage, break down memory used in buffers by
35018 o Minor features (directory system):
35019 - New config option V2AuthoritativeDirectory that all directory
35020 authorities should set. This will let future authorities choose
35021 not to serve V2 directory information.
35022 - Directory authorities allow multiple router descriptors and/or extra
35023 info documents to be uploaded in a single go. This will make
35024 implementing proposal 104 simpler.
35026 o Minor features (controller):
35027 - Add a new config option __DisablePredictedCircuits designed for
35028 use by the controller, when we don't want Tor to build any circuits
35030 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
35031 so we can exit from the middle of the circuit.
35032 - Implement "getinfo status/circuit-established".
35033 - Implement "getinfo status/version/..." so a controller can tell
35034 whether the current version is recommended, and whether any versions
35035 are good, and how many authorities agree. (Patch from shibz.)
35037 o Minor features (hidden services):
35038 - Allow multiple HiddenServicePort directives with the same virtual
35039 port; when they occur, the user is sent round-robin to one
35040 of the target ports chosen at random. Partially fixes bug 393 by
35041 adding limited ad-hoc round-robining.
35043 o Minor features (other):
35045 - Add a new AutomapHostsOnResolve option: when it is enabled, any
35046 resolve request for hosts matching a given pattern causes Tor to
35047 generate an internal virtual address mapping for that host. This
35048 allows DNSPort to work sensibly with hidden service users. By
35049 default, .exit and .onion addresses are remapped; the list of
35050 patterns can be reconfigured with AutomapHostsSuffixes.
35051 - Add an "-F" option to tor-resolve to force a resolve for a .onion
35052 address. Thanks to the AutomapHostsOnResolve option, this is no
35053 longer a completely silly thing to do.
35054 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
35055 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
35056 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
35057 minus 1 byte: the actual maximum declared bandwidth.
35059 o Removed features:
35060 - Removed support for the old binary "version 0" controller protocol.
35061 This has been deprecated since 0.1.1, and warnings have been issued
35062 since 0.1.2. When we encounter a v0 control message, we now send
35063 back an error and close the connection.
35064 - Remove the old "dns worker" server DNS code: it hasn't been default
35065 since 0.1.2.2-alpha, and all the servers seem to be using the new
35068 o Minor bugfixes (portability):
35069 - Even though Windows is equally happy with / and \ as path separators,
35070 try to use \ consistently on Windows and / consistently on Unix: it
35071 makes the log messages nicer.
35072 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
35073 - Read resolv.conf files correctly on platforms where read() returns
35074 partial results on small file reads.
35076 o Minor bugfixes (directory):
35077 - Correctly enforce that elements of directory objects do not appear
35078 more often than they are allowed to appear.
35079 - When we are reporting the DirServer line we just parsed, we were
35080 logging the second stanza of the key fingerprint, not the first.
35082 o Minor bugfixes (logging):
35083 - When we hit an EOF on a log (probably because we're shutting down),
35084 don't try to remove the log from the list: just mark it as
35085 unusable. (Bulletproofs against bug 222.)
35087 o Minor bugfixes (other):
35088 - In the exitlist script, only consider the most recently published
35089 server descriptor for each server. Also, when the user requests
35090 a list of servers that _reject_ connections to a given address,
35091 explicitly exclude the IPs that also have servers that accept
35092 connections to that address. (Resolves bug 405.)
35093 - Stop allowing hibernating servers to be "stable" or "fast".
35094 - On Windows, we were preventing other processes from reading
35095 cached-routers while Tor was running. (Reported by janbar)
35096 - Make the NodeFamilies config option work. (Reported by
35097 lodger -- it has never actually worked, even though we added it
35099 - Check return values from pthread_mutex functions.
35100 - Don't save non-general-purpose router descriptors to the disk cache,
35101 because we have no way of remembering what their purpose was when
35103 - Add even more asserts to hunt down bug 417.
35104 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
35105 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
35106 Add a log message to confirm that it is in fact unlikely.
35108 o Minor bugfixes (controller):
35109 - Make 'getinfo fingerprint' return a 551 error if we're not a
35110 server, so we match what the control spec claims we do. Reported
35112 - Fix a typo in an error message when extendcircuit fails that
35113 caused us to not follow the \r\n-based delimiter protocol. Reported
35116 o Code simplifications and refactoring:
35117 - Stop passing around circuit_t and crypt_path_t pointers that are
35118 implicit in other procedure arguments.
35119 - Drop the old code to choke directory connections when the
35120 corresponding OR connections got full: thanks to the cell queue
35121 feature, OR conns don't get full any more.
35122 - Make dns_resolve() handle attaching connections to circuits
35123 properly, so the caller doesn't have to.
35124 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
35125 - Keep the connection array as a dynamic smartlist_t, rather than as
35126 a fixed-sized array. This is important, as the number of connections
35127 is becoming increasingly decoupled from the number of sockets.
35130 Changes in version 0.1.2.14 - 2007-05-25
35131 Tor 0.1.2.14 changes the addresses of two directory authorities (this
35132 change especially affects those who serve or use hidden services),
35133 and fixes several other crash- and security-related bugs.
35135 o Directory authority changes:
35136 - Two directory authorities (moria1 and moria2) just moved to new
35137 IP addresses. This change will particularly affect those who serve
35138 or use hidden services.
35140 o Major bugfixes (crashes):
35141 - If a directory server runs out of space in the connection table
35142 as it's processing a begin_dir request, it will free the exit stream
35143 but leave it attached to the circuit, leading to unpredictable
35144 behavior. (Reported by seeess, fixes bug 425.)
35145 - Fix a bug in dirserv_remove_invalid() that would cause authorities
35146 to corrupt memory under some really unlikely scenarios.
35147 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
35148 - Avoid segfaults when reading from mmaped descriptor file. (Reported
35151 o Major bugfixes (security):
35152 - When choosing an entry guard for a circuit, avoid using guards
35153 that are in the same family as the chosen exit -- not just guards
35154 that are exactly the chosen exit. (Reported by lodger.)
35156 o Major bugfixes (resource management):
35157 - If a directory authority is down, skip it when deciding where to get
35158 networkstatus objects or descriptors. Otherwise we keep asking
35159 every 10 seconds forever. Fixes bug 384.
35160 - Count it as a failure if we fetch a valid network-status but we
35161 don't want to keep it. Otherwise we'll keep fetching it and keep
35162 not wanting to keep it. Fixes part of bug 422.
35163 - If all of our dirservers have given us bad or no networkstatuses
35164 lately, then stop hammering them once per minute even when we
35165 think they're failed. Fixes another part of bug 422.
35168 - Actually set the purpose correctly for descriptors inserted with
35169 purpose=controller.
35170 - When we have k non-v2 authorities in our DirServer config,
35171 we ignored the last k authorities in the list when updating our
35173 - Correctly back-off from requesting router descriptors that we are
35174 having a hard time downloading.
35175 - Read resolv.conf files correctly on platforms where read() returns
35176 partial results on small file reads.
35177 - Don't rebuild the entire router store every time we get 32K of
35178 routers: rebuild it when the journal gets very large, or when
35179 the gaps in the store get very large.
35182 - When routers publish SVN revisions in their router descriptors,
35183 authorities now include those versions correctly in networkstatus
35185 - Warn when using a version of libevent before 1.3b to run a server on
35186 OSX or BSD: these versions interact badly with userspace threads.
35189 Changes in version 0.1.2.13 - 2007-04-24
35190 This release features some major anonymity fixes, such as safer path
35191 selection; better client performance; faster bootstrapping, better
35192 address detection, and better DNS support for servers; write limiting as
35193 well as read limiting to make servers easier to run; and a huge pile of
35194 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
35196 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
35197 of the Freenode IRC network, remembering his patience and vision for
35198 free speech on the Internet.
35201 - Fix a memory leak when we ask for "all" networkstatuses and we
35202 get one we don't recognize.
35203 - Add more asserts to hunt down bug 417.
35204 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
35207 Changes in version 0.1.2.12-rc - 2007-03-16
35209 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
35210 directory information requested inside Tor connections (i.e. via
35211 begin_dir cells). It only triggered when the same connection was
35212 serving other data at the same time. Reported by seeess.
35215 - When creating a circuit via the controller, send a 'launched'
35216 event when we're done, so we follow the spec better.
35219 Changes in version 0.1.2.11-rc - 2007-03-15
35220 o Minor bugfixes (controller), reported by daejees:
35221 - Correct the control spec to match how the code actually responds
35222 to 'getinfo addr-mappings/*'.
35223 - The control spec described a GUARDS event, but the code
35224 implemented a GUARD event. Standardize on GUARD, but let people
35225 ask for GUARDS too.
35228 Changes in version 0.1.2.10-rc - 2007-03-07
35229 o Major bugfixes (Windows):
35230 - Do not load the NT services library functions (which may not exist)
35231 just to detect if we're a service trying to shut down. Now we run
35232 on Win98 and friends again.
35234 o Minor bugfixes (other):
35235 - Clarify a couple of log messages.
35236 - Fix a misleading socks5 error number.
35239 Changes in version 0.1.2.9-rc - 2007-03-02
35240 o Major bugfixes (Windows):
35241 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
35242 of the usual GCC "%llu". This prevents a bug when saving 64-bit
35243 int configuration values: the high-order 32 bits would get
35244 truncated. In particular, we were being bitten by the default
35245 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
35246 and maybe also bug 397.)
35248 o Minor bugfixes (performance):
35249 - Use OpenSSL's AES implementation on platforms where it's faster.
35250 This could save us as much as 10% CPU usage.
35252 o Minor bugfixes (server):
35253 - Do not rotate onion key immediately after setting it for the first
35256 o Minor bugfixes (directory authorities):
35257 - Stop calling servers that have been hibernating for a long time
35258 "stable". Also, stop letting hibernating or obsolete servers affect
35259 uptime and bandwidth cutoffs.
35260 - Stop listing hibernating servers in the v1 directory.
35262 o Minor bugfixes (hidden services):
35263 - Upload hidden service descriptors slightly less often, to reduce
35264 load on authorities.
35266 o Minor bugfixes (other):
35267 - Fix an assert that could trigger if a controller quickly set then
35268 cleared EntryNodes. Bug found by Udo van den Heuvel.
35269 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
35271 - Fix a potential race condition in the rpm installer. Found by
35273 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
35274 of 2 as indicating that the server is completely bad; it sometimes
35275 means that the server is just bad for the request in question. (may fix
35276 the last of bug 326.)
35277 - Disable encrypted directory connections when we don't have a server
35278 descriptor for the destination. We'll get this working again in
35282 Changes in version 0.1.2.8-beta - 2007-02-26
35283 o Major bugfixes (crashes):
35284 - Stop crashing when the controller asks us to resetconf more than
35285 one config option at once. (Vidalia 0.0.11 does this.)
35286 - Fix a crash that happened on Win98 when we're given command-line
35287 arguments: don't try to load NT service functions from advapi32.dll
35288 except when we need them. (Bug introduced in 0.1.2.7-alpha;
35290 - Fix a longstanding obscure crash bug that could occur when
35291 we run out of DNS worker processes. (Resolves bug 390.)
35293 o Major bugfixes (hidden services):
35294 - Correctly detect whether hidden service descriptor downloads are
35295 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
35297 o Major bugfixes (accounting):
35298 - When we start during an accounting interval before it's time to wake
35299 up, remember to wake up at the correct time. (May fix bug 342.)
35301 o Minor bugfixes (controller):
35302 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
35303 clear the corresponding on_circuit variable, and remember later
35304 that we don't need to send a redundant CLOSED event. Resolves part
35306 - Report events where a resolve succeeded or where we got a socks
35307 protocol error correctly, rather than calling both of them
35309 - Change reported stream target addresses to IP consistently when
35310 we finally get the IP from an exit node.
35311 - Send log messages to the controller even if they happen to be very
35314 o Minor bugfixes (other):
35315 - Display correct results when reporting which versions are
35316 recommended, and how recommended they are. (Resolves bug 383.)
35317 - Improve our estimates for directory bandwidth to be less random:
35318 guess that an unrecognized directory will have the average bandwidth
35319 from all known directories, not that it will have the average
35320 bandwidth from those directories earlier than it on the list.
35321 - If we start a server with ClientOnly 1, then set ClientOnly to 0
35322 and hup, stop triggering an assert based on an empty onion_key.
35323 - On platforms with no working mmap() equivalent, don't warn the
35324 user when cached-routers doesn't exist.
35325 - Warn the user when mmap() [or its equivalent] fails for some reason
35326 other than file-not-found.
35327 - Don't warn the user when cached-routers.new doesn't exist: that's
35328 perfectly fine when starting up for the first time.
35329 - When EntryNodes are configured, rebuild the guard list to contain,
35330 in order: the EntryNodes that were guards before; the rest of the
35331 EntryNodes; the nodes that were guards before.
35332 - Mask out all signals in sub-threads; only the libevent signal
35333 handler should be processing them. This should prevent some crashes
35334 on some machines using pthreads. (Patch from coderman.)
35335 - Fix switched arguments on memset in the implementation of
35336 tor_munmap() for systems with no mmap() call.
35337 - When Tor receives a router descriptor that it asked for, but
35338 no longer wants (because it has received fresh networkstatuses
35339 in the meantime), do not warn the user. Cache the descriptor if
35340 we're a cache; drop it if we aren't.
35341 - Make earlier entry guards _really_ get retried when the network
35343 - On a malformed DNS reply, always give an error to the corresponding
35345 - Build with recent libevents on platforms that do not define the
35346 nonstandard types "u_int8_t" and friends.
35348 o Minor features (controller):
35349 - Warn the user when an application uses the obsolete binary v0
35350 control protocol. We're planning to remove support for it during
35351 the next development series, so it's good to give people some
35353 - Add STREAM_BW events to report per-entry-stream bandwidth
35354 use. (Patch from Robert Hogan.)
35355 - Rate-limit SIGNEWNYM signals in response to controllers that
35356 impolitely generate them for every single stream. (Patch from
35357 mwenge; closes bug 394.)
35358 - Make REMAP stream events have a SOURCE (cache or exit), and
35359 make them generated in every case where we get a successful
35360 connected or resolved cell.
35362 o Minor bugfixes (performance):
35363 - Call router_have_min_dir_info half as often. (This is showing up in
35364 some profiles, but not others.)
35365 - When using GCC, make log_debug never get called at all, and its
35366 arguments never get evaluated, when no debug logs are configured.
35367 (This is showing up in some profiles, but not others.)
35370 - Remove some never-implemented options. Mark PathlenCoinWeight as
35372 - Implement proposal 106: Stop requiring clients to have well-formed
35373 certificates; stop checking nicknames in certificates. (Clients
35374 have certificates so that they can look like Tor servers, but in
35375 the future we might want to allow them to look like regular TLS
35376 clients instead. Nicknames in certificates serve no purpose other
35377 than making our protocol easier to recognize on the wire.)
35378 - Revise messages on handshake failure again to be even more clear about
35379 which are incoming connections and which are outgoing.
35380 - Discard any v1 directory info that's over 1 month old (for
35381 directories) or over 1 week old (for running-routers lists).
35382 - Do not warn when individual nodes in the configuration's EntryNodes,
35383 ExitNodes, etc are down: warn only when all possible nodes
35384 are down. (Fixes bug 348.)
35385 - Always remove expired routers and networkstatus docs before checking
35386 whether we have enough information to build circuits. (Fixes
35388 - Put a lower-bound on MaxAdvertisedBandwidth.
35391 Changes in version 0.1.2.7-alpha - 2007-02-06
35392 o Major bugfixes (rate limiting):
35393 - Servers decline directory requests much more aggressively when
35394 they're low on bandwidth. Otherwise they end up queueing more and
35395 more directory responses, which can't be good for latency.
35396 - But never refuse directory requests from local addresses.
35397 - Fix a memory leak when sending a 503 response for a networkstatus
35399 - Be willing to read or write on local connections (e.g. controller
35400 connections) even when the global rate limiting buckets are empty.
35401 - If our system clock jumps back in time, don't publish a negative
35402 uptime in the descriptor. Also, don't let the global rate limiting
35403 buckets go absurdly negative.
35404 - Flush local controller connection buffers periodically as we're
35405 writing to them, so we avoid queueing 4+ megabytes of data before
35408 o Major bugfixes (NT services):
35409 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
35410 command-line flag so that admins can override the default by saying
35411 "tor --service install --user "SomeUser"". This will not affect
35412 existing installed services. Also, warn the user that the service
35413 will look for its configuration file in the service user's
35414 %appdata% directory. (We can't do the 'hardwire the user's appdata
35415 directory' trick any more, since we may not have read access to that
35418 o Major bugfixes (other):
35419 - Previously, we would cache up to 16 old networkstatus documents
35420 indefinitely, if they came from nontrusted authorities. Now we
35421 discard them if they are more than 10 days old.
35422 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
35424 - Detect and reject malformed DNS responses containing circular
35426 - If exits are rare enough that we're not marking exits as guards,
35427 ignore exit bandwidth when we're deciding the required bandwidth
35429 - When we're handling a directory connection tunneled over Tor,
35430 don't fill up internal memory buffers with all the data we want
35431 to tunnel; instead, only add it if the OR connection that will
35432 eventually receive it has some room for it. (This can lead to
35433 slowdowns in tunneled dir connections; a better solution will have
35434 to wait for 0.2.0.)
35436 o Minor bugfixes (dns):
35437 - Add some defensive programming to eventdns.c in an attempt to catch
35438 possible memory-stomping bugs.
35439 - Detect and reject DNS replies containing IPv4 or IPv6 records with
35440 an incorrect number of bytes. (Previously, we would ignore the
35442 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
35443 in the correct order, and doesn't crash.
35444 - Free memory held in recently-completed DNS lookup attempts on exit.
35445 This was not a memory leak, but may have been hiding memory leaks.
35446 - Handle TTL values correctly on reverse DNS lookups.
35447 - Treat failure to parse resolv.conf as an error.
35449 o Minor bugfixes (other):
35450 - Fix crash with "tor --list-fingerprint" (reported by seeess).
35451 - When computing clock skew from directory HTTP headers, consider what
35452 time it was when we finished asking for the directory, not what
35454 - Expire socks connections if they spend too long waiting for the
35455 handshake to finish. Previously we would let them sit around for
35456 days, if the connecting application didn't close them either.
35457 - And if the socks handshake hasn't started, don't send a
35458 "DNS resolve socks failed" handshake reply; just close it.
35459 - Stop using C functions that OpenBSD's linker doesn't like.
35460 - Don't launch requests for descriptors unless we have networkstatuses
35461 from at least half of the authorities. This delays the first
35462 download slightly under pathological circumstances, but can prevent
35463 us from downloading a bunch of descriptors we don't need.
35464 - Do not log IPs with TLS failures for incoming TLS
35465 connections. (Fixes bug 382.)
35466 - If the user asks to use invalid exit nodes, be willing to use
35468 - Stop using the reserved ac_cv namespace in our configure script.
35469 - Call stat() slightly less often; use fstat() when possible.
35470 - Refactor the way we handle pending circuits when an OR connection
35471 completes or fails, in an attempt to fix a rare crash bug.
35472 - Only rewrite a conn's address based on X-Forwarded-For: headers
35473 if it's a parseable public IP address; and stop adding extra quotes
35474 to the resulting address.
35477 - Weight directory requests by advertised bandwidth. Now we can
35478 let servers enable write limiting but still allow most clients to
35479 succeed at their directory requests. (We still ignore weights when
35480 choosing a directory authority; I hope this is a feature.)
35483 - Create a new file ReleaseNotes which was the old ChangeLog. The
35484 new ChangeLog file now includes the summaries for all development
35486 - Check for addresses with invalid characters at the exit as well
35487 as at the client, and warn less verbosely when they fail. You can
35488 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
35489 - Adapt a patch from goodell to let the contrib/exitlist script
35490 take arguments rather than require direct editing.
35491 - Inform the server operator when we decide not to advertise a
35492 DirPort due to AccountingMax enabled or a low BandwidthRate. It
35493 was confusing Zax, so now we're hopefully more helpful.
35494 - Bring us one step closer to being able to establish an encrypted
35495 directory tunnel without knowing a descriptor first. Still not
35496 ready yet. As part of the change, now assume we can use a
35497 create_fast cell if we don't know anything about a router.
35498 - Allow exit nodes to use nameservers running on ports other than 53.
35499 - Servers now cache reverse DNS replies.
35500 - Add an --ignore-missing-torrc command-line option so that we can
35501 get the "use sensible defaults if the configuration file doesn't
35502 exist" behavior even when specifying a torrc location on the command
35505 o Minor features (controller):
35506 - Track reasons for OR connection failure; make these reasons
35507 available via the controller interface. (Patch from Mike Perry.)
35508 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
35509 can learn when clients are sending malformed hostnames to Tor.
35510 - Clean up documentation for controller status events.
35511 - Add a REMAP status to stream events to note that a stream's
35512 address has changed because of a cached address or a MapAddress
35516 Changes in version 0.1.2.6-alpha - 2007-01-09
35518 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
35519 connection handles more than 4 gigs in either direction, we crash.
35520 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
35521 advertised exit node, somebody might try to exit from us when
35522 we're bootstrapping and before we've built our descriptor yet.
35523 Refuse the connection rather than crashing.
35526 - Warn if we (as a server) find that we've resolved an address that we
35527 weren't planning to resolve.
35528 - Warn that using select() on any libevent version before 1.1 will be
35529 unnecessarily slow (even for select()).
35530 - Flush ERR-level controller status events just like we currently
35531 flush ERR-level log events, so that a Tor shutdown doesn't prevent
35532 the controller from learning about current events.
35534 o Minor features (more controller status events):
35535 - Implement EXTERNAL_ADDRESS server status event so controllers can
35536 learn when our address changes.
35537 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
35538 can learn when directories reject our descriptor.
35539 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
35540 can learn when a client application is speaking a non-socks protocol
35542 - Implement DANGEROUS_SOCKS client status event so controllers
35543 can learn when a client application is leaking DNS addresses.
35544 - Implement BUG general status event so controllers can learn when
35545 Tor is unhappy about its internal invariants.
35546 - Implement CLOCK_SKEW general status event so controllers can learn
35547 when Tor thinks the system clock is set incorrectly.
35548 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
35549 server status events so controllers can learn when their descriptors
35550 are accepted by a directory.
35551 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
35552 server status events so controllers can learn about Tor's progress in
35553 deciding whether it's reachable from the outside.
35554 - Implement BAD_LIBEVENT general status event so controllers can learn
35555 when we have a version/method combination in libevent that needs to
35557 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
35558 and DNS_USELESS server status events so controllers can learn
35559 about changes to DNS server status.
35561 o Minor features (directory):
35562 - Authorities no longer recommend exits as guards if this would shift
35563 too much load to the exit nodes.
35566 Changes in version 0.1.2.5-alpha - 2007-01-06
35568 - Enable write limiting as well as read limiting. Now we sacrifice
35569 capacity if we're pushing out lots of directory traffic, rather
35570 than overrunning the user's intended bandwidth limits.
35571 - Include TLS overhead when counting bandwidth usage; previously, we
35572 would count only the bytes sent over TLS, but not the bytes used
35574 - Support running the Tor service with a torrc not in the same
35575 directory as tor.exe and default to using the torrc located in
35576 the %appdata%\Tor\ of the user who installed the service. Patch
35578 - Servers now check for the case when common DNS requests are going to
35579 wildcarded addresses (i.e. all getting the same answer), and change
35580 their exit policy to reject *:* if it's happening.
35581 - Implement BEGIN_DIR cells, so we can connect to the directory
35582 server via TLS to do encrypted directory requests rather than
35583 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
35584 config options if you like.
35586 o Minor features (config and docs):
35587 - Start using the state file to store bandwidth accounting data:
35588 the bw_accounting file is now obsolete. We'll keep generating it
35589 for a while for people who are still using 0.1.2.4-alpha.
