1 Changes in version 0.4.7.4-alpha - 2022-02-25
2 This version contains the negotiation congestion control work which is the
3 final part needed before going stable. There are also various bugfixes
4 including two major ones detailed below. Last, the Exit notice page layout
5 has been modernized but the text is unchanged. We recommend that all relay
6 operators running any previous alpha upgrade to this one.
8 o Major features (relay, client, onion services):
9 - Implement RTT-based congestion control for exits and onion
10 services, from Proposal 324. Disabled by default. Enabled by the
11 'cc_alg' consensus parameter. Closes ticket 40444.
13 o Major bugfixes (client):
14 - Stop caching TCP connect failures to relays/bridges when we
15 initiated the connection as a client. Now we only cache connect
16 failures as a relay or bridge when we initiated them because of an
17 EXTEND request. Declining to re-attempt the client-based
18 connections could cause problems when we lose connectivity and try
19 to reconnect. Fixes bug 40499; bugfix on 0.3.3.4-alpha.
21 o Major bugfixes (relay, overload):
22 - Do not trigger a general overload on DNS timeout. Even after
23 fixing 40527, some code remained that triggered the overload.
24 Fixes bug 40564; bugfix on 0.4.7.1-alpha.
26 o Minor feature (authority, relay):
27 - Reject End-Of-Life relays running version 0.3.5.x. Closes
30 o Minor features (fallbackdir):
31 - Regenerate fallback directories generated on February 25, 2022.
33 o Minor features (geoip data):
34 - Update the geoip files to match the IPFire Location Database, as
35 retrieved on 2022/02/25.
37 o Minor bugfix (logging):
38 - Update a log notice dead URL to a working one. Fixes bug 40544;
39 bugfix on 0.3.5.1-alpha.
41 o Minor bugfix (relay):
42 - Remove the HSDir and HSIntro onion service v2 protocol versions so
43 relay stop advertising that they support them. Fixes bug 40509;
46 o Minor bugfixes (cell scheduling):
47 - Avoid writing empty payload with NSS write.
48 - Don't attempt to write 0 bytes after a cell scheduling loop. No
49 empty payload was put on the wire. Fixes bug 40548; bugfix
52 o Minor bugfixes (compilation):
53 - Resume being able to build on old / esoteric gcc versions. Fixes
54 bug 40550; bugfix on 0.4.7.1-alpha.
56 o Minor bugfixes (compiler warnings):
57 - Fix couple compiler warnings on latest Ubuntu Jammy. Fixes bug
58 40516; bugfix on 0.3.5.1-alpha.
61 - Provide an improved version of the tor-exit-notice.html file for
62 exit relays to use as a landing page. The text is unchanged, but
63 the page design and layout are significantly modernized, and
64 several links are fixed. Patch from "n_user"; closes ticket 40529.
67 Changes in version 0.4.6.10 - 2022-02-04
68 This version contains minor bugfixes but one in particular is that relays
69 don't advertise onion service v2 support at the protocol version level.
71 o Minor features (fallbackdir):
72 - Regenerate fallback directories generated on February 04, 2022.
74 o Minor features (geoip data):
75 - Update the geoip files to match the IPFire Location Database, as
76 retrieved on 2022/02/04.
78 o Minor bugfix (logging):
79 - Update a log notice dead URL to a working one. Fixes bug 40544;
80 bugfix on 0.3.5.1-alpha.
82 o Minor bugfix (relay):
83 - Remove the HSDir and HSIntro onion service v2 protocol versions so
84 relay stop advertising that they support them. Fixes bug 40509;
87 o Minor bugfixes (MetricsPort, Prometheus):
88 - Add double quotes to the label values of the onion service
89 metrics. Fixes bug 40552; bugfix on 0.4.5.1-alpha.
92 Changes in version 0.4.5.12 - 2022-02-04
93 This version contains mostly minor bugfixes for which you can find the
94 details below. The previous release (0.4.5.11) was suppose to update the
95 GeoIP and fallbackdir lists but a problem in our release pipeline prevented
96 those files to be updated correctly. Thus, this release regenerates up to
97 date lists. Furthermore, another fix to highlight is that relays don't
98 advertise onion service v2 support at the protocol version level.
100 o Minor feature (reproducible build):
101 - The repository can now build reproducible tarballs which adds the
102 build command "make dist-reprod" for that purpose. Closes
105 o Minor features (compilation):
106 - Give an error message if trying to build with a version of
107 LibreSSL known not to work with Tor. (There's an incompatibility
108 with LibreSSL versions 3.2.1 through 3.4.0 inclusive because of
109 their incompatibility with OpenSSL 1.1.1's TLSv1.3 APIs.) Closes
112 o Minor features (fallbackdir):
113 - Regenerate fallback directories generated on February 04, 2022.
115 o Minor features (geoip data):
116 - Update the geoip files to match the IPFire Location Database, as
117 retrieved on 2022/02/04.
119 o Minor bugfix (logging):
120 - Update a log notice dead URL to a working one. Fixes bug 40544;
121 bugfix on 0.3.5.1-alpha.
123 o Minor bugfix (relay):
124 - Remove the HSDir and HSIntro onion service v2 protocol versions so
125 relay stop advertising that they support them. Fixes bug 40509;
128 o Minor bugfixes (compilation):
129 - Fix a compilation error when trying to build Tor with a compiler
130 that does not support expanding statically initialized const
131 values in macro's. Fixes bug 40410; bugfix on 0.4.5.1-alpha
132 - Fix our configuration logic to detect whether we had OpenSSL 3:
133 previously, our logic was reversed. This has no other effect than
134 to change whether we suppress deprecated API warnings. Fixes bug
135 40429; bugfix on 0.3.5.13.
137 o Minor bugfixes (MetricsPort, Prometheus):
138 - Add double quotes to the label values of the onion service
139 metrics. Fixes bug 40552; bugfix on 0.4.5.1-alpha.
141 o Minor bugfixes (relay):
142 - Reject IPv6-only DirPorts. Our reachability self-test forces
143 DirPorts to be IPv4, but our configuration parser allowed them to
144 be IPv6-only, which led to an assertion failure. Fixes bug 40494;
145 bugfix on 0.4.5.1-alpha.
148 Changes in version 0.4.7.3-alpha - 2021-12-15
149 This third alpha release of the 0.4.7.x series fixes several bugs including
150 two major ones affecting Bridges and Relays (see below). If you are running
151 an earlier 0.4.7.x version, you should upgrade to this version.
153 o Major bugfixes (bridges):
154 - Make Tor work reliably again when you have multiple bridges
155 configured and one or more of them are unreachable. The problem
156 came because we require that we have bridge descriptors for both
157 of our first two bridges (else we refuse to try to connect), but
158 in some cases we would wait three hours before trying to fetch
159 these missing descriptors, and/or never recover when we do try to
160 fetch them. Fixes bugs 40396 and 40495; bugfix on 0.3.0.5-rc
163 o Major bugfixes (relay, overload):
164 - Change the MetricsPort DNS "timeout" label to be "tor_timeout" in
165 order to indicate that this was a DNS timeout from tor perspective
166 and not the DNS server itself.
167 - Deprecate overload_dns_timeout_period_secs and
168 overload_dns_timeout_scale_percent consensus parameters as well.
169 They were used to assess the overload state which is no more now.
170 - Don't make Tor DNS timeout trigger an overload general state.
171 These timeouts are different from DNS server timeout. They have to
172 be seen as timeout related to UX and not because of a network
173 problem. Fixes bug 40527; bugfix on 0.4.6.1-alpha.
175 o Minor feature (reproducible build):
176 - The repository can now build reproducible tarballs which adds the
177 build command "make dist-reprod" for that purpose. Closes
180 o Minor features (compilation):
181 - Give an error message if trying to build with a version of
182 LibreSSL known not to work with Tor. (There's an incompatibility
183 with LibreSSL versions 3.2.1 through 3.4.0 inclusive because of
184 their incompatibility with OpenSSL 1.1.1's TLSv1.3 APIs.) Closes
187 o Minor features (fallbackdir):
188 - Regenerate fallback directories generated on December 15, 2021.
190 o Minor features (geoip data):
191 - Update the geoip files to match the IPFire Location Database, as
192 retrieved on 2021/12/15.
194 o Minor features (portability):
195 - Try to prevent a compiler warning about printf arguments that
196 could sometimes occur on MSYS2 depending on the configuration.
199 o Minor bugfix (pluggable transport):
200 - Do not kill a managed proxy if one of its transport configurations
201 emits a method error. Instead log a warning and continue processing
202 method arguments. Fixes bug 7362; bugfix on 0.2.3.6-alpha.
204 o Minor bugfixes (bridges):
205 - When we don't yet have a descriptor for one of our bridges,
206 disable the entry guard retry schedule on that bridge. The entry
207 guard retry schedule and the bridge descriptor retry schedule can
208 conflict, e.g. where we mark a bridge as "maybe up" yet we don't
209 try to fetch its descriptor yet, leading Tor to wait (refusing to
210 do anything) until it becomes time to fetch the descriptor. Fixes
211 bug 40497; bugfix on 0.3.0.3-alpha.
213 o Minor bugfixes (compilation):
214 - Fix our configuration logic to detect whether we had OpenSSL 3:
215 previously, our logic was reversed. This has no other effect than
216 to change whether we suppress deprecated API warnings. Fixes bug
217 40429; bugfix on 0.3.5.13.
219 o Minor bugfixes (controller, path bias):
220 - When a circuit's path is specified, in full or in part, from the
221 controller API, do not count that circuit towards our path-bias
222 calculations. (Doing so was incorrect, since we cannot tell
223 whether the controller is selecting relays randomly.) Resolves a
224 "Bug" warning. Fixes bug 40515; bugfix on 0.2.4.10-alpha.
226 o Minor bugfixes (logging):
227 - When we no longer have enough directory information to use the
228 network, we would log a notice-level message -- but we would not
229 reliably log a message when we recovered and resumed using the
230 network. Now make sure there is always a corresponding message
231 about recovering. Fixes bug 40496; bugfix on 0.3.5.1-alpha.
233 o Minor bugfixes (performance, DoS):
234 - Fix one case of a not-especially viable denial-of-service attack
235 found by OSS-Fuzz in our consensus-diff parsing code. This attack
236 causes a lot small of memory allocations and then immediately
237 frees them: this is only slow when running with all the sanitizers
238 enabled. Fixes one case of bug 40472; bugfix on 0.3.1.1-alpha.
240 o Minor bugfixes (relay):
241 - Reject IPv6-only DirPorts. Our reachability self-test forces
242 DirPorts to be IPv4, but our configuration parser allowed them to
243 be IPv6-only, which led to an assertion failure. Fixes bug 40494;
244 bugfix on 0.4.5.1-alpha.
246 o Minor bugfixes (sandbox):
247 - Fix the sandbox on i386 by modifying it to allow the
248 "clock_gettime64" and "statx" system calls and to filter the
249 "chown32" and "stat64" system calls in place of "chown" and
250 "stat", respectively. Fixes bug 40505; bugfix on 0.2.5.4-alpha.
252 o Documentation (man, relay):
253 - Missing "OverloadStatistics" in tor.1 manpage. Fixes bug 40504;
254 bugfix on 0.4.6.1-alpha.
257 Changes in version 0.4.6.9 - 2021-12-15
258 This version fixes several bugs from earlier versions of Tor. One important
259 piece is the removal of DNS timeout metric from the overload general signal.
260 See below for more details.
262 o Major bugfixes (relay, overload):
263 - Don't make Tor DNS timeout trigger an overload general state.
264 These timeouts are different from DNS server timeout. They have to
265 be seen as timeout related to UX and not because of a network
266 problem. Fixes bug 40527; bugfix on 0.4.6.1-alpha.
268 o Minor feature (reproducible build):
269 - The repository can now build reproducible tarballs which adds the
270 build command "make dist-reprod" for that purpose. Closes
273 o Minor features (compilation):
274 - Give an error message if trying to build with a version of
275 LibreSSL known not to work with Tor. (There's an incompatibility
276 with LibreSSL versions 3.2.1 through 3.4.0 inclusive because of
277 their incompatibility with OpenSSL 1.1.1's TLSv1.3 APIs.) Closes
280 o Minor features (fallbackdir):
281 - Regenerate fallback directories generated on December 15, 2021.
283 o Minor features (geoip data):
284 - Update the geoip files to match the IPFire Location Database, as
285 retrieved on 2021/12/15.
287 o Minor bugfixes (compilation):
288 - Fix our configuration logic to detect whether we had OpenSSL 3:
289 previously, our logic was reversed. This has no other effect than
290 to change whether we suppress deprecated API warnings. Fixes bug
291 40429; bugfix on 0.3.5.13.
293 o Minor bugfixes (relay):
294 - Reject IPv6-only DirPorts. Our reachability self-test forces
295 DirPorts to be IPv4, but our configuration parser allowed them to
296 be IPv6-only, which led to an assertion failure. Fixes bug 40494;
297 bugfix on 0.4.5.1-alpha.
299 o Documentation (man, relay):
300 - Missing "OverloadStatistics" in tor.1 manpage. Fixes bug 40504;
301 bugfix on 0.4.6.1-alpha.
304 Changes in version 0.4.7.2-alpha - 2021-10-26
305 This second alpha release of the 0.4.7.x series adds two major
306 features: congestion control (prop324) for network performance, and
307 the MiddleOnly flag (prop335) voted by the authorities to pin relays
308 to the middle position for various network health reasons. This
309 release also fixes numerous bugs.
311 The congestion control feature, detailed in proposal 324, still needs
312 more work before we can enable it by default. It is currently in its
313 testing and tuning phase which means that you should expect more
314 0.4.7.x alphas as congestion control gets stabilized and tuned for
315 optimal performance. And so, at this release, it can not be used
316 without a custom patch.
318 o Major features (congestion control):
319 - Implement support for flow control over congestion controlled
320 circuits. This work comes from proposal 324. Closes ticket 40450.
322 o Major features (directory authority):
323 - Add a new consensus method to handle MiddleOnly specially. When
324 enough authorities are using this method, then any relay tagged
325 with the MiddleOnly flag will have its Exit, Guard, HSDir, and
326 V2Dir flags automatically cleared, and will have its BadExit flag
327 automatically set. Implements part of proposal 335.
328 - Authorities can now be configured to label relays as "MiddleOnly".
329 When voting for this flag, authorities automatically vote against
330 Exit, Guard, HSDir, and V2Dir; and in favor of BadExit. Implements
331 part of proposal 335. Based on a patch from Neel Chauhan.
333 o Major bugfix (relay, metrics):
334 - On the MetricsPort, the DNS error statistics are not reported by
335 record type ("record=...") anymore due to a libevent bug
336 (https://github.com/libevent/libevent/issues/1219). Fixes bug
337 40490; bugfix on 0.4.7.1-alpha.
339 o Major bugfixes (relay, overload state):
340 - Relays report the general overload state for DNS timeout errors
341 only if X% of all DNS queries over Y seconds are errors. Before
342 that, it only took 1 timeout to report the overload state which
343 was just too low of a threshold. The X and Y values are 1% and 10
344 minutes respectively but they are also controlled by consensus
345 parameters. Fixes bug 40491; bugfix on 0.4.6.1-alpha.
347 o Minor feature (authority, relay):
348 - Reject End-Of-Life relays running version 0.4.2.x, 0.4.3.x,
349 0.4.4.x and 0.4.5 alphas/rc. Closes ticket 40480.
351 o Minor feature (onion service v2):
352 - Onion service v2 addresses are now not recognized anymore by tor
353 meaning a bad hostname is returned when attempting to pass it on a
354 SOCKS connection. No more deprecation log is emitted client side.
356 - See https://blog.torproject.org/v2-deprecation-timeline for
357 details on how to transition from v2 to v3.
359 o Minor features (fallbackdir):
360 - Regenerate fallback directories for October 2021. Closes
363 o Minor features (logging, heartbeat):
364 - When a relay receives a cell that isn't encrypted properly for it,
365 but the relay is the last hop on the circuit, the relay now counts
366 how many cells of this kind it receives, on how many circuits, and
367 reports this information in the log. Previously, we'd log each
368 cell at PROTOCOL_WARN level, which is far too verbose to be
369 useful. Fixes part of ticket 40400.
371 o Minor features (testing):
372 - We now have separate fuzzers for the inner layers of v3 onion
373 service descriptors, to prevent future bugs like 40392. Closes
376 o Minor bugfixes (compilation):
377 - Fix compilation error when __NR_time is not defined. Fixes bug
378 40465; bugfix on 0.2.5.5-alpha. Patch by Daniel Pinto.
380 o Minor bugfixes (dirauth, bandwidth scanner):
381 - Add the AuthDirDontVoteOnDirAuthBandwidth dirauth config parameter
382 to avoid voting on bandwidth scanner weights to v3 directory
383 authorities. Fixes bug 40471; bugfix on 0.2.2.1-alpha. Patch by
386 o Minor bugfixes (fragile-hardening, sandbox):
387 - When building with --enable-fragile-hardening, add or relax Linux
388 seccomp rules to allow AddressSanitizer to execute normally if the
389 process terminates with the sandbox active. This has the side
390 effect of disabling the filtering of file- and directory-open
391 requests on most systems and dilutes the effectiveness of the
392 sandbox overall, as a wider range of system calls must be
393 permitted. Fixes bug 11477; bugfix on 0.2.5.4-alpha.
395 o Minor bugfixes (logging):
396 - If a channel has never received or transmitted a cell, or seen a
397 client, do not calculate time diffs against 1/1/1970 but log a
398 better prettier message. Fixes bug 40182; bugfix on 0.2.4.4.
400 o Minor bugfixes (onion service):
401 - Fix a warning BUG that would occur often on heavily loaded onion
402 service leading to filling the logs with useless warnings. Fixes
403 bug 34083; bugfix on 0.3.2.1-alpha.
405 o Minor bugfix (CI, onion service):
406 - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
407 bugfix on 0.3.2.1-alpha.
409 o Minor bugfixes (onion service, config):
410 - Fix a memory leak for a small config line string that could occur
411 if the onion service failed to be configured from file properly.
412 Fixes bug 40484; bugfix on 0.3.2.1-alpha.
414 o Minor bugfixes (onion service, TROVE-2021-008):
415 - Only log v2 access attempts once total, in order to not pollute
416 the logs with warnings and to avoid recording the times on disk
417 when v2 access was attempted. Note that the onion address was
418 _never_ logged. This counts as a Low-severity security issue.
419 Fixes bug 40474; bugfix on 0.4.5.8.
420 - Note that due to #40476 which removes v2 support entirely, this
421 log line is not emitted anymore. We still mention this in the
422 changelog because it is a Low-severity TROVE.
424 o Minor bugfixes (usability):
425 - Do not log "RENDEZVOUS1 cell with unrecognized rendezvous cookie"
426 at LOG_PROTOCOL_WARN; instead log it at DEBUG. This warning can
427 happen naturally if a client gives up on a rendezvous circuit
428 after sending INTRODUCE1. Fixes part of bug 40400; bugfix
430 - Do not log "circuit_receive_relay_cell failed" at
431 LOG_PROTOCOL_WARN; instead log it at DEBUG. In every case where we
432 would want to log this as a protocol warning, we are already
433 logging another warning from inside circuit_receive_relay_cell.
434 Fixes part of bug 40400; bugfix on 0.1.1.9-alpha.
436 o Code simplification and refactoring:
437 - Lower the official maximum for "guard-extreme-restriction-percent"
438 to 100. This has no effect on when the guard code will generate a
439 warning, but it makes the intent of the option clearer. Fixes bug
440 40486; bugfix on 0.3.0.1-alpha.
443 - Add unit tests for the Linux seccomp sandbox. Resolves
446 o Code simplification and refactoring (rust):
447 - Remove Rust support and its associated code. It is unsupported and
448 Rust focus should be shifted to arti. Closes ticket 40469.
450 o Testing (CI, chutney):
451 - Bump the data size that chutney transmits to 5MBytes in order to
452 trigger the flow control and congestion window code. Closes
456 Changes in version 0.4.6.8 - 2021-10-26
457 This version fixes several bugs from earlier versions of Tor. One
458 highlight is a fix on how we track DNS timeouts to report general
461 o Major bugfixes (relay, overload state):
462 - Relays report the general overload state for DNS timeout errors
463 only if X% of all DNS queries over Y seconds are errors. Before
464 that, it only took 1 timeout to report the overload state which
465 was just too low of a threshold. The X and Y values are 1% and 10
466 minutes respectively but they are also controlled by consensus
467 parameters. Fixes bug 40491; bugfix on 0.4.6.1-alpha.
469 o Minor features (fallbackdir):
470 - Regenerate fallback directories for October 2021. Closes
473 o Minor features (testing):
474 - On a testing network, relays can now use the
475 TestingMinTimeToReportBandwidth option to change the smallest
476 amount of time over which they're willing to report their observed
477 maximum bandwidth. Previously, this was fixed at 1 day. For
478 safety, values under 2 hours are only supported on testing
479 networks. Part of a fix for ticket 40337.
480 - Relays on testing networks no longer rate-limit how frequently
481 they are willing to report new bandwidth measurements. Part of a
482 fix for ticket 40337.
483 - Relays on testing networks now report their observed bandwidths
484 immediately from startup. Previously, they waited until they had
485 been running for a full day. Closes ticket 40337.
487 o Minor bugfix (onion service):
488 - Do not flag an HSDir as non-running in case the descriptor upload
489 or fetch fails. An onion service closes pending directory
490 connections before uploading a new descriptor which can thus lead
491 to wrongly flagging many relays and thus affecting circuit building
492 path selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
493 - Improve logging when a bad HS version is given. Fixes bug 40476;
494 bugfix on 0.4.6.1-alpha.
496 o Minor bugfix (CI, onion service):
497 - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
498 bugfix on 0.3.2.1-alpha.
500 o Minor bugfixes (compatibility):
501 - Fix compatibility with the most recent Libevent versions, which no
502 longer have an evdns_set_random_bytes() function. Because this
503 function has been a no-op since Libevent 2.0.4-alpha, it is safe
504 for us to just stop calling it. Fixes bug 40371; bugfix
507 o Minor bugfixes (onion service, TROVE-2021-008):
508 - Only log v2 access attempts once total, in order to not pollute
509 the logs with warnings and to avoid recording the times on disk
510 when v2 access was attempted. Note that the onion address was
511 _never_ logged. This counts as a Low-severity security issue.
512 Fixes bug 40474; bugfix on 0.4.5.8.
515 Changes in version 0.4.5.11 - 2021-10-26
516 The major change in this version is that v2 onion services are now
517 disabled at the client, service, and relay: any Tor nodes running this
518 version and onward will stop supporting v2 onion services. This is the
519 last step in the long deprecation process of v2 onion services.
520 Everyone running an earlier version, whether as a client, a relay, or
521 an onion service, should upgrade to Tor 0.3.5.17, 0.4.5.11,
524 o Major feature (onion service v2):
525 - See https://blog.torproject.org/v2-deprecation-timeline for
526 details on how to transition from v2 to v3.
527 - The control port commands HSFETCH and HSPOST no longer allow
528 version 2, and it is no longer possible to create a v2 service
530 - Tor no longer allows creating v2 services, or connecting as a
531 client to a v2 service. Relays will decline to be a v2 HSDir or
532 introduction point. This effectively disables onion service
533 version 2 Tor-wide. Closes ticket 40476.
535 o Minor features (bridge, backport from 0.4.6.8):
536 - We now announce the URL to Tor's new bridge status at
537 https://bridges.torproject.org/ when Tor is configured to run as a
538 bridge relay. Closes ticket 30477.
540 o Minor features (fallbackdir):
541 - Regenerate fallback directories for October 2021. Closes
544 o Minor features (logging, diagnostic, backport from 0.4.6.5):
545 - Log decompression failures at a higher severity level, since they
546 can help provide missing context for other warning messages. We
547 rate-limit these messages, to avoid flooding the logs if they
548 begin to occur frequently. Closes ticket 40175.
550 o Minor features (testing, backport from 0.4.6.8):
551 - On a testing network, relays can now use the
552 TestingMinTimeToReportBandwidth option to change the smallest
553 amount of time over which they're willing to report their observed
554 maximum bandwidth. Previously, this was fixed at 1 day. For
555 safety, values under 2 hours are only supported on testing
556 networks. Part of a fix for ticket 40337.
557 - Relays on testing networks no longer rate-limit how frequently
558 they are willing to report new bandwidth measurements. Part of a
559 fix for ticket 40337.
560 - Relays on testing networks now report their observed bandwidths
561 immediately from startup. Previously, they waited until they had
562 been running for a full day. Closes ticket 40337.
564 o Minor bugfix (CI, onion service):
565 - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
566 bugfix on 0.3.2.1-alpha.
568 o Minor bugfix (onion service, backport from 0.4.6.8):
569 - Do not flag an HSDir as non-running in case the descriptor upload
570 or fetch fails. An onion service closes pending directory
571 connections before uploading a new descriptor which can thus lead
572 to wrongly flagging many relays and thus affecting circuit building
573 path selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
575 o Minor bugfixes (compatibility, backport from 0.4.6.8):
576 - Fix compatibility with the most recent Libevent versions, which no
577 longer have an evdns_set_random_bytes() function. Because this
578 function has been a no-op since Libevent 2.0.4-alpha, it is safe
579 for us to just stop calling it. Fixes bug 40371; bugfix
582 o Minor bugfixes (consensus handling, backport from 0.4.6.4-rc):
583 - Avoid a set of bugs that could be caused by inconsistently
584 preferring an out-of-date consensus stored in a stale directory
585 cache over a more recent one stored on disk as the latest
586 consensus. Fixes bug 40375; bugfix on 0.3.1.1-alpha.
588 o Minor bugfixes (onion service, TROVE-2021-008, backport from 0.4.6.8):
589 - Only log v2 access attempts once total, in order to not pollute
590 the logs with warnings and to avoid recording the times on disk
591 when v2 access was attempted. Note that the onion address was
592 _never_ logged. This counts as a Low-severity security issue.
593 Fixes bug 40474; bugfix on 0.4.5.8.
596 Changes in version 0.3.5.17 - 2021-10-26
597 The major change in this version is that v2 onion services are now
598 disabled at the client, service, and relay: any Tor nodes running this
599 version and onward will stop supporting v2 onion services. This is the
600 last step in the long deprecation process of v2 onion services.
601 Everyone running an earlier version, whether as a client, a relay, or
602 an onion service, should upgrade to Tor 0.3.5.17, 0.4.5.11,
605 o Major feature (onion service v2, backport from 0.4.5.11):
606 - See https://blog.torproject.org/v2-deprecation-timeline for
607 details on how to transition from v2 to v3.
608 - The control port commands HSFETCH and HSPOST no longer allow
609 version 2, and it is no longer possible to create a v2 service
611 - Tor no longer allows creating v2 services, or connecting as a
612 client to a v2 service. Relays will decline to be a v2 HSDir or
613 introduction point. This effectively disables onion service
614 version 2 Tor-wide. Closes ticket 40476.
616 o Minor features (bridge, backport from 0.4.6.8):
617 - We now announce the URL to Tor's new bridge status at
618 https://bridges.torproject.org/ when Tor is configured to run as a
619 bridge relay. Closes ticket 30477.
621 o Minor features (fallbackdir):
622 - Regenerate fallback directories for October 2021. Closes
625 o Minor bugfixes (compatibility, backport from 0.4.6.8):
626 - Fix compatibility with the most recent Libevent versions, which no
627 longer have an evdns_set_random_bytes() function. Because this
628 function has been a no-op since Libevent 2.0.4-alpha, it is safe
629 for us to just stop calling it. Fixes bug 40371; bugfix
633 Changes in version 0.4.7.1-alpha - 2021-09-17
634 This version is the first alpha release of the 0.4.7.x series. One
635 major feature is Vanguards Lite, from proposal 333, to help mitigate
636 guard discovery attacks against onion services. It also includes
639 o Major features (Proposal 332, onion services, guard selection algorithm):
640 - Clients and onion services now choose four long-lived "layer 2"
641 guard relays for use as the middle hop in all onion circuits.
642 These relays are kept in place for a randomized duration averaging
643 1 week. This mitigates guard discovery attacks against clients and
644 short-lived onion services such as OnionShare. Long-lived onion
645 services that need high security should still use the Vanguards
646 addon (https://github.com/mikeperry-tor/vanguards). Closes ticket
647 40363; implements proposal 333.
649 o Minor features (bridge testing support):
650 - Let external bridge reachability testing tools discard cached
651 bridge descriptors when setting new bridges, so they can be sure
652 to get a clean reachability test. Implements ticket 40209.
654 o Minor features (fuzzing):
655 - When building with --enable-libfuzzer, use a set of compiler flags
656 that works with more recent versions of the library. Previously we
657 were using a set of flags from 2017. Closes ticket 40407.
659 o Minor features (testing configuration):
660 - When TestingTorNetwork is enabled, skip the permissions check on
661 hidden service directories. Closes ticket 40338.
662 - On a testing network, relays can now use the
663 TestingMinTimeToReportBandwidth option to change the smallest
664 amount of time over which they're willing to report their observed
665 maximum bandwidth. Previously, this was fixed at 1 day. For
666 safety, values under 2 hours are only supported on testing
667 networks. Part of a fix for ticket 40337.
668 - Relays on testing networks no longer rate-limit how frequently
669 they are willing to report new bandwidth measurements. Part of a
670 fix for ticket 40337.
671 - Relays on testing networks now report their observed bandwidths
672 immediately from startup. Previously, they waited until they had
673 been running for a full day. Closes ticket 40337.
675 o Minor bugfixes (circuit padding):
676 - Don't send STOP circuit padding cells when the other side has
677 already shut down the corresponding padding machine. Fixes bug
678 40435; bugfix on 0.4.0.1-alpha.
680 o Minor bugfixes (compatibility):
681 - Fix compatibility with the most recent Libevent versions, which no
682 longer have an evdns_set_random_bytes() function. Because this
683 function has been a no-op since Libevent 2.0.4-alpha, it is safe
684 for us to just stop calling it. Fixes bug 40371; bugfix
687 o Minor bugfixes (control, sandbox):
688 - Allows the control command SAVECONF to succeed when the seccomp
689 sandbox is enabled. Makes SAVECONF keep only one backup file, to
690 simplify implementation. Fixes bug 40317; bugfix on 0.2.5.4-alpha.
691 Patch by Daniel Pinto.
693 o Minor bugfixes (heartbeat):
694 - Adjust the heartbeat log message about distinct clients to
695 consider the HeartbeatPeriod rather than a flat 6-hour delay.
696 Fixes bug 40330; bugfix on 0.2.6.3-alpha.
698 o Minor bugfixes (logging, relay):
699 - Add spaces between the "and" when logging the "Your server has not
700 managed to confirm reachability for its" on dual-stack relays.
701 Fixes bug 40453; bugfix on 0.4.5.1-alpha. Patch by Neel Chauhan.
703 o Minor bugfixes (onion service):
704 - Do not flag an HSDir as non-running in case the descriptor upload
705 or fetch fails. An onion service closes pending directory
706 connections before uploading a new descriptor which leads to
707 wrongly flagging many relays and thus affecting circuit path
708 selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
710 o Minor bugfixes (statistics):
711 - Fix a fencepost issue when we check stability_last_downrated where
712 we called rep_hist_downrate_old_runs() twice. Fixes bug 40394;
713 bugfix on 0.2.0.5-alpha. Patch by Neel Chauhan.
715 o Minor bugfixes (tests):
716 - Fix a bug that prevented some tests from running with the correct
717 names. Fixes bug 40365; bugfix on 0.4.3.1-alpha.
720 - Add links to original tor design paper and anonbib to
721 docs/HACKING/README.1st.md. Closes ticket 33742. Patch from
723 - Describe the "fingerprint-ed25519" file in the tor.1 man page.
724 Fixes bug 40467; bugfix on 0.4.3.1-alpha. Patch by Neel Chauhan.
727 Changes in version 0.4.6.7 - 2021-08-16
728 This version fixes several bugs from earlier versions of Tor,
729 including one that could lead to a denial-of-service attack. Everyone
730 running an earlier version, whether as a client, a relay, or an onion
731 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
733 o Major bugfixes (cryptography, security):
734 - Resolve an assertion failure caused by a behavior mismatch between
735 our batch-signature verification code and our single-signature
736 verification code. This assertion failure could be triggered
737 remotely, leading to a denial of service attack. We fix this issue
738 by disabling batch verification. Fixes bug 40078; bugfix on
739 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
740 CVE-2021-38385. Found by Henry de Valence.
742 o Minor feature (fallbackdir):
743 - Regenerate fallback directories list. Close ticket 40447.
745 o Minor features (geoip data):
746 - Update the geoip files to match the IPFire Location Database, as
747 retrieved on 2021/08/12.
749 o Minor bugfix (crypto):
750 - Disable the unused batch verification feature of ed25519-donna.
751 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
754 o Minor bugfixes (onion service):
755 - Send back the extended SOCKS error 0xF6 (Onion Service Invalid
756 Address) for a v2 onion address. Fixes bug 40421; bugfix
759 o Minor bugfixes (relay):
760 - Reduce the compression level for data streaming from HIGH to LOW
761 in order to reduce CPU load on the directory relays. Fixes bug
762 40301; bugfix on 0.3.5.1-alpha.
764 o Minor bugfixes (timekeeping):
765 - Calculate the time of day correctly on systems where the time_t
766 type includes leap seconds. (This is not the case on most
767 operating systems, but on those where it occurs, our tor_timegm
768 function did not correctly invert the system's gmtime function,
769 which could result in assertion failures when calculating voting
770 schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha.
773 Changes in version 0.4.5.10 - 2021-08-16
774 This version fixes several bugs from earlier versions of Tor,
775 including one that could lead to a denial-of-service attack. Everyone
776 running an earlier version, whether as a client, a relay, or an onion
777 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
779 o Major bugfixes (cryptography, security):
780 - Resolve an assertion failure caused by a behavior mismatch between
781 our batch-signature verification code and our single-signature
782 verification code. This assertion failure could be triggered
783 remotely, leading to a denial of service attack. We fix this issue
784 by disabling batch verification. Fixes bug 40078; bugfix on
785 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
786 CVE-2021-38385. Found by Henry de Valence.
788 o Minor feature (fallbackdir):
789 - Regenerate fallback directories list. Close ticket 40447.
791 o Minor features (geoip data):
792 - Update the geoip files to match the IPFire Location Database, as
793 retrieved on 2021/08/12.
795 o Minor features (testing):
796 - Enable the deterministic RNG for unit tests that covers the
797 address set bloomfilter-based API's. Fixes bug 40419; bugfix
800 o Minor bugfix (crypto, backport from 0.4.6.7):
801 - Disable the unused batch verification feature of ed25519-donna.
802 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
805 o Minor bugfixes (relay, backport from 0.4.6.7):
806 - Reduce the compression level for data streaming from HIGH to LOW.
807 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
809 o Minor bugfixes (timekeeping, backport from 0.4.6.7):
810 - Calculate the time of day correctly on systems where the time_t
811 type includes leap seconds. (This is not the case on most
812 operating systems, but on those where it occurs, our tor_timegm
813 function did not correctly invert the system's gmtime function,
814 which could result in assertion failures when calculating voting
815 schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha.
817 o Minor bugfixes (warnings, portability, backport from 0.4.6.6):
818 - Suppress a strict-prototype warning when building with some
819 versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.
822 Changes in version 0.3.5.16 - 2021-08-16
823 This version fixes several bugs from earlier versions of Tor,
824 including one that could lead to a denial-of-service attack. Everyone
825 running an earlier version, whether as a client, a relay, or an onion
826 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
828 o Major bugfixes (cryptography, security):
829 - Resolve an assertion failure caused by a behavior mismatch between
830 our batch-signature verification code and our single-signature
831 verification code. This assertion failure could be triggered
832 remotely, leading to a denial of service attack. We fix this issue
833 by disabling batch verification. Fixes bug 40078; bugfix on
834 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
835 CVE-2021-38385. Found by Henry de Valence.
837 o Minor feature (fallbackdir):
838 - Regenerate fallback directories list. Close ticket 40447.
840 o Minor features (geoip data):
841 - Update the geoip files to match the IPFire Location Database, as
842 retrieved on 2021/08/12.
844 o Minor bugfix (crypto, backport from 0.4.6.7):
845 - Disable the unused batch verification feature of ed25519-donna.
846 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
849 o Minor bugfixes (relay, backport from 0.4.6.7):
850 - Reduce the compression level for data streaming from HIGH to LOW.
851 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
854 Changes in version 0.4.6.6 - 2021-06-30
855 Tor 0.4.6.6 makes several small fixes on 0.4.6.5, including one that
856 allows Tor to build correctly on older versions of GCC. You should
857 upgrade to this version if you were having trouble building Tor
858 0.4.6.5; otherwise, there is probably no need.
860 o Minor bugfixes (compilation):
861 - Fix a compilation error when trying to build Tor with a compiler
862 that does not support const variables in static initializers.
863 Fixes bug 40410; bugfix on 0.4.6.5.
864 - Suppress a strict-prototype warning when building with some
865 versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.
867 o Minor bugfixes (testing):
868 - Enable the deterministic RNG for unit tests that covers the
869 address set bloomfilter-based API's. Fixes bug 40419; bugfix
873 Changes in version 0.4.5.9 - 2021-06-14
874 Tor 0.4.5.9 fixes several security issues, including a
875 denial-of-service attack against onion service clients, and another
876 denial-of-service attack against relays. Everybody should upgrade to
877 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
879 o Major bugfixes (security, backport from 0.4.6.5):
880 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
881 half-closed streams. Previously, clients failed to validate which
882 hop sent these cells: this would allow a relay on a circuit to end
883 a stream that wasn't actually built with it. Fixes bug 40389;
884 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
885 003 and CVE-2021-34548.
887 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
888 - Detect more failure conditions from the OpenSSL RNG code.
889 Previously, we would detect errors from a missing RNG
890 implementation, but not failures from the RNG code itself.
891 Fortunately, it appears those failures do not happen in practice
892 when Tor is using OpenSSL's default RNG implementation. Fixes bug
893 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
894 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
896 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
897 - Resist a hashtable-based CPU denial-of-service attack against
898 relays. Previously we used a naive unkeyed hash function to look
899 up circuits in a circuitmux object. An attacker could exploit this
900 to construct circuits with chosen circuit IDs, to create
901 collisions and make the hash table inefficient. Now we use a
902 SipHash construction here instead. Fixes bug 40391; bugfix on
903 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
904 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
905 - Fix an out-of-bounds memory access in v3 onion service descriptor
906 parsing. An attacker could exploit this bug by crafting an onion
907 service descriptor that would crash any client that tried to visit
908 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
909 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
910 Glazunov from Google's Project Zero.
912 o Minor features (compatibility, backport from 0.4.6.4-rc):
913 - Remove an assertion function related to TLS renegotiation. It was
914 used nowhere outside the unit tests, and it was breaking
915 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
918 o Minor features (geoip data):
919 - Update the geoip files to match the IPFire Location Database, as
920 retrieved on 2021/06/10.
922 o Minor bugfixes (control, sandbox, backport from 0.4.6.4-rc):
923 - Allow the control command SAVECONF to succeed when the seccomp
924 sandbox is enabled, and make SAVECONF keep only one backup file to
925 simplify implementation. Previously SAVECONF allowed a large
926 number of backup files, which made it incompatible with the
927 sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
930 o Minor bugfixes (metrics port, backport from 0.4.6.4-rc):
931 - Fix a bug that made tor try to re-bind() on an already open
932 MetricsPort every 60 seconds. Fixes bug 40370; bugfix
936 Changes in version 0.4.4.9 - 2021-06-14
937 Tor 0.4.4.9 fixes several security issues, including a
938 denial-of-service attack against onion service clients, and another
939 denial-of-service attack against relays. Everybody should upgrade to
940 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
942 Note that the scheduled end-of-life date for the Tor 0.4.4.x series is
943 June 15. This is therefore the last release in its series. Everybody
944 still running 0.4.4.x should plan to upgrade to 0.4.5.x or later.
946 o Major bugfixes (security, backport from 0.4.6.5):
947 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
948 half-closed streams. Previously, clients failed to validate which
949 hop sent these cells: this would allow a relay on a circuit to end
950 a stream that wasn't actually built with it. Fixes bug 40389;
951 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
952 003 and CVE-2021-34548.
954 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
955 - Detect more failure conditions from the OpenSSL RNG code.
956 Previously, we would detect errors from a missing RNG
957 implementation, but not failures from the RNG code itself.
958 Fortunately, it appears those failures do not happen in practice
959 when Tor is using OpenSSL's default RNG implementation. Fixes bug
960 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
961 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
963 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
964 - Resist a hashtable-based CPU denial-of-service attack against
965 relays. Previously we used a naive unkeyed hash function to look
966 up circuits in a circuitmux object. An attacker could exploit this
967 to construct circuits with chosen circuit IDs, to create
968 collisions and make the hash table inefficient. Now we use a
969 SipHash construction here instead. Fixes bug 40391; bugfix on
970 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
971 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
972 - Fix an out-of-bounds memory access in v3 onion service descriptor
973 parsing. An attacker could exploit this bug by crafting an onion
974 service descriptor that would crash any client that tried to visit
975 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
976 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
977 Glazunov from Google's Project Zero.
979 o Minor features (compatibility, backport from 0.4.6.4-rc):
980 - Remove an assertion function related to TLS renegotiation. It was
981 used nowhere outside the unit tests, and it was breaking
982 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
985 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
986 - Regenerate the list of fallback directories to contain a new set
987 of 200 relays. Closes ticket 40265.
989 o Minor features (geoip data):
990 - Update the geoip files to match the IPFire Location Database, as
991 retrieved on 2021/06/10.
993 o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
994 - Fix a non-fatal BUG() message due to a too-early free of a string,
995 when listing a client connection from the DoS defenses subsystem.
996 Fixes bug 40345; bugfix on 0.4.3.4-rc.
998 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
999 - Fix an indentation problem that led to a warning from GCC 11.1.1.
1000 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
1003 Changes in version 0.3.5.15 - 2021-06-14
1004 Tor 0.3.5.15 fixes several security issues, including a
1005 denial-of-service attack against onion service clients, and another
1006 denial-of-service attack against relays. Everybody should upgrade to
1007 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
1009 o Major bugfixes (security, backport from 0.4.6.5):
1010 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
1011 half-closed streams. Previously, clients failed to validate which
1012 hop sent these cells: this would allow a relay on a circuit to end
1013 a stream that wasn't actually built with it. Fixes bug 40389;
1014 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
1015 003 and CVE-2021-34548.
1017 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
1018 - Detect more failure conditions from the OpenSSL RNG code.
1019 Previously, we would detect errors from a missing RNG
1020 implementation, but not failures from the RNG code itself.
1021 Fortunately, it appears those failures do not happen in practice
1022 when Tor is using OpenSSL's default RNG implementation. Fixes bug
1023 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
1024 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
1026 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
1027 - Resist a hashtable-based CPU denial-of-service attack against
1028 relays. Previously we used a naive unkeyed hash function to look
1029 up circuits in a circuitmux object. An attacker could exploit this
1030 to construct circuits with chosen circuit IDs, to create
1031 collisions and make the hash table inefficient. Now we use a
1032 SipHash construction here instead. Fixes bug 40391; bugfix on
1033 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
1034 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
1035 - Fix an out-of-bounds memory access in v3 onion service descriptor
1036 parsing. An attacker could exploit this bug by crafting an onion
1037 service descriptor that would crash any client that tried to visit
1038 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
1039 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
1040 Glazunov from Google's Project Zero.
1042 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
1043 - Fix an indentation problem that led to a warning from GCC 11.1.1.
1044 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
1046 o Minor features (compatibility, backport from 0.4.6.4-rc):
1047 - Remove an assertion function related to TLS renegotiation. It was
1048 used nowhere outside the unit tests, and it was breaking
1049 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
1052 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
1053 - Regenerate the list of fallback directories to contain a new set
1054 of 200 relays. Closes ticket 40265.
1056 o Minor features (geoip data):
1057 - Update the geoip files to match the IPFire Location Database, as
1058 retrieved on 2021/06/10.
1061 Changes in version 0.4.6.5 - 2021-06-14
1062 Tor 0.4.6.5 is the first stable release in its series. The 0.4.6.x
1063 series includes numerous features and bugfixes, including a significant
1064 improvement to our circuit timeout algorithm that should improve
1065 observed client performance, and a way for relays to report when they are
1068 This release also includes security fixes for several security issues,
1069 including a denial-of-service attack against onion service clients,
1070 and another denial-of-service attack against relays. Everybody should
1071 upgrade to one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
1073 Below are the changes since 0.4.6.4-rc. For a complete list of changes
1074 since 0.4.5.8, see the ReleaseNotes file.
1076 o Major bugfixes (security):
1077 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
1078 half-closed streams. Previously, clients failed to validate which
1079 hop sent these cells: this would allow a relay on a circuit to end
1080 a stream that wasn't actually built with it. Fixes bug 40389;
1081 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
1082 003 and CVE-2021-34548.
1084 o Major bugfixes (security, defense-in-depth):
1085 - Detect more failure conditions from the OpenSSL RNG code.
1086 Previously, we would detect errors from a missing RNG
1087 implementation, but not failures from the RNG code itself.
1088 Fortunately, it appears those failures do not happen in practice
1089 when Tor is using OpenSSL's default RNG implementation. Fixes bug
1090 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
1091 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
1093 o Major bugfixes (security, denial of service):
1094 - Resist a hashtable-based CPU denial-of-service attack against
1095 relays. Previously we used a naive unkeyed hash function to look
1096 up circuits in a circuitmux object. An attacker could exploit this
1097 to construct circuits with chosen circuit IDs, to create
1098 collisions and make the hash table inefficient. Now we use a
1099 SipHash construction here instead. Fixes bug 40391; bugfix on
1100 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
1101 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
1102 - Fix an out-of-bounds memory access in v3 onion service descriptor
1103 parsing. An attacker could exploit this bug by crafting an onion
1104 service descriptor that would crash any client that tried to visit
1105 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
1106 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
1107 Glazunov from Google's Project Zero.
1109 o Minor features (geoip data):
1110 - Update the geoip files to match the IPFire Location Database, as
1111 retrieved on 2021/06/10.
1113 o Minor features (logging, diagnostic):
1114 - Log decompression failures at a higher severity level, since they
1115 can help provide missing context for other warning messages. We
1116 rate-limit these messages, to avoid flooding the logs if they
1117 begin to occur frequently. Closes ticket 40175.
1120 Changes in version 0.4.6.4-rc - 2021-05-28
1121 Tor 0.4.6.4-rc fixes a few bugs from previous releases. This, we hope,
1122 the final release candidate in its series: unless major new issues are
1123 found, the next release will be stable.
1125 o Minor features (compatibility):
1126 - Remove an assertion function related to TLS renegotiation. It was
1127 used nowhere outside the unit tests, and it was breaking
1128 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
1131 o Minor bugfixes (consensus handling):
1132 - Avoid a set of bugs that could be caused by inconsistently
1133 preferring an out-of-date consensus stored in a stale directory
1134 cache over a more recent one stored on disk as the latest
1135 consensus. Fixes bug 40375; bugfix on 0.3.1.1-alpha.
1137 o Minor bugfixes (control, sandbox):
1138 - Allow the control command SAVECONF to succeed when the seccomp
1139 sandbox is enabled, and make SAVECONF keep only one backup file to
1140 simplify implementation. Previously SAVECONF allowed a large
1141 number of backup files, which made it incompatible with the
1142 sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
1145 o Minor bugfixes (metrics port):
1146 - Fix a bug that made tor try to re-bind() on an already open
1147 MetricsPort every 60 seconds. Fixes bug 40370; bugfix
1151 - Remove unneeded code for parsing private keys in directory
1152 documents. This code was only used for client authentication in v2
1153 onion services, which are now unsupported. Closes ticket 40374.
1156 Changes in version 0.4.5.8 - 2021-05-10
1157 Tor 0.4.5.8 fixes several bugs in earlier version, backporting fixes
1158 from the 0.4.6.x series.
1160 o Minor features (compatibility, Linux seccomp sandbox, backport from 0.4.6.3-rc):
1161 - Add a workaround to enable the Linux sandbox to work correctly
1162 with Glibc 2.33. This version of Glibc has started using the
1163 fstatat() system call, which previously our sandbox did not allow.
1164 Closes ticket 40382; see the ticket for a discussion of trade-offs.
1166 o Minor features (compilation, backport from 0.4.6.3-rc):
1167 - Make the autoconf script build correctly with autoconf versions
1168 2.70 and later. Closes part of ticket 40335.
1170 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
1171 - Regenerate the list of fallback directories to contain a new set
1172 of 200 relays. Closes ticket 40265.
1174 o Minor features (geoip data):
1175 - Update the geoip files to match the IPFire Location Database, as
1176 retrieved on 2021/05/07.
1178 o Minor features (onion services):
1179 - Add warning message when connecting to now deprecated v2 onion
1180 services. As announced, Tor 0.4.5.x is the last series that will
1181 support v2 onions. Closes ticket 40373.
1183 o Minor bugfixes (bridge, pluggable transport, backport from 0.4.6.2-alpha):
1184 - Fix a regression that made it impossible start Tor using a bridge
1185 line with a transport name and no fingerprint. Fixes bug 40360;
1186 bugfix on 0.4.5.4-rc.
1188 o Minor bugfixes (build, cross-compilation, backport from 0.4.6.3-rc):
1189 - Allow a custom "ar" for cross-compilation. Our previous build
1190 script had used the $AR environment variable in most places, but
1191 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
1193 o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
1194 - Fix a non-fatal BUG() message due to a too-early free of a string,
1195 when listing a client connection from the DoS defenses subsystem.
1196 Fixes bug 40345; bugfix on 0.4.3.4-rc.
1198 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
1199 - Fix an indentation problem that led to a warning from GCC 11.1.1.
1200 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
1202 o Minor bugfixes (controller, backport from 0.4.6.1-alpha):
1203 - Fix a "BUG" warning that would appear when a controller chooses
1204 the first hop for a circuit, and that circuit completes. Fixes bug
1205 40285; bugfix on 0.3.2.1-alpha.
1207 o Minor bugfixes (onion service, client, memory leak, backport from 0.4.6.3-rc):
1208 - Fix a bug where an expired cached descriptor could get overwritten
1209 with a new one without freeing it, leading to a memory leak. Fixes
1210 bug 40356; bugfix on 0.3.5.1-alpha.
1212 o Minor bugfixes (testing, BSD, backport from 0.4.6.2-alpha):
1213 - Fix pattern-matching errors when patterns expand to invalid paths
1214 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
1218 Changes in version 0.4.6.3-rc - 2021-05-10
1219 Tor 0.4.6.3-rc is the first release candidate in its series. It fixes
1220 a few small bugs from previous versions, and adds a better error
1221 message when trying to use (no longer supported) v2 onion services.
1223 Though we anticipate that we'll be doing a bit more clean-up between
1224 now and the stable release, we expect that our remaining changes will
1225 be fairly simple. There will likely be at least one more release
1226 candidate before 0.4.6.x is stable.
1228 o Major bugfixes (onion service, control port):
1229 - Make the ADD_ONION command properly configure client authorization.
1230 Before this fix, the created onion failed to add the client(s).
1231 Fixes bug 40378; bugfix on 0.4.6.1-alpha.
1233 o Minor features (compatibility, Linux seccomp sandbox):
1234 - Add a workaround to enable the Linux sandbox to work correctly
1235 with Glibc 2.33. This version of Glibc has started using the
1236 fstatat() system call, which previously our sandbox did not allow.
1237 Closes ticket 40382; see the ticket for a discussion of trade-offs.
1239 o Minor features (compilation):
1240 - Make the autoconf script build correctly with autoconf versions
1241 2.70 and later. Closes part of ticket 40335.
1243 o Minor features (geoip data):
1244 - Update the geoip files to match the IPFire Location Database, as
1245 retrieved on 2021/05/07.
1247 o Minor features (onion services):
1248 - Add a warning message when trying to connect to (no longer
1249 supported) v2 onion services. Closes ticket 40373.
1251 o Minor bugfixes (build, cross-compilation):
1252 - Allow a custom "ar" for cross-compilation. Our previous build
1253 script had used the $AR environment variable in most places, but
1254 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
1256 o Minor bugfixes (compiler warnings):
1257 - Fix an indentation problem that led to a warning from GCC 11.1.1.
1258 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
1260 o Minor bugfixes (logging, relay):
1261 - Emit a warning if an Address is found to be internal and tor can't
1262 use it. Fixes bug 40290; bugfix on 0.4.5.1-alpha.
1264 o Minor bugfixes (onion service, client, memory leak):
1265 - Fix a bug where an expired cached descriptor could get overwritten
1266 with a new one without freeing it, leading to a memory leak. Fixes
1267 bug 40356; bugfix on 0.3.5.1-alpha.
1270 Changes in version 0.4.6.2-alpha - 2021-04-15
1271 Tor 0.4.6.2-alpha is the second alpha in its series. It fixes several
1272 small bugs in previous releases, and solves other issues that had
1273 enabled denial-of-service attacks and affected integration with
1276 o Minor features (client):
1277 - Clients now check whether their streams are attempting to re-enter
1278 the Tor network (i.e. to send Tor traffic over Tor), and close
1279 them preemptively if they think exit relays will refuse them for
1280 this reason. See ticket 2667 for details. Closes ticket 40271.
1282 o Minor features (command line):
1283 - Add long format name "--torrc-file" equivalent to the existing
1284 command-line option "-f". Closes ticket 40324. Patch by
1287 o Minor features (dormant mode):
1288 - Add a new 'DormantTimeoutEnabled' option to allow coarse-grained
1289 control over whether the client ever becomes dormant from
1290 inactivity. Most people won't need this. Closes ticket 40228.
1292 o Minor features (fallback directory list):
1293 - Regenerate the list of fallback directories to contain a new set
1294 of 200 relays. Closes ticket 40265.
1296 o Minor features (geoip data):
1297 - Update the geoip files to match the IPFire Location Database, as
1298 retrieved on 2021/04/13.
1300 o Minor features (logging):
1301 - Edit heartbeat log messages so that more of them begin with the
1302 string "Heartbeat: ". Closes ticket 40322; patch
1305 o Minor bugfixes (bridge, pluggable transport):
1306 - Fix a regression that made it impossible start Tor using a bridge
1307 line with a transport name and no fingerprint. Fixes bug 40360;
1308 bugfix on 0.4.5.4-rc.
1310 o Minor bugfixes (channel, DoS):
1311 - Fix a non-fatal BUG() message due to a too-early free of a string,
1312 when listing a client connection from the DoS defenses subsystem.
1313 Fixes bug 40345; bugfix on 0.4.3.4-rc.
1315 o Minor bugfixes (compilation):
1316 - Fix a compilation warning about unused functions when building
1317 with a libc that lacks the GLOB_ALTDIRFUNC constant. Fixes bug
1318 40354; bugfix on 0.4.5.1-alpha. Patch by Daniel Pinto.
1320 o Minor bugfixes (configuration):
1321 - Fix pattern-matching for directories on all platforms when using
1322 %include options in configuration files. This patch also fixes
1323 compilation on musl libc based systems. Fixes bug 40141; bugfix
1326 o Minor bugfixes (relay):
1327 - Move the "overload-general" line from extrainfo to the server
1328 descriptor. Fixes bug 40364; bugfix on 0.4.6.1-alpha.
1330 o Minor bugfixes (testing, BSD):
1331 - Fix pattern-matching errors when patterns expand to invalid paths
1332 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
1335 o Documentation (manual):
1336 - Move the ServerTransport* options to the "SERVER OPTIONS" section.
1338 - Indicate that the HiddenServiceStatistics option also applies to
1339 bridges. Closes ticket 40346.
1340 - Move the description of BridgeRecordUsageByCountry to the section
1341 "STATISTICS OPTIONS". Closes ticket 40323.
1344 Changes in version 0.4.6.1-alpha - 2021-03-18
1345 Tor 0.4.6.1-alpha is the first alpha release in the 0.4.6.x series. It
1346 improves client circuit performance, adds missing features, and
1347 improves some of our DoS handling and statistics reporting. It also
1348 includes numerous smaller bugfixes.
1350 Below are the changes since 0.4.5.7. (Note that this release DOES
1351 include the fixes for the security bugs already fixed in 0.4.5.7.)
1353 o Major features (control port, onion services):
1354 - Add controller support for creating version 3 onion services with
1355 client authorization. Previously, only v2 onion services could be
1356 created with client authorization. Closes ticket 40084. Patch by
1359 o Major features (directory authority):
1360 - When voting on a relay with a Sybil-like appearance, add the Sybil
1361 flag when clearing out the other flags. This lets a relay operator
1362 know why their relay hasn't been included in the consensus. Closes
1363 ticket 40255. Patch by Neel Chauhan.
1365 o Major features (metrics):
1366 - Relays now report how overloaded they are in their extrainfo
1367 documents. This information is controlled with the
1368 OverloadStatistics torrc option, and it will be used to improve
1369 decisions about the network's load balancing. Implements proposal
1370 328; closes ticket 40222.
1372 o Major features (relay, denial of service):
1373 - Add a new DoS subsystem feature to control the rate of client
1374 connections for relays. Closes ticket 40253.
1376 o Major features (statistics):
1377 - Relays now publish statistics about the number of v3 onion
1378 services and volume of v3 onion service traffic, in the same
1379 manner they already do for v2 onions. Closes ticket 23126.
1381 o Major bugfixes (circuit build timeout):
1382 - Improve the accuracy of our circuit build timeout calculation for
1383 60%, 70%, and 80% build rates for various guard choices. We now
1384 use a maximum likelihood estimator for Pareto parameters of the
1385 circuit build time distribution, instead of a "right-censored
1386 estimator". This causes clients to ignore circuits that never
1387 finish building in their timeout calculations. Previously, clients
1388 were counting such unfinished circuits as having the highest
1389 possible build time value, when in reality these circuits most
1390 likely just contain relays that are offline. We also now wait a
1391 bit longer to let circuits complete for measurement purposes,
1392 lower the minimum possible effective timeout from 1.5 seconds to
1393 10ms, and increase the resolution of the circuit build time
1394 histogram from 50ms bin widths to 10ms bin widths. Additionally,
1395 we alter our estimate Xm by taking the maximum of the top 10 most
1396 common build time values of the 10ms histogram, and compute Xm as
1397 the average of these. Fixes bug 40168; bugfix on 0.2.2.14-alpha.
1398 - Remove max_time calculation and associated warning from circuit
1399 build timeout 'alpha' parameter estimation, as this is no longer
1400 needed by our new estimator from 40168. Fixes bug 34088; bugfix
1403 o Major bugfixes (signing key):
1404 - In the tor-gencert utility, give an informative error message if
1405 the passphrase given in `--create-identity-key` is too short.
1406 Fixes bug 40189; bugfix on 0.2.0.1-alpha. Patch by Neel Chauhan.
1408 o Minor features (bridge):
1409 - We now announce the URL to Tor's new bridge status at
1410 https://bridges.torproject.org/ when Tor is configured to run as a
1411 bridge relay. Closes ticket 30477.
1413 o Minor features (build system):
1414 - New "make lsp" command to auto generate the compile_commands.json
1415 file used by the ccls server. The "bear" program is needed for
1416 this. Closes ticket 40227.
1418 o Minor features (command-line interface):
1419 - Add build informations to `tor --version` in order to ease
1420 reproducible builds. Closes ticket 32102.
1421 - When parsing command-line flags that take an optional argument,
1422 treat the argument as absent if it would start with a '-'
1423 character. Arguments in that form are not intelligible for any of
1424 our optional-argument flags. Closes ticket 40223.
1425 - Allow a relay operator to list the ed25519 keys on the command
1426 line by adding the `rsa` and `ed25519` arguments to the
1427 --list-fingerprint flag to show the respective RSA and ed25519
1428 relay fingerprint. Closes ticket 33632. Patch by Neel Chauhan.
1430 o Minor features (control port, stream handling):
1431 - Add the stream ID to the event line in the ADDRMAP control event.
1432 Closes ticket 40249. Patch by Neel Chauhan.
1434 o Minor features (dormant mode):
1435 - Add a new 'DormantTimeoutEnabled' option for coarse-grained
1436 control over whether the client can become dormant from
1437 inactivity. Most people won't need this. Closes ticket 40228.
1439 o Minor features (logging):
1440 - Change the DoS subsystem heartbeat line format to be more clear on
1441 what has been detected/rejected, and which option is disabled (if
1442 any). Closes ticket 40308.
1443 - In src/core/mainloop/mainloop.c and src/core/mainloop/connection.c,
1444 put brackets around IPv6 addresses in log messages. Closes ticket
1445 40232. Patch by Neel Chauhan.
1447 o Minor features (performance, windows):
1448 - Use SRWLocks to implement locking on Windows. Replaces the
1449 "critical section" locking implementation with the faster
1450 SRWLocks, available since Windows Vista. Closes ticket 17927.
1451 Patch by Daniel Pinto.
1453 o Minor features (protocol, proxy support, defense in depth):
1454 - Close HAProxy connections if they somehow manage to send us data
1455 before we start reading. Closes another case of ticket 40017.
1457 o Minor features (tests, portability):
1458 - Port the hs_build_address.py test script to work with recent
1459 versions of python. Closes ticket 40213. Patch from
1462 o Minor features (vote document):
1463 - Add a "stats" line to directory authority votes, to report various
1464 statistics that authorities compute about the relays. This will
1465 help us diagnose the network better. Closes ticket 40314.
1467 o Minor bugfixes (build):
1468 - The configure script now shows whether or not lzma and zstd have
1469 been used, not just if the enable flag was passed in. Fixes bug
1470 40236; bugfix on 0.4.3.1-alpha.
1472 o Minor bugfixes (compatibility):
1473 - Fix a failure in the test cases when running on the "hppa"
1474 architecture, along with a related test that might fail on other
1475 architectures in the future. Fixes bug 40274; bugfix
1478 o Minor bugfixes (controller):
1479 - Fix a "BUG" warning that would appear when a controller chooses
1480 the first hop for a circuit, and that circuit completes. Fixes bug
1481 40285; bugfix on 0.3.2.1-alpha.
1483 o Minor bugfixes (directory authorities, voting):
1484 - Add a new consensus method (31) to support any future changes that
1485 authorities decide to make to the value of bwweightscale or
1486 maxunmeasuredbw. Previously, there was a bug that prevented the
1487 authorities from parsing these consensus parameters correctly under
1488 most circumstances. Fixes bug 19011; bugfix on 0.2.2.10-alpha.
1490 o Minor bugfixes (ipv6):
1491 - Allow non-SOCKSPorts to disable IPv4, IPv6, and PreferIPv4. Some
1492 rare configurations might break, but in this case you can disable
1493 NoIPv4Traffic and NoIPv6Traffic as needed. Fixes bug 33607; bugfix
1494 on 0.4.1.1-alpha. Patch by Neel Chauhan.
1496 o Minor bugfixes (key generation):
1497 - Do not require a valid torrc when using the `--keygen` argument to
1498 generate a signing key. This allows us to generate keys on systems
1499 or users which may not run Tor. Fixes bug 40235; bugfix on
1500 0.2.7.2-alpha. Patch by Neel Chauhan.
1502 o Minor bugfixes (onion services, logging):
1503 - Downgrade the severity of a few rendezvous circuit-related
1504 warnings from warning to info. Fixes bug 40207; bugfix on
1505 0.3.2.1-alpha. Patch by Neel Chauhan.
1507 o Minor bugfixes (relay):
1508 - Reduce the compression level for data streaming from HIGH to LOW.
1509 This should reduce the CPU and memory burden for directory caches.
1510 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
1512 o Code simplification and refactoring:
1513 - Remove the orconn_ext_or_id_map structure and related functions.
1514 (Nothing outside of unit tests used them.) Closes ticket 33383.
1515 Patch by Neel Chauhan.
1518 - As of this release, Tor no longer supports the old v2 onion
1519 services. They were deprecated last July for security, and support
1520 will be removed entirely later this year. We strongly encourage
1521 everybody to migrate to v3 onion services. For more information,
1522 see https://blog.torproject.org/v2-deprecation-timeline . Closes
1523 ticket 40266. (NOTE: We accidentally released an earlier version
1524 of the 0.4.6.1-alpha changelog without this entry. Sorry for
1527 o Code simplification and refactoring (metrics, DoS):
1528 - Move the DoS subsystem into the subsys manager, including its
1529 configuration options. Closes ticket 40261.
1531 o Removed features (relay):
1532 - Because DirPorts are only used on authorities, relays no longer
1533 advertise them. Similarly, self-testing for DirPorts has been
1534 disabled, since an unreachable DirPort is no reason for a relay
1535 not to advertise itself. (Configuring a DirPort will still work,
1536 for now.) Closes ticket 40282.
1539 Changes in version 0.3.5.14 - 2021-03-16
1540 Tor 0.3.5.14 backports fixes for two important denial-of-service bugs
1541 in earlier versions of Tor.
1543 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
1544 who can send directory data to a Tor instance to force that Tor
1545 instance to consume huge amounts of CPU. This is easiest to exploit
1546 against authorities, since anybody can upload to them, but directory
1547 caches could also exploit this vulnerability against relays or clients
1548 when they download. The other vulnerability (TROVE-2021-002) only
1549 affects directory authorities, and would allow an attacker to remotely
1550 crash the authority with an assertion failure. Patches have already
1551 been provided to the authority operators, to help ensure
1554 We recommend that everybody upgrade to one of the releases that fixes
1555 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
1558 This release also updates our GeoIP data source, and fixes a
1559 compatibility issue.
1561 o Major bugfixes (security, denial of service, backport from 0.4.5.7):
1562 - Disable the dump_desc() function that we used to dump unparseable
1563 information to disk. It was called incorrectly in several places,
1564 in a way that could lead to excessive CPU usage. Fixes bug 40286;
1565 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
1566 001 and CVE-2021-28089.
1567 - Fix a bug in appending detached signatures to a pending consensus
1568 document that could be used to crash a directory authority. Fixes
1569 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
1572 o Minor features (geoip data, backport from 0.4.5.7):
1573 - We have switched geoip data sources. Previously we shipped IP-to-
1574 country mappings from Maxmind's GeoLite2, but in 2019 they changed
1575 their licensing terms, so we were unable to update them after that
1576 point. We now ship geoip files based on the IPFire Location
1577 Database instead. (See https://location.ipfire.org/ for more
1578 information). This release updates our geoip files to match the
1579 IPFire Location Database as retrieved on 2021/03/12. Closes
1582 o Removed features (mallinfo deprecated, backport from 0.4.5.7):
1583 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
1584 Closes ticket 40309.
1587 Changes in version 0.4.4.8 - 2021-03-16
1588 Tor 0.4.4.8 backports fixes for two important denial-of-service bugs
1589 in earlier versions of Tor.
1591 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
1592 who can send directory data to a Tor instance to force that Tor
1593 instance to consume huge amounts of CPU. This is easiest to exploit
1594 against authorities, since anybody can upload to them, but directory
1595 caches could also exploit this vulnerability against relays or clients
1596 when they download. The other vulnerability (TROVE-2021-002) only
1597 affects directory authorities, and would allow an attacker to remotely
1598 crash the authority with an assertion failure. Patches have already
1599 been provided to the authority operators, to help ensure
1602 We recommend that everybody upgrade to one of the releases that fixes
1603 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
1606 This release also updates our GeoIP data source, and fixes a
1607 compatibility issue.
1609 o Major bugfixes (security, denial of service, backport from 0.4.5.7):
1610 - Disable the dump_desc() function that we used to dump unparseable
1611 information to disk. It was called incorrectly in several places,
1612 in a way that could lead to excessive CPU usage. Fixes bug 40286;
1613 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
1614 001 and CVE-2021-28089.
1615 - Fix a bug in appending detached signatures to a pending consensus
1616 document that could be used to crash a directory authority. Fixes
1617 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
1620 o Minor features (geoip data, backport from 0.4.5.7):
1621 - We have switched geoip data sources. Previously we shipped IP-to-
1622 country mappings from Maxmind's GeoLite2, but in 2019 they changed
1623 their licensing terms, so we were unable to update them after that
1624 point. We now ship geoip files based on the IPFire Location
1625 Database instead. (See https://location.ipfire.org/ for more
1626 information). This release updates our geoip files to match the
1627 IPFire Location Database as retrieved on 2021/03/12. Closes
1630 o Removed features (mallinfo deprecated, backport from 0.4.5.7):
1631 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
1632 Closes ticket 40309.
1635 Changes in version 0.4.5.7 - 2021-03-16
1636 Tor 0.4.5.7 fixes two important denial-of-service bugs in earlier
1639 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
1640 who can send directory data to a Tor instance to force that Tor
1641 instance to consume huge amounts of CPU. This is easiest to exploit
1642 against authorities, since anybody can upload to them, but directory
1643 caches could also exploit this vulnerability against relays or clients
1644 when they download. The other vulnerability (TROVE-2021-002) only
1645 affects directory authorities, and would allow an attacker to remotely
1646 crash the authority with an assertion failure. Patches have already
1647 been provided to the authority operators, to help ensure
1650 We recommend that everybody upgrade to one of the releases that fixes
1651 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
1654 This release also updates our GeoIP data source, and fixes a few
1655 smaller bugs in earlier releases.
1657 o Major bugfixes (security, denial of service):
1658 - Disable the dump_desc() function that we used to dump unparseable
1659 information to disk. It was called incorrectly in several places,
1660 in a way that could lead to excessive CPU usage. Fixes bug 40286;
1661 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
1662 001 and CVE-2021-28089.
1663 - Fix a bug in appending detached signatures to a pending consensus
1664 document that could be used to crash a directory authority. Fixes
1665 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
1668 o Minor features (geoip data):
1669 - We have switched geoip data sources. Previously we shipped IP-to-
1670 country mappings from Maxmind's GeoLite2, but in 2019 they changed
1671 their licensing terms, so we were unable to update them after that
1672 point. We now ship geoip files based on the IPFire Location
1673 Database instead. (See https://location.ipfire.org/ for more
1674 information). This release updates our geoip files to match the
1675 IPFire Location Database as retrieved on 2021/03/12. Closes
1678 o Minor bugfixes (directory authority):
1679 - Now that exit relays don't allow exit connections to directory
1680 authority DirPorts (to prevent network reentry), disable
1681 authorities' reachability self test on the DirPort. Fixes bug
1682 40287; bugfix on 0.4.5.5-rc.
1684 o Minor bugfixes (documentation):
1685 - Fix a formatting error in the documentation for
1686 VirtualAddrNetworkIPv6. Fixes bug 40256; bugfix on 0.2.9.4-alpha.
1688 o Minor bugfixes (Linux, relay):
1689 - Fix a bug in determining total available system memory that would
1690 have been triggered if the format of Linux's /proc/meminfo file
1691 had ever changed to include "MemTotal:" in the middle of a line.
1692 Fixes bug 40315; bugfix on 0.2.5.4-alpha.
1694 o Minor bugfixes (metrics port):
1695 - Fix a BUG() warning on the MetricsPort for an internal missing
1696 handler. Fixes bug 40295; bugfix on 0.4.5.1-alpha.
1698 o Minor bugfixes (onion service):
1699 - Remove a harmless BUG() warning when reloading tor configured with
1700 onion services. Fixes bug 40334; bugfix on 0.4.5.1-alpha.
1702 o Minor bugfixes (portability):
1703 - Fix a non-portable usage of "==" with "test" in the configure
1704 script. Fixes bug 40298; bugfix on 0.4.5.1-alpha.
1706 o Minor bugfixes (relay):
1707 - Remove a spammy log notice falsely claiming that the IPv4/v6
1708 address was missing. Fixes bug 40300; bugfix on 0.4.5.1-alpha.
1709 - Do not query the address cache early in the boot process when
1710 deciding if a relay needs to fetch early directory information
1711 from an authority. This bug resulted in a relay falsely believing
1712 it didn't have an address and thus triggering an authority fetch
1713 at each boot. Related to our fix for 40300.
1715 o Removed features (mallinfo deprecated):
1716 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
1717 Closes ticket 40309.
1720 Changes in version 0.4.5.6 - 2021-02-15
1721 The Tor 0.4.5.x release series is dedicated to the memory of Karsten
1722 Loesing (1979-2020), Tor developer, cypherpunk, husband, and father.
1723 Karsten is best known for creating the Tor metrics portal and leading
1724 the metrics team, but he was involved in Tor from the early days. For
1725 example, while he was still a student he invented and implemented the
1726 v2 onion service directory design, and he also served as an ambassador
1727 to the many German researchers working in the anonymity field. We
1728 loved him and respected him for his patience, his consistency, and his
1729 welcoming approach to growing our community.
1731 This release series introduces significant improvements in relay IPv6
1732 address discovery, a new "MetricsPort" mechanism for relay operators
1733 to measure performance, LTTng support, build system improvements to
1734 help when using Tor as a static library, and significant bugfixes
1735 related to Windows relay performance. It also includes numerous
1736 smaller features and bugfixes.
1738 Below are the changes since 0.4.4.4-rc. For a complete list of changes
1739 since 0.4.4.7, see the ReleaseNotes file.
1741 o Major bugfixes (IPv6, relay):
1742 - Fix a bug that prevented a relay from publishing its descriptor if
1743 an auto-discovered IPv6 that was found unreachable. Fixes bug
1744 40279; bugfix on 0.4.5.1-alpha.
1746 o Minor features (protocol versions):
1747 - Stop claiming to support the "DirCache=1" subprotocol version.