35590 - Try to batch changes to the state file so that we do as few
35591 disk writes as possible while still storing important things in
35593 - The state file and the bw_accounting file get saved less often when
35594 the AvoidDiskWrites config option is set.
35595 - Make PIDFile work on Windows (untested).
35596 - Add internal descriptions for a bunch of configuration options:
35597 accessible via controller interface and in comments in saved
35599 - Reject *:563 (NNTPS) in the default exit policy. We already reject
35600 NNTP by default, so this seems like a sensible addition.
35601 - Clients now reject hostnames with invalid characters. This should
35602 avoid some inadvertent info leaks. Add an option
35603 AllowNonRFC953Hostnames to disable this behavior, in case somebody
35604 is running a private network with hosts called @, !, and #.
35605 - Add a maintainer script to tell us which options are missing
35606 documentation: "make check-docs".
35607 - Add a new address-spec.txt document to describe our special-case
35608 addresses: .exit, .onion, and .noconnnect.
35610 o Minor features (DNS):
35611 - Ongoing work on eventdns infrastructure: now it has dns server
35612 and ipv6 support. One day Tor will make use of it.
35613 - Add client-side caching for reverse DNS lookups.
35614 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
35615 - When we change nameservers or IP addresses, reset and re-launch
35616 our tests for DNS hijacking.
35618 o Minor features (directory):
35619 - Authorities now specify server versions in networkstatus. This adds
35620 about 2% to the size of compressed networkstatus docs, and allows
35621 clients to tell which servers support BEGIN_DIR and which don't.
35622 The implementation is forward-compatible with a proposed future
35623 protocol version scheme not tied to Tor versions.
35624 - DirServer configuration lines now have an orport= option so
35625 clients can open encrypted tunnels to the authorities without
35626 having downloaded their descriptors yet. Enabled for moria1,
35627 moria2, tor26, and lefkada now in the default configuration.
35628 - Directory servers are more willing to send a 503 "busy" if they
35629 are near their write limit, especially for v1 directory requests.
35630 Now they can use their limited bandwidth for actual Tor traffic.
35631 - Clients track responses with status 503 from dirservers. After a
35632 dirserver has given us a 503, we try not to use it until an hour has
35633 gone by, or until we have no dirservers that haven't given us a 503.
35634 - When we get a 503 from a directory, and we're not a server, we don't
35635 count the failure against the total number of failures allowed
35636 for the thing we're trying to download.
35637 - Report X-Your-Address-Is correctly from tunneled directory
35638 connections; don't report X-Your-Address-Is when it's an internal
35639 address; and never believe reported remote addresses when they're
35641 - Protect against an unlikely DoS attack on directory servers.
35642 - Add a BadDirectory flag to network status docs so that authorities
35643 can (eventually) tell clients about caches they believe to be
35646 o Minor features (controller):
35647 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
35648 - Reimplement GETINFO so that info/names stays in sync with the
35650 - Implement "GETINFO fingerprint".
35651 - Implement "SETEVENTS GUARD" so controllers can get updates on
35652 entry guard status as it changes.
35654 o Minor features (clean up obsolete pieces):
35655 - Remove some options that have been deprecated since at least
35656 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
35657 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
35658 to set log options.
35659 - We no longer look for identity and onion keys in "identity.key" and
35660 "onion.key" -- these were replaced by secret_id_key and
35661 secret_onion_key in 0.0.8pre1.
35662 - We no longer require unrecognized directory entries to be
35665 o Major bugfixes (security):
35666 - Stop sending the HttpProxyAuthenticator string to directory
35667 servers when directory connections are tunnelled through Tor.
35668 - Clients no longer store bandwidth history in the state file.
35669 - Do not log introduction points for hidden services if SafeLogging
35671 - When generating bandwidth history, round down to the nearest
35672 1k. When storing accounting data, round up to the nearest 1k.
35673 - When we're running as a server, remember when we last rotated onion
35674 keys, so that we will rotate keys once they're a week old even if
35675 we never stay up for a week ourselves.
35677 o Major bugfixes (other):
35678 - Fix a longstanding bug in eventdns that prevented the count of
35679 timed-out resolves from ever being reset. This bug caused us to
35680 give up on a nameserver the third time it timed out, and try it
35681 10 seconds later... and to give up on it every time it timed out
35683 - Take out the '5 second' timeout from the connection retry
35684 schedule. Now the first connect attempt will wait a full 10
35685 seconds before switching to a new circuit. Perhaps this will help
35686 a lot. Based on observations from Mike Perry.
35687 - Fix a bug on the Windows implementation of tor_mmap_file() that
35688 would prevent the cached-routers file from ever loading. Reported
35692 - Fix an assert failure when a directory authority sets
35693 AuthDirRejectUnlisted and then receives a descriptor from an
35694 unlisted router. Reported by seeess.
35695 - Avoid a double-free when parsing malformed DirServer lines.
35696 - Fix a bug when a BSD-style PF socket is first used. Patch from
35698 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
35699 to resolve an address at a given exit node even when they ask for
35701 - Servers no longer ever list themselves in their "family" line,
35702 even if configured to do so. This makes it easier to configure
35703 family lists conveniently.
35704 - When running as a server, don't fall back to 127.0.0.1 when no
35705 nameservers are configured in /etc/resolv.conf; instead, make the
35706 user fix resolv.conf or specify nameservers explicitly. (Resolves
35708 - Stop accepting certain malformed ports in configured exit policies.
35709 - Don't re-write the fingerprint file every restart, unless it has
35711 - Stop warning when a single nameserver fails: only warn when _all_ of
35712 our nameservers have failed. Also, when we only have one nameserver,
35713 raise the threshold for deciding that the nameserver is dead.
35714 - Directory authorities now only decide that routers are reachable
35715 if their identity keys are as expected.
35716 - When the user uses bad syntax in the Log config line, stop
35717 suggesting other bad syntax as a replacement.
35718 - Correctly detect ipv6 DNS capability on OpenBSD.
35720 o Minor bugfixes (controller):
35721 - Report the circuit number correctly in STREAM CLOSED events. Bug
35722 reported by Mike Perry.
35723 - Do not report bizarre values for results of accounting GETINFOs
35724 when the last second's write or read exceeds the allotted bandwidth.
35725 - Report "unrecognized key" rather than an empty string when the
35726 controller tries to fetch a networkstatus that doesn't exist.
35729 Changes in version 0.1.1.26 - 2006-12-14
35730 o Security bugfixes:
35731 - Stop sending the HttpProxyAuthenticator string to directory
35732 servers when directory connections are tunnelled through Tor.
35733 - Clients no longer store bandwidth history in the state file.
35734 - Do not log introduction points for hidden services if SafeLogging
35738 - Fix an assert failure when a directory authority sets
35739 AuthDirRejectUnlisted and then receives a descriptor from an
35740 unlisted router (reported by seeess).
35743 Changes in version 0.1.2.4-alpha - 2006-12-03
35745 - Add support for using natd; this allows FreeBSDs earlier than
35746 5.1.2 to have ipfw send connections through Tor without using
35747 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
35750 - Make all connections to addresses of the form ".noconnect"
35751 immediately get closed. This lets application/controller combos
35752 successfully test whether they're talking to the same Tor by
35753 watching for STREAM events.
35754 - Make cross.sh cross-compilation script work even when autogen.sh
35755 hasn't been run. (Patch from Michael Mohr.)
35756 - Statistics dumped by -USR2 now include a breakdown of public key
35757 operations, for profiling.
35760 - Fix a major leak when directory authorities parse their
35761 approved-routers list, a minor memory leak when we fail to pick
35762 an exit node, and a few rare leaks on errors.
35763 - Handle TransPort connections even when the server sends data before
35764 the client sends data. Previously, the connection would just hang
35765 until the client sent data. (Patch from tup based on patch from
35767 - Avoid assert failure when our cached-routers file is empty on
35771 - Don't log spurious warnings when we see a circuit close reason we
35772 don't recognize; it's probably just from a newer version of Tor.
35773 - Have directory authorities allow larger amounts of drift in uptime
35774 without replacing the server descriptor: previously, a server that
35775 restarted every 30 minutes could have 48 "interesting" descriptors
35777 - Start linking to the Tor specification and Tor reference manual
35778 correctly in the Windows installer.
35779 - Add Vidalia to the OS X uninstaller script, so when we uninstall
35780 Tor/Privoxy we also uninstall Vidalia.
35781 - Resume building on Irix64, and fix a lot of warnings from its
35782 MIPSpro C compiler.
35783 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
35784 when we're running as a client.
35787 Changes in version 0.1.1.25 - 2006-11-04
35789 - When a client asks us to resolve (rather than connect to)
35790 an address, and we have a cached answer, give them the cached
35791 answer. Previously, we would give them no answer at all.
35792 - We were building exactly the wrong circuits when we predict
35793 hidden service requirements, meaning Tor would have to build all
35794 its circuits on demand.
35795 - If none of our live entry guards have a high uptime, but we
35796 require a guard with a high uptime, try adding a new guard before
35797 we give up on the requirement. This patch should make long-lived
35798 connections more stable on average.
35799 - When testing reachability of our DirPort, don't launch new
35800 tests when there's already one in progress -- unreachable
35801 servers were stacking up dozens of testing streams.
35803 o Security bugfixes:
35804 - When the user sends a NEWNYM signal, clear the client-side DNS
35805 cache too. Otherwise we continue to act on previous information.
35808 - Avoid a memory corruption bug when creating a hash table for
35810 - Avoid possibility of controller-triggered crash when misusing
35811 certain commands from a v0 controller on platforms that do not
35812 handle printf("%s",NULL) gracefully.
35813 - Avoid infinite loop on unexpected controller input.
35814 - Don't log spurious warnings when we see a circuit close reason we
35815 don't recognize; it's probably just from a newer version of Tor.
35816 - Add Vidalia to the OS X uninstaller script, so when we uninstall
35817 Tor/Privoxy we also uninstall Vidalia.
35820 Changes in version 0.1.2.3-alpha - 2006-10-29
35822 - Prepare for servers to publish descriptors less often: never
35823 discard a descriptor simply for being too old until either it is
35824 recommended by no authorities, or until we get a better one for
35825 the same router. Make caches consider retaining old recommended
35826 routers for even longer.
35827 - If most authorities set a BadExit flag for a server, clients
35828 don't think of it as a general-purpose exit. Clients only consider
35829 authorities that advertise themselves as listing bad exits.
35830 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
35831 headers for content, so that we can work better in the presence of
35832 caching HTTP proxies.
35833 - Allow authorities to list nodes as bad exits by fingerprint or by
35836 o Minor features, controller:
35837 - Add a REASON field to CIRC events; for backward compatibility, this
35838 field is sent only to controllers that have enabled the extended
35839 event format. Also, add additional reason codes to explain why
35840 a given circuit has been destroyed or truncated. (Patches from
35842 - Add a REMOTE_REASON field to extended CIRC events to tell the
35843 controller about why a remote OR told us to close a circuit.
35844 - Stream events also now have REASON and REMOTE_REASON fields,
35845 working much like those for circuit events.
35846 - There's now a GETINFO ns/... field so that controllers can ask Tor
35847 about the current status of a router.
35848 - A new event type "NS" to inform a controller when our opinion of
35849 a router's status has changed.
35850 - Add a GETINFO events/names and GETINFO features/names so controllers
35851 can tell which events and features are supported.
35852 - A new CLEARDNSCACHE signal to allow controllers to clear the
35853 client-side DNS cache without expiring circuits.
35855 o Security bugfixes:
35856 - When the user sends a NEWNYM signal, clear the client-side DNS
35857 cache too. Otherwise we continue to act on previous information.
35860 - Avoid sending junk to controllers or segfaulting when a controller
35861 uses EVENT_NEW_DESC with verbose nicknames.
35862 - Stop triggering asserts if the controller tries to extend hidden
35863 service circuits (reported by mwenge).
35864 - Avoid infinite loop on unexpected controller input.
35865 - When the controller does a "GETINFO network-status", tell it
35866 about even those routers whose descriptors are very old, and use
35867 long nicknames where appropriate.
35868 - Change NT service functions to be loaded on demand. This lets us
35869 build with MinGW without breaking Tor for Windows 98 users.
35870 - Do DirPort reachability tests less often, since a single test
35871 chews through many circuits before giving up.
35872 - In the hidden service example in torrc.sample, stop recommending
35873 esoteric and discouraged hidden service options.
35874 - When stopping an NT service, wait up to 10 sec for it to actually
35875 stop. Patch from Matt Edman; resolves bug 295.
35876 - Fix handling of verbose nicknames with ORCONN controller events:
35877 make them show up exactly when requested, rather than exactly when
35879 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
35880 printing a duplicate "$" in the keys we send (reported by mwenge).
35881 - Correctly set maximum connection limit on Cygwin. (This time
35883 - Try to detect Windows correctly when cross-compiling.
35884 - Detect the size of the routers file correctly even if it is
35885 corrupted (on systems without mmap) or not page-aligned (on systems
35886 with mmap). This bug was harmless.
35887 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
35888 to open a stream fails; now we do in more cases. This should
35889 make clients able to find a good exit faster in some cases, since
35890 unhandleable requests will now get an error rather than timing out.
35891 - Resolve two memory leaks when rebuilding the on-disk router cache
35892 (reported by fookoowa).
35893 - Clean up minor code warnings suggested by the MIPSpro C compiler,
35894 and reported by some Centos users.
35895 - Controller signals now work on non-Unix platforms that don't define
35896 SIGUSR1 and SIGUSR2 the way we expect.
35897 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
35898 values before failing, and always enables eventdns.
35899 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
35900 Try to fix this in configure.in by checking for most functions
35901 before we check for libevent.
35904 Changes in version 0.1.2.2-alpha - 2006-10-07
35906 - Make our async eventdns library on-by-default for Tor servers,
35907 and plan to deprecate the separate dnsworker threads.
35908 - Add server-side support for "reverse" DNS lookups (using PTR
35909 records so clients can determine the canonical hostname for a given
35910 IPv4 address). Only supported by servers using eventdns; servers
35911 now announce in their descriptors whether they support eventdns.
35912 - Specify and implement client-side SOCKS5 interface for reverse DNS
35913 lookups (see doc/socks-extensions.txt).
35914 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
35915 connect to directory servers through Tor. Previously, clients needed
35916 to find Tor exits to make private connections to directory servers.
35917 - Avoid choosing Exit nodes for entry or middle hops when the
35918 total bandwidth available from non-Exit nodes is much higher than
35919 the total bandwidth available from Exit nodes.
35920 - Workaround for name servers (like Earthlink's) that hijack failing
35921 DNS requests and replace the no-such-server answer with a "helpful"
35922 redirect to an advertising-driven search portal. Also work around
35923 DNS hijackers who "helpfully" decline to hijack known-invalid
35924 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
35925 lets you turn it off.
35926 - Send out a burst of long-range padding cells once we've established
35927 that we're reachable. Spread them over 4 circuits, so hopefully
35928 a few will be fast. This exercises our bandwidth and bootstraps
35929 us into the directory more quickly.
35931 o New/improved config options:
35932 - Add new config option "ResolvConf" to let the server operator
35933 choose an alternate resolve.conf file when using eventdns.
35934 - Add an "EnforceDistinctSubnets" option to control our "exclude
35935 servers on the same /16" behavior. It's still on by default; this
35936 is mostly for people who want to operate private test networks with
35937 all the machines on the same subnet.
35938 - If one of our entry guards is on the ExcludeNodes list, or the
35939 directory authorities don't think it's a good guard, treat it as
35940 if it were unlisted: stop using it as a guard, and throw it off
35941 the guards list if it stays that way for a long time.
35942 - Allow directory authorities to be marked separately as authorities
35943 for the v1 directory protocol, the v2 directory protocol, and
35944 as hidden service directories, to make it easier to retire old
35945 authorities. V1 authorities should set "HSAuthoritativeDir 1"
35946 to continue being hidden service authorities too.
35947 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
35949 o Minor features, controller:
35950 - Fix CIRC controller events so that controllers can learn the
35951 identity digests of non-Named servers used in circuit paths.
35952 - Let controllers ask for more useful identifiers for servers. Instead
35953 of learning identity digests for un-Named servers and nicknames
35954 for Named servers, the new identifiers include digest, nickname,
35955 and indication of Named status. Off by default; see control-spec.txt
35956 for more information.
35957 - Add a "getinfo address" controller command so it can display Tor's
35958 best guess to the user.
35959 - New controller event to alert the controller when our server
35960 descriptor has changed.
35961 - Give more meaningful errors on controller authentication failure.
35963 o Minor features, other:
35964 - When asked to resolve a hostname, don't use non-exit servers unless
35965 requested to do so. This allows servers with broken DNS to be
35966 useful to the network.
35967 - Divide eventdns log messages into warn and info messages.
35968 - Reserve the nickname "Unnamed" for routers that can't pick
35969 a hostname: any router can call itself Unnamed; directory
35970 authorities will never allocate Unnamed to any particular router;
35971 clients won't believe that any router is the canonical Unnamed.
35972 - Only include function names in log messages for info/debug messages.
35973 For notice/warn/err, the content of the message should be clear on
35974 its own, and printing the function name only confuses users.
35975 - Avoid some false positives during reachability testing: don't try
35976 to test via a server that's on the same /24 as us.
35977 - If we fail to build a circuit to an intended enclave, and it's
35978 not mandatory that we use that enclave, stop wanting it.
35979 - When eventdns is enabled, allow multithreaded builds on NetBSD and
35980 OpenBSD. (We had previously disabled threads on these platforms
35981 because they didn't have working thread-safe resolver functions.)
35983 o Major bugfixes, anonymity/security:
35984 - If a client asked for a server by name, and there's a named server
35985 in our network-status but we don't have its descriptor yet, we
35986 could return an unnamed server instead.
35987 - Fix NetBSD bug that could allow someone to force uninitialized RAM
35988 to be sent to a server's DNS resolver. This only affects NetBSD
35989 and other platforms that do not bounds-check tolower().
35990 - Reject (most) attempts to use Tor circuits with length one. (If
35991 many people start using Tor as a one-hop proxy, exit nodes become
35992 a more attractive target for compromise.)
35993 - Just because your DirPort is open doesn't mean people should be
35994 able to remotely teach you about hidden service descriptors. Now
35995 only accept rendezvous posts if you've got HSAuthoritativeDir set.
35997 o Major bugfixes, other:
35998 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
35999 - When a client asks the server to resolve (not connect to)
36000 an address, and it has a cached answer, give them the cached answer.
36001 Previously, the server would give them no answer at all.
36002 - Allow really slow clients to not hang up five minutes into their
36003 directory downloads (suggested by Adam J. Richter).
36004 - We were building exactly the wrong circuits when we anticipated
36005 hidden service requirements, meaning Tor would have to build all
36006 its circuits on demand.
36007 - Avoid crashing when we mmap a router cache file of size 0.
36008 - When testing reachability of our DirPort, don't launch new
36009 tests when there's already one in progress -- unreachable
36010 servers were stacking up dozens of testing streams.
36012 o Minor bugfixes, correctness:
36013 - If we're a directory mirror and we ask for "all" network status
36014 documents, we would discard status documents from authorities
36015 we don't recognize.
36016 - Avoid a memory corruption bug when creating a hash table for
36018 - Avoid controller-triggered crash when misusing certain commands
36019 from a v0 controller on platforms that do not handle
36020 printf("%s",NULL) gracefully.
36021 - Don't crash when a controller sends a third argument to an
36022 "extendcircuit" request.
36023 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
36024 response; fix error code when "getinfo dir/status/" fails.
36025 - Avoid crash when telling controller stream-status and a stream
36027 - Patch from Adam Langley to fix assert() in eventdns.c.
36028 - Fix a debug log message in eventdns to say "X resolved to Y"
36029 instead of "X resolved to X".
36030 - Make eventdns give strings for DNS errors, not just error numbers.
36031 - Track unreachable entry guards correctly: don't conflate
36032 'unreachable by us right now' with 'listed as down by the directory
36033 authorities'. With the old code, if a guard was unreachable by
36034 us but listed as running, it would clog our guard list forever.
36035 - Behave correctly in case we ever have a network with more than
36036 2GB/s total advertised capacity.
36037 - Make TrackExitHosts case-insensitive, and fix the behavior of
36038 ".suffix" TrackExitHosts items to avoid matching in the middle of
36040 - Finally fix the openssl warnings from newer gccs that believe that
36041 ignoring a return value is okay, but casting a return value and
36042 then ignoring it is a sign of madness.
36043 - Prevent the contrib/exitlist script from printing the same
36044 result more than once.
36045 - Patch from Steve Hildrey: Generate network status correctly on
36046 non-versioning dirservers.
36047 - Don't listen to the X-Your-Address-Is hint if you did the lookup
36048 via Tor; otherwise you'll think you're the exit node's IP address.
36050 o Minor bugfixes, performance:
36051 - Two small performance improvements on parsing descriptors.
36052 - Major performance improvement on inserting descriptors: change
36053 algorithm from O(n^2) to O(n).
36054 - Make the common memory allocation path faster on machines where
36055 malloc(0) returns a pointer.
36056 - Start remembering X-Your-Address-Is directory hints even if you're
36057 a client, so you can become a server more smoothly.
36058 - Avoid duplicate entries on MyFamily line in server descriptor.
36060 o Packaging, features:
36061 - Remove architecture from OS X builds. The official builds are
36062 now universal binaries.
36063 - The Debian package now uses --verify-config when (re)starting,
36064 to distinguish configuration errors from other errors.
36065 - Update RPMs to require libevent 1.1b.
36067 o Packaging, bugfixes:
36068 - Patches so Tor builds with MinGW on Windows.
36069 - Patches so Tor might run on Cygwin again.
36070 - Resume building on non-gcc compilers and ancient gcc. Resume
36071 building with the -O0 compile flag. Resume building cleanly on
36073 - Run correctly on OS X platforms with case-sensitive filesystems.
36074 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
36075 - Add autoconf checks so Tor can build on Solaris x86 again.
36078 - Documented (and renamed) ServerDNSSearchDomains and
36079 ServerDNSResolvConfFile options.
36080 - Be clearer that the *ListenAddress directives can be repeated
36084 Changes in version 0.1.1.24 - 2006-09-29
36086 - Allow really slow clients to not hang up five minutes into their
36087 directory downloads (suggested by Adam J. Richter).
36088 - Fix major performance regression from 0.1.0.x: instead of checking
36089 whether we have enough directory information every time we want to
36090 do something, only check when the directory information has changed.
36091 This should improve client CPU usage by 25-50%.
36092 - Don't crash if, after a server has been running for a while,
36093 it can't resolve its hostname.
36096 - Allow Tor to start when RunAsDaemon is set but no logs are set.
36097 - Don't crash when the controller receives a third argument to an
36098 "extendcircuit" request.
36099 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
36100 response; fix error code when "getinfo dir/status/" fails.
36101 - Fix configure.in to not produce broken configure files with
36102 more recent versions of autoconf. Thanks to Clint for his auto*
36104 - Fix security bug on NetBSD that could allow someone to force
36105 uninitialized RAM to be sent to a server's DNS resolver. This
36106 only affects NetBSD and other platforms that do not bounds-check
36108 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
36109 methods: these are known to be buggy.
36110 - If we're a directory mirror and we ask for "all" network status
36111 documents, we would discard status documents from authorities
36112 we don't recognize.
36115 Changes in version 0.1.2.1-alpha - 2006-08-27
36117 - Add "eventdns" async dns library from Adam Langley, tweaked to
36118 build on OSX and Windows. Only enabled if you pass the
36119 --enable-eventdns argument to configure.
36120 - Allow servers with no hostname or IP address to learn their
36121 IP address by asking the directory authorities. This code only
36122 kicks in when you would normally have exited with a "no address"
36123 error. Nothing's authenticated, so use with care.
36124 - Rather than waiting a fixed amount of time between retrying
36125 application connections, we wait only 5 seconds for the first,
36126 10 seconds for the second, and 15 seconds for each retry after
36127 that. Hopefully this will improve the expected user experience.
36128 - Patch from Tup to add support for transparent AP connections:
36129 this basically bundles the functionality of trans-proxy-tor
36130 into the Tor mainline. Now hosts with compliant pf/netfilter
36131 implementations can redirect TCP connections straight to Tor
36132 without diverting through SOCKS. Needs docs.
36133 - Busy directory servers save lots of memory by spooling server
36134 descriptors, v1 directories, and v2 networkstatus docs to buffers
36135 as needed rather than en masse. Also mmap the cached-routers
36136 files, so we don't need to keep the whole thing in memory too.
36137 - Automatically avoid picking more than one node from the same
36138 /16 network when constructing a circuit.
36139 - Revise and clean up the torrc.sample that we ship with; add
36140 a section for BandwidthRate and BandwidthBurst.
36143 - Split circuit_t into origin_circuit_t and or_circuit_t, and
36144 split connection_t into edge, or, dir, control, and base structs.
36145 These will save quite a bit of memory on busy servers, and they'll
36146 also help us track down bugs in the code and bugs in the spec.
36147 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
36148 or later. Log when we are doing this, so we can diagnose it when
36149 it fails. (Also, recommend libevent 1.1b for kqueue and
36150 win32 methods; deprecate libevent 1.0b harder; make libevent
36151 recommendation system saner.)
36152 - Start being able to build universal binaries on OS X (thanks
36154 - Export the default exit policy via the control port, so controllers
36155 don't need to guess what it is / will be later.
36156 - Add a man page entry for ProtocolWarnings.
36157 - Add TestVia config option to the man page.
36158 - Remove even more protocol-related warnings from Tor server logs,
36159 such as bad TLS handshakes and malformed begin cells.
36160 - Stop fetching descriptors if you're not a dir mirror and you
36161 haven't tried to establish any circuits lately. [This currently
36162 causes some dangerous behavior, because when you start up again
36163 you'll use your ancient server descriptors.]
36164 - New DirPort behavior: if you have your dirport set, you download
36165 descriptors aggressively like a directory mirror, whether or not
36166 your ORPort is set.
36167 - Get rid of the router_retry_connections notion. Now routers
36168 no longer try to rebuild long-term connections to directory
36169 authorities, and directory authorities no longer try to rebuild
36170 long-term connections to all servers. We still don't hang up
36171 connections in these two cases though -- we need to look at it
36172 more carefully to avoid flapping, and we likely need to wait til
36173 0.1.1.x is obsolete.
36174 - Drop compatibility with obsolete Tors that permit create cells
36175 to have the wrong circ_id_type.
36176 - Re-enable per-connection rate limiting. Get rid of the "OP
36177 bandwidth" concept. Lay groundwork for "bandwidth classes" --
36178 separate global buckets that apply depending on what sort of conn
36180 - Start publishing one minute or so after we find our ORPort
36181 to be reachable. This will help reduce the number of descriptors
36182 we have for ourselves floating around, since it's quite likely
36183 other things (e.g. DirPort) will change during that minute too.
36184 - Fork the v1 directory protocol into its own spec document,
36185 and mark dir-spec.txt as the currently correct (v2) spec.
36188 - When we find our DirPort to be reachable, publish a new descriptor
36189 so we'll tell the world (reported by pnx).
36190 - Publish a new descriptor after we hup/reload. This is important
36191 if our config has changed such that we'll want to start advertising
36192 our DirPort now, etc.
36193 - Allow Tor to start when RunAsDaemon is set but no logs are set.
36194 - When we have a state file we cannot parse, tell the user and
36195 move it aside. Now we avoid situations where the user starts
36196 Tor in 1904, Tor writes a state file with that timestamp in it,
36197 the user fixes her clock, and Tor refuses to start.
36198 - Fix configure.in to not produce broken configure files with
36199 more recent versions of autoconf. Thanks to Clint for his auto*
36201 - "tor --verify-config" now exits with -1(255) or 0 depending on
36202 whether the config options are bad or good.
36203 - Resolve bug 321 when using dnsworkers: append a period to every
36204 address we resolve at the exit node, so that we do not accidentally
36205 pick up local addresses, and so that failing searches are retried
36206 in the resolver search domains. (This is already solved for
36207 eventdns.) (This breaks Blossom servers for now.)
36208 - If we are using an exit enclave and we can't connect, e.g. because
36209 its webserver is misconfigured to not listen on localhost, then
36210 back off and try connecting from somewhere else before we fail.
36213 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
36214 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
36215 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
36216 when the IP address is mapped through MapAddress to a hostname.
36217 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
36218 useless IPv6 DNS resolves.
36219 - Patch suggested by Karsten Loesing: respond to SIGNAL command
36220 before we execute the signal, in case the signal shuts us down.
36221 - Clean up AllowInvalidNodes man page entry.
36222 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
36223 - Add more asserts to track down an assert error on a windows Tor
36224 server with connection_add being called with socket == -1.
36225 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
36226 - Fix misleading log messages: an entry guard that is "unlisted",
36227 as well as not known to be "down" (because we've never heard
36228 of it), is not therefore "up".
36229 - Remove code to special-case "-cvs" ending, since it has not
36230 actually mattered since 0.0.9.
36231 - Make our socks5 handling more robust to broken socks clients:
36232 throw out everything waiting on the buffer in between socks
36233 handshake phases, since they can't possibly (so the theory
36234 goes) have predicted what we plan to respond to them.
36237 Changes in version 0.1.1.23 - 2006-07-30
36239 - Fast Tor servers, especially exit nodes, were triggering asserts
36240 due to a bug in handling the list of pending DNS resolves. Some
36241 bugs still remain here; we're hunting them.
36242 - Entry guards could crash clients by sending unexpected input.
36243 - More fixes on reachability testing: if you find yourself reachable,
36244 then don't ever make any client requests (so you stop predicting
36245 circuits), then hup or have your clock jump, then later your IP
36246 changes, you won't think circuits are working, so you won't try to
36247 test reachability, so you won't publish.
36250 - Avoid a crash if the controller does a resetconf firewallports
36251 and then a setconf fascistfirewall=1.
36252 - Avoid an integer underflow when the dir authority decides whether
36253 a router is stable: we might wrongly label it stable, and compute
36254 a slightly wrong median stability, when a descriptor is published
36256 - Fix a place where we might trigger an assert if we can't build our
36257 own server descriptor yet.
36260 Changes in version 0.1.1.22 - 2006-07-05
36262 - Fix a big bug that was causing servers to not find themselves
36263 reachable if they changed IP addresses. Since only 0.1.1.22+
36264 servers can do reachability testing correctly, now we automatically
36265 make sure to test via one of these.
36266 - Fix to allow clients and mirrors to learn directory info from
36267 descriptor downloads that get cut off partway through.
36268 - Directory authorities had a bug in deciding if a newly published
36269 descriptor was novel enough to make everybody want a copy -- a few
36270 servers seem to be publishing new descriptors many times a minute.
36272 - Fix a rare bug that was causing some servers to complain about
36273 "closing wedged cpuworkers" and skip some circuit create requests.
36274 - Make the Exit flag in directory status documents actually work.
36277 Changes in version 0.1.1.21 - 2006-06-10
36278 o Crash and assert fixes from 0.1.1.20:
36279 - Fix a rare crash on Tor servers that have enabled hibernation.
36280 - Fix a seg fault on startup for Tor networks that use only one
36281 directory authority.
36282 - Fix an assert from a race condition that occurs on Tor servers
36283 while exiting, where various threads are trying to log that they're
36284 exiting, and delete the logs, at the same time.
36285 - Make our unit tests pass again on certain obscure platforms.
36288 - Add support for building SUSE RPM packages.
36289 - Speed up initial bootstrapping for clients: if we are making our
36290 first ever connection to any entry guard, then don't mark it down
36292 - When only one Tor server in the network is labelled as a guard,
36293 and we've already picked him, we would cycle endlessly picking him
36294 again, being unhappy about it, etc. Now we specifically exclude
36295 current guards when picking a new guard.
36296 - Servers send create cells more reliably after the TLS connection
36297 is established: we were sometimes forgetting to send half of them
36298 when we had more than one pending.
36299 - If we get a create cell that asks us to extend somewhere, but the
36300 Tor server there doesn't match the expected digest, we now send
36301 a destroy cell back, rather than silently doing nothing.
36302 - Make options->RedirectExit work again.
36303 - Make cookie authentication for the controller work again.
36304 - Stop being picky about unusual characters in the arguments to
36305 mapaddress. It's none of our business.
36306 - Add a new config option "TestVia" that lets you specify preferred
36307 middle hops to use for test circuits. Perhaps this will let me
36308 debug the reachability problems better.
36310 o Log / documentation fixes:
36311 - If we're a server and some peer has a broken TLS certificate, don't
36312 log about it unless ProtocolWarnings is set, i.e., we want to hear
36313 about protocol violations by others.
36314 - Fix spelling of VirtualAddrNetwork in man page.
36315 - Add a better explanation at the top of the autogenerated torrc file
36316 about what happened to our old torrc.
36319 Changes in version 0.1.1.20 - 2006-05-23
36321 - Downgrade a log severity where servers complain that they're
36323 - Avoid a compile warning on FreeBSD.
36324 - Remove string size limit on NEWDESC messages; solve bug 291.
36325 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
36326 more thoroughly when we're running on windows.
36329 Changes in version 0.1.1.19-rc - 2006-05-03
36331 - Regenerate our local descriptor if it's dirty and we try to use
36332 it locally (e.g. if it changes during reachability detection).
36333 - If we setconf our ORPort to 0, we continued to listen on the
36334 old ORPort and receive connections.
36335 - Avoid a second warning about machine/limits.h on Debian
36337 - Be willing to add our own routerinfo into the routerlist.
36338 Now authorities will include themselves in their directories
36339 and network-statuses.
36340 - Stop trying to upload rendezvous descriptors to every
36341 directory authority: only try the v1 authorities.
36342 - Servers no longer complain when they think they're not
36343 registered with the directory authorities. There were too many
36345 - Backport dist-rpm changes so rpms can be built without errors.
36348 - Implement an option, VirtualAddrMask, to set which addresses
36349 get handed out in response to mapaddress requests. This works
36350 around a bug in tsocks where 127.0.0.0/8 is never socksified.
36353 Changes in version 0.1.1.18-rc - 2006-04-10
36355 - Work harder to download live network-statuses from all the
36356 directory authorities we know about. Improve the threshold
36357 decision logic so we're more robust to edge cases.
36358 - When fetching rendezvous descriptors, we were willing to ask
36359 v2 authorities too, which would always return 404.
36362 - Stop listing down or invalid nodes in the v1 directory. This will
36363 reduce its bulk by about 1/3, and reduce load on directory
36365 - When deciding whether a router is Fast or Guard-worthy, consider
36366 his advertised BandwidthRate and not just the BandwidthCapacity.
36367 - No longer ship INSTALL and README files -- they are useless now.
36368 - Force rpmbuild to behave and honor target_cpu.
36369 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
36370 - Start to include translated versions of the tor-doc-*.html
36371 files, along with the screenshots. Still needs more work.
36372 - Start sending back 512 and 451 errors if mapaddress fails,
36373 rather than not sending anything back at all.
36374 - When we fail to bind or listen on an incoming or outgoing
36375 socket, we should close it before failing. otherwise we just
36376 leak it. (thanks to weasel for finding.)
36377 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
36378 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
36379 - Make NoPublish (even though deprecated) work again.
36380 - Fix a minor security flaw where a versioning auth dirserver
36381 could list a recommended version many times in a row to make
36382 clients more convinced that it's recommended.
36383 - Fix crash bug if there are two unregistered servers running
36384 with the same nickname, one of them is down, and you ask for
36385 them by nickname in your EntryNodes or ExitNodes. Also, try
36386 to pick the one that's running rather than an arbitrary one.
36387 - Fix an infinite loop we could hit if we go offline for too long.
36388 - Complain when we hit WSAENOBUFS on recv() or write() too.
36389 Perhaps this will help us hunt the bug.
36390 - If you're not a versioning dirserver, don't put the string
36391 "client-versions \nserver-versions \n" in your network-status.
36392 - Lower the minimum required number of file descriptors to 1000,
36393 so we can have some overhead for Valgrind on Linux, where the
36394 default ulimit -n is 1024.
36397 - Add tor.dizum.com as the fifth authoritative directory server.
36398 - Add a new config option FetchUselessDescriptors, off by default,
36399 for when you plan to run "exitlist" on your client and you want
36400 to know about even the non-running descriptors.
36403 Changes in version 0.1.1.17-rc - 2006-03-28
36405 - Clients and servers since 0.1.1.10-alpha have been expiring
36406 connections whenever they are idle for 5 minutes and they *do*
36407 have circuits on them. Oops. With this new version, clients will
36408 discard their previous entry guard choices and avoid choosing
36409 entry guards running these flawed versions.
36410 - Fix memory leak when uncompressing concatenated zlib streams. This
36411 was causing substantial leaks over time on Tor servers.
36412 - The v1 directory was including servers as much as 48 hours old,
36413 because that's how the new routerlist->routers works. Now only
36414 include them if they're 20 hours old or less.
36417 - Resume building on irix64, netbsd 2.0, etc.
36418 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
36420 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
36421 and it is confusing some users.
36422 - Mirrors stop caching the v1 directory so often.
36423 - Make the max number of old descriptors that a cache will hold
36424 rise with the number of directory authorities, so we can scale.
36425 - Change our win32 uname() hack to be more forgiving about what
36426 win32 versions it thinks it's found.
36429 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
36431 - When the controller's *setconf commands fail, collect an error
36432 message in a string and hand it back to the controller.
36433 - Make the v2 dir's "Fast" flag based on relative capacity, just
36434 like "Stable" is based on median uptime. Name everything in the
36435 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
36436 - Log server fingerprint on startup, so new server operators don't
36437 have to go hunting around their filesystem for it.
36438 - Return a robots.txt on our dirport to discourage google indexing.
36439 - Let the controller ask for GETINFO dir/status/foo so it can ask
36440 directly rather than connecting to the dir port. Only works when
36441 dirport is set for now.
36443 o New config options rather than constants in the code:
36444 - SocksTimeout: How long do we let a socks connection wait
36445 unattached before we fail it?
36446 - CircuitBuildTimeout: Cull non-open circuits that were born
36447 at least this many seconds ago.
36448 - CircuitIdleTimeout: Cull open clean circuits that were born
36449 at least this many seconds ago.
36452 Changes in version 0.1.1.16-rc - 2006-03-18
36453 o Bugfixes on 0.1.1.15-rc:
36454 - Fix assert when the controller asks to attachstream a connect-wait
36455 or resolve-wait stream.
36456 - Now do address rewriting when the controller asks us to attach
36457 to a particular circuit too. This will let Blossom specify
36458 "moria2.exit" without having to learn what moria2's IP address is.
36459 - Make the "tor --verify-config" command-line work again, so people
36460 can automatically check if their torrc will parse.
36461 - Authoritative dirservers no longer require an open connection from
36462 a server to consider him "reachable". We need this change because
36463 when we add new auth dirservers, old servers won't know not to
36465 - Let Tor build on Sun CC again.
36466 - Fix an off-by-one buffer size in dirserv.c that magically never
36467 hit our three authorities but broke sjmurdoch's own tor network.
36468 - If we as a directory mirror don't know of any v1 directory
36469 authorities, then don't try to cache any v1 directories.
36470 - Stop warning about unknown servers in our family when they are
36471 given as hex digests.
36472 - Stop complaining as quickly to the server operator that he
36473 hasn't registered his nickname/key binding.
36474 - Various cleanups so we can add new V2 Auth Dirservers.
36475 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
36476 reflect the updated flags in our v2 dir protocol.
36477 - Resume allowing non-printable characters for exit streams (both
36478 for connecting and for resolving). Now we tolerate applications
36479 that don't follow the RFCs. But continue to block malformed names
36482 o Bugfixes on 0.1.0.x:
36483 - Fix assert bug in close_logs(): when we close and delete logs,
36484 remove them all from the global "logfiles" list.
36485 - Fix minor integer overflow in calculating when we expect to use up
36486 our bandwidth allocation before hibernating.
36487 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
36488 there are multiple SSLs installed with different versions.
36489 - When we try to be a server and Address is not explicitly set and
36490 our hostname resolves to a private IP address, try to use an
36491 interface address if it has a public address. Now Windows machines
36492 that think of themselves as localhost can work by default.
36495 - Let the controller ask for GETINFO dir/server/foo so it can ask
36496 directly rather than connecting to the dir port.
36497 - Let the controller tell us about certain router descriptors
36498 that it doesn't want Tor to use in circuits. Implement
36499 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
36500 - New config option SafeSocks to reject all application connections
36501 using unsafe socks protocols. Defaults to off.
36504 Changes in version 0.1.1.15-rc - 2006-03-11
36505 o Bugfixes and cleanups:
36506 - When we're printing strings from the network, don't try to print
36507 non-printable characters. This protects us against shell escape
36508 sequence exploits, and also against attacks to fool humans into
36509 misreading their logs.
36510 - Fix a bug where Tor would fail to establish any connections if you
36511 left it off for 24 hours and then started it: we were happy with
36512 the obsolete network statuses, but they all referred to router
36513 descriptors that were too old to fetch, so we ended up with no
36514 valid router descriptors.
36515 - Fix a seg fault in the controller's "getinfo orconn-status"
36516 command while listing status on incoming handshaking connections.
36517 Introduce a status name "NEW" for these connections.
36518 - If we get a linelist or linelist_s config option from the torrc
36519 (e.g. ExitPolicy) and it has no value, warn and skip rather than
36520 silently resetting it to its default.
36521 - Don't abandon entry guards until they've been down or gone for
36523 - Cleaner and quieter log messages.
36526 - New controller signal NEWNYM that makes new application requests
36527 use clean circuits.
36528 - Add a new circuit purpose 'controller' to let the controller ask
36529 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
36530 controller command to let you specify the purpose if you're
36531 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
36532 command to let you change a circuit's purpose after it's been
36534 - Accept "private:*" in routerdesc exit policies; not generated yet
36535 because older Tors do not understand it.
36536 - Add BSD-style contributed startup script "rc.subr" from Peter
36540 Changes in version 0.1.1.14-alpha - 2006-02-20
36541 o Bugfixes on 0.1.1.x:
36542 - Don't die if we ask for a stdout or stderr log (even implicitly)
36543 and we're set to RunAsDaemon -- just warn.
36544 - We still had a few bugs in the OR connection rotation code that
36545 caused directory servers to slowly aggregate connections to other
36546 fast Tor servers. This time for sure!
36547 - Make log entries on Win32 include the name of the function again.
36548 - We were treating a pair of exit policies if they were equal even
36549 if one said accept and the other said reject -- causing us to
36550 not always publish a new descriptor since we thought nothing
36552 - Retry pending server downloads as well as pending networkstatus
36553 downloads when we unexpectedly get a socks request.
36554 - We were ignoring the IS_FAST flag in the directory status,
36555 meaning we were willing to pick trivial-bandwidth nodes for "fast"
36557 - If the controller's SAVECONF command fails (e.g. due to file
36558 permissions), let the controller know that it failed.
36561 - If we're trying to be a Tor server and running Windows 95/98/ME
36562 as a server, explain that we'll likely crash.
36563 - When we're a server, a client asks for an old-style directory,
36564 and our write bucket is empty, don't give it to him. This way
36565 small servers can continue to serve the directory *sometimes*,
36566 without getting overloaded.
36567 - Compress exit policies even more -- look for duplicate lines
36569 - Clients now honor the "guard" flag in the router status when
36570 picking entry guards, rather than looking at is_fast or is_stable.
36571 - Retain unrecognized lines in $DATADIR/state file, so that we can
36572 be forward-compatible.
36573 - Generate 18.0.0.0/8 address policy format in descs when we can;
36574 warn when the mask is not reducible to a bit-prefix.
36575 - Let the user set ControlListenAddress in the torrc. This can be
36576 dangerous, but there are some cases (like a secured LAN) where it
36578 - Split ReachableAddresses into ReachableDirAddresses and
36579 ReachableORAddresses, so we can restrict Dir conns to port 80
36580 and OR conns to port 443.
36581 - Now we can target arch and OS in rpm builds (contributed by
36582 Phobos). Also make the resulting dist-rpm filename match the
36584 - New config options to help controllers: FetchServerDescriptors
36585 and FetchHidServDescriptors for whether to fetch server
36586 info and hidserv info or let the controller do it, and
36587 PublishServerDescriptor and PublishHidServDescriptors.
36588 - Also let the controller set the __AllDirActionsPrivate config
36589 option if you want all directory fetches/publishes to happen via
36590 Tor (it assumes your controller bootstraps your circuits).
36593 Changes in version 0.1.0.17 - 2006-02-17
36594 o Crash bugfixes on 0.1.0.x:
36595 - When servers with a non-zero DirPort came out of hibernation,
36596 sometimes they would trigger an assert.
36598 o Other important bugfixes:
36599 - On platforms that don't have getrlimit (like Windows), we were
36600 artificially constraining ourselves to a max of 1024
36601 connections. Now just assume that we can handle as many as 15000
36602 connections. Hopefully this won't cause other problems.
36604 o Backported features:
36605 - When we're a server, a client asks for an old-style directory,
36606 and our write bucket is empty, don't give it to him. This way
36607 small servers can continue to serve the directory *sometimes*,
36608 without getting overloaded.
36609 - Whenever you get a 503 in response to a directory fetch, try
36610 once more. This will become important once servers start sending
36611 503's whenever they feel busy.
36612 - Fetch a new directory every 120 minutes, not every 40 minutes.
36613 Now that we have hundreds of thousands of users running the old
36614 directory algorithm, it's starting to hurt a lot.
36615 - Bump up the period for forcing a hidden service descriptor upload
36616 from 20 minutes to 1 hour.
36619 Changes in version 0.1.1.13-alpha - 2006-02-09
36620 o Crashes in 0.1.1.x:
36621 - When you tried to setconf ORPort via the controller, Tor would
36622 crash. So people using TorCP to become a server were sad.
36623 - Solve (I hope) the stack-smashing bug that we were seeing on fast
36624 servers. The problem appears to be something do with OpenSSL's
36625 random number generation, or how we call it, or something. Let me
36626 know if the crashes continue.
36627 - Turn crypto hardware acceleration off by default, until we find
36628 somebody smart who can test it for us. (It appears to produce
36629 seg faults in at least some cases.)
36630 - Fix a rare assert error when we've tried all intro points for
36631 a hidden service and we try fetching the service descriptor again:
36632 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
36635 - Fix a major load balance bug: we were round-robining in 16 KB
36636 chunks, and servers with bandwidthrate of 20 KB, while downloading
36637 a 600 KB directory, would starve their other connections. Now we
36638 try to be a bit more fair.
36639 - Dir authorities and mirrors were never expiring the newest
36640 descriptor for each server, causing memory and directory bloat.
36641 - Fix memory-bloating and connection-bloating bug on servers: We
36642 were never closing any connection that had ever had a circuit on
36643 it, because we were checking conn->n_circuits == 0, yet we had a
36644 bug that let it go negative.
36645 - Make Tor work using squid as your http proxy again -- squid
36646 returns an error if you ask for a URL that's too long, and it uses
36647 a really generic error message. Plus, many people are behind a
36648 transparent squid so they don't even realize it.
36649 - On platforms that don't have getrlimit (like Windows), we were
36650 artificially constraining ourselves to a max of 1024
36651 connections. Now just assume that we can handle as many as 15000
36652 connections. Hopefully this won't cause other problems.
36653 - Add a new config option ExitPolicyRejectPrivate which defaults to
36654 1. This means all exit policies will begin with rejecting private
36655 addresses, unless the server operator explicitly turns it off.
36658 - Clients no longer download descriptors for non-running
36660 - Before we add new directory authorities, we should make it
36661 clear that only v1 authorities should receive/publish hidden
36662 service descriptors.
36665 - As soon as we've fetched some more directory info, immediately
36666 try to download more server descriptors. This way we don't have
36667 a 10 second pause during initial bootstrapping.