1748 Technically, we stopped supporting this subprotocol back in
1749 0.4.5.1-alpha, but we needed to wait for the authorities to stop
1750 listing it as "required" before we could drop it from the list.
1751 Closes ticket 40221.
1753 o Minor bugfixes (logging):
1754 - Avoid a spurious log message about missing subprotocol versions,
1755 when the consensus that we're reading from is older than the
1756 current release. Previously we had made this message nonfatal, but
1757 in practice, it is never relevant when the consensus is older than
1758 the current release. Fixes bug 40281; bugfix on 0.4.0.1-alpha.
1760 o Minor bugfixes (metrics port):
1761 - Fix a bug warning when a metrics port socket was unexpectedly
1762 closed. Fixes bug 40257; bugfix on 0.4.5.1-alpha
1764 o Minor bugfixes (relay):
1765 - Allow relays to have a RFC1918 address if PublishServerDescriptor
1766 is set to 0 and AssumeReachable is set to 1. This is to support
1767 the use case of a bridge on a local network, exposed via a
1768 pluggable transport. Fixes bug 40208; bugfix on 0.4.5.1-alpha.
1770 o Minor bugfixes (relay, config):
1771 - Fix a problem in the removal of duplicate ORPorts from the
1772 internal port list when loading the config file. We were removing
1773 the wrong ports, breaking valid torrc uses cases for multiple
1774 ORPorts of the same address family. Fixes bug 40289; bugfix
1778 Changes in version 0.4.4.7 - 2021-02-03
1779 Tor 0.4.4.7 backports numerous bugfixes from later releases,
1780 including one that made v3 onion services more susceptible to
1781 denial-of-service attacks, and a feature that makes some kinds of
1782 DoS attacks harder to perform.
1784 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
1785 - Stop requiring a live consensus for v3 clients and services, and
1786 allow a "reasonably live" consensus instead. This allows v3 onion
1787 services to work even if the authorities fail to generate a
1788 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1791 o Major feature (exit, backport from 0.4.5.5-rc):
1792 - Re-entry into the network is now denied at the Exit level to all
1793 relays' ORPorts and authorities' ORPorts and DirPorts. This change
1794 should help mitgate a set of denial-of-service attacks. Closes
1797 o Minor feature (build system, backport from 0.4.5.4-rc):
1798 - New "make lsp" command to generate the compile_commands.json file
1799 used by the ccls language server. The "bear" program is needed for
1800 this. Closes ticket 40227.
1802 o Minor features (compilation, backport from 0.4.5.2-rc):
1803 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
1804 later. There are a number of APIs newly deprecated in OpenSSL
1805 3.0.0 that Tor still requires. (A later version of Tor will try to
1806 stop depending on these APIs.) Closes ticket 40165.
1808 o Minor features (crypto, backport from 0.4.5.3-rc):
1809 - Fix undefined behavior on our Keccak library. The bug only
1810 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
1811 and would result in wrong digests. Fixes bug 40210; bugfix on
1812 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
1813 weasel for diagnosing this.
1815 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
1816 - Strip '\r' characters when reading text files on Unix platforms.
1817 This should resolve an issue where a relay operator migrates a
1818 relay from Windows to Unix, but does not change the line ending of
1819 Tor's various state files to match the platform, and the CRLF line
1820 endings from Windows end up leaking into other files such as the
1821 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
1823 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
1824 - Fix a compilation warning about unreachable fallthrough
1825 annotations when building with "--enable-all-bugs-are-fatal" on
1826 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
1828 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
1829 - Handle partial SOCKS5 messages correctly. Previously, our code
1830 would send an incorrect error message if it got a SOCKS5 request
1831 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
1833 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
1834 - Fix the `config/parse_tcp_proxy_line` test so that it works
1835 correctly on systems where the DNS provider hijacks invalid
1836 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
1837 - Fix our Python reference-implementation for the v3 onion service
1838 handshake so that it works correctly with the version of hashlib
1839 provided by Python 3.9. Fixes part of bug 40179; bugfix
1841 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
1842 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
1845 Changes in version 0.4.3.8 - 2021-02-03
1846 Tor 0.4.3.8 backports numerous bugfixes from later releases,
1847 including one that made v3 onion services more susceptible to
1848 denial-of-service attacks, and a feature that makes some kinds of
1849 DoS attacks harder to perform.
1851 Note that this is, in all likelihood, the last release of Tor 0.4.3.x,
1852 which will reach end-of-life on 15 Feb 2021.
1854 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
1855 - Stop requiring a live consensus for v3 clients and services, and
1856 allow a "reasonably live" consensus instead. This allows v3 onion
1857 services to work even if the authorities fail to generate a
1858 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1861 o Major bugfixes (stats, onion services, backport from 0.4.4.5):
1862 - Fix a bug where we were undercounting the Tor network's total
1863 onion service traffic, by ignoring any traffic originating from
1864 clients. Now we count traffic from both clients and services.
1865 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
1867 o Major feature (exit, backport from 0.4.5.5-rc):
1868 - Re-entry into the network is now denied at the Exit level to all
1869 relays' ORPorts and authorities' ORPorts and DirPorts. This change
1870 should help mitgate a set of denial-of-service attacks. Closes
1873 o Minor feature (build system, backport from 0.4.5.4-rc):
1874 - New "make lsp" command to generate the compile_commands.json file
1875 used by the ccls language server. The "bear" program is needed for
1876 this. Closes ticket 40227.
1878 o Minor features (compilation, backport from 0.4.5.2-rc):
1879 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
1880 later. There are a number of APIs newly deprecated in OpenSSL
1881 3.0.0 that Tor still requires. (A later version of Tor will try to
1882 stop depending on these APIs.) Closes ticket 40165.
1884 o Minor features (crypto, backport from 0.4.5.3-rc):
1885 - Fix undefined behavior on our Keccak library. The bug only
1886 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
1887 and would result in wrong digests. Fixes bug 40210; bugfix on
1888 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
1889 weasel for diagnosing this.
1891 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
1892 - Strip '\r' characters when reading text files on Unix platforms.
1893 This should resolve an issue where a relay operator migrates a
1894 relay from Windows to Unix, but does not change the line ending of
1895 Tor's various state files to match the platform, and the CRLF line
1896 endings from Windows end up leaking into other files such as the
1897 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
1899 o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
1900 - Resolve a compilation warning that could occur in
1901 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
1903 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
1904 - Fix a compilation warning about unreachable fallthrough
1905 annotations when building with "--enable-all-bugs-are-fatal" on
1906 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
1908 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
1909 - Handle partial SOCKS5 messages correctly. Previously, our code
1910 would send an incorrect error message if it got a SOCKS5 request
1911 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
1913 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
1914 - Fix the `config/parse_tcp_proxy_line` test so that it works
1915 correctly on systems where the DNS provider hijacks invalid
1916 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
1917 - Fix our Python reference-implementation for the v3 onion service
1918 handshake so that it works correctly with the version of hashlib
1919 provided by Python 3.9. Fixes part of bug 40179; bugfix
1921 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
1922 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
1925 Changes in version 0.3.5.13 - 2020-02-03
1926 Tor 0.3.5.13 backports numerous bugfixes from later releases,
1927 including one that made v3 onion services more susceptible to
1928 denial-of-service attacks, and a feature that makes some kinds of
1929 DoS attacks harder to perform.
1931 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
1932 - Stop requiring a live consensus for v3 clients and services, and
1933 allow a "reasonably live" consensus instead. This allows v3 onion
1934 services to work even if the authorities fail to generate a
1935 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1938 o Major bugfixes (stats, onion services, backport from 0.4.4.5):
1939 - Fix a bug where we were undercounting the Tor network's total
1940 onion service traffic, by ignoring any traffic originating from
1941 clients. Now we count traffic from both clients and services.
1942 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
1944 o Major feature (exit, backport from 0.4.5.5-rc):
1945 - Re-entry into the network is now denied at the Exit level to all
1946 relays' ORPorts and authorities' ORPorts and DirPorts. This change
1947 should help mitigate a set of denial-of-service attacks. Closes
1950 o Minor feature (build system, backport from 0.4.5.4-rc):
1951 - New "make lsp" command to generate the compile_commands.json file
1952 used by the ccls language server. The "bear" program is needed for
1953 this. Closes ticket 40227.
1955 o Minor features (compilation, backport from 0.4.5.2-rc):
1956 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
1957 later. There are a number of APIs newly deprecated in OpenSSL
1958 3.0.0 that Tor still requires. (A later version of Tor will try to
1959 stop depending on these APIs.) Closes ticket 40165.
1961 o Minor features (crypto, backport from 0.4.5.3-rc):
1962 - Fix undefined behavior on our Keccak library. The bug only
1963 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
1964 and would result in wrong digests. Fixes bug 40210; bugfix on
1965 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
1966 weasel for diagnosing this.
1968 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
1969 - Strip '\r' characters when reading text files on Unix platforms.
1970 This should resolve an issue where a relay operator migrates a
1971 relay from Windows to Unix, but does not change the line ending of
1972 Tor's various state files to match the platform, and the CRLF line
1973 endings from Windows end up leaking into other files such as the
1974 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
1976 o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
1977 - Resolve a compilation warning that could occur in
1978 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
1980 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
1981 - Fix a compilation warning about unreachable fallthrough
1982 annotations when building with "--enable-all-bugs-are-fatal" on
1983 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
1985 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
1986 - Handle partial SOCKS5 messages correctly. Previously, our code
1987 would send an incorrect error message if it got a SOCKS5 request
1988 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
1990 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
1991 - Fix our Python reference-implementation for the v3 onion service
1992 handshake so that it works correctly with the version of hashlib
1993 provided by Python 3.9. Fixes part of bug 40179; bugfix
1995 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
1996 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
1999 Changes in version 0.4.5.5-rc - 2021-02-01
2000 Tor 0.4.5.5-rc is the third release candidate in its series. We're
2001 coming closer and closer to a stable release series. This release
2002 fixes an annoyance with address detection code, and somewhat mitigates
2003 an ongoing denial-of-service attack.
2005 We anticipate no more code changes between this and the stable
2006 release, though of course that could change.
2008 o Major feature (exit):
2009 - Re-entry into the network is now denied at the Exit level to all
2010 relays' ORPorts and authorities' ORPorts and DirPorts. This change
2011 should help mitgate a set of denial-of-service attacks. Closes
2014 o Minor bugfixes (relay, configuration):
2015 - Don't attempt to discover our address (IPv4 or IPv6) if no ORPort
2016 for it can be found in the configuration. Fixes bug 40254; bugfix
2020 Changes in version 0.4.5.4-rc - 2021-01-22
2021 Tor 0.4.5.4-rc is the second release candidate in its series. It fixes
2022 several bugs present in previous releases.
2024 We expect that the stable release will be the same, or almost the
2025 same, as this release candidate, unless serious bugs are found.
2027 o Major bugfixes (authority, IPv6):
2028 - Do not consider multiple relays in the same IPv6 /64 network to be
2029 sybils. Fixes bug 40243; bugfix on 0.4.5.1-alpha.
2031 o Major bugfixes (directory cache, performance, windows):
2032 - Limit the number of items in the consensus diff cache to 64 on
2033 Windows. We hope this will mitigate an issue where Windows relay
2034 operators reported Tor using 100% CPU, while we investigate better
2035 solutions. Fixes bug 24857; bugfix on 0.3.1.1-alpha.
2037 o Minor feature (build system):
2038 - New "make lsp" command to generate the compile_commands.json file
2039 used by the ccls language server. The "bear" program is needed for
2040 this. Closes ticket 40227.
2042 o Minor features (authority, logging):
2043 - Log more information for directory authority operators during the
2044 consensus voting process, and while processing relay descriptors.
2045 Closes ticket 40245.
2046 - Reject obsolete router/extrainfo descriptors earlier and more
2047 quietly, to avoid spamming the logs. Fixes bug 40238; bugfix
2050 o Minor bugfixes (compilation):
2051 - Fix another warning about unreachable fallthrough annotations when
2052 building with "--enable-all-bugs-are-fatal" on some compilers.
2053 Fixes bug 40241; bugfix on 0.4.5.3-rc.
2054 - Change the linker flag ordering in our library search code so that
2055 it works for compilers that need the libraries to be listed in the
2056 right order. Fixes bug 33624; bugfix on 0.1.1.0-alpha.
2058 o Minor bugfixes (config, bridge):
2059 - Don't initiate a connection to a bridge configured to use a
2060 missing transport. This change reverts an earlier fix that would
2061 try to avoid such situations during configuration chcecking, but
2062 which doesn't work with DisableNetwork. Fixes bug 40106; bugfix
2065 o Minor bugfixes (onion services):
2066 - Avoid a non-fatal assertion in certain edge-cases when
2067 establishing a circuit to an onion service. Fixes bug 32666;
2068 bugfix on 0.3.0.3-alpha.
2070 o Minor bugfixes (relay):
2071 - If we were unable to build our descriptor, don't mark it as having
2072 been advertised. Also remove an harmless BUG(). Fixes bug 40231;
2073 bugfix on 0.4.5.1-alpha.
2076 Changes in version 0.4.5.3-rc - 2021-01-12
2077 Tor 0.4.5.3-rc is the first release candidate in its series. It fixes
2078 several bugs, including one that broke onion services on certain older
2079 ARM CPUs, and another that made v3 onion services less reliable.
2081 Though we anticipate that we'll be doing a bit more clean-up between
2082 now and the stable release, we expect that our remaining changes will
2083 be fairly simple. There will be at least one more release candidate
2084 before 0.4.5.x is stable.
2086 o Major bugfixes (onion service v3):
2087 - Stop requiring a live consensus for v3 clients and services, and
2088 allow a "reasonably live" consensus instead. This allows v3 onion
2089 services to work even if the authorities fail to generate a
2090 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
2093 o Minor features (crypto):
2094 - Fix undefined behavior on our Keccak library. The bug only
2095 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
2096 and would result in wrong digests. Fixes bug 40210; bugfix on
2097 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
2098 weasel for diagnosing this.
2100 o Minor features (documentation):
2101 - Mention the "!badexit" directive that can appear in an authority's
2102 approved-routers file, and update the description of the
2103 "!invalid" directive. Closes ticket 40188.
2105 o Minor bugfixes (compilation):
2106 - Fix a compilation warning about unreachable fallthrough
2107 annotations when building with "--enable-all-bugs-are-fatal" on
2108 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
2109 - Fix the "--enable-static-tor" switch to properly set the "-static"
2110 compile option onto the tor binary only. Fixes bug 40111; bugfix
2113 o Minor bugfixes (config, bridge):
2114 - Really fix the case where torrc has a missing ClientTransportPlugin
2115 but is configured with a Bridge line and UseBridges. Previously,
2116 we didn't look at the managed proxy list and thus would fail for
2117 the "exec" case. Fixes bug 40106; bugfix on 0.4.5.1-alpha.
2119 o Minor bugfixes (logging, relay):
2120 - Log our address as reported by the directory authorities, if none
2121 was configured or detected before. Fixes bug 40201; bugfix
2123 - When a launching bandwidth testing circuit, don't incorrectly call
2124 it a reachability test, or trigger a "CHECKING_REACHABILITY"
2125 control event. Fixes bug 40205; bugfix on 0.4.5.1-alpha.
2127 o Minor bugfixes (relay, statistics):
2128 - Report the correct connection statistics in our extrainfo
2129 documents. Previously there was a problem in the file loading
2130 function which would wrongly truncate a state file, causing the
2131 wrong information to be reported. Fixes bug 40226; bugfix
2134 o Minor bugfixes (SOCKS5):
2135 - Handle partial SOCKS5 messages correctly. Previously, our code
2136 would send an incorrect error message if it got a SOCKS5 request
2137 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
2140 Changes in version 0.4.5.2-alpha - 2020-11-23
2141 Tor 0.4.5.2-alpha is the second alpha release in the 0.4.5.x series.
2142 It fixes several bugs present in earlier releases, including one that
2143 made it impractical to run relays on Windows. It also adds a few small
2144 safety features to improve Tor's behavior in the presence of strange
2145 compile-time options, misbehaving proxies, and future versions
2148 o Major bugfixes (relay, windows):
2149 - Fix a bug in our implementation of condition variables on Windows.
2150 Previously, a relay on Windows would use 100% CPU after running
2151 for some time. Because of this change, Tor now require Windows
2152 Vista or later to build and run. Fixes bug 30187; bugfix on
2153 0.2.6.3-alpha. (This bug became more serious in 0.3.1.1-alpha with
2154 the introduction of consensus diffs.) Patch by Daniel Pinto.
2156 o Minor features (compilation):
2157 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
2158 later. There are a number of APIs newly deprecated in OpenSSL
2159 3.0.0 that Tor still requires. (A later version of Tor will try to
2160 stop depending on these APIs.) Closes ticket 40165.
2162 o Minor features (protocol, proxy support, defense in depth):
2163 - Respond more deliberately to misbehaving proxies that leave
2164 leftover data on their connections, so as to make Tor even less
2165 likely to allow the proxies to pass their data off as having come
2166 from a relay. Closes ticket 40017.
2168 o Minor features (safety):
2169 - Log a warning at startup if Tor is built with compile-time options
2170 that are likely to make it less stable or reliable. Closes
2173 o Minor bugfixes (circuit, handshake):
2174 - In the v3 handshaking code, use connection_or_change_state() to
2175 change the state. Previously, we changed the state directly, but
2176 this did not pass the state change to the pubsub or channel
2177 objects, potentially leading to bugs. Fixes bug 32880; bugfix on
2178 0.2.3.6-alpha. Patch by Neel Chauhan.
2180 o Minor bugfixes (compilation):
2181 - Use the correct 'ranlib' program when building libtor.a.
2182 Previously we used the default ranlib, which broke some kinds of
2183 cross-compilation. Fixes bug 40172; bugfix on 0.4.5.1-alpha.
2184 - Remove a duplicate typedef in metrics_store.c. Fixes bug 40177;
2185 bugfix on 0.4.5.1-alpha.
2186 - When USDT tracing is enabled, and STAP_PROBEV() is missing, don't
2187 attempt to build. Linux supports that macro but not the BSDs.
2188 Fixes bug 40174; bugfix on 0.4.5.1-alpha.
2190 o Minor bugfixes (configuration):
2191 - Exit Tor on a misconfiguration when the Bridge line is configured
2192 to use a transport but no corresponding ClientTransportPlugin can
2193 be found. Prior to this fix, Tor would attempt to connect to the
2194 bridge directly without using the transport, making it easier for
2195 adversaries to notice the bridge. Fixes bug 25528; bugfix
2197 - Fix an issue where an ORPort was compared with other kinds of
2198 ports, when it should have been only checked against other
2199 ORPorts. This bug would lead to "DirPort auto" getting ignored.
2200 Fixes bug 40195; bugfix on 0.4.5.1-alpha.
2201 - Fix a bug where a second non-ORPort with a variant family (ex:
2202 SocksPort [::1]:9050) would be ignored due to a configuration
2203 parsing error. Fixes bug 40183; bugfix on 0.4.5.1-alpha.
2205 o Minor bugfixes (crash, relay, signing key):
2206 - Avoid assertion failures when we run Tor from the command line
2207 with `--key-expiration sign`, but an ORPort is not set. Fixes bug
2208 40015; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
2210 o Minor bugfixes (logging):
2211 - Remove trailing whitespace from control event log messages. Fixes
2212 bug 32178; bugfix on 0.1.1.1-alpha. Based on a patch by
2214 - Turn warning-level log message about SENDME failure into a debug-
2215 level message. (This event can happen naturally, and is no reason
2216 for concern). Fixes bug 40142; bugfix on 0.4.1.1-alpha.
2218 o Minor bugfixes (relay, address discovery):
2219 - Don't trigger an IP change when no new valid IP can be found.
2220 Fixes bug 40071; bugfix on 0.4.5.1-alpha.
2221 - When attempting to discover our IP, use a simple test circuit,
2222 rather than a descriptor fetch: the same address information is
2223 present in NETINFO cells, and is better authenticated there. Fixes
2224 bug 40071; bugfix on 0.4.5.1-alpha.
2226 o Minor bugfixes (testing):
2227 - Fix the `config/parse_tcp_proxy_line` test so that it works
2228 correctly on systems where the DNS provider hijacks invalid
2229 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
2230 - Fix unit tests that used newly generated list of routers so that
2231 they check them with respect to the date when they were generated,
2232 not with respect to the current time. Fixes bug 40187; bugfix
2234 - Fix our Python reference-implementation for the v3 onion service
2235 handshake so that it works correctly with the version of hashlib
2236 provided by Python 3.9. Fixes part of bug 40179; bugfix
2238 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
2239 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
2241 o Removed features (controller):
2242 - Remove the "GETINFO network-status" controller command. It has
2243 been deprecated since 0.3.1.1-alpha. Closes ticket 22473.
2246 Changes in version 0.4.4.6 - 2020-11-12
2247 Tor 0.4.4.6 is the second stable release in the 0.4.4.x series. It
2248 backports fixes from later releases, including a fix for TROVE-2020-
2249 005, a security issue that could be used, under certain cases, by an
2250 adversary to observe traffic patterns on a limited number of circuits
2251 intended for a different relay.
2253 o Major bugfixes (security, backport from 0.4.5.1-alpha):
2254 - When completing a channel, relays now check more thoroughly to
2255 make sure that it matches any pending circuits before attaching
2256 those circuits. Previously, address correctness and Ed25519
2257 identities were not checked in this case, but only when extending
2258 circuits on an existing channel. Fixes bug 40080; bugfix on
2259 0.2.7.2-alpha. Resolves TROVE-2020-005.
2261 o Minor features (directory authorities, backport from 0.4.5.1-alpha):
2262 - Authorities now list a different set of protocols as required and
2263 recommended. These lists have been chosen so that only truly
2264 recommended and/or required protocols are included, and so that
2265 clients using 0.2.9 or later will continue to work (even though
2266 they are not supported), whereas only relays running 0.3.5 or
2267 later will meet the requirements. Closes ticket 40162.
2268 - Make it possible to specify multiple ConsensusParams torrc lines.
2269 Now directory authority operators can for example put the main
2270 ConsensusParams config in one torrc file and then add to it from a
2271 different torrc file. Closes ticket 40164.
2273 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
2274 - Tor no longer allows subprotocol versions larger than 63.
2275 Previously version numbers up to UINT32_MAX were allowed, which
2276 significantly complicated our code. Implements proposal 318;
2277 closes ticket 40133.
2279 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
2280 - Fix a rendezvous cache unit test that was triggering an underflow
2281 on the global rend cache allocation. Fixes bug 40125; bugfix
2283 - Fix another rendezvous cache unit test that was triggering an
2284 underflow on the global rend cache allocation. Fixes bug 40126;
2285 bugfix on 0.2.8.1-alpha.
2287 o Minor bugfixes (compilation, backport from 0.4.5.1-alpha):
2288 - Fix compiler warnings that would occur when building with
2289 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
2290 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
2291 - Resolve a compilation warning that could occur in
2292 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
2294 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
2295 - Remove a debug logging statement that uselessly spammed the logs.
2296 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2298 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
2299 - Avoid a fatal assert() when failing to create a listener
2300 connection for an address that was in use. Fixes bug 40073; bugfix
2303 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
2304 - For HSFETCH commands on v2 onion services addresses, check the
2305 length of bytes decoded, not the base32 length. Fixes bug 34400;
2306 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
2309 Changes in version 0.4.3.7 - 2020-11-12
2310 Tor 0.4.3.7 backports several bugfixes from later releases. It
2311 includes a fix for TROVE-2020-005, a security issue that could be
2312 used, under certain cases, by an adversary to observe traffic patterns
2313 on a limited number of circuits intended for a different relay.
2315 Please be aware that support for the 0.4.3.x series will end on 15
2316 February 2021. Please upgrade to 0.4.4.x or 0.4.5.x before then, or
2317 downgrade to 0.3.5.x, which will be supported until at least 1
2320 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
2321 - Replace the 148 fallback directories originally included in Tor
2322 0.4.1.4-rc (of which around 105 are still functional) with a list
2323 of 144 fallbacks generated in July 2020. Closes ticket 40061.
2325 o Major bugfixes (security, backport from 0.4.5.1-alpha):
2326 - When completing a channel, relays now check more thoroughly to
2327 make sure that it matches any pending circuits before attaching
2328 those circuits. Previously, address correctness and Ed25519
2329 identities were not checked in this case, but only when extending
2330 circuits on an existing channel. Fixes bug 40080; bugfix on
2331 0.2.7.2-alpha. Resolves TROVE-2020-005.
2333 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
2334 - When running with NSS enabled, make sure that NSS knows to expect
2335 nonblocking sockets. Previously, we set our TCP sockets as
2336 nonblocking, but did not tell NSS, which in turn could lead to
2337 unexpected blocking behavior. Fixes bug 40035; bugfix
2340 o Minor features (security, backport from 0.4.4.4-rc):
2341 - Channels using obsolete versions of the Tor link protocol are no
2342 longer allowed to circumvent address-canonicity checks. (This is
2343 only a minor issue, since such channels have no way to set ed25519
2344 keys, and therefore should always be rejected for circuits that
2345 specify ed25519 identities.) Closes ticket 40081.
2347 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
2348 - Tor no longer allows subprotocol versions larger than 63.
2349 Previously version numbers up to UINT32_MAX were allowed, which
2350 significantly complicated our code. Implements proposal 318;
2351 closes ticket 40133.
2353 o Minor features (tests, backport from 0.4.4.5):
2354 - Our "make check" target now runs the unit tests in 8 parallel
2355 chunks. Doing this speeds up hardened CI builds by more than a
2356 factor of two. Closes ticket 40098.
2358 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
2359 - Fix a rendezvous cache unit test that was triggering an underflow
2360 on the global rend cache allocation. Fixes bug 40125; bugfix
2362 - Fix another rendezvous cache unit test that was triggering an
2363 underflow on the global rend cache allocation. Fixes bug 40126;
2364 bugfix on 0.2.8.1-alpha.
2366 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
2367 - Fix a correctness bug that could cause an assertion failure if we
2368 ever tried using the buf_move_all() function with an empty input
2369 buffer. As far as we know, no released versions of Tor do this.
2370 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
2372 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
2373 - Remove a debug logging statement that uselessly spammed the logs.
2374 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2376 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
2377 - On a bridge, treat all connections from an ExtORPort as remote by
2378 default for the purposes of rate-limiting. Previously, bridges
2379 would treat the connection as local unless they explicitly
2380 received a "USERADDR" command. ExtORPort connections still count
2381 as local if there is a USERADDR command with an explicit local
2382 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
2384 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
2385 - Avoid a fatal assert() when failing to create a listener
2386 connection for an address that was in use. Fixes bug 40073; bugfix
2389 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
2390 - Adjust the rules for when to warn about having too many
2391 connections to other relays. Previously we'd tolerate up to 1.5
2392 connections per relay on average. Now we tolerate more connections
2393 for directory authorities, and raise the number of total
2394 connections we need to see before we warn. Fixes bug 33880; bugfix
2397 o Minor bugfixes (tests, 0.4.4.5):
2398 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
2399 on its own. Previously, it would exit with an error. Fixes bug
2400 40099; bugfix on 0.2.8.1-alpha.
2402 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
2403 - For HSFETCH commands on v2 onion services addresses, check the
2404 length of bytes decoded, not the base32 length. Fixes bug 34400;
2405 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
2407 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
2408 - Fix a bug that prevented Tor from starting if its log file grew
2409 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
2411 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
2412 - Add a deprecation warning for version 2 onion services. Closes
2415 o Removed features (backport from 0.4.4.3-alpha):
2416 - Our "check-local" test target no longer tries to use the
2417 Coccinelle semantic patching tool parse all the C files. While it
2418 is a good idea to try to make sure Coccinelle works on our C
2419 before we run a Coccinelle patch, doing so on every test run has
2420 proven to be disruptive. You can still run this tool manually with
2421 "make check-cocci". Closes ticket 40030. ticket 40030.
2424 Changes in version 0.3.5.12 - 2020-11-12
2425 Tor 0.4.3.7 backports several bugfixes from later releases. It
2426 includes a fix for TROVE-2020-005, a security issue that could be
2427 used, under certain cases, by an adversary to observe traffic patterns
2428 on a limited number of circuits intended for a different relay.
2430 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
2431 - Replace the 148 fallback directories originally included in Tor
2432 0.4.1.4-rc (of which around 105 are still functional) with a list
2433 of 144 fallbacks generated in July 2020. Closes ticket 40061.
2435 o Major bugfixes (security, backport from 0.4.5.1-alpha):
2436 - When completing a channel, relays now check more thoroughly to
2437 make sure that it matches any pending circuits before attaching
2438 those circuits. Previously, address correctness and Ed25519
2439 identities were not checked in this case, but only when extending
2440 circuits on an existing channel. Fixes bug 40080; bugfix on
2441 0.2.7.2-alpha. Resolves TROVE-2020-005.
2443 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
2444 - When running with NSS enabled, make sure that NSS knows to expect
2445 nonblocking sockets. Previously, we set our TCP sockets as
2446 nonblocking, but did not tell NSS, which in turn could lead to
2447 unexpected blocking behavior. Fixes bug 40035; bugfix
2450 o Minor features (security, backport from 0.4.4.4-rc):
2451 - Channels using obsolete versions of the Tor link protocol are no
2452 longer allowed to circumvent address-canonicity checks. (This is
2453 only a minor issue, since such channels have no way to set ed25519
2454 keys, and therefore should always be rejected for circuits that
2455 specify ed25519 identities.) Closes ticket 40081.
2457 o Minor features (debugging, directory system):
2458 - Don't crash when we find a non-guard with a guard-fraction value
2459 set. Instead, log a bug warning, in an attempt to figure out how
2460 this happened. Diagnostic for ticket 32868.
2462 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
2463 - Tor no longer allows subprotocol versions larger than 63.
2464 Previously version numbers up to UINT32_MAX were allowed, which
2465 significantly complicated our code. Implements proposal 318;
2466 closes ticket 40133.
2468 o Minor features (tests, backport from 0.4.4.5):
2469 - Our "make check" target now runs the unit tests in 8 parallel
2470 chunks. Doing this speeds up hardened CI builds by more than a
2471 factor of two. Closes ticket 40098.
2473 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
2474 - Fix a rendezvous cache unit test that was triggering an underflow
2475 on the global rend cache allocation. Fixes bug 40125; bugfix
2477 - Fix another rendezvous cache unit test that was triggering an
2478 underflow on the global rend cache allocation. Fixes bug 40126;
2479 bugfix on 0.2.8.1-alpha.
2481 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
2482 - Fix a correctness bug that could cause an assertion failure if we
2483 ever tried using the buf_move_all() function with an empty input
2484 buffer. As far as we know, no released versions of Tor do this.
2485 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
2487 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
2488 - Remove a debug logging statement that uselessly spammed the logs.
2489 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2491 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
2492 - On a bridge, treat all connections from an ExtORPort as remote by
2493 default for the purposes of rate-limiting. Previously, bridges
2494 would treat the connection as local unless they explicitly
2495 received a "USERADDR" command. ExtORPort connections still count
2496 as local if there is a USERADDR command with an explicit local
2497 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
2499 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
2500 - Avoid a fatal assert() when failing to create a listener
2501 connection for an address that was in use. Fixes bug 40073; bugfix
2504 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
2505 - Adjust the rules for when to warn about having too many
2506 connections to other relays. Previously we'd tolerate up to 1.5
2507 connections per relay on average. Now we tolerate more connections
2508 for directory authorities, and raise the number of total
2509 connections we need to see before we warn. Fixes bug 33880; bugfix
2512 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
2513 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
2514 descriptors, when the IPv6 port was configured as "auto". Fixes
2515 bug 32588; bugfix on 0.2.3.9-alpha.
2517 o Minor bugfixes (tests, 0.4.4.5):
2518 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
2519 on its own. Previously, it would exit with an error. Fixes bug
2520 40099; bugfix on 0.2.8.1-alpha.
2522 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
2523 - Fix a bug that prevented Tor from starting if its log file grew
2524 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
2526 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
2527 - Add a deprecation warning for version 2 onion services. Closes
2531 Changes in version 0.4.5.1-alpha - 2020-11-01
2532 Tor 0.4.5.1-alpha is the first alpha release in the 0.4.5.x series. It
2533 improves support for IPv6, address discovery and self-testing, code
2534 metrics and tracing.
2536 This release also fixes TROVE-2020-005, a security issue that could be
2537 used, under certain cases, by an adversary to observe traffic patterns
2538 on a limited number of circuits intended for a different relay. To
2539 mount this attack, the adversary would need to actively extend
2540 circuits to an incorrect address, as well as compromise a relay's
2541 legacy RSA-1024 key. We'll be backporting this fix to other release
2542 series soon, after it has had some testing.
2544 Here are the changes since 0.4.4.5.
2546 o Major features (build):
2547 - When building Tor, first link all object files into a single
2548 static library. This may help with embedding Tor in other
2549 programs. Note that most Tor functions do not constitute a part of
2550 a stable or supported API: only those functions in tor_api.h
2551 should be used if embedding Tor. Closes ticket 40127.
2553 o Major features (metrics):
2554 - Introduce a new MetricsPort which exposes, through an HTTP
2555 interface, a series of metrics that tor collects at runtime. At
2556 the moment, the only supported output format is Prometheus data
2557 model. Closes ticket 40063. See the manual page for more
2558 information and security considerations.
2559 o Major features (relay, IPv6):
2560 - The torrc option Address now supports IPv6. This unifies our
2561 address discovery interface to support IPv4, IPv6, and hostnames.
2562 Closes ticket 33233.
2563 - Launch IPv4 and IPv6 ORPort self-test circuits on relays and
2564 bridges. Closes ticket 33222.
2565 - Relays now automatically bind on IPv6 for their ORPort, unless
2566 specified otherwise with the IPv4Only flag. Closes ticket 33246.
2567 - When a relay with IPv6 support is told to open a connection to
2568 another relay, and the extend cell lists both IPv4 and IPv6
2569 addresses, the first relay now picks randomly which address to
2570 use. Closes ticket 33220.
2571 - Relays now track their IPv6 ORPort reachability separately from
2572 the reachability of their IPv4 ORPort. They will not publish a
2573 descriptor unless _both_ ports appear to be externally reachable.
2574 Closes ticket 34067.
2576 o Major features (tracing):
2577 - Add event-tracing library support for USDT and LTTng-UST, and a
2578 few tracepoints in the circuit subsystem. More will come
2579 incrementally. This feature is compiled out by default: it needs
2580 to be enabled at configure time. See documentation in
2581 doc/HACKING/Tracing.md. Closes ticket 32910.
2583 o Major bugfixes (security):
2584 - When completing a channel, relays now check more thoroughly to
2585 make sure that it matches any pending circuits before attaching
2586 those circuits. Previously, address correctness and Ed25519
2587 identities were not checked in this case, but only when extending
2588 circuits on an existing channel. Fixes bug 40080; bugfix on
2589 0.2.7.2-alpha. Resolves TROVE-2020-005.
2591 o Major bugfixes (TLS, buffer):
2592 - When attempting to read N bytes on a TLS connection, really try to
2593 read all N bytes. Previously, Tor would stop reading after the
2594 first TLS record, which can be smaller than the N bytes requested,
2595 and not check for more data until the next mainloop event. Fixes
2596 bug 40006; bugfix on 0.1.0.5-rc.
2598 o Minor features (address discovery):
2599 - If no Address statements are found, relays now prioritize guessing
2600 their address by looking at the local interface instead of the
2601 local hostname. If the interface address can't be found, the local
2602 hostname is used. Closes ticket 33238.
2604 o Minor features (admin tools):
2605 - Add a new --format argument to -key-expiration option to allow
2606 specifying the time format of the expiration date. Adds Unix
2607 timestamp format support. Patch by Daniel Pinto. Closes
2610 o Minor features (bootstrap reporting):
2611 - When reporting bootstrapping status on a relay, do not consider
2612 connections that have never been the target of an origin circuit.
2613 Previously, all connection failures were treated as potential
2614 bootstrapping failures, including connections that had been opened
2615 because of client requests. Closes ticket 25061.
2617 o Minor features (build):
2618 - When running the configure script, try to detect version
2619 mismatches between the OpenSSL headers and libraries, and suggest
2620 that the user should try "--with-openssl-dir". Closes 40138.
2621 - If the configure script has given any warnings, remind the user
2622 about them at the end of the script. Related to 40138.
2624 o Minor features (configuration):
2625 - Allow using wildcards (* and ?) with the %include option on
2626 configuration files. Closes ticket 25140. Patch by Daniel Pinto.
2627 - Allow the configuration options EntryNodes, ExcludeNodes,
2628 ExcludeExitNodes, ExitNodes, MiddleNodes, HSLayer2Nodes and
2629 HSLayer3Nodes to be specified multiple times. Closes ticket 28361.
2630 Patch by Daniel Pinto.
2632 o Minor features (control port):
2633 - Add a DROPTIMEOUTS command to drop circuit build timeout history
2634 and reset the current timeout. Closes ticket 40002.
2635 - When a stream enters the AP_CONN_STATE_CONTROLLER_WAIT status,
2636 send a control port event. Closes ticket 32190. Patch by
2638 - Introduce GETINFO "stats/ntor/{assigned/requested}" and
2639 "stats/tap/{assigned/requested}" to get the NTor and TAP circuit
2640 onion handshake counts respectively. Closes ticket 28279. Patch by
2643 o Minor features (control port, IPv6):
2644 - Tor relays now try to report to the controller when they are
2645 launching an IPv6 self-test. Closes ticket 34068.
2646 - Introduce "GETINFO address/v4" and "GETINFO address/v6" in the
2647 control port to fetch the Tor host's respective IPv4 or IPv6
2648 address. We keep "GETINFO address" for backwards-compatibility.
2649 Closes ticket 40039. Patch by Neel Chauhan.
2651 o Minor features (directory authorities):
2652 - Authorities now list a different set of protocols as required and
2653 recommended. These lists have been chosen so that only truly
2654 recommended and/or required protocols are included, and so that
2655 clients using 0.2.9 or later will continue to work (even though
2656 they are not supported), whereas only relays running 0.3.5 or
2657 later will meet the requirements. Closes ticket 40162.
2658 - Add a new consensus method 30 that removes the unnecessary "="
2659 padding from ntor-onion-key. Closes ticket 7869. Patch by
2661 - Directory authorities now reject descriptors from relays running
2662 Tor versions from the obsolete 0.4.1 series. Resolves ticket
2663 34357. Patch by Neel Chauhan.
2664 - Make it possible to specify multiple ConsensusParams torrc lines.
2665 Now directory authority operators can for example put the main
2666 ConsensusParams config in one torrc file and then add to it from a
2667 different torrc file. Closes ticket 40164.
2668 - The AssumeReachable option no longer stops directory authorities
2669 from checking whether other relays are running. A new
2670 AuthDirTestReachability option can be used to disable these
2671 checks. Closes ticket 34445.
2672 - When looking for possible Sybil attacks, also consider IPv6
2673 addresses. Two routers are considered to have "the same" address
2674 by this metric if they are in the same /64 network. Patch from
2675 Maurice Pibouin. Closes ticket 7193.
2677 o Minor features (directory authorities, IPv6):
2678 - Make authorities add their IPv6 ORPort (if any) to the trusted
2679 servers list. Authorities previously added only their IPv4
2680 addresses. Closes ticket 32822.
2682 o Minor features (ed25519, relay):
2683 - Save a relay's base64-encoded ed25519 identity key to the data
2684 directory in a file named fingerprint-ed25519. Closes ticket
2685 30642. Patch by Neel Chauhan.
2687 o Minor features (heartbeat):
2688 - Include the total number of inbound and outbound IPv4 and IPv6
2689 connections in the heartbeat message. Closes ticket 29113.
2691 o Minor features (IPv6, ExcludeNodes):
2692 - Handle IPv6 addresses in ExcludeNodes; previously they were
2693 ignored. Closes ticket 34065. Patch by Neel Chauhan.
2695 o Minor features (logging):
2696 - Add the running glibc version to the log, and the compiled glibc
2697 version to the library list returned when using --library-versions.
2698 Patch from Daniel Pinto. Closes ticket 40047.
2699 - Consider an HTTP 301 response to be an error (like a 404) when
2700 processing a directory response. Closes ticket 40053.
2701 - Log directory fetch statistics as a single line. Closes
2703 - Provide more complete descriptions of our connections when logging
2704 about them. Closes ticket 40041.
2705 - When describing a relay in the logs, we now include its ed25519
2706 identity. Closes ticket 22668.
2708 o Minor features (onion services):
2709 - Only overwrite an onion service's existing hostname file if its
2710 contents are wrong. This enables read-only onion-service
2711 directories. Resolves ticket 40062. Patch by Neel Chauhan.
2713 o Minor features (pluggable transports):
2714 - Add an OutboundBindAddressPT option to allow users to specify
2715 which IPv4 and IPv6 address pluggable transports should use for
2716 outgoing IP packets. Tor does not have a way to enforce that the
2717 pluggable transport honors this option, so each pluggable transport
2718 needs to implement support on its own. Closes ticket 5304.
2720 o Minor features (relay address tracking):
2721 - We now store relay addresses for OR connections in a more logical
2722 way. Previously we would sometimes overwrite the actual address of
2723 a connection with a "canonical address", and then store the "real
2724 address" elsewhere to remember it. We now track the "canonical
2725 address" elsewhere for the cases where we need it, and leave the
2726 connection's address alone. Closes ticket 33898.
2728 o Minor features (relay):
2729 - If a relay is unable to discover its address, attempt to learn it
2730 from the NETINFO cell. Closes ticket 40022.
2731 - Log immediately when launching a relay self-check. Previously we
2732 would try to log before launching checks, or approximately when we
2733 intended to launch checks, but this tended to be error-prone.
2734 Closes ticket 34137.
2736 o Minor features (relay, address discovery):
2737 - If Address option is not found in torrc, attempt to learn our
2738 address with the configured ORPort address if any. Closes
2741 o Minor features (relay, IPv6):
2742 - Add an AssumeReachableIPv6 option to disable self-checking IPv6
2743 reachability. Closes part of ticket 33224.
2744 - Add new "assume-reachable" and "assume-reachable-ipv6" consensus
2745 parameters to be used in an emergency to tell relays that they
2746 should publish even if they cannot complete their ORPort self-
2747 checks. Closes ticket 34064 and part of 33224.
2748 - Allow relays to send IPv6-only extend cells. Closes ticket 33222.
2749 - Declare support for the Relay=3 subprotocol version. Closes
2751 - When launching IPv6 ORPort self-test circuits, make sure that the
2752 second-last hop can initiate an IPv6 extend. Closes ticket 33222.
2754 o Minor features (specification update):
2755 - Several fields in microdescriptors, router descriptors, and
2756 consensus documents that were formerly optional are now required.
2757 Implements proposal 315; closes ticket 40132.
2759 o Minor features (state management):
2760 - When loading the state file, remove entries from the statefile
2761 that have been obsolete for a long time. Ordinarily Tor preserves
2762 unrecognized entries in order to keep forward-compatibility, but
2763 these entries have not actually been used in any release since
2764 before 0.3.5.x. Closes ticket 40137.
2766 o Minor features (statistics, ipv6):
2767 - Relays now publish IPv6-specific counts of single-direction versus
2768 bidirectional relay connections. Closes ticket 33264.
2769 - Relays now publish their IPv6 read and write statistics over time,
2770 if statistics are enabled. Closes ticket 33263.
2772 o Minor features (subprotocol versions):
2773 - Tor no longer allows subprotocol versions larger than 63.
2774 Previously version numbers up to UINT32_MAX were allowed, which
2775 significantly complicated our code. Implements proposal 318;
2776 closes ticket 40133.
2777 - Use the new limitations on subprotocol versions due to proposal
2778 318 to simplify our implementation. Part of ticket 40133.
2780 o Minor features (testing configuration):
2781 - The TestingTorNetwork option no longer implicitly sets
2782 AssumeReachable to 1. This change allows us to test relays' self-
2783 testing mechanisms, and to test authorities' relay-testing
2784 functionality. Closes ticket 34446.
2786 o Minor features (testing):
2787 - Added unit tests for channel_matches_target_addr_for_extend().
2788 Closes Ticket 33919. Patch by MrSquanchee.
2790 o Minor features (tests, v2 onion services):
2791 - Fix a rendezvous cache unit test that was triggering an underflow
2792 on the global rend cache allocation. Fixes bug 40125; bugfix
2794 - Fix another rendezvous cache unit test that was triggering an
2795 underflow on the global rend cache allocation. Fixes bug 40126;
2796 bugfix on 0.2.8.1-alpha.
2798 o Minor bugfixes (circuit padding):
2799 - When circpad_send_padding_cell_for_callback is called,
2800 `is_padding_timer_scheduled` flag was not reset. Now it is set to
2801 0 at the top of that function. Fixes bug 32671; bugfix
2803 - Add a per-circuit padding machine instance counter, so we can
2804 differentiate between shutdown requests for old machines on a
2805 circuit. Fixes bug 30992; bugfix on 0.4.1.1-alpha.
2806 - Add the ability to keep circuit padding machines if they match a
2807 set of circuit states or purposes. This allows us to have machines
2808 that start up under some conditions but don't shut down under
2809 others. We now use this mask to avoid starting up introduction
2810 circuit padding again after the machines have already completed.
2811 Fixes bug 32040; bugfix on 0.4.1.1-alpha.
2813 o Minor bugfixes (compatibility):
2814 - Strip '\r' characters when reading text files on Unix platforms.
2815 This should resolve an issue where a relay operator migrates a
2816 relay from Windows to Unix, but does not change the line ending of
2817 Tor's various state files to match the platform, and the CRLF line
2818 endings from Windows end up leaking into other files such as the
2819 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
2821 o Minor bugfixes (compilation):
2822 - Fix compiler warnings that would occur when building with
2823 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
2824 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
2825 - Resolve a compilation warning that could occur in
2826 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
2828 o Minor bugfixes (configuration):
2829 - Fix bug where %including a pattern ending with */ would include
2830 files and folders (instead of folders only) in versions of glibc <
2831 2.19. Fixes bug 40141; bugfix on 0.4.5.0-alpha-dev. Patch by
2834 o Minor bugfixes (control port):
2835 - Make sure we send the SOCKS request address in relay begin cells
2836 when a stream is attached with the purpose
2837 CIRCUIT_PURPOSE_CONTROLLER. Fixes bug 33124; bugfix on 0.0.5.
2838 Patch by Neel Chauhan.
2840 o Minor bugfixes (logging):
2841 - Remove a debug logging statement that uselessly spammed the logs.
2842 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2843 - When logging a rate-limited message about how many messages have
2844 been suppressed in the last N seconds, give an accurate value for
2845 N, rounded up to the nearest minute. Previously we would report
2846 the size of the rate-limiting interval, regardless of when the
2847 messages started to occur. Fixes bug 19431; bugfix
2850 o Minor bugfixes (relay configuration, crash):
2851 - Avoid a fatal assert() when failing to create a listener
2852 connection for an address that was in use. Fixes bug 40073; bugfix
2855 o Minor bugfixes (rust, protocol versions):
2856 - Declare support for the onion service introduction point denial of
2857 service extensions when building with Rust. Fixes bug 34248;
2858 bugfix on 0.4.2.1-alpha.
2859 - Make Rust protocol version support checks consistent with the
2860 undocumented error behavior of the corresponding C code. Fixes bug
2861 34251; bugfix on 0.3.3.5-rc.
2863 o Minor bugfixes (self-testing):
2864 - When receiving an incoming circuit, only accept it as evidence
2865 that we are reachable if the declared address of its channel is
2866 the same address we think that we have. Otherwise, it could be
2867 evidence that we're reachable on some other address. Fixes bug
2868 20165; bugfix on 0.1.0.1-rc.
2870 o Minor bugfixes (spec conformance):
2871 - Use the correct key type when generating signing->link
2872 certificates. Fixes bug 40124; bugfix on 0.2.7.2-alpha.
2874 o Minor bugfixes (subprotocol versions):
2875 - Consistently reject extra commas, instead of only rejecting
2876 leading commas. Fixes bug 27194; bugfix on 0.2.9.4-alpha.
2877 - In summarize_protover_flags(), treat empty strings the same as
2878 NULL. This prevents protocols_known from being set. Previously, we
2879 treated empty strings as normal strings, which led to
2880 protocols_known being set. Fixes bug 34232; bugfix on
2881 0.3.3.2-alpha. Patch by Neel Chauhan.
2883 o Minor bugfixes (v2 onion services):
2884 - For HSFETCH commands on v2 onion services addresses, check the
2885 length of bytes decoded, not the base32 length. Fixes bug 34400;
2886 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
2888 o Code simplification and refactoring:
2889 - Add and use a set of functions to perform down-casts on constant
2890 connection and channel pointers. Closes ticket 40046.
2891 - Refactor our code that logs descriptions of connections, channels,
2892 and the peers on them, to use a single call path. This change
2893 enables us to refactor the data types that they use, and eliminates
2894 many confusing usages of those types. Closes ticket 40041.
2895 - Refactor some common node selection code into a single function.
2896 Closes ticket 34200.
2897 - Remove the now-redundant 'outbuf_flushlen' field from our
2898 connection type. It was previously used for an older version of
2899 our rate-limiting logic. Closes ticket 33097.
2900 - Rename "fascist_firewall_*" identifiers to "reachable_addr_*"
2901 instead, for consistency with other code. Closes ticket 18106.
2902 - Rename functions about "advertised" ports which are not in fact
2903 guaranteed to return the ports that have been advertised. Closes
2905 - Split implementation of several command line options from
2906 options_init_from_torrc into smaller isolated functions. Patch by
2907 Daniel Pinto. Closes ticket 40102.
2908 - When an extend cell is missing an IPv4 or IPv6 address, fill in
2909 the address from the extend info. This is similar to what was done
2910 in ticket 33633 for ed25519 keys. Closes ticket 33816. Patch by
2913 o Deprecated features:
2914 - The "non-builtin" argument to the "--dump-config" command is now
2915 deprecated. When it works, it behaves the same as "short", which
2916 you should use instead. Closes ticket 33398.
2919 - Replace URLs from our old bugtracker so that they refer to the new
2920 bugtracker and wiki. Closes ticket 40101.
2923 - We no longer ship or build a "tor.service" file for use with
2924 systemd. No distribution included this script unmodified, and we
2925 don't have the expertise ourselves to maintain this in a way that
2926 all the various systemd-based distributions can use. Closes
2928 - We no longer ship support for the Android logging API. Modern
2929 versions of Android can use the syslog API instead. Closes
2931 - The "optimistic data" feature is now always on; there is no longer
2932 an option to disable it from the torrc file or from the consensus
2933 directory. Closes part of 40139.
2934 - The "usecreatefast" network parameter is now removed; there is no
2935 longer an option for authorities to turn it off. Closes part
2939 - Add unit tests for bandwidth statistics manipulation functions.
2940 Closes ticket 33812. Patch by MrSquanchee.
2942 o Code simplification and refactoring (autoconf):
2943 - Remove autoconf checks for unused funcs and headers. Closes ticket
2944 31699; Patch by @bduszel
2946 o Code simplification and refactoring (maintainer scripts):
2947 - Disable by default the pre-commit hook. Use the environment
2948 variable TOR_EXTRA_PRE_COMMIT_CHECKS in order to run it.
2949 Furthermore, stop running practracker in the pre-commit hook and
2950 make check-local. Closes ticket 40019.
2952 o Code simplification and refactoring (relay address):
2953 - Most of IPv4 representation was using "uint32_t". It has now been
2954 moved to use the internal "tor_addr_t" interface instead. This is
2955 so we can properly integrate IPv6 along IPv4 with common
2956 interfaces. Closes ticket 40043.
2958 o Documentation (manual page):
2959 - Move them from doc/ to doc/man/. Closes ticket 40044.
2960 - Describe the status of the "Sandbox" option more accurately. It is
2961 no longer "experimental", but it _is_ dependent on kernel and libc
2962 versions. Closes ticket 23378.
2964 o Documentation (tracing):
2965 - Document in depth the circuit subsystem trace events in the new
2966 doc/tracing/EventsCircuit.md. Closes ticket 40036.
2969 Changes in version 0.4.4.5 - 2020-09-15
2970 Tor 0.4.4.5 is the first stable release in the 0.4.4.x series. This
2971 series improves our guard selection algorithms, adds v3 onion balance
2972 support, improves the amount of code that can be disabled when running
2973 without relay support, and includes numerous small bugfixes and
2974 enhancements. It also lays the ground for some IPv6 features that
2975 we'll be developing more in the next (0.4.5) series.
2977 Per our support policy, we support each stable release series for nine
2978 months after its first stable release, or three months after the first
2979 stable release of the next series: whichever is longer. This means
2980 that 0.4.4.x will be supported until around June 2021--or later, if
2981 0.4.5.x is later than anticipated.
2983 Note also that support for 0.4.2.x has just ended; support for 0.4.3
2984 will continue until Feb 15, 2021. We still plan to continue supporting
2985 0.3.5.x, our long-term stable series, until Feb 2022.
2987 Below are the changes since 0.4.4.4-rc. For a complete list of changes
2988 since 0.4.3.6, see the ReleaseNotes file.
2990 o Major bugfixes (onion services, DoS):
2991 - Correct handling of parameters for the onion service DoS defense.
2992 Previously, the consensus parameters for the onion service DoS
2993 defenses were overwriting the parameters set by the service
2994 operator using HiddenServiceEnableIntroDoSDefense. Fixes bug
2995 40109; bugfix on 0.4.2.1-alpha.
2997 o Major bugfixes (stats, onion services):
2998 - Fix a bug where we were undercounting the Tor network's total
2999 onion service traffic, by ignoring any traffic originating from
3000 clients. Now we count traffic from both clients and services.
3001 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
3003 o Minor features (control port):
3004 - If a ClientName was specified in ONION_CLIENT_AUTH_ADD for an
3005 onion service, display it when we use ONION_CLIENT_AUTH_VIEW.
3006 Closes ticket 40089. Patch by Neel Chauhan.
3008 o Minor features (denial-of-service memory limiter):
3009 - Allow the user to configure even lower values for the
3010 MaxMemInQueues parameter. Relays now enforce a minimum of 64 MB,
3011 when previously the minimum was 256 MB. On clients, there is no
3012 minimum. Relays and clients will both warn if the value is set so
3013 low that Tor is likely to stop working. Closes ticket 24308.
3015 o Minor features (tests):
3016 - Our "make check" target now runs the unit tests in 8 parallel
3017 chunks. Doing this speeds up hardened CI builds by more than a
3018 factor of two. Closes ticket 40098.
3020 o Minor bugfixes (guard selection algorithm):
3021 - Avoid needless guard-related warning when upgrading from 0.4.3 to
3022 0.4.4. Fixes bug 40105; bugfix on 0.4.4.1-alpha.
3024 o Minor bugfixes (tests):
3025 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
3026 on its own. Previously, it would exit with an error. Fixes bug
3027 40099; bugfix on 0.2.8.1-alpha.
3030 Changes in version 0.4.4.3-alpha - 2020-07-27
3031 Tor 0.4.4.3-alpha fixes several annoyances in previous versions,
3032 including one affecting NSS users, and several affecting the Linux
3035 o Major features (fallback directory list):
3036 - Replace the 148 fallback directories originally included in Tor
3037 0.4.1.4-rc (of which around 105 are still functional) with a list
3038 of 144 fallbacks generated in July 2020. Closes ticket 40061.
3040 o Major bugfixes (NSS):
3041 - When running with NSS enabled, make sure that NSS knows to expect
3042 nonblocking sockets. Previously, we set our TCP sockets as
3043 nonblocking, but did not tell NSS, which in turn could lead to
3044 unexpected blocking behavior. Fixes bug 40035; bugfix
3047 o Minor bugfixes (linux seccomp2 sandbox):
3048 - Fix a regression on sandboxing rules for the openat() syscall. The
3049 fix for bug 25440 fixed the problem on systems with glibc >= 2.27
3050 but broke with versions of glibc. We now choose a rule based on
3051 the glibc version. Patch from Daniel Pinto. Fixes bug 27315;
3053 - Makes the seccomp sandbox allow the correct syscall for opendir
3054 according to the running glibc version. This fixes crashes when
3055 reloading torrc with sandbox enabled when running on glibc 2.15 to
3056 2.21 and 2.26. Patch from Daniel Pinto. Fixes bug 40020; bugfix
3059 o Minor bugfixes (relay, usability):
3060 - Adjust the rules for when to warn about having too many
3061 connections to other relays. Previously we'd tolerate up to 1.5
3062 connections per relay on average. Now we tolerate more connections
3063 for directory authorities, and raise the number of total
3064 connections we need to see before we warn. Fixes bug 33880; bugfix
3068 - Replace most http:// URLs in our code and documentation with
3069 https:// URLs. (We have left unchanged the code in src/ext/, and
3070 the text in LICENSE.) Closes ticket 31812. Patch from Jeremy Rand.
3073 - Our "check-local" test target no longer tries to use the
3074 Coccinelle semantic patching tool parse all the C files. While it
3075 is a good idea to try to make sure Coccinelle works on our C
3076 before we run a Coccinelle patch, doing so on every test run has
3077 proven to be disruptive. You can still run this tool manually with
3078 "make check-cocci". Closes ticket 40030.
3081 Changes in version 0.3.5.11 - 2020-07-09
3082 Tor 0.3.5.11 backports fixes from later tor releases, including several
3083 usability, portability, and reliability fixes.
3085 This release also fixes TROVE-2020-001, a medium-severity denial of
3086 service vulnerability affecting all versions of Tor when compiled with
3087 the NSS encryption library. (This is not the default configuration.)
3088 Using this vulnerability, an attacker could cause an affected Tor
3089 instance to crash remotely. This issue is also tracked as CVE-2020-
3090 15572. Anybody running a version of Tor built with the NSS library
3091 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3094 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
3095 - Fix a crash due to an out-of-bound memory access when Tor is
3096 compiled with NSS support. Fixes bug 33119; bugfix on
3097 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3100 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
3101 - Fix a bug that was preventing DoS defenses from running on bridges
3102 with a pluggable transport. Previously, the DoS subsystem was not
3103 given the transport name of the client connection, thus failed to
3104 find the GeoIP cache entry for that client address. Fixes bug
3105 33491; bugfix on 0.3.3.2-alpha.
3107 o Minor features (testing, backport from 0.4.3.4-rc):
3108 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
3109 variable to specify a list of space-separated test cases that
3110 should not be executed. We will use this to disable certain tests
3111 that are failing on Appveyor because of mismatched OpenSSL
3112 libraries. Part of ticket 33643.
3114 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
3115 - Use the correct 64-bit printf format when compiling with MINGW on
3116 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3118 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
3119 - Warn if the ContactInfo field is not set, and tell the relay
3120 operator that not having a ContactInfo field set might cause their
3121 relay to get rejected in the future. Fixes bug 33361; bugfix
3124 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
3125 - Resume use of preemptively-built circuits when UseEntryGuards is set
3126 to 0. We accidentally disabled this feature with that config
3127 setting, leading to slower load times. Fixes bug 34303; bugfix
3130 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
3131 - Avoid compiler warnings from Clang 10 related to the use of GCC-
3132 style "/* falls through */" comments. Both Clang and GCC allow
3133 __attribute__((fallthrough)) instead, so that's what we're using
3134 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
3136 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
3137 - Fix a compiler warning on platforms with 32-bit time_t values.
3138 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3140 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
3141 - When starting Tor any time after the first time in a process,
3142 register the thread in which it is running as the main thread.
3143 Previously, we only did this on Windows, which could lead to bugs
3144 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
3147 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
3148 - When reading PEM-encoded key data, tolerate CRLF line-endings even
3149 if we are not running on Windows. Previously, non-Windows hosts
3150 would reject these line-endings in certain positions, making
3151 certain key files hard to move from one host to another. Fixes bug
3152 33032; bugfix on 0.3.5.1-alpha.
3154 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
3155 - Downgrade a noisy log message that could occur naturally when
3156 receiving an extrainfo document that we no longer want. Fixes bug
3157 16016; bugfix on 0.2.6.3-alpha.
3159 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
3160 - Remove a BUG() warning that would cause a stack trace if an onion
3161 service descriptor was freed while we were waiting for a
3162 rendezvous circuit to complete. Fixes bug 28992; bugfix
3165 o Testing (CI, backport from 0.4.3.4-rc):
3166 - In our Appveyor Windows CI, copy required DLLs to test and app
3167 directories, before running tor's tests. This ensures that tor.exe
3168 and test*.exe use the correct version of each DLL. This fix is not
3169 required, but we hope it will avoid DLL search issues in future.
3170 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
3171 - On Appveyor, skip the crypto/openssl_version test, which is
3172 failing because of a mismatched library installation. Fix
3176 Changes in version 0.4.2.8 - 2020-07-09
3177 Tor 0.4.2.8 backports various fixes from later releases, including
3178 several that affect usability and portability.
3180 This release also fixes TROVE-2020-001, a medium-severity denial of
3181 service vulnerability affecting all versions of Tor when compiled with
3182 the NSS encryption library. (This is not the default configuration.)
3183 Using this vulnerability, an attacker could cause an affected Tor
3184 instance to crash remotely. This issue is also tracked as CVE-2020-
3185 15572. Anybody running a version of Tor built with the NSS library
3186 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3189 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
3190 - Fix a crash due to an out-of-bound memory access when Tor is
3191 compiled with NSS support. Fixes bug 33119; bugfix on
3192 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3195 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
3196 - Fix a bug that was preventing DoS defenses from running on bridges
3197 with a pluggable transport. Previously, the DoS subsystem was not
3198 given the transport name of the client connection, thus failed to
3199 find the GeoIP cache entry for that client address. Fixes bug
3200 33491; bugfix on 0.3.3.2-alpha.
3202 o Minor feature (sendme, flow control, backport form 0.4.3.4-rc):
3203 - Default to sending SENDME version 1 cells. (Clients are already
3204 sending these, because of a consensus parameter telling them to do
3205 so: this change only affects what clients would do if the
3206 consensus didn't contain a recommendation.) Closes ticket 33623.
3208 o Minor features (diagnostic, backport from 0.4.3.3-alpha):
3209 - Improve assertions and add some memory-poisoning code to try to
3210 track down possible causes of a rare crash (32564) in the EWMA
3211 code. Closes ticket 33290.
3213 o Minor features (testing, backport from 0.4.3.4-rc):
3214 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
3215 variable to specify a list of space-separated test cases that
3216 should not be executed. We will use this to disable certain tests
3217 that are failing on Appveyor because of mismatched OpenSSL
3218 libraries. Part of ticket 33643.
3220 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
3221 - Use the correct 64-bit printf format when compiling with MINGW on
3222 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3224 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
3225 - Warn if the ContactInfo field is not set, and tell the relay
3226 operator that not having a ContactInfo field set might cause their
3227 relay to get rejected in the future. Fixes bug 33361; bugfix
3230 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
3231 - Resume use of preemptively-built circuits when UseEntryGuards is set
3232 to 0. We accidentally disabled this feature with that config
3233 setting, leading to slower load times. Fixes bug 34303; bugfix
3236 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
3237 - Avoid compiler warnings from Clang 10 related to the use of GCC-
3238 style "/* falls through */" comments. Both Clang and GCC allow
3239 __attribute__((fallthrough)) instead, so that's what we're using
3240 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
3241 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
3244 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
3245 - Fix a compiler warning on platforms with 32-bit time_t values.
3246 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3248 o Minor bugfixes (controller protocol, backport from 0.4.3.2-alpha):
3249 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
3250 report them as SIGNAL events. Previously we would log a bug
3251 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
3253 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
3254 - When starting Tor any time after the first time in a process,
3255 register the thread in which it is running as the main thread.
3256 Previously, we only did this on Windows, which could lead to bugs
3257 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
3260 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
3261 - When reading PEM-encoded key data, tolerate CRLF line-endings even
3262 if we are not running on Windows. Previously, non-Windows hosts
3263 would reject these line-endings in certain positions, making
3264 certain key files hard to move from one host to another. Fixes bug
3265 33032; bugfix on 0.3.5.1-alpha.
3267 o Minor bugfixes (logging, backport from 0.4.3.2-rc):
3268 - When logging a bug, do not say "Future instances of this warning
3269 will be silenced" unless we are actually going to silence them.
3270 Previously we would say this whenever a BUG() check failed in the
3271 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
3273 o Minor bugfixes (logging, backport from 0.4.3.4-rc):
3274 - Flush stderr, stdout, and file logs during shutdown, if supported
3275 by the OS. This change helps make sure that any final logs are
3276 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
3278 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
3279 - Downgrade a noisy log message that could occur naturally when
3280 receiving an extrainfo document that we no longer want. Fixes bug
3281 16016; bugfix on 0.2.6.3-alpha.
3283 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
3284 - Remove a BUG() warning that would cause a stack trace if an onion
3285 service descriptor was freed while we were waiting for a
3286 rendezvous circuit to complete. Fixes bug 28992; bugfix
3289 o Testing (CI, backport from 0.4.3.4-rc):
3290 - In our Appveyor Windows CI, copy required DLLs to test and app
3291 directories, before running tor's tests. This ensures that tor.exe
3292 and test*.exe use the correct version of each DLL. This fix is not
3293 required, but we hope it will avoid DLL search issues in future.
3294 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
3295 - On Appveyor, skip the crypto/openssl_version test, which is
3296 failing because of a mismatched library installation. Fix
3300 Changes in version 0.4.3.6 - 2020-07-09
3301 Tor 0.4.3.6 backports several bugfixes from later releases, including
3302 some affecting usability.
3304 This release also fixes TROVE-2020-001, a medium-severity denial of
3305 service vulnerability affecting all versions of Tor when compiled with
3306 the NSS encryption library. (This is not the default configuration.)
3307 Using this vulnerability, an attacker could cause an affected Tor
3308 instance to crash remotely. This issue is also tracked as CVE-2020-
3309 15572. Anybody running a version of Tor built with the NSS library
3310 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3313 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
3314 - Fix a crash due to an out-of-bound memory access when Tor is
3315 compiled with NSS support. Fixes bug 33119; bugfix on
3316 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3319 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
3320 - Use the correct 64-bit printf format when compiling with MINGW on
3321 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3323 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
3324 - Resume use of preemptively-built circuits when UseEntryGuards is set
3325 to 0. We accidentally disabled this feature with that config
3326 setting, leading to slower load times. Fixes bug 34303; bugfix
3329 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
3330 - Fix a compiler warning on platforms with 32-bit time_t values.
3331 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3333 o Minor bugfixes (linux seccomp sandbox, nss, backport from 0.4.4.1-alpha):
3334 - Fix a startup crash when tor is compiled with --enable-nss and
3335 sandbox support is enabled. Fixes bug 34130; bugfix on
3336 0.3.5.1-alpha. Patch by Daniel Pinto.
3338 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
3339 - Downgrade a noisy log message that could occur naturally when
3340 receiving an extrainfo document that we no longer want. Fixes bug
3341 16016; bugfix on 0.2.6.3-alpha.
3343 o Minor bugfixes (manual page, backport from 0.4.4.1-alpha):
3344 - Update the man page to reflect that MinUptimeHidServDirectoryV2
3345 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
3347 o Minor bugfixes (onion service v3, backport from 0.4.4.1-alpha):
3348 - Prevent an assert() that would occur when cleaning the client
3349 descriptor cache, and attempting to close circuits for a non-
3350 decrypted descriptor (lacking client authorization). Fixes bug
3351 33458; bugfix on 0.4.2.1-alpha.
3353 o Minor bugfixes (portability, backport from 0.4.4.1-alpha):
3354 - Fix a portability error in the configure script, where we were
3355 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
3357 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
3358 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
3359 descriptors, when the IPv6 port was configured as "auto". Fixes
3360 bug 32588; bugfix on 0.2.3.9-alpha.
3362 o Documentation (backport from 0.4.4.1-alpha):
3363 - Fix several doxygen warnings related to imbalanced groups. Closes
3367 Changes in version 0.4.4.2-alpha - 2020-07-09
3368 This is the second alpha release in the 0.4.4.x series. It fixes a few
3369 bugs in the previous release, and solves a few usability,
3370 compatibility, and portability issues.
3372 This release also fixes TROVE-2020-001, a medium-severity denial of
3373 service vulnerability affecting all versions of Tor when compiled with
3374 the NSS encryption library. (This is not the default configuration.)
3375 Using this vulnerability, an attacker could cause an affected Tor
3376 instance to crash remotely. This issue is also tracked as CVE-2020-
3377 15572. Anybody running a version of Tor built with the NSS library
3378 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3381 o Major bugfixes (NSS, security):
3382 - Fix a crash due to an out-of-bound memory access when Tor is
3383 compiled with NSS support. Fixes bug 33119; bugfix on
3384 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3387 o Minor features (bootstrap reporting):
3388 - Report more detailed reasons for bootstrap failure when the
3389 failure happens due to a TLS error. Previously we would just call
3390 these errors "MISC" when they happened during read, and "DONE"
3391 when they happened during any other TLS operation. Closes
3394 o Minor features (directory authority):
3395 - Authorities now recommend the protocol versions that are supported
3396 by Tor 0.3.5 and later. (Earlier versions of Tor have been
3397 deprecated since January of this year.) This recommendation will
3398 cause older clients and relays to give a warning on startup, or
3399 when they download a consensus directory. Closes ticket 32696.
3401 o Minor features (entry guards):
3402 - Reinstate support for GUARD NEW/UP/DOWN control port events.
3403 Closes ticket 40001.
3405 o Minor features (linux seccomp2 sandbox, portability):
3406 - Allow Tor to build on platforms where it doesn't know how to
3407 report which syscall caused the linux seccomp2 sandbox to fail.
3408 This change should make the sandbox code more portable to less
3409 common Linux architectures. Closes ticket 34382.
3410 - Permit the unlinkat() syscall, which some Libc implementations use
3411 to implement unlink(). Closes ticket 33346.
3413 o Minor bugfix (CI, Windows):
3414 - Use the correct 64-bit printf format when compiling with MINGW on
3415 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3417 o Minor bugfix (onion service v3 client):
3418 - Remove a BUG() warning that could occur naturally. Fixes bug
3419 34087; bugfix on 0.3.2.1-alpha.
3421 o Minor bugfix (SOCKS, onion service client):
3422 - Detect v3 onion service addresses of the wrong length when
3423 returning the F6 ExtendedErrors code. Fixes bug 33873; bugfix
3426 o Minor bugfixes (compiler warnings):
3427 - Fix a compiler warning on platforms with 32-bit time_t values.
3428 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3430 o Minor bugfixes (control port, onion service):
3431 - Consistently use 'address' in "Invalid v3 address" response to
3432 ONION_CLIENT_AUTH commands. Previously, we would sometimes say
3433 'addr'. Fixes bug 40005; bugfix on 0.4.3.1-alpha.
3435 o Minor bugfixes (logging):
3436 - Downgrade a noisy log message that could occur naturally when
3437 receiving an extrainfo document that we no longer want. Fixes bug
3438 16016; bugfix on 0.2.6.3-alpha.
3440 o Minor bugfixes (onion services v3):
3441 - Avoid a non-fatal assertion failure in certain edge-cases when
3442 opening an intro circuit as a client. Fixes bug 34084; bugfix
3445 o Deprecated features (onion service v2):
3446 - Add a deprecation warning for version 2 onion services. Closes
3449 o Removed features (IPv6, revert):
3450 - Revert the change in the default value of ClientPreferIPv6OrPort:
3451 it breaks the torsocks use case. The SOCKS resolve command has no
3452 mechanism to ask for a specific address family (v4 or v6), and so
3453 prioritizing IPv6 when an IPv4 address is requested on the SOCKS
3454 interface resulted in a failure. Tor Browser explicitly sets
3455 PreferIPv6, so this should not affect the majority of our users.
3456 Closes ticket 33796; bugfix on 0.4.4.1-alpha.
3459 Changes in version 0.4.4.1-alpha - 2020-06-16
3460 This is the first alpha release in the 0.4.4.x series. It improves
3461 our guard selection algorithms, improves the amount of code that
3462 can be disabled when running without relay support, and includes numerous
3463 small bugfixes and enhancements. It also lays the ground for some IPv6
3464 features that we'll be developing more in the next (0.4.5) series.
3466 Here are the changes since 0.4.3.5.
3468 o Major features (Proposal 310, performance + security):
3469 - Implements Proposal 310, "Bandaid on guard selection". Proposal
3470 310 solves load-balancing issues with older versions of the guard
3471 selection algorithm, and improves its security. Under this new
3472 algorithm, a newly selected guard never becomes Primary unless all
3473 previously sampled guards are unreachable. Implements
3474 recommendation from 32088. (Proposal 310 is linked to the CLAPS
3475 project researching optimal client location-aware path selections.
3476 This project is a collaboration between the UCLouvain Crypto Group,
3477 the U.S. Naval Research Laboratory, and Princeton University.)
3479 o Major features (IPv6, relay):
3480 - Consider IPv6-only EXTEND2 cells valid on relays. Log a protocol
3481 warning if the IPv4 or IPv6 address is an internal address, and
3482 internal addresses are not allowed. But continue to use the other
3483 address, if it is valid. Closes ticket 33817.
3484 - If a relay can extend over IPv4 and IPv6, and both addresses are
3485 provided, it chooses between them uniformly at random. Closes
3487 - Re-use existing IPv6 connections for circuit extends. Closes
3489 - Relays may extend circuits over IPv6, if the relay has an IPv6
3490 ORPort, and the client supplies the other relay's IPv6 ORPort in
3491 the EXTEND2 cell. IPv6 extends will be used by the relay IPv6
3492 ORPort self-tests in 33222. Closes ticket 33817.
3494 o Major features (v3 onion services):
3495 - Allow v3 onion services to act as OnionBalance backend instances,
3496 by using the HiddenServiceOnionBalanceInstance torrc option.