36668 - Remove even more loud log messages that the server operator can't
36670 - When we're running an obsolete or un-recommended version, make
36671 the log message more clear about what the problem is and what
36672 versions *are* still recommended.
36673 - Provide a more useful warn message when our onion queue gets full:
36674 the CPU is too slow or the exit policy is too liberal.
36675 - Don't warn when we receive a 503 from a dirserver/cache -- this
36676 will pave the way for them being able to refuse if they're busy.
36677 - When we fail to bind a listener, try to provide a more useful
36678 log message: e.g., "Is Tor already running?"
36679 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
36680 Goldberg can prove things about our handshake protocol more
36682 - MaxConn has been obsolete for a while now. Document the ConnLimit
36683 config option, which is a *minimum* number of file descriptors
36684 that must be available else Tor refuses to start.
36685 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
36686 if you log to syslog and want something other than LOG_DAEMON.
36687 - Make dirservers generate a separate "guard" flag to mean,
36688 "would make a good entry guard". Make clients parse it and vote
36689 on it. Not used by clients yet.
36690 - Implement --with-libevent-dir option to ./configure. Also, improve
36691 search techniques to find libevent, and use those for openssl too.
36692 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
36693 - Only start testing reachability once we've established a
36694 circuit. This will make startup on dirservers less noisy.
36695 - Don't try to upload hidden service descriptors until we have
36696 established a circuit.
36697 - Fix the controller's "attachstream 0" command to treat conn like
36698 it just connected, doing address remapping, handling .exit and
36699 .onion idioms, and so on. Now we're more uniform in making sure
36700 that the controller hears about new and closing connections.
36703 Changes in version 0.1.1.12-alpha - 2006-01-11
36704 o Bugfixes on 0.1.1.x:
36705 - The fix to close duplicate server connections was closing all
36706 Tor client connections if they didn't establish a circuit
36707 quickly enough. Oops.
36708 - Fix minor memory issue (double-free) that happened on exit.
36710 o Bugfixes on 0.1.0.x:
36711 - Tor didn't warn when it failed to open a log file.
36714 Changes in version 0.1.1.11-alpha - 2006-01-10
36715 o Crashes in 0.1.1.x:
36716 - Include all the assert/crash fixes from 0.1.0.16.
36717 - If you start Tor and then quit very quickly, there were some
36718 races that tried to free things that weren't allocated yet.
36719 - Fix a rare memory stomp if you're running hidden services.
36720 - Fix segfault when specifying DirServer in config without nickname.
36721 - Fix a seg fault when you finish connecting to a server but at
36722 that moment you dump his server descriptor.
36723 - Extendcircuit and Attachstream controller commands would
36724 assert/crash if you don't give them enough arguments.
36725 - Fix an assert error when we're out of space in the connection_list
36726 and we try to post a hidden service descriptor (reported by weasel).
36727 - If you specify a relative torrc path and you set RunAsDaemon in
36728 your torrc, then it chdir()'s to the new directory. If you HUP,
36729 it tries to load the new torrc location, fails, and exits.
36730 The fix: no longer allow a relative path to torrc using -f.
36733 - Implement "entry guards": automatically choose a handful of entry
36734 nodes and stick with them for all circuits. Only pick new guards
36735 when the ones you have are unsuitable, and if the old guards
36736 become suitable again, switch back. This will increase security
36737 dramatically against certain end-point attacks. The EntryNodes
36738 config option now provides some hints about which entry guards you
36739 want to use most; and StrictEntryNodes means to only use those.
36740 - New directory logic: download by descriptor digest, not by
36741 fingerprint. Caches try to download all listed digests from
36742 authorities; clients try to download "best" digests from caches.
36743 This avoids partitioning and isolating attacks better.
36744 - Make the "stable" router flag in network-status be the median of
36745 the uptimes of running valid servers, and make clients pay
36746 attention to the network-status flags. Thus the cutoff adapts
36747 to the stability of the network as a whole, making IRC, IM, etc
36748 connections more reliable.
36751 - Tor servers with dynamic IP addresses were needing to wait 18
36752 hours before they could start doing reachability testing using
36753 the new IP address and ports. This is because they were using
36754 the internal descriptor to learn what to test, yet they were only
36755 rebuilding the descriptor once they decided they were reachable.
36756 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
36757 to download certain server descriptors, throw them away, and then
36758 fetch them again after 30 minutes. Now mirrors throw away these
36759 server descriptors so clients can't get them.
36760 - We were leaving duplicate connections to other ORs open for a week,
36761 rather than closing them once we detect a duplicate. This only
36762 really affected authdirservers, but it affected them a lot.
36763 - Spread the authdirservers' reachability testing over the entire
36764 testing interval, so we don't try to do 500 TLS's at once every
36768 - If the network is down, and we try to connect to a conn because
36769 we have a circuit in mind, and we timeout (30 seconds) because the
36770 network never answers, we were expiring the circuit, but we weren't
36771 obsoleting the connection or telling the entry_guards functions.
36772 - Some Tor servers process billions of cells per day. These statistics
36773 need to be uint64_t's.
36774 - Check for integer overflows in more places, when adding elements
36775 to smartlists. This could possibly prevent a buffer overflow
36776 on malicious huge inputs. I don't see any, but I haven't looked
36778 - ReachableAddresses kept growing new "reject *:*" lines on every
36780 - When you "setconf log" via the controller, it should remove all
36781 logs. We were automatically adding back in a "log notice stdout".
36782 - Newly bootstrapped Tor networks couldn't establish hidden service
36783 circuits until they had nodes with high uptime. Be more tolerant.
36784 - We were marking servers down when they could not answer every piece
36785 of the directory request we sent them. This was far too harsh.
36786 - Fix the torify (tsocks) config file to not use Tor for localhost
36788 - Directory authorities now go to the proper authority when asking for
36789 a networkstatus, even when they want a compressed one.
36790 - Fix a harmless bug that was causing Tor servers to log
36791 "Got an end because of misc error, but we're not an AP. Closing."
36792 - Authorities were treating their own descriptor changes as cosmetic,
36793 meaning the descriptor available in the network-status and the
36794 descriptor that clients downloaded were different.
36795 - The OS X installer was adding a symlink for tor_resolve but
36796 the binary was called tor-resolve (reported by Thomas Hardly).
36797 - Workaround a problem with some http proxies where they refuse GET
36798 requests that specify "Content-Length: 0" (reported by Adrian).
36799 - Fix wrong log message when you add a "HiddenServiceNodes" config
36800 line without any HiddenServiceDir line (reported by Chris Thomas).
36803 - Write the TorVersion into the state file so we have a prayer of
36804 keeping forward and backward compatibility.
36805 - Revive the FascistFirewall config option rather than eliminating it:
36806 now it's a synonym for ReachableAddresses *:80,*:443.
36807 - Clients choose directory servers from the network status lists,
36808 not from their internal list of router descriptors. Now they can
36809 go to caches directly rather than needing to go to authorities
36811 - Directory authorities ignore router descriptors that have only
36812 cosmetic differences: do this for 0.1.0.x servers now too.
36813 - Add a new flag to network-status indicating whether the server
36814 can answer v2 directory requests too.
36815 - Authdirs now stop whining so loudly about bad descriptors that
36816 they fetch from other dirservers. So when there's a log complaint,
36817 it's for sure from a freshly uploaded descriptor.
36818 - Reduce memory requirements in our structs by changing the order
36820 - There used to be two ways to specify your listening ports in a
36821 server descriptor: on the "router" line and with a separate "ports"
36822 line. Remove support for the "ports" line.
36823 - New config option "AuthDirRejectUnlisted" for auth dirservers as
36824 a panic button: if we get flooded with unusable servers we can
36825 revert to only listing servers in the approved-routers file.
36826 - Auth dir servers can now mark a fingerprint as "!reject" or
36827 "!invalid" in the approved-routers file (as its nickname), to
36828 refuse descriptors outright or include them but marked as invalid.
36829 - Servers store bandwidth history across restarts/crashes.
36830 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
36831 get a better idea of why their circuits failed. Not used yet.
36832 - Directory mirrors now cache up to 16 unrecognized network-status
36833 docs. Now we can add new authdirservers and they'll be cached too.
36834 - When picking a random directory, prefer non-authorities if any
36836 - New controller option "getinfo desc/all-recent" to fetch the
36837 latest server descriptor for every router that Tor knows about.
36840 Changes in version 0.1.0.16 - 2006-01-02
36841 o Crash bugfixes on 0.1.0.x:
36842 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
36843 corrupting the heap, losing FDs, or crashing when we need to resize
36844 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
36845 - It turns out sparc64 platforms crash on unaligned memory access
36846 too -- so detect and avoid this.
36847 - Handle truncated compressed data correctly (by detecting it and
36849 - Fix possible-but-unlikely free(NULL) in control.c.
36850 - When we were closing connections, there was a rare case that
36851 stomped on memory, triggering seg faults and asserts.
36852 - Avoid potential infinite recursion when building a descriptor. (We
36853 don't know that it ever happened, but better to fix it anyway.)
36854 - We were neglecting to unlink marked circuits from soon-to-close OR
36855 connections, which caused some rare scribbling on freed memory.
36856 - Fix a memory stomping race bug when closing the joining point of two
36857 rendezvous circuits.
36858 - Fix an assert in time parsing found by Steven Murdoch.
36860 o Other bugfixes on 0.1.0.x:
36861 - When we're doing reachability testing, provide more useful log
36862 messages so the operator knows what to expect.
36863 - Do not check whether DirPort is reachable when we are suppressing
36864 advertising it because of hibernation.
36865 - When building with -static or on Solaris, we sometimes needed -ldl.
36866 - When we're deciding whether a stream has enough circuits around
36867 that can handle it, count the freshly dirty ones and not the ones
36868 that are so dirty they won't be able to handle it.
36869 - When we're expiring old circuits, we had a logic error that caused
36870 us to close new rendezvous circuits rather than old ones.
36871 - Give a more helpful log message when you try to change ORPort via
36872 the controller: you should upgrade Tor if you want that to work.
36873 - We were failing to parse Tor versions that start with "Tor ".
36874 - Tolerate faulty streams better: when a stream fails for reason
36875 exitpolicy, stop assuming that the router is lying about his exit
36876 policy. When a stream fails for reason misc, allow it to retry just
36877 as if it was resolvefailed. When a stream has failed three times,
36878 reset its failure count so we can try again and get all three tries.
36881 Changes in version 0.1.1.10-alpha - 2005-12-11
36882 o Correctness bugfixes on 0.1.0.x:
36883 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
36884 corrupting the heap, losing FDs, or crashing when we need to resize
36885 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
36886 - Stop doing the complex voodoo overkill checking for insecure
36887 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
36888 - When we were closing connections, there was a rare case that
36889 stomped on memory, triggering seg faults and asserts.
36890 - We were neglecting to unlink marked circuits from soon-to-close OR
36891 connections, which caused some rare scribbling on freed memory.
36892 - When we're deciding whether a stream has enough circuits around
36893 that can handle it, count the freshly dirty ones and not the ones
36894 that are so dirty they won't be able to handle it.
36895 - Recover better from TCP connections to Tor servers that are
36896 broken but don't tell you (it happens!); and rotate TLS
36897 connections once a week.
36898 - When we're expiring old circuits, we had a logic error that caused
36899 us to close new rendezvous circuits rather than old ones.
36900 - Fix a scary-looking but apparently harmless bug where circuits
36901 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
36902 servers, and never switch to state CIRCUIT_STATE_OPEN.
36903 - When building with -static or on Solaris, we sometimes needed to
36905 - Give a useful message when people run Tor as the wrong user,
36906 rather than telling them to start chowning random directories.
36907 - We were failing to inform the controller about new .onion streams.
36909 o Security bugfixes on 0.1.0.x:
36910 - Refuse server descriptors if the fingerprint line doesn't match
36911 the included identity key. Tor doesn't care, but other apps (and
36912 humans) might actually be trusting the fingerprint line.
36913 - We used to kill the circuit when we receive a relay command we
36914 don't recognize. Now we just drop it.
36915 - Start obeying our firewall options more rigorously:
36916 . If we can't get to a dirserver directly, try going via Tor.
36917 . Don't ever try to connect (as a client) to a place our
36918 firewall options forbid.
36919 . If we specify a proxy and also firewall options, obey the
36920 firewall options even when we're using the proxy: some proxies
36921 can only proxy to certain destinations.
36922 - Fix a bug found by Lasse Overlier: when we were making internal
36923 circuits (intended to be cannibalized later for rendezvous and
36924 introduction circuits), we were picking them so that they had
36925 useful exit nodes. There was no need for this, and it actually
36926 aids some statistical attacks.
36927 - Start treating internal circuits and exit circuits separately.
36928 It's important to keep them separate because internal circuits
36929 have their last hops picked like middle hops, rather than like
36930 exit hops. So exiting on them will break the user's expectations.
36932 o Bugfixes on 0.1.1.x:
36933 - Take out the mis-feature where we tried to detect IP address
36934 flapping for people with DynDNS, and chose not to upload a new
36935 server descriptor sometimes.
36936 - Try to be compatible with OpenSSL 0.9.6 again.
36937 - Log fix: when the controller is logging about .onion addresses,
36938 sometimes it didn't include the ".onion" part of the address.
36939 - Don't try to modify options->DirServers internally -- if the
36940 user didn't specify any, just add the default ones directly to
36941 the trusted dirserver list. This fixes a bug where people running
36942 controllers would use SETCONF on some totally unrelated config
36943 option, and Tor would start yelling at them about changing their
36945 - Let the controller's redirectstream command specify a port, in
36946 case the controller wants to change that too.
36947 - When we requested a pile of server descriptors, we sometimes
36948 accidentally launched a duplicate request for the first one.
36949 - Bugfix for trackhostexits: write down the fingerprint of the
36950 chosen exit, not its nickname, because the chosen exit might not
36952 - When parsing foo.exit, if foo is unknown, and we are leaving
36953 circuits unattached, set the chosen_exit field and leave the
36954 address empty. This matters because controllers got confused
36956 - Directory authorities no longer try to download server
36957 descriptors that they know they will reject.
36959 o Features and updates:
36960 - Replace balanced trees with hash tables: this should make stuff
36961 significantly faster.
36962 - Resume using the AES counter-mode implementation that we ship,
36963 rather than OpenSSL's. Ours is significantly faster.
36964 - Many other CPU and memory improvements.
36965 - Add a new config option FastFirstHopPK (on by default) so clients
36966 do a trivial crypto handshake for their first hop, since TLS has
36967 already taken care of confidentiality and authentication.
36968 - Add a new config option TestSocks so people can see if their
36969 applications are using socks4, socks4a, socks5-with-ip, or
36970 socks5-with-hostname. This way they don't have to keep mucking
36971 with tcpdump and wondering if something got cached somewhere.
36972 - Warn when listening on a public address for socks. I suspect a
36973 lot of people are setting themselves up as open socks proxies,
36974 and they have no idea that jerks on the Internet are using them,
36975 since they simply proxy the traffic into the Tor network.
36976 - Add "private:*" as an alias in configuration for policies. Now
36977 you can simplify your exit policy rather than needing to list
36978 every single internal or nonroutable network space.
36979 - Add a new controller event type that allows controllers to get
36980 all server descriptors that were uploaded to a router in its role
36981 as authoritative dirserver.
36982 - Start shipping socks-extensions.txt, tor-doc-unix.html,
36983 tor-doc-server.html, and stylesheet.css in the tarball.
36984 - Stop shipping tor-doc.html in the tarball.
36987 Changes in version 0.1.1.9-alpha - 2005-11-15
36988 o Usability improvements:
36989 - Start calling it FooListenAddress rather than FooBindAddress,
36990 since few of our users know what it means to bind an address
36992 - Reduce clutter in server logs. We're going to try to make
36993 them actually usable now. New config option ProtocolWarnings that
36994 lets you hear about how _other Tors_ are breaking the protocol. Off
36996 - Divide log messages into logging domains. Once we put some sort
36997 of interface on this, it will let people looking at more verbose
36998 log levels specify the topics they want to hear more about.
36999 - Make directory servers return better http 404 error messages
37000 instead of a generic "Servers unavailable".
37001 - Check for even more Windows version flags when writing the platform
37002 string in server descriptors, and note any we don't recognize.
37003 - Clean up more of the OpenSSL memory when exiting, so we can detect
37004 memory leaks better.
37005 - Make directory authorities be non-versioning, non-naming by
37006 default. Now we can add new directory servers without requiring
37007 their operators to pay close attention.
37008 - When logging via syslog, include the pid whenever we provide
37009 a log entry. Suggested by Todd Fries.
37011 o Performance improvements:
37012 - Directory servers now silently throw away new descriptors that
37013 haven't changed much if the timestamps are similar. We do this to
37014 tolerate older Tor servers that upload a new descriptor every 15
37015 minutes. (It seemed like a good idea at the time.)
37016 - Inline bottleneck smartlist functions; use fast versions by default.
37017 - Add a "Map from digest to void*" abstraction digestmap_t so we
37018 can do less hex encoding/decoding. Use it in router_get_by_digest()
37019 to resolve a performance bottleneck.
37020 - Allow tor_gzip_uncompress to extract as much as possible from
37021 truncated compressed data. Try to extract as many
37022 descriptors as possible from truncated http responses (when
37023 DIR_PURPOSE_FETCH_ROUTERDESC).
37024 - Make circ->onionskin a pointer, not a static array. moria2 was using
37025 125000 circuit_t's after it had been up for a few weeks, which
37026 translates to 20+ megs of wasted space.
37027 - The private half of our EDH handshake keys are now chosen out
37028 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
37030 o Security improvements:
37031 - Start making directory caches retain old routerinfos, so soon
37032 clients can start asking by digest of descriptor rather than by
37033 fingerprint of server.
37034 - Add half our entropy from RAND_poll in OpenSSL. This knows how
37035 to use egd (if present), openbsd weirdness (if present), vms/os2
37036 weirdness (if we ever port there), and more in the future.
37038 o Bugfixes on 0.1.0.x:
37039 - Do round-robin writes of at most 16 kB per write. This might be
37040 more fair on loaded Tor servers, and it might resolve our Windows
37041 crash bug. It might also slow things down.
37042 - Our TLS handshakes were generating a single public/private
37043 keypair for the TLS context, rather than making a new one for
37044 each new connections. Oops. (But we were still rotating them
37045 periodically, so it's not so bad.)
37046 - When we were cannibalizing a circuit with a particular exit
37047 node in mind, we weren't checking to see if that exit node was
37048 already present earlier in the circuit. Oops.
37049 - When a Tor server's IP changes (e.g. from a dyndns address),
37050 upload a new descriptor so clients will learn too.
37051 - Really busy servers were keeping enough circuits open on stable
37052 connections that they were wrapping around the circuit_id
37053 space. (It's only two bytes.) This exposed a bug where we would
37054 feel free to reuse a circuit_id even if it still exists but has
37055 been marked for close. Try to fix this bug. Some bug remains.
37056 - If we would close a stream early (e.g. it asks for a .exit that
37057 we know would refuse it) but the LeaveStreamsUnattached config
37058 option is set by the controller, then don't close it.
37060 o Bugfixes on 0.1.1.8-alpha:
37061 - Fix a big pile of memory leaks, some of them serious.
37062 - Do not try to download a routerdesc if we would immediately reject
37064 - Resume inserting a newline between all router descriptors when
37065 generating (old style) signed directories, since our spec says
37067 - When providing content-type application/octet-stream for
37068 server descriptors using .z, we were leaving out the
37069 content-encoding header. Oops. (Everything tolerated this just
37070 fine, but that doesn't mean we need to be part of the problem.)
37071 - Fix a potential seg fault in getconf and getinfo using version 1
37072 of the controller protocol.
37073 - Avoid crash: do not check whether DirPort is reachable when we
37074 are suppressing it because of hibernation.
37075 - Make --hash-password not crash on exit.
37078 Changes in version 0.1.1.8-alpha - 2005-10-07
37079 o New features (major):
37080 - Clients don't download or use the directory anymore. Now they
37081 download and use network-statuses from the trusted dirservers,
37082 and fetch individual server descriptors as needed from mirrors.
37083 See dir-spec.txt for all the gory details.
37084 - Be more conservative about whether to advertise our DirPort.
37085 The main change is to not advertise if we're running at capacity
37086 and either a) we could hibernate or b) our capacity is low and
37087 we're using a default DirPort.
37088 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
37090 o New features (minor):
37091 - Try to be smart about when to retry network-status and
37092 server-descriptor fetches. Still needs some tuning.
37093 - Stop parsing, storing, or using running-routers output (but
37094 mirrors still cache and serve it).
37095 - Consider a threshold of versioning dirservers (dirservers who have
37096 an opinion about which Tor versions are still recommended) before
37097 deciding whether to warn the user that he's obsolete.
37098 - Dirservers can now reject/invalidate by key and IP, with the
37099 config options "AuthDirInvalid" and "AuthDirReject". This is
37100 useful since currently we automatically list servers as running
37101 and usable even if we know they're jerks.
37102 - Provide dire warnings to any users who set DirServer; move it out
37103 of torrc.sample and into torrc.complete.
37104 - Add MyFamily to torrc.sample in the server section.
37105 - Add nicknames to the DirServer line, so we can refer to them
37106 without requiring all our users to memorize their IP addresses.
37107 - When we get an EOF or a timeout on a directory connection, note
37108 how many bytes of serverdesc we are dropping. This will help
37109 us determine whether it is smart to parse incomplete serverdesc
37111 - Add a new function to "change pseudonyms" -- that is, to stop
37112 using any currently-dirty circuits for new streams, so we don't
37113 link new actions to old actions. Currently it's only called on
37114 HUP (or SIGNAL RELOAD).
37115 - On sighup, if UseHelperNodes changed to 1, use new circuits.
37116 - Start using RAND_bytes rather than RAND_pseudo_bytes from
37117 OpenSSL. Also, reseed our entropy every hour, not just at
37118 startup. And entropy in 512-bit chunks, not 160-bit chunks.
37120 o Fixes on 0.1.1.7-alpha:
37121 - Nobody ever implemented EVENT_ADDRMAP for control protocol
37122 version 0, so don't let version 0 controllers ask for it.
37123 - If you requested something with too many newlines via the
37124 v1 controller protocol, you could crash tor.
37125 - Fix a number of memory leaks, including some pretty serious ones.
37126 - Re-enable DirPort testing again, so Tor servers will be willing
37127 to advertise their DirPort if it's reachable.
37128 - On TLS handshake, only check the other router's nickname against
37129 its expected nickname if is_named is set.
37131 o Fixes forward-ported from 0.1.0.15:
37132 - Don't crash when we don't have any spare file descriptors and we
37133 try to spawn a dns or cpu worker.
37134 - Make the numbers in read-history and write-history into uint64s,
37135 so they don't overflow and publish negatives in the descriptor.
37137 o Fixes on 0.1.0.x:
37138 - For the OS X package's modified privoxy config file, comment
37139 out the "logfile" line so we don't log everything passed
37141 - We were whining about using socks4 or socks5-with-local-lookup
37142 even when it's an IP in the "virtual" range we designed exactly
37144 - We were leaking some memory every time the client changes IPs.
37145 - Never call free() on tor_malloc()d memory. This will help us
37146 use dmalloc to detect memory leaks.
37147 - Check for named servers when looking them up by nickname;
37148 warn when we'recalling a non-named server by its nickname;
37149 don't warn twice about the same name.
37150 - Try to list MyFamily elements by key, not by nickname, and warn
37151 if we've not heard of the server.
37152 - Make windows platform detection (uname equivalent) smarter.
37153 - It turns out sparc64 doesn't like unaligned access either.
37156 Changes in version 0.1.0.15 - 2005-09-23
37157 o Bugfixes on 0.1.0.x:
37158 - Reject ports 465 and 587 (spam targets) in default exit policy.
37159 - Don't crash when we don't have any spare file descriptors and we
37160 try to spawn a dns or cpu worker.