3497 Closes ticket 32709.
3499 o Minor feature (developer tools):
3500 - Add a script to help check the alphabetical ordering of option
3501 names in the manual page. Closes ticket 33339.
3503 o Minor feature (onion service client, SOCKS5):
3504 - Add 3 new SocksPort ExtendedErrors (F2, F3, F7) that reports back
3505 new type of onion service connection failures. The semantics of
3506 these error codes are documented in proposal 309. Closes
3509 o Minor feature (onion service v3):
3510 - If a service cannot upload its descriptor(s), log why at INFO
3511 level. Closes ticket 33400; bugfix on 0.3.2.1-alpha.
3513 o Minor feature (python scripts):
3514 - Stop assuming that /usr/bin/python exists. Instead of using a
3515 hardcoded path in scripts that still use Python 2, use
3516 /usr/bin/env, similarly to the scripts that use Python 3. Fixes
3517 bug 33192; bugfix on 0.4.2.
3519 o Minor features (client-only compilation):
3520 - Disable more code related to the ext_orport protocol when
3521 compiling without support for relay mode. Closes ticket 33368.
3522 - Disable more of our self-testing code when support for relay mode
3523 is disabled. Closes ticket 33370.
3525 o Minor features (code safety):
3526 - Check for failures of tor_inet_ntop() and tor_inet_ntoa()
3527 functions in DNS and IP address processing code, and adjust
3528 codepaths to make them less likely to crash entire Tor instances.
3529 Resolves issue 33788.
3531 o Minor features (compilation size):
3532 - Most server-side DNS code is now disabled when building without
3533 support for relay mode. Closes ticket 33366.
3535 o Minor features (continuous integration):
3536 - Run unit-test and integration test (Stem, Chutney) jobs with
3537 ALL_BUGS_ARE_FATAL macro being enabled on Travis and Appveyor.
3538 Resolves ticket 32143.
3540 o Minor features (control port):
3541 - Return a descriptive error message from the 'GETINFO status/fresh-
3542 relay-descs' command on the control port. Previously, we returned
3543 a generic error of "Error generating descriptor". Closes ticket
3544 32873. Patch by Neel Chauhan.
3546 o Minor features (developer tooling):
3547 - Refrain from listing all .a files that are generated by the Tor
3548 build in .gitignore. Add a single wildcard *.a entry that covers
3549 all of them for present and future. Closes ticket 33642.
3550 - Add a script ("git-install-tools.sh") to install git hooks and
3551 helper scripts. Closes ticket 33451.
3553 o Minor features (directory authority, shared random):
3554 - Refactor more authority-only parts of the shared-random scheduling
3555 code to reside in the dirauth module, and to be disabled when
3556 compiling with --disable-module-dirauth. Closes ticket 33436.
3558 o Minor features (directory):
3559 - Remember the number of bytes we have downloaded for each directory
3560 purpose while bootstrapping, and while fully bootstrapped. Log
3561 this information as part of the heartbeat message. Closes
3564 o Minor features (IPv6 support):
3565 - Adds IPv6 support to tor_addr_is_valid(). Adds tests for the above
3566 changes and tor_addr_is_null(). Closes ticket 33679. Patch
3568 - Allow clients and relays to send dual-stack and IPv6-only EXTEND2
3569 cells. Parse dual-stack and IPv6-only EXTEND2 cells on relays.
3570 Closes ticket 33901.
3572 o Minor features (logging):
3573 - When trying to find our own address, add debug-level logging to
3574 report the sources of candidate addresses. Closes ticket 32888.
3576 o Minor features (testing, architecture):
3577 - Our test scripts now double-check that subsystem initialization
3578 order is consistent with the inter-module dependencies established
3579 by our .may_include files. Implements ticket 31634.
3580 - Initialize all subsystems at the beginning of our unit test
3581 harness, to avoid crashes due to uninitialized subsystems. Follow-
3582 up from ticket 33316.
3584 o Minor features (v3 onion services):
3585 - Add v3 onion service status to the dumpstats() call which is
3586 triggered by a SIGUSR1 signal. Previously, we only did v2 onion
3587 services. Closes ticket 24844. Patch by Neel Chauhan.
3589 o Minor features (windows):
3590 - Add support for console control signals like Ctrl+C in Windows.
3591 Closes ticket 34211. Patch from Damon Harris (TheDcoder).
3593 o Minor bugfix (onion service v3):
3594 - Prevent an assert() that would occur when cleaning the client
3595 descriptor cache, and attempting to close circuits for a non-
3596 decrypted descriptor (lacking client authorization). Fixes bug
3597 33458; bugfix on 0.4.2.1-alpha.
3599 o Minor bugfix (refactoring):
3600 - Lift circuit_build_times_disabled() out of the
3601 circuit_expire_building() loop, to save CPU time when there are
3602 many circuits open. Fixes bug 33977; bugfix on 0.3.5.9.
3604 o Minor bugfixes (client performance):
3605 - Resume use of preemptively-built circuits when UseEntryGuards is set
3606 to 0. We accidentally disabled this feature with that config
3607 setting, leading to slower load times. Fixes bug 34303; bugfix
3610 o Minor bugfixes (directory authorities):
3611 - Directory authorities now reject votes that arrive too late. In
3612 particular, once an authority has started fetching missing votes,
3613 it no longer accepts new votes posted by other authorities. This
3614 change helps prevent a consensus split, where only some authorities
3615 have the late vote. Fixes bug 4631; bugfix on 0.2.0.5-alpha.
3617 o Minor bugfixes (git scripts):
3618 - Stop executing the checked-out pre-commit hook from the pre-push
3619 hook. Instead, execute the copy in the user's git directory. Fixes
3620 bug 33284; bugfix on 0.4.1.1-alpha.
3622 o Minor bugfixes (initialization):
3623 - Initialize the subsystems in our code in an order more closely
3624 corresponding to their dependencies, so that every system is
3625 initialized before the ones that (theoretically) depend on it.
3626 Fixes bug 33316; bugfix on 0.4.0.1-alpha.
3628 o Minor bugfixes (IPv4, relay):
3629 - Check for invalid zero IPv4 addresses and ports when sending and
3630 receiving extend cells. Fixes bug 33900; bugfix on 0.2.4.8-alpha.
3632 o Minor bugfixes (IPv6, relay):
3633 - Consider IPv6 addresses when checking if a connection is
3634 canonical. In 17604, relays assumed that a remote relay could
3635 consider an IPv6 connection canonical, but did not set the
3636 canonical flag on their side of the connection. Fixes bug 33899;
3637 bugfix on 0.3.1.1-alpha.
3638 - Log IPv6 addresses on connections where this relay is the
3639 responder. Previously, responding relays would replace the remote
3640 IPv6 address with the IPv4 address from the consensus. Fixes bug
3641 33899; bugfix on 0.3.1.1-alpha.
3643 o Minor bugfixes (linux seccomp sandbox nss):
3644 - Fix a startup crash when tor is compiled with --enable-nss and
3645 sandbox support is enabled. Fixes bug 34130; bugfix on
3646 0.3.5.1-alpha. Patch by Daniel Pinto.
3648 o Minor bugfixes (logging, testing):
3649 - Make all of tor's assertion macros support the ALL_BUGS_ARE_FATAL
3650 and DISABLE_ASSERTS_IN_UNIT_TESTS debugging modes. (IF_BUG_ONCE()
3651 used to log a non-fatal warning, regardless of the debugging
3652 mode.) Fixes bug 33917; bugfix on 0.2.9.1-alpha.
3654 o Minor bugfixes (logs):
3655 - Remove surprising empty line in the INFO-level log about circuit
3656 build timeout. Fixes bug 33531; bugfix on 0.3.3.1-alpha.
3658 o Minor bugfixes (mainloop):
3659 - Better guard against growing a buffer past its maximum 2GB in
3660 size. Fixes bug 33131; bugfix on 0.3.0.4-rc.
3662 o Minor bugfixes (manual page):
3663 - Update the man page to reflect that MinUptimeHidServDirectoryV2
3664 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
3666 o Minor bugfixes (onion service v3, client):
3667 - Remove a BUG() that was causing a stacktrace when a descriptor
3668 changed at an unexpected time. Fixes bug 28992; bugfix
3671 o Minor bugfixes (onion service, logging):
3672 - Fix a typo in a log message PublishHidServDescriptors is set to 0.
3673 Fixes bug 33779; bugfix on 0.3.2.1-alpha.
3675 o Minor bugfixes (portability):
3676 - Fix a portability error in the configure script, where we were
3677 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
3679 o Minor bugfixes (protocol versions):
3680 - Sort tor's supported protocol version lists, as recommended by the
3681 tor directory specification. Fixes bug 33285; bugfix
3684 o Minor bugfixes (relays):
3685 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
3686 descriptors, when the IPv6 port was configured as "auto". Fixes
3687 bug 32588; bugfix on 0.2.3.9-alpha.
3689 o Code simplification and refactoring:
3690 - Define and use a new constant TOR_ADDRPORT_BUF_LEN which is like
3691 TOR_ADDR_BUF_LEN but includes enough space for an IP address,
3692 brackets, separating colon, and port number. Closes ticket 33956.
3693 Patch by Neel Chauhan.
3694 - Merge the orconn and ocirc events into the "core" subsystem, which
3695 manages or connections and origin circuits. Previously they were
3696 isolated in subsystems of their own.
3697 - Move LOG_PROTOCOL_WARN to app/config. Resolves a dependency
3698 inversion. Closes ticket 33633.
3699 - Move the circuit extend code to the relay module. Split the
3700 circuit extend function into smaller functions. Closes
3702 - Rewrite port_parse_config() to use the default port flags from
3703 port_cfg_new(). Closes ticket 32994. Patch by MrSquanchee.
3704 - Updated comments in 'scheduler.c' to reflect old code changes, and
3705 simplified the scheduler channel state change code. Closes
3709 - Document the limitations of using %include on config files with
3710 seccomp sandbox enabled. Fixes documentation bug 34133; bugfix on
3711 0.3.1.1-alpha. Patch by Daniel Pinto.
3712 - Fix several doxygen warnings related to imbalanced groups. Closes
3716 - Remove the ClientAutoIPv6ORPort option. This option attempted to
3717 randomly choose between IPv4 and IPv6 for client connections, and
3718 wasn't a true implementation of Happy Eyeballs. Often, this option
3719 failed on IPv4-only or IPv6-only connections. Closes ticket 32905.
3720 Patch by Neel Chauhan.
3721 - Stop shipping contrib/dist/rc.subr file, as it is not being used
3722 on FreeBSD anymore. Closes issue 31576.
3725 - Add a basic IPv6 test to "make test-network". This test only runs
3726 when the local machine has an IPv6 stack. Closes ticket 33300.
3727 - Add test-network-ipv4 and test-network-ipv6 jobs to the Makefile.
3728 These jobs run the IPv4-only and dual-stack chutney flavours from
3729 test-network-all. Closes ticket 33280.
3730 - Remove a redundant distcheck job. Closes ticket 33194.
3731 - Run the test-network-ipv6 Makefile target in the Travis CI IPv6
3732 chutney job. This job runs on macOS, so it's a bit slow. Closes
3734 - Sort the Travis jobs in order of speed. Putting the slowest jobs
3735 first takes full advantage of Travis job concurrency. Closes
3737 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
3738 previously configured to fast_finish (which requires
3739 allow_failure), to speed up the build. Closes ticket 33195.
3740 - Test v3 onion services to tor's mixed IPv4 chutney network. And
3741 add a mixed IPv6 chutney network. These networks are used in the
3742 test-network-all, test-network-ipv4, and test-network-ipv6 make
3743 targets. Closes ticket 33334.
3744 - Use the "bridges+hs-v23" chutney network flavour in "make test-
3745 network". This test requires a recent version of chutney (mid-
3746 February 2020). Closes ticket 28208.
3747 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
3748 tool to produce detailed diagnostic output. Closes ticket 32792.
3750 o Code simplification and refactoring (onion service):
3751 - Refactor configuration parsing to use the new config subsystem
3752 code. Closes ticket 33014.
3754 o Code simplification and refactoring (relay address):
3755 - Move a series of functions related to address resolving into their
3756 own files. Closes ticket 33789.
3758 o Documentation (manual page):
3759 - Add cross reference links and a table of contents to the HTML tor
3760 manual page. Closes ticket 33369. Work by Swati Thacker as part of
3761 Google Season of Docs.
3762 - Alphabetize the Denial of Service Mitigation Options, Directory
3763 Authority Server Options, Hidden Service Options, and Testing
3764 Network Options sections of the tor(1) manual page. Closes ticket
3765 33275. Work by Swati Thacker as part of Google Season of Docs.
3766 - Refrain from mentioning nicknames in manpage section for MyFamily
3767 torrc option. Resolves issue 33417.
3768 - Updated the options set by TestingTorNetwork in the manual page.
3769 Closes ticket 33778.
3772 Changes in version 0.4.3.5 - 2020-05-15
3773 Tor 0.4.3.5 is the first stable release in the 0.4.3.x series. This
3774 series adds support for building without relay code enabled, and
3775 implements functionality needed for OnionBalance with v3 onion
3776 services. It includes significant refactoring of our configuration and
3777 controller functionality, and fixes numerous smaller bugs and
3780 Per our support policy, we support each stable release series for nine
3781 months after its first stable release, or three months after the first
3782 stable release of the next series: whichever is longer. This means
3783 that 0.4.3.x will be supported until around February 2021--later, if
3784 0.4.4.x is later than anticipated.
3786 Note also that support for 0.4.1.x is about to end on May 20 of this
3787 year; 0.4.2.x will be supported until September 15. We still plan to
3788 continue supporting 0.3.5.x, our long-term stable series, until
3791 Below are the changes since 0.4.3.4-rc. For a complete list of changes
3792 since 0.4.2.6, see the ReleaseNotes file.
3794 o Minor bugfixes (compiler compatibility):
3795 - Avoid compiler warnings from Clang 10 related to the use of GCC-
3796 style "/* falls through */" comments. Both Clang and GCC allow
3797 __attribute__((fallthrough)) instead, so that's what we're using
3798 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
3799 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
3802 o Minor bugfixes (logging):
3803 - Stop truncating IPv6 addresses and ports in channel and connection
3804 logs. Fixes bug 33918; bugfix on 0.2.4.4-alpha.
3805 - Fix a logic error in a log message about whether an address was
3806 invalid. Previously, the code would never report that onion
3807 addresses were onion addresses. Fixes bug 34131; bugfix
3811 Changes in version 0.4.3.4-rc - 2020-04-13
3812 Tor 0.4.3.4-rc is the first release candidate in its series. It fixes
3813 several bugs from earlier versions, including one affecting DoS
3814 defenses on bridges using pluggable transports.
3816 o Major bugfixes (DoS defenses, bridges, pluggable transport):
3817 - Fix a bug that was preventing DoS defenses from running on bridges
3818 with a pluggable transport. Previously, the DoS subsystem was not
3819 given the transport name of the client connection, thus failed to
3820 find the GeoIP cache entry for that client address. Fixes bug
3821 33491; bugfix on 0.3.3.2-alpha.
3823 o Minor feature (sendme, flow control):
3824 - Default to sending SENDME version 1 cells. (Clients are already
3825 sending these, because of a consensus parameter telling them to do
3826 so: this change only affects what clients would do if the
3827 consensus didn't contain a recommendation.) Closes ticket 33623.
3829 o Minor features (testing):
3830 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
3831 variable to specify a list of space-separated test cases that
3832 should not be executed. We will use this to disable certain tests
3833 that are failing on Appveyor because of mismatched OpenSSL
3834 libraries. Part of ticket 33643.
3836 o Minor bugfixes (--disable-module-relay):
3837 - Fix an assertion failure when Tor is built without the relay
3838 module, and then invoked with the "User" option. Fixes bug 33668;
3839 bugfix on 0.4.3.1-alpha.
3841 o Minor bugfixes (--disable-module-relay,--disable-module-dirauth):
3842 - Set some output arguments in the relay and dirauth module stubs,
3843 to guard against future stub argument handling bugs like 33668.
3844 Fixes bug 33674; bugfix on 0.4.3.1-alpha.
3846 o Minor bugfixes (build system):
3847 - Correctly output the enabled module in the configure summary.
3848 Before that, the list shown was just plain wrong. Fixes bug 33646;
3849 bugfix on 0.4.3.2-alpha.
3851 o Minor bugfixes (client, IPv6):
3852 - Stop forcing all non-SocksPorts to prefer IPv6 exit connections.
3853 Instead, prefer IPv6 connections by default, but allow users to
3854 change their configs using the "NoPreferIPv6" port flag. Fixes bug
3855 33608; bugfix on 0.4.3.1-alpha.
3856 - Revert PreferIPv6 set by default on the SocksPort because it broke
3857 the torsocks use case. Tor doesn't have a way for an application
3858 to request the hostname to be resolved for a specific IP version,
3859 but torsocks requires that. Up until now, IPv4 was used by default
3860 so torsocks is expecting that, and can't handle a possible IPv6
3861 being returned. Fixes bug 33804; bugfix on 0.4.3.1-alpha.
3863 o Minor bugfixes (key portability):
3864 - When reading PEM-encoded key data, tolerate CRLF line-endings even
3865 if we are not running on Windows. Previously, non-Windows hosts
3866 would reject these line-endings in certain positions, making
3867 certain key files hard to move from one host to another. Fixes bug
3868 33032; bugfix on 0.3.5.1-alpha.
3870 o Minor bugfixes (logging):
3871 - Flush stderr, stdout, and file logs during shutdown, if supported
3872 by the OS. This change helps make sure that any final logs are
3873 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
3874 - Stop closing stderr and stdout during shutdown. Closing these file
3875 descriptors can hide sanitiser logs. Fixes bug 33087; bugfix
3878 o Minor bugfixes (onion services v3):
3879 - Relax severity of a log message that can appear naturally when
3880 decoding onion service descriptors as a relay. Also add some
3881 diagnostics to debug any future bugs in that area. Fixes bug
3882 31669; bugfix on 0.3.0.1-alpha.
3883 - Block a client-side assertion by disallowing the registration of
3884 an x25519 client auth key that's all zeroes. Fixes bug 33545;
3885 bugfix on 0.4.3.1-alpha. Based on patch from "cypherpunks".
3887 o Code simplification and refactoring:
3888 - Disable our coding standards best practices tracker in our git
3889 hooks. (0.4.3 branches only.) Closes ticket 33678.
3892 - Avoid conflicts between the fake sockets in tor's unit tests, and
3893 real file descriptors. Resolves issues running unit tests with
3894 GitHub Actions, where the process that embeds or launches the
3895 tests has already opened a large number of file descriptors. Fixes
3896 bug 33782; bugfix on 0.2.8.1-alpha. Found and fixed by
3900 - In our Appveyor Windows CI, copy required DLLs to test and app
3901 directories, before running tor's tests. This ensures that tor.exe
3902 and test*.exe use the correct version of each DLL. This fix is not
3903 required, but we hope it will avoid DLL search issues in future.
3904 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
3905 - On Appveyor, skip the crypto/openssl_version test, which is
3906 failing because of a mismatched library installation. Fix
3910 Changes in version 0.4.3.3-alpha - 2020-03-18
3911 Tor 0.4.3.3-alpha fixes several bugs in previous releases, including
3912 TROVE-2020-002, a major denial-of-service vulnerability that affected
3913 all released Tor instances since 0.2.1.5-alpha. Using this
3914 vulnerability, an attacker could cause Tor instances to consume a huge
3915 amount of CPU, disrupting their operations for several seconds or
3916 minutes. This attack could be launched by anybody against a relay, or
3917 by a directory cache against any client that had connected to it. The
3918 attacker could launch this attack as much as they wanted, thereby
3919 disrupting service or creating patterns that could aid in traffic
3920 analysis. This issue was found by OSS-Fuzz, and is also tracked
3923 We do not have reason to believe that this attack is currently being
3924 exploited in the wild, but nonetheless we advise everyone to upgrade
3925 as soon as packages are available.
3927 o Major bugfixes (security, denial-of-service):
3928 - Fix a denial-of-service bug that could be used by anyone to
3929 consume a bunch of CPU on any Tor relay or authority, or by
3930 directories to consume a bunch of CPU on clients or hidden
3931 services. Because of the potential for CPU consumption to
3932 introduce observable timing patterns, we are treating this as a
3933 high-severity security issue. Fixes bug 33119; bugfix on
3934 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
3935 as TROVE-2020-002 and CVE-2020-10592.
3937 o Major bugfixes (circuit padding, memory leak):
3938 - Avoid a remotely triggered memory leak in the case that a circuit
3939 padding machine is somehow negotiated twice on the same circuit.
3940 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
3941 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
3943 o Major bugfixes (directory authority):
3944 - Directory authorities will now send a 503 (not enough bandwidth)
3945 code to clients when under bandwidth pressure. Known relays and
3946 other authorities will always be answered regardless of the
3947 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
3949 o Minor features (diagnostic):
3950 - Improve assertions and add some memory-poisoning code to try to
3951 track down possible causes of a rare crash (32564) in the EWMA
3952 code. Closes ticket 33290.
3954 o Minor features (directory authorities):
3955 - Directory authorities now reject descriptors from relays running
3956 Tor versions from the 0.2.9 and 0.4.0 series. The 0.3.5 series is
3957 still allowed. Resolves ticket 32672. Patch by Neel Chauhan.
3959 o Minor features (usability):
3960 - Include more information when failing to parse a configuration
3961 value. This should make it easier to tell what's going wrong when
3962 a configuration file doesn't parse. Closes ticket 33460.
3964 o Minor bugfix (relay, configuration):
3965 - Warn if the ContactInfo field is not set, and tell the relay
3966 operator that not having a ContactInfo field set might cause their
3967 relay to get rejected in the future. Fixes bug 33361; bugfix
3970 o Minor bugfixes (coding best practices checks):
3971 - Allow the "practracker" script to read unicode files when using
3972 Python 2. We made the script use unicode literals in 0.4.3.1-alpha,
3973 but didn't change the codec for opening files. Fixes bug 33374;
3974 bugfix on 0.4.3.1-alpha.
3976 o Minor bugfixes (continuous integration):
3977 - Remove the buggy and unused mirroring job. Fixes bug 33213; bugfix
3980 o Minor bugfixes (onion service v3, client):
3981 - Remove a BUG() warning that would cause a stack trace if an onion
3982 service descriptor was freed while we were waiting for a
3983 rendezvous circuit to complete. Fixes bug 28992; bugfix
3986 o Minor bugfixes (onion services v3):
3987 - Fix an assertion failure that could result from a corrupted
3988 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
3989 bugfix on 0.3.3.1-alpha. This issue is also tracked
3992 o Documentation (manpage):
3993 - Alphabetize the Server and Directory server sections of the tor
3994 manpage. Also split Statistics options into their own section of
3995 the manpage. Closes ticket 33188. Work by Swati Thacker as part of
3996 Google Season of Docs.
3997 - Document the __OwningControllerProcess torrc option and specify
3998 its polling interval. Resolves issue 32971.
4000 o Testing (Travis CI):
4001 - Remove a redundant distcheck job. Closes ticket 33194.
4002 - Sort the Travis jobs in order of speed: putting the slowest jobs
4003 first takes full advantage of Travis job concurrency. Closes
4005 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4006 previously configured to fast_finish (which requires
4007 allow_failure), to speed up the build. Closes ticket 33195.
4008 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4009 tool to produce detailed diagnostic output. Closes ticket 32792.
4012 Changes in version 0.4.2.7 - 2020-03-18
4013 This is the third stable release in the 0.4.2.x series. It backports
4014 numerous fixes from later releases, including a fix for TROVE-2020-
4015 002, a major denial-of-service vulnerability that affected all
4016 released Tor instances since 0.2.1.5-alpha. Using this vulnerability,
4017 an attacker could cause Tor instances to consume a huge amount of CPU,
4018 disrupting their operations for several seconds or minutes. This
4019 attack could be launched by anybody against a relay, or by a directory
4020 cache against any client that had connected to it. The attacker could
4021 launch this attack as much as they wanted, thereby disrupting service
4022 or creating patterns that could aid in traffic analysis. This issue
4023 was found by OSS-Fuzz, and is also tracked as CVE-2020-10592.
4025 We do not have reason to believe that this attack is currently being
4026 exploited in the wild, but nonetheless we advise everyone to upgrade
4027 as soon as packages are available.
4029 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
4030 - Fix a denial-of-service bug that could be used by anyone to
4031 consume a bunch of CPU on any Tor relay or authority, or by
4032 directories to consume a bunch of CPU on clients or hidden
4033 services. Because of the potential for CPU consumption to
4034 introduce observable timing patterns, we are treating this as a
4035 high-severity security issue. Fixes bug 33119; bugfix on
4036 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
4037 as TROVE-2020-002 and CVE-2020-10592.
4039 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
4040 - Avoid a remotely triggered memory leak in the case that a circuit
4041 padding machine is somehow negotiated twice on the same circuit.
4042 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
4043 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
4045 o Major bugfixes (directory authority, backport from 0.4.3.3-alpha):
4046 - Directory authorities will now send a 503 (not enough bandwidth)
4047 code to clients when under bandwidth pressure. Known relays and
4048 other authorities will always be answered regardless of the
4049 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
4051 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
4052 - Stop allowing failures on the Travis CI stem tests job. It looks
4053 like all the stem hangs we were seeing before are now fixed.
4054 Closes ticket 33075.
4056 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
4057 - Lowercase the configured value of BridgeDistribution before adding
4058 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4060 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
4061 - If we encounter a bug when flushing a buffer to a TLS connection,
4062 only log the bug once per invocation of the Tor process.
4063 Previously we would log with every occurrence, which could cause
4064 us to run out of disk space. Fixes bug 33093; bugfix
4067 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
4068 - Fix an assertion failure that could result from a corrupted
4069 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
4070 bugfix on 0.3.3.1-alpha. This issue is also tracked
4073 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
4074 - Fix a syntax warning given by newer versions of Rust that was
4075 creating problems for our continuous integration. Fixes bug 33212;
4076 bugfix on 0.3.5.1-alpha.
4078 o Testing (Travis CI, backport from 0.4.3.3-alpha):
4079 - Remove a redundant distcheck job. Closes ticket 33194.
4080 - Sort the Travis jobs in order of speed: putting the slowest jobs
4081 first takes full advantage of Travis job concurrency. Closes
4083 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4084 previously configured to fast_finish (which requires
4085 allow_failure), to speed up the build. Closes ticket 33195.
4086 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4087 tool to produce detailed diagnostic output. Closes ticket 32792.
4090 Changes in version 0.4.1.9 - 2020-03-18
4091 Tor 0.4.1.9 backports important fixes from later Tor releases,
4092 including a fix for TROVE-2020-002, a major denial-of-service
4093 vulnerability that affected all released Tor instances since
4094 0.2.1.5-alpha. Using this vulnerability, an attacker could cause Tor
4095 instances to consume a huge amount of CPU, disrupting their operations
4096 for several seconds or minutes. This attack could be launched by
4097 anybody against a relay, or by a directory cache against any client
4098 that had connected to it. The attacker could launch this attack as
4099 much as they wanted, thereby disrupting service or creating patterns
4100 that could aid in traffic analysis. This issue was found by OSS-Fuzz,
4101 and is also tracked as CVE-2020-10592.
4103 We do not have reason to believe that this attack is currently being
4104 exploited in the wild, but nonetheless we advise everyone to upgrade
4105 as soon as packages are available.
4107 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
4108 - Fix a denial-of-service bug that could be used by anyone to
4109 consume a bunch of CPU on any Tor relay or authority, or by
4110 directories to consume a bunch of CPU on clients or hidden
4111 services. Because of the potential for CPU consumption to
4112 introduce observable timing patterns, we are treating this as a
4113 high-severity security issue. Fixes bug 33119; bugfix on
4114 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
4115 as TROVE-2020-002 and CVE-2020-10592.
4117 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
4118 - Avoid a remotely triggered memory leak in the case that a circuit
4119 padding machine is somehow negotiated twice on the same circuit.
4120 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
4121 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
4123 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
4124 - Lowercase the configured value of BridgeDistribution before adding
4125 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4127 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
4128 - If we encounter a bug when flushing a buffer to a TLS connection,
4129 only log the bug once per invocation of the Tor process.
4130 Previously we would log with every occurrence, which could cause
4131 us to run out of disk space. Fixes bug 33093; bugfix
4134 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
4135 - Fix an assertion failure that could result from a corrupted
4136 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
4137 bugfix on 0.3.3.1-alpha. This issue is also tracked
4140 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
4141 - Fix a syntax warning given by newer versions of Rust that was
4142 creating problems for our continuous integration. Fixes bug 33212;
4143 bugfix on 0.3.5.1-alpha.
4145 o Testing (Travis CI, backport from 0.4.3.3-alpha):
4146 - Remove a redundant distcheck job. Closes ticket 33194.
4147 - Sort the Travis jobs in order of speed: putting the slowest jobs
4148 first takes full advantage of Travis job concurrency. Closes
4150 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4151 previously configured to fast_finish (which requires
4152 allow_failure), to speed up the build. Closes ticket 33195.
4153 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4154 tool to produce detailed diagnostic output. Closes ticket 32792.
4157 Changes in version 0.3.5.10 - 2020-03-18
4158 Tor 0.3.5.10 backports many fixes from later Tor releases, including a
4159 fix for TROVE-2020-002, a major denial-of-service vulnerability that
4160 affected all released Tor instances since 0.2.1.5-alpha. Using this
4161 vulnerability, an attacker could cause Tor instances to consume a huge
4162 amount of CPU, disrupting their operations for several seconds or
4163 minutes. This attack could be launched by anybody against a relay, or
4164 by a directory cache against any client that had connected to it. The
4165 attacker could launch this attack as much as they wanted, thereby
4166 disrupting service or creating patterns that could aid in traffic
4167 analysis. This issue was found by OSS-Fuzz, and is also tracked
4170 We do not have reason to believe that this attack is currently being
4171 exploited in the wild, but nonetheless we advise everyone to upgrade
4172 as soon as packages are available.
4174 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
4175 - Fix a denial-of-service bug that could be used by anyone to
4176 consume a bunch of CPU on any Tor relay or authority, or by
4177 directories to consume a bunch of CPU on clients or hidden
4178 services. Because of the potential for CPU consumption to
4179 introduce observable timing patterns, we are treating this as a
4180 high-severity security issue. Fixes bug 33119; bugfix on
4181 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
4182 as TROVE-2020-002 and CVE-2020-10592.
4184 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
4185 - Correct how we use libseccomp. Particularly, stop assuming that
4186 rules are applied in a particular order or that more rules are
4187 processed after the first match. Neither is the case! In
4188 libseccomp <2.4.0 this lead to some rules having no effect.
4189 libseccomp 2.4.0 changed how rules are generated, leading to a
4190 different ordering, which in turn led to a fatal crash during
4191 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4194 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
4195 - Stop allowing failures on the Travis CI stem tests job. It looks
4196 like all the stem hangs we were seeing before are now fixed.
4197 Closes ticket 33075.
4199 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
4200 - Lowercase the configured value of BridgeDistribution before adding
4201 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4203 o Minor bugfixes (crash, backport from 0.4.2.4-rc):
4204 - When running Tor with an option like --verify-config or
4205 --dump-config that does not start the event loop, avoid crashing
4206 if we try to exit early because of an error. Fixes bug 32407;
4207 bugfix on 0.3.3.1-alpha.
4209 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
4210 - If we encounter a bug when flushing a buffer to a TLS connection,
4211 only log the bug once per invocation of the Tor process.
4212 Previously we would log with every occurrence, which could cause
4213 us to run out of disk space. Fixes bug 33093; bugfix
4216 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
4217 - Fix an assertion failure that could result from a corrupted
4218 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
4219 bugfix on 0.3.3.1-alpha. This issue is also tracked
4222 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
4223 - Fix a syntax warning given by newer versions of Rust that was
4224 creating problems for our continuous integration. Fixes bug 33212;
4225 bugfix on 0.3.5.1-alpha.
4227 o Testing (backport from 0.4.3.1-alpha):
4228 - Re-enable the Travis CI macOS Chutney build, but don't let it
4229 prevent the Travis job from finishing. (The Travis macOS jobs are
4230 slow, so we don't want to have it delay the whole CI process.)
4231 Closes ticket 32629.
4232 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4233 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4234 fix the sandbox errors in 32722. Closes ticket 32240.
4236 o Testing (continuous integration, backport from 0.4.3.1-alpha):
4237 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4239 o Testing (Travis CI, backport from 0.4.3.3-alpha):
4240 - Remove a redundant distcheck job. Closes ticket 33194.
4241 - Sort the Travis jobs in order of speed: putting the slowest jobs
4242 first takes full advantage of Travis job concurrency. Closes
4244 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4245 previously configured to fast_finish (which requires
4246 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4247 tool to produce detailed diagnostic output. Closes ticket 32792.
4250 Changes in version 0.4.3.2-alpha - 2020-02-10
4251 This is the second stable alpha release in the Tor 0.4.3.x series. It
4252 fixes several bugs present in the previous alpha release. Anybody
4253 running the previous alpha should upgrade, and look for bugs in this
4256 o Major bugfixes (onion service client, authorization):
4257 - On a NEWNYM signal, purge entries from the ephemeral client
4258 authorization cache. The permanent ones are kept. Fixes bug 33139;
4259 bugfix on 0.4.3.1-alpha.
4261 o Minor features (best practices tracker):
4262 - Practracker now supports a --regen-overbroad option to regenerate
4263 the exceptions file, but only to revise exceptions to be _less_
4264 tolerant of best-practices violations. Closes ticket 32372.
4266 o Minor features (continuous integration):
4267 - Run Doxygen Makefile target on Travis, so we can learn about
4268 regressions in our internal documentation. Closes ticket 32455.
4269 - Stop allowing failures on the Travis CI stem tests job. It looks
4270 like all the stem hangs we were seeing before are now fixed.
4271 Closes ticket 33075.
4273 o Minor bugfixes (build system):
4274 - Revise configure options that were either missing or incorrect in
4275 the configure summary. Fixes bug 32230; bugfix on 0.4.3.1-alpha.
4277 o Minor bugfixes (controller protocol):
4278 - Fix a memory leak introduced by refactoring of control reply
4279 formatting code. Fixes bug 33039; bugfix on 0.4.3.1-alpha.
4280 - Fix a memory leak in GETINFO responses. Fixes bug 33103; bugfix
4282 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
4283 report them as SIGNAL events. Previously we would log a bug
4284 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
4286 o Minor bugfixes (logging):
4287 - If we encounter a bug when flushing a buffer to a TLS connection,
4288 only log the bug once per invocation of the Tor process.
4289 Previously we would log with every occurrence, which could cause
4290 us to run out of disk space. Fixes bug 33093; bugfix
4292 - When logging a bug, do not say "Future instances of this warning
4293 will be silenced" unless we are actually going to silence them.
4294 Previously we would say this whenever a BUG() check failed in the
4295 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
4297 o Minor bugfixes (onion service v2):
4298 - Move a series of v2 onion service warnings to protocol-warning
4299 level because they can all be triggered remotely by a malformed
4300 request. Fixes bug 32706; bugfix on 0.1.1.14-alpha.
4302 o Minor bugfixes (onion service v3, client authorization):
4303 - When removing client authorization credentials using the control
4304 port, also remove the associated descriptor, so the onion service
4305 can no longer be contacted. Fixes bug 33148; bugfix
4308 o Minor bugfixes (pluggable transports):
4309 - When receiving a message on standard error from a pluggable
4310 transport, log it at info level, rather than as a warning. Fixes
4311 bug 33005; bugfix on 0.4.0.1-alpha.
4313 o Minor bugfixes (rust, build):
4314 - Fix a syntax warning given by newer versions of Rust that was
4315 creating problems for our continuous integration. Fixes bug 33212;
4316 bugfix on 0.3.5.1-alpha.
4318 o Minor bugfixes (TLS bug handling):
4319 - When encountering a bug in buf_read_from_tls(), return a "MISC"
4320 error code rather than "WANTWRITE". This change might help avoid
4321 some CPU-wasting loops if the bug is ever triggered. Bug reported
4322 by opara. Fixes bug 32673; bugfix on 0.3.0.4-alpha.
4324 o Code simplification and refactoring (mainloop):
4325 - Simplify the ip_address_changed() function by removing redundant
4326 checks. Closes ticket 33091.
4328 o Documentation (manpage):
4329 - Split "Circuit Timeout" options and "Node Selection" options into
4330 their own sections of the tor manpage. Closes tickets 32928 and
4331 32929. Work by Swati Thacker as part of Google Season of Docs.
4334 Changes in version 0.4.2.6 - 2020-01-30
4335 This is the second stable release in the 0.4.2.x series. It backports
4336 several bugfixes from 0.4.3.1-alpha, including some that had affected
4337 the Linux seccomp2 sandbox or Windows services. If you're running with
4338 one of those configurations, you'll probably want to upgrade;
4339 otherwise, you should be fine with 0.4.2.5.
4341 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
4342 - Correct how we use libseccomp. Particularly, stop assuming that
4343 rules are applied in a particular order or that more rules are
4344 processed after the first match. Neither is the case! In
4345 libseccomp <2.4.0 this led to some rules having no effect.
4346 libseccomp 2.4.0 changed how rules are generated, leading to a
4347 different ordering, which in turn led to a fatal crash during
4348 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4350 - Fix crash when reloading logging configuration while the
4351 experimental sandbox is enabled. Fixes bug 32841; bugfix on
4352 0.4.1.7. Patch by Peter Gerber.
4354 o Minor bugfixes (correctness checks, backport from 0.4.3.1-alpha):
4355 - Use GCC/Clang's printf-checking feature to make sure that
4356 tor_assertf() arguments are correctly typed. Fixes bug 32765;
4357 bugfix on 0.4.1.1-alpha.
4359 o Minor bugfixes (logging, crash, backport from 0.4.3.1-alpha):
4360 - Avoid a possible crash when trying to log a (fatal) assertion
4361 failure about mismatched magic numbers in configuration objects.
4362 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
4364 o Minor bugfixes (testing, backport from 0.4.3.1-alpha):
4365 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
4366 test_practracker.sh script. Doing so caused a test failure. Fixes
4367 bug 32705; bugfix on 0.4.2.1-alpha.
4368 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
4369 skipping practracker checks. Fixes bug 32705; bugfix
4372 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
4373 - Initialize the publish/subscribe system when running as a windows
4374 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
4376 o Testing (backport from 0.4.3.1-alpha):
4377 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4378 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4379 fix the sandbox errors in 32722. Closes ticket 32240.
4380 - Re-enable the Travis CI macOS Chutney build, but don't let it
4381 prevent the Travis job from finishing. (The Travis macOS jobs are
4382 slow, so we don't want to have it delay the whole CI process.)
4383 Closes ticket 32629.
4385 o Testing (continuous integration, backport from 0.4.3.1-alpha):
4386 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4389 Changes in version 0.4.1.8 - 2020-01-30
4390 This release backports several bugfixes from later release series,
4391 including some that had affected the Linux seccomp2 sandbox or Windows
4392 services. If you're running with one of those configurations, you'll
4393 probably want to upgrade; otherwise, you should be fine with your
4394 current version of 0.4.1.x.
4396 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
4397 - Correct how we use libseccomp. Particularly, stop assuming that
4398 rules are applied in a particular order or that more rules are
4399 processed after the first match. Neither is the case! In
4400 libseccomp <2.4.0 this led to some rules having no effect.
4401 libseccomp 2.4.0 changed how rules are generated, leading to a
4402 different ordering, which in turn led to a fatal crash during
4403 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4405 - Fix crash when reloading logging configuration while the
4406 experimental sandbox is enabled. Fixes bug 32841; bugfix on
4407 0.4.1.7. Patch by Peter Gerber.
4409 o Minor bugfixes (crash, backport form 0.4.2.4-rc):
4410 - When running Tor with an option like --verify-config or
4411 --dump-config that does not start the event loop, avoid crashing
4412 if we try to exit early because of an error. Fixes bug 32407;
4413 bugfix on 0.3.3.1-alpha.
4415 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
4416 - Initialize the publish/subscribe system when running as a windows
4417 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
4419 o Testing (backport from 0.4.3.1-alpha):
4420 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4421 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4422 fix the sandbox errors in 32722. Closes ticket 32240.
4423 - Re-enable the Travis CI macOS Chutney build, but don't let it
4424 prevent the Travis job from finishing. (The Travis macOS jobs are
4425 slow, so we don't want to have it delay the whole CI process.)
4426 Closes ticket 32629.
4428 o Testing (continuous integration, backport from 0.4.3.1-alpha):
4429 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4432 Changes in version 0.4.3.1-alpha - 2020-01-22
4433 This is the first alpha release in the 0.4.3.x series. It includes
4434 improved support for application integration of onion services, support
4435 for building in a client-only mode, and newly improved internal
4436 documentation (online at https://src-ref.docs.torproject.org/tor/). It
4437 also has numerous other small bugfixes and features, as well as
4438 improvements to our code's internal organization that should help us
4439 write better code in the future.
4441 o New system requirements:
4442 - When building Tor, you now need to have Python 3 in order to run
4443 the integration tests. (Python 2 is officially unsupported
4444 upstream, as of 1 Jan 2020.) Closes ticket 32608.
4446 o Major features (build system):
4447 - The relay code can now be disabled using the --disable-module-relay
4448 configure option. When this option is set, we also disable the
4449 dirauth module. Closes ticket 32123.
4450 - When Tor is compiled --disable-module-relay, we also omit the code
4451 used to act as a directory cache. Closes ticket 32487.
4453 o Major features (directory authority, ed25519):
4454 - Add support for banning a relay's ed25519 keys in the approved-
4455 routers file. This will help us migrate away from RSA keys in the
4456 future. Previously, only RSA keys could be banned in approved-
4457 routers. Resolves ticket 22029. Patch by Neel Chauhan.
4459 o Major features (onion service, controller):
4460 - New control port commands to manage client-side onion service
4461 authorization credentials. The ONION_CLIENT_AUTH_ADD command adds
4462 a credential, ONION_CLIENT_AUTH_REMOVE deletes a credential, and
4463 ONION_CLIENT_AUTH_VIEW lists the credentials. Closes ticket 30381.
4465 o Major features (onion service, SOCKS5):
4466 - Introduce a new SocksPort flag, ExtendedErrors, to support more
4467 detailed error codes in information for applications that support
4468 them. Closes ticket 30382; implements proposal 304.
4470 o Major features (proxy):
4471 - In addition to its current supported proxy types (HTTP CONNECT,
4472 SOCKS4, and SOCKS5), Tor can now make its OR connections through a
4473 HAProxy server. A new torrc option was added to specify the
4474 address/port of the server: TCPProxy <protocol> <host>:<port>.
4475 Currently the only supported protocol for the option is haproxy.
4476 Closes ticket 31518. Patch done by Suphanat Chunhapanya (haxxpop).
4478 o Major bugfixes (linux seccomp sandbox):
4479 - Correct how we use libseccomp. Particularly, stop assuming that
4480 rules are applied in a particular order or that more rules are
4481 processed after the first match. Neither is the case! In
4482 libseccomp <2.4.0 this led to some rules having no effect.
4483 libseccomp 2.4.0 changed how rules are generated, leading to a
4484 different ordering, which in turn led to a fatal crash during
4485 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4487 - Fix crash when reloading logging configuration while the
4488 experimental sandbox is enabled. Fixes bug 32841; bugfix on
4489 0.4.1.7. Patch by Peter Gerber.
4491 o Major bugfixes (networking):
4492 - Correctly handle IPv6 addresses in SOCKS5 RESOLVE_PTR requests,
4493 and accept strings as well as binary addresses. Fixes bug 32315;
4494 bugfix on 0.3.5.1-alpha.
4496 o Major bugfixes (onion service):
4497 - Report HS circuit failure back into the HS subsystem so we take
4498 appropriate action with regards to the client introduction point
4499 failure cache. This improves reachability of onion services, since
4500 now clients notice failing introduction circuits properly. Fixes
4501 bug 32020; bugfix on 0.3.2.1-alpha.
4503 o Minor feature (configure, build system):
4504 - Output a list of enabled/disabled features at the end of the
4505 configure process in a pleasing way. Closes ticket 31373.
4507 o Minor feature (heartbeat, onion service):
4508 - Add the DoS INTRODUCE2 defenses counter to the heartbeat DoS
4509 message. Closes ticket 31371.
4511 o Minor features (configuration validation):
4512 - Configuration validation can now be done by per-module callbacks,
4513 rather than a global validation function. This will let us reduce
4514 the size of config.c and some of its more cumbersome functions.
4515 Closes ticket 31241.
4517 o Minor features (configuration):
4518 - If a configured hardware crypto accelerator in AccelName is
4519 prefixed with "!", Tor now exits when it cannot be found. Closes
4521 - We now use flag-driven logic to warn about obsolete configuration
4522 fields, so that we can include their names. In 0.4.2, we used a
4523 special type, which prevented us from generating good warnings.
4524 Implements ticket 32404.
4526 o Minor features (controller):
4527 - Add stream isolation data to STREAM event. Closes ticket 19859.
4528 - Implement a new GETINFO command to fetch microdescriptor
4529 consensus. Closes ticket 31684.
4531 o Minor features (debugging, directory system):
4532 - Don't crash when we find a non-guard with a guard-fraction value
4533 set. Instead, log a bug warning, in an attempt to figure out how
4534 this happened. Diagnostic for ticket 32868.
4536 o Minor features (defense in depth):
4537 - Add additional checks around tor_vasprintf() usage, in case the
4538 function returns an error. Patch by Tobias Stoeckmann. Fixes
4541 o Minor features (developer tooling):
4542 - Remove the 0.2.9.x series branches from git scripts (git-merge-
4543 forward.sh, git-pull-all.sh, git-push-all.sh, git-setup-dirs.sh).
4544 Closes ticket 32772.
4546 o Minor features (developer tools):
4547 - Add a check_cocci_parse.sh script that checks that new code is
4548 parseable by Coccinelle. Add an exceptions file for unparseable
4549 files, and run the script from travis CI. Closes ticket 31919.
4550 - Call the check_cocci_parse.sh script from a 'check-cocci' Makefile
4551 target. Closes ticket 31919.
4552 - Add a rename_c_identifiers.py tool to rename a bunch of C
4553 identifiers at once, and generate a well-formed commit message
4554 describing the change. This should help with refactoring. Closes
4556 - Add some scripts in "scripts/coccinelle" to invoke the Coccinelle
4557 semantic patching tool with the correct flags. These flags are
4558 fairly easy to forget, and these scripts should help us use
4559 Coccinelle more effectively in the future. Closes ticket 31705.
4561 o Minor features (Doxygen):
4562 - Update Doxygen configuration file to a more recent template (from
4563 1.8.15). Closes ticket 32110.
4564 - "make doxygen" now works with out-of-tree builds. Closes
4566 - Make sure that doxygen outputs documentation for all of our C
4567 files. Previously, some were missing @file declarations, causing
4568 them to be ignored. Closes ticket 32307.
4569 - Our "make doxygen" target now respects --enable-fatal-warnings by
4570 default, and does not warn about items that are missing
4571 documentation. To warn about missing documentation, run configure
4572 with the "--enable-missing-doc-warnings" flag: doing so suspends
4573 fatal warnings for doxygen. Closes ticket 32385.
4575 o Minor features (git scripts):
4576 - Add TOR_EXTRA_CLONE_ARGS to git-setup-dirs.sh for git clone
4577 customisation. Closes ticket 32347.
4578 - Add git-setup-dirs.sh, which sets up an upstream git repository
4579 and worktrees for tor maintainers. Closes ticket 29603.
4580 - Add TOR_EXTRA_REMOTE_* to git-setup-dirs.sh for a custom extra
4581 remote. Closes ticket 32347.
4582 - Call the check_cocci_parse.sh script from the git commit and push
4583 hooks. Closes ticket 31919.
4584 - Make git-push-all.sh skip unchanged branches when pushing to
4585 upstream. The script already skipped unchanged test branches.
4586 Closes ticket 32216.
4587 - Make git-setup-dirs.sh create a master symlink in the worktree
4588 directory. Closes ticket 32347.
4589 - Skip unmodified source files when doing some existing git hook
4590 checks. Related to ticket 31919.
4592 o Minor features (IPv6, client):
4593 - Make Tor clients tell dual-stack exits that they prefer IPv6
4594 connections. This change is equivalent to setting the PreferIPv6
4595 flag on SOCKSPorts (and most other listener ports). Tor Browser
4596 has been setting this flag for some time, and we want to remove a
4597 client distinguisher at exits. Closes ticket 32637.
4599 o Minor features (portability, android):
4600 - When building for Android, disable some tests that depend on $HOME
4601 and/or pwdb, which Android doesn't have. Closes ticket 32825.
4602 Patch from Hans-Christoph Steiner.
4604 o Minor features (relay modularity):
4605 - Split the relay and server pluggable transport config code into
4606 separate files in the relay module. Disable this code when the
4607 relay module is disabled. Closes part of ticket 32213.
4608 - When the relay module is disabled, reject attempts to set the
4609 ORPort, DirPort, DirCache, BridgeRelay, ExtORPort, or
4610 ServerTransport* options, rather than ignoring the values of these
4611 options. Closes part of ticket 32213.
4613 o Minor features (relay):
4614 - When the relay module is disabled, change the default config so
4615 that DirCache is 0, and ClientOnly is 1. Closes ticket 32410.
4617 o Minor features (release tools):
4618 - Port our ChangeLog formatting and sorting tools to Python 3.
4619 Closes ticket 32704.
4621 o Minor features (testing):
4622 - Detect some common failure cases for test_parseconf.sh in
4623 src/test/conf_failures. Closes ticket 32451.
4624 - Allow test_parseconf.sh to test expected log outputs for successful
4625 configs, as well as failed configs. Closes ticket 32451.
4626 - The test_parseconf.sh script now supports result variants for any
4627 combination of the optional libraries lzma, nss, and zstd. Closes
4630 o Minor features (tests, Android):
4631 - When running the unit tests on Android, create temporary files in
4632 a subdirectory of /data/local/tmp. Closes ticket 32172. Based on a
4633 patch from Hans-Christoph Steiner.
4635 o Minor bugfixes (bridges):
4636 - Lowercase the configured value of BridgeDistribution before adding
4637 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4639 o Minor bugfixes (build system):
4640 - Fix "make autostyle" for out-of-tree builds. Fixes bug 32370;
4641 bugfix on 0.4.1.2-alpha.
4643 o Minor bugfixes (configuration handling):
4644 - Make control_event_conf_changed() take in a config_line_t instead
4645 of a smartlist of alternating key/value entries. Fixes bug 31531;
4646 bugfix on 0.2.3.3-alpha. Patch by Neel Chauhan.
4648 o Minor bugfixes (configuration):
4649 - Check for multiplication overflow when parsing memory units inside
4650 configuration. Fixes bug 30920; bugfix on 0.0.9rc1.
4651 - When dumping the configuration, stop adding a trailing space after
4652 the option name when there is no option value. This issue only
4653 affects options that accept an empty value or list. (Most options
4654 reject empty values, or delete the entire line from the dumped
4655 options.) Fixes bug 32352; bugfix on 0.0.9pre6.
4656 - Avoid changing the user's value of HardwareAccel as stored by
4657 SAVECONF, when AccelName is set but HardwareAccel is not. Fixes
4658 bug 32382; bugfix on 0.2.2.1-alpha.
4659 - When creating a KeyDirectory with the same location as the
4660 DataDirectory (not recommended), respect the DataDirectory's
4661 group-readable setting if one has not been set for the
4662 KeyDirectory. Fixes bug 27992; bugfix on 0.3.3.1-alpha.
4664 o Minor bugfixes (controller):
4665 - In routerstatus_has_changed(), check all the fields that are
4666 output over the control port. Fixes bug 20218; bugfix
4669 o Minor bugfixes (correctness checks):
4670 - Use GCC/Clang's printf-checking feature to make sure that
4671 tor_assertf() arguments are correctly typed. Fixes bug 32765;
4672 bugfix on 0.4.1.1-alpha.
4674 o Minor bugfixes (developer tools):
4675 - Allow paths starting with ./ in scripts/add_c_file.py. Fixes bug
4676 31336; bugfix on 0.4.1.2-alpha.
4678 o Minor bugfixes (dirauth module):
4679 - Split the dirauth config code into a separate file in the dirauth
4680 module. Disable this code when the dirauth module is disabled.
4681 Closes ticket 32213.
4682 - When the dirauth module is disabled, reject attempts to set the
4683 AuthoritativeDir option, rather than ignoring the value of the
4684 option. Fixes bug 32213; bugfix on 0.3.4.1-alpha.
4686 o Minor bugfixes (embedded Tor):
4687 - When starting Tor any time after the first time in a process,
4688 register the thread in which it is running as the main thread.
4689 Previously, we only did this on Windows, which could lead to bugs
4690 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
4693 o Minor bugfixes (git scripts):
4694 - Avoid sleeping before the last push in git-push-all.sh. Closes
4696 - Forward all unrecognised arguments in git-push-all.sh to git push.
4697 Closes ticket 32216.
4699 o Minor bugfixes (hidden service v3):
4700 - Do not rely on a "circuit established" flag for intro circuits but
4701 instead always query the HS circuit map. This is to avoid sync
4702 issue with that flag and the map. Fixes bug 32094; bugfix
4705 o Minor bugfixes (logging, crash):
4706 - Avoid a possible crash when trying to log a (fatal) assertion
4707 failure about mismatched magic numbers in configuration objects.
4708 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
4710 o Minor bugfixes (onion service v2):
4711 - When sending the INTRO cell for a v2 Onion Service, look at the
4712 failure cache alongside timeout values to check if the intro point
4713 is marked as failed. Previously, we only looked at the relay
4714 timeout values. Fixes bug 25568; bugfix on 0.2.7.3-rc. Patch by
4717 o Minor bugfixes (onion services v3, client):
4718 - Properly handle the client rendezvous circuit timeout. Previously
4719 Tor would sometimes timeout a rendezvous circuit awaiting the
4720 introduction ACK, and find itself unable to re-establish all
4721 circuits because the rendezvous circuit timed out too early. Fixes
4722 bug 32021; bugfix on 0.3.2.1-alpha.
4724 o Minor bugfixes (onion services):
4725 - In cancel_descriptor_fetches(), use
4726 connection_list_by_type_purpose() instead of
4727 connection_list_by_type_state(). Fixes bug 32639; bugfix on
4728 0.3.2.1-alpha. Patch by Neel Chauhan.
4730 o Minor bugfixes (scripts):
4731 - Fix update_versions.py for out-of-tree builds. Fixes bug 32371;
4732 bugfix on 0.4.0.1-alpha.
4734 o Minor bugfixes (test):
4735 - Use the same code to find the tor binary in all of our test
4736 scripts. This change makes sure we are always using the coverage
4737 binary when coverage is enabled. Fixes bug 32368; bugfix
4740 o Minor bugfixes (testing):
4741 - Stop ignoring "tor --dump-config" errors in test_parseconf.sh.
4742 Fixes bug 32468; bugfix on 0.4.2.1-alpha.
4743 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
4744 test_practracker.sh script. Doing so caused a test failure. Fixes
4745 bug 32705; bugfix on 0.4.2.1-alpha.
4746 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
4747 skipping practracker checks. Fixes bug 32705; bugfix
4750 o Minor bugfixes (tests):
4751 - Our option-validation tests no longer depend on specially
4752 configured non-default, non-passing sets of options. Previously,
4753 the tests had been written to assume that options would _not_ be
4754 set to their defaults, which led to needless complexity and
4755 verbosity. Fixes bug 32175; bugfix on 0.2.8.1-alpha.
4757 o Minor bugfixes (windows service):
4758 - Initialize the publish/subscribe system when running as a windows
4759 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
4761 o Deprecated features:
4762 - Deprecate the ClientAutoIPv6ORPort option. This option was not
4763 true "Happy Eyeballs", and often failed on connections that
4764 weren't reliably dual-stack. Closes ticket 32942. Patch by
4768 - Provide a quickstart guide for a Circuit Padding Framework, and
4769 documentation for researchers to implement and study circuit
4770 padding machines. Closes ticket 28804.
4771 - Add documentation in 'HelpfulTools.md' to describe how to build a
4772 tag file. Closes ticket 32779.
4773 - Create a high-level description of the long-term software
4774 architecture goals. Closes ticket 32206.
4775 - Describe the --dump-config command in the manual page. Closes
4777 - Unite coding advice from this_not_that.md in torguts repo into our
4778 coding standards document. Resolves ticket 31853.
4781 - Our Doxygen configuration no longer generates LaTeX output. The
4782 reference manual produced by doing this was over 4000 pages long,
4783 and generally unusable. Closes ticket 32099.
4784 - The option "TestingEstimatedDescriptorPropagationTime" is now
4785 marked as obsolete. It has had no effect since 0.3.0.7, when
4786 clients stopped rejecting consensuses "from the future". Closes
4788 - We no longer support consensus methods before method 28; these
4789 methods were only used by authorities running versions of Tor that
4790 are now at end-of-life. In effect, this means that clients,
4791 relays, and authorities now assume that authorities will be
4792 running version 0.3.5.x or later. Closes ticket 32695.
4795 - Add more test cases for tor's UTF-8 validation function. Also,
4796 check the arguments passed to the function for consistency. Closes
4798 - Improve test coverage for relay and dirauth config code, focusing
4799 on option validation and normalization. Closes ticket 32213.
4800 - Improve the consistency of test_parseconf.sh output, and run all
4801 the tests, even if one fails. Closes ticket 32213.
4802 - Re-enable the Travis CI macOS Chutney build, but don't let it
4803 prevent the Travis job from finishing. (The Travis macOS jobs are
4804 slow, so we don't want to have it delay the whole CI process.)
4805 Closes ticket 32629.
4806 - Run the practracker unit tests in the pre-commit git hook. Closes
4808 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4809 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4810 fix the sandbox errors in 32722. Closes ticket 32240.
4812 o Code simplification and refactoring (channel):
4813 - Channel layer had a variable length cell handler that was not used
4814 and thus removed. Closes ticket 32892.
4816 o Code simplification and refactoring (configuration):
4817 - Immutability is now implemented as a flag on individual
4818 configuration options rather than as part of the option-transition
4819 checking code. Closes ticket 32344.
4820 - Instead of keeping a list of configuration options to check for
4821 relative paths, check all the options whose type is "FILENAME".
4822 Solves part of ticket 32339.
4823 - Our default log (which ordinarily sends NOTICE-level messages to
4824 standard output) is now handled in a more logical manner.
4825 Previously, we replaced the configured log options if they were
4826 empty. Now, we interpret an empty set of log options as meaning
4827 "use the default log". Closes ticket 31999.
4828 - Remove some unused arguments from the options_validate() function,
4829 to simplify our code and tests. Closes ticket 32187.
4830 - Simplify the options_validate() code so that it looks at the
4831 default options directly, rather than taking default options as an
4832 argument. This change lets us simplify its interface. Closes
4834 - Use our new configuration architecture to move most authority-
4835 related options to the directory authority module. Closes
4837 - When parsing the command line, handle options that determine our
4838 "quiet level" and our mode of operation (e.g., --dump-config and
4839 so on) all in one table. Closes ticket 32003.
4841 o Code simplification and refactoring (controller):
4842 - Create a new abstraction for formatting control protocol reply
4843 lines based on key-value pairs. Refactor some existing control
4844 protocol code to take advantage of this. Closes ticket 30984.
4845 - Create a helper function that can fetch network status or
4846 microdesc consensuses. Closes ticket 31684.
4848 o Code simplification and refactoring (dirauth modularization):
4849 - Remove the last remaining HAVE_MODULE_DIRAUTH inside a function.
4850 Closes ticket 32163.
4851 - Replace some confusing identifiers in process_descs.c. Closes
4853 - Simplify some relay and dirauth config code. Closes ticket 32213.
4855 o Code simplification and refactoring (misc):
4856 - Make all the structs we declare follow the same naming convention
4857 of ending with "_t". Closes ticket 32415.
4858 - Move and rename some configuration-related code for clarity.
4859 Closes ticket 32304.
4860 - Our include.am files are now broken up by subdirectory.
4861 Previously, src/core/include.am covered all of the subdirectories
4862 in "core", "feature", and "app". Closes ticket 32137.
4863 - Remove underused NS*() macros from test code: they make our tests
4864 more confusing, especially for code-formatting tools. Closes
4867 o Code simplification and refactoring (relay modularization):
4868 - Disable relay_periodic when the relay module is disabled. Closes
4870 - Disable relay_sys when the relay module is disabled. Closes
4873 o Code simplification and refactoring (tool support):
4874 - Add numerous missing dependencies to our include files, so that
4875 they can be included in different reasonable orders and still
4876 compile. Addresses part of ticket 32764.
4877 - Fix some parts of our code that were difficult for Coccinelle to
4878 parse. Related to ticket 31705.
4879 - Fix some small issues in our code that prevented automatic
4880 formatting tools from working. Addresses part of ticket 32764.
4882 o Documentation (manpage):
4883 - Alphabetize the Client Options section of the tor manpage. Closes
4885 - Alphabetize the General Options section of the tor manpage. Closes
4887 - In the tor(1) manpage, reword and improve formatting of the
4888 COMMAND-LINE OPTIONS and DESCRIPTION sections. Closes ticket
4889 32277. Based on work by Swati Thacker as part of Google Season
4891 - In the tor(1) manpage, reword and improve formatting of the FILES,
4892 SEE ALSO, and BUGS sections. Closes ticket 32176. Based on work by
4893 Swati Thacker as part of Google Season of Docs.
4895 o Testing (circuit, EWMA):
4896 - Add unit tests for circuitmux and EWMA subsystems. Closes
4899 o Testing (continuous integration):
4900 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4903 Changes in version 0.4.2.5 - 2019-12-09
4904 This is the first stable release in the 0.4.2.x series. This series
4905 improves reliability and stability, and includes several stability and
4906 correctness improvements for onion services. It also fixes many smaller
4907 bugs present in previous series.
4909 Per our support policy, we will support the 0.4.2.x series for nine
4910 months, or until three months after the release of a stable 0.4.3.x:
4911 whichever is longer. If you need longer-term support, please stick
4912 with 0.3.5.x, which will we plan to support until Feb 2022.
4914 Per our support policy, we will support the 0.4.2.x series for nine
4915 months, or until three months after the release of a stable 0.4.3.x:
4916 whichever is longer. If you need longer-term support, please stick
4917 with 0.3.5.x, which will we plan to support until Feb 2022.
4919 Below are the changes since 0.4.1.4-rc. For a complete list of changes
4920 since 0.4.1.5, see the ReleaseNotes file.
4922 o Minor features (geoip):
4923 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
4924 Country database. Closes ticket 32685.
4927 - Require C99 standards-conforming code in Travis CI, but allow GNU
4928 gcc extensions. Also activates clang's -Wtypedef-redefinition
4929 warnings. Build some jobs with -std=gnu99, and some jobs without.
4930 Closes ticket 32500.
4933 Changes in version 0.4.1.7 - 2019-12-09
4934 This release backports several bugfixes to improve stability and
4935 correctness. Anyone experiencing build problems or crashes with 0.4.1.6,
4936 including all relays relying on AccountingMax, should upgrade.
4938 o Major features (directory authorities, backport from 0.4.2.2-alpha):
4939 - Directory authorities now reject relays running all currently
4940 deprecated release series. The currently supported release series
4941 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
4943 o Major bugfixes (embedded Tor, backport from 0.4.2.2-alpha):
4944 - Avoid a possible crash when restarting Tor in embedded mode and
4945 enabling a different set of publish/subscribe messages. Fixes bug
4946 31898; bugfix on 0.4.1.1-alpha.
4948 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
4949 - Relays now respect their AccountingMax bandwidth again. When
4950 relays entered "soft" hibernation (which typically starts when
4951 we've hit 90% of our AccountingMax), we had stopped checking
4952 whether we should enter hard hibernation. Soft hibernation refuses
4953 new connections and new circuits, but the existing circuits can
4954 continue, meaning that relays could have exceeded their configured
4955 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
4957 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
4958 - Stop ignoring torrc options after an %include directive, when the
4959 included directory ends with a file that does not contain any
4960 config options (but does contain comments or whitespace). Fixes
4961 bug 31408; bugfix on 0.3.1.1-alpha.
4963 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
4964 - Onion services now always use the exact number of intro points
4965 configured with the HiddenServiceNumIntroductionPoints option (or
4966 fewer if nodes are excluded). Before, a service could sometimes
4967 pick more intro points than configured. Fixes bug 31548; bugfix
4970 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
4971 - When building on Appveyor and Travis, pass the "-k" flag to make,
4972 so that we are informed of all compilation failures, not just the
4973 first one or two. Closes ticket 31372.
4975 o Minor features (geoip, backport from 0.4.2.5):
4976 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
4977 Country database. Closes ticket 32685.
4979 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
4980 - Avoid spurious errors when Appveyor CI fails before the install step.
4981 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
4983 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
4984 - Fix a BUG() assertion that occurs within a very small race window
4985 between when a client intro circuit opens and when its descriptor
4986 gets cleaned up from the cache. The circuit is now closed early,
4987 which will trigger a re-fetch of the descriptor and continue the
4988 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
4990 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
4991 - Avoid trying to read data from closed connections, which can cause
4992 needless loops in Libevent and infinite loops in Shadow. Fixes bug
4993 30344; bugfix on 0.1.1.1-alpha.
4995 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
4996 - On abort, try harder to flush the output buffers of log messages.
4997 On some platforms (macOS), log messages could be discarded when
4998 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4999 - Report the tor version whenever an assertion fails. Previously, we
5000 only reported the Tor version on some crashes, and some non-fatal
5001 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5002 - When tor aborts due to an error, close log file descriptors before
5003 aborting. Closing the logs makes some OSes flush log file buffers,
5004 rather than deleting buffered log lines. Fixes bug 31594; bugfix
5007 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
5008 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
5009 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
5010 - Disable backtrace signal handlers when shutting down tor. Fixes
5011 bug 31614; bugfix on 0.2.5.2-alpha.
5012 - Rate-limit the logging message about the obsolete .exit
5013 notation. Previously, there was no limit on this warning, which
5014 could potentially be triggered many times by a hostile website.
5015 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
5017 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
5018 - Do not log a nonfatal assertion failure when receiving a VERSIONS
5019 cell on a connection using the obsolete v1 link protocol. Log a
5020 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
5022 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
5023 - Reset the periodic events' "enabled" flag when Tor is shut down
5024 cleanly. Previously, this flag was left on, which caused periodic
5025 events not to be re-enabled when Tor was relaunched in-process
5026 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5029 o Minor bugfixes (multithreading, backport from 0.4.2.2-alpha):
5030 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
5031 31736; bugfix on 0.0.7.
5033 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
5034 - Remove overly strict assertions that triggered when a pluggable
5035 transport failed to launch. Fixes bug 31091; bugfix
5037 - Remove an assertion in the Unix process backend. This assertion
5038 would trigger when we failed to find the executable for a child
5039 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
5041 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
5042 - Avoid crashing when starting with a corrupt keys directory where
5043 the old ntor key and the new ntor key are identical. Fixes bug
5044 30916; bugfix on 0.2.4.8-alpha.
5046 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
5047 - When testing port rebinding, don't busy-wait for tor to log.
5048 Instead, actually sleep for a short time before polling again.
5049 Also improve the formatting of control commands and log messages.
5050 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5052 o Minor bugfixes (tests, SunOS, backport from 0.4.2.2-alpha):
5053 - Avoid a map_anon_nofork test failure due to a signed/unsigned
5054 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
5056 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
5057 - Log bugs about the TLS read buffer's length only once, rather than
5058 filling the logs with similar warnings. Fixes bug 31939; bugfix
5061 o Documentation (backport from 0.4.2.2-alpha):
5062 - Explain why we can't destroy the backtrace buffer mutex. Explain
5063 why we don't need to destroy the log mutex. Closes ticket 31736.
5065 o Testing (continuous integration, backport from 0.4.2.3-alpha):
5066 - Disable all but one Travis CI macOS build, to mitigate slow
5067 scheduling of Travis macOS jobs. Closes ticket 32177.
5068 - Run the chutney IPv6 networks as part of Travis CI. Closes
5070 - Simplify the Travis CI build matrix, and optimise for build time.
5071 Closes ticket 31859.
5072 - Use Windows Server 2019 instead of Windows Server 2016 in our
5073 Appveyor builds. Closes ticket 32086.
5075 o Testing (continuous integration, backport from 0.4.2.4-rc):
5076 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5077 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5078 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5079 until we can fix some Bionic permissions issues (see ticket
5080 32240). Related to ticket 31919.
5081 - Install the mingw OpenSSL package in Appveyor. This makes sure
5082 that the OpenSSL headers and libraries match in Tor's Appveyor
5083 builds. (This bug was triggered by an Appveyor image update.)
5084 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5086 o Testing (continuous integration, backport from 0.4.2.5):
5087 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
5088 extensions. Also activates clang's -Wtypedef-redefinition warnings.
5089 Build some jobs with -std=gnu99, and some jobs without.
5090 Closes ticket 32500.
5093 Changes in version 0.4.0.6 - 2019-12-09
5094 This is the second stable release in the 0.4.0.x series. This release
5095 backports several bugfixes to improve stability and correctness. Anyone
5096 experiencing build problems or crashes with 0.4.0.5, including all relays
5097 relying on AccountingMax, should upgrade.
5099 Note that, per our support policy, support for the 0.4.0.x series will end
5100 on 2 Feb 2020. Anyone still running 0.4.0.x should plan to upgrade to the
5101 latest stable release, or downgrade to 0.3.5.x, which will get long-term
5102 support until 1 Feb 2022.
5104 o Directory authority changes (backport from 0.4.1.5):
5105 - The directory authority "dizum" has a new IP address. Closes
5108 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
5109 - Consider our directory information to have changed when our list
5110 of bridges changes. Previously, Tor would not re-compute the
5111 status of its directory information when bridges changed, and
5112 therefore would not realize that it was no longer able to build
5113 circuits. Fixes part of bug 29875.
5114 - Do not count previously configured working bridges towards our
5115 total of working bridges. Previously, when Tor's list of bridges
5116 changed, it would think that the old bridges were still usable,
5117 and delay fetching router descriptors for the new ones. Fixes part
5118 of bug 29875; bugfix on 0.3.0.1-alpha.
5120 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
5121 - When considering upgrading circuits from "waiting for guard" to
5122 "open", always ignore circuits that are marked for close. Otherwise,
5123 we can end up in the situation where a subsystem is notified that
5124 a closing circuit has just opened, leading to undesirable
5125 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
5127 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
5128 - Properly clean up the introduction point map when circuits change
5129 purpose from onion service circuits to pathbias, measurement, or
5130 other circuit types. This should fix some service-side instances
5131 of introduction point failure. Fixes bug 29034; bugfix
5134 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
5135 - Fix an unreachable bug in which an introduction point could try to
5136 send an INTRODUCE_ACK with a status code that Trunnel would refuse
5137 to encode, leading the relay to assert(). We've consolidated the
5138 ABI values into Trunnel now. Fixes bug 30454; bugfix
5140 - Clients can now handle unknown status codes from INTRODUCE_ACK
5141 cells. (The NACK behavior will stay the same.) This will allow us
5142 to extend status codes in the future without breaking the normal
5143 client behavior. Fixes another part of bug 30454; bugfix
5146 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
5147 - Relays now respect their AccountingMax bandwidth again. When
5148 relays entered "soft" hibernation (which typically starts when
5149 we've hit 90% of our AccountingMax), we had stopped checking
5150 whether we should enter hard hibernation. Soft hibernation refuses
5151 new connections and new circuits, but the existing circuits can
5152 continue, meaning that relays could have exceeded their configured
5153 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
5155 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
5156 - Stop ignoring torrc options after an %include directive, when the
5157 included directory ends with a file that does not contain any
5158 config options (but does contain comments or whitespace). Fixes
5159 bug 31408; bugfix on 0.3.1.1-alpha.
5161 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
5162 - Onion services now always use the exact number of intro points
5163 configured with the HiddenServiceNumIntroductionPoints option (or
5164 fewer if nodes are excluded). Before, a service could sometimes
5165 pick more intro points than configured. Fixes bug 31548; bugfix
5168 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
5169 - Add a "--list-modules" command to print a list of which compile-
5170 time modules are enabled. Closes ticket 30452.
5172 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
5173 - Remove sudo configuration lines from .travis.yml as they are no
5174 longer needed with current Travis build environment. Resolves
5177 o Minor features (continuous integration, backport from 0.4.1.4-rc):
5178 - Our Travis configuration now uses Chutney to run some network
5179 integration tests automatically. Closes ticket 29280.
5181 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
5182 - When building on Appveyor and Travis, pass the "-k" flag to make,
5183 so that we are informed of all compilation failures, not just the
5184 first one or two. Closes ticket 31372.
5186 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
5187 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
5188 in December 2018 (of which ~122 were still functional), with a
5189 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
5190 in June 2019. Closes ticket 28795.
5192 o Minor features (geoip, backport from 0.4.2.5):
5193 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
5194 Country database. Closes ticket 32685.
5196 o Minor features (stem tests, backport from 0.4.2.1-alpha):
5197 - Change "make test-stem" so it only runs the stem tests that use
5198 tor. This change makes test-stem faster and more reliable. Closes
5201 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
5202 - Avoid spurious errors when Appveyor CI fails before the install step.