37161 - Get rid of IgnoreVersion undocumented config option, and make us
37162 only warn, never exit, when we're running an obsolete version.
37163 - Don't try to print a null string when your server finds itself to
37164 be unreachable and the Address config option is empty.
37165 - Make the numbers in read-history and write-history into uint64s,
37166 so they don't overflow and publish negatives in the descriptor.
37167 - Fix a minor memory leak in smartlist_string_remove().
37168 - We were only allowing ourselves to upload a server descriptor at
37169 most every 20 minutes, even if it changed earlier than that.
37170 - Clean up log entries that pointed to old URLs.
37173 Changes in version 0.1.1.7-alpha - 2005-09-14
37174 o Fixes on 0.1.1.6-alpha:
37175 - Exit servers were crashing when people asked them to make a
37176 connection to an address not in their exit policy.
37177 - Looking up a non-existent stream for a v1 control connection would
37179 - Fix a seg fault if we ask a dirserver for a descriptor by
37180 fingerprint but he doesn't know about him.
37181 - SETCONF was appending items to linelists, not clearing them.
37182 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
37183 out and refuse the setconf if it would fail.
37184 - Downgrade the dirserver log messages when whining about
37188 - Add Peter Palfrader's check-tor script to tor/contrib/
37189 It lets you easily check whether a given server (referenced by
37190 nickname) is reachable by you.
37191 - Numerous changes to move towards client-side v2 directories. Not
37194 o Fixes on 0.1.0.x:
37195 - If the user gave tor an odd number of command-line arguments,
37196 we were silently ignoring the last one. Now we complain and fail.
37197 [This wins the oldest-bug prize -- this bug has been present since
37198 November 2002, as released in Tor 0.0.0.]
37199 - Do not use unaligned memory access on alpha, mips, or mipsel.
37200 It *works*, but is very slow, so we treat them as if it doesn't.
37201 - Retry directory requests if we fail to get an answer we like
37202 from a given dirserver (we were retrying before, but only if
37203 we fail to connect).
37204 - When writing the RecommendedVersions line, sort them first.
37205 - When the client asked for a rendezvous port that the hidden
37206 service didn't want to provide, we were sending an IP address
37207 back along with the end cell. Fortunately, it was zero. But stop
37209 - Correct "your server is reachable" log entries to indicate that
37210 it was self-testing that told us so.
37213 Changes in version 0.1.1.6-alpha - 2005-09-09
37214 o Fixes on 0.1.1.5-alpha:
37215 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
37216 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
37217 - Fix bug with tor_memmem finding a match at the end of the string.
37218 - Make unit tests run without segfaulting.
37219 - Resolve some solaris x86 compile warnings.
37220 - Handle duplicate lines in approved-routers files without warning.
37221 - Fix bug where as soon as a server refused any requests due to his
37222 exit policy (e.g. when we ask for localhost and he tells us that's
37223 127.0.0.1 and he won't do it), we decided he wasn't obeying his
37224 exit policy using him for any exits.
37225 - Only do openssl hardware accelerator stuff if openssl version is
37228 o New controller features/fixes:
37229 - Add a "RESETCONF" command so you can set config options like
37230 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
37231 a config option in the torrc with no value, then it clears it
37232 entirely (rather than setting it to its default).
37233 - Add a "GETINFO config-file" to tell us where torrc is.
37234 - Avoid sending blank lines when GETINFO replies should be empty.
37235 - Add a QUIT command for the controller (for using it manually).
37236 - Fix a bug in SAVECONF that was adding default dirservers and
37237 other redundant entries to the torrc file.
37239 o Start on the new directory design:
37240 - Generate, publish, cache, serve new network-status format.
37241 - Publish individual descriptors (by fingerprint, by "all", and by
37243 - Publish client and server recommended versions separately.
37244 - Allow tor_gzip_uncompress() to handle multiple concatenated
37245 compressed strings. Serve compressed groups of router
37246 descriptors. The compression logic here could be more
37248 - Distinguish v1 authorities (all currently trusted directories)
37249 from v2 authorities (all trusted directories).
37250 - Change DirServers config line to note which dirs are v1 authorities.
37251 - Add configuration option "V1AuthoritativeDirectory 1" which
37252 moria1, moria2, and tor26 should set.
37253 - Remove option when getting directory cache to see whether they
37254 support running-routers; they all do now. Replace it with one
37255 to see whether caches support v2 stuff.
37258 - Dirservers now do their own external reachability testing of each
37259 Tor server, and only list them as running if they've been found to
37260 be reachable. We also send back warnings to the server's logs if
37261 it uploads a descriptor that we already believe is unreachable.
37262 - Implement exit enclaves: if we know an IP address for the
37263 destination, and there's a running Tor server at that address
37264 which allows exit to the destination, then extend the circuit to
37265 that exit first. This provides end-to-end encryption and end-to-end
37266 authentication. Also, if the user wants a .exit address or enclave,
37267 use 4 hops rather than 3, and cannibalize a general circ for it
37269 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
37270 controller. Also, rotate dns and cpu workers if the controller
37271 changes options that will affect them; and initialize the dns
37272 worker cache tree whether or not we start out as a server.
37273 - Only upload a new server descriptor when options change, 18
37274 hours have passed, uptime is reset, or bandwidth changes a lot.
37275 - Check [X-]Forwarded-For headers in HTTP requests when generating
37276 log messages. This lets people run dirservers (and caches) behind
37277 Apache but still know which IP addresses are causing warnings.
37279 o Config option changes:
37280 - Replace (Fascist)Firewall* config options with a new
37281 ReachableAddresses option that understands address policies.
37282 For example, "ReachableAddresses *:80,*:443"
37283 - Get rid of IgnoreVersion undocumented config option, and make us
37284 only warn, never exit, when we're running an obsolete version.
37285 - Make MonthlyAccountingStart config option truly obsolete now.
37287 o Fixes on 0.1.0.x:
37288 - Reject ports 465 and 587 in the default exit policy, since
37289 people have started using them for spam too.
37290 - It turns out we couldn't bootstrap a network since we added
37291 reachability detection in 0.1.0.1-rc. Good thing the Tor network
37292 has never gone down. Add an AssumeReachable config option to let
37293 servers and dirservers bootstrap. When we're trying to build a
37294 high-uptime or high-bandwidth circuit but there aren't enough
37295 suitable servers, try being less picky rather than simply failing.
37296 - Our logic to decide if the OR we connected to was the right guy
37297 was brittle and maybe open to a mitm for unverified routers.
37298 - We weren't cannibalizing circuits correctly for
37299 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
37300 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
37301 build those from scratch. This should make hidden services faster.
37302 - Predict required circuits better, with an eye toward making hidden
37303 services faster on the service end.
37304 - Retry streams if the exit node sends back a 'misc' failure. This
37305 should result in fewer random failures. Also, after failing
37306 from resolve failed or misc, reset the num failures, so we give
37307 it a fair shake next time we try.
37308 - Clean up the rendezvous warn log msgs, and downgrade some to info.
37309 - Reduce severity on logs about dns worker spawning and culling.
37310 - When we're shutting down and we do something like try to post a
37311 server descriptor or rendezvous descriptor, don't complain that
37312 we seem to be unreachable. Of course we are, we're shutting down.
37313 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
37314 We don't use them yet, but maybe one day our DNS resolver will be
37315 able to discover them.
37316 - Make ContactInfo mandatory for authoritative directory servers.
37317 - Require server descriptors to list IPv4 addresses -- hostnames
37318 are no longer allowed. This also fixes some potential security
37319 problems with people providing hostnames as their address and then
37320 preferentially resolving them to partition users.
37321 - Change log line for unreachability to explicitly suggest /etc/hosts
37322 as the culprit. Also make it clearer what IP address and ports we're
37323 testing for reachability.
37324 - Put quotes around user-supplied strings when logging so users are
37325 more likely to realize if they add bad characters (like quotes)
37327 - Let auth dir servers start without specifying an Address config
37329 - Make unit tests (and other invocations that aren't the real Tor)
37330 run without launching listeners, creating subdirectories, and so on.
37333 Changes in version 0.1.1.5-alpha - 2005-08-08
37334 o Bugfixes included in 0.1.0.14.
37336 o Bugfixes on 0.1.0.x:
37337 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
37338 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
37339 it would silently using ignore the 6668.
37342 Changes in version 0.1.0.14 - 2005-08-08
37343 o Bugfixes on 0.1.0.x:
37344 - Fix the other half of the bug with crypto handshakes
37346 - Fix an assert trigger if you send a 'signal term' via the
37347 controller when it's listening for 'event info' messages.
37350 Changes in version 0.1.1.4-alpha - 2005-08-04
37351 o Bugfixes included in 0.1.0.13.
37354 - Improve tor_gettimeofday() granularity on windows.
37355 - Make clients regenerate their keys when their IP address changes.
37356 - Implement some more GETINFO goodness: expose helper nodes, config
37357 options, getinfo keys.
37360 Changes in version 0.1.0.13 - 2005-08-04
37361 o Bugfixes on 0.1.0.x:
37362 - Fix a critical bug in the security of our crypto handshakes.
37363 - Fix a size_t underflow in smartlist_join_strings2() that made
37364 it do bad things when you hand it an empty smartlist.
37365 - Fix Windows installer to ship Tor license (thanks to Aphex for
37366 pointing out this oversight) and put a link to the doc directory
37368 - Explicitly set no-unaligned-access for sparc: it turns out the
37369 new gcc's let you compile broken code, but that doesn't make it
37373 Changes in version 0.1.1.3-alpha - 2005-07-23
37374 o Bugfixes on 0.1.1.2-alpha:
37375 - Fix a bug in handling the controller's "post descriptor"
37377 - Fix several bugs in handling the controller's "extend circuit"
37379 - Fix a bug in handling the controller's "stream status" event.
37380 - Fix an assert failure if we have a controller listening for
37381 circuit events and we go offline.
37382 - Re-allow hidden service descriptors to publish 0 intro points.
37383 - Fix a crash when generating your hidden service descriptor if
37384 you don't have enough intro points already.
37386 o New features on 0.1.1.2-alpha:
37387 - New controller function "getinfo accounting", to ask how
37388 many bytes we've used in this time period.
37389 - Experimental support for helper nodes: a lot of the risk from
37390 a small static adversary comes because users pick new random
37391 nodes every time they rebuild a circuit. Now users will try to
37392 stick to the same small set of entry nodes if they can. Not
37393 enabled by default yet.
37395 o Bugfixes on 0.1.0.12:
37396 - If you're an auth dir server, always publish your dirport,
37397 even if you haven't yet found yourself to be reachable.
37398 - Fix a size_t underflow in smartlist_join_strings2() that made
37399 it do bad things when you hand it an empty smartlist.
37402 Changes in version 0.1.0.12 - 2005-07-18
37403 o New directory servers:
37404 - tor26 has changed IP address.
37406 o Bugfixes on 0.1.0.x:
37407 - Fix a possible double-free in tor_gzip_uncompress().
37408 - When --disable-threads is set, do not search for or link against
37409 pthreads libraries.
37410 - Don't trigger an assert if an authoritative directory server
37411 claims its dirport is 0.
37412 - Fix bug with removing Tor as an NT service: some people were
37413 getting "The service did not return an error." Thanks to Matt
37417 Changes in version 0.1.1.2-alpha - 2005-07-15
37418 o New directory servers:
37419 - tor26 has changed IP address.
37421 o Bugfixes on 0.1.0.x, crashes/leaks:
37422 - Port the servers-not-obeying-their-exit-policies fix from
37424 - Fix an fd leak in start_daemon().
37425 - On Windows, you can't always reopen a port right after you've
37426 closed it. So change retry_listeners() to only close and re-open
37427 ports that have changed.
37428 - Fix a possible double-free in tor_gzip_uncompress().
37430 o Bugfixes on 0.1.0.x, usability:
37431 - When tor_socketpair() fails in Windows, give a reasonable
37432 Windows-style errno back.
37433 - Let people type "tor --install" as well as "tor -install" when
37435 want to make it an NT service.
37436 - NT service patch from Matt Edman to improve error messages.
37437 - When the controller asks for a config option with an abbreviated
37438 name, give the full name in our response.
37439 - Correct the man page entry on TrackHostExitsExpire.
37440 - Looks like we were never delivering deflated (i.e. compressed)
37441 running-routers lists, even when asked. Oops.
37442 - When --disable-threads is set, do not search for or link against
37443 pthreads libraries.
37445 o Bugfixes on 0.1.1.x:
37446 - Fix a seg fault with autodetecting which controller version is
37450 - New hidden service descriptor format: put a version in it, and
37451 let people specify introduction/rendezvous points that aren't
37452 in "the directory" (which is subjective anyway).
37453 - Allow the DEBUG controller event to work again. Mark certain log
37454 entries as "don't tell this to controllers", so we avoid cycles.
37457 Changes in version 0.1.0.11 - 2005-06-30
37458 o Bugfixes on 0.1.0.x:
37459 - Fix major security bug: servers were disregarding their
37460 exit policies if clients behaved unexpectedly.
37461 - Make OS X init script check for missing argument, so we don't
37462 confuse users who invoke it incorrectly.
37463 - Fix a seg fault in "tor --hash-password foo".
37464 - The MAPADDRESS control command was broken.
37467 Changes in version 0.1.1.1-alpha - 2005-06-29
37469 - Make OS X init script check for missing argument, so we don't
37470 confuse users who invoke it incorrectly.
37471 - Fix a seg fault in "tor --hash-password foo".
37472 - Fix a possible way to DoS dirservers.
37473 - When we complain that your exit policy implicitly allows local or
37474 private address spaces, name them explicitly so operators can
37476 - Make the log message less scary when all the dirservers are
37477 temporarily unreachable.
37478 - We were printing the number of idle dns workers incorrectly when
37482 - Revised controller protocol (version 1) that uses ascii rather
37483 than binary. Add supporting libraries in python and java so you
37484 can use the controller from your applications without caring how
37485 our protocol works.
37486 - Spiffy new support for crypto hardware accelerators. Can somebody
37490 Changes in version 0.0.9.10 - 2005-06-16
37491 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
37492 - Refuse relay cells that claim to have a length larger than the
37493 maximum allowed. This prevents a potential attack that could read
37494 arbitrary memory (e.g. keys) from an exit server's process
37498 Changes in version 0.1.0.10 - 2005-06-14
37499 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
37500 libevent before 1.1a.
37503 Changes in version 0.1.0.9-rc - 2005-06-09
37505 - Reset buf->highwater every time buf_shrink() is called, not just on
37506 a successful shrink. This was causing significant memory bloat.
37507 - Fix buffer overflow when checking hashed passwords.
37508 - Security fix: if seeding the RNG on Win32 fails, quit.
37509 - Allow seeding the RNG on Win32 even when you're not running as
37511 - Disable threading on Solaris too. Something is wonky with it,
37512 cpuworkers, and reentrant libs.
37513 - Reenable the part of the code that tries to flush as soon as an
37514 OR outbuf has a full TLS record available. Perhaps this will make
37515 OR outbufs not grow as huge except in rare cases, thus saving lots
37516 of CPU time plus memory.
37517 - Reject malformed .onion addresses rather then passing them on as
37518 normal web requests.
37519 - Adapt patch from Adam Langley: fix possible memory leak in
37520 tor_lookup_hostname().
37521 - Initialize libevent later in the startup process, so the logs are
37522 already established by the time we start logging libevent warns.
37523 - Use correct errno on win32 if libevent fails.
37524 - Check and warn about known-bad/slow libevent versions.
37525 - Pay more attention to the ClientOnly config option.
37526 - Have torctl.in/tor.sh.in check for location of su binary (needed
37528 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
37529 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
37530 HttpProxyAuthenticator
37531 - Stop warning about sigpipes in the logs. We're going to
37532 pretend that getting these occasionally is normal and fine.
37533 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
37535 installer screens; and don't put stuff into StartupItems unless
37536 the user asks you to.
37537 - Require servers that use the default dirservers to have public IP
37538 addresses. We have too many servers that are configured with private
37539 IPs and their admins never notice the log entries complaining that
37540 their descriptors are being rejected.
37541 - Add OSX uninstall instructions. An actual uninstall script will
37545 Changes in version 0.1.0.8-rc - 2005-05-23
37547 - It turns out that kqueue on OS X 10.3.9 was causing kernel
37548 panics. Disable kqueue on all OS X Tors.
37549 - Fix RPM: remove duplicate line accidentally added to the rpm
37551 - Disable threads on openbsd too, since its gethostaddr is not
37553 - Tolerate libevent 0.8 since it still works, even though it's
37555 - Enable building on Red Hat 9.0 again.
37556 - Allow the middle hop of the testing circuit to be running any
37557 version, now that most of them have the bugfix to let them connect
37558 to unknown servers. This will allow reachability testing to work
37559 even when 0.0.9.7-0.0.9.9 become obsolete.
37560 - Handle relay cells with rh.length too large. This prevents
37561 a potential attack that could read arbitrary memory (maybe even
37562 keys) from the exit server's process.
37563 - We screwed up the dirport reachability testing when we don't yet
37564 have a cached version of the directory. Hopefully now fixed.
37565 - Clean up router_load_single_router() (used by the controller),
37566 so it doesn't seg fault on error.
37567 - Fix a minor memory leak when somebody establishes an introduction
37568 point at your Tor server.
37569 - If a socks connection ends because read fails, don't warn that
37570 you're not sending a socks reply back.
37573 - Add HttpProxyAuthenticator config option too, that works like
37574 the HttpsProxyAuthenticator config option.
37575 - Encode hashed controller passwords in hex instead of base64,
37576 to make it easier to write controllers.
37579 Changes in version 0.1.0.7-rc - 2005-05-17
37581 - Fix a bug in the OS X package installer that prevented it from
37582 installing on Tiger.
37583 - Fix a script bug in the OS X package installer that made it
37584 complain during installation.
37585 - Find libevent even if it's hiding in /usr/local/ and your
37586 CFLAGS and LDFLAGS don't tell you to look there.
37587 - Be able to link with libevent as a shared library (the default
37588 after 1.0d), even if it's hiding in /usr/local/lib and even
37589 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
37590 assuming you're running gcc. Otherwise fail and give a useful
37592 - Fix a bug in the RPM packager: set home directory for _tor to
37593 something more reasonable when first installing.
37594 - Free a minor amount of memory that is still reachable on exit.
37597 Changes in version 0.1.0.6-rc - 2005-05-14
37599 - Implement --disable-threads configure option. Disable threads on
37600 netbsd by default, because it appears to have no reentrant resolver
37602 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
37603 release (1.1) detects and disables kqueue if it's broken.
37604 - Append default exit policy before checking for implicit internal
37605 addresses. Now we don't log a bunch of complaints on startup
37606 when using the default exit policy.
37607 - Some people were putting "Address " in their torrc, and they had
37608 a buggy resolver that resolved " " to 0.0.0.0. Oops.
37609 - If DataDir is ~/.tor, and that expands to /.tor, then default to
37610 LOCALSTATEDIR/tor instead.
37611 - Fix fragmented-message bug in TorControl.py.
37612 - Resolve a minor bug which would prevent unreachable dirports
37613 from getting suppressed in the published descriptor.
37614 - When the controller gave us a new descriptor, we weren't resolving
37615 it immediately, so Tor would think its address was 0.0.0.0 until
37616 we fetched a new directory.
37617 - Fix an uppercase/lowercase case error in suppressing a bogus
37618 libevent warning on some Linuxes.
37621 - Begin scrubbing sensitive strings from logs by default. Turn off
37622 the config option SafeLogging if you need to do debugging.
37623 - Switch to a new buffer management algorithm, which tries to avoid
37624 reallocing and copying quite as much. In first tests it looks like
37625 it uses *more* memory on average, but less cpu.
37626 - First cut at support for "create-fast" cells. Clients can use
37627 these when extending to their first hop, since the TLS already
37628 provides forward secrecy and authentication. Not enabled on
37630 - When dirservers refuse a router descriptor, we now log its
37631 contactinfo, platform, and the poster's IP address.
37632 - Call tor_free_all instead of connections_free_all after forking, to
37633 save memory on systems that need to fork.
37634 - Whine at you if you're a server and you don't set your contactinfo.
37635 - Implement --verify-config command-line option to check if your torrc
37636 is valid without actually launching Tor.
37637 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
37638 rather than just rejecting it.
37641 Changes in version 0.1.0.5-rc - 2005-04-27
37643 - Stop trying to print a null pointer if an OR conn fails because
37644 we didn't like its cert.
37646 - Switch our internal buffers implementation to use a ring buffer,
37647 to hopefully improve performance for fast servers a lot.
37648 - Add HttpsProxyAuthenticator support (basic auth only), based
37649 on patch from Adam Langley.
37650 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
37651 the fast servers that have been joining lately.
37652 - Give hidden service accesses extra time on the first attempt,
37653 since 60 seconds is often only barely enough. This might improve
37655 - Improve performance for dirservers: stop re-parsing the whole
37656 directory every time you regenerate it.
37657 - Add more debugging info to help us find the weird dns freebsd
37658 pthreads bug; cleaner debug messages to help track future issues.
37661 Changes in version 0.0.9.9 - 2005-04-23
37662 o Bugfixes on 0.0.9.x:
37663 - If unofficial Tor clients connect and send weird TLS certs, our
37664 Tor server triggers an assert. This release contains a minimal
37665 backport from the broader fix that we put into 0.1.0.4-rc.
37668 Changes in version 0.1.0.4-rc - 2005-04-23
37670 - If unofficial Tor clients connect and send weird TLS certs, our
37671 Tor server triggers an assert. Stop asserting, and start handling
37672 TLS errors better in other situations too.
37673 - When the controller asks us to tell it about all the debug-level
37674 logs, it turns out we were generating debug-level logs while
37675 telling it about them, which turns into a bad loop. Now keep
37676 track of whether you're sending a debug log to the controller,
37677 and don't log when you are.
37678 - Fix the "postdescriptor" feature of the controller interface: on
37679 non-complete success, only say "done" once.
37681 - Clients are now willing to load balance over up to 2mB, not 1mB,
37682 of advertised bandwidth capacity.
37683 - Add a NoPublish config option, so you can be a server (e.g. for
37684 testing running Tor servers in other Tor networks) without
37685 publishing your descriptor to the primary dirservers.
37688 Changes in version 0.1.0.3-rc - 2005-04-08
37689 o Improvements on 0.1.0.2-rc:
37690 - Client now retries when streams end early for 'hibernating' or
37691 'resource limit' reasons, rather than failing them.
37692 - More automated handling for dirserver operators:
37693 - Automatically approve nodes running 0.1.0.2-rc or later,
37694 now that the the reachability detection stuff is working.
37695 - Now we allow two unverified servers with the same nickname
37696 but different keys. But if a nickname is verified, only that
37697 nickname+key are allowed.
37698 - If you're an authdirserver connecting to an address:port,
37699 and it's not the OR you were expecting, forget about that
37700 descriptor. If he *was* the one you were expecting, then forget
37701 about all other descriptors for that address:port.
37702 - Allow servers to publish descriptors from 12 hours in the future.
37703 Corollary: only whine about clock skew from the dirserver if
37704 he's a trusted dirserver (since now even verified servers could
37705 have quite wrong clocks).
37706 - Adjust maximum skew and age for rendezvous descriptors: let skew
37707 be 48 hours rather than 90 minutes.
37708 - Efficiency improvements:
37709 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
37710 it much faster to look up a circuit for each relay cell.
37711 - Remove most calls to assert_all_pending_dns_resolves_ok(),
37712 since they're eating our cpu on exit nodes.
37713 - Stop wasting time doing a case insensitive comparison for every
37714 dns name every time we do any lookup. Canonicalize the names to
37715 lowercase and be done with it.
37716 - Start sending 'truncated' cells back rather than destroy cells,
37717 if the circuit closes in front of you. This means we won't have
37718 to abandon partially built circuits.
37719 - Only warn once per nickname from add_nickname_list_to_smartlist
37720 per failure, so an entrynode or exitnode choice that's down won't
37722 - Put a note in the torrc about abuse potential with the default
37724 - Revise control spec and implementation to allow all log messages to
37725 be sent to controller with their severities intact (suggested by
37726 Matt Edman). Update TorControl to handle new log event types.
37727 - Provide better explanation messages when controller's POSTDESCRIPTOR
37729 - Stop putting nodename in the Platform string in server descriptors.
37730 It doesn't actually help, and it is confusing/upsetting some people.
37732 o Bugfixes on 0.1.0.2-rc:
37733 - We were printing the host mask wrong in exit policies in server
37734 descriptors. This isn't a critical bug though, since we were still
37735 obeying the exit policy internally.
37736 - Fix Tor when compiled with libevent but without pthreads: move
37737 connection_unregister() from _connection_free() to
37739 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
37740 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
37741 when we look through the connection array, we'll find any of the
37742 cpu/dnsworkers. This is no good.
37744 o Bugfixes on 0.0.9.8:
37745 - Fix possible bug on threading platforms (e.g. win32) which was
37746 leaking a file descriptor whenever a cpuworker or dnsworker died.
37747 - When using preferred entry or exit nodes, ignore whether the
37748 circuit wants uptime or capacity. They asked for the nodes, they
37750 - chdir() to your datadirectory at the *end* of the daemonize process,
37751 not the beginning. This was a problem because the first time you
37752 run tor, if your datadir isn't there, and you have runasdaemon set
37753 to 1, it will try to chdir to it before it tries to create it. Oops.
37754 - Handle changed router status correctly when dirserver reloads
37755 fingerprint file. We used to be dropping all unverified descriptors
37756 right then. The bug was hidden because we would immediately
37757 fetch a directory from another dirserver, which would include the
37758 descriptors we just dropped.
37759 - When we're connecting to an OR and he's got a different nickname/key
37760 than we were expecting, only complain loudly if we're an OP or a
37761 dirserver. Complaining loudly to the OR admins just confuses them.
37762 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
37763 artificially capped at 500kB.
37766 Changes in version 0.0.9.8 - 2005-04-07
37767 o Bugfixes on 0.0.9.x:
37768 - We have a bug that I haven't found yet. Sometimes, very rarely,
37769 cpuworkers get stuck in the 'busy' state, even though the cpuworker
37770 thinks of itself as idle. This meant that no new circuits ever got
37771 established. Here's a workaround to kill any cpuworker that's been
37772 busy for more than 100 seconds.
37775 Changes in version 0.1.0.2-rc - 2005-04-01
37776 o Bugfixes on 0.1.0.1-rc:
37777 - Fixes on reachability detection:
37778 - Don't check for reachability while hibernating.
37779 - If ORPort is reachable but DirPort isn't, still publish the
37780 descriptor, but zero out DirPort until it's found reachable.
37781 - When building testing circs for ORPort testing, use only
37782 high-bandwidth nodes, so fewer circuits fail.
37783 - Complain about unreachable ORPort separately from unreachable
37784 DirPort, so the user knows what's going on.
37785 - Make sure we only conclude ORPort reachability if we didn't
37786 initiate the conn. Otherwise we could falsely conclude that
37787 we're reachable just because we connected to the guy earlier
37788 and he used that same pipe to extend to us.
37789 - Authdirservers shouldn't do ORPort reachability detection,
37790 since they're in clique mode, so it will be rare to find a
37791 server not already connected to them.
37792 - When building testing circuits, always pick middle hops running
37793 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
37794 bug. (This is a kludge; it will go away when 0.0.9.x becomes
37796 - When we decide we're reachable, actually publish our descriptor
37798 - Fix bug in redirectstream in the controller.
37799 - Fix the state descriptor strings so logs don't claim edge streams
37800 are in a different state than they actually are.
37801 - Use recent libevent features when possible (this only really affects
37802 win32 and osx right now, because the new libevent with these
37803 features hasn't been released yet). Add code to suppress spurious
37805 - Prevent possible segfault in connection_close_unattached_ap().
37806 - Fix newlines on torrc in win32.
37807 - Improve error msgs when tor-resolve fails.
37809 o Improvements on 0.0.9.x:
37810 - New experimental script tor/contrib/ExerciseServer.py (needs more
37811 work) that uses the controller interface to build circuits and
37812 fetch pages over them. This will help us bootstrap servers that
37813 have lots of capacity but haven't noticed it yet.
37814 - New experimental script tor/contrib/PathDemo.py (needs more work)
37815 that uses the controller interface to let you choose whole paths
37817 "<hostname>.<path,separated by dots>.<length of path>.path"
37818 - When we've connected to an OR and handshaked but didn't like
37819 the result, we were closing the conn without sending destroy
37820 cells back for pending circuits. Now send those destroys.
37823 Changes in version 0.0.9.7 - 2005-04-01
37824 o Bugfixes on 0.0.9.x:
37825 - Fix another race crash bug (thanks to Glenn Fink for reporting).
37826 - Compare identity to identity, not to nickname, when extending to
37827 a router not already in the directory. This was preventing us from
37828 extending to unknown routers. Oops.
37829 - Make sure to create OS X Tor user in <500 range, so we aren't
37830 creating actual system users.
37831 - Note where connection-that-hasn't-sent-end was marked, and fix
37832 a few really loud instances of this harmless bug (it's fixed more
37836 Changes in version 0.1.0.1-rc - 2005-03-28
37838 - Add reachability testing. Your Tor server will automatically try
37839 to see if its ORPort and DirPort are reachable from the outside,
37840 and it won't upload its descriptor until it decides they are.
37841 - Handle unavailable hidden services better. Handle slow or busy
37842 hidden services better.
37843 - Add support for CONNECTing through https proxies, with "HttpsProxy"
37845 - New exit policy: accept most low-numbered ports, rather than
37846 rejecting most low-numbered ports.
37847 - More Tor controller support (still experimental). See
37848 http://tor.eff.org/doc/control-spec.txt for all the new features,
37849 including signals to emulate unix signals from any platform;
37850 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
37851 closestream; closecircuit; etc.
37852 - Make nt services work and start on startup on win32 (based on
37853 patch by Matt Edman).
37854 - Add a new AddressMap config directive to rewrite incoming socks
37855 addresses. This lets you, for example, declare an implicit
37856 required exit node for certain sites.
37857 - Add a new TrackHostExits config directive to trigger addressmaps
37858 for certain incoming socks addresses -- for sites that break when
37859 your exit keeps changing (based on patch by Mike Perry).
37860 - Redo the client-side dns cache so it's just an addressmap too.
37861 - Notice when our IP changes, and reset stats/uptime/reachability.
37862 - When an application is using socks5, give him the whole variety of
37863 potential socks5 responses (connect refused, host unreachable, etc),
37864 rather than just "success" or "failure".
37865 - A more sane version numbering system. See
37866 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
37867 - New contributed script "exitlist": a simple python script to
37868 parse directories and find Tor nodes that exit to listed
37870 - New contributed script "privoxy-tor-toggle" to toggle whether
37871 Privoxy uses Tor. Seems to be configured for Debian by default.
37872 - Report HTTP reasons to client when getting a response from directory
37873 servers -- so you can actually know what went wrong.
37874 - New config option MaxAdvertisedBandwidth which lets you advertise
37875 a low bandwidthrate (to not attract as many circuits) while still
37876 allowing a higher bandwidthrate in reality.
37878 o Robustness/stability fixes:
37879 - Make Tor use Niels Provos's libevent instead of its current
37880 poll-but-sometimes-select mess. This will let us use faster async
37881 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
37883 - pthread support now too. This was forced because when we forked,
37884 we ended up wasting a lot of duplicate ram over time. Also switch
37885 to foo_r versions of some library calls to allow reentry and
37887 - Better handling for heterogeneous / unreliable nodes:
37888 - Annotate circuits w/ whether they aim to contain high uptime nodes
37889 and/or high capacity nodes. When building circuits, choose
37891 - This means that every single node in an intro rend circuit,
37892 not just the last one, will have a minimum uptime.
37893 - New config option LongLivedPorts to indicate application streams
37894 that will want high uptime circuits.
37895 - Servers reset uptime when a dir fetch entirely fails. This
37896 hopefully reflects stability of the server's network connectivity.
37897 - If somebody starts his tor server in Jan 2004 and then fixes his
37898 clock, don't make his published uptime be a year.
37899 - Reset published uptime when you wake up from hibernation.
37900 - Introduce a notion of 'internal' circs, which are chosen without
37901 regard to the exit policy of the last hop. Intro and rendezvous
37902 circs must be internal circs, to avoid leaking information. Resolve
37903 and connect streams can use internal circs if they want.
37904 - New circuit pooling algorithm: make sure to have enough circs around
37905 to satisfy any predicted ports, and also make sure to have 2 internal
37906 circs around if we've required internal circs lately (and with high
37907 uptime if we've seen that lately too).
37908 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
37909 which describes how often we retry making new circuits if current
37910 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
37911 how long we're willing to make use of an already-dirty circuit.
37912 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
37913 circ as necessary, if there are any completed ones lying around
37914 when we try to launch one.
37915 - Make hidden services try to establish a rendezvous for 30 seconds,
37916 rather than for n (where n=3) attempts to build a circuit.
37917 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
37918 "ShutdownWaitLength".
37919 - Try to be more zealous about calling connection_edge_end when
37920 things go bad with edge conns in connection.c.
37921 - Revise tor-spec to add more/better stream end reasons.
37922 - Revise all calls to connection_edge_end to avoid sending "misc",
37923 and to take errno into account where possible.
37926 - Fix a race condition that can trigger an assert, when we have a
37927 pending create cell and an OR connection fails right then.
37928 - Fix several double-mark-for-close bugs, e.g. where we were finding
37929 a conn for a cell even if that conn is already marked for close.
37930 - Make sequence of log messages when starting on win32 with no config
37931 file more reasonable.
37932 - When choosing an exit node for a new non-internal circ, don't take
37933 into account whether it'll be useful for any pending x.onion
37934 addresses -- it won't.
37935 - Turn addr_policy_compare from a tristate to a quadstate; this should
37936 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
37937 for google.com" problem.
37938 - Make "platform" string in descriptor more accurate for Win32 servers,
37939 so it's not just "unknown platform".
37940 - Fix an edge case in parsing config options (thanks weasel).
37941 If they say "--" on the commandline, it's not an option.
37942 - Reject odd-looking addresses at the client (e.g. addresses that
37943 contain a colon), rather than having the server drop them because
37945 - tor-resolve requests were ignoring .exit if there was a working circuit
37946 they could use instead.
37947 - REUSEADDR on normal platforms means you can rebind to the port
37948 right after somebody else has let it go. But REUSEADDR on win32
37949 means to let you bind to the port _even when somebody else
37950 already has it bound_! So, don't do that on Win32.
37951 - Change version parsing logic: a version is "obsolete" if it is not
37952 recommended and (1) there is a newer recommended version in the
37953 same series, or (2) there are no recommended versions in the same
37954 series, but there are some recommended versions in a newer series.
37955 A version is "new" if it is newer than any recommended version in
37957 - Stop most cases of hanging up on a socks connection without sending
37961 - Require BandwidthRate to be at least 20kB/s for servers.
37962 - When a dirserver causes you to give a warn, mention which dirserver
37964 - New config option DirAllowPrivateAddresses for authdirservers.
37965 Now by default they refuse router descriptors that have non-IP or
37966 private-IP addresses.
37967 - Stop publishing socksport in the directory, since it's not
37968 actually meant to be public. For compatibility, publish a 0 there
37970 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
37971 smart" value, that is low for servers and high for clients.
37972 - If our clock jumps forward by 100 seconds or more, assume something
37973 has gone wrong with our network and abandon all not-yet-used circs.
37974 - Warn when exit policy implicitly allows local addresses.
37975 - If we get an incredibly skewed timestamp from a dirserver mirror
37976 that isn't a verified OR, don't warn -- it's probably him that's
37978 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
37979 cookies to disk and doesn't log each web request to disk. (Thanks
37980 to Brett Carrington for pointing this out.)
37981 - When a client asks us for a dir mirror and we don't have one,
37982 launch an attempt to get a fresh one.
37983 - If we're hibernating and we get a SIGINT, exit immediately.
37984 - Add --with-dmalloc ./configure option, to track memory leaks.
37985 - And try to free all memory on closing, so we can detect what
37987 - Cache local dns resolves correctly even when they're .exit
37989 - Give a better warning when some other server advertises an
37990 ORPort that is actually an apache running ssl.
37991 - Add "opt hibernating 1" to server descriptor to make it clearer
37992 whether the server is hibernating.
37995 Changes in version 0.0.9.6 - 2005-03-24
37996 o Bugfixes on 0.0.9.x (crashes and asserts):
37997 - Add new end stream reasons to maintenance branch. Fix bug where
37998 reason (8) could trigger an assert. Prevent bug from recurring.
37999 - Apparently win32 stat wants paths to not end with a slash.
38000 - Fix assert triggers in assert_cpath_layer_ok(), where we were
38001 blowing away the circuit that conn->cpath_layer points to, then
38002 checking to see if the circ is well-formed. Backport check to make
38003 sure we dont use the cpath on a closed connection.
38004 - Prevent circuit_resume_edge_reading_helper() from trying to package
38005 inbufs for marked-for-close streams.
38006 - Don't crash on hup if your options->address has become unresolvable.
38007 - Some systems (like OS X) sometimes accept() a connection and tell
38008 you the remote host is 0.0.0.0:0. If this happens, due to some
38009 other mis-features, we get confused; so refuse the conn for now.
38011 o Bugfixes on 0.0.9.x (other):
38012 - Fix harmless but scary "Unrecognized content encoding" warn message.
38013 - Add new stream error reason: TORPROTOCOL reason means "you are not
38014 speaking a version of Tor I understand; say bye-bye to your stream."
38015 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
38016 into the future, now that we are more tolerant of skew. This
38017 resolves a bug where a Tor server would refuse to cache a directory
38018 because all the directories it gets are too far in the future;
38019 yet the Tor server never logs any complaints about clock skew.
38020 - Mac packaging magic: make man pages useable, and do not overwrite
38021 existing torrc files.
38022 - Make OS X log happily to /var/log/tor/tor.log
38025 Changes in version 0.0.9.5 - 2005-02-22
38026 o Bugfixes on 0.0.9.x:
38027 - Fix an assert race at exit nodes when resolve requests fail.
38028 - Stop picking unverified dir mirrors--it only leads to misery.
38029 - Patch from Matt Edman to make NT services work better. Service
38030 support is still not compiled into the executable by default.
38031 - Patch from Dmitri Bely so the Tor service runs better under
38032 the win32 SYSTEM account.
38033 - Make tor-resolve actually work (?) on Win32.
38034 - Fix a sign bug when getrlimit claims to have 4+ billion
38035 file descriptors available.
38036 - Stop refusing to start when bandwidthburst == bandwidthrate.
38037 - When create cells have been on the onion queue more than five
38038 seconds, just send back a destroy and take them off the list.
38041 Changes in version 0.0.9.4 - 2005-02-03
38042 o Bugfixes on 0.0.9:
38043 - Fix an assert bug that took down most of our servers: when
38044 a server claims to have 1 GB of bandwidthburst, don't
38046 - Don't crash as badly if we have spawned the max allowed number
38047 of dnsworkers, or we're out of file descriptors.
38048 - Block more file-sharing ports in the default exit policy.
38049 - MaxConn is now automatically set to the hard limit of max
38050 file descriptors we're allowed (ulimit -n), minus a few for
38052 - Give a clearer message when servers need to raise their
38053 ulimit -n when they start running out of file descriptors.
38054 - SGI Compatibility patches from Jan Schaumann.
38055 - Tolerate a corrupt cached directory better.
38056 - When a dirserver hasn't approved your server, list which one.
38057 - Go into soft hibernation after 95% of the bandwidth is used,
38058 not 99%. This is especially important for daily hibernators who
38059 have a small accounting max. Hopefully it will result in fewer
38060 cut connections when the hard hibernation starts.
38061 - Load-balance better when using servers that claim more than
38062 800kB/s of capacity.
38063 - Make NT services work (experimental, only used if compiled in).
38066 Changes in version 0.0.9.3 - 2005-01-21
38067 o Bugfixes on 0.0.9:
38068 - Backport the cpu use fixes from main branch, so busy servers won't
38069 need as much processor time.
38070 - Work better when we go offline and then come back, or when we
38071 run Tor at boot before the network is up. We do this by
38072 optimistically trying to fetch a new directory whenever an
38073 application request comes in and we think we're offline -- the
38074 human is hopefully a good measure of when the network is back.
38075 - Backport some minimal hidserv bugfixes: keep rend circuits open as
38076 long as you keep using them; actually publish hidserv descriptors
38077 shortly after they change, rather than waiting 20-40 minutes.
38078 - Enable Mac startup script by default.
38079 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
38080 - When you update AllowUnverifiedNodes or FirewallPorts via the
38081 controller's setconf feature, we were always appending, never
38083 - When you update HiddenServiceDir via setconf, it was screwing up
38084 the order of reading the lines, making it fail.
38085 - Do not rewrite a cached directory back to the cache; otherwise we
38086 will think it is recent and not fetch a newer one on startup.
38087 - Workaround for webservers that lie about Content-Encoding: Tor
38088 now tries to autodetect compressed directories and compression
38089 itself. This lets us Proxypass dir fetches through apache.
38092 Changes in version 0.0.9.2 - 2005-01-04
38093 o Bugfixes on 0.0.9 (crashes and asserts):
38094 - Fix an assert on startup when the disk is full and you're logging
38096 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
38097 style address, then we'd crash.
38098 - Fix an assert trigger when the running-routers string we get from
38099 a dirserver is broken.
38100 - Make worker threads start and run on win32. Now win32 servers
38102 - Bandaid (not actually fix, but now it doesn't crash) an assert
38103 where the dns worker dies mysteriously and the main Tor process
38104 doesn't remember anything about the address it was resolving.
38106 o Bugfixes on 0.0.9 (Win32):
38107 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
38108 name out of the warning/assert messages.
38109 - Fix a superficial "unhandled error on read" bug on win32.
38110 - The win32 installer no longer requires a click-through for our
38111 license, since our Free Software license grants rights but does not
38113 - Win32: When connecting to a dirserver fails, try another one
38114 immediately. (This was already working for non-win32 Tors.)
38115 - Stop trying to parse $HOME on win32 when hunting for default
38117 - Make tor-resolve.c work on win32 by calling network_init().
38119 o Bugfixes on 0.0.9 (other):
38120 - Make 0.0.9.x build on Solaris again.
38121 - Due to a fencepost error, we were blowing away the \n when reporting
38122 confvalue items in the controller. So asking for multiple config
38123 values at once couldn't work.
38124 - When listing circuits that are pending on an opening OR connection,
38125 if we're an OR we were listing circuits that *end* at us as
38126 being pending on every listener, dns/cpu worker, etc. Stop that.
38127 - Dirservers were failing to create 'running-routers' or 'directory'
38128 strings if we had more than some threshold of routers. Fix them so
38129 they can handle any number of routers.
38130 - Fix a superficial "Duplicate mark for close" bug.
38131 - Stop checking for clock skew for OR connections, even for servers.
38132 - Fix a fencepost error that was chopping off the last letter of any
38133 nickname that is the maximum allowed nickname length.
38134 - Update URLs in log messages so they point to the new website.
38135 - Fix a potential problem in mangling server private keys while
38136 writing to disk (not triggered yet, as far as we know).
38137 - Include the licenses for other free software we include in Tor,
38138 now that we're shipping binary distributions more regularly.
38141 Changes in version 0.0.9.1 - 2004-12-15
38142 o Bugfixes on 0.0.9:
38143 - Make hibernation actually work.
38144 - Make HashedControlPassword config option work.
38145 - When we're reporting event circuit status to a controller,
38146 don't use the stream status code.
38149 Changes in version 0.0.9 - 2004-12-12
38151 - Clean up manpage and torrc.sample file.
38152 - Clean up severities and text of log warnings.
38154 - Make servers trigger an assert when they enter hibernation.
38157 Changes in version 0.0.9rc7 - 2004-12-08
38158 o Bugfixes on 0.0.9rc:
38159 - Fix a stack-trashing crash when an exit node begins hibernating.
38160 - Avoid looking at unallocated memory while considering which
38161 ports we need to build circuits to cover.
38162 - Stop a sigpipe: when an 'end' cell races with eof from the app,
38163 we shouldn't hold-open-until-flush if the eof arrived first.
38164 - Fix a bug with init_cookie_authentication() in the controller.
38165 - When recommending new-format log lines, if the upper bound is
38166 LOG_ERR, leave it implicit.
38168 o Bugfixes on 0.0.8.1:
38169 - Fix a whole slew of memory leaks.
38170 - Fix isspace() and friends so they still make Solaris happy
38171 but also so they don't trigger asserts on win32.
38172 - Fix parse_iso_time on platforms without strptime (eg win32).
38173 - win32: tolerate extra "readable" events better.
38174 - win32: when being multithreaded, leave parent fdarray open.
38175 - Make unit tests work on win32.
38178 Changes in version 0.0.9rc6 - 2004-12-06
38179 o Bugfixes on 0.0.9pre:
38180 - Clean up some more integer underflow opportunities (not exploitable
38182 - While hibernating, hup should not regrow our listeners.
38183 - Send an end to the streams we close when we hibernate, rather
38184 than just chopping them off.
38185 - React to eof immediately on non-open edge connections.
38187 o Bugfixes on 0.0.8.1:
38188 - Calculate timeout for waiting for a connected cell from the time
38189 we sent the begin cell, not from the time the stream started. If
38190 it took a long time to establish the circuit, we would time out
38191 right after sending the begin cell.
38192 - Fix router_compare_addr_to_addr_policy: it was not treating a port
38193 of * as always matching, so we were picking reject *:* nodes as
38194 exit nodes too. Oops.
38197 - New circuit building strategy: keep a list of ports that we've
38198 used in the past 6 hours, and always try to have 2 circuits open
38199 or on the way that will handle each such port. Seed us with port
38200 80 so web users won't complain that Tor is "slow to start up".
38201 - Make kill -USR1 dump more useful stats about circuits.
38202 - When warning about retrying or giving up, print the address, so
38203 the user knows which one it's talking about.
38204 - If you haven't used a clean circuit in an hour, throw it away,
38205 just to be on the safe side. (This means after 6 hours a totally
38206 unused Tor client will have no circuits open.)
38209 Changes in version 0.0.9rc5 - 2004-12-01
38210 o Bugfixes on 0.0.8.1:
38211 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
38212 - Let resolve conns retry/expire also, rather than sticking around
38214 - If we are using select, make sure we stay within FD_SETSIZE.
38216 o Bugfixes on 0.0.9pre:
38217 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
38218 but doesn't seem to be currently; thanks to Ilja van Sprundel for
38220 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
38221 instead. Impose minima and maxima for all *Period options; impose
38222 even tighter maxima for fetching if we are a caching dirserver.
38223 Clip rather than rejecting.
38224 - Fetch cached running-routers from servers that serve it (that is,
38225 authdirservers and servers running 0.0.9rc5-cvs or later.)
38228 - Accept *:706 (silc) in default exit policy.
38229 - Implement new versioning format for post 0.1.
38230 - Support "foo.nickname.exit" addresses, to let Alice request the
38231 address "foo" as viewed by exit node "nickname". Based on a patch
38233 - Make tor --version --version dump the cvs Id of every file.
38236 Changes in version 0.0.9rc4 - 2004-11-28
38237 o Bugfixes on 0.0.8.1:
38238 - Make windows sockets actually non-blocking (oops), and handle
38239 win32 socket errors better.
38241 o Bugfixes on 0.0.9rc1:
38242 - Actually catch the -USR2 signal.
38245 Changes in version 0.0.9rc3 - 2004-11-25
38246 o Bugfixes on 0.0.8.1:
38247 - Flush the log file descriptor after we print "Tor opening log file",
38248 so we don't see those messages days later.