5203 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
5205 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
5206 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
5207 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
5209 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
5210 - Fix a logic error that prevented the SessionGroup sub-option from
5211 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
5213 o Minor bugfixes (circuit padding, backport from 0.4.1.4-rc):
5214 - On relays, properly check that a padding machine is absent before
5215 logging a warning about it being absent. Fixes bug 30649; bugfix
5218 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
5219 - Fix a BUG() assertion that occurs within a very small race window
5220 between when a client intro circuit opens and when its descriptor
5221 gets cleaned up from the cache. The circuit is now closed early,
5222 which will trigger a re-fetch of the descriptor and continue the
5223 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
5225 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
5226 - Don't believe clock skew results from NETINFO cells that appear to
5227 arrive before we sent the VERSIONS cells they are responding to.
5228 Previously, we would accept them up to 3 minutes "in the past".
5229 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5231 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
5232 - Fix a compilation warning on Windows about casting a function
5233 pointer for GetTickCount64(). Fixes bug 31374; bugfix
5236 o Minor bugfixes (compilation, backport from 0.4.1.5):
5237 - Avoid using labs() on time_t, which can cause compilation warnings
5238 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5240 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
5241 - Suppress spurious float-conversion warnings from GCC when calling
5242 floating-point classifier functions on FreeBSD. Fixes part of bug
5243 31687; bugfix on 0.3.1.5-alpha.
5245 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
5246 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
5247 due to missing declarations of abort(), and prevent other such
5248 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
5250 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
5251 - Fix a bug that prevented us from supporting SOCKS5 proxies that
5252 want authentication along with configured (but unused!)
5253 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
5255 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
5256 - Avoid trying to read data from closed connections, which can cause
5257 needless loops in Libevent and infinite loops in Shadow. Fixes bug
5258 30344; bugfix on 0.1.1.1-alpha.
5260 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
5261 - Allow the test-stem job to fail in Travis, because it sometimes
5262 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
5263 - Skip test_rebind on macOS in Travis, because it is unreliable on
5264 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5265 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
5266 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5268 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
5269 - Avoid a set of possible code paths that could try to use freed
5270 memory in routerlist_free() while Tor was exiting. Fixes bug
5271 31003; bugfix on 0.1.2.2-alpha.
5273 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
5274 - Stop crashing after parsing an unknown descriptor purpose
5275 annotation. We think this bug can only be triggered by modifying a
5276 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
5278 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
5279 - Move the "bandwidth-file-headers" line in directory authority
5280 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
5283 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
5284 - On abort, try harder to flush the output buffers of log messages.
5285 On some platforms (macOS), log messages could be discarded when
5286 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5287 - Report the tor version whenever an assertion fails. Previously, we
5288 only reported the Tor version on some crashes, and some non-fatal
5289 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5291 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
5292 - When extracting an IPv6 address from a PF-based proxy, verify that
5293 we are actually configured to receive an IPv6 address, and log an
5294 internal error if not. Fixes part of bug 31687; bugfix
5297 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
5298 - When tor is missing descriptors for some primary entry guards,
5299 make the log message less alarming. It's normal for descriptors to
5300 expire, as long as tor fetches new ones soon after. Fixes bug
5301 31657; bugfix on 0.3.3.1-alpha.
5303 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
5304 - Do not log a warning when running with an OpenSSL version other
5305 than the one Tor was compiled with, if the two versions should be
5306 compatible. Previously, we would warn whenever the version was
5307 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
5309 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
5310 - Change log level of message "Hash of session info was not as
5311 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
5314 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
5315 - Rate-limit the logging message about the obsolete .exit
5316 notation. Previously, there was no limit on this warning, which
5317 could potentially be triggered many times by a hostile website.
5318 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
5320 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
5321 - Do not log a nonfatal assertion failure when receiving a VERSIONS
5322 cell on a connection using the obsolete v1 link protocol. Log a
5323 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
5325 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
5326 - Reset the periodic events' "enabled" flag when Tor is shut down
5327 cleanly. Previously, this flag was left on, which caused periodic
5328 events not to be re-enabled when Tor was relaunched in-process
5329 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5332 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
5333 - Avoid a minor memory leak that could occur on relays when failing
5334 to create a "keys" directory. Fixes bug 30148; bugfix
5337 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
5338 - Fix a trivial memory leak when parsing an invalid value
5339 from a download schedule in the configuration. Fixes bug
5340 30894; bugfix on 0.3.4.1-alpha.
5342 o Minor bugfixes (NetBSD, backport from 0.4.1.2-alpha):
5343 - Fix usage of minherit() on NetBSD and other platforms that define
5344 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
5345 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
5347 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
5348 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
5349 implementation) when failing to load an onion service client
5350 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
5352 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
5353 - When purging the DNS cache because of an out-of-memory condition,
5354 try purging just the older entries at first. Previously, we would
5355 always purge the whole thing. Fixes bug 29617; bugfix
5358 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
5359 - Avoid crashing in our tor_vasprintf() implementation on systems
5360 that define neither vasprintf() nor _vscprintf(). (This bug has
5361 been here long enough that we question whether people are running
5362 Tor on such systems, but we're applying the fix out of caution.)
5363 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
5366 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
5367 - Remove overly strict assertions that triggered when a pluggable
5368 transport failed to launch. Fixes bug 31091; bugfix
5370 - Remove an assertion in the Unix process backend. This assertion
5371 would trigger when we failed to find the executable for a child
5372 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
5374 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
5375 - Avoid crashing when starting with a corrupt keys directory where
5376 the old ntor key and the new ntor key are identical. Fixes bug
5377 30916; bugfix on 0.2.4.8-alpha.
5379 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
5380 - Correctly exclude a redundant rust build job in Travis. Fixes bug
5381 31463; bugfix on 0.3.5.4-alpha.
5383 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
5384 - When testing port rebinding, don't busy-wait for tor to log.
5385 Instead, actually sleep for a short time before polling again.
5386 Also improve the formatting of control commands and log messages.
5387 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5389 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
5390 - Log bugs about the TLS read buffer's length only once, rather than
5391 filling the logs with similar warnings. Fixes bug 31939; bugfix
5394 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
5395 - Always retry v2 single onion service intro and rend circuits with
5396 a 3-hop path. Previously, v2 single onion services used a 3-hop
5397 path when rendezvous circuits were retried after a remote or
5398 delayed failure, but a 1-hop path for immediate retries. Fixes bug
5399 23818; bugfix on 0.2.9.3-alpha.
5400 - Make v3 single onion services fall back to a 3-hop intro, when all
5401 intro points are unreachable via a 1-hop path. Previously, v3
5402 single onion services failed when all intro nodes were unreachable
5403 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
5405 o Documentation (backport from 0.4.2.1-alpha):
5406 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
5407 notice.html so that operators no longer have to host it
5408 themselves. Closes ticket 31089.
5410 o Testing (backport from 0.4.1.2-alpha):
5411 - Specify torrc paths (with empty files) when launching tor in
5412 integration tests; refrain from reading user and system torrcs.
5413 Resolves issue 29702.
5415 o Testing (continuous integration, backport from 0.4.1.1-alpha):
5416 - In Travis, show stem's tor log after failure. Closes ticket 30234.
5418 o Testing (continuous integration, backport from 0.4.1.5):
5419 - In Travis, make stem log a controller trace to the console, and
5420 tail stem's tor log after failure. Closes ticket 30591.
5421 - In Travis, only run the stem tests that use a tor binary. Closes
5424 o Testing (continuous integration, backport from 0.4.2.3-alpha):
5425 - Disable all but one Travis CI macOS build, to mitigate slow
5426 scheduling of Travis macOS jobs. Closes ticket 32177.
5427 - Run the chutney IPv6 networks as part of Travis CI. Closes
5429 - Simplify the Travis CI build matrix, and optimise for build time.
5430 Closes ticket 31859.
5431 - Use Windows Server 2019 instead of Windows Server 2016 in our
5432 Appveyor builds. Closes ticket 32086.
5434 o Testing (continuous integration, backport from 0.4.2.4-rc):
5435 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5436 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5437 until we can fix some Bionic permissions issues (see ticket
5438 32240). Related to ticket 31919.
5439 - Install the mingw OpenSSL package in Appveyor. This makes sure
5440 that the OpenSSL headers and libraries match in Tor's Appveyor
5441 builds. (This bug was triggered by an Appveyor image update.)
5442 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5443 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5445 o Testing (continuous integration, backport from 0.4.2.5):
5446 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
5447 extensions. Also activates clang's -Wtypedef-redefinition warnings.
5448 Build some jobs with -std=gnu99, and some jobs without.
5449 Closes ticket 32500.
5451 Changes in version 0.3.5.9 - 2019-12-09
5452 Tor 0.3.5.9 backports serveral fixes from later releases, including
5453 several that affect bridge users, relay stability, onion services,
5456 o Directory authority changes (backport from 0.4.1.5):
5457 - The directory authority "dizum" has a new IP address. Closes
5460 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
5461 - Consider our directory information to have changed when our list
5462 of bridges changes. Previously, Tor would not re-compute the
5463 status of its directory information when bridges changed, and
5464 therefore would not realize that it was no longer able to build
5465 circuits. Fixes part of bug 29875.
5466 - Do not count previously configured working bridges towards our
5467 total of working bridges. Previously, when Tor's list of bridges
5468 changed, it would think that the old bridges were still usable,
5469 and delay fetching router descriptors for the new ones. Fixes part
5470 of bug 29875; bugfix on 0.3.0.1-alpha.
5472 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
5473 - When considering upgrading circuits from "waiting for guard" to
5474 "open", always ignore circuits that are marked for close. Otherwise,
5475 we can end up in the situation where a subsystem is notified that
5476 a closing circuit has just opened, leading to undesirable
5477 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
5479 o Major bugfixes (NSS, relay, backport from 0.4.0.4-rc):
5480 - When running with NSS, disable TLS 1.2 ciphersuites that use
5481 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
5482 these ciphersuites don't work -- which caused relays to fail to
5483 handshake with one another when these ciphersuites were enabled.
5484 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
5486 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
5487 - Properly clean up the introduction point map when circuits change
5488 purpose from onion service circuits to pathbias, measurement, or
5489 other circuit types. This should fix some service-side instances
5490 of introduction point failure. Fixes bug 29034; bugfix
5493 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
5494 - Fix an unreachable bug in which an introduction point could try to
5495 send an INTRODUCE_ACK with a status code that Trunnel would refuse
5496 to encode, leading the relay to assert(). We've consolidated the
5497 ABI values into Trunnel now. Fixes bug 30454; bugfix
5499 - Clients can now handle unknown status codes from INTRODUCE_ACK
5500 cells. (The NACK behavior will stay the same.) This will allow us
5501 to extend status codes in the future without breaking the normal
5502 client behavior. Fixes another part of bug 30454; bugfix
5505 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
5506 - Stop ignoring torrc options after an %include directive, when the
5507 included directory ends with a file that does not contain any
5508 config options (but does contain comments or whitespace). Fixes
5509 bug 31408; bugfix on 0.3.1.1-alpha.
5511 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
5512 - Onion services now always use the exact number of intro points
5513 configured with the HiddenServiceNumIntroductionPoints option (or
5514 fewer if nodes are excluded). Before, a service could sometimes
5515 pick more intro points than configured. Fixes bug 31548; bugfix
5518 o Minor features (address selection, backport from 0.4.0.3-alpha):
5519 - Treat the subnet 100.64.0.0/10 as public for some purposes;
5520 private for others. This subnet is the RFC 6598 (Carrier Grade
5521 NAT) IP range, and is deployed by many ISPs as an alternative to
5522 RFC 1918 that does not break existing internal networks. Tor now
5523 blocks SOCKS and control ports on these addresses and warns users
5524 if client ports or ExtORPorts are listening on a RFC 6598 address.
5525 Closes ticket 28525. Patch by Neel Chauhan.
5527 o Minor features (bandwidth authority, backport from 0.4.0.4-rc):
5528 - Make bandwidth authorities ignore relays that are reported in the
5529 bandwidth file with the flag "vote=0". This change allows us to
5530 report unmeasured relays for diagnostic reasons without including
5531 their bandwidth in the bandwidth authorities' vote. Closes
5534 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
5535 - Add a "--list-modules" command to print a list of which compile-
5536 time modules are enabled. Closes ticket 30452.
5538 o Minor features (continuous integration, backport from 0.4.0.4-rc):
5539 - On Travis Rust builds, cleanup Rust registry and refrain from
5540 caching the "target/" directory to speed up builds. Resolves
5543 o Minor features (continuous integration, backport from 0.4.0.5):
5544 - In Travis, tell timelimit to use stem's backtrace signals, and
5545 launch python directly from timelimit, so python receives the
5546 signals from timelimit, rather than make. Closes ticket 30117.
5548 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
5549 - Remove sudo configuration lines from .travis.yml as they are no
5550 longer needed with current Travis build environment. Resolves
5553 o Minor features (continuous integration, backport from 0.4.1.4-rc):
5554 - Our Travis configuration now uses Chutney to run some network
5555 integration tests automatically. Closes ticket 29280.
5557 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
5558 - When building on Appveyor and Travis, pass the "-k" flag to make,
5559 so that we are informed of all compilation failures, not just the
5560 first one or two. Closes ticket 31372.
5562 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
5563 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
5564 in December 2018 (of which ~122 were still functional), with a
5565 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
5566 in June 2019. Closes ticket 28795.
5568 o Minor features (geoip, backport from 0.4.2.5):
5569 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
5570 Country database. Closes ticket 32685.
5572 o Minor features (NSS, diagnostic, backport from 0.4.0.4-rc):
5573 - Try to log an error from NSS (if there is any) and a more useful
5574 description of our situation if we are using NSS and a call to
5575 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
5577 o Minor features (stem tests, backport from 0.4.2.1-alpha):
5578 - Change "make test-stem" so it only runs the stem tests that use
5579 tor. This change makes test-stem faster and more reliable. Closes
5582 o Minor bugfixes (security, backport from 0.4.0.4-rc):
5583 - Verify in more places that we are not about to create a buffer
5584 with more than INT_MAX bytes, to avoid possible OOB access in the
5585 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
5586 fixed by Tobias Stoeckmann.
5587 - Fix a potential double free bug when reading huge bandwidth files.
5588 The issue is not exploitable in the current Tor network because
5589 the vulnerable code is only reached when directory authorities
5590 read bandwidth files, but bandwidth files come from a trusted
5591 source (usually the authorities themselves). Furthermore, the
5592 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
5593 which are not used by any of the current authorities. Fixes bug
5594 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
5597 o Minor bugfix (continuous integration, backport from 0.4.0.4-rc):
5598 - Reset coverage state on disk after Travis CI has finished. This
5599 should prevent future coverage merge errors from causing the test
5600 suite for the "process" subsystem to fail. The process subsystem
5601 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
5603 - Terminate test-stem if it takes more than 9.5 minutes to run.
5604 (Travis terminates the job after 10 minutes of no output.)
5605 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
5607 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
5608 - Avoid spurious errors when Appveyor CI fails before the install step.
5609 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
5611 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
5612 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
5613 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
5615 o Minor bugfixes (C correctness, backport from 0.4.0.4-rc):
5616 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
5617 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
5620 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
5621 - Fix a logic error that prevented the SessionGroup sub-option from
5622 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
5624 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
5625 - Fix a BUG() assertion that occurs within a very small race window
5626 between when a client intro circuit opens and when its descriptor
5627 gets cleaned up from the cache. The circuit is now closed early,
5628 which will trigger a re-fetch of the descriptor and continue the
5629 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
5631 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
5632 - Don't believe clock skew results from NETINFO cells that appear to
5633 arrive before we sent the VERSIONS cells they are responding to.
5634 Previously, we would accept them up to 3 minutes "in the past".
5635 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5637 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
5638 - Fix a compilation warning on Windows about casting a function
5639 pointer for GetTickCount64(). Fixes bug 31374; bugfix
5642 o Minor bugfixes (compilation, backport from 0.4.0.2-alpha):
5643 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
5644 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
5646 o Minor bugfixes (compilation, backport from 0.4.1.5):
5647 - Avoid using labs() on time_t, which can cause compilation warnings
5648 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5650 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
5651 - Suppress spurious float-conversion warnings from GCC when calling
5652 floating-point classifier functions on FreeBSD. Fixes part of bug
5653 31687; bugfix on 0.3.1.5-alpha.
5655 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
5656 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
5657 due to missing declarations of abort(), and prevent other such
5658 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
5660 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
5661 - Fix a bug that prevented us from supporting SOCKS5 proxies that
5662 want authentication along with configured (but unused!)
5663 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
5665 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
5666 - Avoid trying to read data from closed connections, which can cause
5667 needless loops in Libevent and infinite loops in Shadow. Fixes bug
5668 30344; bugfix on 0.1.1.1-alpha.
5670 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
5671 - Allow the test-stem job to fail in Travis, because it sometimes
5672 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
5673 - Skip test_rebind on macOS in Travis, because it is unreliable on
5674 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5675 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
5676 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5678 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
5679 - Avoid a set of possible code paths that could try to use freed
5680 memory in routerlist_free() while Tor was exiting. Fixes bug
5681 31003; bugfix on 0.1.2.2-alpha.
5683 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
5684 - Stop crashing after parsing an unknown descriptor purpose
5685 annotation. We think this bug can only be triggered by modifying a
5686 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
5688 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
5689 - Move the "bandwidth-file-headers" line in directory authority
5690 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
5693 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
5694 - On abort, try harder to flush the output buffers of log messages.
5695 On some platforms (macOS), log messages could be discarded when
5696 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5697 - Report the tor version whenever an assertion fails. Previously, we
5698 only reported the Tor version on some crashes, and some non-fatal
5699 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5701 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
5702 - When extracting an IPv6 address from a PF-based proxy, verify that
5703 we are actually configured to receive an IPv6 address, and log an
5704 internal error if not. Fixes part of bug 31687; bugfix
5707 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
5708 - When tor is missing descriptors for some primary entry guards,
5709 make the log message less alarming. It's normal for descriptors to
5710 expire, as long as tor fetches new ones soon after. Fixes bug
5711 31657; bugfix on 0.3.3.1-alpha.
5713 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
5714 - Avoid logging that we are relaxing a circuit timeout when that
5715 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
5717 o Minor bugfixes (logging, backport from 0.4.0.3-alpha):
5718 - Correct a misleading error message when IPv4Only or IPv6Only is
5719 used but the resolved address can not be interpreted as an address
5720 of the specified IP version. Fixes bug 13221; bugfix on
5721 0.2.3.9-alpha. Patch from Kris Katterjohn.
5722 - Log the correct port number for listening sockets when "auto" is
5723 used to let Tor pick the port number. Previously, port 0 was
5724 logged instead of the actual port number. Fixes bug 29144; bugfix
5725 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
5726 - Stop logging a BUG() warning when Tor is waiting for exit
5727 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
5729 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
5730 - Do not log a warning when running with an OpenSSL version other
5731 than the one Tor was compiled with, if the two versions should be
5732 compatible. Previously, we would warn whenever the version was
5733 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
5735 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
5736 - Change log level of message "Hash of session info was not as
5737 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
5740 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
5741 - Rate-limit the logging message about the obsolete .exit
5742 notation. Previously, there was no limit on this warning, which
5743 could potentially be triggered many times by a hostile website.
5744 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
5746 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
5747 - Do not log a nonfatal assertion failure when receiving a VERSIONS
5748 cell on a connection using the obsolete v1 link protocol. Log a
5749 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
5751 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
5752 - Reset the periodic events' "enabled" flag when Tor is shut down
5753 cleanly. Previously, this flag was left on, which caused periodic
5754 events not to be re-enabled when Tor was relaunched in-process
5755 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5758 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
5759 - Avoid a minor memory leak that could occur on relays when failing
5760 to create a "keys" directory. Fixes bug 30148; bugfix
5763 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
5764 - Fix a trivial memory leak when parsing an invalid value
5765 from a download schedule in the configuration. Fixes bug
5766 30894; bugfix on 0.3.4.1-alpha.
5768 o Minor bugfixes (memory management, backport from 0.4.0.3-alpha):
5769 - Refactor the shared random state's memory management so that it
5770 actually takes ownership of the shared random value pointers.
5771 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
5773 o Minor bugfixes (memory management, testing, backport from 0.4.0.3-alpha):
5774 - Stop leaking parts of the shared random state in the shared-random
5775 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
5777 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
5778 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
5779 implementation) when failing to load an onion service client
5780 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
5782 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
5783 - When purging the DNS cache because of an out-of-memory condition,
5784 try purging just the older entries at first. Previously, we would
5785 always purge the whole thing. Fixes bug 29617; bugfix
5788 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
5789 - Avoid crashing in our tor_vasprintf() implementation on systems
5790 that define neither vasprintf() nor _vscprintf(). (This bug has
5791 been here long enough that we question whether people are running
5792 Tor on such systems, but we're applying the fix out of caution.)
5793 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
5796 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
5797 - Avoid crashing when starting with a corrupt keys directory where
5798 the old ntor key and the new ntor key are identical. Fixes bug
5799 30916; bugfix on 0.2.4.8-alpha.
5801 o Minor bugfixes (rust, backport from 0.4.0.5):
5802 - Abort on panic in all build profiles, instead of potentially
5803 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
5805 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
5806 - Correctly exclude a redundant rust build job in Travis. Fixes bug
5807 31463; bugfix on 0.3.5.4-alpha.
5809 o Minor bugfixes (single onion services, backport from 0.4.0.3-alpha):
5810 - Allow connections to single onion services to remain idle without
5811 being disconnected. Previously, relays acting as rendezvous points
5812 for single onion services were mistakenly closing idle rendezvous
5813 circuits after 60 seconds, thinking that they were unused
5814 directory-fetching circuits that had served their purpose. Fixes
5815 bug 29665; bugfix on 0.2.1.26.
5817 o Minor bugfixes (stats, backport from 0.4.0.3-alpha):
5818 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
5819 relay and bridge extra-info documents. Fixes bug 29017; bugfix
5822 o Minor bugfixes (testing, backport from 0.4.0.3-alpha):
5823 - Downgrade some LOG_ERR messages in the address/* tests to
5824 warnings. The LOG_ERR messages were occurring when we had no
5825 configured network. We were failing the unit tests, because we
5826 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
5827 29530; bugfix on 0.3.5.8.
5828 - Fix our gcov wrapper script to look for object files at the
5829 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
5831 o Minor bugfixes (testing, backport from 0.4.0.4-rc):
5832 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
5833 recent test-network.sh to use new chutney features in CI. Fixes
5834 bug 29703; bugfix on 0.2.9.1-alpha.
5835 - Fix a test failure on Windows caused by an unexpected "BUG"
5836 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
5839 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
5840 - When testing port rebinding, don't busy-wait for tor to log.
5841 Instead, actually sleep for a short time before polling again.
5842 Also improve the formatting of control commands and log messages.
5843 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5845 o Minor bugfixes (TLS protocol, backport form 0.4.0.4-rc):
5846 - When classifying a client's selection of TLS ciphers, if the
5847 client ciphers are not yet available, do not cache the result.
5848 Previously, we had cached the unavailability of the cipher list
5849 and never looked again, which in turn led us to assume that the
5850 client only supported the ancient V1 link protocol. This, in turn,
5851 was causing Stem integration tests to stall in some cases. Fixes
5852 bug 30021; bugfix on 0.2.4.8-alpha.
5854 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
5855 - Log bugs about the TLS read buffer's length only once, rather than
5856 filling the logs with similar warnings. Fixes bug 31939; bugfix
5859 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
5860 - Always retry v2 single onion service intro and rend circuits with
5861 a 3-hop path. Previously, v2 single onion services used a 3-hop
5862 path when rendezvous circuits were retried after a remote or
5863 delayed failure, but a 1-hop path for immediate retries. Fixes bug
5864 23818; bugfix on 0.2.9.3-alpha.
5865 - Make v3 single onion services fall back to a 3-hop intro, when all
5866 intro points are unreachable via a 1-hop path. Previously, v3
5867 single onion services failed when all intro nodes were unreachable
5868 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
5870 o Minor bugfixes (Windows, CI, backport from 0.4.0.3-alpha):
5871 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
5872 Windows Server 2012 R2 job. The remaining 2 jobs still provide
5873 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
5874 fast_finish, so failed jobs terminate the build immediately. Fixes
5875 bug 29601; bugfix on 0.3.5.4-alpha.
5877 o Documentation (backport from 0.4.2.1-alpha):
5878 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
5879 notice.html so that operators no longer have to host it
5880 themselves. Closes ticket 31089.
5882 o Testing (backport from 0.4.1.2-alpha):
5883 - Specify torrc paths (with empty files) when launching tor in
5884 integration tests; refrain from reading user and system torrcs.
5885 Resolves issue 29702.
5887 o Testing (continuous integration, backport from 0.4.1.1-alpha):
5888 - In Travis, show stem's tor log after failure. Closes ticket 30234.
5890 o Testing (continuous integration, backport from 0.4.1.5):
5891 - In Travis, make stem log a controller trace to the console, and
5892 tail stem's tor log after failure. Closes ticket 30591.
5893 - In Travis, only run the stem tests that use a tor binary. Closes
5896 o Testing (continuous integration, backport from 0.4.2.3-alpha):
5897 - Disable all but one Travis CI macOS build, to mitigate slow
5898 scheduling of Travis macOS jobs. Closes ticket 32177.
5899 - Run the chutney IPv6 networks as part of Travis CI. Closes
5901 - Simplify the Travis CI build matrix, and optimise for build time.
5902 Closes ticket 31859.
5903 - Use Windows Server 2019 instead of Windows Server 2016 in our
5904 Appveyor builds. Closes ticket 32086.
5906 o Testing (continuous integration, backport from 0.4.2.4-rc):
5907 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5908 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5909 until we can fix some Bionic permissions issues (see ticket
5910 32240). Related to ticket 31919.
5911 - Install the mingw OpenSSL package in Appveyor. This makes sure
5912 that the OpenSSL headers and libraries match in Tor's Appveyor
5913 builds. (This bug was triggered by an Appveyor image update.)
5914 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5915 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5917 o Testing (continuous integration, backport from 0.4.2.5):
5918 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
5919 extensions. Also activates clang's -Wtypedef-redefinition warnings.
5920 Build some jobs with -std=gnu99, and some jobs without.
5921 Closes ticket 32500.
5923 Changes in version 0.4.2.4-rc - 2019-11-15
5924 Tor 0.4.2.4-rc is the first release candidate in its series. It fixes
5925 several bugs from earlier versions, including a few that would result in
5926 stack traces or incorrect behavior.
5928 o Minor features (build system):
5929 - Make pkg-config use --prefix when cross-compiling, if
5930 PKG_CONFIG_PATH is not set. Closes ticket 32191.
5932 o Minor features (geoip):
5933 - Update geoip and geoip6 to the November 6 2019 Maxmind GeoLite2
5934 Country database. Closes ticket 32440.
5936 o Minor bugfixes (client, onion service v3):
5937 - Fix a BUG() assertion that occurs within a very small race window
5938 between when a client intro circuit opens and when its descriptor
5939 gets cleaned up from the cache. The circuit is now closed early,
5940 which will trigger a re-fetch of the descriptor and continue the
5941 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
5943 o Minor bugfixes (code quality):
5944 - Fix "make check-includes" so it runs correctly on out-of-tree
5945 builds. Fixes bug 31335; bugfix on 0.3.5.1-alpha.
5947 o Minor bugfixes (configuration):
5948 - Log the option name when skipping an obsolete option. Fixes bug
5949 32295; bugfix on 0.4.2.1-alpha.
5951 o Minor bugfixes (crash):
5952 - When running Tor with an option like --verify-config or
5953 --dump-config that does not start the event loop, avoid crashing
5954 if we try to exit early because of an error. Fixes bug 32407;
5955 bugfix on 0.3.3.1-alpha.
5957 o Minor bugfixes (directory):
5958 - When checking if a directory connection is anonymous, test if the
5959 circuit was marked for close before looking at its channel. This
5960 avoids a BUG() stacktrace if the circuit was previously closed.
5961 Fixes bug 31958; bugfix on 0.4.2.1-alpha.
5963 o Minor bugfixes (shellcheck):
5964 - Fix minor shellcheck errors in the git-*.sh scripts. Fixes bug
5965 32402; bugfix on 0.4.2.1-alpha.
5966 - Start checking most scripts for shellcheck errors again. Fixes bug
5967 32402; bugfix on 0.4.2.1-alpha.
5969 o Testing (continuous integration):
5970 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5971 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5972 until we can fix some Bionic permissions issues (see ticket
5973 32240). Related to ticket 31919.
5974 - Install the mingw OpenSSL package in Appveyor. This makes sure
5975 that the OpenSSL headers and libraries match in Tor's Appveyor
5976 builds. (This bug was triggered by an Appveyor image update.)
5977 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5978 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5981 Changes in version 0.4.2.3-alpha - 2019-10-24
5982 This release fixes several bugs from the previous alpha release, and
5983 from earlier versions of Tor.
5985 o Major bugfixes (relay):
5986 - Relays now respect their AccountingMax bandwidth again. When
5987 relays entered "soft" hibernation (which typically starts when
5988 we've hit 90% of our AccountingMax), we had stopped checking
5989 whether we should enter hard hibernation. Soft hibernation refuses
5990 new connections and new circuits, but the existing circuits can
5991 continue, meaning that relays could have exceeded their configured
5992 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
5994 o Major bugfixes (v3 onion services):
5995 - Onion services now always use the exact number of intro points
5996 configured with the HiddenServiceNumIntroductionPoints option (or
5997 fewer if nodes are excluded). Before, a service could sometimes
5998 pick more intro points than configured. Fixes bug 31548; bugfix
6001 o Minor feature (onion services, control port):
6002 - The ADD_ONION command's keyword "BEST" now defaults to ED25519-V3
6003 (v3) onion services. Previously it defaulted to RSA1024 (v2).
6004 Closes ticket 29669.
6006 o Minor features (testing):
6007 - When running tests that attempt to look up hostnames, replace the
6008 libc name lookup functions with ones that do not actually touch
6009 the network. This way, the tests complete more quickly in the
6010 presence of a slow or missing DNS resolver. Closes ticket 31841.
6012 o Minor features (testing, continuous integration):
6013 - Disable all but one Travis CI macOS build, to mitigate slow
6014 scheduling of Travis macOS jobs. Closes ticket 32177.
6015 - Run the chutney IPv6 networks as part of Travis CI. Closes
6017 - Simplify the Travis CI build matrix, and optimise for build time.
6018 Closes ticket 31859.
6019 - Use Windows Server 2019 instead of Windows Server 2016 in our
6020 Appveyor builds. Closes ticket 32086.
6022 o Minor bugfixes (build system):
6023 - Interpret "--disable-module-dirauth=no" correctly. Fixes bug
6024 32124; bugfix on 0.3.4.1-alpha.
6025 - Interpret "--with-tcmalloc=no" correctly. Fixes bug 32124; bugfix
6027 - Stop failing when jemalloc is requested, but tcmalloc is not
6028 found. Fixes bug 32124; bugfix on 0.3.5.1-alpha.
6029 - When pkg-config is not installed, or a library that depends on
6030 pkg-config is not found, tell the user what to do to fix the
6031 problem. Fixes bug 31922; bugfix on 0.3.1.1-alpha.
6033 o Minor bugfixes (connections):
6034 - Avoid trying to read data from closed connections, which can cause
6035 needless loops in Libevent and infinite loops in Shadow. Fixes bug
6036 30344; bugfix on 0.1.1.1-alpha.
6038 o Minor bugfixes (error handling):
6039 - Always lock the backtrace buffer before it is used. Fixes bug
6040 31734; bugfix on 0.2.5.3-alpha.
6042 o Minor bugfixes (mainloop, periodic events, in-process API):
6043 - Reset the periodic events' "enabled" flag when Tor is shut down
6044 cleanly. Previously, this flag was left on, which caused periodic
6045 events not to be re-enabled when Tor was relaunched in-process
6046 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
6049 o Minor bugfixes (process management):
6050 - Remove overly strict assertions that triggered when a pluggable
6051 transport failed to launch. Fixes bug 31091; bugfix
6053 - Remove an assertion in the Unix process backend. This assertion
6054 would trigger when we failed to find the executable for a child
6055 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
6057 o Minor bugfixes (testing):
6058 - Avoid intermittent test failures due to a test that had relied on
6059 inconsistent timing sources. Fixes bug 31995; bugfix
6061 - When testing port rebinding, don't busy-wait for tor to log.
6062 Instead, actually sleep for a short time before polling again.
6063 Also improve the formatting of control commands and log messages.
6064 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
6066 o Minor bugfixes (tls, logging):
6067 - Log bugs about the TLS read buffer's length only once, rather than
6068 filling the logs with similar warnings. Fixes bug 31939; bugfix
6071 o Minor bugfixes (v3 onion services):
6072 - Fix an implicit conversion from ssize_t to size_t discovered by
6073 Coverity. Fixes bug 31682; bugfix on 0.4.2.1-alpha.
6074 - Fix a memory leak in an unlikely error code path when encoding HS
6075 DoS establish intro extension cell. Fixes bug 32063; bugfix
6077 - When cleaning up intro circuits for a v3 onion service, don't
6078 remove circuits that have an established or pending circuit, even
6079 if they ran out of retries. This way, we don't remove a circuit on
6080 its last retry. Fixes bug 31652; bugfix on 0.3.2.1-alpha.
6083 - Correct the description of "GuardLifetime". Fixes bug 31189;
6084 bugfix on 0.3.0.1-alpha.
6085 - Make clear in the man page, in both the bandwidth section and the
6086 AccountingMax section, that Tor counts in powers of two, not
6087 powers of ten: 1 GByte is 1024*1024*1024 bytes, not one billion
6088 bytes. Resolves ticket 32106.
6091 Changes in version 0.4.2.2-alpha - 2019-10-07
6092 This release fixes several bugs from the previous alpha release, and
6093 from earlier versions. It also includes a change in authorities, so
6094 that they begin to reject the currently unsupported release series.
6096 o Major features (directory authorities):
6097 - Directory authorities now reject relays running all currently
6098 deprecated release series. The currently supported release series
6099 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
6101 o Major bugfixes (embedded Tor):
6102 - Avoid a possible crash when restarting Tor in embedded mode and
6103 enabling a different set of publish/subscribe messages. Fixes bug
6104 31898; bugfix on 0.4.1.1-alpha.
6106 o Major bugfixes (torrc parsing):
6107 - Stop ignoring torrc options after an %include directive, when the
6108 included directory ends with a file that does not contain any
6109 config options (but does contain comments or whitespace). Fixes
6110 bug 31408; bugfix on 0.3.1.1-alpha.
6112 o Minor features (auto-formatting scripts):
6113 - When annotating C macros, never generate a line that our check-
6114 spaces script would reject. Closes ticket 31759.
6115 - When annotating C macros, try to remove cases of double-negation.
6116 Closes ticket 31779.
6118 o Minor features (continuous integration):
6119 - When building on Appveyor and Travis, pass the "-k" flag to make,
6120 so that we are informed of all compilation failures, not just the
6121 first one or two. Closes ticket 31372.
6123 o Minor features (geoip):
6124 - Update geoip and geoip6 to the October 1 2019 Maxmind GeoLite2
6125 Country database. Closes ticket 31931.
6127 o Minor features (maintenance scripts):
6128 - Add a Coccinelle script to detect bugs caused by incrementing or
6129 decrementing a variable inside a call to log_debug(). Since
6130 log_debug() is a macro whose arguments are conditionally
6131 evaluated, it is usually an error to do this. One such bug was
6132 30628, in which SENDME cells were miscounted by a decrement
6133 operator inside a log_debug() call. Closes ticket 30743.
6135 o Minor features (onion services v3):
6136 - Assist users who try to setup v2 client authorization in v3 onion
6137 services by pointing them to the right documentation. Closes
6140 o Minor bugfixes (Appveyor continuous integration):
6141 - Avoid spurious errors when Appveyor CI fails before the install
6142 step. Fixes bug 31884; bugfix on 0.3.4.2-alpha.
6144 o Minor bugfixes (best practices tracker):
6145 - When listing overbroad exceptions, do not also list problems, and
6146 do not list insufficiently broad exceptions. Fixes bug 31338;
6147 bugfix on 0.4.2.1-alpha.
6149 o Minor bugfixes (controller protocol):
6150 - Fix the MAPADDRESS controller command to accept one or more
6151 arguments. Previously, it required two or more arguments, and
6152 ignored the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
6154 o Minor bugfixes (logging):
6155 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
6156 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
6157 - Disable backtrace signal handlers when shutting down tor. Fixes
6158 bug 31614; bugfix on 0.2.5.2-alpha.
6159 - Rate-limit the logging message about the obsolete .exit
6160 notation. Previously, there was no limit on this warning, which
6161 could potentially be triggered many times by a hostile website.
6162 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
6163 - When initialising log domain masks, only set known log domains.
6164 Fixes bug 31854; bugfix on 0.2.1.1-alpha.
6166 o Minor bugfixes (logging, protocol violations):
6167 - Do not log a nonfatal assertion failure when receiving a VERSIONS
6168 cell on a connection using the obsolete v1 link protocol. Log a
6169 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
6171 o Minor bugfixes (modules):
6172 - Explain what the optional Directory Authority module is, and what
6173 happens when it is disabled. Fixes bug 31825; bugfix
6176 o Minor bugfixes (multithreading):
6177 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
6178 31736; bugfix on 0.0.7.
6180 o Minor bugfixes (relay):
6181 - Avoid crashing when starting with a corrupt keys directory where
6182 the old ntor key and the new ntor key are identical. Fixes bug
6183 30916; bugfix on 0.2.4.8-alpha.
6185 o Minor bugfixes (tests, SunOS):
6186 - Avoid a map_anon_nofork test failure due to a signed/unsigned
6187 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
6189 o Code simplification and refactoring:
6190 - Refactor connection_control_process_inbuf() to reduce the size of
6191 a practracker exception. Closes ticket 31840.
6192 - Refactor the microdescs_parse_from_string() function into smaller
6193 pieces, for better comprehensibility. Closes ticket 31675.
6194 - Use SEVERITY_MASK_IDX() to find the LOG_* mask indexes in the unit
6195 tests and fuzzers, rather than using hard-coded values. Closes
6197 - Interface for function `decrypt_desc_layer` cleaned up. Closes
6201 - Document the signal-safe logging behaviour in the tor man page.
6202 Also add some comments to the relevant functions. Closes
6204 - Explain why we can't destroy the backtrace buffer mutex. Explain
6205 why we don't need to destroy the log mutex. Closes ticket 31736.
6206 - The Tor source code repository now includes a (somewhat dated)
6207 description of Tor's modular architecture, in doc/HACKING/design.
6208 This is based on the old "tor-guts.git" repository, which we are
6209 adopting and superseding. Closes ticket 31849.
6212 Changes in version 0.4.1.6 - 2019-09-19
6213 This release backports several bugfixes to improve stability and
6214 correctness. Anyone experiencing build problems or crashes with 0.4.1.5,
6215 or experiencing reliability issues with single onion services, should
6218 o Major bugfixes (crash, Linux, Android, backport from 0.4.2.1-alpha):
6219 - Tolerate systems (including some Android installations) where
6220 madvise and MADV_DONTDUMP are available at build-time, but not at
6221 run time. Previously, these systems would notice a failed syscall
6222 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
6223 - Tolerate systems (including some Linux installations) where
6224 madvise and/or MADV_DONTFORK are available at build-time, but not
6225 at run time. Previously, these systems would notice a failed
6226 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
6228 o Minor features (stem tests, backport from 0.4.2.1-alpha):
6229 - Change "make test-stem" so it only runs the stem tests that use
6230 tor. This change makes test-stem faster and more reliable. Closes
6233 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
6234 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
6235 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
6237 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
6238 - Add more stub functions to fix compilation on Android with link-
6239 time optimization when --disable-module-dirauth is used.
6240 Previously, these compilation settings would make the compiler
6241 look for functions that didn't exist. Fixes bug 31552; bugfix
6243 - Suppress spurious float-conversion warnings from GCC when calling
6244 floating-point classifier functions on FreeBSD. Fixes part of bug
6245 31687; bugfix on 0.3.1.5-alpha.
6247 o Minor bugfixes (controller protocol):
6248 - Fix the MAPADDRESS controller command to accept one or more
6249 arguments. Previously, it required two or more arguments, and ignored
6250 the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
6252 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
6253 - When extracting an IPv6 address from a PF-based proxy, verify that
6254 we are actually configured to receive an IPv6 address, and log an
6255 internal error if not. Fixes part of bug 31687; bugfix
6258 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
6259 - When tor is missing descriptors for some primary entry guards,
6260 make the log message less alarming. It's normal for descriptors to
6261 expire, as long as tor fetches new ones soon after. Fixes bug
6262 31657; bugfix on 0.3.3.1-alpha.
6264 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
6265 - Change log level of message "Hash of session info was not as
6266 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
6269 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
6270 - Correctly exclude a redundant rust build job in Travis. Fixes bug
6271 31463; bugfix on 0.3.5.4-alpha.
6273 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
6274 - Always retry v2 single onion service intro and rend circuits with
6275 a 3-hop path. Previously, v2 single onion services used a 3-hop
6276 path when rendezvous circuits were retried after a remote or
6277 delayed failure, but a 1-hop path for immediate retries. Fixes bug
6278 23818; bugfix on 0.2.9.3-alpha.
6280 o Minor bugfixes (v3 single onion services, backport from 0.4.2.1-alpha):
6281 - Always retry v3 single onion service intro and rend circuits with
6282 a 3-hop path. Previously, v3 single onion services used a 3-hop
6283 path when rend circuits were retried after a remote or delayed
6284 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
6285 bugfix on 0.3.2.1-alpha.
6286 - Make v3 single onion services fall back to a 3-hop intro, when all
6287 intro points are unreachable via a 1-hop path. Previously, v3
6288 single onion services failed when all intro nodes were unreachable
6289 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
6291 o Documentation (backport from 0.4.2.1-alpha):
6292 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
6293 notice.html so that operators no longer have to host it
6294 themselves. Closes ticket 31089.
6297 Changes in version 0.4.2.1-alpha - 2019-09-17
6298 This is the first alpha release in the 0.4.2.x series. It adds new
6299 defenses for denial-of-service attacks against onion services. It also
6300 includes numerous kinds of bugfixes and refactoring to help improve
6301 Tor's stability and ease of development.
6303 o Major features (onion service v3, denial of service):
6304 - Add onion service introduction denial of service defenses. Intro
6305 points can now rate-limit client introduction requests, using
6306 parameters that can be sent by the service within the
6307 ESTABLISH_INTRO cell. If the cell extension for this is not used,
6308 the intro point will honor the consensus parameters. Closes
6311 o Major bugfixes (circuit build, guard):
6312 - When considering upgrading circuits from "waiting for guard" to
6313 "open", always ignore circuits that are marked for close.
6314 Previously we could end up in the situation where a subsystem is
6315 notified of a circuit opening, but the circuit is still marked for
6316 close, leading to undesirable behavior. Fixes bug 30871; bugfix
6319 o Major bugfixes (crash, Linux, Android):
6320 - Tolerate systems (including some Android installations) where
6321 madvise and MADV_DONTDUMP are available at build-time, but not at
6322 run time. Previously, these systems would notice a failed syscall
6323 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
6324 - Tolerate systems (including some Linux installations) where
6325 madvise and/or MADV_DONTFORK are available at build-time, but not
6326 at run time. Previously, these systems would notice a failed
6327 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
6329 o Minor features (best practices tracker):
6330 - Our best-practices tracker now integrates with our include-checker
6331 tool to keep track of how many layering violations we have not yet
6332 fixed. We hope to reduce this number over time to improve Tor's
6333 modularity. Closes ticket 31176.
6334 - Add a TOR_PRACTRACKER_OPTIONS variable for passing arguments to
6335 practracker from the environment. We may want this for continuous
6336 integration. Closes ticket 31309.
6337 - Give a warning rather than an error when a practracker exception
6338 is violated by a small amount, add a --list-overbroad option to
6339 practracker that lists exceptions that are stricter than they need
6340 to be, and provide an environment variable for disabling
6341 practracker. Closes ticket 30752.
6342 - Our best-practices tracker now looks at headers as well as C
6343 files. Closes ticket 31175.
6345 o Minor features (build system):
6346 - Add --disable-manpage and --disable-html-manual options to
6347 configure script. This will enable shortening build times by not
6348 building documentation. Resolves issue 19381.
6350 o Minor features (compilation):
6351 - Log a more useful error message when we are compiling and one of
6352 the compile-time hardening options we have selected can be linked
6353 but not executed. Closes ticket 27530.
6355 o Minor features (configuration):
6356 - The configuration code has been extended to allow splitting
6357 configuration data across multiple objects. Previously, all
6358 configuration data needed to be kept in a single object, which
6359 tended to become bloated. Closes ticket 31240.
6361 o Minor features (continuous integration):
6362 - When running CI builds on Travis, put some random data in
6363 ~/.torrc, to make sure no tests are reading the Tor configuration
6364 file from its default location. Resolves issue 30102.
6366 o Minor features (debugging):
6367 - Log a nonfatal assertion failure if we encounter a configuration
6368 line whose command is "CLEAR" but which has a nonempty value. This
6369 should be impossible, according to the rules of our configuration
6370 line parsing. Closes ticket 31529.
6372 o Minor features (git hooks):
6373 - Our pre-commit git hook now checks for a special file before
6374 running practracker, so that practracker only runs on branches
6375 that are based on master. Since the pre-push hook calls the pre-
6376 commit hook, practracker will also only run before pushes of
6377 branches based on master. Closes ticket 30979.
6379 o Minor features (git scripts):
6380 - Add a "--" command-line argument, to separate git-push-all.sh
6381 script arguments from arguments that are passed through to git
6382 push. Closes ticket 31314.
6383 - Add a -r <remote-name> argument to git-push-all.sh, so the script
6384 can push test branches to a personal remote. Closes ticket 31314.
6385 - Add a -t <test-branch-prefix> argument to git-merge-forward.sh and
6386 git-push-all.sh, which makes these scripts create, merge forward,
6387 and push test branches. Closes ticket 31314.
6388 - Add a -u argument to git-merge-forward.sh, so that the script can
6389 re-use existing test branches after a merge failure and fix.
6390 Closes ticket 31314.
6391 - Add a TOR_GIT_PUSH env var, which sets the default git push
6392 command and arguments for git-push-all.sh. Closes ticket 31314.
6393 - Add a TOR_PUSH_DELAY variable to git-push-all.sh, which makes the
6394 script push master and maint branches with a delay between each
6395 branch. These delays trigger the CI jobs in a set order, which
6396 should show the most likely failures first. Also make pushes
6397 atomic by default, and make the script pass any command-line
6398 arguments to git push. Closes ticket 29879.
6399 - Call the shellcheck script from the pre-commit hook. Closes
6401 - Skip pushing test branches that are the same as a remote
6402 maint/release/master branch in git-push-all.sh by default. Add a
6403 -s argument, so git-push-all.sh can push all test branches. Closes
6406 o Minor features (IPv6, logging):
6407 - Log IPv6 addresses as well as IPv4 addresses when describing
6408 routerinfos, routerstatuses, and nodes. Closes ticket 21003.
6410 o Minor features (onion service v3):
6411 - Do not allow single hop clients to fetch or post an HS descriptor
6412 from an HSDir. Closes ticket 24964.
6414 o Minor features (onion service):
6415 - Disallow single-hop clients at the introduction point. We've
6416 removed Tor2web support a while back and single-hop rendezvous
6417 attempts are blocked at the relays. This change should remove load
6418 off the network from spammy clients. Close ticket 24963.
6420 o Minor features (stem tests):
6421 - Change "make test-stem" so it only runs the stem tests that use
6422 tor. This change makes test-stem faster and more reliable. Closes
6425 o Minor features (testing):
6426 - Add a script to invoke "tor --dump-config" and "tor
6427 --verify-config" with various configuration options, and see
6428 whether tor's resulting configuration or error messages are what
6429 we expect. Use it for integration testing of our +Option and
6430 /Option flags. Closes ticket 31637.
6431 - Improve test coverage for our existing configuration parsing and
6432 management API. Closes ticket 30893.
6433 - Add integration tests to make sure that practracker gives the
6434 outputs we expect. Closes ticket 31477.
6435 - The practracker self-tests are now run as part of the Tor test
6436 suite. Closes ticket 31304.
6438 o Minor features (token bucket):
6439 - Implement a generic token bucket that uses a single counter, for
6440 use in anti-DoS onion service work. Closes ticket 30687.
6442 o Minor bugfixes (best practices tracker):
6443 - Fix a few issues in the best-practices script, including tests,
6444 tab tolerance, error reporting, and directory-exclusion logic.
6445 Fixes bug 29746; bugfix on 0.4.1.1-alpha.
6446 - When running check-best-practices, only consider files in the src
6447 subdirectory. Previously we had recursively considered all
6448 subdirectories, which made us get confused by the temporary
6449 directories made by "make distcheck". Fixes bug 31578; bugfix
6452 o Minor bugfixes (build system):
6453 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
6454 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
6456 o Minor bugfixes (chutney, makefiles, documentation):
6457 - "make test-network-all" now shows the warnings from each test-
6458 network.sh run on the console, so developers see new warnings
6459 early. We've also improved the documentation for this feature, and
6460 renamed a Makefile variable so the code is self-documenting. Fixes
6461 bug 30455; bugfix on 0.3.0.4-rc.
6463 o Minor bugfixes (compilation):
6464 - Add more stub functions to fix compilation on Android with link-
6465 time optimization when --disable-module-dirauth is used.
6466 Previously, these compilation settings would make the compiler
6467 look for functions that didn't exist. Fixes bug 31552; bugfix
6469 - Suppress spurious float-conversion warnings from GCC when calling
6470 floating-point classifier functions on FreeBSD. Fixes part of bug
6471 31687; bugfix on 0.3.1.5-alpha.
6473 o Minor bugfixes (configuration):
6474 - Invalid floating-point values in the configuration file are now
6475 treated as errors in the configuration. Previously, they were
6476 ignored and treated as zero. Fixes bug 31475; bugfix on 0.0.1.
6478 o Minor bugfixes (coverity):
6479 - Add an assertion when parsing a BEGIN cell so that coverity can be
6480 sure that we are not about to dereference a NULL address. Fixes
6481 bug 31026; bugfix on 0.2.4.7-alpha. This is CID 1447296.
6482 - In our siphash implementation, when building for coverity, use
6483 memcpy in place of a switch statement, so that coverity can tell
6484 we are not accessing out-of-bounds memory. Fixes bug 31025; bugfix
6485 on 0.2.8.1-alpha. This is tracked as CID 1447293 and 1447295.
6486 - Fix several coverity warnings from our unit tests. Fixes bug
6487 31030; bugfix on 0.2.4.1-alpha, 0.3.2.1-alpha, and 0.4.0.1-alpha.
6489 o Minor bugfixes (developer tooling):
6490 - Only log git script changes in the post-merge script when the
6491 merge was to the master branch. Fixes bug 31040; bugfix
6494 o Minor bugfixes (directory authorities):
6495 - Return a distinct status when formatting annotations fails. Fixes
6496 bug 30780; bugfix on 0.2.0.8-alpha.
6498 o Minor bugfixes (error handling):
6499 - On abort, try harder to flush the output buffers of log messages.
6500 On some platforms (macOS), log messages could be discarded when
6501 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
6502 - Report the tor version whenever an assertion fails. Previously, we
6503 only reported the Tor version on some crashes, and some non-fatal
6504 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
6505 - When tor aborts due to an error, close log file descriptors before
6506 aborting. Closing the logs makes some OSes flush log file buffers,
6507 rather than deleting buffered log lines. Fixes bug 31594; bugfix
6510 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6):
6511 - When extracting an IPv6 address from a PF-based proxy, verify that
6512 we are actually configured to receive an IPv6 address, and log an
6513 internal error if not. Fixes part of bug 31687; bugfix
6516 o Minor bugfixes (git hooks):
6517 - Remove a duplicate call to practracker from the pre-push hook. The
6518 pre-push hook already calls the pre-commit hook, which calls
6519 practracker. Fixes bug 31462; bugfix on 0.4.1.1-alpha.
6521 o Minor bugfixes (git scripts):
6522 - Stop hard-coding the bash path in the git scripts. Some OSes don't
6523 have bash in /usr/bin, others have an ancient bash at this path.
6524 Fixes bug 30840; bugfix on 0.4.0.1-alpha.
6525 - Stop hard-coding the tor master branch name and worktree path in
6526 the git scripts. Fixes bug 30841; bugfix on 0.4.0.1-alpha.
6527 - Allow git-push-all.sh to be run from any directory. Previously,
6528 the script only worked if run from an upstream worktree directory.
6529 Closes ticket 31678.
6531 o Minor bugfixes (guards):
6532 - When tor is missing descriptors for some primary entry guards,
6533 make the log message less alarming. It's normal for descriptors to
6534 expire, as long as tor fetches new ones soon after. Fixes bug
6535 31657; bugfix on 0.3.3.1-alpha.
6537 o Minor bugfixes (ipv6):
6538 - Check for private IPv6 addresses alongside their IPv4 equivalents
6539 when authorities check descriptors. Previously, we only checked
6540 for private IPv4 addresses. Fixes bug 31088; bugfix on
6541 0.2.3.21-rc. Patch by Neel Chauhan.
6542 - When parsing microdescriptors, we should check the IPv6 exit
6543 policy alongside IPv4. Previously, we checked both exit policies
6544 for only router info structures, while microdescriptors were
6545 IPv4-only. Fixes bug 27284; bugfix on 0.2.3.1-alpha. Patch by
6548 o Minor bugfixes (logging):
6549 - Change log level of message "Hash of session info was not as
6550 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
6552 - Fix a code issue that would have broken our parsing of log domains
6553 as soon as we had 33 of them. Fortunately, we still only have 29.
6554 Fixes bug 31451; bugfix on 0.4.1.4-rc.
6556 o Minor bugfixes (memory management):
6557 - Stop leaking a small amount of memory in nt_service_install(), in
6558 unreachable code. Fixes bug 30799; bugfix on 0.2.0.7-alpha. Patch
6561 o Minor bugfixes (networking, IP addresses):
6562 - When parsing addresses via Tor's internal DNS lookup API, reject
6563 IPv4 addresses in square brackets, and accept IPv6 addresses in
6564 square brackets. This change completes the work started in 23082,
6565 making address parsing consistent between tor's internal DNS
6566 lookup and address parsing APIs. Fixes bug 30721; bugfix
6568 - When parsing addresses via Tor's internal address:port parsing and
6569 DNS lookup APIs, require IPv6 addresses with ports to have square
6570 brackets. But allow IPv6 addresses without ports, whether or not
6571 they have square brackets. Fixes bug 30721; bugfix
6574 o Minor bugfixes (onion service v3):
6575 - When purging the client descriptor cache, close any introduction
6576 point circuits associated with purged cache entries. This avoids
6577 picking those circuits later when connecting to the same
6578 introduction points. Fixes bug 30921; bugfix on 0.3.2.1-alpha.
6580 o Minor bugfixes (onion services):
6581 - In the hs_ident_circuit_t data structure, remove the unused field
6582 circuit_type and the respective argument in hs_ident_circuit_new().
6583 This field was set by clients (for introduction) and services (for
6584 introduction and rendezvous) but was never used afterwards. Fixes
6585 bug 31490; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
6587 o Minor bugfixes (operator tools):
6588 - Make tor-print-ed-signing-cert(1) print certificate expiration
6589 date in RFC 1123 and UNIX timestamp formats, to make output
6590 machine readable. Fixes bug 31012; bugfix on 0.3.5.1-alpha.
6592 o Minor bugfixes (rust):
6593 - Correctly exclude a redundant rust build job in Travis. Fixes bug
6594 31463; bugfix on 0.3.5.4-alpha.
6595 - Raise the minimum rustc version to 1.31.0, as checked by configure
6596 and CI. Fixes bug 31442; bugfix on 0.3.5.4-alpha.
6598 o Minor bugfixes (sendme, code structure):
6599 - Rename the trunnel SENDME file definition from sendme.trunnel to
6600 sendme_cell.trunnel to avoid having twice sendme.{c|h} in the
6601 repository. Fixes bug 30769; bugfix on 0.4.1.1-alpha.
6603 o Minor bugfixes (statistics):
6604 - Stop removing the ed25519 signature if the extra info file is too
6605 big. If the signature data was removed, but the keyword was kept,
6606 this could result in an unparseable extra info file. Fixes bug
6607 30958; bugfix on 0.2.7.2-alpha.
6609 o Minor bugfixes (subsystems):
6610 - Make the subsystem init order match the subsystem module
6611 dependencies. Call windows process security APIs as early as
6612 possible. Initialize logging before network and time, so that
6613 network and time can use logging. Fixes bug 31615; bugfix
6616 o Minor bugfixes (testing):
6617 - Teach the util/socketpair_ersatz test to work correctly when we
6618 have no network stack configured. Fixes bug 30804; bugfix
6621 o Minor bugfixes (v2 single onion services):
6622 - Always retry v2 single onion service intro and rend circuits with
6623 a 3-hop path. Previously, v2 single onion services used a 3-hop
6624 path when rendezvous circuits were retried after a remote or
6625 delayed failure, but a 1-hop path for immediate retries. Fixes bug
6626 23818; bugfix on 0.2.9.3-alpha.
6628 o Minor bugfixes (v3 single onion services):
6629 - Always retry v3 single onion service intro and rend circuits with
6630 a 3-hop path. Previously, v3 single onion services used a 3-hop
6631 path when rend circuits were retried after a remote or delayed
6632 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
6633 bugfix on 0.3.2.1-alpha.
6634 - Make v3 single onion services fall back to a 3-hop intro, when all
6635 intro points are unreachable via a 1-hop path. Previously, v3
6636 single onion services failed when all intro nodes were unreachable
6637 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
6640 - Improve documentation in circuit padding subsystem. Patch by
6641 Tobias Pulls. Closes ticket 31113.
6642 - Include an example usage for IPv6 ORPort in our sample torrc.
6643 Closes ticket 31320; patch from Ali Raheem.
6644 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
6645 notice.html so that operators no longer have to host it
6646 themselves. Closes ticket 31089.
6649 - No longer include recommended package digests in votes as detailed
6650 in proposal 301. The RecommendedPackages torrc option is
6651 deprecated and will no longer have any effect. "package" lines
6652 will still be considered when computing consensuses for consensus
6653 methods that include them. (This change has no effect on the list
6654 of recommended Tor versions, which is still in use.) Closes
6656 - Remove torctl.in from contrib/dist directory. Resolves
6660 - Run shellcheck for all non-third-party shell scripts that are
6661 shipped with Tor. Closes ticket 29533.
6662 - When checking shell scripts, ignore any user-created directories.
6663 Closes ticket 30967.
6665 o Code simplification and refactoring (config handling):
6666 - Extract our variable manipulation code from confparse.c to a new
6667 lower-level typedvar.h module. Closes ticket 30864.
6668 - Lower another layer of object management from confparse.c to a
6669 more general tool. Now typed structure members are accessible via
6670 an abstract type. Implements ticket 30914.
6671 - Move our backend logic for working with configuration and state
6672 files into a lower-level library, since it no longer depends on
6673 any tor-specific functionality. Closes ticket 31626.
6674 - Numerous simplifications in configuration-handling logic: remove
6675 duplicated macro definitions, replace magical names with flags,
6676 and refactor "TestingTorNetwork" to use the same default-option
6677 logic as the rest of Tor. Closes ticket 30935.
6678 - Replace our ad-hoc set of flags for configuration variables and
6679 configuration variable types with fine-grained orthogonal flags
6680 corresponding to the actual behavior we want. Closes ticket 31625.
6682 o Code simplification and refactoring (misc):
6683 - Eliminate some uses of lower-level control reply abstractions,
6684 primarily in the onion_helper functions. Closes ticket 30889.
6685 - Rework bootstrap tracking to use the new publish-subscribe
6686 subsystem. Closes ticket 29976.
6687 - Rewrite format_node_description() and router_get_verbose_nickname()
6688 to use strlcpy() and strlcat(). The previous implementation used
6689 memcpy() and pointer arithmetic, which was error-prone. Closes
6690 ticket 31545. This is CID 1452819.
6691 - Split extrainfo_dump_to_string() into smaller functions. Closes
6693 - Use the ptrdiff_t type consistently for expressing variable
6694 offsets and pointer differences. Previously we incorrectly (but
6695 harmlessly) used int and sometimes off_t for these cases. Closes
6697 - Use the subsystems mechanism to manage the main event loop code.
6698 Closes ticket 30806.
6699 - Various simplifications and minor improvements to the circuit
6700 padding machines. Patch by Tobias Pulls. Closes tickets 31112
6703 o Documentation (hard-coded directories):
6704 - Improve the documentation for the DirAuthority and FallbackDir
6705 torrc options. Closes ticket 30955.
6707 o Documentation (tor.1 man page):
6708 - Fix typo in tor.1 man page: the option is "--help", not "-help".
6709 Fixes bug 31008; bugfix on 0.2.2.9-alpha.
6712 Changes in version 0.4.1.5 - 2019-08-20
6713 This is the first stable release in the 0.4.1.x series. This series
6714 adds experimental circuit-level padding, authenticated SENDME cells to
6715 defend against certain attacks, and several performance improvements
6716 to save on CPU consumption. It fixes bugs in bootstrapping and v3
6717 onion services. It also includes numerous smaller features and
6718 bugfixes on earlier versions.
6720 Per our support policy, we will support the 0.4.1.x series for nine
6721 months, or until three months after the release of a stable 0.4.2.x:
6722 whichever is longer. If you need longer-term support, please stick
6723 with 0.3.5.x, which will we plan to support until Feb 2022.
6725 Below are the changes since 0.4.1.4-rc. For a complete list of changes
6726 since 0.4.0.5, see the ReleaseNotes file.
6728 o Directory authority changes:
6729 - The directory authority "dizum" has a new IP address. Closes
6732 o Minor features (circuit padding logging):
6733 - Demote noisy client-side warn logs about circuit padding to
6734 protocol warnings. Add additional log messages and circuit ID
6735 fields to help with bug 30992 and any other future issues.
6737 o Minor bugfixes (circuit padding negotiation):
6738 - Bump the circuit padding protocol version to explicitly signify
6739 that the HS setup machine support is finalized in 0.4.1.x-stable.
6740 This also means that 0.4.1.x-alpha clients will not negotiate
6741 padding with 0.4.1.x-stable relays, and 0.4.1.x-stable clients
6742 will not negotiate padding with 0.4.1.x-alpha relays (or 0.4.0.x
6743 relays). Fixes bug 31356; bugfix on 0.4.1.1-alpha.
6745 o Minor bugfixes (circuit padding):
6746 - Ignore non-padding cells on padding circuits. This addresses
6747 various warning messages from subsystems that were not expecting
6748 padding circuits. Fixes bug 30942; bugfix on 0.4.1.1-alpha.
6750 o Minor bugfixes (clock skew detection):
6751 - Don't believe clock skew results from NETINFO cells that appear to
6752 arrive before we sent the VERSIONS cells they are responding to.
6753 Previously, we would accept them up to 3 minutes "in the past".
6754 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
6756 o Minor bugfixes (compatibility, standards compliance):
6757 - Fix a bug that would invoke undefined behavior on certain
6758 operating systems when trying to asprintf() a string exactly
6759 INT_MAX bytes long. We don't believe this is exploitable, but it's
6760 better to fix it anyway. Fixes bug 31001; bugfix on 0.2.2.11-alpha.
6761 Found and fixed by Tobias Stoeckmann.
6763 o Minor bugfixes (compilation warning):
6764 - Fix a compilation warning on Windows about casting a function
6765 pointer for GetTickCount64(). Fixes bug 31374; bugfix
6768 o Minor bugfixes (compilation):
6769 - Avoid using labs() on time_t, which can cause compilation warnings
6770 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
6772 o Minor bugfixes (distribution):
6773 - Do not ship any temporary files found in the
6774 scripts/maint/practracker directory. Fixes bug 31311; bugfix
6777 o Testing (continuous integration):
6778 - In Travis, make stem log a controller trace to the console, and
6779 tail stem's tor log after failure. Closes ticket 30591.
6780 - In Travis, only run the stem tests that use a tor binary. Closes
6784 Changes in version 0.4.1.4-rc - 2019-07-25
6785 Tor 0.4.1.4-rc fixes a few bugs from previous versions of Tor, and
6786 updates to a new list of fallback directories. If no new bugs are
6787 found, the next release in the 0.4.1.x serious should be stable.
6789 o Major bugfixes (circuit build, guard):
6790 - When considering upgrading circuits from "waiting for guard" to
6791 "open", always ignore circuits that are marked for close. Otherwise,
6792 we can end up in the situation where a subsystem is notified that
6793 a closing circuit has just opened, leading to undesirable
6794 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
6796 o Minor features (continuous integration):
6797 - Our Travis configuration now uses Chutney to run some network
6798 integration tests automatically. Closes ticket 29280.
6800 o Minor features (fallback directory list):
6801 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
6802 in December 2018 (of which ~122 were still functional), with a
6803 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
6804 in June 2019. Closes ticket 28795.
6806 o Minor bugfixes (circuit padding):
6807 - On relays, properly check that a padding machine is absent before
6808 logging a warning about it being absent. Fixes bug 30649; bugfix
6810 - Add two NULL checks in unreachable places to silence Coverity (CID
6811 144729 and 1447291) and better future-proof ourselves. Fixes bug
6812 31024; bugfix on 0.4.1.1-alpha.
6814 o Minor bugfixes (crash on exit):
6815 - Avoid a set of possible code paths that could try to use freed
6816 memory in routerlist_free() while Tor was exiting. Fixes bug
6817 31003; bugfix on 0.1.2.2-alpha.
6819 o Minor bugfixes (logging):
6820 - Fix a conflict between the flag used for messaging-domain log
6821 messages, and the LD_NO_MOCK testing flag. Fixes bug 31080; bugfix
6824 o Minor bugfixes (memory leaks):
6825 - Fix a trivial memory leak when parsing an invalid value from a
6826 download schedule in the configuration. Fixes bug 30894; bugfix
6829 o Code simplification and refactoring:
6830 - Remove some dead code from circpad_machine_remove_token() to fix
6831 some Coverity warnings (CID 1447298). Fixes bug 31027; bugfix
6835 Changes in version 0.4.1.3-alpha - 2019-06-25
6836 Tor 0.4.1.3-alpha resolves numerous bugs left over from the previous
6837 alpha, most of them from earlier release series.
6839 o Major bugfixes (Onion service reachability):
6840 - Properly clean up the introduction point map when circuits change
6841 purpose from onion service circuits to pathbias, measurement, or
6842 other circuit types. This should fix some service-side instances
6843 of introduction point failure. Fixes bug 29034; bugfix
6846 o Minor features (geoip):
6847 - Update geoip and geoip6 to the June 10 2019 Maxmind GeoLite2
6848 Country database. Closes ticket 30852.
6850 o Minor features (logging):
6851 - Give a more useful assertion failure message if we think we have
6852 minherit() but we fail to make a region non-inheritable. Give a
6853 compile-time warning if our support for minherit() is incomplete.
6854 Closes ticket 30686.
6856 o Minor bugfixes (circuit isolation):
6857 - Fix a logic error that prevented the SessionGroup sub-option from
6858 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
6860 o Minor bugfixes (continuous integration):
6861 - Allow the test-stem job to fail in Travis, because it sometimes
6862 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
6863 - Skip test_rebind on macOS in Travis, because it is unreliable on
6864 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
6865 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
6866 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
6868 o Minor bugfixes (directory authorities):
6869 - Stop crashing after parsing an unknown descriptor purpose
6870 annotation. We think this bug can only be triggered by modifying a
6871 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
6873 o Minor bugfixes (pluggable transports):
6874 - When running as a bridge with pluggable transports, always publish
6875 pluggable transport information in our extrainfo descriptor, even
6876 if ExtraInfoStatistics is 0. This information is needed by
6877 BridgeDB. Fixes bug 30956; bugfix on 0.4.1.1-alpha.
6880 - Mention URLs for Travis/Appveyor/Jenkins in ReleasingTor.md.
6881 Closes ticket 30630.
6884 Changes in version 0.4.1.2-alpha - 2019-06-06
6885 Tor 0.4.1.2-alpha resolves numerous bugs--some of them from the
6886 previous alpha, and some much older. It also contains minor testing
6887 improvements, and an improvement to the security of our authenticated
6888 SENDME implementation.
6890 o Major bugfixes (bridges):
6891 - Consider our directory information to have changed when our list
6892 of bridges changes. Previously, Tor would not re-compute the
6893 status of its directory information when bridges changed, and
6894 therefore would not realize that it was no longer able to build
6895 circuits. Fixes part of bug 29875.
6896 - Do not count previously configured working bridges towards our
6897 total of working bridges. Previously, when Tor's list of bridges
6898 changed, it would think that the old bridges were still usable,
6899 and delay fetching router descriptors for the new ones. Fixes part
6900 of bug 29875; bugfix on 0.3.0.1-alpha.
6902 o Major bugfixes (flow control, SENDME):
6903 - Decrement the stream-level package window after packaging a cell.
6904 Previously, it was done inside a log_debug() call, meaning that if
6905 debug logs were not enabled, the decrement would never happen, and
6906 thus the window would be out of sync with the other end point.
6907 Fixes bug 30628; bugfix on 0.4.1.1-alpha.
6909 o Major bugfixes (onion service reachability):
6910 - Properly clean up the introduction point map and associated state
6911 when circuits change purpose from onion service circuits to
6912 pathbias, measurement, or other circuit types. This may fix some
6913 instances of introduction point failure. Fixes bug 29034; bugfix
6916 o Minor features (authenticated SENDME):
6917 - Ensure that there is enough randomness on every circuit to prevent
6918 an attacker from successfully predicting the hashes they will need
6919 to include in authenticated SENDME cells. At a random interval, if
6920 we have not sent randomness already, we now leave some extra space
6921 at the end of a cell that we can fill with random bytes. Closes
6924 o Minor features (continuous integration):
6925 - When running coverage builds on Travis, we now set
6926 TOR_TEST_RNG_SEED, to avoid RNG-based coverage differences. Part
6929 o Minor features (maintenance):
6930 - Add a new "make autostyle" target that developers can use to apply
6931 all automatic Tor style and consistency conversions to the
6932 codebase. Closes ticket 30539.
6934 o Minor features (testing):
6935 - The circuitpadding tests now use a reproducible RNG implementation,
6936 so that if a test fails, we can learn why. Part of ticket 28878.
6937 - Tor's tests now support an environment variable, TOR_TEST_RNG_SEED,
6938 to set the RNG seed for tests that use a reproducible RNG. Part of
6940 - When running tests in coverage mode, take additional care to make
6941 our coverage deterministic, so that we can accurately track
6942 changes in code coverage. Closes ticket 30519.
6944 o Minor bugfixes (configuration, proxies):
6945 - Fix a bug that prevented us from supporting SOCKS5 proxies that
6946 want authentication along with configured (but unused!)
6947 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
6949 o Minor bugfixes (controller):
6950 - POSTDESCRIPTOR requests should work again. Previously, they were
6951 broken if a "purpose=" flag was specified. Fixes bug 30580; bugfix
6953 - Repair the HSFETCH command so that it works again. Previously, it
6954 expected a body when it shouldn't have. Fixes bug 30646; bugfix
6957 o Minor bugfixes (developer tooling):
6958 - Fix pre-push hook to allow fixup and squash commits when pushing
6959 to non-upstream git remote. Fixes bug 30286; bugfix
6962 o Minor bugfixes (directory authority):
6963 - Move the "bandwidth-file-headers" line in directory authority
6964 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
6967 o Minor bugfixes (NetBSD):
6968 - Fix usage of minherit() on NetBSD and other platforms that define
6969 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
6970 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
6972 o Minor bugfixes (out-of-memory handler):
6973 - When purging the DNS cache because of an out-of-memory condition,
6974 try purging just the older entries at first. Previously, we would
6975 always purge the whole thing. Fixes bug 29617; bugfix
6978 o Minor bugfixes (portability):
6979 - Avoid crashing in our tor_vasprintf() implementation on systems
6980 that define neither vasprintf() nor _vscprintf(). (This bug has
6981 been here long enough that we question whether people are running
6982 Tor on such systems, but we're applying the fix out of caution.)
6983 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
6986 o Minor bugfixes (shutdown, libevent, memory safety):
6987 - Avoid use-after-free bugs when shutting down, by making sure that
6988 we shut down libevent only after shutting down all of its users.
6989 We believe these are harmless in practice, since they only occur
6990 on the shutdown path, and do not involve any attacker-controlled
6991 data. Fixes bug 30629; bugfix on 0.4.1.1-alpha.
6993 o Minor bugfixes (static analysis):
6994 - Fix several spurious Coverity warnings about the unit tests, to
6995 lower our chances of missing real warnings in the future. Fixes
6996 bug 30150; bugfix on 0.3.5.1-alpha and various other Tor versions.
6999 - Specify torrc paths (with empty files) when launching tor in
7000 integration tests; refrain from reading user and system torrcs.
7001 Resolves issue 29702.
7004 Changes in version 0.4.1.1-alpha - 2019-05-22
7005 This is the first alpha in the 0.4.1.x series. It introduces
7006 lightweight circuit padding to make some onion-service circuits harder
7007 to distinguish, includes a new "authenticated SENDME" feature to make
7008 certain denial-of-service attacks more difficult, and improves
7009 performance in several areas.