38250 o Bugfixes on 0.0.9rc1:
38251 - Make tor-resolve work again.
38252 - Avoid infinite loop in tor-resolve if tor hangs up on it.
38253 - Fix an assert trigger for clients/servers handling resolves.
38256 Changes in version 0.0.9rc2 - 2004-11-24
38257 o Bugfixes on 0.0.9rc1:
38258 - I broke socks5 support while fixing the eof bug.
38259 - Allow unitless bandwidths and intervals; they default to bytes
38261 - New servers don't start out hibernating; they are active until
38262 they run out of bytes, so they have a better estimate of how
38263 long it takes, and so their operators can know they're working.
38266 Changes in version 0.0.9rc1 - 2004-11-23
38267 o Bugfixes on 0.0.8.1:
38268 - Finally fix a bug that's been plaguing us for a year:
38269 With high load, circuit package window was reaching 0. Whenever
38270 we got a circuit-level sendme, we were reading a lot on each
38271 socket, but only writing out a bit. So we would eventually reach
38272 eof. This would be noticed and acted on even when there were still
38273 bytes sitting in the inbuf.
38274 - When poll() is interrupted, we shouldn't believe the revents values.
38276 o Bugfixes on 0.0.9pre6:
38277 - Fix hibernate bug that caused pre6 to be broken.
38278 - Don't keep rephist info for routers that haven't had activity for
38279 24 hours. (This matters now that clients have keys, since we track
38281 - Never call close_temp_logs while validating log options.
38282 - Fix backslash-escaping on tor.sh.in and torctl.in.
38285 - Implement weekly/monthly/daily accounting: now you specify your
38286 hibernation properties by
38287 AccountingMax N bytes|KB|MB|GB|TB
38288 AccountingStart day|week|month [day] HH:MM
38289 Defaults to "month 1 0:00".
38290 - Let bandwidth and interval config options be specified as 5 bytes,
38291 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
38292 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
38293 get back to normal.)
38294 - If your requested entry or exit node has advertised bandwidth 0,
38296 - Be more greedy about filling up relay cells -- we try reading again
38297 once we've processed the stuff we read, in case enough has arrived
38298 to fill the last cell completely.
38299 - Apply NT service patch from Osamu Fujino. Still needs more work.
38302 Changes in version 0.0.9pre6 - 2004-11-15
38303 o Bugfixes on 0.0.8.1:
38304 - Fix assert failure on malformed socks4a requests.
38305 - Use identity comparison, not nickname comparison, to choose which
38306 half of circuit-ID-space each side gets to use. This is needed
38307 because sometimes we think of a router as a nickname, and sometimes
38308 as a hex ID, and we can't predict what the other side will do.
38309 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
38310 write() call will fail and we handle it there.
38311 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
38312 and smartlist_len, which are two major profiling offenders.
38314 o Bugfixes on 0.0.9pre5:
38315 - Fix a bug in read_all that was corrupting config files on windows.
38316 - When we're raising the max number of open file descriptors to
38317 'unlimited', don't log that we just raised it to '-1'.
38318 - Include event code with events, as required by control-spec.txt.
38319 - Don't give a fingerprint when clients do --list-fingerprint:
38320 it's misleading, because it will never be the same again.
38321 - Stop using strlcpy in tor_strndup, since it was slowing us
38323 - Remove warn on startup about missing cached-directory file.
38324 - Make kill -USR1 work again.
38325 - Hibernate if we start tor during the "wait for wakeup-time" phase
38326 of an accounting interval. Log our hibernation plans better.
38327 - Authoritative dirservers now also cache their directory, so they
38328 have it on start-up.
38331 - Fetch running-routers; cache running-routers; compress
38332 running-routers; serve compressed running-routers.z
38333 - Add NSI installer script contributed by J Doe.
38334 - Commit VC6 and VC7 workspace/project files.
38335 - Commit a tor.spec for making RPM files, with help from jbash.
38336 - Add contrib/torctl.in contributed by Glenn Fink.
38337 - Implement the control-spec's SAVECONF command, to write your
38338 configuration to torrc.
38339 - Get cookie authentication for the controller closer to working.
38340 - Include control-spec.txt in the tarball.
38341 - When set_conf changes our server descriptor, upload a new copy.
38342 But don't upload it too often if there are frequent changes.
38343 - Document authentication config in man page, and document signals
38345 - Clean up confusing parts of man page and torrc.sample.
38346 - Make expand_filename handle ~ and ~username.
38347 - Use autoconf to enable largefile support where necessary. Use
38348 ftello where available, since ftell can fail at 2GB.
38349 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
38350 log more informatively.
38351 - Give a slightly more useful output for "tor -h".
38352 - Refuse application socks connections to port 0.
38353 - Check clock skew for verified servers, but allow unverified
38354 servers and clients to have any clock skew.
38355 - Break DirFetchPostPeriod into:
38356 - DirFetchPeriod for fetching full directory,
38357 - StatusFetchPeriod for fetching running-routers,
38358 - DirPostPeriod for posting server descriptor,
38359 - RendPostPeriod for posting hidden service descriptors.
38360 - Make sure the hidden service descriptors are at a random offset
38361 from each other, to hinder linkability.
38364 Changes in version 0.0.9pre5 - 2004-11-09
38365 o Bugfixes on 0.0.9pre4:
38366 - Fix a seg fault in unit tests (doesn't affect main program).
38367 - Fix an assert bug where a hidden service provider would fail if
38368 the first hop of his rendezvous circuit was down.
38369 - Hidden service operators now correctly handle version 1 style
38370 INTRODUCE1 cells (nobody generates them still, so not a critical
38372 - If do_hup fails, actually notice.
38373 - Handle more errnos from accept() without closing the listener.
38374 Some OpenBSD machines were closing their listeners because
38375 they ran out of file descriptors.
38376 - Send resolve cells to exit routers that are running a new
38377 enough version of the resolve code to work right.
38378 - Better handling of winsock includes on non-MSV win32 compilers.
38379 - Some people had wrapped their tor client/server in a script
38380 that would restart it whenever it died. This did not play well
38381 with our "shut down if your version is obsolete" code. Now people
38382 don't fetch a new directory if their local cached version is
38384 - Make our autogen.sh work on ksh as well as bash.
38387 - Hibernation: New config option "AccountingMaxKB" lets you
38388 set how many KBytes per month you want to allow your server to
38389 consume. Rather than spreading those bytes out evenly over the
38390 month, we instead hibernate for some of the month and pop up
38391 at a deterministic time, work until the bytes are consumed, then
38392 hibernate again. Config option "MonthlyAccountingStart" lets you
38393 specify which day of the month your billing cycle starts on.
38394 - Control interface: a separate program can now talk to your
38395 client/server over a socket, and get/set config options, receive
38396 notifications of circuits and streams starting/finishing/dying,
38397 bandwidth used, etc. The next step is to get some GUIs working.
38398 Let us know if you want to help out. See doc/control-spec.txt .
38399 - Ship a contrib/tor-control.py as an example script to interact
38400 with the control port.
38401 - "tor --hash-password zzyxz" will output a salted password for
38402 use in authenticating to the control interface.
38403 - New log format in config:
38404 "Log minsev[-maxsev] stdout|stderr|syslog" or
38405 "Log minsev[-maxsev] file /var/foo"
38408 - DirPolicy config option, to let people reject incoming addresses
38409 from their dirserver.
38410 - "tor --list-fingerprint" will list your identity key fingerprint
38412 - Add "pass" target for RedirectExit, to make it easier to break
38413 out of a sequence of RedirectExit rules.
38414 - Clients now generate a TLS cert too, in preparation for having
38415 them act more like real nodes.
38416 - Ship src/win32/ in the tarball, so people can use it to build.
38417 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
38419 - New "router-status" line in directory, to better bind each verified
38420 nickname to its identity key.
38421 - Deprecate unofficial config option abbreviations, and abbreviations
38422 not on the command line.
38423 - Add a pure-C tor-resolve implementation.
38424 - Use getrlimit and friends to ensure we can reach MaxConn (currently
38425 1024) file descriptors.
38427 o Code security improvements, inspired by Ilja:
38428 - Replace sprintf with snprintf. (I think they were all safe, but
38430 - Replace strcpy/strncpy with strlcpy in more places.
38431 - Avoid strcat; use snprintf or strlcat instead.
38432 - snprintf wrapper with consistent (though not C99) overflow behavior.
38435 Changes in version 0.0.9pre4 - 2004-10-17
38436 o Bugfixes on 0.0.9pre3:
38437 - If the server doesn't specify an exit policy, use the real default
38438 exit policy, not reject *:*.
38439 - Ignore fascistfirewall when uploading/downloading hidden service
38440 descriptors, since we go through Tor for those; and when using
38441 an HttpProxy, since we assume it can reach them all.
38442 - When looking for an authoritative dirserver, use only the ones
38443 configured at boot. Don't bother looking in the directory.
38444 - The rest of the fix for get_default_conf_file() on older win32.
38445 - Make 'Routerfile' config option obsolete.
38448 - New 'MyFamily nick1,...' config option for a server to
38449 specify other servers that shouldn't be used in the same circuit
38450 with it. Only believed if nick1 also specifies us.
38451 - New 'NodeFamily nick1,nick2,...' config option for a client to
38452 specify nodes that it doesn't want to use in the same circuit.
38453 - New 'Redirectexit pattern address:port' config option for a
38454 server to redirect exit connections, e.g. to a local squid.
38457 Changes in version 0.0.9pre3 - 2004-10-13
38458 o Bugfixes on 0.0.8.1:
38459 - Better torrc example lines for dirbindaddress and orbindaddress.
38460 - Improved bounds checking on parsed ints (e.g. config options and
38461 the ones we find in directories.)
38462 - Better handling of size_t vs int, so we're more robust on 64
38464 - Fix the rest of the bug where a newly started OR would appear
38465 as unverified even after we've added his fingerprint and hupped
38467 - Fix a bug from 0.0.7: when read() failed on a stream, we would
38468 close it without sending back an end. So 'connection refused'
38469 would simply be ignored and the user would get no response.
38471 o Bugfixes on 0.0.9pre2:
38472 - Serving the cached-on-disk directory to people is bad. We now
38473 provide no directory until we've fetched a fresh one.
38474 - Workaround for bug on windows where cached-directories get crlf
38476 - Make get_default_conf_file() work on older windows too.
38477 - If we write a *:* exit policy line in the descriptor, don't write
38478 any more exit policy lines.
38481 - Use only 0.0.9pre1 and later servers for resolve cells.
38482 - Make the dirservers file obsolete.
38483 - Include a dir-signing-key token in directories to tell the
38484 parsing entity which key is being used to sign.
38485 - Remove the built-in bulky default dirservers string.
38486 - New config option "Dirserver %s:%d [fingerprint]", which can be
38487 repeated as many times as needed. If no dirservers specified,
38488 default to moria1,moria2,tor26.
38489 - Make moria2 advertise a dirport of 80, so people behind firewalls
38490 will be able to get a directory.
38491 - Http proxy support
38492 - Dirservers translate requests for http://%s:%d/x to /x
38493 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
38494 be routed through this host.
38495 - Clients ask for /tor/x rather than /x for new enough dirservers.
38496 This way we can one day coexist peacefully with apache.
38497 - Clients specify a "Host: %s%d" http header, to be compatible
38498 with more proxies, and so running squid on an exit node can work.
38501 Changes in version 0.0.8.1 - 2004-10-13
38503 - Fix a seg fault that can be triggered remotely for Tor
38504 clients/servers with an open dirport.
38505 - Fix a rare assert trigger, where routerinfos for entries in
38506 our cpath would expire while we're building the path.
38507 - Fix a bug in OutboundBindAddress so it (hopefully) works.
38508 - Fix a rare seg fault for people running hidden services on
38509 intermittent connections.
38510 - Fix a bug in parsing opt keywords with objects.
38511 - Fix a stale pointer assert bug when a stream detaches and
38513 - Fix a string format vulnerability (probably not exploitable)
38514 in reporting stats locally.
38515 - Fix an assert trigger: sometimes launching circuits can fail
38516 immediately, e.g. because too many circuits have failed recently.
38517 - Fix a compile warning on 64 bit platforms.
38520 Changes in version 0.0.9pre2 - 2004-10-03
38522 - Make fetching a cached directory work for 64-bit platforms too.
38523 - Make zlib.h a required header, not an optional header.
38526 Changes in version 0.0.9pre1 - 2004-10-01
38528 - Stop using separate defaults for no-config-file and
38529 empty-config-file. Now you have to explicitly turn off SocksPort,
38530 if you don't want it open.
38531 - Fix a bug in OutboundBindAddress so it (hopefully) works.
38532 - Improve man page to mention more of the 0.0.8 features.
38533 - Fix a rare seg fault for people running hidden services on
38534 intermittent connections.
38535 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
38537 - Fix more dns related bugs: send back resolve_failed and end cells
38538 more reliably when the resolve fails, rather than closing the
38539 circuit and then trying to send the cell. Also attach dummy resolve
38540 connections to a circuit *before* calling dns_resolve(), to fix
38541 a bug where cached answers would never be sent in RESOLVED cells.
38542 - When we run out of disk space, or other log writing error, don't
38543 crash. Just stop logging to that log and continue.
38544 - We were starting to daemonize before we opened our logs, so if
38545 there were any problems opening logs, we would complain to stderr,
38546 which wouldn't work, and then mysteriously exit.
38547 - Fix a rare bug where sometimes a verified OR would connect to us
38548 before he'd uploaded his descriptor, which would cause us to
38549 assign conn->nickname as though he's unverified. Now we look through
38550 the fingerprint list to see if he's there.
38551 - Fix a rare assert trigger, where routerinfos for entries in
38552 our cpath would expire while we're building the path.
38555 - Clients can ask dirservers for /dir.z to get a compressed version
38556 of the directory. Only works for servers running 0.0.9, of course.
38557 - Make clients cache directories and use them to seed their router
38558 lists at startup. This means clients have a datadir again.
38559 - Configuration infrastructure support for warning on obsolete
38561 - Respond to content-encoding headers by trying to uncompress as
38563 - Reply with a deflated directory when a client asks for "dir.z".
38564 We could use allow-encodings instead, but allow-encodings isn't
38565 specified in HTTP 1.0.
38566 - Raise the max dns workers from 50 to 100.
38567 - Discourage people from setting their dirfetchpostperiod more often
38568 than once per minute.
38569 - Protect dirservers from overzealous descriptor uploading -- wait
38570 10 seconds after directory gets dirty, before regenerating.
38573 Changes in version 0.0.8 - 2004-08-25
38574 o Port it to SunOS 5.9 / Athena
38577 Changes in version 0.0.8rc2 - 2004-08-20
38578 o Make it compile on cygwin again.
38579 o When picking unverified routers, skip those with low uptime and/or
38580 low bandwidth, depending on what properties you care about.
38583 Changes in version 0.0.8rc1 - 2004-08-18
38584 o Changes from 0.0.7.3:
38586 - Fix assert triggers: if the other side returns an address 0.0.0.0,
38587 don't put it into the client dns cache.
38588 - If a begin failed due to exit policy, but we believe the IP address
38589 should have been allowed, switch that router to exitpolicy reject *:*
38590 until we get our next directory.
38592 - Clients choose nodes proportional to advertised bandwidth.
38593 - Avoid using nodes with low uptime as introduction points.
38594 - Handle servers with dynamic IP addresses: don't replace
38595 options->Address with the resolved one at startup, and
38596 detect our address right before we make a routerinfo each time.
38597 - 'FascistFirewall' option to pick dirservers and ORs on specific
38598 ports; plus 'FirewallPorts' config option to tell FascistFirewall
38599 which ports are open. (Defaults to 80,443)
38600 - Be more aggressive about trying to make circuits when the network
38601 has changed (e.g. when you unsuspend your laptop).
38602 - Check for time skew on http headers; report date in response to
38604 - If the entrynode config line has only one node, don't pick it as
38606 - Add strict{entry|exit}nodes config options. If set to 1, then
38607 we refuse to build circuits that don't include the specified entry
38609 - OutboundBindAddress config option, to bind to a specific
38610 IP address for outgoing connect()s.
38611 - End truncated log entries (e.g. directories) with "[truncated]".
38613 o Patches to 0.0.8preX:
38615 - Patches to compile and run on win32 again (maybe)?
38616 - Fix crash when looking for ~/.torrc with no $HOME set.
38617 - Fix a race bug in the unit tests.
38618 - Handle verified/unverified name collisions better when new
38619 routerinfo's arrive in a directory.
38620 - Sometimes routers were getting entered into the stats before
38621 we'd assigned their identity_digest. Oops.
38622 - Only pick and establish intro points after we've gotten a
38625 - AllowUnverifiedNodes config option to let circuits choose no-name
38626 routers in entry,middle,exit,introduction,rendezvous positions.
38627 Allow middle and rendezvous positions by default.
38628 - Add a man page for tor-resolve.
38631 Changes in version 0.0.7.3 - 2004-08-12
38632 o Stop dnsworkers from triggering an assert failure when you
38633 ask them to resolve the host "".
38636 Changes in version 0.0.8pre3 - 2004-08-09
38637 o Changes from 0.0.7.2:
38638 - Allow multiple ORs with same nickname in routerlist -- now when
38639 people give us one identity key for a nickname, then later
38640 another, we don't constantly complain until the first expires.
38641 - Remember used bandwidth (both in and out), and publish 15-minute
38642 snapshots for the past day into our descriptor.
38643 - You can now fetch $DIRURL/running-routers to get just the
38644 running-routers line, not the whole descriptor list. (But
38645 clients don't use this yet.)
38646 - When people mistakenly use Tor as an http proxy, point them
38647 at the tor-doc.html rather than the INSTALL.
38648 - Remove our mostly unused -- and broken -- hex_encode()
38649 function. Use base16_encode() instead. (Thanks to Timo Lindfors
38650 for pointing out this bug.)
38651 - Rotate onion keys every 12 hours, not every 2 hours, so we have
38652 fewer problems with people using the wrong key.
38653 - Change the default exit policy to reject the default edonkey,
38654 kazaa, gnutella ports.
38655 - Add replace_file() to util.[ch] to handle win32's rename().
38657 o Changes from 0.0.8preX:
38658 - Fix two bugs in saving onion keys to disk when rotating, so
38659 hopefully we'll get fewer people using old onion keys.
38660 - Fix an assert error that was making SocksPolicy not work.
38661 - Be willing to expire routers that have an open dirport -- it's
38662 just the authoritative dirservers we want to not forget.
38663 - Reject tor-resolve requests for .onion addresses early, so we
38664 don't build a whole rendezvous circuit and then fail.
38665 - When you're warning a server that he's unverified, don't cry
38666 wolf unpredictably.
38667 - Fix a race condition: don't try to extend onto a connection
38668 that's still handshaking.
38669 - For servers in clique mode, require the conn to be open before
38670 you'll choose it for your path.
38671 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
38672 end relay cell, etc.
38673 - Measure bandwidth capacity over the last 24 hours, not just 12
38674 - Bugfix: authoritative dirservers were making and signing a new
38675 directory for each client, rather than reusing the cached one.
38678 Changes in version 0.0.8pre2 - 2004-08-04
38679 o Changes from 0.0.7.2:
38681 - Check directory signature _before_ you decide whether you're
38682 you're running an obsolete version and should exit.
38683 - Check directory signature _before_ you parse the running-routers
38684 list to decide who's running or verified.
38685 - Bugfixes and features:
38686 - Check return value of fclose while writing to disk, so we don't
38687 end up with broken files when servers run out of disk space.
38688 - Log a warning if the user uses an unsafe socks variant, so people
38689 are more likely to learn about privoxy or socat.
38690 - Dirservers now include RFC1123-style dates in the HTTP headers,
38691 which one day we will use to better detect clock skew.
38693 o Changes from 0.0.8pre1:
38694 - Make it compile without warnings again on win32.
38695 - Log a warning if you're running an unverified server, to let you
38696 know you might want to get it verified.
38697 - Only pick a default nickname if you plan to be a server.
38700 Changes in version 0.0.8pre1 - 2004-07-23
38702 - Made our unit tests compile again on OpenBSD 3.5, and tor
38703 itself compile again on OpenBSD on a sparc64.
38704 - We were neglecting milliseconds when logging on win32, so
38705 everything appeared to happen at the beginning of each second.
38707 o Protocol changes:
38708 - 'Extend' relay cell payloads now include the digest of the
38709 intended next hop's identity key. Now we can verify that we're
38710 extending to the right router, and also extend to routers we
38711 hadn't heard of before.
38714 - Tor nodes can now act as relays (with an advertised ORPort)
38715 without being manually verified by the dirserver operators.
38716 - Uploaded descriptors of unverified routers are now accepted
38717 by the dirservers, and included in the directory.
38718 - Verified routers are listed by nickname in the running-routers
38719 list; unverified routers are listed as "$<fingerprint>".
38720 - We now use hash-of-identity-key in most places rather than
38721 nickname or addr:port, for improved security/flexibility.
38722 - To avoid Sybil attacks, paths still use only verified servers.
38723 But now we have a chance to play around with hybrid approaches.
38724 - Nodes track bandwidth usage to estimate capacity (not used yet).
38725 - ClientOnly option for nodes that never want to become servers.
38726 - Directory caching.
38727 - "AuthoritativeDir 1" option for the official dirservers.
38728 - Now other nodes (clients and servers) will cache the latest
38729 directory they've pulled down.
38730 - They can enable their DirPort to serve it to others.
38731 - Clients will pull down a directory from any node with an open
38732 DirPort, and check the signature/timestamp correctly.
38733 - Authoritative dirservers now fetch directories from other
38734 authdirservers, to stay better synced.
38735 - Running-routers list tells who's down also, along with noting
38736 if they're verified (listed by nickname) or unverified (listed
38738 - Allow dirservers to serve running-router list separately.
38739 This isn't used yet.
38740 - ORs connect-on-demand to other ORs
38741 - If you get an extend cell to an OR you're not connected to,
38742 connect, handshake, and forward the create cell.
38743 - The authoritative dirservers stay connected to everybody,
38744 and everybody stays connected to 0.0.7 servers, but otherwise
38745 clients/servers expire unused connections after 5 minutes.
38746 - When servers get a sigint, they delay 30 seconds (refusing new
38747 connections) then exit. A second sigint causes immediate exit.
38748 - File and name management:
38749 - Look for .torrc if no CONFDIR "torrc" is found.
38750 - If no datadir is defined, then choose, make, and secure ~/.tor
38752 - If torrc not found, exitpolicy reject *:*.
38753 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
38754 - If no nickname is defined, derive default from hostname.
38755 - Rename secret key files, e.g. identity.key -> secret_id_key,
38756 to discourage people from mailing their identity key to tor-ops.
38757 - Refuse to build a circuit before the directory has arrived --
38758 it won't work anyway, since you won't know the right onion keys
38760 - Try other dirservers immediately if the one you try is down. This
38761 should tolerate down dirservers better now.
38762 - Parse tor version numbers so we can do an is-newer-than check
38763 rather than an is-in-the-list check.
38764 - New socks command 'resolve', to let us shim gethostbyname()
38766 - A 'tor_resolve' script to access the socks resolve functionality.
38767 - A new socks-extensions.txt doc file to describe our
38768 interpretation and extensions to the socks protocols.
38769 - Add a ContactInfo option, which gets published in descriptor.
38770 - Publish OR uptime in descriptor (and thus in directory) too.
38771 - Write tor version at the top of each log file
38772 - New docs in the tarball:
38774 - Document that you should proxy your SSL traffic too.
38777 Changes in version 0.0.7.2 - 2004-07-07
38778 o A better fix for the 0.0.0.0 problem, that will hopefully
38779 eliminate the remaining related assertion failures.
38782 Changes in version 0.0.7.1 - 2004-07-04
38783 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
38784 since internally we use 0.0.0.0 to signify "not yet resolved".
38787 Changes in version 0.0.7 - 2004-06-07
38788 o Updated the man page to reflect the new features.
38791 Changes in version 0.0.7rc2 - 2004-06-06
38792 o Changes from 0.0.7rc1:
38793 - Make it build on Win32 again.
38794 o Changes from 0.0.6.2:
38795 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
38799 Changes in version 0.0.7rc1 - 2004-06-02
38801 - On sighup, we were adding another log without removing the first
38802 one. So log messages would get duplicated n times for n sighups.
38803 - Several cases of using a connection after we'd freed it. The
38804 problem was that connections that are pending resolve are in both
38805 the pending_resolve tree, and also the circuit's resolving_streams
38806 list. When you want to remove one, you must remove it from both.
38807 - Fix a double-mark-for-close where an end cell arrived for a
38808 resolving stream, and then the resolve failed.
38809 - Check directory signatures based on name of signer, not on whom
38810 we got the directory from. This will let us cache directories more
38813 - Crank up some of our constants to handle more users.
38816 Changes in version 0.0.7pre1 - 2004-06-02
38817 o Fixes for crashes and other obnoxious bugs:
38818 - Fix an epipe bug: sometimes when directory connections failed
38819 to connect, we would give them a chance to flush before closing
38821 - When we detached from a circuit because of resolvefailed, we
38822 would immediately try the same circuit twice more, and then
38823 give up on the resolve thinking we'd tried three different
38825 - Limit the number of intro circuits we'll attempt to build for a
38826 hidden service per 15-minute period.
38827 - Check recommended-software string *early*, before actually parsing
38828 the directory. Thus we can detect an obsolete version and exit,
38829 even if the new directory format doesn't parse.
38830 o Fixes for security bugs:
38831 - Remember which nodes are dirservers when you startup, and if a
38832 random OR enables his dirport, don't automatically assume he's
38833 a trusted dirserver.
38835 - Directory connections were asking the wrong poll socket to
38836 start writing, and not asking themselves to start writing.
38837 - When we detached from a circuit because we sent a begin but
38838 didn't get a connected, we would use it again the first time;
38839 but after that we would correctly switch to a different one.
38840 - Stop warning when the first onion decrypt attempt fails; they
38841 will sometimes legitimately fail now that we rotate keys.
38842 - Override unaligned-access-ok check when $host_cpu is ia64 or
38843 arm. Apparently they allow it but the kernel whines.
38844 - Dirservers try to reconnect periodically too, in case connections
38846 - Fix some memory leaks in directory servers.
38847 - Allow backslash in Win32 filenames.
38848 - Made Tor build complain-free on FreeBSD, hopefully without
38849 breaking other BSD builds. We'll see.
38851 - Doxygen markup on all functions and global variables.
38852 - Make directory functions update routerlist, not replace it. So
38853 now directory disagreements are not so critical a problem.
38854 - Remove the upper limit on number of descriptors in a dirserver's
38855 directory (not that we were anywhere close).
38856 - Allow multiple logfiles at different severity ranges.
38857 - Allow *BindAddress to specify ":port" rather than setting *Port
38858 separately. Allow multiple instances of each BindAddress config
38859 option, so you can bind to multiple interfaces if you want.
38860 - Allow multiple exit policy lines, which are processed in order.
38861 Now we don't need that huge line with all the commas in it.
38862 - Enable accept/reject policies on SOCKS connections, so you can bind
38863 to 0.0.0.0 but still control who can use your OP.
38866 Changes in version 0.0.6.2 - 2004-05-16
38867 o Our integrity-checking digest was checking only the most recent cell,
38868 not the previous cells like we'd thought.
38869 Thanks to Stefan Mark for finding the flaw!
38872 Changes in version 0.0.6.1 - 2004-05-06
38873 o Fix two bugs in our AES counter-mode implementation (this affected
38874 onion-level stream encryption, but not TLS-level). It turns
38875 out we were doing something much more akin to a 16-character
38876 polyalphabetic cipher. Oops.
38877 Thanks to Stefan Mark for finding the flaw!
38878 o Retire moria3 as a directory server, and add tor26 as a directory
38882 Changes in version 0.0.6 - 2004-05-02
38883 [version bump only]
38886 Changes in version 0.0.6rc4 - 2004-05-01
38887 o Update the built-in dirservers list to use the new directory format
38888 o Fix a rare seg fault: if a node offering a hidden service attempts
38889 to build a circuit to Alice's rendezvous point and fails before it
38890 reaches the last hop, it retries with a different circuit, but
38892 o Handle windows socket errors correctly.
38895 Changes in version 0.0.6rc3 - 2004-04-28
38896 o Don't expire non-general excess circuits (if we had enough
38897 circuits open, we were expiring rendezvous circuits -- even
38898 when they had a stream attached. oops.)
38899 o Fetch randomness from /dev/urandom better (not via fopen/fread)
38900 o Better debugging for tls errors
38901 o Some versions of openssl have an SSL_pending function that erroneously
38902 returns bytes when there is a non-application record pending.
38903 o Set Content-Type on the directory and hidserv descriptor.
38904 o Remove IVs from cipher code, since AES-ctr has none.
38905 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
38906 o We were using an array of length zero in a few places.
38907 o win32's gethostbyname can't resolve an IP to an IP.
38908 o win32's close can't close a socket.
38911 Changes in version 0.0.6rc2 - 2004-04-26
38912 o Fix a bug where we were closing tls connections intermittently.
38913 It turns out openssl keeps its errors around -- so if an error
38914 happens, and you don't ask about it, and then another openssl
38915 operation happens and succeeds, and you ask if there was an error,
38916 it tells you about the first error. Fun fun.
38917 o Fix a bug that's been lurking since 27 may 03 (!)
38918 When passing back a destroy cell, we would use the wrong circ id.
38919 'Mostly harmless', but still worth fixing.
38920 o Since we don't support truncateds much, don't bother sending them;
38921 just close the circ.
38922 o check for <machine/limits.h> so we build on NetBSD again (I hope).
38923 o don't crash if a conn that sent a begin has suddenly lost its circuit
38924 (this was quite rare).
38927 Changes in version 0.0.6rc1 - 2004-04-25
38928 o We now rotate link (tls context) keys and onion keys.
38929 o CREATE cells now include oaep padding, so you can tell
38930 if you decrypted them correctly.
38931 o Add bandwidthburst to server descriptor.
38932 o Directories now say which dirserver signed them.
38933 o Use a tor_assert macro that logs failed assertions too.
38936 Changes in version 0.0.6pre5 - 2004-04-18
38937 o changes from 0.0.6pre4:
38938 - make tor build on broken freebsd 5.2 installs
38939 - fix a failed assert when you try an intro point, get a nack, and try
38940 a second one and it works.
38941 - when alice uses a port that the hidden service doesn't accept,
38942 it now sends back an end cell (denied by exit policy). otherwise
38943 alice would just have to wait to time out.
38944 - fix another rare bug: when we had tried all the intro
38945 points for a hidden service, we fetched the descriptor
38946 again, but we left our introcirc thinking it had already
38947 sent an intro, so it kept waiting for a response...
38948 - bugfix: when you sleep your hidden-service laptop, as soon
38949 as it wakes up it tries to upload a service descriptor, but
38950 socketpair fails for some reason (localhost not up yet?).
38951 now we simply give up on that upload, and we'll try again later.
38952 i'd still like to find the bug though.
38953 - if an intro circ waiting for an ack dies before getting one, then
38955 - we were reusing stale service descriptors and refetching usable
38959 Changes in version 0.0.6pre4 - 2004-04-14
38960 o changes from 0.0.6pre3:
38961 - when bob fails to connect to the rendezvous point, and his
38962 circ didn't fail because of the rendezvous point itself, then
38963 he retries a couple of times
38964 - we expire introduction and rendezvous circs more thoroughly
38965 (sometimes they were hanging around forever)
38966 - we expire unattached rendezvous streams that have been around
38967 too long (they were sticking around forever).
38968 - fix a measly fencepost error that was crashing everybody with
38972 Changes in version 0.0.6pre3 - 2004-04-14
38973 o changes from 0.0.6pre2:
38974 - make hup work again
38975 - fix some memory leaks for dirservers
38976 - allow more skew in rendezvous descriptor timestamps, to help
38977 handle people like blanu who don't know what time it is
38978 - normal circs are 3 hops, but some rend/intro circs are 4, if
38979 the initiator doesn't get to choose the last hop
38980 - send acks for introductions, so alice can know whether to try
38982 - bob publishes intro points more correctly
38983 o changes from 0.0.5:
38984 - fix an assert trigger that's been plaguing us since the days
38985 of 0.0.2prexx (thanks weasel!)
38986 - retry stream correctly when we fail to connect because of
38987 exit-policy-reject (should try another) or can't-resolve-address
38988 (also should try another, because dns on random internet servers
38990 - when we hup a dirserver and we've *removed* a server from the
38991 approved-routers list, now we remove that server from the
38992 in-memory directories too
38995 Changes in version 0.0.6pre2 - 2004-04-08
38996 o We fixed our base32 implementation. Now it works on all architectures.
38999 Changes in version 0.0.6pre1 - 2004-04-08
39001 - Hidden services and rendezvous points are implemented. Go to
39002 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
39003 hidden services. (This only works via a socks4a proxy such as
39004 Privoxy, and currently it's quite slow.)
39007 Changes in version 0.0.5 - 2004-03-30
39008 [version bump only]
39011 Changes in version 0.0.5rc3 - 2004-03-29
39012 o Install torrc as torrc.sample -- we no longer clobber your
39014 o Re-enable recommendedversion checking (we broke it in rc2, oops)
39015 o Add in a 'notice' log level for things the operator should hear
39016 but that aren't warnings
39019 Changes in version 0.0.5rc2 - 2004-03-29
39020 o Hold socks connection open until reply is flushed (if possible)
39021 o Make exit nodes resolve IPs to IPs immediately, rather than asking
39022 the dns farm to do it.
39023 o Fix c99 aliasing warnings in rephist.c
39024 o Don't include server descriptors that are older than 24 hours in the
39026 o Give socks 'reject' replies their whole 15s to attempt to flush,
39027 rather than seeing the 60s timeout and assuming the flush had failed.
39028 o Clean automake droppings from the cvs repository
39031 Changes in version 0.0.5rc1 - 2004-03-28
39032 o Fix mangled-state bug in directory fetching (was causing sigpipes).
39033 o Only build circuits after we've fetched the directory: clients were
39034 using only the directory servers before they'd fetched a directory.
39035 This also means longer startup time; so it goes.
39036 o Fix an assert trigger where an OP would fail to handshake, and we'd
39037 expect it to have a nickname.
39038 o Work around a tsocks bug: do a socks reject when AP connection dies
39039 early, else tsocks goes into an infinite loop.
39042 Changes in version 0.0.4 - 2004-03-26
39043 o When connecting to a dirserver or OR and the network is down,
39047 Changes in version 0.0.3 - 2004-03-26
39048 o Warn and fail if server chose a nickname with illegal characters
39049 o Port to Solaris and Sparc:
39050 - include missing header fcntl.h
39051 - have autoconf find -lsocket -lnsl automatically
39052 - deal with hardware word alignment
39053 - make uname() work (solaris has a different return convention)
39054 - switch from using signal() to sigaction()
39055 o Preliminary work on reputation system:
39056 - Keep statistics on success/fail of connect attempts; they're published
39057 by kill -USR1 currently.
39058 - Add a RunTesting option to try to learn link state by creating test
39059 circuits, even when SocksPort is off.
39060 - Remove unused open circuits when there are too many.
39063 Changes in version 0.0.2 - 2004-03-19
39064 - Include strlcpy and strlcat for safer string ops
39065 - define INADDR_NONE so we compile (but still not run) on solaris
39068 Changes in version 0.0.2pre27 - 2004-03-14
39070 - Allow internal tor networks (we were rejecting internal IPs,
39071 now we allow them if they're set explicitly).
39072 - And fix a few endian issues.
39075 Changes in version 0.0.2pre26 - 2004-03-14
39077 - If a stream times out after 15s without a connected cell, don't
39078 try that circuit again: try a new one.
39079 - Retry streams at most 4 times. Then give up.
39080 - When a dirserver gets a descriptor from an unknown router, it
39081 logs its fingerprint (so the dirserver operator can choose to
39082 accept it even without mail from the server operator).
39083 - Inform unapproved servers when we reject their descriptors.
39084 - Make tor build on Windows again. It works as a client, who knows
39086 - Clearer instructions in the torrc for how to set up a server.
39087 - Be more efficient about reading fd's when our global token bucket
39088 (used for rate limiting) becomes empty.
39090 - Stop asserting that computers always go forward in time. It's
39092 - When we sent a cell (e.g. destroy) and then marked an OR connection
39093 expired, we might close it before finishing a flush if the other
39094 side isn't reading right then.
39095 - Don't allow dirservers to start if they haven't defined
39096 RecommendedVersions
39097 - We were caching transient dns failures. Oops.
39098 - Prevent servers from publishing an internal IP as their address.
39099 - Address a strcat vulnerability in circuit.c
39102 Changes in version 0.0.2pre25 - 2004-03-04
39104 - Put the OR's IP in its router descriptor, not its fqdn. That way
39105 we'll stop being stalled by gethostbyname for nodes with flaky dns,
39108 - If the user typed in an address that didn't resolve, the server
39112 Changes in version 0.0.2pre24 - 2004-03-03
39114 - Fix an assertion failure in dns.c, where we were trying to dequeue
39115 a pending dns resolve even if it wasn't pending
39116 - Fix a spurious socks5 warning about still trying to write after the
39117 connection is finished.
39118 - Hold certain marked_for_close connections open until they're finished
39119 flushing, rather than losing bytes by closing them too early.
39120 - Correctly report the reason for ending a stream
39121 - Remove some duplicate calls to connection_mark_for_close
39122 - Put switch_id and start_daemon earlier in the boot sequence, so it
39123 will actually try to chdir() to options.DataDirectory
39124 - Make 'make test' exit(1) if a test fails; fix some unit tests
39125 - Make tor fail when you use a config option it doesn't know about,
39126 rather than warn and continue.
39127 - Make --version work
39128 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
39131 Changes in version 0.0.2pre23 - 2004-02-29
39133 - Print a statement when the first circ is finished, so the user
39134 knows it's working.
39135 - If a relay cell is unrecognized at the end of the circuit,
39136 send back a destroy. (So attacks to mutate cells are more
39138 - New config option 'excludenodes' to avoid certain nodes for circuits.
39139 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
39140 so you can collect coredumps there.
39142 - Fix a bug in tls flushing where sometimes data got wedged and
39143 didn't flush until more data got sent. Hopefully this bug was
39144 a big factor in the random delays we were seeing.
39145 - Make 'connected' cells include the resolved IP, so the client
39146 dns cache actually gets populated.
39147 - Disallow changing from ORPort=0 to ORPort>0 on hup.
39148 - When we time-out on a stream and detach from the circuit, send an
39149 end cell down it first.
39150 - Only warn about an unknown router (in exitnodes, entrynodes,
39151 excludenodes) after we've fetched a directory.
39154 Changes in version 0.0.2pre22 - 2004-02-26
39156 - Servers publish less revealing uname information in descriptors.
39157 - More memory tracking and assertions, to crash more usefully when
39159 - If the default torrc isn't there, just use some default defaults.
39160 Plus provide an internal dirservers file if they don't have one.
39161 - When the user tries to use Tor as an http proxy, give them an http
39162 501 failure explaining that we're a socks proxy.
39163 - Dump a new router.desc on hup, to help confused people who change
39164 their exit policies and then wonder why router.desc doesn't reflect
39166 - Clean up the generic tor.sh init script that we ship with.
39168 - If the exit stream is pending on the resolve, and a destroy arrives,
39169 then the stream wasn't getting removed from the pending list. I
39170 think this was the one causing recent server crashes.
39171 - Use a more robust poll on OSX 10.3, since their poll is flaky.
39172 - When it couldn't resolve any dirservers, it was useless from then on.
39173 Now it reloads the RouterFile (or default dirservers) if it has no
39175 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
39176 many users don't even *have* a /usr/local/sbin/.
39179 Changes in version 0.0.2pre21 - 2004-02-18
39181 - There's a ChangeLog file that actually reflects the changelog.
39182 - There's a 'torify' wrapper script, with an accompanying
39183 tor-tsocks.conf, that simplifies the process of using tsocks for
39184 tor. It even has a man page.
39185 - The tor binary gets installed to sbin rather than bin now.
39186 - Retry streams where the connected cell hasn't arrived in 15 seconds
39187 - Clean up exit policy handling -- get the default out of the torrc,
39188 so we can update it without forcing each server operator to fix
39190 - Allow imaps and pop3s in default exit policy
39192 - Prevent picking middleman nodes as the last node in the circuit
39195 Changes in version 0.0.2pre20 - 2004-01-30
39197 - We now have a deb package, and it's in debian unstable. Go to
39198 it, apt-getters. :)
39199 - I've split the TotalBandwidth option into BandwidthRate (how many
39200 bytes per second you want to allow, long-term) and
39201 BandwidthBurst (how many bytes you will allow at once before the cap
39202 kicks in). This better token bucket approach lets you, say, set
39203 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
39204 performance while not exceeding your monthly bandwidth quota.
39205 - Push out a tls record's worth of data once you've got it, rather
39206 than waiting until you've read everything waiting to be read. This
39207 may improve performance by pipelining better. We'll see.
39208 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
39209 from failed circuits (if they haven't been connected yet) and attach
39211 - Expire old streams that haven't managed to connect. Some day we'll
39212 have them reattach to new circuits instead.
39215 - Fix several memory leaks that were causing servers to become bloated
39217 - Fix a few very rare assert triggers. A few more remain.
39218 - Setuid to User _before_ complaining about running as root.
39221 Changes in version 0.0.2pre19 - 2004-01-07
39223 - Fix deadlock condition in dns farm. We were telling a child to die by
39224 closing the parent's file descriptor to him. But newer children were
39225 inheriting the open file descriptor from the parent, and since they
39226 weren't closing it, the socket never closed, so the child never read
39227 eof, so he never knew to exit. Similarly, dns workers were holding
39228 open other sockets, leading to all sorts of chaos.
39229 - New cleaner daemon() code for forking and backgrounding.
39230 - If you log to a file, it now prints an entry at the top of the
39231 logfile so you know it's working.
39232 - The onionskin challenge length was 30 bytes longer than necessary.
39233 - Started to patch up the spec so it's not quite so out of date.
39236 Changes in version 0.0.2pre18 - 2004-01-02
39238 - Fix endian issues with the 'integrity' field in the relay header.
39239 - Fix a potential bug where connections in state
39240 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
39243 Changes in version 0.0.2pre17 - 2003-12-30
39245 - Made --debuglogfile (or any second log file, actually) work.
39246 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
39247 adversary could force us into an infinite loop.
39250 - Each onionskin handshake now includes a hash of the computed key,
39251 to prove the server's identity and help perfect forward secrecy.
39252 - Changed cell size from 256 to 512 bytes (working toward compatibility
39254 - Changed cell length to 2 bytes, and moved it to the relay header.
39255 - Implemented end-to-end integrity checking for the payloads of
39257 - Separated streamid from 'recognized' (otherwise circuits will get
39258 messed up when we try to have streams exit from the middle). We
39259 use the integrity-checking to confirm that a cell is addressed to
39261 - Randomize the initial circid and streamid values, so an adversary who
39262 breaks into a node can't learn how many circuits or streams have
39266 Changes in version 0.0.2pre16 - 2003-12-14
39268 - Fixed a bug that made HUP trigger an assert
39269 - Fixed a bug where a circuit that immediately failed wasn't being
39270 counted as a failed circuit in counting retries.
39273 - Now we close the circuit when we get a truncated cell: otherwise we're
39274 open to an anonymity attack where a bad node in the path truncates
39275 the circuit and then we open streams at him.
39276 - Add port ranges to exit policies
39277 - Add a conservative default exit policy
39278 - Warn if you're running tor as root
39279 - on HUP, retry OR connections and close/rebind listeners
39280 - options.EntryNodes: try these nodes first when picking the first node
39281 - options.ExitNodes: if your best choices happen to include any of
39282 your preferred exit nodes, you choose among just those preferred
39284 - options.ExcludedNodes: nodes that are never picked in path building
39287 Changes in version 0.0.2pre15 - 2003-12-03
39288 o Robustness and bugfixes:
39289 - Sometimes clients would cache incorrect DNS resolves, which would
39290 really screw things up.
39291 - An OP that goes offline would slowly leak all its sockets and stop
39293 - A wide variety of bugfixes in exit node selection, exit policy
39294 handling, and processing pending streams when a new circuit is
39296 - Pick nodes for a path only from those the directory says are up
39297 - Choose randomly from all running dirservers, not always the first one
39298 - Increase allowed http header size for directory fetch.
39299 - Stop writing to stderr (if we're daemonized it will be closed).
39300 - Enable -g always, so cores will be more useful to me.
39301 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
39304 - Wrote a man page. It lists commonly used options.
39307 - Change default loglevel to warn.
39308 - Make PidFile default to null rather than littering in your CWD.
39309 - OnionRouter config option is now obsolete. Instead it just checks
39311 - Moved to a single unified torrc file for both clients and servers.
39314 Changes in version 0.0.2pre14 - 2003-11-29
39315 o Robustness and bugfixes:
39316 - Force the admin to make the DataDirectory himself
39317 - to get ownership/permissions right
39318 - so clients no longer make a DataDirectory and then never use it
39319 - fix bug where a client who was offline for 45 minutes would never
39320 pull down a directory again
39321 - fix (or at least hide really well) the dns assert bug that was
39322 causing server crashes
39323 - warnings and improved robustness wrt clockskew for certs
39324 - use the native daemon(3) to daemonize, when available
39325 - exit if bind() fails
39326 - exit if neither socksport nor orport is defined
39327 - include our own tor_timegm (Win32 doesn't have its own)
39328 - bugfix for win32 with lots of connections
39329 - fix minor bias in PRNG
39330 - make dirserver more robust to corrupt cached directory
39333 - Wrote the design document (woo)
39335 o Circuit building and exit policies:
39336 - Circuits no longer try to use nodes that the directory has told them
39338 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
39339 bitcounts (18.0.0.0/8).
39340 - Make AP connections standby for a circuit if no suitable circuit
39341 exists, rather than failing
39342 - Circuits choose exit node based on addr/port, exit policies, and
39343 which AP connections are standing by
39344 - Bump min pathlen from 2 to 3
39345 - Relay end cells have a payload to describe why the stream ended.
39346 - If the stream failed because of exit policy, try again with a new
39348 - Clients have a dns cache to remember resolved addresses.
39349 - Notice more quickly when we have no working circuits
39352 - APPort is now called SocksPort
39353 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
39355 - RecommendedVersions is now a config variable rather than
39356 hardcoded (for dirservers)
39357 - Reloads config on HUP
39358 - Usage info on -h or --help
39359 - If you set User and Group config vars, it'll setu/gid to them.
39362 Changes in version 0.0.2pre13 - 2003-10-19
39363 o General stability:
39364 - SSL_write no longer fails when it returns WANTWRITE and the number
39365 of bytes in the buf has changed by the next SSL_write call.
39366 - Fix segfault fetching directory when network is down
39367 - Fix a variety of minor memory leaks
39368 - Dirservers reload the fingerprints file on HUP, so I don't have
39369 to take down the network when I approve a new router
39370 - Default server config file has explicit Address line to specify fqdn
39373 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
39374 - Make listener connections not ever alloc bufs
39376 o Autoconf improvements:
39377 - don't clobber an external CFLAGS in ./configure
39378 - Make install now works
39379 - create var/lib/tor on make install
39380 - autocreate a tor.sh initscript to help distribs
39381 - autocreate the torrc and sample-server-torrc with correct paths
39383 o Log files and Daemonizing now work:
39384 - If --DebugLogFile is specified, log to it at -l debug
39385 - If --LogFile is specified, use it instead of commandline
39386 - If --RunAsDaemon is set, tor forks and backgrounds on startup