7011 o Major features (circuit padding):
7012 - Onion service clients now add padding cells at the start of their
7013 INTRODUCE and RENDEZVOUS circuits, to make those circuits' traffic
7014 look more like general purpose Exit traffic. The overhead for this
7015 is 2 extra cells in each direction for RENDEZVOUS circuits, and 1
7016 extra upstream cell and 10 downstream cells for INTRODUCE
7017 circuits. This feature is only enabled when also supported by the
7018 circuit's middle node. (Clients may specify fixed middle nodes
7019 with the MiddleNodes option, and may force-disable this feature
7020 with the CircuitPadding option.) Closes ticket 28634.
7022 o Major features (code organization):
7023 - Tor now includes a generic publish-subscribe message-passing
7024 subsystem that we can use to organize intermodule dependencies. We
7025 hope to use this to reduce dependencies between modules that don't
7026 need to be related, and to generally simplify our codebase. Closes
7029 o Major features (controller protocol):
7030 - Controller commands are now parsed using a generalized parsing
7031 subsystem. Previously, each controller command was responsible for
7032 parsing its own input, which led to strange inconsistencies.
7033 Closes ticket 30091.
7035 o Major features (flow control):
7036 - Implement authenticated SENDMEs as detailed in proposal 289. A
7037 SENDME cell now includes the digest of the traffic that it
7038 acknowledges, so that once an end point receives the SENDME, it
7039 can confirm the other side's knowledge of the previous cells that
7040 were sent, and prevent certain types of denial-of-service attacks.
7041 This behavior is controlled by two new consensus parameters: see
7042 the proposal for more details. Fixes ticket 26288.
7044 o Major features (performance):
7045 - Our node selection algorithm now excludes nodes in linear time.
7046 Previously, the algorithm was quadratic, which could slow down
7047 heavily used onion services. Closes ticket 30307.
7049 o Major features (performance, RNG):
7050 - Tor now constructs a fast secure pseudorandom number generator for
7051 each thread, to use when performance is critical. This PRNG is
7052 based on AES-CTR, using a buffering construction similar to
7053 libottery and the (newer) OpenBSD arc4random() code. It
7054 outperforms OpenSSL 1.1.1a's CSPRNG by roughly a factor of 100 for
7055 small outputs. Although we believe it to be cryptographically
7056 strong, we are only using it when necessary for performance.
7057 Implements tickets 29023 and 29536.
7059 o Major bugfixes (onion service v3):
7060 - Fix an unreachable bug in which an introduction point could try to
7061 send an INTRODUCE_ACK with a status code that Trunnel would refuse
7062 to encode, leading the relay to assert(). We've consolidated the
7063 ABI values into Trunnel now. Fixes bug 30454; bugfix
7065 - Clients can now handle unknown status codes from INTRODUCE_ACK
7066 cells. (The NACK behavior will stay the same.) This will allow us
7067 to extend status codes in the future without breaking the normal
7068 client behavior. Fixes another part of bug 30454; bugfix
7071 o Minor features (circuit padding):
7072 - We now use a fast PRNG when scheduling circuit padding. Part of
7074 - Allow the padding machine designer to pick the edges of their
7075 histogram instead of trying to compute them automatically using an
7076 exponential formula. Resolves some undefined behavior in the case
7077 of small histograms and allows greater flexibility on machine
7078 design. Closes ticket 29298; bugfix on 0.4.0.1-alpha.
7079 - Allow circuit padding machines to hold a circuit open until they
7080 are done padding it. Closes ticket 28780.
7082 o Minor features (compile-time modules):
7083 - Add a "--list-modules" command to print a list of which compile-
7084 time modules are enabled. Closes ticket 30452.
7086 o Minor features (continuous integration):
7087 - Remove sudo configuration lines from .travis.yml as they are no
7088 longer needed with current Travis build environment. Resolves
7090 - In Travis, show stem's tor log after failure. Closes ticket 30234.
7092 o Minor features (controller):
7093 - Add onion service version 3 support to the HSFETCH command.
7094 Previously, only version 2 onion services were supported. Closes
7095 ticket 25417. Patch by Neel Chauhan.
7097 o Minor features (debugging):
7098 - Introduce tor_assertf() and tor_assertf_nonfatal() to enable
7099 logging of additional information during assert failure. Now we
7100 can use format strings to include information for trouble
7101 shooting. Resolves ticket 29662.
7103 o Minor features (defense in depth):
7104 - In smartlist_remove_keeporder(), set unused pointers to NULL, in
7105 case a bug causes them to be used later. Closes ticket 30176.
7106 Patch from Tobias Stoeckmann.
7107 - Tor now uses a cryptographically strong PRNG even for decisions
7108 that we do not believe are security-sensitive. Previously, for
7109 performance reasons, we had used a trivially predictable linear
7110 congruential generator algorithm for certain load-balancing and
7111 statistical sampling decisions. Now we use our fast RNG in those
7112 cases. Closes ticket 29542.
7114 o Minor features (developer tools):
7115 - Tor's "practracker" test script now checks for files and functions
7116 that seem too long and complicated. Existing overlong functions
7117 and files are accepted for now, but should eventually be
7118 refactored. Closes ticket 29221.
7119 - Add some scripts used for git maintenance to scripts/git. Closes
7121 - Call practracker from pre-push and pre-commit git hooks to let
7122 developers know if they made any code style violations. Closes
7124 - Add a script to check that each header has a well-formed and
7125 unique guard macro. Closes ticket 29756.
7127 o Minor features (geoip):
7128 - Update geoip and geoip6 to the May 13 2019 Maxmind GeoLite2
7129 Country database. Closes ticket 30522.
7131 o Minor features (HTTP tunnel):
7132 - Return an informative web page when the HTTPTunnelPort is used as
7133 an HTTP proxy. Closes ticket 27821, patch by "eighthave".
7135 o Minor features (IPv6, v3 onion services):
7136 - Make v3 onion services put IPv6 addresses in service descriptors.
7137 Before this change, service descriptors only contained IPv4
7138 addresses. Implements 26992.
7140 o Minor features (modularity):
7141 - The "--disable-module-dirauth" compile-time option now disables
7142 even more dirauth-only code. Closes ticket 30345.
7144 o Minor features (performance):
7145 - Use OpenSSL's implementations of SHA3 when available (in OpenSSL
7146 1.1.1 and later), since they tend to be faster than tiny-keccak.
7147 Closes ticket 28837.
7149 o Minor features (testing):
7150 - Tor's unit test code now contains helper functions to replace the
7151 PRNG with a deterministic or reproducible version for testing.
7152 Previously, various tests implemented this in various ways.
7153 Implements ticket 29732.
7154 - We now have a script, cov-test-determinism.sh, to identify places
7155 where our unit test coverage has become nondeterministic. Closes
7157 - Check that representative subsets of values of `int` and `unsigned
7158 int` can be represented by `void *`. Resolves issue 29537.
7160 o Minor bugfixes (bridge authority):
7161 - Bridge authorities now set bridges as running or non-running when
7162 about to dump their status to a file. Previously, they set bridges
7163 as running in response to a GETINFO command, but those shouldn't
7164 modify data structures. Fixes bug 24490; bugfix on 0.2.0.13-alpha.
7165 Patch by Neel Chauhan.
7167 o Minor bugfixes (channel padding statistics):
7168 - Channel padding write totals and padding-enabled totals are now
7169 counted properly in relay extrainfo descriptors. Fixes bug 29231;
7170 bugfix on 0.3.1.1-alpha.
7172 o Minor bugfixes (circuit padding):
7173 - Add a "CircuitPadding" torrc option to disable circuit padding.
7174 Fixes bug 28693; bugfix on 0.4.0.1-alpha.
7175 - Allow circuit padding machines to specify that they do not
7176 contribute much overhead, and provide consensus flags and torrc
7177 options to force clients to only use these low overhead machines.
7178 Fixes bug 29203; bugfix on 0.4.0.1-alpha.
7179 - Provide a consensus parameter to fully disable circuit padding, to
7180 be used in emergency network overload situations. Fixes bug 30173;
7181 bugfix on 0.4.0.1-alpha.
7182 - The circuit padding subsystem will no longer schedule padding if
7183 dormant mode is enabled. Fixes bug 28636; bugfix on 0.4.0.1-alpha.
7184 - Inspect a circuit-level cell queue before sending padding, to
7185 avoid sending padding while too much data is already queued. Fixes
7186 bug 29204; bugfix on 0.4.0.1-alpha.
7187 - Avoid calling monotime_absolute_usec() in circuit padding machines
7188 that do not use token removal or circuit RTT estimation. Fixes bug
7189 29085; bugfix on 0.4.0.1-alpha.
7191 o Minor bugfixes (compilation, unusual configurations):
7192 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
7193 due to missing declarations of abort(), and prevent other such
7194 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
7196 o Minor bugfixes (controller protocol):
7197 - Teach the controller parser to distinguish an object preceded by
7198 an argument list from one without. Previously, it couldn't
7199 distinguish an argument list from the first line of a multiline
7200 object. Fixes bug 29984; bugfix on 0.2.3.8-alpha.
7202 o Minor bugfixes (directory authority, ipv6):
7203 - Directory authorities with IPv6 support now always mark themselves
7204 as reachable via IPv6. Fixes bug 24338; bugfix on 0.2.4.1-alpha.
7205 Patch by Neel Chauhan.
7207 o Minor bugfixes (documentation):
7208 - Improve the documentation for using MapAddress with ".exit". Fixes
7209 bug 30109; bugfix on 0.1.0.1-rc.
7210 - Improve the monotonic time module and function documentation to
7211 explain what "monotonic" actually means, and document some results
7212 that have surprised people. Fixes bug 29640; bugfix
7214 - Use proper formatting when providing an example on quoting options
7215 that contain whitespace. Fixes bug 29635; bugfix on 0.2.3.18-rc.
7217 o Minor bugfixes (logging):
7218 - Do not log a warning when running with an OpenSSL version other
7219 than the one Tor was compiled with, if the two versions should be
7220 compatible. Previously, we would warn whenever the version was
7221 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
7222 - Warn operators when the MyFamily option is set but ContactInfo is
7223 missing, as the latter should be set too. Fixes bug 25110; bugfix
7226 o Minor bugfixes (memory leak):
7227 - Avoid a minor memory leak that could occur on relays when failing
7228 to create a "keys" directory. Fixes bug 30148; bugfix
7231 o Minor bugfixes (onion services):
7232 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
7233 implementation) when failing to load an onion service client
7234 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
7235 - When refusing to launch a controller's HSFETCH request because of
7236 rate-limiting, respond to the controller with a new response,
7237 "QUERY_RATE_LIMITED". Previously, we would log QUERY_NO_HSDIR for
7238 this case. Fixes bug 28269; bugfix on 0.3.1.1-alpha. Patch by
7240 - When relaunching a circuit to a rendezvous service, mark the
7241 circuit as needing high-uptime routers as appropriate. Fixes bug
7242 17357; bugfix on 0.1.0.1-rc. Patch by Neel Chauhan.
7243 - Stop ignoring IPv6 link specifiers sent to v3 onion services.
7244 (IPv6 support for v3 onion services is still incomplete: see
7245 ticket 23493 for details.) Fixes bug 23588; bugfix on
7246 0.3.2.1-alpha. Patch by Neel Chauhan.
7248 o Minor bugfixes (onion services, performance):
7249 - When building circuits to onion services, call tor_addr_parse()
7250 less often. Previously, we called tor_addr_parse() in
7251 circuit_is_acceptable() even if its output wasn't used. This
7252 change should improve performance when building circuits. Fixes
7253 bug 22210; bugfix on 0.2.8.12. Patch by Neel Chauhan.
7255 o Minor bugfixes (performance):
7256 - When checking whether a node is a bridge, use a fast check to make
7257 sure that its identity is set. Previously, we used a constant-time
7258 check, which is not necessary in this case. Fixes bug 30308;
7259 bugfix on 0.3.5.1-alpha.
7261 o Minor bugfixes (pluggable transports):
7262 - Tor now sets TOR_PT_EXIT_ON_STDIN_CLOSE=1 for client transports as
7263 well as servers. Fixes bug 25614; bugfix on 0.2.7.1-alpha.
7265 o Minor bugfixes (probability distributions):
7266 - Refactor and improve parts of the probability distribution code
7267 that made Coverity complain. Fixes bug 29805; bugfix
7270 o Minor bugfixes (python):
7271 - Stop assuming that /usr/bin/python3 exists. For scripts that work
7272 with python2, use /usr/bin/python. Otherwise, use /usr/bin/env
7273 python3. Fixes bug 29913; bugfix on 0.2.5.3-alpha.
7275 o Minor bugfixes (relay):
7276 - When running as a relay, if IPv6Exit is set to 1 while ExitRelay
7277 is auto, act as if ExitRelay is 1. Previously, we would ignore
7278 IPv6Exit if ExitRelay was 0 or auto. Fixes bug 29613; bugfix on
7279 0.3.5.1-alpha. Patch by Neel Chauhan.
7281 o Minor bugfixes (stats):
7282 - When ExtraInfoStatistics is 0, stop including bandwidth usage
7283 statistics, GeoIPFile hashes, ServerTransportPlugin lines, and
7284 bridge statistics by country in extra-info documents. Fixes bug
7285 29018; bugfix on 0.2.4.1-alpha.
7287 o Minor bugfixes (testing):
7288 - Call setrlimit() to disable core dumps in test_bt_cl.c. Previously
7289 we used `ulimit -c` in test_bt.sh, which violates POSIX shell
7290 compatibility. Fixes bug 29061; bugfix on 0.3.5.1-alpha.
7291 - Fix some incorrect code in the v3 onion service unit tests. Fixes
7292 bug 29243; bugfix on 0.3.2.1-alpha.
7293 - In the "routerkeys/*" tests, check the return values of mkdir()
7294 for possible failures. Fixes bug 29939; bugfix on 0.2.7.2-alpha.
7295 Found by Coverity as CID 1444254.
7296 - Split test_utils_general() into several smaller test functions.
7297 This makes it easier to perform resource deallocation on assert
7298 failure, and fixes Coverity warnings CID 1444117 and CID 1444118.
7299 Fixes bug 29823; bugfix on 0.2.9.1-alpha.
7301 o Minor bugfixes (tor-resolve):
7302 - Fix a memory leak in tor-resolve that could happen if Tor gave it
7303 a malformed SOCKS response. (Memory leaks in tor-resolve don't
7304 actually matter, but it's good to fix them anyway.) Fixes bug
7305 30151; bugfix on 0.4.0.1-alpha.
7307 o Code simplification and refactoring:
7308 - Abstract out the low-level formatting of replies on the control
7309 port. Implements ticket 30007.
7310 - Add several assertions in an attempt to fix some Coverity
7311 warnings. Closes ticket 30149.
7312 - Introduce a connection_dir_buf_add() helper function that checks
7313 for compress_state of dir_connection_t and automatically writes a
7314 string to directory connection with or without compression.
7315 Resolves issue 28816.
7316 - Make the base32_decode() API return the number of bytes written,
7317 for consistency with base64_decode(). Closes ticket 28913.
7318 - Move most relay-only periodic events out of mainloop.c into the
7319 relay subsystem. Closes ticket 30414.
7320 - Refactor and encapsulate parts of the codebase that manipulate
7321 crypt_path_t objects. Resolves issue 30236.
7322 - Refactor several places in our code that Coverity incorrectly
7323 believed might have memory leaks. Closes ticket 30147.
7324 - Remove redundant return values in crypto_format, and the
7325 associated return value checks elsewhere in the code. Make the
7326 implementations in crypto_format consistent, and remove redundant
7327 code. Resolves ticket 29660.
7328 - Rename tor_mem_is_zero() to fast_mem_is_zero(), to emphasize that
7329 it is not a constant-time function. Closes ticket 30309.
7330 - Replace hs_desc_link_specifier_t with link_specifier_t, and remove
7331 all hs_desc_link_specifier_t-specific code. Fixes bug 22781;
7332 bugfix on 0.3.2.1-alpha.
7333 - Simplify v3 onion service link specifier handling code. Fixes bug
7334 23576; bugfix on 0.3.2.1-alpha.
7335 - Split crypto_digest.c into NSS code, OpenSSL code, and shared
7336 code. Resolves ticket 29108.
7337 - Split control.c into several submodules, in preparation for
7338 distributing its current responsibilities throughout the codebase.
7339 Closes ticket 29894.
7340 - Start to move responsibility for knowing about periodic events to
7341 the appropriate subsystems, so that the mainloop doesn't need to
7342 know all the periodic events in the rest of the codebase.
7343 Implements tickets 30293 and 30294.
7346 - Document how to find git commits and tags for bug fixes in
7347 CodingStandards.md. Update some file documentation. Closes
7351 - Remove the linux-tor-prio.sh script from contrib/operator-tools
7352 directory. Resolves issue 29434.
7353 - Remove the obsolete OpenSUSE initscript. Resolves issue 30076.
7354 - Remove the obsolete script at contrib/dist/tor.sh.in. Resolves
7357 o Code simplification and refactoring (shell scripts):
7358 - Clean up many of our shell scripts to fix shellcheck warnings.
7359 These include autogen.sh (ticket 26069), test_keygen.sh (ticket
7360 29062), test_switch_id.sh (ticket 29065), test_rebind.sh (ticket
7361 29063), src/test/fuzz/minimize.sh (ticket 30079), test_rust.sh
7362 (ticket 29064), torify (ticket 29070), asciidoc-helper.sh (29926),
7363 fuzz_multi.sh (30077), fuzz_static_testcases.sh (ticket 29059),
7364 nagios-check-tor-authority-cert (ticket 29071),
7365 src/test/fuzz/fixup_filenames.sh (ticket 30078), test-network.sh
7366 (ticket 29060), test_key_expiration.sh (ticket 30002),
7367 zero_length_keys.sh (ticket 29068), and test_workqueue_*.sh
7370 o Testing (chutney):
7371 - In "make test-network-all", test IPv6-only v3 single onion
7372 services, using the chutney network single-onion-v23-ipv6-md.
7373 Closes ticket 27251.
7376 Changes in version 0.4.0.5 - 2019-05-02
7377 This is the first stable release in the 0.4.0.x series. It contains
7378 improvements for power management and bootstrap reporting, as well as
7379 preliminary backend support for circuit padding to prevent some kinds
7380 of traffic analysis. It also continues our work in refactoring Tor for
7381 long-term maintainability.
7383 Per our support policy, we will support the 0.4.0.x series for nine
7384 months, or until three months after the release of a stable 0.4.1.x:
7385 whichever is longer. If you need longer-term support, please stick
7386 with 0.3.5.x, which will we plan to support until Feb 2022.
7388 Below are the changes since 0.4.0.4-rc. For a complete list of changes
7389 since 0.3.5.7, see the ReleaseNotes file.
7391 o Minor features (continuous integration):
7392 - In Travis, tell timelimit to use stem's backtrace signals, and
7393 launch python directly from timelimit, so python receives the
7394 signals from timelimit, rather than make. Closes ticket 30117.
7396 o Minor features (diagnostic):
7397 - Add more diagnostic log messages in an attempt to solve the issue
7398 of NUL bytes appearing in a microdescriptor cache. Related to
7401 o Minor features (testing):
7402 - Use the approx_time() function when setting the "Expires" header
7403 in directory replies, to make them more testable. Needed for
7406 o Minor bugfixes (rust):
7407 - Abort on panic in all build profiles, instead of potentially
7408 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
7410 o Minor bugfixes (shellcheck):
7411 - Look for scripts in their correct locations during "make
7412 shellcheck". Previously we had looked in the wrong place during
7413 out-of-tree builds. Fixes bug 30263; bugfix on 0.4.0.1-alpha.
7415 o Minor bugfixes (testing):
7416 - Check the time in the "Expires" header using approx_time(). Fixes
7417 bug 30001; bugfix on 0.4.0.4-rc.
7419 o Minor bugfixes (UI):
7420 - Lower log level of unlink() errors during bootstrap. Fixes bug
7421 29930; bugfix on 0.4.0.1-alpha.
7424 Changes in version 0.4.0.4-rc - 2019-04-11
7425 Tor 0.4.0.4-rc is the first release candidate in its series; it fixes
7426 several bugs from earlier versions, including some that had affected
7427 stability, and one that prevented relays from working with NSS.
7429 o Major bugfixes (NSS, relay):
7430 - When running with NSS, disable TLS 1.2 ciphersuites that use
7431 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
7432 these ciphersuites don't work -- which caused relays to fail to
7433 handshake with one another when these ciphersuites were enabled.
7434 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
7436 o Minor features (bandwidth authority):
7437 - Make bandwidth authorities ignore relays that are reported in the
7438 bandwidth file with the flag "vote=0". This change allows us to
7439 report unmeasured relays for diagnostic reasons without including
7440 their bandwidth in the bandwidth authorities' vote. Closes
7442 - When a directory authority is using a bandwidth file to obtain the
7443 bandwidth values that will be included in the next vote, serve
7444 this bandwidth file at /tor/status-vote/next/bandwidth. Closes
7447 o Minor features (circuit padding):
7448 - Stop warning about undefined behavior in the probability
7449 distribution tests. Float division by zero may technically be
7450 undefined behavior in C, but it's well defined in IEEE 754.
7451 Partial backport of 29298. Closes ticket 29527; bugfix
7454 o Minor features (continuous integration):
7455 - On Travis Rust builds, cleanup Rust registry and refrain from
7456 caching the "target/" directory to speed up builds. Resolves
7459 o Minor features (dormant mode):
7460 - Add a DormantCanceledByStartup option to tell Tor that it should
7461 treat a startup event as cancelling any previous dormant state.
7462 Integrators should use this option with caution: it should only be
7463 used if Tor is being started because of something that the user
7464 did, and not if Tor is being automatically started in the
7465 background. Closes ticket 29357.
7467 o Minor features (geoip):
7468 - Update geoip and geoip6 to the April 2 2019 Maxmind GeoLite2
7469 Country database. Closes ticket 29992.
7471 o Minor features (NSS, diagnostic):
7472 - Try to log an error from NSS (if there is any) and a more useful
7473 description of our situation if we are using NSS and a call to
7474 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
7476 o Minor bugfixes (security):
7477 - Fix a potential double free bug when reading huge bandwidth files.
7478 The issue is not exploitable in the current Tor network because
7479 the vulnerable code is only reached when directory authorities
7480 read bandwidth files, but bandwidth files come from a trusted
7481 source (usually the authorities themselves). Furthermore, the
7482 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
7483 which are not used by any of the current authorities. Fixes bug
7484 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
7486 - Verify in more places that we are not about to create a buffer
7487 with more than INT_MAX bytes, to avoid possible OOB access in the
7488 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
7489 fixed by Tobias Stoeckmann.
7491 o Minor bugfix (continuous integration):
7492 - Reset coverage state on disk after Travis CI has finished. This
7493 should prevent future coverage merge errors from causing the test
7494 suite for the "process" subsystem to fail. The process subsystem
7495 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
7497 - Terminate test-stem if it takes more than 9.5 minutes to run.
7498 (Travis terminates the job after 10 minutes of no output.)
7499 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
7501 o Minor bugfixes (bootstrap reporting):
7502 - During bootstrap reporting, correctly distinguish pluggable
7503 transports from plain proxies. Fixes bug 28925; bugfix
7506 o Minor bugfixes (C correctness):
7507 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
7508 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
7511 o Minor bugfixes (circuitpadding testing):
7512 - Minor tweaks to avoid rare test failures related to timers and
7513 monotonic time. Fixes bug 29500; bugfix on 0.4.0.1-alpha.
7515 o Minor bugfixes (directory authorities):
7516 - Actually include the bandwidth-file-digest line in directory
7517 authority votes. Fixes bug 29959; bugfix on 0.4.0.2-alpha.
7519 o Minor bugfixes (logging):
7520 - On Windows, when errors cause us to reload a consensus from disk,
7521 tell the user that we are retrying at log level "notice".
7522 Previously we only logged this information at "info", which was
7523 confusing because the errors themselves were logged at "warning".
7524 Improves previous fix for 28614. Fixes bug 30004; bugfix
7527 o Minor bugfixes (pluggable transports):
7528 - Restore old behavior when it comes to discovering the path of a
7529 given Pluggable Transport executable file. A change in
7530 0.4.0.1-alpha had broken this behavior on paths containing a
7531 space. Fixes bug 29874; bugfix on 0.4.0.1-alpha.
7533 o Minor bugfixes (testing):
7534 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
7535 recent test-network.sh to use new chutney features in CI. Fixes
7536 bug 29703; bugfix on 0.2.9.1-alpha.
7537 - Fix a test failure on Windows caused by an unexpected "BUG"
7538 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
7541 o Minor bugfixes (TLS protocol):
7542 - When classifying a client's selection of TLS ciphers, if the
7543 client ciphers are not yet available, do not cache the result.
7544 Previously, we had cached the unavailability of the cipher list
7545 and never looked again, which in turn led us to assume that the
7546 client only supported the ancient V1 link protocol. This, in turn,
7547 was causing Stem integration tests to stall in some cases. Fixes
7548 bug 30021; bugfix on 0.2.4.8-alpha.
7550 o Code simplification and refactoring:
7551 - Introduce a connection_dir_buf_add() helper function that detects
7552 whether compression is in use, and adds a string accordingly.
7553 Resolves issue 28816.
7554 - Refactor handle_get_next_bandwidth() to use
7555 connection_dir_buf_add(). Implements ticket 29897.
7558 - Clarify that Tor performs stream isolation among *Port listeners
7559 by default. Resolves issue 29121.
7562 Changes in version 0.4.0.3-alpha - 2019-03-22
7563 Tor 0.4.0.3-alpha is the third in its series; it fixes several small
7564 bugs from earlier versions.
7566 o Minor features (address selection):
7567 - Treat the subnet 100.64.0.0/10 as public for some purposes;
7568 private for others. This subnet is the RFC 6598 (Carrier Grade
7569 NAT) IP range, and is deployed by many ISPs as an alternative to
7570 RFC 1918 that does not break existing internal networks. Tor now
7571 blocks SOCKS and control ports on these addresses and warns users
7572 if client ports or ExtORPorts are listening on a RFC 6598 address.
7573 Closes ticket 28525. Patch by Neel Chauhan.
7575 o Minor features (geoip):
7576 - Update geoip and geoip6 to the March 4 2019 Maxmind GeoLite2
7577 Country database. Closes ticket 29666.
7579 o Minor bugfixes (circuitpadding):
7580 - Inspect the circuit-level cell queue before sending padding, to
7581 avoid sending padding when too much data is queued. Fixes bug
7582 29204; bugfix on 0.4.0.1-alpha.
7584 o Minor bugfixes (logging):
7585 - Correct a misleading error message when IPv4Only or IPv6Only is
7586 used but the resolved address can not be interpreted as an address
7587 of the specified IP version. Fixes bug 13221; bugfix on
7588 0.2.3.9-alpha. Patch from Kris Katterjohn.
7589 - Log the correct port number for listening sockets when "auto" is
7590 used to let Tor pick the port number. Previously, port 0 was
7591 logged instead of the actual port number. Fixes bug 29144; bugfix
7592 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
7593 - Stop logging a BUG() warning when Tor is waiting for exit
7594 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
7596 o Minor bugfixes (memory management):
7597 - Refactor the shared random state's memory management so that it
7598 actually takes ownership of the shared random value pointers.
7599 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
7601 o Minor bugfixes (memory management, testing):
7602 - Stop leaking parts of the shared random state in the shared-random
7603 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
7605 o Minor bugfixes (pluggable transports):
7606 - Fix an assertion failure crash bug when a pluggable transport is
7607 terminated during the bootstrap phase. Fixes bug 29562; bugfix
7610 o Minor bugfixes (Rust, protover):
7611 - Add a missing "Padding" value to the Rust implementation of
7612 protover. Fixes bug 29631; bugfix on 0.4.0.1-alpha.
7614 o Minor bugfixes (single onion services):
7615 - Allow connections to single onion services to remain idle without
7616 being disconnected. Previously, relays acting as rendezvous points
7617 for single onion services were mistakenly closing idle rendezvous
7618 circuits after 60 seconds, thinking that they were unused
7619 directory-fetching circuits that had served their purpose. Fixes
7620 bug 29665; bugfix on 0.2.1.26.
7622 o Minor bugfixes (stats):
7623 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
7624 relay and bridge extra-info documents. Fixes bug 29017; bugfix
7627 o Minor bugfixes (testing):
7628 - Downgrade some LOG_ERR messages in the address/* tests to
7629 warnings. The LOG_ERR messages were occurring when we had no
7630 configured network. We were failing the unit tests, because we
7631 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
7632 29530; bugfix on 0.3.5.8.
7633 - Fix our gcov wrapper script to look for object files at the
7634 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
7635 - Decrease the false positive rate of stochastic probability
7636 distribution tests. Fixes bug 29693; bugfix on 0.4.0.1-alpha.
7638 o Minor bugfixes (Windows, CI):
7639 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
7640 Windows Server 2012 R2 job. The remaining 2 jobs still provide
7641 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
7642 fast_finish, so failed jobs terminate the build immediately. Fixes
7643 bug 29601; bugfix on 0.3.5.4-alpha.
7646 Changes in version 0.3.5.8 - 2019-02-21
7647 Tor 0.3.5.8 backports several fixes from later releases, including fixes
7648 for an annoying SOCKS-parsing bug that affected users in earlier 0.3.5.x
7651 It also includes a fix for a medium-severity security bug affecting Tor
7652 0.3.2.1-alpha and later. All Tor instances running an affected release
7653 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7655 o Major bugfixes (cell scheduler, KIST, security):
7656 - Make KIST consider the outbuf length when computing what it can
7657 put in the outbuf. Previously, KIST acted as though the outbuf
7658 were empty, which could lead to the outbuf becoming too full. It
7659 is possible that an attacker could exploit this bug to cause a Tor
7660 client or relay to run out of memory and crash. Fixes bug 29168;
7661 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7662 TROVE-2019-001 and CVE-2019-8955.
7664 o Major bugfixes (networking, backport from 0.4.0.2-alpha):
7665 - Gracefully handle empty username/password fields in SOCKS5
7666 username/password auth message and allow SOCKS5 handshake to
7667 continue. Previously, we had rejected these handshakes, breaking
7668 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
7670 o Minor features (compilation, backport from 0.4.0.2-alpha):
7671 - Compile correctly when OpenSSL is built with engine support
7672 disabled, or with deprecated APIs disabled. Closes ticket 29026.
7673 Patches from "Mangix".
7675 o Minor features (geoip):
7676 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7677 Country database. Closes ticket 29478.
7679 o Minor features (testing, backport from 0.4.0.2-alpha):
7680 - Treat all unexpected ERR and BUG messages as test failures. Closes
7683 o Minor bugfixes (onion service v3, client, backport from 0.4.0.1-alpha):
7684 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
7685 connection waiting for a descriptor that we actually have in the
7686 cache. It turns out that this can actually happen, though it is
7687 rare. Now, tor will recover and retry the descriptor. Fixes bug
7688 28669; bugfix on 0.3.2.4-alpha.
7690 o Minor bugfixes (IPv6, backport from 0.4.0.1-alpha):
7691 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
7692 IPv6 socket was bound using an address family of AF_INET instead
7693 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
7696 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
7697 - Update Cargo.lock file to match the version made by the latest
7698 version of Rust, so that "make distcheck" will pass again. Fixes
7699 bug 29244; bugfix on 0.3.3.4-alpha.
7701 o Minor bugfixes (client, clock skew, backport from 0.4.0.1-alpha):
7702 - Select guards even if the consensus has expired, as long as the
7703 consensus is still reasonably live. Fixes bug 24661; bugfix
7706 o Minor bugfixes (compilation, backport from 0.4.0.1-alpha):
7707 - Compile correctly on OpenBSD; previously, we were missing some
7708 headers required in order to detect it properly. Fixes bug 28938;
7709 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
7711 o Minor bugfixes (documentation, backport from 0.4.0.2-alpha):
7712 - Describe the contents of the v3 onion service client authorization
7713 files correctly: They hold public keys, not private keys. Fixes
7714 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
7716 o Minor bugfixes (logging, backport from 0.4.0.1-alpha):
7717 - Rework rep_hist_log_link_protocol_counts() to iterate through all
7718 link protocol versions when logging incoming/outgoing connection
7719 counts. Tor no longer skips version 5, and we won't have to
7720 remember to update this function when new link protocol version is
7721 developed. Fixes bug 28920; bugfix on 0.2.6.10.
7723 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
7724 - Log more information at "warning" level when unable to read a
7725 private key; log more information at "info" level when unable to
7726 read a public key. We had warnings here before, but they were lost
7727 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
7729 o Minor bugfixes (misc, backport from 0.4.0.2-alpha):
7730 - The amount of total available physical memory is now determined
7731 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
7732 when it is defined and a 64-bit variant is not available. Fixes
7733 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
7735 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
7736 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
7737 than one private key for a hidden service. Fixes bug 29040; bugfix
7739 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
7740 "debug" level. Tor used to log it as a warning, which caused very
7741 long log lines to appear for some users. Fixes bug 29135; bugfix
7743 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7744 as a warning. Instead, log it as a protocol warning, because there
7745 is nothing that relay operators can do to fix it. Fixes bug 29029;
7746 bugfix on 0.2.5.7-rc.
7748 o Minor bugfixes (tests, directory clients, backport from 0.4.0.1-alpha):
7749 - Mark outdated dirservers when Tor only has a reasonably live
7750 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
7752 o Minor bugfixes (tests, backport from 0.4.0.2-alpha):
7753 - Detect and suppress "bug" warnings from the util/time test on
7754 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
7755 - Do not log an error-level message if we fail to find an IPv6
7756 network interface from the unit tests. Fixes bug 29160; bugfix
7759 o Minor bugfixes (usability, backport from 0.4.0.1-alpha):
7760 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
7761 Some users took this phrasing to mean that the mentioned guard was
7762 under their control or responsibility, which it is not. Fixes bug
7763 28895; bugfix on Tor 0.3.0.1-alpha.
7766 Changes in version 0.3.4.11 - 2019-02-21
7767 Tor 0.3.4.11 is the third stable release in its series. It includes
7768 a fix for a medium-severity security bug affecting Tor 0.3.2.1-alpha and
7769 later. All Tor instances running an affected release should upgrade to
7770 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7772 o Major bugfixes (cell scheduler, KIST, security):
7773 - Make KIST consider the outbuf length when computing what it can
7774 put in the outbuf. Previously, KIST acted as though the outbuf
7775 were empty, which could lead to the outbuf becoming too full. It
7776 is possible that an attacker could exploit this bug to cause a Tor
7777 client or relay to run out of memory and crash. Fixes bug 29168;
7778 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7779 TROVE-2019-001 and CVE-2019-8955.
7781 o Minor features (geoip):
7782 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7783 Country database. Closes ticket 29478.
7785 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
7786 - Update Cargo.lock file to match the version made by the latest
7787 version of Rust, so that "make distcheck" will pass again. Fixes
7788 bug 29244; bugfix on 0.3.3.4-alpha.
7790 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
7791 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7792 as a warning. Instead, log it as a protocol warning, because there
7793 is nothing that relay operators can do to fix it. Fixes bug 29029;
7794 bugfix on 0.2.5.7-rc.
7797 Changes in version 0.3.3.12 - 2019-02-21
7798 Tor 0.3.3.12 fixes a medium-severity security bug affecting Tor
7799 0.3.2.1-alpha and later. All Tor instances running an affected release
7800 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7802 This release marks the end of support for the Tor 0.3.3.x series. We
7803 recommend that users switch to either the Tor 0.3.4 series (supported
7804 until at least 10 June 2019), or the Tor 0.3.5 series, which will
7805 receive long-term support until at least 1 Feb 2022.
7807 o Major bugfixes (cell scheduler, KIST, security):
7808 - Make KIST consider the outbuf length when computing what it can
7809 put in the outbuf. Previously, KIST acted as though the outbuf
7810 were empty, which could lead to the outbuf becoming too full. It
7811 is possible that an attacker could exploit this bug to cause a Tor
7812 client or relay to run out of memory and crash. Fixes bug 29168;
7813 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7814 TROVE-2019-001 and CVE-2019-8955.
7816 o Minor features (geoip):
7817 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7818 Country database. Closes ticket 29478.
7820 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
7821 - Update Cargo.lock file to match the version made by the latest
7822 version of Rust, so that "make distcheck" will pass again. Fixes
7823 bug 29244; bugfix on 0.3.3.4-alpha.
7825 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
7826 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7827 as a warning. Instead, log it as a protocol warning, because there
7828 is nothing that relay operators can do to fix it. Fixes bug 29029;
7829 bugfix on 0.2.5.7-rc.
7832 Changes in version 0.4.0.2-alpha - 2019-02-21
7833 Tor 0.4.0.2-alpha is the second alpha in its series; it fixes several
7834 bugs from earlier versions, including several that had broken
7835 backward compatibility.
7837 It also includes a fix for a medium-severity security bug affecting Tor
7838 0.3.2.1-alpha and later. All Tor instances running an affected release
7839 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7841 o Major bugfixes (cell scheduler, KIST, security):
7842 - Make KIST consider the outbuf length when computing what it can
7843 put in the outbuf. Previously, KIST acted as though the outbuf
7844 were empty, which could lead to the outbuf becoming too full. It
7845 is possible that an attacker could exploit this bug to cause a Tor
7846 client or relay to run out of memory and crash. Fixes bug 29168;
7847 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7848 TROVE-2019-001 and CVE-2019-8955.
7850 o Major bugfixes (networking):
7851 - Gracefully handle empty username/password fields in SOCKS5
7852 username/password auth messsage and allow SOCKS5 handshake to
7853 continue. Previously, we had rejected these handshakes, breaking
7854 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
7856 o Major bugfixes (windows, startup):
7857 - When reading a consensus file from disk, detect whether it was
7858 written in text mode, and re-read it in text mode if so. Always
7859 write consensus files in binary mode so that we can map them into
7860 memory later. Previously, we had written in text mode, which
7861 confused us when we tried to map the file on windows. Fixes bug
7862 28614; bugfix on 0.4.0.1-alpha.
7864 o Minor features (compilation):
7865 - Compile correctly when OpenSSL is built with engine support
7866 disabled, or with deprecated APIs disabled. Closes ticket 29026.
7867 Patches from "Mangix".
7869 o Minor features (developer tooling):
7870 - Check that bugfix versions in changes files look like Tor versions
7871 from the versions spec. Warn when bugfixes claim to be on a future
7872 release. Closes ticket 27761.
7873 - Provide a git pre-commit hook that disallows committing if we have
7874 any failures in our code and changelog formatting checks. It is
7875 now available in scripts/maint/pre-commit.git-hook. Implements
7878 o Minor features (directory authority):
7879 - When a directory authority is using a bandwidth file to obtain
7880 bandwidth values, include the digest of that file in the vote.
7881 Closes ticket 26698.
7883 o Minor features (geoip):
7884 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7885 Country database. Closes ticket 29478.
7887 o Minor features (testing):
7888 - Treat all unexpected ERR and BUG messages as test failures. Closes
7891 o Minor bugfixes (build, compatibility, rust):
7892 - Update Cargo.lock file to match the version made by the latest
7893 version of Rust, so that "make distcheck" will pass again. Fixes
7894 bug 29244; bugfix on 0.3.3.4-alpha.
7896 o Minor bugfixes (compilation):
7897 - Fix compilation warnings in test_circuitpadding.c. Fixes bug
7898 29169; bugfix on 0.4.0.1-alpha.
7899 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
7900 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
7902 o Minor bugfixes (documentation):
7903 - Describe the contents of the v3 onion service client authorization
7904 files correctly: They hold public keys, not private keys. Fixes
7905 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
7907 o Minor bugfixes (linux seccomp sandbox):
7908 - Fix startup crash when experimental sandbox support is enabled.
7909 Fixes bug 29150; bugfix on 0.4.0.1-alpha. Patch by Peter Gerber.
7911 o Minor bugfixes (logging):
7912 - Avoid logging that we are relaxing a circuit timeout when that
7913 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
7914 - Log more information at "warning" level when unable to read a
7915 private key; log more information at "info" level when unable to
7916 read a public key. We had warnings here before, but they were lost
7917 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
7919 o Minor bugfixes (misc):
7920 - The amount of total available physical memory is now determined
7921 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
7922 when it is defined and a 64-bit variant is not available. Fixes
7923 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
7925 o Minor bugfixes (onion services):
7926 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
7927 than one private key for a hidden service. Fixes bug 29040; bugfix
7929 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
7930 "debug" level. Tor used to log it as a warning, which caused very
7931 long log lines to appear for some users. Fixes bug 29135; bugfix
7933 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7934 as a warning. Instead, log it as a protocol warning, because there
7935 is nothing that relay operators can do to fix it. Fixes bug 29029;
7936 bugfix on 0.2.5.7-rc.
7938 o Minor bugfixes (scheduler):
7939 - When re-adding channels to the pending list, check the correct
7940 channel's sched_heap_idx. This issue has had no effect in mainline
7941 Tor, but could have led to bugs down the road in improved versions
7942 of our circuit scheduling code. Fixes bug 29508; bugfix
7945 o Minor bugfixes (tests):
7946 - Fix intermittent failures on an adaptive padding test. Fixes one
7947 case of bug 29122; bugfix on 0.4.0.1-alpha.
7948 - Disable an unstable circuit-padding test that was failing
7949 intermittently because of an ill-defined small histogram. Such
7950 histograms will be allowed again after 29298 is implemented. Fixes
7951 a second case of bug 29122; bugfix on 0.4.0.1-alpha.
7952 - Detect and suppress "bug" warnings from the util/time test on
7953 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
7954 - Do not log an error-level message if we fail to find an IPv6
7955 network interface from the unit tests. Fixes bug 29160; bugfix
7959 - In the manpage entry describing MapAddress torrc setting, use
7960 example IP addresses from ranges specified for use in documentation
7961 by RFC 5737. Resolves issue 28623.
7964 - Remove the old check-tor script. Resolves issue 29072.
7967 Changes in version 0.4.0.1-alpha - 2019-01-18
7968 Tor 0.4.0.1-alpha is the first release in the new 0.4.0.x series. It
7969 introduces improved features for power and bandwidth conservation,
7970 more accurate reporting of bootstrap progress for user interfaces, and
7971 an experimental backend for an exciting new adaptive padding feature.
7972 There is also the usual assortment of bugfixes and minor features, all
7975 o Major features (battery management, client, dormant mode):
7976 - When Tor is running as a client, and it is unused for a long time,
7977 it can now enter a "dormant" state. When Tor is dormant, it avoids
7978 network and CPU activity until it is reawoken either by a user
7979 request or by a controller command. For more information, see the
7980 configuration options starting with "Dormant". Implements tickets
7982 - The client's memory of whether it is "dormant", and how long it
7983 has spent idle, persists across invocations. Implements
7985 - There is a DormantOnFirstStartup option that integrators can use
7986 if they expect that in many cases, Tor will be installed but
7989 o Major features (bootstrap reporting):
7990 - When reporting bootstrap progress, report the first connection
7991 uniformly, regardless of whether it's a connection for building
7992 application circuits. This allows finer-grained reporting of early
7993 progress than previously possible, with the improvements of ticket
7994 27169. Closes tickets 27167 and 27103. Addresses ticket 27308.
7995 - When reporting bootstrap progress, treat connecting to a proxy or
7996 pluggable transport as separate from having successfully used that
7997 proxy or pluggable transport to connect to a relay. Closes tickets
8000 o Major features (circuit padding):
8001 - Implement preliminary support for the circuit padding portion of
8002 Proposal 254. The implementation supports Adaptive Padding (aka
8003 WTF-PAD) state machines for use between experimental clients and
8004 relays. Support is also provided for APE-style state machines that
8005 use probability distributions instead of histograms to specify
8006 inter-packet delay. At the moment, Tor does not provide any
8007 padding state machines that are used in normal operation: for now,
8008 this feature exists solely for experimentation. Closes
8011 o Major features (refactoring):
8012 - Tor now uses an explicit list of its own subsystems when
8013 initializing and shutting down. Previously, these systems were
8014 managed implicitly in various places throughout the codebase.
8015 (There may still be some subsystems using the old system.) Closes
8018 o Minor features (bootstrap reporting):
8019 - When reporting bootstrap progress, stop distinguishing between
8020 situations where only internal paths are available and situations
8021 where external paths are available. Previously, Tor would often
8022 erroneously report that it had only internal paths. Closes
8025 o Minor features (continuous integration):
8026 - Log Python version during each Travis CI job. Resolves
8029 o Minor features (controller):
8030 - Add a DROPOWNERSHIP command to undo the effects of TAKEOWNERSHIP.
8031 Implements ticket 28843.
8033 o Minor features (developer tooling):
8034 - Provide a git hook script to prevent "fixup!" and "squash!"
8035 commits from ending up in the master branch, as scripts/main/pre-
8036 push.git-hook. Closes ticket 27993.
8038 o Minor features (directory authority):
8039 - Directory authorities support a new consensus algorithm, under
8040 which the family lines in microdescriptors are encoded in a
8041 canonical form. This change makes family lines more compressible
8042 in transit, and on the client. Closes ticket 28266; implements
8045 o Minor features (directory authority, relay):
8046 - Authorities now vote on a "StaleDesc" flag to indicate that a
8047 relay's descriptor is so old that the relay should upload again
8048 soon. Relays treat this flag as a signal to upload a new
8049 descriptor. This flag will eventually let us remove the
8050 'published' date from routerstatus entries, and make our consensus
8051 diffs much smaller. Closes ticket 26770; implements proposal 293.
8053 o Minor features (fallback directory mirrors):
8054 - Update the fallback whitelist based on operator opt-ins and opt-
8055 outs. Closes ticket 24805, patch by Phoul.
8057 o Minor features (FreeBSD):
8058 - On FreeBSD-based systems, warn relay operators if the
8059 "net.inet.ip.random_id" sysctl (IP ID randomization) is disabled.
8060 Closes ticket 28518.
8062 o Minor features (HTTP standards compliance):
8063 - Stop sending the header "Content-type: application/octet-stream"
8064 along with transparently compressed documents: this confused
8065 browsers. Closes ticket 28100.
8067 o Minor features (IPv6):
8068 - We add an option ClientAutoIPv6ORPort, to make clients randomly
8069 prefer a node's IPv4 or IPv6 ORPort. The random preference is set
8070 every time a node is loaded from a new consensus or bridge config.
8071 We expect that this option will enable clients to bootstrap more
8072 quickly without having to determine whether they support IPv4,
8073 IPv6, or both. Closes ticket 27490. Patch by Neel Chauhan.
8074 - When using addrs_in_same_network_family(), avoid choosing circuit
8075 paths that pass through the same IPv6 subnet more than once.
8076 Previously, we only checked IPv4 subnets. Closes ticket 24393.
8077 Patch by Neel Chauhan.
8079 o Minor features (log messages):
8080 - Improve log message in v3 onion services that could print out
8081 negative revision counters. Closes ticket 27707. Patch
8084 o Minor features (memory usage):
8085 - Save memory by storing microdescriptor family lists with a more
8086 compact representation. Closes ticket 27359.
8087 - Tor clients now use mmap() to read consensus files from disk, so
8088 that they no longer need keep the full text of a consensus in
8089 memory when parsing it or applying a diff. Closes ticket 27244.
8091 o Minor features (parsing):
8092 - Directory authorities now validate that router descriptors and
8093 ExtraInfo documents are in a valid subset of UTF-8, and reject
8094 them if they are not. Closes ticket 27367.
8096 o Minor features (performance):
8097 - Cache the results of summarize_protocol_flags(), so that we don't
8098 have to parse the same protocol-versions string over and over.
8099 This should save us a huge number of malloc calls on startup, and
8100 may reduce memory fragmentation with some allocators. Closes
8102 - Remove a needless memset() call from get_token_arguments, thereby
8103 speeding up the tokenization of directory objects by about 20%.
8104 Closes ticket 28852.
8105 - Replace parse_short_policy() with a faster implementation, to
8106 improve microdescriptor parsing time. Closes ticket 28853.
8107 - Speed up directory parsing a little by avoiding use of the non-
8108 inlined strcmp_len() function. Closes ticket 28856.
8109 - Speed up microdescriptor parsing by about 30%, to help improve
8110 startup time. Closes ticket 28839.
8112 o Minor features (pluggable transports):
8113 - Add support for emitting STATUS updates to Tor's control port from
8114 a pluggable transport process. Closes ticket 28846.
8115 - Add support for logging to Tor's logging subsystem from a
8116 pluggable transport process. Closes ticket 28180.
8118 o Minor features (process management):
8119 - Add a new process API for handling child processes. This new API
8120 allows Tor to have bi-directional communication with child
8121 processes on both Unix and Windows. Closes ticket 28179.
8122 - Use the subsystem manager to initialize and shut down the process
8123 module. Closes ticket 28847.
8125 o Minor features (relay):
8126 - When listing relay families, list them in canonical form including
8127 the relay's own identity, and try to give a more useful set of
8128 warnings. Part of ticket 28266 and proposal 298.
8130 o Minor features (required protocols):
8131 - Before exiting because of a missing required protocol, Tor will
8132 now check the publication time of the consensus, and not exit
8133 unless the consensus is newer than the Tor program's own release
8134 date. Previously, Tor would not check the consensus publication
8135 time, and so might exit because of a missing protocol that might
8136 no longer be required in a current consensus. Implements proposal
8137 297; closes ticket 27735.
8139 o Minor features (testing):
8140 - Allow a HeartbeatPeriod of less than 30 minutes in testing Tor
8141 networks. Closes ticket 28840. Patch by Rob Jansen.
8143 o Minor bugfixes (client, clock skew):
8144 - Bootstrap successfully even when Tor's clock is behind the clocks
8145 on the authorities. Fixes bug 28591; bugfix on 0.2.0.9-alpha.
8146 - Select guards even if the consensus has expired, as long as the
8147 consensus is still reasonably live. Fixes bug 24661; bugfix
8150 o Minor bugfixes (compilation):
8151 - Compile correctly on OpenBSD; previously, we were missing some
8152 headers required in order to detect it properly. Fixes bug 28938;
8153 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
8155 o Minor bugfixes (directory clients):
8156 - Mark outdated dirservers when Tor only has a reasonably live
8157 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
8159 o Minor bugfixes (directory mirrors):
8160 - Even when a directory mirror's clock is behind the clocks on the
8161 authorities, we now allow the mirror to serve "future"
8162 consensuses. Fixes bug 28654; bugfix on 0.3.0.1-alpha.
8164 o Minor bugfixes (DNS):
8165 - Gracefully handle an empty or absent resolve.conf file by falling
8166 back to using "localhost" as a DNS server (and hoping it works).
8167 Previously, we would just stop running as an exit. Fixes bug
8168 21900; bugfix on 0.2.1.10-alpha.
8170 o Minor bugfixes (guards):
8171 - In count_acceptable_nodes(), the minimum number is now one bridge
8172 or guard node, and two non-guard nodes for a circuit. Previously,
8173 we had added up the sum of all nodes with a descriptor, but that
8174 could cause us to build failing circuits when we had either too
8175 many bridges or not enough guard nodes. Fixes bug 25885; bugfix on
8176 0.2.3.1-alpha. Patch by Neel Chauhan.
8178 o Minor bugfixes (IPv6):
8179 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
8180 IPv6 socket was bound using an address family of AF_INET instead
8181 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
8184 o Minor bugfixes (logging):
8185 - Rework rep_hist_log_link_protocol_counts() to iterate through all
8186 link protocol versions when logging incoming/outgoing connection
8187 counts. Tor no longer skips version 5, and we won't have to
8188 remember to update this function when new link protocol version is
8189 developed. Fixes bug 28920; bugfix on 0.2.6.10.
8191 o Minor bugfixes (networking):
8192 - Introduce additional checks into tor_addr_parse() to reject
8193 certain incorrect inputs that previously were not detected. Fixes
8194 bug 23082; bugfix on 0.2.0.10-alpha.
8196 o Minor bugfixes (onion service v3, client):
8197 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
8198 connection waiting for a descriptor that we actually have in the
8199 cache. It turns out that this can actually happen, though it is
8200 rare. Now, tor will recover and retry the descriptor. Fixes bug
8201 28669; bugfix on 0.3.2.4-alpha.
8203 o Minor bugfixes (periodic events):
8204 - Refrain from calling routerlist_remove_old_routers() from
8205 check_descriptor_callback(). Instead, create a new hourly periodic
8206 event. Fixes bug 27929; bugfix on 0.2.8.1-alpha.
8208 o Minor bugfixes (pluggable transports):
8209 - Make sure that data is continously read from standard output and
8210 standard error pipes of a pluggable transport child-process, to
8211 avoid deadlocking when a pipe's buffer is full. Fixes bug 26360;
8212 bugfix on 0.2.3.6-alpha.
8214 o Minor bugfixes (unit tests):
8215 - Instead of relying on hs_free_all() to clean up all onion service
8216 objects in test_build_descriptors(), we now deallocate them one by
8217 one. This lets Coverity know that we are not leaking memory there
8218 and fixes CID 1442277. Fixes bug 28989; bugfix on 0.3.5.1-alpha.
8220 o Minor bugfixes (usability):
8221 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
8222 Some users took this phrasing to mean that the mentioned guard was
8223 under their control or responsibility, which it is not. Fixes bug
8224 28895; bugfix on Tor 0.3.0.1-alpha.
8226 o Code simplification and refactoring:
8227 - Reimplement NETINFO cell parsing and generation to rely on
8228 trunnel-generated wire format handling code. Closes ticket 27325.
8229 - Remove unnecessary unsafe code from the Rust macro "cstr!". Closes
8231 - Rework SOCKS wire format handling to rely on trunnel-generated
8232 parsing/generation code. Resolves ticket 27620.
8233 - Split out bootstrap progress reporting from control.c into a
8234 separate file. Part of ticket 27402.
8235 - The .may_include files that we use to describe our directory-by-
8236 directory dependency structure now describe a noncircular
8237 dependency graph over the directories that they cover. Our
8238 checkIncludes.py tool now enforces this noncircularity. Closes
8242 - Mention that you cannot add a new onion service if Tor is already
8243 running with Sandbox enabled. Closes ticket 28560.
8244 - Improve ControlPort documentation. Mention that it accepts
8245 address:port pairs, and can be used multiple times. Closes
8247 - Document the exact output of "tor --version". Closes ticket 28889.
8250 - Stop responding to the 'GETINFO status/version/num-concurring' and
8251 'GETINFO status/version/num-versioning' control port commands, as
8252 those were deprecated back in 0.2.0.30. Also stop listing them in
8253 output of 'GETINFO info/names'. Resolves ticket 28757.
8254 - The scripts used to generate and maintain the list of fallback
8255 directories have been extracted into a new "fallback-scripts"
8256 repository. Closes ticket 27914.
8259 - Run shellcheck for scripts in the in scripts/ directory. Closes
8261 - Add unit tests for tokenize_string() and get_next_token()
8262 functions. Resolves ticket 27625.
8264 o Code simplification and refactoring (onion service v3):
8265 - Consolidate the authorized client descriptor cookie computation
8266 code from client and service into one function. Closes
8269 o Code simplification and refactoring (shell scripts):
8270 - Cleanup scan-build.sh to silence shellcheck warnings. Closes
8272 - Fix issues that shellcheck found in chutney-git-bisect.sh.
8273 Resolves ticket 28006.
8274 - Fix issues that shellcheck found in updateRustDependencies.sh.
8275 Resolves ticket 28012.
8276 - Fix shellcheck warnings in cov-diff script. Resolves issue 28009.
8277 - Fix shellcheck warnings in run_calltool.sh. Resolves ticket 28011.
8278 - Fix shellcheck warnings in run_trunnel.sh. Resolves issue 28010.
8279 - Fix shellcheck warnings in scripts/test/coverage. Resolves
8283 Changes in version 0.3.3.11 - 2019-01-07
8284 Tor 0.3.3.11 backports numerous fixes from later versions of Tor.
8285 numerous fixes, including an important fix for anyone using OpenSSL
8286 1.1.1. Anyone running an earlier version of Tor 0.3.3 should upgrade
8287 to this version, or to a later series.
8289 As a reminder, support the Tor 0.3.3 series will end on 22 Feb 2019.
8290 We anticipate that this will be the last release of Tor 0.3.3, unless
8291 some major bug is before then. Some time between now and then, users
8292 should switch to either the Tor 0.3.4 series (supported until at least
8293 10 June 2019), or the Tor 0.3.5 series, which will receive long-term
8294 support until at least 1 Feb 2022.
8296 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
8297 - Fix our usage of named groups when running as a TLS 1.3 client in
8298 OpenSSL 1.1.1. Previously, we only initialized EC groups when
8299 running as a relay, which caused clients to fail to negotiate TLS
8300 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
8303 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
8304 - Fix a use-after-free error that could be caused by passing Tor an
8305 impossible set of options that would fail during options_act().
8306 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
8308 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
8309 - Only run one online rust build in Travis, to reduce network
8310 errors. Skip offline rust builds on Travis for Linux gcc, because
8311 they're redundant. Implements ticket 27252.
8312 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
8313 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
8314 Linux with default settings, because all the non-default builds
8315 use gcc on Linux. Implements ticket 27252.
8317 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
8318 - Use the Travis Homebrew addon to install packages on macOS during
8319 Travis CI. The package list is the same, but the Homebrew addon
8320 does not do a `brew update` by default. Implements ticket 27738.
8322 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
8323 - Replace the 150 fallbacks originally introduced in Tor
8324 0.3.3.1-alpha in January 2018 (of which ~115 were still
8325 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
8326 removed) generated in December 2018. Closes ticket 24803.
8328 o Minor features (geoip):
8329 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
8330 Country database. Closes ticket 29012.
8332 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
8333 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
8334 key export function from handling long labels. When this bug is
8335 detected, Tor will disable TLS 1.3. We recommend upgrading to a
8336 version of OpenSSL without this bug when it becomes available.
8337 Closes ticket 28973.
8339 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
8340 - Update relay descriptor on bandwidth changes only when the uptime
8341 is smaller than 24h, in order to reduce the efficiency of guard
8342 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
8344 o Minor bugfixes (C correctness, backport from 0.3.5.4-alpha):
8345 - Avoid undefined behavior in an end-of-string check when parsing
8346 the BEGIN line in a directory object. Fixes bug 28202; bugfix
8349 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
8350 - Rewrite our assertion macros so that they no longer suppress the
8351 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
8353 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
8354 - Initialize a variable unconditionally in aes_new_cipher(), since
8355 some compilers cannot tell that we always initialize it before
8356 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
8358 o Minor bugfixes (directory authority, backport from 0.3.5.4-alpha):
8359 - Log additional info when we get a relay that shares an ed25519 ID
8360 with a different relay, instead making a BUG() warning. Fixes bug
8361 27800; bugfix on 0.3.2.1-alpha.
8363 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
8364 - When a user requests a group-readable DataDirectory, give it to
8365 them. Previously, when the DataDirectory and the CacheDirectory
8366 were the same, the default setting (0) for
8367 CacheDirectoryGroupReadable would override the setting for
8368 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
8371 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
8372 - When the onion service directory can't be created or has the wrong
8373 permissions, do not log a stack trace. Fixes bug 27335; bugfix
8376 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
8377 - Close all SOCKS request (for the same .onion) if the newly fetched
8378 descriptor is unusable. Before that, we would close only the first
8379 one leaving the other hanging and let to time out by themselves.
8380 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
8382 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
8383 - Don't warn so loudly when Tor is unable to decode an onion
8384 descriptor. This can now happen as a normal use case if a client
8385 gets a descriptor with client authorization but the client is not
8386 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
8388 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
8389 - When deleting an ephemeral onion service (DEL_ONION), do not close
8390 any rendezvous circuits in order to let the existing client
8391 connections finish by themselves or closed by the application. The
8392 HS v2 is doing that already so now we have the same behavior for
8393 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
8395 o Minor bugfixes (HTTP tunnel):
8396 - Fix a bug warning when closing an HTTP tunnel connection due to
8397 an HTTP request we couldn't handle. Fixes bug 26470; bugfix on
8400 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
8401 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
8402 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
8404 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
8405 - Ensure circuitmux queues are empty before scheduling or sending
8406 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
8408 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
8409 - Reject protocol names containing bytes other than alphanumeric
8410 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
8413 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
8414 - Compute protover votes correctly in the rust version of the
8415 protover code. Previously, the protover rewrite in 24031 allowed
8416 repeated votes from the same voter for the same protocol version
8417 to be counted multiple times in protover_compute_vote(). Fixes bug
8418 27649; bugfix on 0.3.3.5-rc.
8419 - Reject protover names that contain invalid characters. Fixes bug
8420 27687; bugfix on 0.3.3.1-alpha.
8422 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
8423 - protover_all_supported() would attempt to allocate up to 16GB on
8424 some inputs, leading to a potential memory DoS. Fixes bug 27206;
8425 bugfix on 0.3.3.5-rc.
8427 o Minor bugfixes (rust, backport from 0.3.5.4-alpha):
8428 - Fix a potential null dereference in protover_all_supported(). Add
8429 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
8430 - Return a string that can be safely freed by C code, not one
8431 created by the rust allocator, in protover_all_supported(). Fixes
8432 bug 27740; bugfix on 0.3.3.1-alpha.
8433 - Fix an API mismatch in the rust implementation of
8434 protover_compute_vote(). This bug could have caused crashes on any
8435 directory authorities running Tor with Rust (which we do not yet
8436 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
8438 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
8439 - If a unit test running in a subprocess exits abnormally or with a
8440 nonzero status code, treat the test as having failed, even if the
8441 test reported success. Without this fix, memory leaks don't cause
8442 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
8443 bugfix on 0.2.2.4-alpha.
8445 o Minor bugfixes (testing, backport from 0.3.5.4-alpha):
8446 - Treat backtrace test failures as expected on BSD-derived systems
8447 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
8448 (FreeBSD failures have been treated as expected since 18204 in
8449 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
8451 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
8452 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
8453 bugfix on 0.3.0.1-alpha.
8456 Changes in version 0.3.4.10 - 2019-01-07
8457 Tor 0.3.4.9 is the second stable release in its series; it backports
8458 numerous fixes, including an important fix for relays, and for anyone
8459 using OpenSSL 1.1.1. Anyone running an earlier version of Tor 0.3.4
8462 As a reminder, the Tor 0.3.4 series will be supported until 10 June
8463 2019. Some time between now and then, users should switch to the Tor
8464 0.3.5 series, which will receive long-term support until at least 1
8467 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
8468 - Fix our usage of named groups when running as a TLS 1.3 client in
8469 OpenSSL 1.1.1. Previously, we only initialized EC groups when
8470 running as a relay, which caused clients to fail to negotiate TLS
8471 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
8474 o Major bugfixes (relay, directory, backport from 0.3.5.7):
8475 - Always reactivate linked connections in the main loop so long as
8476 any linked connection has been active. Previously, connections
8477 serving directory information wouldn't get reactivated after the
8478 first chunk of data was sent (usually 32KB), which would prevent
8479 clients from bootstrapping. Fixes bug 28912; bugfix on
8480 0.3.4.1-alpha. Patch by "cypherpunks3".
8482 o Minor features (continuous integration, Windows, backport from 0.3.5.6-rc):
8483 - Always show the configure and test logs, and upload them as build
8484 artifacts, when building for Windows using Appveyor CI.
8487 o Minor features (controller, backport from 0.3.5.1-alpha):
8488 - For purposes of CIRC_BW-based dropped cell detection, track half-
8489 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
8490 bias check cells to arrive without counting it as dropped until
8491 either the END arrives, or the windows are empty. Closes
8494 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
8495 - Replace the 150 fallbacks originally introduced in Tor
8496 0.3.3.1-alpha in January 2018 (of which ~115 were still
8497 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
8498 removed) generated in December 2018. Closes ticket 24803.
8500 o Minor features (geoip):
8501 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
8502 Country database. Closes ticket 28395.
8504 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
8505 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
8506 key export function from handling long labels. When this bug is
8507 detected, Tor will disable TLS 1.3. We recommend upgrading to a
8508 version of OpenSSL without this bug when it becomes available.
8509 Closes ticket 28973.
8511 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
8512 - Initialize a variable unconditionally in aes_new_cipher(), since
8513 some compilers cannot tell that we always initialize it before
8514 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
8516 o Minor bugfixes (connection, relay, backport from 0.3.5.5-alpha):
8517 - Avoid a logging a BUG() stacktrace when closing connection held
8518 open because the write side is rate limited but not the read side.
8519 Now, the connection read side is simply shut down until Tor is
8520 able to flush the connection and close it. Fixes bug 27750; bugfix
8523 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.5-alpha):
8524 - Manually configure the zstd compiler options, when building using
8525 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
8526 not come with a pkg-config file. Fixes bug 28454; bugfix
8528 - Stop using an external OpenSSL install, and stop installing MSYS2
8529 packages, when building using mingw on Appveyor Windows CI. Fixes
8530 bug 28399; bugfix on 0.3.4.1-alpha.
8532 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.6-rc):
8533 - Explicitly specify the path to the OpenSSL library and do not
8534 download OpenSSL from Pacman, but instead use the library that is
8535 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
8537 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
8538 - When a user requests a group-readable DataDirectory, give it to
8539 them. Previously, when the DataDirectory and the CacheDirectory
8540 were the same, the default setting (0) for
8541 CacheDirectoryGroupReadable would override the setting for
8542 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
8545 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
8546 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
8547 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
8549 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
8550 - Don't warn so loudly when Tor is unable to decode an onion
8551 descriptor. This can now happen as a normal use case if a client
8552 gets a descriptor with client authorization but the client is not
8553 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
8555 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
8556 - When deleting an ephemeral onion service (DEL_ONION), do not close
8557 any rendezvous circuits in order to let the existing client
8558 connections finish by themselves or closed by the application. The
8559 HS v2 is doing that already so now we have the same behavior for
8560 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
8562 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
8563 - Update relay descriptor on bandwidth changes only when the uptime
8564 is smaller than 24h, in order to reduce the efficiency of guard
8565 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
8567 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
8568 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
8569 bugfix on 0.3.0.1-alpha.
8572 Changes in version 0.3.5.7 - 2019-01-07
8573 Tor 0.3.5.7 is the first stable release in its series; it includes
8574 compilation and portability fixes, and a fix for a severe problem
8575 affecting directory caches.
8577 The Tor 0.3.5 series includes several new features and performance
8578 improvements, including client authorization for v3 onion services,
8579 cleanups to bootstrap reporting, support for improved bandwidth-
8580 measurement tools, experimental support for NSS in place of OpenSSL,
8581 and much more. It also begins a full reorganization of Tor's code
8582 layout, for improved modularity and maintainability in the future.
8583 Finally, there is the usual set of performance improvements and
8584 bugfixes that we try to do in every release series.
8586 There are a couple of changes in the 0.3.5 that may affect
8587 compatibility. First, the default version for newly created onion
8588 services is now v3. Use the HiddenServiceVersion option if you want to
8589 override this. Second, some log messages related to bootstrapping have
8590 changed; if you use stem, you may need to update to the latest version
8591 so it will recognize them.
8593 We have designated 0.3.5 as a "long-term support" (LTS) series: we
8594 will continue to patch major bugs in typical configurations of 0.3.5
8595 until at least 1 Feb 2022. (We do not plan to provide long-term
8596 support for embedding, Rust support, NSS support, running a directory
8597 authority, or unsupported platforms. For these, you will need to stick
8598 with the latest stable release.)
8600 Below are the changes since 0.3.5.6-rc. For a complete list of changes
8601 since 0.3.4.9, see the ReleaseNotes file.
8603 o Major bugfixes (relay, directory):
8604 - Always reactivate linked connections in the main loop so long as
8605 any linked connection has been active. Previously, connections
8606 serving directory information wouldn't get reactivated after the
8607 first chunk of data was sent (usually 32KB), which would prevent
8608 clients from bootstrapping. Fixes bug 28912; bugfix on
8609 0.3.4.1-alpha. Patch by "cypherpunks3".
8611 o Minor features (compilation):
8612 - When possible, place our warning flags in a separate file, to
8613 avoid flooding verbose build logs. Closes ticket 28924.
8615 o Minor features (geoip):
8616 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
8617 Country database. Closes ticket 29012.
8619 o Minor features (OpenSSL bug workaround):
8620 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
8621 key export function from handling long labels. When this bug is
8622 detected, Tor will disable TLS 1.3. We recommend upgrading to a
8623 version of OpenSSL without this bug when it becomes available.
8624 Closes ticket 28973.
8626 o Minor features (performance):
8627 - Remove about 96% of the work from the function that we run at
8628 startup to test our curve25519_basepoint implementation. Since
8629 this function has yet to find an actual failure, we now only run
8630 it for 8 iterations instead of 200. Based on our profile
8631 information, this change should save around 8% of our startup time
8632 on typical desktops, and may have a similar effect on other
8633 platforms. Closes ticket 28838.
8634 - Stop re-validating our hardcoded Diffie-Hellman parameters on
8635 every startup. Doing this wasted time and cycles, especially on
8636 low-powered devices. Closes ticket 28851.
8638 o Minor bugfixes (compilation):
8639 - Fix compilation for Android by adding a missing header to
8640 freespace.c. Fixes bug 28974; bugfix on 0.3.5.1-alpha.
8642 o Minor bugfixes (correctness):
8643 - Fix an unreached code path where we checked the value of
8644 "hostname" inside send_resolved_hostname_cell(). Previously, we
8645 used it before checking it; now we check it first. Fixes bug
8646 28879; bugfix on 0.1.2.7-alpha.
8648 o Minor bugfixes (testing):
8649 - Make sure that test_rebind.py actually obeys its timeout, even
8650 when it receives a large number of log messages. Fixes bug 28883;
8651 bugfix on 0.3.5.4-alpha.
8652 - Stop running stem's unit tests as part of "make test-stem", but
8653 continue to run stem's unit and online tests during "make test-
8654 stem-full". Fixes bug 28568; bugfix on 0.2.6.3-alpha.
8656 o Minor bugfixes (windows services):
8657 - Make Tor start correctly as an NT service again: previously it was
8658 broken by refactoring. Fixes bug 28612; bugfix on 0.3.5.3-alpha.
8660 o Code simplification and refactoring:
8661 - When parsing a port configuration, make it more obvious to static
8662 analyzer tools that we always initialize the address. Closes
8666 Changes in version 0.3.5.6-rc - 2018-12-18
8667 Tor 0.3.5.6-rc fixes numerous small bugs in earlier versions of Tor.
8668 It is the first release candidate in the 0.3.5.x series; if no further
8669 huge bugs are found, our next release may be the stable 0.3.5.x.
8671 o Minor features (continuous integration, Windows):
8672 - Always show the configure and test logs, and upload them as build
8673 artifacts, when building for Windows using Appveyor CI.
8676 o Minor features (fallback directory list):
8677 - Replace the 150 fallbacks originally introduced in Tor
8678 0.3.3.1-alpha in January 2018 (of which ~115 were still
8679 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
8680 removed) generated in December 2018. Closes ticket 24803.
8682 o Minor features (geoip):
8683 - Update geoip and geoip6 to the December 5 2018 Maxmind GeoLite2
8684 Country database. Closes ticket 28744.
8686 o Minor bugfixes (compilation):
8687 - Add missing dependency on libgdi32.dll for tor-print-ed-signing-
8688 cert.exe on Windows. Fixes bug 28485; bugfix on 0.3.5.1-alpha.
8690 o Minor bugfixes (continuous integration, Windows):
8691 - Explicitly specify the path to the OpenSSL library and do not
8692 download OpenSSL from Pacman, but instead use the library that is
8693 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
8695 o Minor bugfixes (onion service v3):
8696 - When deleting an ephemeral onion service (DEL_ONION), do not close
8697 any rendezvous circuits in order to let the existing client
8698 connections finish by themselves or closed by the application. The
8699 HS v2 is doing that already so now we have the same behavior for
8700 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
8702 o Minor bugfixes (restart-in-process, boostrap):
8703 - Add missing resets of bootstrap tracking state when shutting down
8704 (regression caused by ticket 27169). Fixes bug 28524; bugfix
8707 o Minor bugfixes (testing):
8708 - Use a separate DataDirectory for the test_rebind script.
8709 Previously, this script would run using the default DataDirectory,
8710 and sometimes fail. Fixes bug 28562; bugfix on 0.3.5.1-alpha.
8711 Patch from Taylor R Campbell.
8712 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
8713 bugfix on 0.3.0.1-alpha.
8715 o Minor bugfixes (Windows):
8716 - Correctly identify Windows 8.1, Windows 10, and Windows Server
8717 2008 and later from their NT versions. Fixes bug 28096; bugfix on
8718 0.2.2.34; reported by Keifer Bly.
8719 - On recent Windows versions, the GetVersionEx() function may report
8720 an earlier Windows version than the running OS. To avoid user
8721 confusion, add "[or later]" to Tor's version string on affected
8722 versions of Windows. Fixes bug 28096; bugfix on 0.2.2.34; reported
8724 - Remove Windows versions that were never supported by the
8725 GetVersionEx() function. Stop duplicating the latest Windows
8726 version in get_uname(). Fixes bug 28096; bugfix on 0.2.2.34;
8727 reported by Keifer Bly.
8730 - Increase logging and tag all log entries with timestamps in
8731 test_rebind.py. Provides diagnostics for issue 28229.
8733 o Code simplification and refactoring (shared random, dirauth):
8734 - Change many tor_assert() to use BUG() instead. The idea is to not
8735 crash a dirauth but rather scream loudly with a stacktrace and let
8736 it continue run. The shared random subsystem is very resilient and
8737 if anything wrong happens with it, at worst a non coherent value
8738 will be put in the vote and discarded by the other authorities.
8739 Closes ticket 19566.
8741 o Documentation (onion services):
8742 - Document in the man page that changing ClientOnionAuthDir value or
8743 adding a new file in the directory will not work at runtime upon
8744 sending a HUP if Sandbox 1. Closes ticket 28128.
8745 - Note in the man page that the only real way to fully revoke an
8746 onion service v3 client authorization is by restarting the tor
8747 process. Closes ticket 28275.
8750 Changes in version 0.3.5.5-alpha - 2018-11-16
8751 Tor 0.3.5.5-alpha includes numerous bugfixes on earlier releases,
8752 including several that we hope to backport to older release series in
8755 o Major bugfixes (OpenSSL, portability):
8756 - Fix our usage of named groups when running as a TLS 1.3 client in
8757 OpenSSL 1.1.1. Previously, we only initialized EC groups when
8758 running as a relay, which caused clients to fail to negotiate TLS
8759 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
8762 o Minor features (geoip):
8763 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
8764 Country database. Closes ticket 28395.
8766 o Minor bugfixes (compilation):
8767 - Initialize a variable unconditionally in aes_new_cipher(), since
8768 some compilers cannot tell that we always initialize it before
8769 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
8771 o Minor bugfixes (connection, relay):
8772 - Avoid a logging a BUG() stacktrace when closing connection held
8773 open because the write side is rate limited but not the read side.
8774 Now, the connection read side is simply shut down until Tor is
8775 able to flush the connection and close it. Fixes bug 27750; bugfix
8778 o Minor bugfixes (continuous integration, Windows):
8779 - Manually configure the zstd compiler options, when building using
8780 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
8781 not come with a pkg-config file. Fixes bug 28454; bugfix
8783 - Stop using an external OpenSSL install, and stop installing MSYS2
8784 packages, when building using mingw on Appveyor Windows CI. Fixes
8785 bug 28399; bugfix on 0.3.4.1-alpha.
8787 o Minor bugfixes (documentation):
8788 - Make Doxygen work again after the code movement in the 0.3.5
8789 source tree. Fixes bug 28435; bugfix on 0.3.5.1-alpha.
8791 o Minor bugfixes (Linux seccomp2 sandbox):
8792 - Permit the "shutdown()" system call, which is apparently used by
8793 OpenSSL under some circumstances. Fixes bug 28183; bugfix
8796 o Minor bugfixes (logging):
8797 - Stop talking about the Named flag in log messages. Clients have
8798 ignored the Named flag since 0.3.2. Fixes bug 28441; bugfix
8801 o Minor bugfixes (memory leaks):
8802 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
8803 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
8805 o Minor bugfixes (onion services):
8806 - On an intro point for a version 3 onion service, stop closing
8807 introduction circuits on an NACK. This lets the client decide
8808 whether to reuse the circuit or discard it. Previously, we closed
8809 intro circuits when sending NACKs. Fixes bug 27841; bugfix on
8810 0.3.2.1-alpha. Patch by Neel Chaunan.
8811 - When replacing a descriptor in the client cache, make sure to
8812 close all client introduction circuits for the old descriptor, so
8813 we don't end up with unusable leftover circuits. Fixes bug 27471;
8814 bugfix on 0.3.2.1-alpha.
8817 Changes in version 0.3.5.4-alpha - 2018-11-08
8818 Tor 0.3.5.4-alpha includes numerous bugfixes on earlier versions and
8819 improves our continuous integration support. It continues our attempts
8820 to stabilize this alpha branch and build it into a foundation for an
8821 acceptable long-term-support release.
8823 o Major bugfixes (compilation, rust):
8824 - Rust tests can now build and run successfully with the
8825 --enable-fragile-hardening option enabled. Doing this currently
8826 requires the rust beta channel; it will be possible with stable
8827 rust once Rust version 1.31 is released. Patch from Alex Crichton.
8828 Fixes bugs 27272, 27273, and 27274. Bugfix on 0.3.1.1-alpha.
8830 o Major bugfixes (embedding, main loop):
8831 - When DisableNetwork becomes set, actually disable periodic events
8832 that are already enabled. (Previously, we would refrain from
8833 enabling new ones, but we would leave the old ones turned on.)
8834 Fixes bug 28348; bugfix on 0.3.4.1-alpha.
8836 o Minor features (continuous integration):
8837 - Add a Travis CI build for --enable-nss on Linux gcc. Closes
8839 - Add new CI job to Travis configuration to run stem-based
8840 integration tests. Closes ticket 27913.
8842 o Minor features (Windows, continuous integration):
8843 - Build tor on Windows Server 2012 R2 and Windows Server 2016 using
8844 Appveyor's CI. Closes ticket 28318.
8846 o Minor bugfixes (C correctness, also in 0.3.4.9):
8847 - Avoid undefined behavior in an end-of-string check when parsing
8848 the BEGIN line in a directory object. Fixes bug 28202; bugfix
8851 o Minor bugfixes (compilation):
8852 - Fix a pair of missing headers on OpenBSD. Fixes bug 28303; bugfix
8853 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
8855 o Minor bugfixes (compilation, OpenSolaris):
8856 - Fix compilation on OpenSolaris and its descendants by adding a
8857 missing include to compat_pthreads.c. Fixes bug 27963; bugfix
8860 o Minor bugfixes (configuration):
8861 - Refuse to start with relative file paths and RunAsDaemon set
8862 (regression from the fix for bug 22731). Fixes bug 28298; bugfix
8865 o Minor bugfixes (directory authority, also in 0.3.4.9):
8866 - Log additional info when we get a relay that shares an ed25519 ID
8867 with a different relay, instead of a BUG() warning with a
8868 backtrace. Fixes bug 27800; bugfix on 0.3.2.1-alpha.
8870 o Minor bugfixes (onion service v3):
8871 - Build the service descriptor's signing key certificate before
8872 uploading, so we always have a fresh one: leaving no chances for
8873 it to expire service side. Fixes bug 27838; bugfix
8876 o Minor bugfixes (onion service v3, client authorization):
8877 - Fix an assert() when adding a client authorization for the first
8878 time and then sending a HUP signal to the service. Before that,
8879 Tor would stop abruptly. Fixes bug 27995; bugfix on 0.3.5.1-alpha.
8881 o Minor bugfixes (onion services):
8882 - Unless we have explicitly set HiddenServiceVersion, detect the
8883 onion service version and then look for invalid options.
8884 Previously, we did the reverse, but that broke existing configs
8885 which were pointed to a v2 service and had options like
8886 HiddenServiceAuthorizeClient set. Fixes bug 28127; bugfix on
8887 0.3.5.1-alpha. Patch by Neel Chauhan.
8889 o Minor bugfixes (portability):
8890 - Make the OPE code (which is used for v3 onion services) run
8891 correctly on big-endian platforms. Fixes bug 28115; bugfix
8894 o Minor bugfixes (protover, rust):
8895 - Reject extra commas in version strings. Fixes bug 27197; bugfix
8898 o Minor bugfixes (relay shutdown, systemd):
8899 - Notify systemd of ShutdownWaitLength so it can be set to longer
8900 than systemd's TimeoutStopSec. In Tor's systemd service file, set
8901 TimeoutSec to 60 seconds to allow Tor some time to shut down.
8902 Fixes bug 28113; bugfix on 0.2.6.2-alpha.
8904 o Minor bugfixes (rust, also in 0.3.4.9):
8905 - Fix a potential null dereference in protover_all_supported(). Add
8906 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
8907 - Return a string that can be safely freed by C code, not one
8908 created by the rust allocator, in protover_all_supported(). Fixes
8909 bug 27740; bugfix on 0.3.3.1-alpha.
8911 o Minor bugfixes (rust, directory authority, also in 0.3.4.9):
8912 - Fix an API mismatch in the rust implementation of
8913 protover_compute_vote(). This bug could have caused crashes on any
8914 directory authorities running Tor with Rust (which we do not yet
8915 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
8917 o Minor bugfixes (testing):
8918 - Avoid hangs and race conditions in test_rebind.py. Fixes bug
8919 27968; bugfix on 0.3.5.1-alpha.
8921 o Minor bugfixes (testing, also in 0.3.4.9):
8922 - Treat backtrace test failures as expected on BSD-derived systems
8923 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
8924 (FreeBSD failures have been treated as expected since 18204 in
8925 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
8927 o Documentation (onion service manpage):
8928 - Improve HSv3 client authorization by making some options more
8929 explicit and detailed. Closes ticket 28026. Patch by Mike Tigas.
8932 Changes in version 0.3.4.9 - 2018-11-02
8933 Tor 0.3.4.9 is the second stable release in its series; it backports
8934 numerous fixes, including a fix for a bandwidth management bug that
8935 was causing memory exhaustion on relays. Anyone running an earlier
8936 version of Tor 0.3.4.9 should upgrade.
8938 o Major bugfixes (compilation, backport from 0.3.5.3-alpha):
8939 - Fix compilation on ARM (and other less-used CPUs) when compiling
8940 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
8942 o Major bugfixes (mainloop, bootstrap, backport from 0.3.5.3-alpha):
8943 - Make sure Tor bootstraps and works properly if only the
8944 ControlPort is set. Prior to this fix, Tor would only bootstrap
8945 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
8946 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
8948 o Major bugfixes (relay, backport from 0.3.5.3-alpha):
8949 - When our write bandwidth limit is exhausted, stop writing on the
8950 connection. Previously, we had a typo in the code that would make
8951 us stop reading instead, leading to relay connections being stuck
8952 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
8955 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
8956 - Fix a use-after-free error that could be caused by passing Tor an
8957 impossible set of options that would fail during options_act().
8958 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
8960 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
8961 - Don't do a distcheck with --disable-module-dirauth in Travis.
8962 Implements ticket 27252.
8963 - Only run one online rust build in Travis, to reduce network
8964 errors. Skip offline rust builds on Travis for Linux gcc, because
8965 they're redundant. Implements ticket 27252.
8966 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
8967 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
8968 Linux with default settings, because all the non-default builds
8969 use gcc on Linux. Implements ticket 27252.
8971 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
8972 - Use the Travis Homebrew addon to install packages on macOS during
8973 Travis CI. The package list is the same, but the Homebrew addon
8974 does not do a `brew update` by default. Implements ticket 27738.
8976 o Minor features (geoip):
8977 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
8978 Country database. Closes ticket 27991.
8980 o Minor bugfixes (32-bit OSX and iOS, timing, backport from 0.3.5.2-alpha):
8981 - Fix an integer overflow bug in our optimized 32-bit millisecond-
8982 difference algorithm for 32-bit Apple platforms. Previously, it
8983 would overflow when calculating the difference between two times
8984 more than 47 days apart. Fixes part of bug 27139; bugfix
8986 - Improve the precision of our 32-bit millisecond difference
8987 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
8988 bugfix on 0.3.4.1-alpha.
8989 - Relax the tolerance on the mainloop/update_time_jumps test when
8990 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
8993 o Minor bugfixes (C correctness, to appear in 0.3.5.4-alpha):
8994 - Avoid undefined behavior in an end-of-string check when parsing
8995 the BEGIN line in a directory object. Fixes bug 28202; bugfix
8998 o Minor bugfixes (CI, appveyor, to appear in 0.3.5.4-alpha):
8999 - Only install the necessary mingw packages during our appveyor
9000 builds. This change makes the build a little faster, and prevents
9001 a conflict with a preinstalled mingw openssl that appveyor now
9002 ships. Fixes bugs 27943 and 27765; bugfix on 0.3.4.2-alpha.
9004 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
9005 - Rewrite our assertion macros so that they no longer suppress the
9006 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
9008 o Minor bugfixes (continuous integration, backport from 0.3.5.1-alpha):
9009 - Stop reinstalling identical packages in our Windows CI. Fixes bug
9010 27464; bugfix on 0.3.4.1-alpha.
9012 o Minor bugfixes (directory authority, to appear in 0.3.5.4-alpha):
9013 - Log additional info when we get a relay that shares an ed25519 ID
9014 with a different relay, instead making a BUG() warning. Fixes bug
9015 27800; bugfix on 0.3.2.1-alpha.
9017 o Minor bugfixes (directory connection shutdown, backport from 0.3.5.1-alpha):
9018 - Avoid a double-close when shutting down a stalled directory
9019 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
9021 o Minor bugfixes (HTTP tunnel, backport from 0.3.5.1-alpha):
9022 - Fix a bug warning when closing an HTTP tunnel connection due to an
9023 HTTP request we couldn't handle. Fixes bug 26470; bugfix
9026 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
9027 - Ensure circuitmux queues are empty before scheduling or sending
9028 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
9030 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
9031 - When the onion service directory can't be created or has the wrong
9032 permissions, do not log a stack trace. Fixes bug 27335; bugfix
9035 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
9036 - Close all SOCKS request (for the same .onion) if the newly fetched
9037 descriptor is unusable. Before that, we would close only the first
9038 one leaving the other hanging and let to time out by themselves.
9039 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
9041 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
9042 - When selecting a v3 rendezvous point, don't only look at the
9043 protover, but also check whether the curve25519 onion key is
9044 present. This way we avoid picking a relay that supports the v3
9045 rendezvous but for which we don't have the microdescriptor. Fixes
9046 bug 27797; bugfix on 0.3.2.1-alpha.
9048 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
9049 - Reject protocol names containing bytes other than alphanumeric
9050 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
9053 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
9054 - Compute protover votes correctly in the rust version of the
9055 protover code. Previously, the protover rewrite in 24031 allowed
9056 repeated votes from the same voter for the same protocol version
9057 to be counted multiple times in protover_compute_vote(). Fixes bug
9058 27649; bugfix on 0.3.3.5-rc.
9059 - Reject protover names that contain invalid characters. Fixes bug
9060 27687; bugfix on 0.3.3.1-alpha.
9062 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
9063 - protover_all_supported() would attempt to allocate up to 16GB on
9064 some inputs, leading to a potential memory DoS. Fixes bug 27206;
9065 bugfix on 0.3.3.5-rc.
9067 o Minor bugfixes (rust, directory authority, to appear in 0.3.5.4-alpha):
9068 - Fix an API mismatch in the rust implementation of
9069 protover_compute_vote(). This bug could have caused crashes on any
9070 directory authorities running Tor with Rust (which we do not yet
9071 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
9073 o Minor bugfixes (rust, to appear in 0.3.5.4-alpha):
9074 - Fix a potential null dereference in protover_all_supported(). Add
9075 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
9076 - Return a string that can be safely freed by C code, not one
9077 created by the rust allocator, in protover_all_supported(). Fixes
9078 bug 27740; bugfix on 0.3.3.1-alpha.
9080 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
9081 - If a unit test running in a subprocess exits abnormally or with a
9082 nonzero status code, treat the test as having failed, even if the
9083 test reported success. Without this fix, memory leaks don't cause
9084 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
9085 bugfix on 0.2.2.4-alpha.
9087 o Minor bugfixes (testing, backport from 0.3.5.3-alpha):
9088 - Make the hs_service tests use the same time source when creating
9089 the introduction point and when testing it. Now tests work better
9090 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
9093 o Minor bugfixes (testing, to appear in 0.3.5.4-alpha):
9094 - Treat backtrace test failures as expected on BSD-derived systems
9095 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
9096 (FreeBSD failures have been treated as expected since 18204 in
9097 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
9100 Changes in version 0.3.5.3-alpha - 2018-10-17
9101 Tor 0.3.5.3-alpha fixes several bugs, mostly from previous 0.3.5.x
9102 versions. One important fix for relays addresses a problem with rate-
9103 limiting code from back in 0.3.4.x: If the fix works out, we'll be
9104 backporting it soon. This release is still an alpha, but we hope it's
9105 getting closer and closer to stability.
9107 o Major features (onion services):
9108 - Version 3 onion services can now use the per-service
9109 HiddenServiceExportCircuitID option to differentiate client
9110 circuits. It communicates with the service by using the HAProxy
9111 protocol to assign virtual IP addresses to inbound client
9112 circuits. Closes ticket 4700. Patch by Mahrud Sayrafi.
9114 o Major bugfixes (compilation):
9115 - Fix compilation on ARM (and other less-used CPUs) when compiling
9116 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
9118 o Major bugfixes (initialization, crash):
9119 - Fix an assertion crash that would stop Tor from starting up if it
9120 tried to activate a periodic event too early. Fixes bug 27861;
9121 bugfix on 0.3.5.1-alpha.
9123 o Major bugfixes (mainloop, bootstrap):
9124 - Make sure Tor bootstraps and works properly if only the
9125 ControlPort is set. Prior to this fix, Tor would only bootstrap
9126 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
9127 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
9129 o Major bugfixes (relay):
9130 - When our write bandwidth limit is exhausted, stop writing on the
9131 connection. Previously, we had a typo in the code that would make
9132 us stop reading instead, leading to relay connections being stuck
9133 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
9136 o Minor features (continuous integration):
9137 - Use the Travis Homebrew addon to install packages on macOS during
9138 Travis CI. The package list is the same, but the Homebrew addon
9139 does not do a `brew update` by default. Implements ticket 27738.
9140 - Report what program produced the mysterious core file that we
9141 occasionally see on Travis CI during make distcheck. Closes
9144 o Minor features (geoip):
9145 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
9146 Country database. Closes ticket 27991.
9148 o Minor bugfixes (code safety):
9149 - Rewrite our assertion macros so that they no longer suppress the
9150 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
9153 o Minor bugfixes (compilation):
9154 - Compile the ed25519-donna code with a correct declaration of
9155 crypto_strongest_rand(). Previously, we built it with one type,
9156 but linked it against another in the unit tests, which caused
9157 compilation failures with LTO enabled. This could have caused
9158 other undefined behavior in the tests. Fixes bug 27728; bugfix
9161 o Minor bugfixes (compilation, netbsd):
9162 - Add a missing include back into procmon.c. Fixes bug 27990; bugfix
9165 o Minor bugfixes (continuous integration, appveyor):
9166 - Install only the necessary mingw packages during our appveyor
9167 builds. This change makes the build a little faster, and prevents
9168 a conflict with a preinstalled mingw openssl that appveyor now
9169 ships. Fixes bugs 27765 and 27943; bugfix on 0.3.4.2-alpha.
9171 o Minor bugfixes (directory permissions):
9172 - When a user requests a group-readable DataDirectory, give it to
9173 them. Previously, when the DataDirectory and the CacheDirectory
9174 were the same, the default setting (0) for
9175 CacheDirectoryGroupReadable would override the setting for
9176 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
9179 o Minor bugfixes (memory leaks):
9180 - Fix a small memory leak when calling Tor with --dump-config. Fixes
9181 bug 27893; bugfix on 0.3.2.1-alpha.
9183 o Minor bugfixes (networking):
9184 - In retry_listeners_ports(), make sure that we're removing a member
9185 of old_conns smartlist at most once. Fixes bug 27808; bugfix
9187 - Refrain from attempting socket rebinding when old and new
9188 listeners are in different address families. Fixes bug 27928;
9189 bugfix on 0.3.5.1-alpha.
9191 o Minor bugfixes (onion service v3):
9192 - Stop dumping a stack trace when trying to connect to an intro
9193 point without having a descriptor for it. Fixes bug 27774; bugfix
9195 - Don't warn so loudly when Tor is unable to decode an onion
9196 descriptor. This can now happen as a normal use case if a client
9197 gets a descriptor with client authorization but the client is not
9198 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
9199 - When selecting a v3 rendezvous point, don't only look at the
9200 protover, but also check whether the curve25519 onion key is
9201 present. This way we avoid picking a relay that supports the v3
9202 rendezvous but for which we don't have the microdescriptor. Fixes
9203 bug 27797; bugfix on 0.3.2.1-alpha.
9205 o Minor bugfixes (protover):
9206 - Reject protocol names containing bytes other than alphanumeric
9207 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
9210 o Minor bugfixes (testing):
9211 - Make the hs_service tests use the same time source when creating
9212 the introduction point and when testing it. Now tests work better
9213 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
9215 - In test_rebind.py, check if the Python version is in the supported
9216 range. Fixes bug 27675; bugfix on 0.3.5.1-alpha.
9218 o Code simplification and refactoring:
9219 - Divide more large Tor source files -- especially ones that span
9220 multiple areas of functionality -- into smaller parts, including
9221 onion.c and main.c. Closes ticket 26747.
9222 - Divide the "routerparse.c" module into separate modules for each
9223 group of parsed objects. Closes ticket 27924.
9224 - Move protover_rust.c to the same place protover.c was moved to.
9225 Closes ticket 27814.
9226 - Split directory.c into separate pieces for client, server, and
9227 common functionality. Closes ticket 26744.
9228 - Split the non-statistics-related parts from the rephist.c and
9229 geoip.c modules. Closes ticket 27892.
9230 - Split the router.c file into relay-only and shared components, to
9231 help with future modularization. Closes ticket 27864.
9234 - In the tor-resolve(1) manpage, fix the reference to socks-
9235 extensions.txt by adding a web URL. Resolves ticket 27853.
9236 - Mention that we require Python to be 2.7 or newer for some
9237 integration tests that we ship with Tor. Resolves ticket 27677.
9240 Changes in version 0.3.5.2-alpha - 2018-09-21
9241 Tor 0.3.5.2-alpha fixes several bugs in 0.3.5.1-alpha, including one
9242 that made Tor think it had run out of sockets. Anybody running a relay
9243 or an onion service on 0.3.5.1-alpha should upgrade.
9245 o Major bugfixes (relay bandwidth statistics):
9246 - When we close relayed circuits, report the data in the circuit
9247 queues as being written in our relay bandwidth stats. This
9248 mitigates guard discovery and other attacks that close circuits
9249 for the explicit purpose of noticing this discrepancy in
9250 statistics. Fixes bug 23512; bugfix on 0.0.8pre3.
9252 o Major bugfixes (socket accounting):
9253 - In our socket accounting code, count a socket as closed even when
9254 it is closed indirectly by the TLS layer. Previously, we would
9255 count these sockets as still in use, and incorrectly believe that
9256 we had run out of sockets. Fixes bug 27795; bugfix
9259 o Minor bugfixes (32-bit OSX and iOS, timing):
9260 - Fix an integer overflow bug in our optimized 32-bit millisecond-
9261 difference algorithm for 32-bit Apple platforms. Previously, it
9262 would overflow when calculating the difference between two times
9263 more than 47 days apart. Fixes part of bug 27139; bugfix
9265 - Improve the precision of our 32-bit millisecond difference
9266 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
9267 bugfix on 0.3.4.1-alpha.
9268 - Relax the tolerance on the mainloop/update_time_jumps test when
9269 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
9272 o Minor bugfixes (onion service v3):
9273 - Close all SOCKS request (for the same .onion) if the newly fetched
9274 descriptor is unusable. Before that, we would close only the first
9275 one leaving the other hanging and let to time out by themselves.
9276 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
9278 o Minor bugfixes (memory leak):
9279 - Fix an unlikely memory leak when trying to read a private key from
9280 a ridiculously large file. Fixes bug 27764; bugfix on
9281 0.3.5.1-alpha. This is CID 1439488.
9283 o Minor bugfixes (NSS):
9284 - Correctly detect failure to open a dummy TCP socket when stealing
9285 ownership of an fd from the NSS layer. Fixes bug 27782; bugfix
9288 o Minor bugfixes (rust):
9289 - protover_all_supported() would attempt to allocate up to 16GB on
9290 some inputs, leading to a potential memory DoS. Fixes bug 27206;
9291 bugfix on 0.3.3.5-rc.
9293 o Minor bugfixes (testing):
9294 - Revise the "conditionvar_timeout" test so that it succeeds even on
9295 heavily loaded systems where the test threads are not scheduled
9296 within 200 msec. Fixes bug 27073; bugfix on 0.2.6.3-alpha.
9298 o Code simplification and refactoring:
9299 - Divide the routerlist.c and dirserv.c modules into smaller parts.
9300 Closes ticket 27799.
9303 Changes in version 0.3.5.1-alpha - 2018-09-18
9304 Tor 0.3.5.1-alpha is the first release of the 0.3.5.x series. It adds
9305 client authorization for modern (v3) onion services, improves
9306 bootstrap reporting, begins reorganizing Tor's codebase, adds optional
9307 support for NSS in place of OpenSSL, and much more.
9309 o Major features (onion services, UI change):
9310 - For a newly created onion service, the default version is now 3.
9311 Tor still supports existing version 2 services, but the operator
9312 now needs to set "HiddenServiceVersion 2" in order to create a new
9313 version 2 service. For existing services, Tor now learns the
9314 version by reading the key file. Closes ticket 27215.
9316 o Major features (relay, UI change):
9317 - Relays no longer run as exits by default. If the "ExitRelay"
9318 option is auto (or unset), and no exit policy is specified with
9319 ExitPolicy or ReducedExitPolicy, we now treat ExitRelay as 0.
9320 Previously in this case, we allowed exit traffic and logged a
9321 warning message. Closes ticket 21530. Patch by Neel Chauhan.
9322 - Tor now validates that the ContactInfo config option is valid UTF-
9323 8 when parsing torrc. Closes ticket 27428.
9325 o Major features (bootstrap):
9326 - Don't report directory progress until after a connection to a
9327 relay or bridge has succeeded. Previously, we'd report 80%
9328 progress based on cached directory information when we couldn't
9329 even connect to the network. Closes ticket 27169.
9331 o Major features (new code layout):
9332 - Nearly all of Tor's source code has been moved around into more
9333 logical places. The "common" directory is now divided into a set
9334 of libraries in "lib", and files in the "or" directory have been
9335 split into "core" (logic absolutely needed for onion routing),
9336 "feature" (independent modules in Tor), and "app" (to configure
9337 and invoke the rest of Tor). See doc/HACKING/CodeStructure.md for
9338 more information. Closes ticket 26481.
9340 This refactoring is not complete: although the libraries have been
9341 refactored to be acyclic, the main body of Tor is still too
9342 interconnected. We will attempt to improve this in the future.
9344 o Major features (onion services v3):
9345 - Implement onion service client authorization at the descriptor
9346 level: only authorized clients can decrypt a service's descriptor
9347 to find out how to contact it. A new torrc option was added to
9348 control this client side: ClientOnionAuthDir <path>. On the
9349 service side, if the "authorized_clients/" directory exists in the
9350 onion service directory path, client configurations are read from
9351 the files within. See the manpage for more details. Closes ticket
9352 27547. Patch done by Suphanat Chunhapanya (haxxpop).
9353 - Improve revision counter generation in next-gen onion services.
9354 Onion services can now scale by hosting multiple instances on
9355 different hosts without synchronization between them, which was
9356 previously impossible because descriptors would get rejected by
9357 HSDirs. Addresses ticket 25552.
9359 o Major features (portability, cryptography, experimental, TLS):
9360 - Tor now has the option to compile with the NSS library instead of
9361 OpenSSL. This feature is experimental, and we expect that bugs may
9362 remain. It is mainly intended for environments where Tor's
9363 performance is not CPU-bound, and where NSS is already known to be
9364 installed. To try it out, configure Tor with the --enable-nss
9365 flag. Closes tickets 26631, 26815, and 26816.
9367 If you are experimenting with this option and using an old cached
9368 consensus, Tor may fail to start. To solve this, delete your
9369 "cached-consensus" and "cached-microdesc-consensus" files,
9370 (if present), and restart Tor.
9372 o Major bugfixes (directory authority):
9373 - Actually check that the address we get from DirAuthority
9374 configuration line is valid IPv4. Explicitly disallow DirAuthority
9375 address to be a DNS hostname. Fixes bug 26488; bugfix
9378 o Major bugfixes (restart-in-process):
9379 - Fix a use-after-free error that could be caused by passing Tor an
9380 impossible set of options that would fail during options_act().
9381 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
9383 o Minor features (admin tools):
9384 - Add a new --key-expiration option to print the expiration date of
9385 the signing cert in an ed25519_signing_cert file. Resolves
9388 o Minor features (build):
9389 - If you pass the "--enable-pic" option to configure, Tor will try
9390 to tell the compiler to build position-independent code suitable
9391 to link into a dynamic library. (The default remains -fPIE, for
9392 code suitable for a relocatable executable.) Closes ticket 23846.
9394 o Minor features (code correctness, testing):
9395 - Tor's build process now includes a "check-includes" make target to
9396 verify that no module of Tor relies on any headers from a higher-
9397 level module. We hope to use this feature over time to help
9398 refactor our codebase. Closes ticket 26447.
9400 o Minor features (code layout):
9401 - We have a new "lowest-level" error-handling API for use by code
9402 invoked from within the logging module. With this interface, the
9403 logging code is no longer at risk of calling into itself if a
9404 failure occurs while it is trying to log something. Closes
9407 o Minor features (compilation):
9408 - Tor's configure script now supports a --with-malloc= option to
9409 select your malloc implementation. Supported options are
9410 "tcmalloc", "jemalloc", "openbsd" (deprecated), and "system" (the
9411 default). Addresses part of ticket 20424. Based on a patch from
9414 o Minor features (config):
9415 - The "auto" keyword in torrc is now case-insensitive. Closes
9418 o Minor features (continuous integration):
9419 - Don't do a distcheck with --disable-module-dirauth in Travis.
9420 Implements ticket 27252.
9421 - Install libcap-dev and libseccomp2-dev so these optional
9422 dependencies get tested on Travis CI. Closes ticket 26560.
9423 - Only run one online rust build in Travis, to reduce network
9424 errors. Skip offline rust builds on Travis for Linux gcc, because
9425 they're redundant. Implements ticket 27252.
9426 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
9427 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
9428 Linux with default settings, because all the non-default builds
9429 use gcc on Linux. Implements ticket 27252.
9431 o Minor features (controller):
9432 - Emit CIRC_BW events as soon as we detect that we processed an
9433 invalid or otherwise dropped cell on a circuit. This allows
9434 vanguards and other controllers to react more quickly to dropped
9435 cells. Closes ticket 27678.
9436 - For purposes of CIRC_BW-based dropped cell detection, track half-
9437 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
9438 bias check cells to arrive without counting it as dropped until
9439 either the END arrives, or the windows are empty. Closes
9441 - Implement a 'GETINFO md/all' controller command to enable getting
9442 all known microdescriptors. Closes ticket 8323.
9443 - The GETINFO command now support an "uptime" argument, to return
9444 Tor's uptime in seconds. Closes ticket 25132.
9446 o Minor features (denial-of-service avoidance):
9447 - Make our OOM handler aware of the DNS cache so that it doesn't
9448 fill up the memory. This check is important for our DoS mitigation
9449 subsystem. Closes ticket 18642. Patch by Neel Chauhan.
9451 o Minor features (development):
9452 - Tor's makefile now supports running the "clippy" Rust style tool
9453 on our Rust code. Closes ticket 22156.
9455 o Minor features (directory authority):
9456 - There is no longer an artificial upper limit on the length of
9457 bandwidth lines. Closes ticket 26223.
9458 - When a bandwidth file is used to obtain the bandwidth measurements,
9459 include this bandwidth file headers in the votes. Closes
9461 - Improved support for networks with only a single authority or a
9462 single fallback directory. Patch from Gabriel Somlo. Closes
9465 o Minor features (embedding API):
9466 - The Tor controller API now supports a function to launch Tor with
9467 a preconstructed owning controller FD, so that embedding
9468 applications don't need to manage controller ports and
9469 authentication. Closes ticket 24204.
9470 - The Tor controller API now has a function that returns the name
9471 and version of the backend implementing the API. Closes
9474 o Minor features (geoip):
9475 - Update geoip and geoip6 to the September 6 2018 Maxmind GeoLite2
9476 Country database. Closes ticket 27631.
9478 o Minor features (memory management):
9479 - Get Libevent to use the same memory allocator as Tor, by calling
9480 event_set_mem_functions() during initialization. Resolves
9483 o Minor features (memory usage):
9484 - When not using them, store legacy TAP public onion keys in DER-
9485 encoded format, rather than as expanded public keys. This should
9486 save several megabytes on typical clients. Closes ticket 27246.
9488 o Minor features (OpenSSL):
9489 - When possible, use RFC5869 HKDF implementation from OpenSSL rather
9490 than our own. Resolves ticket 19979.
9492 o Minor features (Rust, code quality):
9493 - Improve rust code quality in the rust protover implementation by
9494 making it more idiomatic. Includes changing an internal API to
9495 take &str instead of &String. Closes ticket 26492.
9497 o Minor features (testing):
9498 - Add scripts/test/chutney-git-bisect.sh, for bisecting using
9499 chutney. Implements ticket 27211.
9501 o Minor features (tor-resolve):
9502 - The tor-resolve utility can now be used with IPv6 SOCKS proxies.
9503 Side-effect of the refactoring for ticket 26526.
9505 o Minor features (UI):
9506 - Log each included configuration file or directory as we read it,
9507 to provide more visibility about where Tor is reading from. Patch
9508 from Unto Sten; closes ticket 27186.
9509 - Lower log level of "Scheduler type KIST has been enabled" to INFO.
9510 Closes ticket 26703.
9512 o Minor bugfixes (bootstrap):
9513 - Try harder to get descriptors in non-exit test networks, by using
9514 the mid weight for the third hop when there are no exits. Fixes
9515 bug 27237; bugfix on 0.2.6.2-alpha.
9517 o Minor bugfixes (C correctness):
9518 - Avoid casting smartlist index to int implicitly, as it may trigger
9519 a warning (-Wshorten-64-to-32). Fixes bug 26282; bugfix on
9520 0.2.3.13-alpha, 0.2.7.1-alpha and 0.2.1.1-alpha.
9521 - Use time_t for all values in
9522 predicted_ports_prediction_time_remaining(). Rework the code that
9523 computes difference between durations/timestamps. Fixes bug 27165;
9524 bugfix on 0.3.1.1-alpha.
9526 o Minor bugfixes (client, memory usage):
9527 - When not running as a directory cache, there is no need to store
9528 the text of the current consensus networkstatus in RAM.
9529 Previously, however, clients would store it anyway, at a cost of
9530 over 5 MB. Now, they do not. Fixes bug 27247; bugfix
9533 o Minor bugfixes (client, reachableaddresses):
9534 - Instead of adding a "reject *:*" line to ReachableAddresses when
9535 loading the configuration, add one to the policy after parsing it
9536 in parse_reachable_addresses(). This prevents extra "reject *.*"
9537 lines from accumulating on reloads. Fixes bug 20874; bugfix on
9538 0.1.1.5-alpha. Patch by Neel Chauhan.
9540 o Minor bugfixes (code quality):
9541 - Rename sandbox_getaddrinfo() and other functions to no longer
9542 misleadingly suggest that they are sandbox-only. Fixes bug 26525;
9543 bugfix on 0.2.7.1-alpha.
9545 o Minor bugfixes (configuration, Onion Services):
9546 - In rend_service_parse_port_config(), disallow any input to remain
9547 after address-port pair was parsed. This will catch address and
9548 port being whitespace-separated by mistake of the user. Fixes bug
9549 27044; bugfix on 0.2.9.10.
9551 o Minor bugfixes (continuous integration):
9552 - Stop reinstalling identical packages in our Windows CI. Fixes bug
9553 27464; bugfix on 0.3.4.1-alpha.
9555 o Minor bugfixes (controller):
9556 - Consider all routerinfo errors other than "not a server" to be
9557 transient for the purpose of "GETINFO exit-policy/*" controller
9558 request. Print stacktrace in the unlikely case of failing to
9559 recompute routerinfo digest. Fixes bug 27034; bugfix
9562 o Minor bugfixes (directory connection shutdown):
9563 - Avoid a double-close when shutting down a stalled directory
9564 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
9566 o Minor bugfixes (HTTP tunnel):
9567 - Fix a bug warning when closing an HTTP tunnel connection due to an
9568 HTTP request we couldn't handle. Fixes bug 26470; bugfix
9571 o Minor bugfixes (ipv6):
9572 - In addrs_in_same_network_family(), we choose the subnet size based
9573 on the IP version (IPv4 or IPv6). Previously, we chose a fixed
9574 subnet size of /16 for both IPv4 and IPv6 addresses. Fixes bug
9575 15518; bugfix on 0.2.3.1-alpha. Patch by Neel Chauhan.
9577 o Minor bugfixes (logging):
9578 - As a precaution, do an early return from log_addr_has_changed() if
9579 Tor is running as client. Also, log a stack trace for debugging as
9580 this function should only be called when Tor runs as server. Fixes
9581 bug 26892; bugfix on 0.1.1.9-alpha.
9582 - Refrain from mentioning bug 21018 in the logs, as it is already
9583 fixed. Fixes bug 25477; bugfix on 0.2.9.8.
9585 o Minor bugfixes (logging, documentation):
9586 - When SafeLogging is enabled, scrub IP address in
9587 channel_tls_process_netinfo_cell(). Also, add a note to manpage
9588 that scrubbing is not guaranteed on loglevels below Notice. Fixes
9589 bug 26882; bugfix on 0.2.4.10-alpha.
9591 o Minor bugfixes (netflow padding):
9592 - Ensure circuitmux queues are empty before scheduling or sending
9593 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
9595 o Minor bugfixes (onion service v2):
9596 - Log at level "info", not "warning", in the case that we do not
9597 have a consensus when a .onion request comes in. This can happen
9598 normally while bootstrapping. Fixes bug 27040; bugfix
9601 o Minor bugfixes (onion service v3):
9602 - When the onion service directory can't be created or has the wrong
9603 permissions, do not log a stack trace. Fixes bug 27335; bugfix
9606 o Minor bugfixes (OS compatibility):
9607 - Properly handle configuration changes that move a listener to/from
9608 wildcard IP address. If the first attempt to bind a socket fails,
9609 close the old listener and try binding the socket again. Fixes bug
9610 17873; bugfix on 0.0.8pre-1.
9612 o Minor bugfixes (performance)::
9613 - Rework node_is_a_configured_bridge() to no longer call
9614 node_get_all_orports(), which was performing too many memory
9615 allocations. Fixes bug 27224; bugfix on 0.2.3.9.
9617 o Minor bugfixes (relay statistics):
9618 - Update relay descriptor on bandwidth changes only when the uptime
9619 is smaller than 24h, in order to reduce the efficiency of guard
9620 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
9622 o Minor bugfixes (relays):
9623 - Consider the fact that we'll be making direct connections to our
9624 entry and guard nodes when computing the fraction of nodes that
9625 have their descriptors. Also, if we are using bridges and there is
9626 at least one bridge with a full descriptor, treat the fraction of
9627 guards available as 100%. Fixes bug 25886; bugfix on 0.2.4.10-alpha.
9628 Patch by Neel Chauhan.
9629 - Update the message logged on relays when DirCache is disabled.
9630 Since 0.3.3.5-rc, authorities require DirCache (V2Dir) for the
9631 Guard flag. Fixes bug 24312; bugfix on 0.3.3.5-rc.
9633 o Minor bugfixes (rust, protover):
9634 - Compute protover votes correctly in the rust version of the
9635 protover code. Previously, the protover rewrite in 24031 allowed
9636 repeated votes from the same voter for the same protocol version
9637 to be counted multiple times in protover_compute_vote(). Fixes bug
9638 27649; bugfix on 0.3.3.5-rc.
9639 - Reject protover names that contain invalid characters. Fixes bug
9640 27687; bugfix on 0.3.3.1-alpha.
9642 o Minor bugfixes (testing):
9643 - Fix two unit tests to work when HOME environment variable is not
9644 set. Fixes bug 27096; bugfix on 0.2.8.1-alpha.
9645 - If a unit test running in a subprocess exits abnormally or with a
9646 nonzero status code, treat the test as having failed, even if the
9647 test reported success. Without this fix, memory leaks don't cause
9648 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
9649 bugfix on 0.2.2.4-alpha.
9650 - When logging a version mismatch in our openssl_version tests,
9651 report the actual offending version strings. Fixes bug 26152;
9652 bugfix on 0.2.9.1-alpha.
9653 - Fix forking tests on Windows when there is a space somewhere in
9654 the path. Fixes bug 26437; bugfix on 0.2.2.4-alpha.
9656 o Code simplification and refactoring:
9657 - 'updateFallbackDirs.py' now ignores the blacklist file, as it's not
9658 longer needed. Closes ticket 26502.
9659 - Include paths to header files within Tor are now qualified by
9660 directory within the top-level src directory.
9661 - Many structures have been removed from the centralized "or.h"
9662 header, and moved into their own headers. This will allow us to
9663 reduce the number of places in the code that rely on each
9664 structure's contents and layout. Closes ticket 26383.
9665 - Remove ATTR_NONNULL macro from codebase. Resolves ticket 26527.
9666 - Remove GetAdaptersAddresses_fn_t. The code that used it was
9667 removed as part of the 26481 refactor. Closes ticket 27467.
9668 - Rework Tor SOCKS server code to use Trunnel and benefit from
9669 autogenerated functions for parsing and generating SOCKS wire
9670 format. New implementation is cleaner, more maintainable and
9671 should be less prone to heartbleed-style vulnerabilities.
9672 Implements a significant fraction of ticket 3569.
9673 - Split sampled_guards_update_from_consensus() and
9674 select_entry_guard_for_circuit() into subfunctions. In
9675 entry_guards_update_primary() unite three smartlist enumerations
9676 into one and move smartlist comparison code out of the function.
9677 Closes ticket 21349.
9678 - Tor now assumes that you have standards-conformant stdint.h and
9679 inttypes.h headers when compiling. Closes ticket 26626.
9680 - Unify our bloom filter logic. Previously we had two copies of this
9681 code: one for routerlist filtering, and one for address set
9682 calculations. Closes ticket 26510.
9683 - Use the simpler strcmpstart() helper in
9684 rend_parse_v2_service_descriptor instead of strncmp(). Closes
9686 - Utility functions that can perform a DNS lookup are now wholly
9687 separated from those that can't, in separate headers and C
9688 modules. Closes ticket 26526.
9691 - Copy paragraph and URL to Tor's code of conduct document from
9692 CONTRIBUTING to new CODE_OF_CONDUCT file. Resolves ticket 26638.
9693 - Remove old instructions from INSTALL document. Closes ticket 26588.
9694 - Warn users that they should not include MyFamily line(s) in their
9695 torrc when running Tor bridge. Closes ticket 26908.
9698 - Tor no longer supports building with the dmalloc library. For
9699 debugging memory issues, we suggest using gperftools or msan
9700 instead. Closes ticket 26426.
9701 - Tor no longer attempts to run on Windows environments without the
9702 GetAdaptersAddresses() function. This function has existed since
9703 Windows XP, which is itself already older than we support.
9704 - Remove Tor2web functionality for version 2 onion services. The
9705 Tor2webMode and Tor2webRendezvousPoints options are now obsolete.
9706 (This feature was never shipped in vanilla Tor and it was only
9707 possible to use this feature by building the support at compile
9708 time. Tor2webMode is not implemented for version 3 onion services.)
9709 Closes ticket 26367.
9712 Changes in version 0.2.9.17 - 2018-09-10
9713 Tor 0.2.9.17 backports numerous bugfixes from later versions of Tor.
9715 o Minor features (compatibility, backport from 0.3.4.8):
9716 - Tell OpenSSL to maintain backward compatibility with previous
9717 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
9718 ciphers are disabled by default. Closes ticket 27344.
9720 o Minor features (continuous integration, backport from 0.3.4.7-rc):
9721 - Enable macOS builds in our Travis CI configuration. Closes
9723 - Install libcap-dev and libseccomp2-dev so these optional
9724 dependencies get tested on Travis CI. Closes ticket 26560.
9725 - Run asciidoc during Travis CI. Implements ticket 27087.
9726 - Use ccache in our Travis CI configuration. Closes ticket 26952.
9728 o Minor features (geoip):
9729 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
9730 Country database. Closes ticket 27089.
9732 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
9733 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
9734 tell the compiler not to include the system malloc implementation.
9735 Fixes bug 20424; bugfix on 0.2.0.20-rc.
9737 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
9738 - Silence a spurious compiler warning on the GetAdaptersAddresses
9739 function pointer cast. This issue is already fixed by 26481 in
9740 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
9741 bugfix on 0.2.3.11-alpha.
9742 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
9743 supported, and always fails. Some compilers warn about the
9744 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
9747 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
9748 - Don't link or search for pthreads when building for Windows, even
9749 if we are using build environment (like mingw) that provides a
9750 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
9752 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
9753 - Skip a pair of unreliable key generation tests on Windows, until
9754 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
9755 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
9757 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
9758 - Pass the module flags to distcheck configure, and log the flags
9759 before running configure. (Backported to 0.2.9 and later as a
9760 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
9762 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
9763 - When a Travis build fails, and showing a log fails, keep trying to
9764 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
9765 - When we use echo in Travis, don't pass a --flag as the first
9766 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
9768 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
9769 - When voting for recommended versions, make sure that all of the
9770 versions are well-formed and parsable. Fixes bug 26485; bugfix
9773 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
9774 - Fix a bug in out sandboxing rules for the openat() syscall.
9775 Previously, no openat() call would be permitted, which would break
9776 filesystem operations on recent glibc versions. Fixes bug 25440;
9777 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
9779 o Minor bugfixes (onion services, backport from 0.3.4.8):
9780 - Silence a spurious compiler warning in
9781 rend_client_send_introduction(). Fixes bug 27463; bugfix
9784 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
9785 - Log a protocol warning when single onion services or Tor2web clients
9786 fail to authenticate direct connections to relays.
9787 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
9789 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
9790 - Disable core dumps in test_bt.sh, to avoid failures in "make
9791 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
9793 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
9794 - Before running make test-network-all, delete old logs and test
9795 result files, to avoid spurious failures. Fixes bug 27295; bugfix
9798 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
9799 - Our "tortls/cert_matches_key" unit test no longer relies on
9800 OpenSSL internals. Previously, it relied on unsupported OpenSSL
9801 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
9802 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
9804 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
9805 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
9806 27185; bugfix on 0.2.2.2-alpha.
9809 Changes in version 0.3.2.12 - 2018-09-10
9810 Tor 0.3.2.12 backport numerous fixes from later versions of Tor.
9812 o Minor features (compatibility, backport from 0.3.4.8):
9813 - Tell OpenSSL to maintain backward compatibility with previous
9814 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
9815 ciphers are disabled by default. Closes ticket 27344.
9817 o Minor features (continuous integration, backport from 0.3.4.7-rc):
9818 - Enable macOS builds in our Travis CI configuration. Closes
9820 - Install libcap-dev and libseccomp2-dev so these optional
9821 dependencies get tested on Travis CI. Closes ticket 26560.
9822 - Run asciidoc during Travis CI. Implements ticket 27087.
9823 - Use ccache in our Travis CI configuration. Closes ticket 26952.
9825 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
9826 - Use cargo cache in our Travis CI configuration. Closes
9829 o Minor features (controller, backport from 0.3.4.6-rc):
9830 - The control port now exposes the list of HTTPTunnelPorts and
9831 ExtOrPorts via GETINFO net/listeners/httptunnel and
9832 net/listeners/extor respectively. Closes ticket 26647.
9834 o Minor features (directory authorities, backport from 0.3.4.7-rc):
9835 - Authorities no longer vote to make the subprotocol version
9836 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
9837 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
9839 o Minor features (geoip):
9840 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
9841 Country database. Closes ticket 27089.
9843 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
9844 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
9845 tell the compiler not to include the system malloc implementation.
9846 Fixes bug 20424; bugfix on 0.2.0.20-rc.
9847 - Don't try to use a pragma to temporarily disable the
9848 -Wunused-const-variable warning if the compiler doesn't support
9849 it. Fixes bug 26785; bugfix on 0.3.2.11.
9851 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
9852 - Silence a spurious compiler warning on the GetAdaptersAddresses
9853 function pointer cast. This issue is already fixed by 26481 in
9854 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
9855 bugfix on 0.2.3.11-alpha.
9856 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
9857 supported, and always fails. Some compilers warn about the
9858 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
9861 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
9862 - Don't link or search for pthreads when building for Windows, even
9863 if we are using build environment (like mingw) that provides a
9864 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
9866 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
9867 - Skip a pair of unreliable key generation tests on Windows, until
9868 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
9869 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
9871 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
9872 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
9873 - Pass the module flags to distcheck configure, and log the flags
9874 before running configure. (Backported to 0.2.9 and later as a
9875 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
9877 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
9878 - When a Travis build fails, and showing a log fails, keep trying to
9879 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
9880 - When we use echo in Travis, don't pass a --flag as the first
9881 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
9883 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
9884 - When voting for recommended versions, make sure that all of the
9885 versions are well-formed and parsable. Fixes bug 26485; bugfix
9888 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
9889 - Fix a bug in out sandboxing rules for the openat() syscall.
9890 Previously, no openat() call would be permitted, which would break
9891 filesystem operations on recent glibc versions. Fixes bug 25440;
9892 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
9894 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
9895 - Improve the log message when connection initiators fail to
9896 authenticate direct connections to relays. Fixes bug 26927; bugfix
9899 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
9900 - Fix bug that causes services to not ever rotate their descriptors
9901 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
9904 o Minor bugfixes (onion services, backport from 0.3.4.8):
9905 - Silence a spurious compiler warning in
9906 rend_client_send_introduction(). Fixes bug 27463; bugfix
9909 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
9910 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
9912 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
9913 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
9914 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
9915 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
9917 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
9918 - Log a protocol warning when single onion services or Tor2web clients
9919 fail to authenticate direct connections to relays.
9920 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
9922 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
9923 - Disable core dumps in test_bt.sh, to avoid failures in "make
9924 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
9926 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
9927 - When running make test-network-all, use the mixed+hs-v2 network.
9928 (A previous fix to chutney removed v3 onion services from the
9929 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
9930 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
9931 - Before running make test-network-all, delete old logs and test
9932 result files, to avoid spurious failures. Fixes bug 27295; bugfix
9935 o Minor bugfixes (testing, openssl compatibility):
9936 - Our "tortls/cert_matches_key" unit test no longer relies on OpenSSL
9937 internals. Previously, it relied on unsupported OpenSSL behavior in
9938 a way that caused it to crash with OpenSSL 1.0.2p. Fixes bug 27226;
9939 bugfix on 0.2.5.1-alpha.
9941 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
9942 - Our "tortls/cert_matches_key" unit test no longer relies on
9943 OpenSSL internals. Previously, it relied on unsupported OpenSSL
9944 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
9945 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
9947 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
9948 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
9949 27185; bugfix on 0.2.2.2-alpha.
9952 Changes in version 0.3.3.10 - 2018-09-10
9953 Tor 0.3.3.10 backports numerous fixes from later versions of Tor.
9955 o Minor features (bug workaround, backport from 0.3.4.7-rc):
9956 - Compile correctly on systems that provide the C11 stdatomic.h
9957 header, but where C11 atomic functions don't actually compile.
9958 Closes ticket 26779; workaround for Debian issue 903709.
9960 o Minor features (compatibility, backport from 0.3.4.8):
9961 - Tell OpenSSL to maintain backward compatibility with previous
9962 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
9963 ciphers are disabled by default. Closes ticket 27344.
9965 o Minor features (continuous integration, backport from 0.3.4.7-rc):
9966 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
9967 - Enable macOS builds in our Travis CI configuration. Closes
9969 - Install libcap-dev and libseccomp2-dev so these optional
9970 dependencies get tested on Travis CI. Closes ticket 26560.
9971 - Run asciidoc during Travis CI. Implements ticket 27087.
9972 - Use ccache in our Travis CI configuration. Closes ticket 26952.
9974 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
9975 - Use cargo cache in our Travis CI configuration. Closes
9978 o Minor features (controller, backport from 0.3.4.6-rc):
9979 - The control port now exposes the list of HTTPTunnelPorts and
9980 ExtOrPorts via GETINFO net/listeners/httptunnel and
9981 net/listeners/extor respectively. Closes ticket 26647.
9983 o Minor features (directory authorities, backport from 0.3.4.7-rc):
9984 - Authorities no longer vote to make the subprotocol version
9985 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
9986 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
9988 o Minor features (geoip):
9989 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
9990 Country database. Closes ticket 27089.
9992 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
9993 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
9994 tell the compiler not to include the system malloc implementation.
9995 Fixes bug 20424; bugfix on 0.2.0.20-rc.
9996 - Don't try to use a pragma to temporarily disable the
9997 -Wunused-const-variable warning if the compiler doesn't support
9998 it. Fixes bug 26785; bugfix on 0.3.2.11.
10000 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
10001 - Silence a spurious compiler warning on the GetAdaptersAddresses
10002 function pointer cast. This issue is already fixed by 26481 in
10003 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
10004 bugfix on 0.2.3.11-alpha.
10005 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
10006 supported, and always fails. Some compilers warn about the
10007 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
10010 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
10011 - Don't link or search for pthreads when building for Windows, even
10012 if we are using build environment (like mingw) that provides a
10013 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
10015 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
10016 - Skip a pair of unreliable key generation tests on Windows, until
10017 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
10018 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
10020 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
10021 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
10022 - Pass the module flags to distcheck configure, and log the flags
10023 before running configure. (Backported to 0.2.9 and later as a
10024 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
10026 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
10027 - When a Travis build fails, and showing a log fails, keep trying to
10028 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
10029 - When we use echo in Travis, don't pass a --flag as the first
10030 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
10032 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
10033 - When voting for recommended versions, make sure that all of the
10034 versions are well-formed and parsable. Fixes bug 26485; bugfix
10037 o Minor bugfixes (in-process restart, backport from 0.3.4.7-rc):
10038 - Always call tor_free_all() when leaving tor_run_main(). When we
10039 did not, restarting tor in-process would cause an assertion
10040 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
10042 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
10043 - Fix a bug in our sandboxing rules for the openat() syscall.
10044 Previously, no openat() call would be permitted, which would break
10045 filesystem operations on recent glibc versions. Fixes bug 25440;
10046 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
10048 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
10049 - Improve the log message when connection initiators fail to
10050 authenticate direct connections to relays. Fixes bug 26927; bugfix
10053 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
10054 - Fix bug that causes services to not ever rotate their descriptors
10055 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
10058 o Minor bugfixes (onion services, backport from 0.3.4.8):
10059 - Silence a spurious compiler warning in
10060 rend_client_send_introduction(). Fixes bug 27463; bugfix
10063 o Minor bugfixes (portability, backport from 0.3.4.6-rc):
10064 - Work around two different bugs in the OS X 10.10 and later SDKs
10065 that would prevent us from successfully targeting earlier versions
10066 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
10068 o Minor bugfixes (portability, backport from 0.3.4.7-rc):
10069 - Fix compilation of the unit tests on GNU/Hurd, which does not
10070 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
10073 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
10074 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
10076 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
10077 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
10078 - Protover parsing was accepting the presence of whitespace in
10079 version strings, which the C implementation would choke on, e.g.
10080 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
10081 - Protover parsing was ignoring a 2nd hyphen and everything after
10082 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
10084 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
10085 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
10086 - cd to ${abs_top_builddir}/src/rust before running cargo in
10087 src/test/test_rust.sh. This makes the working directory consistent
10088 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
10090 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
10091 - Log a protocol warning when single onion services or Tor2web clients
10092 fail to authenticate direct connections to relays.
10093 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
10095 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
10096 - Disable core dumps in test_bt.sh, to avoid failures in "make
10097 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
10099 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
10100 - When running make test-network-all, use the mixed+hs-v2 network.
10101 (A previous fix to chutney removed v3 onion services from the
10102 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
10103 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
10104 - Before running make test-network-all, delete old logs and test
10105 result files, to avoid spurious failures. Fixes bug 27295; bugfix
10108 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
10109 - Our "tortls/cert_matches_key" unit test no longer relies on
10110 OpenSSL internals. Previously, it relied on unsupported OpenSSL
10111 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
10112 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
10114 o Minor bugfixes (v3 onion services, backport from 0.3.4.6-rc):
10115 - Stop sending ed25519 link specifiers in v3 onion service introduce
10116 cells and descriptors, when the rendezvous or introduction point
10117 doesn't support ed25519 link authentication. Fixes bug 26627;
10118 bugfix on 0.3.2.4-alpha.
10120 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
10121 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
10122 27185; bugfix on 0.2.2.2-alpha.
10125 Changes in version 0.3.4.8 - 2018-09-10
10126 Tor 0.3.4.8 is the first stable release in its series; it includes
10127 compilation and portability fixes.
10129 The Tor 0.3.4 series includes improvements for running Tor in
10130 low-power and embedded environments, which should help performance in
10131 general. We've begun work on better modularity, and included preliminary
10132 changes on the directory authority side to accommodate a new bandwidth
10133 measurement system. We've also integrated more continuous-integration
10134 systems into our development process, and made corresponding changes to
10135 Tor's testing infrastructure. Finally, we've continued to refine
10136 our anti-denial-of-service code.
10138 Below are the changes since 0.3.4.7-rc. For a complete list of changes
10139 since 0.3.3.9, see the ReleaseNotes file.
10141 o Minor features (compatibility):
10142 - Tell OpenSSL to maintain backward compatibility with previous
10143 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
10144 ciphers are disabled by default. Closes ticket 27344.
10146 o Minor features (continuous integration):
10147 - Log the compiler path and version during Appveyor builds.
10148 Implements ticket 27449.
10149 - Show config.log and test-suite.log after failed Appveyor builds.
10150 Also upload the zipped full logs as a build artifact. Implements
10153 o Minor bugfixes (compilation):
10154 - Silence a spurious compiler warning on the GetAdaptersAddresses
10155 function pointer cast. This issue is already fixed by 26481 in
10156 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
10157 bugfix on 0.2.3.11-alpha.
10158 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
10159 supported, and always fails. Some compilers warn about the
10160 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
10163 o Minor bugfixes (continuous integration):
10164 - Disable gcc hardening in Appveyor Windows 64-bit builds. As of
10165 August 29 2018, Appveyor images come with gcc 8.2.0 by default.
10166 Executables compiled for 64-bit Windows with this version of gcc
10167 crash when Tor's --enable-gcc-hardening flag is set. Fixes bug
10168 27460; bugfix on 0.3.4.1-alpha.
10169 - When a Travis build fails, and showing a log fails, keep trying to
10170 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
10171 - When we use echo in Travis, don't pass a --flag as the first
10172 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
10174 o Minor bugfixes (onion services):
10175 - Silence a spurious compiler warning in
10176 rend_client_send_introduction(). Fixes bug 27463; bugfix
10179 o Minor bugfixes (testing, chutney):
10180 - When running make test-network-all, use the mixed+hs-v2 network.
10181 (A previous fix to chutney removed v3 onion services from the
10182 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
10183 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
10184 - Before running make test-network-all, delete old logs and test
10185 result files, to avoid spurious failures. Fixes bug 27295; bugfix
10188 Changes in version 0.3.4.7-rc - 2018-08-24
10189 Tor 0.3.4.7-rc fixes several small compilation, portability, and
10190 correctness issues in previous versions of Tor. This version is a
10191 release candidate: if no serious bugs are found, we expect that the
10192 stable 0.3.4 release will be (almost) the same as this release.
10194 o Minor features (bug workaround):
10195 - Compile correctly on systems that provide the C11 stdatomic.h
10196 header, but where C11 atomic functions don't actually compile.
10197 Closes ticket 26779; workaround for Debian issue 903709.
10199 o Minor features (continuous integration):
10200 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
10201 - Enable macOS builds in our Travis CI configuration. Closes
10203 - Install libcap-dev and libseccomp2-dev so these optional
10204 dependencies get tested on Travis CI. Closes ticket 26560.
10205 - Only post Appveyor IRC notifications when the build fails.
10206 Implements ticket 27275.
10207 - Run asciidoc during Travis CI. Implements ticket 27087.
10208 - Use ccache in our Travis CI configuration. Closes ticket 26952.
10210 o Minor features (continuous integration, rust):
10211 - Use cargo cache in our Travis CI configuration. Closes
10214 o Minor features (directory authorities):
10215 - Authorities no longer vote to make the subprotocol version
10216 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
10217 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
10219 o Minor features (geoip):
10220 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
10221 Country database. Closes ticket 27089.
10223 o Minor bugfixes (compilation, windows):
10224 - Don't link or search for pthreads when building for Windows, even
10225 if we are using build environment (like mingw) that provides a
10226 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
10228 o Minor bugfixes (continuous integration):
10229 - Improve Appveyor CI IRC logging. Generate correct branches and
10230 URLs for pull requests and tags. Use unambiguous short commits.
10231 Fixes bug 26979; bugfix on master.
10232 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
10233 - Pass the module flags to distcheck configure, and log the flags
10234 before running configure. (Backported to 0.2.9 and later as a
10235 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
10237 o Minor bugfixes (in-process restart):
10238 - Always call tor_free_all() when leaving tor_run_main(). When we
10239 did not, restarting tor in-process would cause an assertion
10240 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
10242 o Minor bugfixes (linux seccomp2 sandbox):
10243 - Fix a bug in out sandboxing rules for the openat() syscall.
10244 Previously, no openat() call would be permitted, which would break
10245 filesystem operations on recent glibc versions. Fixes bug 25440;
10246 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
10248 o Minor bugfixes (onion services):
10249 - Fix bug that causes services to not ever rotate their descriptors
10250 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
10253 o Minor bugfixes (portability):
10254 - Fix compilation of the unit tests on GNU/Hurd, which does not
10255 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
10258 o Minor bugfixes (rust):
10259 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
10261 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
10262 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
10263 - Protover parsing was accepting the presence of whitespace in
10264 version strings, which the C implementation would choke on, e.g.
10265 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
10266 - Protover parsing was ignoring a 2nd hyphen and everything after
10267 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
10269 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
10270 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
10271 - cd to ${abs_top_builddir}/src/rust before running cargo in
10272 src/test/test_rust.sh. This makes the working directory consistent
10273 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
10275 o Minor bugfixes (testing, bootstrap):
10276 - When calculating bootstrap progress, check exit policies and the
10277 exit flag. Previously, Tor would only check the exit flag, which
10278 caused race conditions in small and fast networks like chutney.
10279 Fixes bug 27236; bugfix on 0.2.6.3-alpha.
10281 o Minor bugfixes (testing, openssl compatibility):
10282 - Our "tortls/cert_matches_key" unit test no longer relies on
10283 OpenSSL internals. Previously, it relied on unsupported OpenSSL
10284 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
10285 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
10287 o Minor bugfixes (Windows, compilation):
10288 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
10289 27185; bugfix on 0.2.2.2-alpha.
10292 Changes in version 0.3.4.6-rc - 2018-08-06
10293 Tor 0.3.4.6-rc fixes several small compilation, portability, and
10294 correctness issues in previous versions of Tor. This version is a
10295 release candidate: if no serious bugs are found, we expect that the
10296 stable 0.3.4 release will be (almost) the same as this release.
10298 o Major bugfixes (event scheduler):
10299 - When we enable a periodic event, schedule it in the event loop
10300 rather than running it immediately. Previously, we would re-run
10301 periodic events immediately in the middle of (for example)
10302 changing our options, with unpredictable effects. Fixes bug 27003;
10303 bugfix on 0.3.4.1-alpha.
10305 o Minor features (compilation):
10306 - When building Tor, prefer to use Python 3 over Python 2, and more
10307 recent (contemplated) versions over older ones. Closes
10309 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
10310 tell the compiler not to include the system malloc implementation.
10311 Fixes bug 20424; bugfix on 0.2.0.20-rc.
10312 - Don't try to use a pragma to temporarily disable the
10313 -Wunused-const-variable warning if the compiler doesn't support
10314 it. Fixes bug 26785; bugfix on 0.3.2.11.
10316 o Minor bugfixes (continuous integration):
10317 - Skip a pair of unreliable key generation tests on Windows, until
10318 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
10319 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
10321 o Minor features (controller):
10322 - The control port now exposes the list of HTTPTunnelPorts and
10323 ExtOrPorts via GETINFO net/listeners/httptunnel and
10324 net/listeners/extor respectively. Closes ticket 26647.
10326 o Minor bugfixes (directory authority):
10327 - When voting for recommended versions, make sure that all of the
10328 versions are well-formed and parsable. Fixes bug 26485; bugfix
10331 o Minor features (geoip):
10332 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10333 Country database. Closes ticket 26674.
10335 o Minor features (Rust, portability):
10336 - Rust cross-compilation is now supported. Closes ticket 25895.
10338 o Minor bugfixes (compilation):
10339 - Update build system so that tor builds again with --disable-unittests
10340 after recent refactoring. Fixes bug 26789; bugfix on 0.3.4.3-alpha.
10341 - Fix a compilation warning on some versions of GCC when building
10342 code that calls routerinfo_get_my_routerinfo() twice, assuming
10343 that the second call will succeed if the first one did. Fixes bug
10344 26269; bugfix on 0.2.8.2-alpha.
10346 o Minor bugfixes (controller):
10347 - Report the port correctly when a port is configured to bind to
10348 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
10349 - Parse the "HSADDRESS=" parameter in HSPOST commands properly.
10350 Previously, it was misparsed and ignored. Fixes bug 26523; bugfix
10351 on 0.3.3.1-alpha. Patch by "akwizgran".
10353 o Minor bugfixes (correctness, flow control):
10354 - Upon receiving a stream-level SENDME cell, verify that our window
10355 has not grown too large. Fixes bug 26214; bugfix on svn
10358 o Minor bugfixes (memory, correctness):
10359 - Fix a number of small memory leaks identified by coverity. Fixes
10360 bug 26467; bugfix on numerous Tor versions.
10362 o Minor bugfixes (logging):
10363 - Improve the log message when connection initiators fail to
10364 authenticate direct connections to relays. Fixes bug 26927; bugfix
10367 o Minor bugfixes (portability):
10368 - Avoid a compilation error in test_bwmgt.c on Solaris 10. Fixes bug
10369 26994; bugfix on 0.3.4.1-alpha.
10370 - Work around two different bugs in the OS X 10.10 and later SDKs
10371 that would prevent us from successfully targeting earlier versions
10372 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
10374 o Minor bugfixes (single onion services, Tor2web):
10375 - Log a protocol warning when single onion services or Tor2web
10376 clients fail to authenticate direct connections to relays. Fixes
10377 bug 26924; bugfix on 0.2.9.1-alpha.
10379 o Minor bugfixes (testing):
10380 - Disable core dumps in test_bt.sh, to avoid failures in "make
10381 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
10383 o Minor bugfixes (testing, compatibility):
10384 - When running the ntor_ref.py and hs_ntor_ref.py tests, make sure
10385 only to pass strings (rather than "bytes" objects) to the Python
10386 subprocess module. Python 3 on Windows seems to require this.
10387 Fixes bug 26535; bugfix on 0.2.5.5-alpha (for ntor_ref.py) and
10388 0.3.1.1-alpha (for hs_ntor_ref.py).
10390 o Minor bugfixes (v3 onion services):
10391 - Stop sending ed25519 link specifiers in v3 onion service introduce
10392 cells and descriptors, when the rendezvous or introduction point
10393 doesn't support ed25519 link authentication. Fixes bug 26627;
10394 bugfix on 0.3.2.4-alpha.
10397 Changes in version 0.3.4.5-rc - 2018-07-13
10398 Tor 0.3.4.5-rc moves to a new bridge authority, meaning people running
10399 bridge relays should upgrade.
10401 o Directory authority changes:
10402 - The "Bifroest" bridge authority has been retired; the new bridge
10403 authority is "Serge", and it is operated by George from the
10404 TorBSD project. Closes ticket 26771.
10407 Changes in version 0.3.3.9 - 2018-07-13
10408 Tor 0.3.3.9 moves to a new bridge authority, meaning people running
10409 bridge relays should upgrade.
10411 o Directory authority changes:
10412 - The "Bifroest" bridge authority has been retired; the new bridge
10413 authority is "Serge", and it is operated by George from the
10414 TorBSD project. Closes ticket 26771.
10417 Changes in version 0.3.2.11 - 2018-07-13
10418 Tor 0.3.2.11 moves to a new bridge authority, meaning people running
10419 bridge relays should upgrade. We also take this opportunity to backport
10422 o Directory authority changes:
10423 - The "Bifroest" bridge authority has been retired; the new bridge
10424 authority is "Serge", and it is operated by George from the
10425 TorBSD project. Closes ticket 26771.
10427 o Directory authority changes (backport from 0.3.3.7):
10428 - Add an IPv6 address for the "dannenberg" directory authority.
10429 Closes ticket 26343.
10431 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
10432 - When directory authorities read a zero-byte bandwidth file, they
10433 would previously log a warning with the contents of an
10434 uninitialised buffer. They now log a warning about the empty file
10435 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10437 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
10438 - Correctly detect when onion services get disabled after HUP. Fixes
10439 bug 25761; bugfix on 0.3.2.1.
10441 o Minor features (sandbox, backport from 0.3.3.4-alpha):
10442 - Explicitly permit the poll() system call when the Linux
10443 seccomp2-based sandbox is enabled: apparently, some versions of
10444 libc use poll() when calling getpwnam(). Closes ticket 25313.
10446 o Minor feature (continuous integration, backport from 0.3.3.5-rc):
10447 - Update the Travis CI configuration to use the stable Rust channel,
10448 now that we have decided to require that. Closes ticket 25714.
10450 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
10451 - Our .travis.yml configuration now includes support for testing the
10452 results of "make distcheck". (It's not uncommon for "make check"
10453 to pass but "make distcheck" to fail.) Closes ticket 25814.
10454 - Our Travis CI configuration now integrates with the Coveralls
10455 coverage analysis tool. Closes ticket 25818.
10457 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
10458 - Add several checks to detect whether Tor relays are uploading
10459 their descriptors without specifying why they regenerated them.
10460 Diagnostic for ticket 25686.
10462 o Minor features (compilation, backport from 0.3.4.4-rc):
10463 - When building Tor, prefer to use Python 3 over Python 2, and more
10464 recent (contemplated) versions over older ones. Closes
10467 o Minor features (geoip):
10468 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10469 Country database. Closes ticket 26674.
10471 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
10472 - Upon receiving a malformed connected cell, stop processing the
10473 cell immediately. Previously we would mark the connection for
10474 close, but continue processing the cell as if the connection were
10475 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
10477 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
10478 - Allow the nanosleep() system call, which glibc uses to implement
10479 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
10481 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
10482 - When running the hs_ntor_ref.py test, make sure only to pass
10483 strings (rather than "bytes" objects) to the Python subprocess
10484 module. Python 3 on Windows seems to require this. Fixes bug
10485 26535; bugfix on 0.3.1.1-alpha.
10486 - When running the ntor_ref.py test, make sure only to pass strings
10487 (rather than "bytes" objects) to the Python subprocess module.
10488 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10491 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
10492 - Work around a change in OpenSSL 1.1.1 where return values that
10493 would previously indicate "no password" now indicate an empty
10494 password. Without this workaround, Tor instances running with
10495 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10496 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10498 o Minor bugfixes (documentation, backport from 0.3.3.5-rc):
10499 - Document that the PerConnBW{Rate,Burst} options will fall back to
10500 their corresponding consensus parameters only if those parameters
10501 are set. Previously we had claimed that these values would always
10502 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
10504 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
10505 - Fix a compilation warning on some versions of GCC when building
10506 code that calls routerinfo_get_my_routerinfo() twice, assuming
10507 that the second call will succeed if the first one did. Fixes bug
10508 26269; bugfix on 0.2.8.2-alpha.
10510 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
10511 - Don't consider Tor running as a client if the ControlPort is open,
10512 but no actual client ports are open. Fixes bug 26062; bugfix
10515 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
10516 - Prevent a possible out-of-bounds smartlist read in
10517 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10519 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
10520 - Fix a very unlikely (impossible, we believe) null pointer
10521 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
10522 Coverity; this is CID 1430932.
10524 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
10525 - Fix a memory leak when a v3 onion service is configured and gets a
10526 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
10527 - When parsing the descriptor signature, look for the token plus an
10528 extra white-space at the end. This is more correct but also will
10529 allow us to support new fields that might start with "signature".
10530 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
10532 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
10533 - Relays now correctly block attempts to re-extend to the previous
10534 relay by Ed25519 identity. Previously they would warn in this
10535 case, but not actually reject the attempt. Fixes bug 26158; bugfix
10538 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
10539 - Avoid a crash when running with DirPort set but ORPort turned off.
10540 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
10542 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
10543 - Silence unused-const-variable warnings in zstd.h with some GCC
10544 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
10546 o Minor bugfixes (testing, backport from 0.3.3.4-alpha):
10547 - Avoid intermittent test failures due to a test that had relied on
10548 onion service introduction point creation finishing within 5
10549 seconds of real clock time. Fixes bug 25450; bugfix
10552 o Minor bugfixes (compilation, backport from 0.3.3.4-alpha):
10553 - Fix a C99 compliance issue in our configuration script that caused
10554 compilation issues when compiling Tor with certain versions of
10555 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
10557 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
10558 - Fix a number of small memory leaks identified by coverity. Fixes
10559 bug 26467; bugfix on numerous Tor versions.
10561 o Code simplification and refactoring (backport from 0.3.3.5-rc):
10562 - Move the list of default directory authorities to its own file.
10563 Closes ticket 24854. Patch by "beastr0".
10566 Changes in version 0.2.9.16 - 2018-07-13
10567 Tor 0.2.9.16 moves to a new bridge authority, meaning people running
10568 bridge relays should upgrade. We also take this opportunity to backport
10571 o Directory authority changes:
10572 - The "Bifroest" bridge authority has been retired; the new bridge
10573 authority is "Serge", and it is operated by George from the
10574 TorBSD project. Closes ticket 26771.
10576 o Directory authority changes (backport from 0.3.3.7):
10577 - Add an IPv6 address for the "dannenberg" directory authority.
10578 Closes ticket 26343.
10580 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
10581 - When directory authorities read a zero-byte bandwidth file, they
10582 would previously log a warning with the contents of an
10583 uninitialised buffer. They now log a warning about the empty file
10584 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10586 o Minor features (sandbox, backport from 0.3.3.4-alpha):
10587 - Explicitly permit the poll() system call when the Linux
10588 seccomp2-based sandbox is enabled: apparently, some versions of
10589 libc use poll() when calling getpwnam(). Closes ticket 25313.
10591 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
10592 - Our .travis.yml configuration now includes support for testing the
10593 results of "make distcheck". (It's not uncommon for "make check"
10594 to pass but "make distcheck" to fail.) Closes ticket 25814.
10595 - Our Travis CI configuration now integrates with the Coveralls
10596 coverage analysis tool. Closes ticket 25818.
10598 o Minor features (compilation, backport from 0.3.4.4-rc):
10599 - When building Tor, prefer to use Python 3 over Python 2, and more
10600 recent (contemplated) versions over older ones. Closes
10603 o Minor features (geoip):
10604 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10605 Country database. Closes ticket 26674.
10607 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
10608 - Upon receiving a malformed connected cell, stop processing the
10609 cell immediately. Previously we would mark the connection for
10610 close, but continue processing the cell as if the connection were
10611 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
10613 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
10614 - Allow the nanosleep() system call, which glibc uses to implement
10615 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
10617 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
10618 - When running the ntor_ref.py test, make sure only to pass strings
10619 (rather than "bytes" objects) to the Python subprocess module.
10620 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10623 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
10624 - Work around a change in OpenSSL 1.1.1 where return values that
10625 would previously indicate "no password" now indicate an empty
10626 password. Without this workaround, Tor instances running with
10627 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10628 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10630 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
10631 - Fix a compilation warning on some versions of GCC when building
10632 code that calls routerinfo_get_my_routerinfo() twice, assuming
10633 that the second call will succeed if the first one did. Fixes bug
10634 26269; bugfix on 0.2.8.2-alpha.
10636 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
10637 - Don't consider Tor running as a client if the ControlPort is open,
10638 but no actual client ports are open. Fixes bug 26062; bugfix
10641 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
10642 - Prevent a possible out-of-bounds smartlist read in
10643 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10645 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
10646 - Fix a very unlikely (impossible, we believe) null pointer
10647 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
10648 Coverity; this is CID 1430932.
10650 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
10651 - Fix a number of small memory leaks identified by coverity. Fixes
10652 bug 26467; bugfix on numerous Tor versions.
10654 o Code simplification and refactoring (backport from 0.3.3.5-rc):
10655 - Move the list of default directory authorities to its own file.
10656 Closes ticket 24854. Patch by "beastr0".
10659 Changes in version 0.3.4.4-rc - 2018-07-09
10660 Tor 0.3.4.4-rc fixes several small compilation, portability, and
10661 correctness issues in previous versions of Tor. This version is a
10662 release candidate: if no serious bugs are found, we expect that the
10663 stable 0.3.4 release will be (almost) the same as this release.
10665 o Minor features (compilation):
10666 - When building Tor, prefer to use Python 3 over Python 2, and more
10667 recent (contemplated) versions over older ones. Closes
10670 o Minor features (geoip):
10671 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10672 Country database. Closes ticket 26674.
10674 o Minor features (Rust, portability):
10675 - Rust cross-compilation is now supported. Closes ticket 25895.
10677 o Minor bugfixes (compilation):
10678 - Fix a compilation warning on some versions of GCC when building
10679 code that calls routerinfo_get_my_routerinfo() twice, assuming
10680 that the second call will succeed if the first one did. Fixes bug
10681 26269; bugfix on 0.2.8.2-alpha.
10683 o Minor bugfixes (control port):
10684 - Report the port correctly when a port is configured to bind to
10685 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
10686 - Handle the HSADDRESS= argument to the HSPOST command properly.
10687 (Previously, this argument was misparsed and thus ignored.) Fixes
10688 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
10690 o Minor bugfixes (correctness, flow control):
10691 - Upon receiving a stream-level SENDME cell, verify that our window
10692 has not grown too large. Fixes bug 26214; bugfix on svn
10695 o Minor bugfixes (memory, correctness):
10696 - Fix a number of small memory leaks identified by coverity. Fixes
10697 bug 26467; bugfix on numerous Tor versions.
10699 o Minor bugfixes (testing, compatibility):
10700 - When running the hs_ntor_ref.py test, make sure only to pass
10701 strings (rather than "bytes" objects) to the Python subprocess
10702 module. Python 3 on Windows seems to require this. Fixes bug
10703 26535; bugfix on 0.3.1.1-alpha.
10704 - When running the ntor_ref.py test, make sure only to pass strings
10705 (rather than "bytes" objects) to the Python subprocess module.
10706 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10710 Changes in version 0.3.3.8 - 2018-07-09
10711 Tor 0.3.3.8 backports several changes from the 0.3.4.x series, including
10712 fixes for a memory leak affecting directory authorities.
10714 o Major bugfixes (directory authority, backport from 0.3.4.3-alpha):
10715 - Stop leaking memory on directory authorities when planning to
10716 vote. This bug was crashing authorities by exhausting their
10717 memory. Fixes bug 26435; bugfix on 0.3.3.6.
10719 o Major bugfixes (rust, testing, backport from 0.3.4.3-alpha):
10720 - Make sure that failing tests in Rust will actually cause the build
10721 to fail: previously, they were ignored. Fixes bug 26258; bugfix
10724 o Minor features (compilation, backport from 0.3.4.4-rc):
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 (relay, diagnostic, backport from 0.3.4.3-alpha):
10734 - Add several checks to detect whether Tor relays are uploading
10735 their descriptors without specifying why they regenerated them.
10736 Diagnostic for ticket 25686.
10738 o Minor bugfixes (circuit path selection, backport from 0.3.4.1-alpha):
10739 - Don't count path selection failures as circuit build failures.
10740 This change should eliminate cases where Tor blames its guard or
10741 the network for situations like insufficient microdescriptors
10742 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
10745 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
10746 - Fix a compilation warning on some versions of GCC when building
10747 code that calls routerinfo_get_my_routerinfo() twice, assuming
10748 that the second call will succeed if the first one did. Fixes bug
10749 26269; bugfix on 0.2.8.2-alpha.
10751 o Minor bugfixes (control port, backport from 0.3.4.4-rc):
10752 - Handle the HSADDRESS= argument to the HSPOST command properly.
10753 (Previously, this argument was misparsed and thus ignored.) Fixes
10754 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
10756 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
10757 - Fix a number of small memory leaks identified by coverity. Fixes
10758 bug 26467; bugfix on numerous Tor versions.
10760 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
10761 - Relays now correctly block attempts to re-extend to the previous
10762 relay by Ed25519 identity. Previously they would warn in this
10763 case, but not actually reject the attempt. Fixes bug 26158; bugfix
10766 o Minor bugfixes (restart-in-process, backport from 0.3.4.1-alpha):
10767 - When shutting down, Tor now clears all the flags in the control.c
10768 module. This should prevent a bug where authentication cookies are
10769 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
10771 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
10772 - When running the hs_ntor_ref.py test, make sure only to pass
10773 strings (rather than "bytes" objects) to the Python subprocess
10774 module. Python 3 on Windows seems to require this. Fixes bug
10775 26535; bugfix on 0.3.1.1-alpha.
10776 - When running the ntor_ref.py test, make sure only to pass strings
10777 (rather than "bytes" objects) to the Python subprocess module.
10778 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10782 Changes in version 0.3.4.3-alpha - 2018-06-26
10783 Tor 0.3.4.3-alpha fixes several bugs in earlier versions, including
10784 one that was causing stability issues on directory authorities.
10786 o Major bugfixes (directory authority):
10787 - Stop leaking memory on directory authorities when planning to
10788 vote. This bug was crashing authorities by exhausting their
10789 memory. Fixes bug 26435; bugfix on 0.3.3.6.
10791 o Major bugfixes (rust, testing):
10792 - Make sure that failing tests in Rust will actually cause the build
10793 to fail: previously, they were ignored. Fixes bug 26258; bugfix
10796 o Minor feature (directory authorities):
10797 - Stop warning about incomplete bw lines before the first complete
10798 bw line has been found, so that additional header lines can be
10799 ignored. Fixes bug 25960; bugfix on 0.2.2.1-alpha
10801 o Minor features (relay, diagnostic):
10802 - Add several checks to detect whether Tor relays are uploading
10803 their descriptors without specifying why they regenerated them.
10804 Diagnostic for ticket 25686.
10806 o Minor features (unit tests):
10807 - Test complete bandwidth measurements files, and test that
10808 incomplete bandwidth lines only give warnings when the end of the
10809 header has not been detected. Fixes bug 25947; bugfix
10812 o Minor bugfixes (compilation):
10813 - Refrain from compiling unit testing related object files when
10814 --disable-unittests is set to configure script. Fixes bug 24891;
10815 bugfix on 0.2.5.1-alpha.
10816 - When linking the libtor_testing.a library, only include the
10817 dirauth object files once. Previously, they were getting added
10818 twice. Fixes bug 26402; bugfix on 0.3.4.1-alpha.
10819 - The --enable-fatal-warnings flag now affects Rust code as well.
10820 Closes ticket 26245.
10822 o Minor bugfixes (onion services):
10823 - Recompute some consensus information after detecting a clock jump,
10824 or after transitioning from a non-live consensus to a live
10825 consensus. We do this to avoid having an outdated state, and
10826 miscalculating the index for next-generation onion services. Fixes
10827 bug 24977; bugfix on 0.3.2.1-alpha.
10829 o Minor bugfixes (relay):
10830 - Relays now correctly block attempts to re-extend to the previous
10831 relay by Ed25519 identity. Previously they would warn in this
10832 case, but not actually reject the attempt. Fixes bug 26158; bugfix
10835 o Minor bugfixes (testing):
10836 - Fix compilation of the doctests in the Rust crypto crate. Fixes
10837 bug 26415; bugfix on 0.3.4.1-alpha.
10838 - Instead of trying to read the geoip configuration files from
10839 within the unit tests, instead create our own ersatz files with
10840 just enough geoip data in the format we expect. Trying to read
10841 from the source directory created problems on Windows with mingw,
10842 where the build system's paths are not the same as the platform's
10843 paths. Fixes bug 25787; bugfix on 0.3.4.1-alpha.
10844 - Refrain from trying to get an item from an empty smartlist in
10845 test_bridges_clear_bridge_list. Set DEBUG_SMARTLIST in unit tests
10846 to catch improper smartlist usage. Furthermore, enable
10847 DEBUG_SMARTLIST globally when build is configured with fragile
10848 hardening. Fixes bug 26196; bugfix on 0.3.4.1-alpha.
10851 Changes in version 0.3.3.7 - 2018-06-12
10852 Tor 0.3.3.7 backports several changes from the 0.3.4.x series, including
10853 fixes for bugs affecting compatibility and stability.
10855 o Directory authority changes:
10856 - Add an IPv6 address for the "dannenberg" directory authority.
10857 Closes ticket 26343.
10859 o Minor features (geoip):
10860 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
10861 Country database. Closes ticket 26351.
10863 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
10864 - Work around a change in OpenSSL 1.1.1 where return values that
10865 would previously indicate "no password" now indicate an empty
10866 password. Without this workaround, Tor instances running with
10867 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10868 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10870 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
10871 - Silence unused-const-variable warnings in zstd.h with some GCC
10872 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
10874 o Minor bugfixes (controller, backport from 0.3.4.2-alpha):
10875 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
10876 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
10877 miscounting the total number of circuits for these field values.)
10878 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
10880 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
10881 - Prevent a possible out-of-bounds smartlist read in
10882 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10884 o Minor bugfixes (path selection, backport from 0.3.4.1-alpha):
10885 - Only select relays when they have the descriptors we prefer to use
10886 for them. This change fixes a bug where we could select a relay
10887 because it had _some_ descriptor, but reject it later with a
10888 nonfatal assertion error because it didn't have the exact one we
10889 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
10892 Changes in version 0.3.4.2-alpha - 2018-06-12
10893 Tor 0.3.4.2-alpha fixes several minor bugs in the previous alpha
10894 release, and forward-ports an authority-only security fix from 0.3.3.6.
10896 o Directory authority changes:
10897 - Add an IPv6 address for the "dannenberg" directory authority.
10898 Closes ticket 26343.
10900 o Major bugfixes (security, directory authority, denial-of-service, also in 0.3.3.6):
10901 - Fix a bug that could have allowed an attacker to force a directory
10902 authority to use up all its RAM by passing it a maliciously
10903 crafted protocol versions string. Fixes bug 25517; bugfix on
10904 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
10906 o Minor features (continuous integration):
10907 - Add the necessary configuration files for continuous integration
10908 testing on Windows, via the Appveyor platform. Closes ticket
10909 25549. Patches from Marcin Cieślak and Isis Lovecruft.
10911 o Minor features (geoip):
10912 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
10913 Country database. Closes ticket 26351.
10915 o Minor bugfixes (compatibility, openssl):
10916 - Work around a change in OpenSSL 1.1.1 where return values that
10917 would previously indicate "no password" now indicate an empty
10918 password. Without this workaround, Tor instances running with
10919 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10920 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10922 o Minor bugfixes (compilation):
10923 - Silence unused-const-variable warnings in zstd.h with some GCC
10924 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
10925 - Fix compilation when using OpenSSL 1.1.0 with the "no-deprecated"
10926 flag enabled. Fixes bug 26156; bugfix on 0.3.4.1-alpha.
10927 - Avoid a compiler warning when casting the return value of
10928 smartlist_len() to double with DEBUG_SMARTLIST enabled. Fixes bug
10929 26283; bugfix on 0.2.4.10-alpha.
10931 o Minor bugfixes (control port):
10932 - Do not count 0-length RELAY_COMMAND_DATA cells as valid data in
10933 CIRC_BW events. Previously, such cells were counted entirely in
10934 the OVERHEAD field. Now they are not. Fixes bug 26259; bugfix
10937 o Minor bugfixes (controller):
10938 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
10939 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
10940 miscounting the total number of circuits for these field values.)
10941 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
10943 o Minor bugfixes (hardening):
10944 - Prevent a possible out-of-bounds smartlist read in
10945 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10947 o Minor bugfixes (onion services):
10948 - Fix a bug that blocked the creation of ephemeral v3 onion
10949 services. Fixes bug 25939; bugfix on 0.3.4.1-alpha.
10951 o Minor bugfixes (test coverage tools):
10952 - Update our "cov-diff" script to handle output from the latest
10953 version of gcov, and to remove extraneous timestamp information
10954 from its output. Fixes bugs 26101 and 26102; bugfix
10958 Changes in version 0.3.3.6 - 2018-05-22
10959 Tor 0.3.3.6 is the first stable release in the 0.3.3 series. It
10960 backports several important fixes from the 0.3.4.1-alpha.
10962 The Tor 0.3.3 series includes controller support and other
10963 improvements for v3 onion services, official support for embedding Tor
10964 within other applications, and our first non-trivial module written in
10965 the Rust programming language. (Rust is still not enabled by default
10966 when building Tor.) And as usual, there are numerous other smaller
10967 bugfixes, features, and improvements.
10969 Below are the changes since 0.3.3.5-rc. For a list of all changes
10970 since 0.3.2.10, see the ReleaseNotes file.
10972 o Major bugfixes (directory authorities, security, backport from 0.3.4.1-alpha):
10973 - When directory authorities read a zero-byte bandwidth file, they
10974 would previously log a warning with the contents of an
10975 uninitialised buffer. They now log a warning about the empty file
10976 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10978 o Major bugfixes (security, directory authority, denial-of-service):
10979 - Fix a bug that could have allowed an attacker to force a directory
10980 authority to use up all its RAM by passing it a maliciously
10981 crafted protocol versions string. Fixes bug 25517; bugfix on
10982 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
10984 o Major bugfixes (crash, backport from 0.3.4.1-alpha):
10985 - Avoid a rare assertion failure in the circuit build timeout code
10986 if we fail to allow any circuits to actually complete. Fixes bug
10987 25733; bugfix on 0.2.2.2-alpha.
10989 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
10990 - Avoid a crash when testing router reachability on a router that
10991 could have an ed25519 ID, but which does not. Fixes bug 25415;
10992 bugfix on 0.3.3.2-alpha.
10994 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
10995 - Correctly detect when onion services get disabled after HUP. Fixes
10996 bug 25761; bugfix on 0.3.2.1.
10998 o Major bugfixes (relay, denial of service, backport from 0.3.4.1-alpha):
10999 - Impose a limit on circuit cell queue size. The limit can be
11000 controlled by a consensus parameter. Fixes bug 25226; bugfix
11003 o Minor features (compatibility, backport from 0.3.4.1-alpha):
11004 - Avoid some compilation warnings with recent versions of LibreSSL.
11005 Closes ticket 26006.
11007 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
11008 - Our .travis.yml configuration now includes support for testing the
11009 results of "make distcheck". (It's not uncommon for "make check"
11010 to pass but "make distcheck" to fail.) Closes ticket 25814.
11011 - Our Travis CI configuration now integrates with the Coveralls
11012 coverage analysis tool. Closes ticket 25818.
11014 o Minor features (geoip):
11015 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
11016 database. Closes ticket 26104.
11018 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
11019 - Don't consider Tor running as a client if the ControlPort is open,
11020 but no actual client ports are open. Fixes bug 26062; bugfix
11023 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
11024 - Upon receiving a malformed connected cell, stop processing the
11025 cell immediately. Previously we would mark the connection for
11026 close, but continue processing the cell as if the connection were
11027 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
11029 o Minor bugfixes (documentation, backport from 0.3.4.1-alpha):
11030 - Stop saying in the manual that clients cache ipv4 dns answers from
11031 exit relays. We haven't used them since 0.2.6.3-alpha, and in
11032 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
11033 we forgot to say so in the man page. Fixes bug 26052; bugfix
11036 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
11037 - Allow the nanosleep() system call, which glibc uses to implement
11038 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
11040 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
11041 - Fix a memory leak when a v3 onion service is configured and gets a
11042 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
11043 - When parsing the descriptor signature, look for the token plus an
11044 extra white-space at the end. This is more correct but also will
11045 allow us to support new fields that might start with "signature".
11046 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
11048 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
11049 - Avoid a crash when running with DirPort set but ORPort turned off.
11050 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
11052 o Documentation (backport from 0.3.4.1-alpha):
11053 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
11054 ticket 25857. Patch from "CTassisF".
11057 Changes in version 0.3.4.1-alpha - 2018-05-17
11058 Tor 0.3.4.1-alpha is the first release in the 0.3.4.x series. It
11059 includes refactoring to begin reducing Tor's binary size and idle CPU
11060 usage on mobile, along with prep work for new bandwidth scanners,
11061 improvements to the experimental "vanguards" feature, and numerous
11062 other small features and bugfixes.
11064 o New system requirements:
11065 - Tor no longer tries to support old operating systems without
11066 mmap() or some local equivalent. Apparently, compilation on such
11067 systems has been broken for some time, without anybody noticing or
11068 complaining. Closes ticket 25398.
11070 o Major feature (directory authority, modularization):
11071 - The directory authority subsystem has been modularized. The code
11072 is now located in src/or/dirauth/, and is compiled in by default.
11073 To disable the module, the configure option
11074 --disable-module-dirauth has been added. This module may be
11075 disabled by default in some future release. Closes ticket 25610.
11077 o Major features (main loop, CPU usage):
11078 - When Tor is disabled (via DisableNetwork or via hibernation), it
11079 no longer needs to run any per-second events. This change should
11080 make it easier for mobile applications to disable Tor while the
11081 device is sleeping, or Tor is not running. Closes ticket 26063.
11082 - Tor no longer enables all of its periodic events by default.
11083 Previously, Tor would enable all possible main loop events,
11084 regardless of whether it needed them. Furthermore, many of these
11085 events are now disabled with Tor is hibernating or DisableNetwork
11086 is set. This is a big step towards reducing client CPU usage by
11087 reducing the amount of wake-ups the daemon does. Closes ticket
11089 - The bandwidth-limitation logic has been refactored so that
11090 bandwidth calculations are performed on-demand, rather than every
11091 TokenBucketRefillInterval milliseconds. This change should improve
11092 the granularity of our bandwidth calculations, and limit the
11093 number of times that the Tor process needs to wake up when it is
11094 idle. Closes ticket 25373.
11095 - Move responsibility for many operations from a once-per-second
11096 callback to a callback that is only scheduled as needed. Moving
11097 this functionality has allowed us to disable the callback when
11098 Tor's network is disabled. Once enough items are removed from our
11099 once-per-second callback, we can eliminate it entirely to conserve
11100 CPU when idle. The functionality removed includes: closing
11101 connections, circuits, and channels (ticket 25932); consensus
11102 voting (25937); flushing log callbacks (25951); honoring delayed
11103 SIGNEWNYM requests (25949); rescanning the consensus cache
11104 (25931); saving the state file to disk (25948); warning relay
11105 operators about unreachable ports (25952); and keeping track of
11106 Tor's uptime (26009).
11108 o Major bugfixes (directory authorities, security):
11109 - When directory authorities read a zero-byte bandwidth file, they
11110 would previously log a warning with the contents of an
11111 uninitialised buffer. They now log a warning about the empty file
11112 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
11114 o Major bugfixes (crash):
11115 - Avoid a rare assertion failure in the circuit build timeout code
11116 if we fail to allow any circuits to actually complete. Fixes bug
11117 25733; bugfix on 0.2.2.2-alpha.
11119 o Major bugfixes (directory authority):
11120 - Avoid a crash when testing router reachability on a router that
11121 could have an ed25519 ID, but which does not. Fixes bug 25415;
11122 bugfix on 0.3.3.2-alpha.
11124 o Major bugfixes (onion service):
11125 - Correctly detect when onion services get disabled after HUP. Fixes
11126 bug 25761; bugfix on 0.3.2.1.
11128 o Major bugfixes (protover, voting):
11129 - Revise Rust implementation of protover to use a more memory-
11130 efficient voting algorithm and corresponding data structures, thus
11131 avoiding a potential (but small impact) DoS attack where specially
11132 crafted protocol strings would expand to several potential
11133 megabytes in memory. In the process, several portions of code were
11134 revised to be methods on new, custom types, rather than functions
11135 taking interchangeable types, thus increasing type safety of the
11136 module. Custom error types and handling were added as well, in
11137 order to facilitate better error dismissal/handling in outside
11138 crates and avoid mistakenly passing an internal error string to C
11139 over the FFI boundary. Many tests were added, and some previous
11140 differences between the C and Rust implementations have been
11141 remedied. Fixes bug 24031; bugfix on 0.3.3.1-alpha.
11143 o Major bugfixes (relay, denial of service):
11144 - Impose a limit on circuit cell queue size. The limit can be
11145 controlled by a consensus parameter. Fixes bug 25226; bugfix
11148 o Minor features (accounting):
11149 - When Tor becomes dormant, it now uses a scheduled event to wake up
11150 at the right time. Previously, we would use the per-second timer
11151 to check whether to wake up, but we no longer have any per-second
11152 timers enabled when the network is disabled. Closes ticket 26064.
11154 o Minor features (code quality):
11155 - Add optional spell-checking for the Tor codebase, using the
11156 "misspell" program. To use this feature, run "make check-typos".
11157 Closes ticket 25024.
11159 o Minor features (compatibility):
11160 - Tor now detects versions of OpenSSL 1.1.0 and later compiled with
11161 the no-deprecated option, and builds correctly with them. Closes
11162 tickets 19429, 19981, and 25353.
11163 - Avoid some compilation warnings with recent versions of LibreSSL.
11164 Closes ticket 26006.
11166 o Minor features (compression, zstd):
11167 - When running with zstd, Tor now considers using advanced functions
11168 that the zstd maintainers have labeled as potentially unstable. To
11169 prevent breakage, Tor will only use this functionality when the
11170 runtime version of the zstd library matches the version with which
11171 Tor was compiled. Closes ticket 25162.
11173 o Minor features (configuration):
11174 - The "DownloadSchedule" options have been renamed to end with
11175 "DownloadInitialDelay". The old names are still allowed, but will
11176 produce a warning. Comma-separated lists are still permitted for
11177 these options, but all values after the first are ignored (as they
11178 have been since 0.2.9). Closes ticket 23354.
11180 o Minor features (continuous integration):
11181 - Our .travis.yml configuration now includes support for testing the
11182 results of "make distcheck". (It's not uncommon for "make check"
11183 to pass but "make distcheck" to fail.) Closes ticket 25814.
11184 - Our Travis CI configuration now integrates with the Coveralls
11185 coverage analysis tool. Closes ticket 25818.
11187 o Minor features (control port):
11188 - Introduce GETINFO "current-time/{local,utc}" to return the local
11189 and UTC times respectively in ISO format. This helps a controller
11190 like Tor Browser detect a time-related error. Closes ticket 25511.
11191 Patch by Neel Chauhan.
11192 - Introduce new fields to the CIRC_BW event. There are two new
11193 fields in each of the read and written directions. The DELIVERED
11194 fields report the total valid data on the circuit, as measured by
11195 the payload sizes of verified and error-checked relay command
11196 cells. The OVERHEAD fields report the total unused bytes in each
11197 of these cells. Closes ticket 25903.
11199 o Minor features (directory authority):
11200 - Directory authorities now open their key-pinning files as O_SYNC,
11201 to limit their chances of accidentally writing partial lines.
11202 Closes ticket 23909.
11204 o Minor features (directory authority, forward compatibility):
11205 - Make the lines of the measured bandwidth file able to contain
11206 their entries in any order. Previously, the node_id entry needed
11207 to come first. Closes ticket 26004.
11209 o Minor features (entry guards):
11210 - Introduce a new torrc option NumPrimaryGuards for controlling the
11211 number of primary guards. Closes ticket 25843.
11213 o Minor features (geoip):
11214 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
11215 database. Closes ticket 26104.
11217 o Minor features (performance):
11218 - Avoid a needless call to malloc() when processing an incoming
11219 relay cell. Closes ticket 24914.
11220 - Make our timing-wheel code run a tiny bit faster on 32-bit
11221 platforms, by preferring 32-bit math to 64-bit. Closes
11223 - Avoid a needless malloc()/free() pair every time we handle an ntor
11224 handshake. Closes ticket 25150.
11226 o Minor features (testing):
11227 - Add a unit test for voting_schedule_get_start_of_next_interval().
11228 Closes ticket 26014, and helps make unit test coverage
11229 more deterministic.
11230 - A new unittests module specifically for testing the functions in
11231 the (new-ish) bridges.c module has been created with new
11232 unittests, raising the code coverage percentages. Closes 25425.
11233 - We now have improved testing for addressmap_get_virtual_address()
11234 function. This should improve our test coverage, and make our test
11235 coverage more deterministic. Closes ticket 25993.
11237 o Minor features (timekeeping, circuit scheduling):
11238 - When keeping track of how busy each circuit have been recently on
11239 a given connection, use coarse-grained monotonic timers rather
11240 than gettimeofday(). This change should marginally increase
11241 accuracy and performance. Implements part of ticket 25927.
11243 o Minor bugfixes (bandwidth management):
11244 - Consider ourselves "low on write bandwidth" if we have exhausted
11245 our write bandwidth some time in the last second. This was the
11246 documented behavior before, but the actual behavior was to change
11247 this value every TokenBucketRefillInterval. Fixes bug 25828;
11248 bugfix on 0.2.3.5-alpha.
11250 o Minor bugfixes (C correctness):
11251 - Add a missing lock acquisition in the shutdown code of the control
11252 subsystem. Fixes bug 25675; bugfix on 0.2.7.3-rc. Found by
11253 Coverity; this is CID 1433643.
11255 o Minor bugfixes (circuit path selection):
11256 - Don't count path selection failures as circuit build failures.
11257 This change should eliminate cases where Tor blames its guard or
11258 the network for situations like insufficient microdescriptors
11259 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
11262 o Minor bugfixes (client):
11263 - Don't consider Tor running as a client if the ControlPort is open,
11264 but no actual client ports are open. Fixes bug 26062; bugfix
11267 o Minor bugfixes (code style):
11268 - Fixed multiple includes of transports.h in src/or/connection.c
11269 Fixes bug 25261; bugfix on 0.2.5.1-alpha.
11270 - Remove the unused variable n_possible from the function
11271 channel_get_for_extend(). Fixes bug 25645; bugfix on 0.2.4.4-alpha
11273 o Minor bugfixes (control interface):
11274 - Respond with more human-readable error messages to GETINFO exit-
11275 policy/* requests. Also, let controller know if an error is
11276 transient (response code 551) or not (response code 552). Fixes
11277 bug 25852; bugfix on 0.2.8.1-alpha.
11279 o Minor bugfixes (controller):
11280 - Make CIRC_BW event reflect the total of all data sent on a
11281 circuit, including padding and dropped cells. Also fix a mis-
11282 counting bug when STREAM_BW events were enabled. Fixes bug 25400;
11283 bugfix on 0.2.5.2-alpha.
11285 o Minor bugfixes (correctness, client):
11286 - Upon receiving a malformed connected cell, stop processing the cell
11287 immediately. Previously we would mark the connection for close, but
11288 continue processing the cell as if the connection were open. Fixes bug
11289 26072; bugfix on 0.2.4.7-alpha.
11291 o Minor bugfixes (directory client):
11292 - When unverified-consensus is verified, rename it to cached-
11293 consenus. Fixes bug 4187; bugfix on 0.2.0.3-alpha.
11294 - Fixed launching a certificate fetch always during the scheduled
11295 periodic consensus fetch by fetching only in those cases when
11296 consensus are waiting for certs. Fixes bug 24740; bugfix
11299 o Minor bugfixes (documentation):
11300 - Stop saying in the manual that clients cache ipv4 dns answers from
11301 exit relays. We haven't used them since 0.2.6.3-alpha, and in
11302 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
11303 we forgot to say so in the man page. Fixes bug 26052; bugfix
11306 o Minor bugfixes (error reporting):
11307 - Improve tolerance for directory authorities with skewed clocks.
11308 Previously, an authority with a clock more than 60 seconds ahead
11309 could cause a client with a correct clock to warn that the
11310 client's clock was behind. Now the clocks of a majority of
11311 directory authorities have to be ahead of the client before this
11312 warning will occur. Fixes bug 25756; bugfix on 0.2.2.25-alpha.
11314 o Minor bugfixes (Linux seccomp2 sandbox):
11315 - Allow the nanosleep() system call, which glibc uses to implement
11316 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
11318 o Minor bugfixes (onion service):
11319 - Fix a memory leak when a v3 onion service is configured and gets a
11320 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
11321 - When parsing the descriptor signature, look for the token plus an
11322 extra white-space at the end. This is more correct but also will
11323 allow us to support new fields that might start with "signature".
11324 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
11326 o Minor bugfixes (path selection):
11327 - Only select relays when they have the descriptors we prefer to use
11328 for them. This change fixes a bug where we could select a relay
11329 because it had _some_ descriptor, but reject it later with a
11330 nonfatal assertion error because it didn't have the exact one we
11331 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
11333 o Minor bugfixes (portability):
11334 - Do not align mmap length, as it is not required by POSIX, and the
11335 getpagesize function is deprecated. Fixes bug 25399; bugfix
11338 o Minor bugfixes (portability, FreeBSD):
11339 - In have_enough_mem_for_dircache(), the variable DIRCACHE_MIN_MEM_MB
11340 does not stringify on FreeBSD, so we switch to tor_asprintf().
11341 Fixes bug 20887; bugfix on 0.2.8.1-alpha. Patch by Neel Chauhan.
11343 o Minor bugfixes (relay statistics):
11344 - When a relay is collecting internal statistics about how many
11345 create cell requests it has seen of each type, accurately count
11346 the requests from relays that temporarily fall out of the
11347 consensus. (To be extra conservative, we were already ignoring
11348 requests from clients in our counts, and we continue ignoring them
11349 here.) Fixes bug 24910; bugfix on 0.2.4.17-rc.
11351 o Minor bugfixes (relay, crash):
11352 - Avoid a crash when running with DirPort set but ORPort turned off.
11353 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
11355 o Minor bugfixes (restart-in-process):
11356 - When shutting down, Tor now clears all the flags in the control.c
11357 module. This should prevent a bug where authentication cookies are
11358 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
11360 o Minor bugfixes (testing):
11361 - When testing workqueue event-cancellation, make sure that we
11362 actually cancel an event, and that cancel each event with equal
11363 probability. (It was previously possible, though extremely
11364 unlikely, for our event-canceling test not to cancel any events.)
11365 Fixes bug 26008; bugfix on 0.2.6.3-alpha.
11366 - Repeat part of the test in test_client_pick_intro() a number of
11367 times, to give it consistent coverage. Fixes bug 25996; bugfix
11369 - Remove randomness from the hs_common/responsible_hsdirs test, so
11370 that it always takes the same path through the function it tests.
11371 Fixes bug 25997; bugfix on 0.3.2.1-alpha.
11372 - Change the behavior of the "channel/outbound" test so that it
11373 never causes a 10-second rollover for the EWMA circuitmux code.
11374 Previously, this behavior would happen randomly, and result in
11375 fluctuating test coverage. Fixes bug 25994; bugfix
11377 - Use X509_new() to allocate certificates that will be freed later
11378 with X509_free(). Previously, some parts of the unit tests had
11379 used tor_malloc_zero(), which is incorrect, and which caused test
11380 failures on Windows when they were built with extra hardening.
11381 Fixes bugs 25943 and 25944; bugfix on 0.2.8.1-alpha. Patch by
11383 - While running the circuit_timeout test, fix the PRNG to a
11384 deterministic AES stream, so that the test coverage from this test
11385 will itself be deterministic. Fixes bug 25995; bugfix
11388 o Minor bugfixes (vanguards):
11389 - Allow the last hop in a vanguard circuit to be the same as our
11390 first, to prevent the adversary from influencing guard node choice
11391 by choice of last hop. Also prevent the creation of A - B - A
11392 paths, or A - A paths, which are forbidden by relays. Fixes bug
11393 25870; bugfix on 0.3.3.1-alpha.
11395 o Code simplification and refactoring:
11396 - Remove duplicate code in parse_{c,s}method_line and bootstrap
11397 their functionalities into a single function. Fixes bug 6236;
11398 bugfix on 0.2.3.6-alpha.
11399 - We remove the PortForwarding and PortForwardingHelper options,
11400 related functions, and the port_forwarding tests. These options
11401 were used by the now-deprecated Vidalia to help ordinary users
11402 become Tor relays or bridges. Closes ticket 25409. Patch by
11404 - In order to make the OR and dir checking function in router.c less
11405 confusing we renamed some functions and
11406 consider_testing_reachability() has been split into
11407 router_should_check_reachability() and
11408 router_do_reachability_checks(). Also we improved the documentation
11409 in some functions. Closes ticket 18918.
11410 - Initial work to isolate Libevent usage to a handful of modules in
11411 our codebase, to simplify our call structure, and so that we can
11412 more easily change event loops in the future if needed. Closes
11414 - Introduce a function to call getsockname() and return tor_addr_t,
11415 to save a little complexity throughout the codebase. Closes
11417 - Make hsdir_index in node_t a hsdir_index_t rather than a pointer
11418 as hsdir_index is always present. Also, we move hsdir_index_t into
11419 or.h. Closes ticket 23094. Patch by Neel Chauhan.
11420 - Merge functions used for describing nodes and suppress the
11421 functions that do not allocate memory for the output buffer
11422 string. NODE_DESC_BUF_LEN constant and format_node_description()
11423 function cannot be used externally from router.c module anymore.
11424 Closes ticket 25432. Patch by valentecaio.
11425 - Our main loop has been simplified so that all important operations
11426 happen inside events. Previously, some operations had to happen
11427 outside the event loop, to prevent infinite sequences of event
11428 activations. Closes ticket 25374.
11429 - Put a SHA1 public key digest in hs_service_intro_point_t, and use
11430 it in register_intro_circ() and service_intro_point_new(). This
11431 prevents the digest from being re-calculated each time. Closes
11432 ticket 23107. Patch by Neel Chauhan.
11433 - Refactor token-bucket implementations to use a common backend.
11434 Closes ticket 25766.
11435 - Remove extern declaration of stats_n_seconds_working variable from
11436 main, protecting its accesses with get_uptime() and reset_uptime()
11437 functions. Closes ticket 25081, patch by “valentecaio”.
11438 - Remove our previous logic for "cached gettimeofday()" -- our
11439 coarse monotonic timers are fast enough for this purpose, and far
11440 less error-prone. Implements part of ticket 25927.
11441 - Remove the return value for fascist_firewall_choose_address_base(),
11442 and sister functions such as fascist_firewall_choose_address_node()
11443 and fascist_firewall_choose_address_rs(). Also, while we're here,
11444 initialize the ap argument as leaving it uninitialized can pose a
11445 security hazard. Closes ticket 24734. Patch by Neel Chauhan.
11446 - Rename two fields of connection_t struct. timestamp_lastwritten is
11447 renamed to timestamp_last_write_allowed and timestamp_lastread is
11448 renamed to timestamp_last_read_allowed. Closes ticket 24714, patch
11450 - Since Tor requires C99, remove our old workaround code for libc
11451 implementations where free(NULL) doesn't work. Closes ticket 24484.
11452 - Use our standard rate-limiting code to deal with excessive
11453 libevent failures, rather than the hand-rolled logic we had
11454 before. Closes ticket 26016.
11455 - We remove the return value of node_get_prim_orport() and
11456 node_get_prim_dirport(), and introduce node_get_prim_orport() in
11457 node_ipv6_or_preferred() and node_ipv6_dir_preferred() in order to
11458 check for a null address. Closes ticket 23873. Patch by
11460 - We switch to should_record_bridge_info() in
11461 geoip_note_client_seen() and options_need_geoip_info() instead of
11462 accessing the configuration values directly. Fixes bug 25290;
11463 bugfix on 0.2.1.6-alpha. Patch by Neel Chauhan.
11465 o Deprecated features:
11466 - As we are not recommending 0.2.5 anymore, we require relays that
11467 once had an ed25519 key associated with their RSA key to always
11468 have that key, instead of allowing them to drop back to a version
11469 that didn't support ed25519. This means they need to use a new RSA
11470 key if they want to downgrade to an older version of tor without
11471 ed25519. Closes ticket 20522.
11474 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
11475 ticket 25857. Patch from "CTassisF".
11477 o Removed features:
11478 - Directory authorities will no longer support voting according to
11479 any consensus method before consensus method 25. This keeps
11480 authorities compatible with all authorities running 0.2.9.8 and
11481 later, and does not break any clients or relays. Implements ticket
11482 24378 and proposal 290.
11483 - The PortForwarding and PortForwardingHelper features have been
11484 removed. The reasoning is, given that implementations of NAT
11485 traversal protocols within common consumer grade routers are
11486 frequently buggy, and that the target audience for a NAT punching
11487 feature is a perhaps less-technically-inclined relay operator,
11488 when the helper fails to setup traversal the problems are usually
11489 deep, ugly, and very router specific, making them horrendously
11490 impossible for technical support to reliable assist with, and thus
11491 resulting in frustration all around. Unfortunately, relay
11492 operators who would like to run relays behind NATs will need to
11493 become more familiar with the port forwarding configurations on
11494 their local router. Closes 25409.
11495 - The TestingEnableTbEmptyEvent option has been removed. It was used
11496 in testing simulations to measure how often connection buckets
11497 were emptied, in order to improve our scheduling, but it has not
11498 been actively used in years. Closes ticket 25760.
11499 - The old "round-robin" circuit multiplexer (circuitmux)
11500 implementation has been removed, along with a fairly large set of
11501 code that existed to support it. It has not been the default
11502 circuitmux since we introduced the "EWMA" circuitmux in 0.2.4.x,
11503 but it still required an unreasonable amount of memory and CPU.
11504 Closes ticket 25268.
11507 Changes in version 0.3.3.5-rc - 2018-04-15
11508 Tor 0.3.3.5-rc fixes various bugs in earlier versions of Tor,
11509 including some that could affect reliability or correctness.
11511 This is the first release candidate in the 0.3.3 series. If we find no
11512 new bugs or regression here, then the first stable 0.3.3 release will
11513 be nearly identical to this one.
11515 o Major bugfixes (security, protover, voting):
11516 - Revise Rust implementation of protover to use a more memory-
11517 efficient voting algorithm and corresponding data structures, thus
11518 avoiding a potential memory-based DoS attack where specially
11519 crafted protocol strings would expand to fill available memory.
11520 Fixes bug 24031; bugfix on 0.3.3.1-alpha.
11522 o Major bugfixes (performance, load balancing):
11523 - Directory authorities no longer vote in favor of the Guard flag
11524 for relays without directory support. Starting in Tor
11525 0.3.0.1-alpha, clients have been avoiding using such relays in the
11526 Guard position, leading to increasingly broken load balancing for
11527 the 5%-or-so of Guards that don't advertise directory support.
11528 Fixes bug 22310; bugfix on 0.3.0.6.
11530 o Minor feature (continuous integration):
11531 - Update the Travis CI configuration to use the stable Rust channel,
11532 now that we have decided to require that. Closes ticket 25714.
11534 o Minor features (config options):
11535 - Change the way the default value for MaxMemInQueues is calculated.
11536 We now use 40% of the hardware RAM if the system has 8 GB RAM or
11537 more. Otherwise we use the former value of 75%. Closes
11540 o Minor features (geoip):
11541 - Update geoip and geoip6 to the April 3 2018 Maxmind GeoLite2
11542 Country database. Closes ticket 25718.
11544 o Minor bugfixes (client):
11545 - When using a listed relay as a bridge, and also using
11546 microdescriptors, and considering that relay as a non-bridge in a
11547 circuit, treat its microdescriptor as a valid source of
11548 information about that relay. This change should prevent a non-
11549 fatal assertion error. Fixes bug 25691; bugfix on 0.3.3.4-alpha.
11551 o Minor bugfixes (controller):
11552 - Restore the correct operation of the RESOLVE command, which had
11553 been broken since we added the ability to enable/disable DNS on
11554 specific listener ports. Fixes bug 25617; bugfix on 0.2.9.3-alpha.
11556 o Minor bugfixes (distribution, compilation, rust):
11557 - Build correctly when the rust dependencies submodule is loaded,
11558 but the TOR_RUST_DEPENDENCIES environment variable is not set.
11559 Fixes bug 25679; bugfix on 0.3.3.1-alpha.
11560 - Actually include all of our Rust source in our source
11561 distributions. (Previously, a few of the files were accidentally
11562 omitted.) Fixes bug 25732; bugfix on 0.3.3.2-alpha.
11564 o Minor bugfixes (documentation):
11565 - Document that the PerConnBW{Rate,Burst} options will fall back to
11566 their corresponding consensus parameters only if those parameters
11567 are set. Previously we had claimed that these values would always
11568 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
11569 - Revert a misformatting issue in the ExitPolicy documentation.
11570 Fixes bug 25582; bugfix on 0.3.3.1-alpha.
11572 o Minor bugfixes (exit relay DNS retries):
11573 - Re-attempt timed-out DNS queries 3 times before failure, since our
11574 timeout is 5 seconds for them, but clients wait 10-15. Also allow
11575 slightly more timeouts per resolver when an exit has multiple
11576 resolvers configured. Fixes bug 21394; bugfix on 0.3.1.9.
11578 o Minor bugfixes (onion services):
11579 - Re-instate counting the client HSDir fetch circuits against the
11580 MaxClientCircuitsPending rate limit. Fixes bug 24989; bugfix
11582 - Remove underscores from the _HSLayer{2,3}Nodes options. This
11583 expert-user configuration can now be enabled as HSLayer{2,3}Nodes.
11584 Fixes bug 25581; bugfix on 0.3.3.1-alpha
11586 o Code simplification and refactoring:
11587 - Move the list of default directory authorities to its own file.
11588 Closes ticket 24854. Patch by "beastr0".
11590 o Documentation (manpage, denial of service):
11591 - Provide more detail about the denial-of-service options, by
11592 listing each mitigation and explaining how they relate. Closes
11596 Changes in version 0.3.3.4-alpha - 2018-03-29
11597 Tor 0.3.3.4-alpha includes various bugfixes for issues found during
11598 the alpha testing of earlier releases in its series. We are
11599 approaching a stable 0.3.3.4-alpha release: more testing is welcome!
11601 o New system requirements:
11602 - When built with Rust, Tor now depends on version 0.2.39 of the
11603 libc crate. Closes tickets 25310 and 25664.
11605 o Major bugfixes (relay, connection):
11606 - If we have failed to connect to a relay and received a connection
11607 refused, timeout, or similar error (at the TCP level), do not try
11608 that same address/port again for 60 seconds after the failure has
11609 occurred. Fixes bug 24767; bugfix on 0.0.6.
11611 o Minor features (geoip):
11612 - Update geoip and geoip6 to the March 8 2018 Maxmind GeoLite2
11613 Country database. Closes ticket 25469.
11615 o Minor features (log messages):
11616 - Improve log message in the out-of-memory handler to include
11617 information about memory usage from the different compression
11618 backends. Closes ticket 25372.
11620 o Minor features (sandbox):
11621 - Explicitly permit the poll() system call when the Linux
11622 seccomp2-based sandbox is enabled: apparently, some versions of
11623 libc use poll() when calling getpwnam(). Closes ticket 25313.
11625 o Minor bugfixes (C correctness):
11626 - Fix a very unlikely (impossible, we believe) null pointer
11627 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
11628 Coverity; this is CID 1430932.
11630 o Minor bugfixes (channel, client):
11631 - Better identify client connection when reporting to the geoip
11632 client cache. Fixes bug 24904; bugfix on 0.3.1.7.
11634 o Minor bugfixes (compilation):
11635 - Fix a C99 compliance issue in our configuration script that caused
11636 compilation issues when compiling Tor with certain versions of
11637 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
11639 o Minor bugfixes (controller, reliability):
11640 - Avoid a (nonfatal) assertion failure when extending a one-hop
11641 circuit from the controller to become a multihop circuit. Fixes
11642 bug 24903; bugfix on 0.2.5.2-alpha.
11644 o Major bugfixes (networking):
11645 - Tor will no longer reject IPv6 address strings from Tor Browser
11646 when they are passed as hostnames in SOCKS5 requests. Fixes bug
11647 25036, bugfix on Tor 0.3.1.2.
11649 o Minor bugfixes (networking):
11650 - string_is_valid_hostname() will not consider IP strings to be
11651 valid hostnames. Fixes bug 25055; bugfix on Tor 0.2.5.5.
11653 o Minor bugfixes (onion service v3):
11654 - Avoid an assertion failure when the next onion service
11655 descriptor rotation type is out of sync with the consensus's
11656 valid-after time. Instead, log a warning message with extra
11657 information, so we can better hunt down the cause of this
11658 assertion. Fixes bug 25306; bugfix on 0.3.2.1-alpha.
11660 o Minor bugfixes (testing):
11661 - Avoid intermittent test failures due to a test that had relied on
11662 onion service introduction point creation finishing within 5
11663 seconds of real clock time. Fixes bug 25450; bugfix
11665 - Rust crates are now automatically detected and tested. Previously,
11666 some crates were not tested by `make test-rust` due to a static
11667 string in the `src/test/test_rust.sh` script specifying which
11668 crates to test. Fixes bug 25560; bugfix on 0.3.3.3-alpha.
11670 o Minor bugfixes (testing, benchmarks):
11671 - Fix a crash when running benchmark tests on win32 systems. The
11672 crash was due to a mutex that wasn't initialized before logging
11673 and options were initialized. Fixes bug 25479; bugfix
11676 o Minor bugfixes (warnings, ipv6):
11677 - Avoid a bug warning that could occur when trying to connect to a
11678 relay over IPv6. This warning would occur on a Tor instance that
11679 downloads router descriptors, but prefers to use microdescriptors.
11680 Fixes bug 25213; bugfix on 0.3.3.1-alpha.
11682 o Code simplification and refactoring:
11683 - Remove the old (deterministic) directory retry logic entirely:
11684 We've used exponential backoff exclusively for some time. Closes
11688 - Improved the documentation of AccountingStart parameter. Closes
11690 - Update the documentation for "Log" to include the current list of
11691 logging domains. Closes ticket 25378.
11694 Changes in version 0.3.1.10 - 2018-03-03
11695 Tor 0.3.1.10 backports a number of bugfixes, including important fixes for
11698 It includes an important security fix for a remote crash attack
11699 against directory authorities, tracked as TROVE-2018-001.
11701 This release also backports our new system for improved resistance to
11702 denial-of-service attacks against relays.
11704 This release also fixes several minor bugs and annoyances from
11707 All directory authorities should upgrade to one of the versions
11708 released today. Relays running 0.3.1.x may wish to update to one of
11709 the versions released today, for the DoS mitigations.
11711 Please note: according to our release calendar, Tor 0.3.1 will no
11712 longer be supported after 1 July 2018. If you will be running Tor
11713 after that date, you should make sure to plan to upgrade to the latest
11714 stable version, or downgrade to 0.2.9 (which will receive long-term
11717 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
11718 - Fix a protocol-list handling bug that could be used to remotely crash
11719 directory authorities with a null-pointer exception. Fixes bug 25074;
11720 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
11723 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
11724 - Give relays some defenses against the recent network overload. We
11725 start with three defenses (default parameters in parentheses).
11726 First: if a single client address makes too many concurrent
11727 connections (>100), hang up on further connections. Second: if a
11728 single client address makes circuits too quickly (more than 3 per
11729 second, with an allowed burst of 90) while also having too many
11730 connections open (3), refuse new create cells for the next while
11731 (1-2 hours). Third: if a client asks to establish a rendezvous
11732 point to you directly, ignore the request. These defenses can be
11733 manually controlled by new torrc options, but relays will also
11734 take guidance from consensus parameters, so there's no need to
11735 configure anything manually. Implements ticket 24902.
11737 o Minor features (linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
11738 - Update the sandbox rules so that they should now work correctly
11739 with Glibc 2.26. Closes ticket 24315.
11741 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
11742 - Fix an "off by 2" error in counting rendezvous failures on the
11743 onion service side. While we thought we would stop the rendezvous
11744 attempt after one failed circuit, we were actually making three
11745 circuit attempts before giving up. Now switch to a default of 2,
11746 and allow the consensus parameter "hs_service_max_rdv_failures" to
11747 override. Fixes bug 24895; bugfix on 0.0.6.
11749 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
11750 - Add Link protocol version 5 to the supported protocols list. Fixes
11751 bug 25070; bugfix on 0.3.1.1-alpha.
11753 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
11754 - Fix a set of false positives where relays would consider
11755 connections to other relays as being client-only connections (and
11756 thus e.g. deserving different link padding schemes) if those
11757 relays fell out of the consensus briefly. Now we look only at the
11758 initial handshake and whether the connection authenticated as a
11759 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
11761 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
11762 - Make our OOM handler aware of the geoip client history cache so it
11763 doesn't fill up the memory. This check is important for IPv6 and
11764 our DoS mitigation subsystem. Closes ticket 25122.
11766 o Minor feature (relay statistics, backport from 0.3.2.6-alpha):
11767 - Change relay bandwidth reporting stats interval from 4 hours to 24
11768 hours in order to reduce the efficiency of guard discovery
11769 attacks. Fixes ticket 23856.
11771 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
11772 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
11773 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
11774 since they neither disabled TLS 1.3 nor enabled any of the
11775 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
11776 Closes ticket 24978.
11778 o Minor features (fallback directory mirrors, backport from 0.3.2.9):
11779 - The fallback directory list has been re-generated based on the
11780 current status of the network. Tor uses fallback directories to
11781 bootstrap when it doesn't yet have up-to-date directory
11782 information. Closes ticket 24801.
11783 - Make the default DirAuthorityFallbackRate 0.1, so that clients
11784 prefer to bootstrap from fallback directory mirrors. This is a
11785 follow-up to 24679, which removed weights from the default
11786 fallbacks. Implements ticket 24681.
11788 o Minor features (geoip):
11789 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
11792 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
11793 - Use the actual observed address of an incoming relay connection,
11794 not the canonical address of the relay from its descriptor, when
11795 making decisions about how to handle the incoming connection.
11796 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
11798 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
11799 - Directory authorities, when refusing a descriptor from a rejected
11800 relay, now explicitly tell the relay (in its logs) to set a valid
11801 ContactInfo address and contact the bad-relays@ mailing list.
11802 Fixes bug 25170; bugfix on 0.2.9.1.
11804 o Minor bugfixes (address selection, backport from 0.3.2.9):
11805 - When the fascist_firewall_choose_address_ functions don't find a
11806 reachable address, set the returned address to the null address
11807 and port. This is a precautionary measure, because some callers do
11808 not check the return value. Fixes bug 24736; bugfix
11811 o Major bugfixes (bootstrapping, backport from 0.3.2.5-alpha):
11812 - Fetch descriptors aggressively whenever we lack enough to build
11813 circuits, regardless of how many descriptors we are missing.
11814 Previously, we would delay launching the fetch when we had fewer
11815 than 15 missing descriptors, even if some of those descriptors
11816 were blocking circuits from building. Fixes bug 23985; bugfix on
11817 0.1.1.11-alpha. The effects of this bug became worse in
11818 0.3.0.3-alpha, when we began treating missing descriptors from our
11819 primary guards as a reason to delay circuits.
11820 - Don't try fetching microdescriptors from relays that have failed
11821 to deliver them in the past. Fixes bug 23817; bugfix
11824 o Minor bugfixes (compilation, backport from 0.3.2.7-rc):
11825 - Fix a signed/unsigned comparison warning introduced by our fix to
11826 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
11828 o Minor bugfixes (control port, linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
11829 - Avoid a crash when attempting to use the seccomp2 sandbox together
11830 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
11833 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
11834 - Fix a possible crash on malformed consensus. If a consensus had
11835 contained an unparseable protocol line, it could have made clients
11836 and relays crash with a null-pointer exception. To exploit this
11837 issue, however, an attacker would need to be able to subvert the
11838 directory authority system. Fixes bug 25251; bugfix on
11839 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
11841 o Minor bugfixes (directory cache, backport from 0.3.2.5-alpha):
11842 - Recover better from empty or corrupt files in the consensus cache
11843 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
11844 - When a consensus diff calculation is only partially successful,
11845 only record the successful parts as having succeeded. Partial
11846 success can happen if (for example) one compression method fails
11847 but the others succeed. Previously we misrecorded all the
11848 calculations as having succeeded, which would later cause a
11849 nonfatal assertion failure. Fixes bug 24086; bugfix
11852 o Minor bugfixes (entry guards, backport from 0.3.2.3-alpha):
11853 - Tor now updates its guard state when it reads a consensus
11854 regardless of whether it's missing descriptors. That makes tor use
11855 its primary guards to fetch descriptors in some edge cases where
11856 it would previously have used fallback directories. Fixes bug
11857 23862; bugfix on 0.3.0.1-alpha.
11859 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
11860 - Don't treat inability to store a cached consensus object as a bug:
11861 it can happen normally when we are out of disk space. Fixes bug
11862 24859; bugfix on 0.3.1.1-alpha.
11864 o Minor bugfixes (memory usage, backport from 0.3.2.8-rc):
11865 - When queuing DESTROY cells on a channel, only queue the circuit-id
11866 and reason fields: not the entire 514-byte cell. This fix should
11867 help mitigate any bugs or attacks that fill up these queues, and
11868 free more RAM for other uses. Fixes bug 24666; bugfix
11871 o Minor bugfixes (network layer, backport from 0.3.2.5-alpha):
11872 - When closing a connection via close_connection_immediately(), we
11873 mark it as "not blocked on bandwidth", to prevent later calls from
11874 trying to unblock it, and give it permission to read. This fixes a
11875 backtrace warning that can happen on relays under various
11876 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
11878 o Minor bugfixes (path selection, backport from 0.3.2.4-alpha):
11879 - When selecting relays by bandwidth, avoid a rounding error that
11880 could sometimes cause load to be imbalanced incorrectly.
11881 Previously, we would always round upwards; now, we round towards
11882 the nearest integer. This had the biggest effect when a relay's
11883 weight adjustments should have given it weight 0, but it got
11884 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
11885 - When calculating the fraction of nodes that have descriptors, and
11886 all nodes in the network have zero bandwidths, count the number of
11887 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
11888 - Actually log the total bandwidth in compute_weighted_bandwidths().
11889 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
11891 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
11892 - Improve the performance of our consensus-diff application code
11893 when Tor is built with the --enable-fragile-hardening option set.
11894 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
11896 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
11897 - Don't exit the Tor process if setrlimit() fails to change the file
11898 limit (which can happen sometimes on some versions of OSX). Fixes
11899 bug 21074; bugfix on 0.0.9pre5.
11901 o Minor bugfixes (portability, msvc, backport from 0.3.2.9):
11902 - Fix a bug in the bit-counting parts of our timing-wheel code on
11903 MSVC. (Note that MSVC is still not a supported build platform, due
11904 to cyptographic timing channel risks.) Fixes bug 24633; bugfix
11907 o Minor bugfixes (relay, partial backport):
11908 - Make the internal channel_is_client() function look at what sort
11909 of connection handshake the other side used, rather than whether
11910 the other side ever sent a create_fast cell to us. Backports part
11911 of the fixes from bugs 22805 and 24898.
11913 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
11914 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
11916 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
11917 bugfix on 0.2.9.4-alpha.
11919 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
11920 - Update the "rust dependencies" submodule to be a project-level
11921 repository, rather than a user repository. Closes ticket 25323.
11924 Changes in version 0.2.9.15 - 2018-03-03
11925 Tor 0.2.9.15 backports important security and stability bugfixes from
11926 later Tor releases.
11928 It includes an important security fix for a remote crash attack
11929 against directory authorities, tracked as TROVE-2018-001.
11931 This release also backports our new system for improved resistance to
11932 denial-of-service attacks against relays.
11934 This release also fixes several minor bugs and annoyances from
11937 All directory authorities should upgrade to one of the versions
11938 released today. Relays running 0.2.9.x may wish to update to one of
11939 the versions released today, for the DoS mitigations.
11941 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
11942 - Fix a protocol-list handling bug that could be used to remotely crash
11943 directory authorities with a null-pointer exception. Fixes bug 25074;
11944 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
11947 o Major features (denial-of-service mitigation):
11948 - Give relays some defenses against the recent network overload. We
11949 start with three defenses (default parameters in parentheses).
11950 First: if a single client address makes too many concurrent
11951 connections (>100), hang up on further connections. Second: if a
11952 single client address makes circuits too quickly (more than 3 per
11953 second, with an allowed burst of 90) while also having too many
11954 connections open (3), refuse new create cells for the next while
11955 (1-2 hours). Third: if a client asks to establish a rendezvous
11956 point to you directly, ignore the request. These defenses can be
11957 manually controlled by new torrc options, but relays will also
11958 take guidance from consensus parameters, so there's no need to
11959 configure anything manually. Implements ticket 24902.
11961 o Major bugfixes (bootstrapping):
11962 - Fetch descriptors aggressively whenever we lack enough to build
11963 circuits, regardless of how many descriptors we are missing.
11964 Previously, we would delay launching the fetch when we had fewer
11965 than 15 missing descriptors, even if some of those descriptors
11966 were blocking circuits from building. Fixes bug 23985; bugfix on
11967 0.1.1.11-alpha. The effects of this bug became worse in
11968 0.3.0.3-alpha, when we began treating missing descriptors from our
11969 primary guards as a reason to delay circuits.
11971 o Major bugfixes (onion services, retry behavior):
11972 - Fix an "off by 2" error in counting rendezvous failures on the
11973 onion service side. While we thought we would stop the rendezvous
11974 attempt after one failed circuit, we were actually making three
11975 circuit attempts before giving up. Now switch to a default of 2,
11976 and allow the consensus parameter "hs_service_max_rdv_failures" to
11977 override. Fixes bug 24895; bugfix on 0.0.6.
11979 o Minor feature (relay statistics):
11980 - Change relay bandwidth reporting stats interval from 4 hours to 24
11981 hours in order to reduce the efficiency of guard discovery
11982 attacks. Fixes ticket 23856.
11984 o Minor features (compatibility, OpenSSL):
11985 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
11986 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
11987 since they neither disabled TLS 1.3 nor enabled any of the
11988 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
11989 Closes ticket 24978.
11991 o Minor features (denial-of-service avoidance):
11992 - Make our OOM handler aware of the geoip client history cache so it
11993 doesn't fill up the memory. This check is important for IPv6 and
11994 our DoS mitigation subsystem. Closes ticket 25122.
11996 o Minor features (fallback directory mirrors):
11997 - The fallback directory list has been re-generated based on the
11998 current status of the network. Tor uses fallback directories to
11999 bootstrap when it doesn't yet have up-to-date directory
12000 information. Closes ticket 24801.
12001 - Make the default DirAuthorityFallbackRate 0.1, so that clients
12002 prefer to bootstrap from fallback directory mirrors. This is a
12003 follow-up to 24679, which removed weights from the default
12004 fallbacks. Implements ticket 24681.
12006 o Minor features (geoip):
12007 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
12010 o Minor features (linux seccomp2 sandbox):
12011 - Update the sandbox rules so that they should now work correctly
12012 with Glibc 2.26. Closes ticket 24315.
12014 o Minor bugfix (channel connection):
12015 - Use the actual observed address of an incoming relay connection,
12016 not the canonical address of the relay from its descriptor, when
12017 making decisions about how to handle the incoming connection.
12018 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
12020 o Minor bugfix (directory authority):
12021 - Directory authorities, when refusing a descriptor from a rejected
12022 relay, now explicitly tell the relay (in its logs) to set a valid
12023 ContactInfo address and contact the bad-relays@ mailing list.
12024 Fixes bug 25170; bugfix on 0.2.9.1.
12026 o Minor bugfixes (address selection):
12027 - When the fascist_firewall_choose_address_ functions don't find a
12028 reachable address, set the returned address to the null address
12029 and port. This is a precautionary measure, because some callers do
12030 not check the return value. Fixes bug 24736; bugfix
12033 o Minor bugfixes (compilation):
12034 - Fix a signed/unsigned comparison warning introduced by our fix to
12035 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
12037 o Minor bugfixes (control port, linux seccomp2 sandbox):
12038 - Avoid a crash when attempting to use the seccomp2 sandbox together
12039 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
12042 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
12043 - Fix a possible crash on malformed consensus. If a consensus had
12044 contained an unparseable protocol line, it could have made clients
12045 and relays crash with a null-pointer exception. To exploit this
12046 issue, however, an attacker would need to be able to subvert the
12047 directory authority system. Fixes bug 25251; bugfix on
12048 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
12050 o Minor bugfixes (memory usage):
12051 - When queuing DESTROY cells on a channel, only queue the circuit-id
12052 and reason fields: not the entire 514-byte cell. This fix should
12053 help mitigate any bugs or attacks that fill up these queues, and
12054 free more RAM for other uses. Fixes bug 24666; bugfix
12057 o Minor bugfixes (network layer):
12058 - When closing a connection via close_connection_immediately(), we
12059 mark it as "not blocked on bandwidth", to prevent later calls from
12060 trying to unblock it, and give it permission to read. This fixes a
12061 backtrace warning that can happen on relays under various
12062 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
12064 o Minor bugfixes (OSX):
12065 - Don't exit the Tor process if setrlimit() fails to change the file
12066 limit (which can happen sometimes on some versions of OSX). Fixes
12067 bug 21074; bugfix on 0.0.9pre5.
12069 o Minor bugfixes (path selection):
12070 - When selecting relays by bandwidth, avoid a rounding error that
12071 could sometimes cause load to be imbalanced incorrectly.
12072 Previously, we would always round upwards; now, we round towards
12073 the nearest integer. This had the biggest effect when a relay's
12074 weight adjustments should have given it weight 0, but it got
12075 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
12076 - When calculating the fraction of nodes that have descriptors, and
12077 all nodes in the network have zero bandwidths, count the number of
12078 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
12079 - Actually log the total bandwidth in compute_weighted_bandwidths().
12080 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
12082 o Minor bugfixes (portability, msvc):
12083 - Fix a bug in the bit-counting parts of our timing-wheel code on
12084 MSVC. (Note that MSVC is still not a supported build platform, due
12085 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
12088 o Minor bugfixes (relay):
12089 - Make the internal channel_is_client() function look at what sort
12090 of connection handshake the other side used, rather than whether
12091 the other side ever sent a create_fast cell to us. Backports part
12092 of the fixes from bugs 22805 and 24898.
12094 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
12095 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
12097 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
12098 bugfix on 0.2.9.4-alpha.
12101 Changes in version 0.3.2.10 - 2018-03-03
12102 Tor 0.3.2.10 is the second stable release in the 0.3.2 series. It
12103 backports a number of bugfixes, including important fixes for security
12106 It includes an important security fix for a remote crash attack
12107 against directory authorities, tracked as TROVE-2018-001.
12109 Additionally, it backports a fix for a bug whose severity we have
12110 upgraded: Bug 24700, which was fixed in 0.3.3.2-alpha, can be remotely
12111 triggered in order to crash relays with a use-after-free pattern. As
12112 such, we are now tracking that bug as TROVE-2018-002 and
12113 CVE-2018-0491, and backporting it to earlier releases. This bug
12114 affected versions 0.3.2.1-alpha through 0.3.2.9, as well as version
12117 This release also backports our new system for improved resistance to
12118 denial-of-service attacks against relays.
12120 This release also fixes several minor bugs and annoyances from
12123 Relays running 0.3.2.x SHOULD upgrade to one of the versions released
12124 today, for the fix to TROVE-2018-002. Directory authorities should
12125 also upgrade. (Relays on earlier versions might want to update too for
12126 the DoS mitigations.)
12128 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
12129 - Fix a protocol-list handling bug that could be used to remotely crash
12130 directory authorities with a null-pointer exception. Fixes bug 25074;
12131 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
12134 o Major bugfixes (scheduler, KIST, denial-of-service, backport from 0.3.3.2-alpha):
12135 - Avoid adding the same channel twice in the KIST scheduler pending
12136 list, which could lead to remote denial-of-service use-after-free
12137 attacks against relays. Fixes bug 24700; bugfix on 0.3.2.1-alpha.
12139 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
12140 - Give relays some defenses against the recent network overload. We
12141 start with three defenses (default parameters in parentheses).
12142 First: if a single client address makes too many concurrent
12143 connections (>100), hang up on further connections. Second: if a
12144 single client address makes circuits too quickly (more than 3 per
12145 second, with an allowed burst of 90) while also having too many
12146 connections open (3), refuse new create cells for the next while
12147 (1-2 hours). Third: if a client asks to establish a rendezvous
12148 point to you directly, ignore the request. These defenses can be
12149 manually controlled by new torrc options, but relays will also
12150 take guidance from consensus parameters, so there's no need to
12151 configure anything manually. Implements ticket 24902.
12153 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
12154 - Fix an "off by 2" error in counting rendezvous failures on the
12155 onion service side. While we thought we would stop the rendezvous
12156 attempt after one failed circuit, we were actually making three
12157 circuit attempts before giving up. Now switch to a default of 2,
12158 and allow the consensus parameter "hs_service_max_rdv_failures" to
12159 override. Fixes bug 24895; bugfix on 0.0.6.
12160 - New-style (v3) onion services now obey the "max rendezvous circuit
12161 attempts" logic. Previously they would make as many rendezvous
12162 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
12163 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
12165 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
12166 - Add Link protocol version 5 to the supported protocols list. Fixes
12167 bug 25070; bugfix on 0.3.1.1-alpha.
12169 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
12170 - Fix a set of false positives where relays would consider
12171 connections to other relays as being client-only connections (and
12172 thus e.g. deserving different link padding schemes) if those
12173 relays fell out of the consensus briefly. Now we look only at the
12174 initial handshake and whether the connection authenticated as a
12175 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
12177 o Major bugfixes (scheduler, consensus, backport from 0.3.3.2-alpha):
12178 - The scheduler subsystem was failing to promptly notice changes in
12179 consensus parameters, making it harder to switch schedulers
12180 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
12182 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
12183 - Make our OOM handler aware of the geoip client history cache so it
12184 doesn't fill up the memory. This check is important for IPv6 and
12185 our DoS mitigation subsystem. Closes ticket 25122.
12187 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
12188 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
12189 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
12190 since they neither disabled TLS 1.3 nor enabled any of the
12191 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
12192 Closes ticket 24978.
12194 o Minor features (geoip):
12195 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
12198 o Minor features (logging, diagnostic, backport from 0.3.3.2-alpha):
12199 - When logging a failure to create an onion service's descriptor,
12200 also log what the problem with the descriptor was. Diagnostic
12203 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
12204 - Use the actual observed address of an incoming relay connection,
12205 not the canonical address of the relay from its descriptor, when
12206 making decisions about how to handle the incoming connection.
12207 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
12209 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
12210 - Fix a possible crash on malformed consensus. If a consensus had
12211 contained an unparseable protocol line, it could have made clients
12212 and relays crash with a null-pointer exception. To exploit this
12213 issue, however, an attacker would need to be able to subvert the
12214 directory authority system. Fixes bug 25251; bugfix on
12215 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
12217 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
12218 - Directory authorities, when refusing a descriptor from a rejected
12219 relay, now explicitly tell the relay (in its logs) to set a valid
12220 ContactInfo address and contact the bad-relays@ mailing list.
12221 Fixes bug 25170; bugfix on 0.2.9.1.
12223 o Minor bugfixes (build, rust, backport from 0.3.3.1-alpha):
12224 - When building with Rust on OSX, link against libresolv, to work
12225 around the issue at https://github.com/rust-lang/rust/issues/46797.
12226 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
12228 o Minor bugfixes (onion services, backport from 0.3.3.2-alpha):
12229 - Remove a BUG() statement when a client fetches an onion descriptor
12230 that has a lower revision counter than the one in its cache. This
12231 can happen in normal circumstances due to HSDir desync. Fixes bug
12232 24976; bugfix on 0.3.2.1-alpha.
12234 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
12235 - Don't treat inability to store a cached consensus object as a bug:
12236 it can happen normally when we are out of disk space. Fixes bug
12237 24859; bugfix on 0.3.1.1-alpha.
12239 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
12240 - Improve the performance of our consensus-diff application code
12241 when Tor is built with the --enable-fragile-hardening option set.
12242 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
12244 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
12245 - Don't exit the Tor process if setrlimit() fails to change the file
12246 limit (which can happen sometimes on some versions of OSX). Fixes
12247 bug 21074; bugfix on 0.0.9pre5.
12249 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
12250 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
12252 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
12253 bugfix on 0.2.9.4-alpha.
12255 o Minor bugfixes (testing, backport from 0.3.3.1-alpha):
12256 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
12257 25005; bugfix on 0.3.2.7-rc.
12259 o Minor bugfixes (v3 onion services, backport from 0.3.3.2-alpha):
12260 - Look at the "HSRend" protocol version, not the "HSDir" protocol
12261 version, when deciding whether a consensus entry can support the
12262 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
12263 bugfix on 0.3.2.1-alpha.
12265 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
12266 - Update the "rust dependencies" submodule to be a project-level
12267 repository, rather than a user repository. Closes ticket 25323.
12269 o Documentation (backport from 0.3.3.1-alpha)
12270 - Document that operators who run more than one relay or bridge are
12271 expected to set MyFamily and ContactInfo correctly. Closes
12275 Changes in version 0.3.3.3-alpha - 2018-03-03
12276 Tor 0.3.3.3-alpha is the third alpha release for the 0.3.3.x series.
12277 It includes an important security fix for a remote crash attack
12278 against directory authorities tracked as TROVE-2018-001.
12280 Additionally, with this release, we are upgrading the severity of a
12281 bug fixed in 0.3.3.2-alpha. Bug 24700, which was fixed in
12282 0.3.3.2-alpha, can be remotely triggered in order to crash relays with
12283 a use-after-free pattern. As such, we are now tracking that bug as
12284 TROVE-2018-002 and CVE-2018-0491. This bug affected versions
12285 0.3.2.1-alpha through 0.3.2.9, as well as 0.3.3.1-alpha.
12287 This release also fixes several minor bugs and annoyances from
12290 Relays running 0.3.2.x should upgrade to one of the versions released
12291 today, for the fix to TROVE-2018-002. Directory authorities should
12292 also upgrade. (Relays on earlier versions might want to update too for
12293 the DoS mitigations.)
12295 o Major bugfixes (denial-of-service, directory authority):
12296 - Fix a protocol-list handling bug that could be used to remotely crash
12297 directory authorities with a null-pointer exception. Fixes bug 25074;
12298 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
12301 o Minor features (compatibility, OpenSSL):
12302 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
12303 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
12304 since they neither disabled TLS 1.3 nor enabled any of the
12305 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
12306 Closes ticket 24978.
12308 o Minor features (logging):
12309 - Clarify the log messages produced when getrandom() or a related
12310 entropy-generation mechanism gives an error. Closes ticket 25120.
12312 o Minor features (testing):
12313 - Add a "make test-rust" target to run the rust tests only. Closes
12316 o Minor bugfixes (denial-of-service):
12317 - Fix a possible crash on malformed consensus. If a consensus had
12318 contained an unparseable protocol line, it could have made clients
12319 and relays crash with a null-pointer exception. To exploit this
12320 issue, however, an attacker would need to be able to subvert the
12321 directory authority system. Fixes bug 25251; bugfix on
12322 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
12324 o Minor bugfixes (DoS mitigation):
12325 - Add extra safety checks when refilling the circuit creation bucket
12326 to ensure we never set a value above the allowed maximum burst.
12327 Fixes bug 25202; bugfix on 0.3.3.2-alpha.
12328 - When a new consensus arrives, don't update our DoS-mitigation
12329 parameters if we aren't a public relay. Fixes bug 25223; bugfix
12332 o Minor bugfixes (man page, SocksPort):
12333 - Remove dead code from the old "SocksSocket" option, and rename
12334 SocksSocketsGroupWritable to UnixSocksGroupWritable. The old option
12335 still works, but is deprecated. Fixes bug 24343; bugfix on 0.2.6.3.
12337 o Minor bugfixes (performance):
12338 - Reduce the number of circuits that will be opened at once during
12339 the circuit build timeout phase. This is done by increasing the
12340 idle timeout to 3 minutes, and lowering the maximum number of
12341 concurrent learning circuits to 10. Fixes bug 24769; bugfix
12344 o Minor bugfixes (spec conformance):
12345 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
12347 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
12348 bugfix on 0.2.9.4-alpha.
12350 o Minor bugfixes (spec conformance, rust):
12351 - Resolve a denial-of-service issue caused by an infinite loop in
12352 the rust protover code. Fixes bug 25250, bugfix on 0.3.3.1-alpha.
12353 Also tracked as TROVE-2018-003.
12355 o Code simplification and refactoring:
12356 - Update the "rust dependencies" submodule to be a project-level
12357 repository, rather than a user repository. Closes ticket 25323.
12360 Changes in version 0.3.3.2-alpha - 2018-02-10
12361 Tor 0.3.3.2-alpha is the second alpha in the 0.3.3.x series. It
12362 introduces a mechanism to handle the high loads that many relay
12363 operators have been reporting recently. It also fixes several bugs in
12364 older releases. If this new code proves reliable, we plan to backport
12365 it to older supported release series.
12367 o Major features (denial-of-service mitigation):
12368 - Give relays some defenses against the recent network overload. We
12369 start with three defenses (default parameters in parentheses).
12370 First: if a single client address makes too many concurrent
12371 connections (>100), hang up on further connections. Second: if a
12372 single client address makes circuits too quickly (more than 3 per
12373 second, with an allowed burst of 90) while also having too many
12374 connections open (3), refuse new create cells for the next while
12375 (1-2 hours). Third: if a client asks to establish a rendezvous
12376 point to you directly, ignore the request. These defenses can be
12377 manually controlled by new torrc options, but relays will also
12378 take guidance from consensus parameters, so there's no need to
12379 configure anything manually. Implements ticket 24902.
12381 o Major bugfixes (netflow padding):
12382 - Stop adding unneeded channel padding right after we finish
12383 flushing to a connection that has been trying to flush for many
12384 seconds. Instead, treat all partial or complete flushes as
12385 activity on the channel, which will defer the time until we need
12386 to add padding. This fix should resolve confusing and scary log
12387 messages like "Channel padding timeout scheduled 221453ms in the
12388 past." Fixes bug 22212; bugfix on 0.3.1.1-alpha.
12390 o Major bugfixes (protocol versions):
12391 - Add Link protocol version 5 to the supported protocols list. Fixes
12392 bug 25070; bugfix on 0.3.1.1-alpha.
12394 o Major bugfixes (scheduler, consensus):
12395 - The scheduler subsystem was failing to promptly notice changes in
12396 consensus parameters, making it harder to switch schedulers
12397 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
12399 o Minor features (denial-of-service avoidance):
12400 - Make our OOM handler aware of the geoip client history cache so it
12401 doesn't fill up the memory. This check is important for IPv6 and
12402 our DoS mitigation subsystem. Closes ticket 25122.
12404 o Minor features (directory authority):
12405 - When directory authorities are unable to add signatures to a
12406 pending consensus, log the reason why. Closes ticket 24849.
12408 o Minor features (geoip):
12409 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
12412 o Minor features (logging, diagnostic):
12413 - When logging a failure to create an onion service's descriptor,
12414 also log what the problem with the descriptor was. Diagnostic for
12417 o Minor bugfix (channel connection):
12418 - Use the actual observed address of an incoming relay connection,
12419 not the canonical address of the relay from its descriptor, when
12420 making decisions about how to handle the incoming connection.
12421 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
12423 o Minor bugfix (directory authority):
12424 - Directory authorities, when refusing a descriptor from a rejected
12425 relay, now explicitly tell the relay (in its logs) to set a valid
12426 ContactInfo address and contact the bad-relays@ mailing list.
12427 Fixes bug 25170; bugfix on 0.2.9.1.
12429 o Minor bugfixes (all versions of Tor):
12430 - Use the "misspell" tool to detect and fix typos throughout the
12431 source code. Fixes bug 23650; bugfix on various versions of Tor.
12432 Patch from Deepesh Pathak.
12434 o Minor bugfixes (circuit, cannibalization):
12435 - Don't cannibalize preemptively-built circuits if we no longer
12436 recognize their first hop. This situation can happen if our Guard
12437 relay went off the consensus after the circuit was created. Fixes
12438 bug 24469; bugfix on 0.0.6.
12440 o Minor bugfixes (correctness):
12441 - Remove a nonworking, unnecessary check to see whether a circuit
12442 hop's identity digest was set when the circuit failed. Fixes bug
12443 24927; bugfix on 0.2.4.4-alpha.
12445 o Minor bugfixes (logging):
12446 - Don't treat inability to store a cached consensus object as a bug:
12447 it can happen normally when we are out of disk space. Fixes bug
12448 24859; bugfix on 0.3.1.1-alpha.
12449 - Fix a (mostly harmless) race condition when invoking
12450 LOG_PROTOCOL_WARN message from a subthread while the torrc options
12451 are changing. Fixes bug 23954; bugfix on 0.1.1.9-alpha.
12453 o Minor bugfixes (onion services):
12454 - Remove a BUG() statement when a client fetches an onion descriptor
12455 that has a lower revision counter than the one in its cache. This
12456 can happen in normal circumstances due to HSDir desync. Fixes bug
12457 24976; bugfix on 0.3.2.1-alpha.
12458 - If we are configured to offer a single onion service, don't log
12459 long-term established one hop rendezvous points in the heartbeat.
12460 Fixes bug 25116; bugfix on 0.2.9.6-rc.
12462 o Minor bugfixes (performance):
12463 - Avoid calling protocol_list_supports_protocol() from inside tight
12464 loops when running with cached routerinfo_t objects. Instead,
12465 summarize the relevant protocols as flags in the routerinfo_t, as
12466 we do for routerstatus_t objects. This change simplifies our code
12467 a little, and saves a large amount of short-term memory allocation
12468 operations. Fixes bug 25008; bugfix on 0.2.9.4-alpha.
12470 o Minor bugfixes (Rust FFI):
12471 - Fix a minor memory leak which would happen whenever the C code
12472 would call the Rust implementation of
12473 protover_get_supported_protocols(). This was due to the C version
12474 returning a static string, whereas the Rust version newly allocated
12475 a CString to pass across the FFI boundary. Consequently, the C
12476 code was not expecting to need to free() what it was given. Fixes
12477 bug 25127; bugfix on 0.3.2.1-alpha.
12479 o Minor bugfixes (scheduler, KIST):
12480 - Avoid adding the same channel twice in the KIST scheduler pending
12481 list, which would waste CPU cycles. Fixes bug 24700; bugfix
12484 o Minor bugfixes (unit test, monotonic time):
12485 - Increase a constant (1msec to 10msec) in the monotonic time test
12486 that makes sure the nsec/usec/msec times read are synchronized.
12487 This change was needed to accommodate slow systems like armel or
12488 when the clock_gettime() is not a VDSO on the running kernel.
12489 Fixes bug 25113; bugfix on 0.2.9.1.
12491 o Minor bugfixes (v3 onion services):
12492 - Look at the "HSRend" protocol version, not the "HSDir" protocol
12493 version, when deciding whether a consensus entry can support the
12494 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
12495 bugfix on 0.3.2.1-alpha.
12497 o Code simplification and refactoring:
12498 - Remove the unused nodelist_recompute_all_hsdir_indices(). Closes
12500 - Remove a series of counters used to track circuit extend attempts
12501 and connection status but that in reality we aren't using for
12502 anything other than stats logged by a SIGUSR1 signal. Closes
12505 o Documentation (man page):
12506 - The HiddenServiceVersion torrc option accepts only one number:
12507 either version 2 or 3. Closes ticket 25026; bugfix
12511 Changes in version 0.3.3.1-alpha - 2018-01-25
12512 Tor 0.3.3.1-alpha is the first release in the 0.3.3.x series. It adds
12513 several new features to Tor, including several improvements to
12514 bootstrapping, and support for an experimental "vanguards" feature to
12515 resist guard discovery attacks. This series also includes better
12516 support for applications that need to embed Tor or manage v3
12519 o Major features (embedding):
12520 - There is now a documented stable API for programs that need to
12521 embed Tor. See tor_api.h for full documentation and known bugs.
12522 Closes ticket 23684.
12523 - Tor now has support for restarting in the same process.
12524 Controllers that run Tor using the "tor_api.h" interface can now
12525 restart Tor after Tor has exited. This support is incomplete,
12526 however: we fixed crash bugs that prevented it from working at
12527 all, but many bugs probably remain, including a possibility of
12528 security issues. Implements ticket 24581.
12530 o Major features (IPv6, directory documents):
12531 - Add consensus method 27, which adds IPv6 ORPorts to the microdesc
12532 consensus. This information makes it easier for IPv6 clients to
12533 bootstrap and choose reachable entry guards. Implements ticket 23826.
12534 - Add consensus method 28, which removes IPv6 ORPorts from
12535 microdescriptors. Now that the consensus contains IPv6 ORPorts, they
12536 are redundant in microdescs. This change will be used by Tor clients
12537 on 0.2.8.x and later. (That is to say, with all Tor clients that
12538 have IPv6 bootstrap and guard support.) Implements ticket 23828.
12539 - Expand the documentation for AuthDirHasIPv6Connectivity when it is
12540 set by different numbers of authorities. Fixes 23870
12543 o Major features (onion service v3, control port):
12544 - The control port now supports commands and events for v3 onion
12545 services. It is now possible to create ephemeral v3 services using
12546 ADD_ONION. Additionally, several events (HS_DESC, HS_DESC_CONTENT,
12547 CIRC and CIRC_MINOR) and commands (GETINFO, HSPOST, ADD_ONION and
12548 DEL_ONION) have been extended to support v3 onion services. Closes
12549 ticket 20699; implements proposal 284.
12551 o Major features (onion services):
12552 - Provide torrc options to pin the second and third hops of onion
12553 service circuits to a list of nodes. The option HSLayer2Guards
12554 pins the second hop, and the option HSLayer3Guards pins the third
12555 hop. These options are for use in conjunction with experiments
12556 with "vanguards" for preventing guard enumeration attacks. Closes
12559 o Major features (rust, portability, experimental):
12560 - Tor now ships with an optional implementation of one of its
12561 smaller modules (protover.c) in the Rust programming language. To
12562 try it out, install a Rust build environment, and configure Tor
12563 with "--enable-rust --enable-cargo-online-mode". This should not
12564 cause any user-visible changes, but should help us gain more
12565 experience with Rust, and plan future Rust integration work.
12566 Implementation by Chelsea Komlo. Closes ticket 22840.
12568 o Minor features (storage, configuration):
12569 - Users can store cached directory documents somewhere other than
12570 the DataDirectory by using the CacheDirectory option. Similarly,
12571 the storage location for relay's keys can be overridden with the
12572 KeyDirectory option. Closes ticket 22703.
12574 o Major features (v3 onion services, ipv6):
12575 - When v3 onion service clients send introduce cells, they now
12576 include the IPv6 address of the rendezvous point, if it has one.
12577 Current v3 onion services running 0.3.2 ignore IPv6 addresses, but
12578 in future Tor versions, IPv6-only v3 single onion services will be
12579 able to use IPv6 addresses to connect directly to the rendezvous
12580 point. Closes ticket 23577. Patch by Neel Chauhan.
12582 o Major bugfixes (onion services, retry behavior):
12583 - Fix an "off by 2" error in counting rendezvous failures on the
12584 onion service side. While we thought we would stop the rendezvous
12585 attempt after one failed circuit, we were actually making three
12586 circuit attempts before giving up. Now switch to a default of 2,
12587 and allow the consensus parameter "hs_service_max_rdv_failures" to
12588 override. Fixes bug 24895; bugfix on 0.0.6.
12589 - New-style (v3) onion services now obey the "max rendezvous circuit
12590 attempts" logic. Previously they would make as many rendezvous
12591 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
12592 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
12594 o Major bugfixes (relays):
12595 - Fix a set of false positives where relays would consider
12596 connections to other relays as being client-only connections (and
12597 thus e.g. deserving different link padding schemes) if those
12598 relays fell out of the consensus briefly. Now we look only at the
12599 initial handshake and whether the connection authenticated as a
12600 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
12602 o Minor feature (IPv6):
12603 - Make IPv6-only clients wait for microdescs for relays, even if we
12604 were previously using descriptors (or were using them as a bridge)
12605 and have a cached descriptor for them. Implements ticket 23827.
12606 - When a consensus has IPv6 ORPorts, make IPv6-only clients use
12607 them, rather than waiting to download microdescriptors.
12608 Implements ticket 23827.
12610 o Minor features (cleanup):
12611 - Tor now deletes the CookieAuthFile and ExtORPortCookieAuthFile
12612 when it stops. Closes ticket 23271.
12614 o Minor features (defensive programming):
12615 - Most of the functions in Tor that free objects have been replaced
12616 with macros that free the objects and set the corresponding
12617 pointers to NULL. This change should help prevent a large class of
12618 dangling pointer bugs. Closes ticket 24337.
12619 - Where possible, the tor_free() macro now only evaluates its input
12620 once. Part of ticket 24337.
12621 - Check that microdesc ed25519 ids are non-zero in
12622 node_get_ed25519_id() before returning them. Implements ticket
12623 24001, patch by "aruna1234".
12625 o Minor features (embedding):
12626 - Tor can now start with a preauthenticated control connection
12627 created by the process that launched it. This feature is meant for
12628 use by programs that want to launch and manage a Tor process
12629 without allowing other programs to manage it as well. For more
12630 information, see the __OwningControllerFD option documented in
12631 control-spec.txt. Closes ticket 23900.
12632 - On most errors that would cause Tor to exit, it now tries to
12633 return from the tor_main() function, rather than calling the
12634 system exit() function. Most users won't notice a difference here,
12635 but it should be significant for programs that run Tor inside
12636 a separate thread: they should now be able to survive Tor's exit
12637 conditions rather than having Tor shut down the entire process.
12638 Closes ticket 23848.
12639 - Applications that want to embed Tor can now tell Tor not to
12640 register any of its own POSIX signal handlers, using the
12641 __DisableSignalHandlers option. Closes ticket 24588.
12643 o Minor features (fallback directory list):
12644 - Avoid selecting fallbacks that change their IP addresses too
12645 often. Select more fallbacks by ignoring the Guard flag, and
12646 allowing lower cutoffs for the Running and V2Dir flags. Also allow
12647 a lower bandwidth, and a higher number of fallbacks per operator
12648 (5% of the list). Implements ticket 24785.
12649 - Update the fallback whitelist and blacklist based on opt-ins and
12650 relay changes. Closes tickets 22321, 24678, 22527, 24135,
12653 o Minor features (fallback directory mirror configuration):
12654 - Add a nickname to each fallback in a C comment. This makes it
12655 easier for operators to find their relays, and allows stem to use
12656 nicknames to identify fallbacks. Implements ticket 24600.
12657 - Add a type and version header to the fallback directory mirror
12658 file. Also add a delimiter to the end of each fallback entry. This
12659 helps external parsers like stem and Relay Search. Implements
12661 - Add an extrainfo cache flag for each fallback in a C comment. This
12662 allows stem to use fallbacks to fetch extra-info documents, rather
12663 than using authorities. Implements ticket 22759.
12664 - Add the generateFallbackDirLine.py script for automatically
12665 generating fallback directory mirror lines from relay fingerprints.
12666 No more typos! Add the lookupFallbackDirContact.py script for
12667 automatically looking up operator contact info from relay
12668 fingerprints. Implements ticket 24706, patch by teor and atagar.
12669 - Reject any fallback directory mirror that serves an expired
12670 consensus. Implements ticket 20942, patch by "minik".
12671 - Remove commas and equals signs from external string inputs to the
12672 fallback list. This avoids format confusion attacks. Implements
12674 - Remove the "weight=10" line from fallback directory mirror
12675 entries. Ticket 24681 will maintain the current fallback weights
12676 by changing Tor's default fallback weight to 10. Implements
12678 - Stop logging excessive information about fallback netblocks.
12679 Implements ticket 24791.
12681 o Minor features (forward-compatibility):
12682 - If a relay supports some link authentication protocol that we do
12683 not recognize, then include that relay's ed25519 key when telling
12684 other relays to extend to it. Previously, we treated future
12685 versions as if they were too old to support ed25519 link
12686 authentication. Closes ticket 20895.
12688 o Minor features (heartbeat):
12689 - Add onion service information to our heartbeat logs, displaying
12690 stats about the activity of configured onion services. Closes
12693 o Minor features (instrumentation, development):
12694 - Add the MainloopStats option to allow developers to get
12695 instrumentation information from the main event loop via the
12696 heartbeat messages. We hope to use this to improve Tor's behavior
12697 when it's trying to sleep. Closes ticket 24605.
12699 o Minor features (log messages):
12700 - Improve a warning message that happens when we fail to re-parse an
12701 old router because of an expired certificate. Closes ticket 20020.
12702 - Make the log more quantitative when we hit MaxMemInQueues
12703 threshold exposing some values. Closes ticket 24501.
12705 o Minor features (logging, android):
12706 - Added support for the Android logging subsystem. Closes
12709 o Minor features (performance):
12710 - Support predictive circuit building for onion service circuits
12711 with multiple layers of guards. Closes ticket 23101.
12712 - Use stdatomic.h where available, rather than mutexes, to implement
12713 atomic_counter_t. Closes ticket 23953.
12715 o Minor features (performance, 32-bit):
12716 - Improve performance on 32-bit systems by avoiding 64-bit division
12717 when calculating the timestamp in milliseconds for channel padding
12718 computations. Implements ticket 24613.
12719 - Improve performance on 32-bit systems by avoiding 64-bit division
12720 when timestamping cells and buffer chunks for OOM calculations.
12721 Implements ticket 24374.
12723 o Minor features (performance, OSX, iOS):
12724 - Use the mach_approximate_time() function (when available) to
12725 implement coarse monotonic time. Having a coarse time function
12726 should avoid a large number of system calls, and improve
12727 performance slightly, especially under load. Closes ticket 24427.
12729 o Minor features (performance, windows):
12730 - Improve performance on Windows Vista and Windows 7 by adjusting
12731 TCP send window size according to the recommendation from
12732 SIO_IDEAL_SEND_BACKLOG_QUERY. Closes ticket 22798. Patch
12735 o Major features (relay):
12736 - Implement an option, ReducedExitPolicy, to allow an Tor exit relay
12737 operator to use a more reasonable ("reduced") exit policy, rather
12738 than the default one. If you want to run an exit node without
12739 thinking too hard about which ports to allow, this one is for you.
12740 Closes ticket 13605. Patch from Neel Chauhan.
12742 o Minor features (testing, debugging, embedding):
12743 - For development purposes, Tor now has a mode in which it runs for
12744 a few seconds, then stops, and starts again without exiting the
12745 process. This mode is meant to help us debug various issues with
12746 ticket 23847. To use this feature, compile with
12747 --enable-restart-debugging, and set the TOR_DEBUG_RESTART
12748 environment variable. This is expected to crash a lot, and is
12749 really meant for developers only. It will likely be removed in a
12750 future release. Implements ticket 24583.
12752 o Minor bugfix (network IPv6 test):
12753 - Tor's test scripts now check if "ping -6 ::1" works when the user
12754 runs "make test-network-all". Fixes bug 24677; bugfix on
12755 0.2.9.3-alpha. Patch by "ffmancera".
12757 o Minor bugfixes (build, rust):
12758 - Fix output of autoconf checks to display success messages for Rust
12759 dependencies and a suitable rustc compiler version. Fixes bug
12760 24612; bugfix on 0.3.1.3-alpha.
12761 - When building with Rust on OSX, link against libresolv, to work
12762 around the issue at https://github.com/rust-lang/rust/issues/46797.
12763 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
12764 - Don't pass the --quiet option to cargo: it seems to suppress some
12765 errors, which is not what we want to do when building. Fixes bug
12766 24518; bugfix on 0.3.1.7.
12767 - Build correctly when building from outside Tor's source tree with
12768 the TOR_RUST_DEPENDENCIES option set. Fixes bug 22768; bugfix
12771 o Minor bugfixes (directory authorities, IPv6):
12772 - When creating a routerstatus (vote) from a routerinfo (descriptor),
12773 set the IPv6 address to the unspecified IPv6 address, and
12774 explicitly initialize the port to zero. Fixes bug 24488; bugfix
12777 o Minor bugfixes (fallback directory mirrors):
12778 - Make updateFallbackDirs.py search harder for python. (Some OSs
12779 don't put it in /usr/bin.) Fixes bug 24708; bugfix
12782 o Minor bugfixes (hibernation, bandwidth accounting, shutdown):
12783 - When hibernating, close connections normally and allow them to
12784 flush. Fixes bug 23571; bugfix on 0.2.4.7-alpha. Also fixes
12786 - Do not attempt to launch self-reachability tests when entering
12787 hibernation. Fixes a case of bug 12062; bugfix on 0.0.9pre5.
12788 - Resolve several bugs related to descriptor fetching on bridge
12789 clients with bandwidth accounting enabled. (This combination is
12790 not recommended!) Fixes a case of bug 12062; bugfix
12792 - When hibernating, do not attempt to launch DNS checks. Fixes a
12793 case of bug 12062; bugfix on 0.1.2.2-alpha.
12794 - When hibernating, do not try to upload or download descriptors.
12795 Fixes a case of bug 12062; bugfix on 0.0.9pre5.
12797 o Minor bugfixes (IPv6, bridges):
12798 - Tor now always sets IPv6 preferences for bridges. Fixes bug 24573;
12799 bugfix on 0.2.8.2-alpha.
12800 - Tor now sets IPv6 address in the routerstatus as well as in the
12801 router descriptors when updating addresses for a bridge. Closes
12802 ticket 24572; bugfix on 0.2.4.5-alpha. Patch by "ffmancera".
12804 o Minor bugfixes (linux seccomp2 sandbox):
12805 - When running with the sandbox enabled, reload configuration files
12806 correctly even when %include was used. Previously we would crash.
12807 Fixes bug 22605; bugfix on 0.3.1. Patch from Daniel Pinto.
12809 o Minor bugfixes (memory leaks):
12810 - Avoid possible at-exit memory leaks related to use of Libevent's
12811 event_base_once() function. (This function tends to leak memory if
12812 the event_base is closed before the event fires.) Fixes bug 24584;
12813 bugfix on 0.2.8.1-alpha.
12814 - Fix a harmless memory leak in tor-resolve. Fixes bug 24582; bugfix
12817 o Minor bugfixes (OSX):
12818 - Don't exit the Tor process if setrlimit() fails to change the file
12819 limit (which can happen sometimes on some versions of OSX). Fixes
12820 bug 21074; bugfix on 0.0.9pre5.
12822 o Minor bugfixes (performance, fragile-hardening):
12823 - Improve the performance of our consensus-diff application code
12824 when Tor is built with the --enable-fragile-hardening option set.
12825 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
12827 o Minor bugfixes (performance, timeouts):
12828 - Consider circuits for timeout as soon as they complete a hop. This
12829 is more accurate than applying the timeout in
12830 circuit_expire_building() because that function is only called
12831 once per second, which is now too slow for typical timeouts on the
12832 current network. Fixes bug 23114; bugfix on 0.2.2.2-alpha.
12833 - Use onion service circuits (and other circuits longer than 3 hops)
12834 to calculate a circuit build timeout. Previously, Tor only
12835 calculated its build timeout based on circuits that planned to be
12836 exactly 3 hops long. With this change, we include measurements
12837 from all circuits at the point where they complete their third
12838 hop. Fixes bug 23100; bugfix on 0.2.2.2-alpha.
12840 o Minor bugfixes (testing):
12841 - Give out Exit flags in bootstrapping networks. Fixes bug 24137;
12842 bugfix on 0.2.3.1-alpha.
12843 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
12844 25005; bugfix on 0.3.2.7-rc.
12846 o Code simplification and refactoring:
12847 - Remove /usr/athena from search path in configure.ac. Closes
12849 - Remove duplicate code in node_has_curve25519_onion_key() and
12850 node_get_curve25519_onion_key(), and add a check for a zero
12851 microdesc curve25519 onion key. Closes ticket 23966, patch by
12852 "aruna1234" and teor.
12853 - Rewrite channel_rsa_id_group_set_badness to reduce temporary
12854 memory allocations with large numbers of OR connections (e.g.
12855 relays). Closes ticket 24119.
12856 - Separate the function that deletes ephemeral files when Tor
12858 - Small changes to Tor's buf_t API to make it suitable for use as a
12859 general-purpose safe string constructor. Closes ticket 22342.
12860 - Switch -Wnormalized=id to -Wnormalized=nfkc in configure.ac to
12861 avoid source code identifier confusion. Closes ticket 24467.
12862 - The tor_git_revision[] constant no longer needs to be redeclared
12863 by everything that links against the rest of Tor. Done as part of
12864 ticket 23845, to simplify our external API.
12865 - We make extend_info_from_node() use node_get_curve25519_onion_key()
12866 introduced in ticket 23577 to access the curve25519 public keys
12867 rather than accessing it directly. Closes ticket 23760. Patch by
12869 - Add a function to log channels' scheduler state changes to aid
12870 debugging efforts. Closes ticket 24531.
12873 - Add documentation on how to build tor with Rust dependencies
12874 without having to be online. Closes ticket 22907; bugfix
12876 - Clarify the behavior of RelayBandwidth{Rate,Burst} with client
12877 traffic. Closes ticket 24318.
12878 - Document that OutboundBindAddress doesn't apply to DNS requests.
12879 Closes ticket 22145. Patch from Aruna Maurya.
12880 - Document that operators who run more than one relay or bridge are
12881 expected to set MyFamily and ContactInfo correctly. Closes
12884 o Code simplification and refactoring (channels):
12885 - Remove the incoming and outgoing channel queues. These were never
12886 used, but still took up a step in our fast path.
12887 - The majority of the channel unit tests have been rewritten and the
12888 code coverage has now been raised to 83.6% for channel.c. Closes
12890 - Remove other dead code from the channel subsystem: All together,
12891 this cleanup has removed more than 1500 lines of code overall and
12892 adding very little except for unit test.
12894 o Code simplification and refactoring (circuit rendezvous):
12895 - Split the client-side rendezvous circuit lookup into two
12896 functions: one that returns only established circuits and another
12897 that returns all kinds of circuits. Closes ticket 23459.
12899 o Code simplification and refactoring (controller):
12900 - Make most of the variables in networkstatus_getinfo_by_purpose()
12901 const. Implements ticket 24489.
12904 Changes in version 0.3.2.9 - 2018-01-09
12905 Tor 0.3.2.9 is the first stable release in the 0.3.2 series.
12907 The 0.3.2 series includes our long-anticipated new onion service
12908 design, with numerous security features. (For more information, see
12909 our blog post at https://blog.torproject.org/fall-harvest.) We also
12910 have a new circuit scheduler algorithm for improved performance on
12911 relays everywhere (see https://blog.torproject.org/kist-and-tell),
12912 along with many smaller features and bugfixes.
12914 Per our stable release policy, we plan to support each stable release
12915 series for at least the next nine months, or for three months after
12916 the first stable release of the next series: whichever is longer. If
12917 you need a release with long-term support, we recommend that you stay
12918 with the 0.2.9 series.
12920 Below is a list of the changes since 0.3.2.8-rc. For a list of all
12921 changes since 0.3.1, see the ReleaseNotes file.
12923 o Minor features (fallback directory mirrors):
12924 - The fallback directory list has been re-generated based on the
12925 current status of the network. Tor uses fallback directories to
12926 bootstrap when it doesn't yet have up-to-date directory
12927 information. Closes ticket 24801.
12928 - Make the default DirAuthorityFallbackRate 0.1, so that clients
12929 prefer to bootstrap from fallback directory mirrors. This is a
12930 follow-up to 24679, which removed weights from the default
12931 fallbacks. Implements ticket 24681.
12933 o Minor features (geoip):
12934 - Update geoip and geoip6 to the January 5 2018 Maxmind GeoLite2
12937 o Minor bugfixes (address selection):
12938 - When the fascist_firewall_choose_address_ functions don't find a
12939 reachable address, set the returned address to the null address
12940 and port. This is a precautionary measure, because some callers do
12941 not check the return value. Fixes bug 24736; bugfix
12944 o Minor bugfixes (compilation):
12945 - Resolve a few shadowed-variable warnings in the onion service
12946 code. Fixes bug 24634; bugfix on 0.3.2.1-alpha.
12948 o Minor bugfixes (portability, msvc):
12949 - Fix a bug in the bit-counting parts of our timing-wheel code on
12950 MSVC. (Note that MSVC is still not a supported build platform, due
12951 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
12955 Changes in version 0.3.2.8-rc - 2017-12-21
12956 Tor 0.3.2.8-rc fixes a pair of bugs in the KIST and KISTLite
12957 schedulers that had led servers under heavy load to overload their
12958 outgoing connections. All relay operators running earlier 0.3.2.x
12959 versions should upgrade. This version also includes a mitigation for
12960 over-full DESTROY queues leading to out-of-memory conditions: if it
12961 works, we will soon backport it to earlier release series.
12963 This is the second release candidate in the 0.3.2 series. If we find
12964 no new bugs or regression here, then the first stable 0.3.2 release
12965 will be nearly identical to this.
12967 o Major bugfixes (KIST, scheduler):
12968 - The KIST scheduler did not correctly account for data already
12969 enqueued in each connection's send socket buffer, particularly in
12970 cases when the TCP/IP congestion window was reduced between
12971 scheduler calls. This situation lead to excessive per-connection
12972 buffering in the kernel, and a potential memory DoS. Fixes bug
12973 24665; bugfix on 0.3.2.1-alpha.
12975 o Minor features (geoip):
12976 - Update geoip and geoip6 to the December 6 2017 Maxmind GeoLite2
12979 o Minor bugfixes (hidden service v3):
12980 - Bump hsdir_spread_store parameter from 3 to 4 in order to increase
12981 the probability of reaching a service for a client missing
12982 microdescriptors. Fixes bug 24425; bugfix on 0.3.2.1-alpha.
12984 o Minor bugfixes (memory usage):
12985 - When queuing DESTROY cells on a channel, only queue the circuit-id
12986 and reason fields: not the entire 514-byte cell. This fix should
12987 help mitigate any bugs or attacks that fill up these queues, and
12988 free more RAM for other uses. Fixes bug 24666; bugfix
12991 o Minor bugfixes (scheduler, KIST):
12992 - Use a sane write limit for KISTLite when writing onto a connection
12993 buffer instead of using INT_MAX and shoving as much as it can.
12994 Because the OOM handler cleans up circuit queues, we are better
12995 off at keeping them in that queue instead of the connection's
12996 buffer. Fixes bug 24671; bugfix on 0.3.2.1-alpha.
12999 Changes in version 0.3.2.7-rc - 2017-12-14
13000 Tor 0.3.2.7-rc fixes various bugs in earlier versions of Tor,
13001 including some that could affect reliability or correctness.
13003 This is the first release candidate in the 0.3.2 series. If we find no
13004 new bugs or regression here, then the first stable 0.3.2. release will
13005 be nearly identical to this.
13007 o Major bugfixes (circuit prediction):
13008 - Fix circuit prediction logic so that a client doesn't treat a port
13009 as being "handled" by a circuit if that circuit already has
13010 isolation settings on it. This change should make Tor clients more
13011 responsive by improving their chances of having a pre-created
13012 circuit ready for use when a request arrives. Fixes bug 18859;
13013 bugfix on 0.2.3.3-alpha.
13015 o Minor features (logging):
13016 - Provide better warnings when the getrandom() syscall fails. Closes
13019 o Minor features (portability):
13020 - Tor now compiles correctly on arm64 with libseccomp-dev installed.
13021 (It doesn't yet work with the sandbox enabled.) Closes
13024 o Minor bugfixes (bridge clients, bootstrap):
13025 - Retry directory downloads when we get our first bridge descriptor
13026 during bootstrap or while reconnecting to the network. Keep
13027 retrying every time we get a bridge descriptor, until we have a
13028 reachable bridge. Fixes part of bug 24367; bugfix on 0.2.0.3-alpha.
13029 - Stop delaying bridge descriptor fetches when we have cached bridge
13030 descriptors. Instead, only delay bridge descriptor fetches when we
13031 have at least one reachable bridge. Fixes part of bug 24367;
13032 bugfix on 0.2.0.3-alpha.
13033 - Stop delaying directory fetches when we have cached bridge
13034 descriptors. Instead, only delay bridge descriptor fetches when
13035 all our bridges are definitely unreachable. Fixes part of bug
13036 24367; bugfix on 0.2.0.3-alpha.
13038 o Minor bugfixes (compilation):
13039 - Fix a signed/unsigned comparison warning introduced by our fix to
13040 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
13042 o Minor bugfixes (correctness):
13043 - Fix several places in our codebase where a C compiler would be
13044 likely to eliminate a check, based on assuming that undefined
13045 behavior had not happened elsewhere in the code. These cases are
13046 usually a sign of redundant checking or dubious arithmetic. Found
13047 by Georg Koppen using the "STACK" tool from Wang, Zeldovich,
13048 Kaashoek, and Solar-Lezama. Fixes bug 24423; bugfix on various
13051 o Minor bugfixes (onion service v3):
13052 - Fix a race where an onion service would launch a new intro circuit
13053 after closing an old one, but fail to register it before freeing
13054 the previously closed circuit. This bug was making the service
13055 unable to find the established intro circuit and thus not upload
13056 its descriptor, thus making a service unavailable for up to 24
13057 hours. Fixes bug 23603; bugfix on 0.3.2.1-alpha.
13059 o Minor bugfixes (scheduler, KIST):
13060 - Properly set the scheduler state of an unopened channel in the
13061 KIST scheduler main loop. This prevents a harmless but annoying
13062 log warning. Fixes bug 24502; bugfix on 0.3.2.4-alpha.
13063 - Avoid a possible integer overflow when computing the available
13064 space on the TCP buffer of a channel. This had no security
13065 implications; but could make KIST allow too many cells on a
13066 saturated connection. Fixes bug 24590; bugfix on 0.3.2.1-alpha.
13067 - Downgrade to "info" a harmless warning about the monotonic time
13068 moving backwards: This can happen on platform not supporting
13069 monotonic time. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
13072 Changes in version 0.3.2.6-alpha - 2017-12-01
13073 This version of Tor is the latest in the 0.3.2 alpha series. It
13074 includes fixes for several important security issues. All Tor users
13075 should upgrade to this release, or to one of the other releases coming
13078 o Major bugfixes (security):
13079 - Fix a denial of service bug where an attacker could use a
13080 malformed directory object to cause a Tor instance to pause while
13081 OpenSSL would try to read a passphrase from the terminal. (Tor
13082 instances run without a terminal, which is the case for most Tor
13083 packages, are not impacted.) Fixes bug 24246; bugfix on every
13084 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13085 Found by OSS-Fuzz as testcase 6360145429790720.
13086 - Fix a denial of service issue where an attacker could crash a
13087 directory authority using a malformed router descriptor. Fixes bug
13088 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13090 - When checking for replays in the INTRODUCE1 cell data for a
13091 (legacy) onion service, correctly detect replays in the RSA-
13092 encrypted part of the cell. We were previously checking for
13093 replays on the entire cell, but those can be circumvented due to
13094 the malleability of Tor's legacy hybrid encryption. This fix helps
13095 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13096 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13099 o Major bugfixes (security, onion service v2):
13100 - Fix a use-after-free error that could crash v2 Tor onion services
13101 when they failed to open circuits while expiring introduction
13102 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13103 also tracked as TROVE-2017-013 and CVE-2017-8823.
13105 o Major bugfixes (security, relay):
13106 - When running as a relay, make sure that we never build a path
13107 through ourselves, even in the case where we have somehow lost the
13108 version of our descriptor appearing in the consensus. Fixes part
13109 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13110 as TROVE-2017-012 and CVE-2017-8822.
13111 - When running as a relay, make sure that we never choose ourselves
13112 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
13113 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
13115 o Minor feature (relay statistics):
13116 - Change relay bandwidth reporting stats interval from 4 hours to 24
13117 hours in order to reduce the efficiency of guard discovery
13118 attacks. Fixes ticket 23856.
13120 o Minor features (directory authority):
13121 - Add an IPv6 address for the "bastet" directory authority. Closes
13124 o Minor bugfixes (client):
13125 - By default, do not enable storage of client-side DNS values. These
13126 values were unused by default previously, but they should not have
13127 been cached at all. Fixes bug 24050; bugfix on 0.2.6.3-alpha.
13130 Changes in version 0.3.1.9 - 2017-12-01:
13131 Tor 0.3.1.9 backports important security and stability fixes from the
13132 0.3.2 development series. All Tor users should upgrade to this
13133 release, or to another of the releases coming out today.
13135 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13136 - Fix a denial of service bug where an attacker could use a
13137 malformed directory object to cause a Tor instance to pause while
13138 OpenSSL would try to read a passphrase from the terminal. (Tor
13139 instances run without a terminal, which is the case for most Tor
13140 packages, are not impacted.) Fixes bug 24246; bugfix on every
13141 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13142 Found by OSS-Fuzz as testcase 6360145429790720.
13143 - Fix a denial of service issue where an attacker could crash a
13144 directory authority using a malformed router descriptor. Fixes bug
13145 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13147 - When checking for replays in the INTRODUCE1 cell data for a
13148 (legacy) onion service, correctly detect replays in the RSA-
13149 encrypted part of the cell. We were previously checking for
13150 replays on the entire cell, but those can be circumvented due to
13151 the malleability of Tor's legacy hybrid encryption. This fix helps
13152 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13153 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13156 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13157 - Fix a use-after-free error that could crash v2 Tor onion services
13158 when they failed to open circuits while expiring introduction
13159 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13160 also tracked as TROVE-2017-013 and CVE-2017-8823.
13162 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13163 - When running as a relay, make sure that we never build a path
13164 through ourselves, even in the case where we have somehow lost the
13165 version of our descriptor appearing in the consensus. Fixes part
13166 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13167 as TROVE-2017-012 and CVE-2017-8822.
13168 - When running as a relay, make sure that we never choose ourselves
13169 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
13170 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
13172 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
13173 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13174 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13175 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13176 identifying and finding a workaround to this bug and to Moritz,
13177 Arthur Edelstein, and Roger for helping to track it down and
13180 o Minor features (bridge):
13181 - Bridges now include notice in their descriptors that they are
13182 bridges, and notice of their distribution status, based on their
13183 publication settings. Implements ticket 18329. For more fine-
13184 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13187 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13188 - Add an IPv6 address for the "bastet" directory authority. Closes
13191 o Minor features (geoip):
13192 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13195 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
13196 - Avoid unnecessary calls to directory_fetches_from_authorities() on
13197 relays, to prevent spurious address resolutions and descriptor
13198 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13199 bugfix on in 0.2.8.1-alpha.
13201 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
13202 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
13203 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13205 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
13206 - When a circuit is marked for close, do not attempt to package any
13207 cells for channels on that circuit. Previously, we would detect
13208 this condition lower in the call stack, when we noticed that the
13209 circuit had no attached channel, and log an annoying message.
13210 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13212 o Minor bugfixes (onion service, backport from 0.3.2.5-alpha):
13213 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
13214 so it matches dir-spec.txt. Fixes bug 24262; bugfix
13217 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
13218 - Avoid a crash when transitioning from client mode to bridge mode.
13219 Previously, we would launch the worker threads whenever our
13220 "public server" mode changed, but not when our "server" mode
13221 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13224 Changes in version 0.3.0.13 - 2017-12-01
13225 Tor 0.3.0.13 backports important security and stability bugfixes from
13226 later Tor releases. All Tor users should upgrade to this release, or
13227 to another of the releases coming out today.
13229 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
13230 2018. If you need a release with long-term support, please stick with
13231 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13233 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13234 - Fix a denial of service bug where an attacker could use a
13235 malformed directory object to cause a Tor instance to pause while
13236 OpenSSL would try to read a passphrase from the terminal. (Tor
13237 instances run without a terminal, which is the case for most Tor
13238 packages, are not impacted.) Fixes bug 24246; bugfix on every
13239 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13240 Found by OSS-Fuzz as testcase 6360145429790720.
13241 - Fix a denial of service issue where an attacker could crash a
13242 directory authority using a malformed router descriptor. Fixes bug
13243 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13245 - When checking for replays in the INTRODUCE1 cell data for a
13246 (legacy) onion service, correctly detect replays in the RSA-
13247 encrypted part of the cell. We were previously checking for
13248 replays on the entire cell, but those can be circumvented due to
13249 the malleability of Tor's legacy hybrid encryption. This fix helps
13250 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13251 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13254 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13255 - Fix a use-after-free error that could crash v2 Tor onion services
13256 when they failed to open circuits while expiring introduction
13257 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13258 also tracked as TROVE-2017-013 and CVE-2017-8823.
13260 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13261 - When running as a relay, make sure that we never build a path
13262 through ourselves, even in the case where we have somehow lost the
13263 version of our descriptor appearing in the consensus. Fixes part
13264 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13265 as TROVE-2017-012 and CVE-2017-8822.
13266 - When running as a relay, make sure that we never choose ourselves
13267 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
13268 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
13270 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
13271 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13272 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13273 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13274 identifying and finding a workaround to this bug and to Moritz,
13275 Arthur Edelstein, and Roger for helping to track it down and
13278 o Minor features (security, windows, backport from 0.3.1.1-alpha):
13279 - Enable a couple of pieces of Windows hardening: one
13280 (HeapEnableTerminationOnCorruption) that has been on-by-default
13281 since Windows 8, and unavailable before Windows 7; and one
13282 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
13283 affect us, but shouldn't do any harm. Closes ticket 21953.
13285 o Minor features (bridge, backport from 0.3.1.9):
13286 - Bridges now include notice in their descriptors that they are
13287 bridges, and notice of their distribution status, based on their
13288 publication settings. Implements ticket 18329. For more fine-
13289 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13292 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13293 - Add an IPv6 address for the "bastet" directory authority. Closes
13296 o Minor features (geoip):
13297 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13300 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
13301 - Avoid unnecessary calls to directory_fetches_from_authorities() on
13302 relays, to prevent spurious address resolutions and descriptor
13303 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13304 bugfix on in 0.2.8.1-alpha.
13306 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
13307 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
13308 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13310 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
13311 - When a circuit is marked for close, do not attempt to package any
13312 cells for channels on that circuit. Previously, we would detect
13313 this condition lower in the call stack, when we noticed that the
13314 circuit had no attached channel, and log an annoying message.
13315 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13317 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
13318 - Avoid a crash when transitioning from client mode to bridge mode.
13319 Previously, we would launch the worker threads whenever our
13320 "public server" mode changed, but not when our "server" mode
13321 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13323 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
13324 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13325 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13328 Changes in version 0.2.9.14 - 2017-12-01
13329 Tor 0.3.0.13 backports important security and stability bugfixes from
13330 later Tor releases. All Tor users should upgrade to this release, or
13331 to another of the releases coming out today.
13333 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
13334 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13335 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13336 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13337 identifying and finding a workaround to this bug and to Moritz,
13338 Arthur Edelstein, and Roger for helping to track it down and
13341 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13342 - Fix a denial of service bug where an attacker could use a
13343 malformed directory object to cause a Tor instance to pause while
13344 OpenSSL would try to read a passphrase from the terminal. (Tor
13345 instances run without a terminal, which is the case for most Tor
13346 packages, are not impacted.) Fixes bug 24246; bugfix on every
13347 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13348 Found by OSS-Fuzz as testcase 6360145429790720.
13349 - Fix a denial of service issue where an attacker could crash a
13350 directory authority using a malformed router descriptor. Fixes bug
13351 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13353 - When checking for replays in the INTRODUCE1 cell data for a
13354 (legacy) onion service, correctly detect replays in the RSA-
13355 encrypted part of the cell. We were previously checking for
13356 replays on the entire cell, but those can be circumvented due to
13357 the malleability of Tor's legacy hybrid encryption. This fix helps
13358 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13359 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13362 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13363 - Fix a use-after-free error that could crash v2 Tor onion services
13364 when they failed to open circuits while expiring introduction
13365 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13366 also tracked as TROVE-2017-013 and CVE-2017-8823.
13368 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13369 - When running as a relay, make sure that we never build a path
13370 through ourselves, even in the case where we have somehow lost the
13371 version of our descriptor appearing in the consensus. Fixes part
13372 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13373 as TROVE-2017-012 and CVE-2017-8822.
13375 o Minor features (bridge, backport from 0.3.1.9):
13376 - Bridges now include notice in their descriptors that they are
13377 bridges, and notice of their distribution status, based on their
13378 publication settings. Implements ticket 18329. For more fine-
13379 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13382 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13383 - Add an IPv6 address for the "bastet" directory authority. Closes
13386 o Minor features (geoip):
13387 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13390 o Minor features (security, windows, backport from 0.3.1.1-alpha):
13391 - Enable a couple of pieces of Windows hardening: one
13392 (HeapEnableTerminationOnCorruption) that has been on-by-default
13393 since Windows 8, and unavailable before Windows 7; and one
13394 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
13395 affect us, but shouldn't do any harm. Closes ticket 21953.
13397 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
13398 - Avoid unnecessary calls to directory_fetches_from_authorities() on
13399 relays, to prevent spurious address resolutions and descriptor
13400 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13401 bugfix on in 0.2.8.1-alpha.
13403 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
13404 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
13405 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13407 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
13408 - When a circuit is marked for close, do not attempt to package any
13409 cells for channels on that circuit. Previously, we would detect
13410 this condition lower in the call stack, when we noticed that the
13411 circuit had no attached channel, and log an annoying message.
13412 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13414 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
13415 - Avoid a crash when transitioning from client mode to bridge mode.
13416 Previously, we would launch the worker threads whenever our
13417 "public server" mode changed, but not when our "server" mode
13418 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13420 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
13421 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13422 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13425 Changes in version 0.2.8.17 - 2017-12-01
13426 Tor 0.2.8.17 backports important security and stability bugfixes from
13427 later Tor releases. All Tor users should upgrade to this release, or
13428 to another of the releases coming out today.
13430 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
13431 2018. If you need a release with long-term support, please upgrade with
13432 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13434 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13435 - Fix a denial of service bug where an attacker could use a
13436 malformed directory object to cause a Tor instance to pause while
13437 OpenSSL would try to read a passphrase from the terminal. (Tor
13438 instances run without a terminal, which is the case for most Tor
13439 packages, are not impacted.) Fixes bug 24246; bugfix on every
13440 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13441 Found by OSS-Fuzz as testcase 6360145429790720.
13442 - When checking for replays in the INTRODUCE1 cell data for a
13443 (legacy) onion service, correctly detect replays in the RSA-
13444 encrypted part of the cell. We were previously checking for
13445 replays on the entire cell, but those can be circumvented due to
13446 the malleability of Tor's legacy hybrid encryption. This fix helps
13447 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13448 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13451 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13452 - Fix a use-after-free error that could crash v2 Tor onion services
13453 when they failed to open circuits while expiring introduction
13454 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13455 also tracked as TROVE-2017-013 and CVE-2017-8823.
13457 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13458 - When running as a relay, make sure that we never build a path through
13459 ourselves, even in the case where we have somehow lost the version of
13460 our descriptor appearing in the consensus. Fixes part of bug 21534;
13461 bugfix on 0.2.0.1-alpha. This issue is also tracked as TROVE-2017-012
13464 o Minor features (bridge, backport from 0.3.1.9):
13465 - Bridges now include notice in their descriptors that they are
13466 bridges, and notice of their distribution status, based on their
13467 publication settings. Implements ticket 18329. For more fine-
13468 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13471 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13472 - Add an IPv6 address for the "bastet" directory authority. Closes
13475 o Minor features (geoip):
13476 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
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 0.2.5.16 - 2017-12-01
13485 Tor 0.2.5.13 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 0.2.5 series will no longer be supported after 1 May
13490 2018. If you need a release with long-term support, please upgrade to
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, relay, backport from 0.3.2.6-alpha):
13511 - When running as a relay, make sure that we never build a path
13512 through ourselves, even in the case where we have somehow lost the
13513 version of our descriptor appearing in the consensus. Fixes part
13514 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13515 as TROVE-2017-012 and CVE-2017-8822.
13517 o Minor features (bridge, backport from 0.3.1.9):
13518 - Bridges now include notice in their descriptors that they are
13519 bridges, and notice of their distribution status, based on their
13520 publication settings. Implements ticket 18329. For more fine-
13521 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13524 o Minor features (geoip):
13525 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13529 Changes in version 0.3.2.5-alpha - 2017-11-22
13530 Tor 0.3.2.5-alpha is the fifth alpha release in the 0.3.2.x series. It
13531 fixes several stability and reliability bugs, including a fix for
13532 intermittent bootstrapping failures that some people have been seeing
13533 since the 0.3.0.x series.
13535 Please test this alpha out -- many of these fixes will soon be
13536 backported to stable Tor versions if no additional bugs are found
13539 o Major bugfixes (bootstrapping):
13540 - Fetch descriptors aggressively whenever we lack enough to build
13541 circuits, regardless of how many descriptors we are missing.
13542 Previously, we would delay launching the fetch when we had fewer
13543 than 15 missing descriptors, even if some of those descriptors
13544 were blocking circuits from building. Fixes bug 23985; bugfix on
13545 0.1.1.11-alpha. The effects of this bug became worse in
13546 0.3.0.3-alpha, when we began treating missing descriptors from our
13547 primary guards as a reason to delay circuits.
13548 - Don't try fetching microdescriptors from relays that have failed
13549 to deliver them in the past. Fixes bug 23817; bugfix
13552 o Minor features (directory authority):
13553 - Make the "Exit" flag assignment only depend on whether the exit
13554 policy allows connections to ports 80 and 443. Previously relays
13555 would get the Exit flag if they allowed connections to one of
13556 these ports and also port 6667. Resolves ticket 23637.
13558 o Minor features (geoip):
13559 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13562 o Minor features (linux seccomp2 sandbox):
13563 - Update the sandbox rules so that they should now work correctly
13564 with Glibc 2.26. Closes ticket 24315.
13566 o Minor features (logging):
13567 - Downgrade a pair of log messages that could occur when an exit's
13568 resolver gave us an unusual (but not forbidden) response. Closes
13570 - Improve the message we log when re-enabling circuit build timeouts
13571 after having received a consensus. Closes ticket 20963.
13573 o Minor bugfixes (compilation):
13574 - Fix a memory leak warning in one of the libevent-related
13575 configuration tests that could occur when manually specifying
13576 -fsanitize=address. Fixes bug 24279; bugfix on 0.3.0.2-alpha.
13577 Found and patched by Alex Xu.
13578 - When detecting OpenSSL on Windows from our configure script, make
13579 sure to try linking with the ws2_32 library. Fixes bug 23783;
13580 bugfix on 0.3.2.2-alpha.
13582 o Minor bugfixes (control port, linux seccomp2 sandbox):
13583 - Avoid a crash when attempting to use the seccomp2 sandbox together
13584 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
13587 o Minor bugfixes (control port, onion services):
13588 - Report "FAILED" instead of "UPLOAD_FAILED" "FAILED" for the
13589 HS_DESC event when a service is not able to upload a descriptor.
13590 Fixes bug 24230; bugfix on 0.2.7.1-alpha.
13592 o Minor bugfixes (directory cache):
13593 - Recover better from empty or corrupt files in the consensus cache
13594 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
13595 - When a consensus diff calculation is only partially successful,
13596 only record the successful parts as having succeeded. Partial
13597 success can happen if (for example) one compression method fails
13598 but the others succeed. Previously we misrecorded all the
13599 calculations as having succeeded, which would later cause a
13600 nonfatal assertion failure. Fixes bug 24086; bugfix
13603 o Minor bugfixes (logging):
13604 - Only log once if we notice that KIST support is gone. Fixes bug
13605 24158; bugfix on 0.3.2.1-alpha.
13606 - Suppress a log notice when relay descriptors arrive. We already
13607 have a bootstrap progress for this so no need to log notice
13608 everytime tor receives relay descriptors. Microdescriptors behave
13609 the same. Fixes bug 23861; bugfix on 0.2.8.2-alpha.
13611 o Minor bugfixes (network layer):
13612 - When closing a connection via close_connection_immediately(), we
13613 mark it as "not blocked on bandwidth", to prevent later calls from
13614 trying to unblock it, and give it permission to read. This fixes a
13615 backtrace warning that can happen on relays under various
13616 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
13618 o Minor bugfixes (onion services):
13619 - The introduction circuit was being timed out too quickly while
13620 waiting for the rendezvous circuit to complete. Keep the intro
13621 circuit around longer instead of timing out and reopening new ones
13622 constantly. Fixes bug 23681; bugfix on 0.2.4.8-alpha.
13623 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
13624 so it matches dir-spec.txt. Fixes bug 24262; bugfix
13626 - Silence a warning about failed v3 onion descriptor uploads that
13627 can happen naturally under certain edge cases. Fixes part of bug
13628 23662; bugfix on 0.3.2.1-alpha.
13630 o Minor bugfixes (tests):
13631 - Fix a memory leak in one of the bridge-distribution test cases.
13632 Fixes bug 24345; bugfix on 0.3.2.3-alpha.
13633 - Fix a bug in our fuzzing mock replacement for crypto_pk_checksig(),
13634 to correctly handle cases where a caller gives it an RSA key of
13635 under 160 bits. (This is not actually a bug in Tor itself, but
13636 rather in our fuzzing code.) Fixes bug 24247; bugfix on
13637 0.3.0.3-alpha. Found by OSS-Fuzz as issue 4177.
13640 - Add notes in man page regarding OS support for the various
13641 scheduler types. Attempt to use less jargon in the scheduler
13642 section. Closes ticket 24254.
13645 Changes in version 0.3.2.4-alpha - 2017-11-08
13646 Tor 0.3.2.4-alpha is the fourth alpha release in the 0.3.2.x series.
13647 It fixes several stability and reliability bugs, especially including
13648 a major reliability issue that has been plaguing fast exit relays in
13651 o Major bugfixes (exit relays, DNS):
13652 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13653 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13654 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13655 identifying and finding a workaround to this bug and to Moritz,
13656 Arthur Edelstein, and Roger for helping to track it down and
13659 o Major bugfixes (scheduler, channel):
13660 - Stop processing scheduled channels if they closed while flushing
13661 cells. This can happen if the write on the connection fails
13662 leading to the channel being closed while in the scheduler loop.
13663 Fixes bug 23751; bugfix on 0.3.2.1-alpha.
13665 o Minor features (logging, scheduler):
13666 - Introduce a SCHED_BUG() function to log extra information about
13667 the scheduler state if we ever catch a bug in the scheduler.
13668 Closes ticket 23753.
13670 o Minor features (removed deprecations):
13671 - The ClientDNSRejectInternalAddresses flag can once again be set in
13672 non-testing Tor networks, so long as they do not use the default
13673 directory authorities. This change also removes the deprecation of
13674 this flag from 0.2.9.2-alpha. Closes ticket 21031.
13676 o Minor features (testing):
13677 - Our fuzzing tests now test the encrypted portions of v3 onion
13678 service descriptors. Implements more of 21509.
13680 o Minor bugfixes (directory client):
13681 - On failure to download directory information, delay retry attempts
13682 by a random amount based on the "decorrelated jitter" algorithm.
13683 Our previous delay algorithm tended to produce extra-long delays
13684 too easily. Fixes bug 23816; bugfix on 0.2.9.1-alpha.
13686 o Minor bugfixes (IPv6, v3 single onion services):
13687 - Remove buggy code for IPv6-only v3 single onion services, and
13688 reject attempts to configure them. This release supports IPv4,
13689 dual-stack, and IPv6-only v3 onion services; and IPv4 and dual-
13690 stack v3 single onion services. Fixes bug 23820; bugfix
13693 o Minor bugfixes (logging, relay):
13694 - Give only a protocol warning when the ed25519 key is not
13695 consistent between the descriptor and microdescriptor of a relay.
13696 This can happen, for instance, if the relay has been flagged
13697 NoEdConsensus. Fixes bug 24025; bugfix on 0.3.2.1-alpha.
13699 o Minor bugfixes (manpage, onion service):
13700 - Document that the HiddenServiceNumIntroductionPoints option is
13701 0-10 for v2 services and 0-20 for v3 services. Fixes bug 24115;
13702 bugfix on 0.3.2.1-alpha.
13704 o Minor bugfixes (memory leaks):
13705 - Fix a minor memory leak at exit in the KIST scheduler. This bug
13706 should have no user-visible impact. Fixes bug 23774; bugfix
13708 - Fix a memory leak when decrypting a badly formatted v3 onion
13709 service descriptor. Fixes bug 24150; bugfix on 0.3.2.1-alpha.
13710 Found by OSS-Fuzz; this is OSS-Fuzz issue 3994.
13712 o Minor bugfixes (onion services):
13713 - Cache some needed onion service client information instead of
13714 constantly computing it over and over again. Fixes bug 23623;
13715 bugfix on 0.3.2.1-alpha.
13716 - Properly retry HSv3 descriptor fetches when missing required
13717 directory information. Fixes bug 23762; bugfix on 0.3.2.1-alpha.
13719 o Minor bugfixes (path selection):
13720 - When selecting relays by bandwidth, avoid a rounding error that
13721 could sometimes cause load to be imbalanced incorrectly.
13722 Previously, we would always round upwards; now, we round towards
13723 the nearest integer. This had the biggest effect when a relay's
13724 weight adjustments should have given it weight 0, but it got
13725 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
13726 - When calculating the fraction of nodes that have descriptors, and
13727 all nodes in the network have zero bandwidths, count the number of
13728 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
13729 - Actually log the total bandwidth in compute_weighted_bandwidths().
13730 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
13732 o Minor bugfixes (relay, crash):
13733 - Avoid a crash when transitioning from client mode to bridge mode.
13734 Previously, we would launch the worker threads whenever our
13735 "public server" mode changed, but not when our "server" mode
13736 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13738 o Minor bugfixes (testing):
13739 - Fix a spurious fuzzing-only use of an uninitialized value. Found
13740 by Brian Carpenter. Fixes bug 24082; bugfix on 0.3.0.3-alpha.
13741 - Test that IPv6-only clients can use microdescriptors when running
13742 "make test-network-all". Requires chutney master 61c28b9 or later.
13743 Closes ticket 24109.
13746 Changes in version 0.3.2.3-alpha - 2017-10-27
13747 Tor 0.3.2.3-alpha is the third release in the 0.3.2 series. It fixes
13748 numerous small bugs in earlier versions of 0.3.2.x, and adds a new
13749 directory authority, Bastet.
13751 o Directory authority changes:
13752 - Add "Bastet" as a ninth directory authority to the default list.
13753 Closes ticket 23910.
13754 - The directory authority "Longclaw" has changed its IP address.
13755 Closes ticket 23592.
13757 o Minor features (bridge):
13758 - Bridge relays can now set the BridgeDistribution config option to
13759 add a "bridge-distribution-request" line to their bridge
13760 descriptor, which tells BridgeDB how they'd like their bridge
13761 address to be given out. (Note that as of Oct 2017, BridgeDB does
13762 not yet implement this feature.) As a side benefit, this feature
13763 provides a way to distinguish bridge descriptors from non-bridge
13764 descriptors. Implements tickets 18329.
13766 o Minor features (client, entry guards):
13767 - Improve log messages when missing descriptors for primary guards.
13768 Resolves ticket 23670.
13770 o Minor features (geoip):
13771 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13774 o Minor bugfixes (bridge):
13775 - Overwrite the bridge address earlier in the process of retrieving
13776 its descriptor, to make sure we reach it on the configured
13777 address. Fixes bug 20532; bugfix on 0.2.0.10-alpha.
13779 o Minor bugfixes (documentation):
13780 - Document better how to read gcov, and what our gcov postprocessing
13781 scripts do. Fixes bug 23739; bugfix on 0.2.9.1-alpha.
13783 o Minor bugfixes (entry guards):
13784 - Tor now updates its guard state when it reads a consensus
13785 regardless of whether it's missing descriptors. That makes tor use
13786 its primary guards to fetch descriptors in some edge cases where
13787 it would previously have used fallback directories. Fixes bug
13788 23862; bugfix on 0.3.0.1-alpha.
13790 o Minor bugfixes (hidden service client):
13791 - When handling multiple SOCKS request for the same .onion address,
13792 only fetch the service descriptor once.
13793 - When a descriptor fetch fails with a non-recoverable error, close
13794 all pending SOCKS requests for that .onion. Fixes bug 23653;
13795 bugfix on 0.3.2.1-alpha.
13797 o Minor bugfixes (hidden service):
13798 - Always regenerate missing hidden service public key files. Prior
13799 to this, if the public key was deleted from disk, it wouldn't get
13800 recreated. Fixes bug 23748; bugfix on 0.3.2.2-alpha. Patch
13802 - Make sure that we have a usable ed25519 key when the intro point
13803 relay supports ed25519 link authentication. Fixes bug 24002;
13804 bugfix on 0.3.2.1-alpha.
13806 o Minor bugfixes (hidden service, v2):
13807 - When reloading configured hidden services, copy all information
13808 from the old service object. Previously, some data was omitted,
13809 causing delays in descriptor upload, and other bugs. Fixes bug
13810 23790; bugfix on 0.2.1.9-alpha.
13812 o Minor bugfixes (memory safety, defensive programming):
13813 - Clear the target address when node_get_prim_orport() returns
13814 early. Fixes bug 23874; bugfix on 0.2.8.2-alpha.
13816 o Minor bugfixes (relay):
13817 - Avoid a BUG warning when receiving a dubious CREATE cell while an
13818 option transition is in progress. Fixes bug 23952; bugfix
13821 o Minor bugfixes (testing):
13822 - Adjust the GitLab CI configuration to more closely match that of
13823 Travis CI. Fixes bug 23757; bugfix on 0.3.2.2-alpha.
13824 - Prevent scripts/test/coverage from attempting to move gcov output
13825 to the root directory. Fixes bug 23741; bugfix on 0.2.5.1-alpha.
13826 - When running unit tests as root, skip a test that would fail
13827 because it expects a permissions error. This affects some
13828 continuous integration setups. Fixes bug 23758; bugfix
13830 - Stop unconditionally mirroring the tor repository in GitLab CI.
13831 This prevented developers from enabling GitLab CI on master. Fixes
13832 bug 23755; bugfix on 0.3.2.2-alpha.
13833 - Fix the hidden service v3 descriptor decoding fuzzing to use the
13834 latest decoding API correctly. Fixes bug 21509; bugfix
13837 o Minor bugfixes (warnings):
13838 - When we get an HTTP request on a SOCKS port, tell the user about
13839 the new HTTPTunnelPort option. Previously, we would give a "Tor is
13840 not an HTTP Proxy" message, which stopped being true when
13841 HTTPTunnelPort was introduced. Fixes bug 23678; bugfix
13845 Changes in version 0.2.5.15 - 2017-10-25
13846 Tor 0.2.5.15 backports a collection of bugfixes from later Tor release
13847 series. It also adds a new directory authority, Bastet.
13849 Note: the Tor 0.2.5 series will no longer be supported after 1 May
13850 2018. If you need a release with long-term support, please upgrade to
13851 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13853 o Directory authority changes:
13854 - Add "Bastet" as a ninth directory authority to the default list.
13855 Closes ticket 23910.
13856 - The directory authority "Longclaw" has changed its IP address.
13857 Closes ticket 23592.
13859 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
13860 - Avoid an assertion failure bug affecting our implementation of
13861 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
13862 handling of "0xx" differs from what we had expected. Fixes bug
13863 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
13865 o Minor features (geoip):
13866 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13869 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
13870 - Fix a memset() off the end of an array when packing cells. This
13871 bug should be harmless in practice, since the corrupted bytes are
13872 still in the same structure, and are always padding bytes,
13873 ignored, or immediately overwritten, depending on compiler
13874 behavior. Nevertheless, because the memset()'s purpose is to make
13875 sure that any other cell-handling bugs can't expose bytes to the
13876 network, we need to fix it. Fixes bug 22737; bugfix on
13877 0.2.4.11-alpha. Fixes CID 1401591.
13879 o Build features (backport from 0.3.1.5-alpha):
13880 - Tor's repository now includes a Travis Continuous Integration (CI)
13881 configuration file (.travis.yml). This is meant to help new
13882 developers and contributors who fork Tor to a Github repository be
13883 better able to test their changes, and understand what we expect
13884 to pass. To use this new build feature, you must fork Tor to your
13885 Github account, then go into the "Integrations" menu in the
13886 repository settings for your fork and enable Travis, then push
13887 your changes. Closes ticket 22636.
13890 Changes in version 0.2.8.16 - 2017-10-25
13891 Tor 0.2.8.16 backports a collection of bugfixes from later Tor release
13892 series, including a bugfix for a crash issue that had affected relays
13893 under memory pressure. It also adds a new directory authority, Bastet.
13895 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
13896 2018. If you need a release with long-term support, please stick with
13897 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13899 o Directory authority changes:
13900 - Add "Bastet" as a ninth directory authority to the default list.
13901 Closes ticket 23910.
13902 - The directory authority "Longclaw" has changed its IP address.
13903 Closes ticket 23592.
13905 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13906 - Fix a timing-based assertion failure that could occur when the
13907 circuit out-of-memory handler freed a connection's output buffer.
13908 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13910 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13911 - Remove longclaw's IPv6 address, as it will soon change. Authority
13912 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13913 3/8 directory authorities with IPv6 addresses, but there are also
13914 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13916 o Minor features (geoip):
13917 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13921 Changes in version 0.2.9.13 - 2017-10-25
13922 Tor 0.2.9.13 backports a collection of bugfixes from later Tor release
13923 series, including a bugfix for a crash issue that had affected relays
13924 under memory pressure. It also adds a new directory authority, Bastet.
13926 o Directory authority changes:
13927 - Add "Bastet" as a ninth directory authority to the default list.
13928 Closes ticket 23910.
13929 - The directory authority "Longclaw" has changed its IP address.
13930 Closes ticket 23592.
13932 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13933 - Fix a timing-based assertion failure that could occur when the
13934 circuit out-of-memory handler freed a connection's output buffer.
13935 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13937 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13938 - Remove longclaw's IPv6 address, as it will soon change. Authority
13939 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13940 3/8 directory authorities with IPv6 addresses, but there are also
13941 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13943 o Minor features (geoip):
13944 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13947 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
13948 - When a directory authority rejects a descriptor or extrainfo with
13949 a given digest, mark that digest as undownloadable, so that we do
13950 not attempt to download it again over and over. We previously
13951 tried to avoid downloading such descriptors by other means, but we
13952 didn't notice if we accidentally downloaded one anyway. This
13953 behavior became problematic in 0.2.7.2-alpha, when authorities
13954 began pinning Ed25519 keys. Fixes bug 22349; bugfix
13957 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
13958 - Clear the address when node_get_prim_orport() returns early.
13959 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
13961 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
13962 - When running as a Windows service, set the ID of the main thread
13963 correctly. Failure to do so made us fail to send log messages to
13964 the controller in 0.2.1.16-rc, slowed down controller event
13965 delivery in 0.2.7.3-rc and later, and crash with an assertion
13966 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
13967 Patch and diagnosis from "Vort".
13970 Changes in version 0.3.0.12 - 2017-10-25
13971 Tor 0.3.0.12 backports a collection of bugfixes from later Tor release
13972 series, including a bugfix for a crash issue that had affected relays
13973 under memory pressure. It also adds a new directory authority, Bastet.
13975 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
13976 2018. If you need a release with long-term support, please stick with
13977 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13979 o Directory authority changes:
13980 - Add "Bastet" as a ninth directory authority to the default list.
13981 Closes ticket 23910.
13982 - The directory authority "Longclaw" has changed its IP address.
13983 Closes ticket 23592.
13985 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13986 - Fix a timing-based assertion failure that could occur when the
13987 circuit out-of-memory handler freed a connection's output buffer.
13988 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13990 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13991 - Remove longclaw's IPv6 address, as it will soon change. Authority
13992 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13993 3/8 directory authorities with IPv6 addresses, but there are also
13994 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13996 o Minor features (geoip):
13997 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
14000 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
14001 - When a directory authority rejects a descriptor or extrainfo with
14002 a given digest, mark that digest as undownloadable, so that we do
14003 not attempt to download it again over and over. We previously
14004 tried to avoid downloading such descriptors by other means, but we
14005 didn't notice if we accidentally downloaded one anyway. This
14006 behavior became problematic in 0.2.7.2-alpha, when authorities
14007 began pinning Ed25519 keys. Fixes bug 22349; bugfix
14010 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
14011 - Avoid a possible double close of a circuit by the intro point on
14012 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
14013 bugfix on 0.3.0.1-alpha.
14015 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
14016 - Clear the address when node_get_prim_orport() returns early.
14017 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
14019 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
14020 - When running as a Windows service, set the ID of the main thread
14021 correctly. Failure to do so made us fail to send log messages to
14022 the controller in 0.2.1.16-rc, slowed down controller event
14023 delivery in 0.2.7.3-rc and later, and crash with an assertion
14024 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
14025 Patch and diagnosis from "Vort".
14028 Changes in version 0.3.1.8 - 2017-10-25
14029 Tor 0.3.1.8 is the second stable release in the 0.3.1 series.
14030 It includes several bugfixes, including a bugfix for a crash issue
14031 that had affected relays under memory pressure. It also adds
14032 a new directory authority, Bastet.
14034 o Directory authority changes:
14035 - Add "Bastet" as a ninth directory authority to the default list.
14036 Closes ticket 23910.
14037 - The directory authority "Longclaw" has changed its IP address.
14038 Closes ticket 23592.
14040 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
14041 - Fix a timing-based assertion failure that could occur when the
14042 circuit out-of-memory handler freed a connection's output buffer.
14043 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
14045 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
14046 - Remove longclaw's IPv6 address, as it will soon change. Authority
14047 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
14048 3/8 directory authorities with IPv6 addresses, but there are also
14049 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
14051 o Minor features (geoip):
14052 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
14055 o Minor bugfixes (compilation, backport from 0.3.2.2-alpha):
14056 - Fix a compilation warning when building with zstd support on
14057 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
14058 and fixed by Andreas Stieger.
14060 o Minor bugfixes (compression, backport from 0.3.2.2-alpha):
14061 - Handle a pathological case when decompressing Zstandard data when
14062 the output buffer size is zero. Fixes bug 23551; bugfix
14065 o Minor bugfixes (directory authority, backport from 0.3.2.1-alpha):
14066 - Remove the length limit on HTTP status lines that authorities can
14067 send in their replies. Fixes bug 23499; bugfix on 0.3.1.6-rc.
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 (unit tests, backport from 0.3.2.2-alpha):
14079 - Fix additional channelpadding unit test failures by using mocked
14080 time instead of actual time for all tests. Fixes bug 23608; bugfix
14084 Changes in version 0.3.2.2-alpha - 2017-09-29
14085 Tor 0.3.2.2-alpha is the second release in the 0.3.2 series. This
14086 release fixes several minor bugs in the new scheduler and next-
14087 generation onion services; both features were newly added in the 0.3.2
14088 series. Other fixes in this alpha include several fixes for non-fatal
14089 tracebacks which would appear in logs.
14091 With the aim to stabilise the 0.3.2 series by 15 December 2017, this
14092 alpha does not contain any substantial new features. Minor features
14093 include better testing and logging.
14095 The following comprises the complete list of changes included
14098 o Major bugfixes (relay, crash, assertion failure):
14099 - Fix a timing-based assertion failure that could occur when the
14100 circuit out-of-memory handler freed a connection's output buffer.
14101 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
14103 o Major bugfixes (scheduler):
14104 - If a channel is put into the scheduler's pending list, then it
14105 starts closing, and then if the scheduler runs before it finishes
14106 closing, the scheduler will get stuck trying to flush its cells
14107 while the lower layers refuse to cooperate. Fix that race
14108 condition by giving the scheduler an escape method. Fixes bug
14109 23676; bugfix on 0.3.2.1-alpha.
14111 o Minor features (build, compilation):
14112 - The "check-changes" feature is now part of the "make check" tests;
14113 we'll use it to try to prevent misformed changes files from
14114 accumulating. Closes ticket 23564.
14115 - Tor builds should now fail if there are any mismatches between the
14116 C type representing a configuration variable and the C type the
14117 data-driven parser uses to store a value there. Previously, we
14118 needed to check these by hand, which sometimes led to mistakes.
14119 Closes ticket 23643.
14121 o Minor features (directory authorities):
14122 - Remove longclaw's IPv6 address, as it will soon change. Authority
14123 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
14124 3/8 directory authorities with IPv6 addresses, but there are also
14125 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
14127 o Minor features (hidden service, circuit, logging):
14128 - Improve logging of many callsite in the circuit subsystem to print
14129 the circuit identifier(s).
14130 - Log when we cleanup an intro point from a service so we know when
14131 and for what reason it happened. Closes ticket 23604.
14133 o Minor features (logging):
14134 - Log more circuit information whenever we are about to try to
14135 package a relay cell on a circuit with a nonexistent n_chan.
14136 Attempt to diagnose ticket 8185.
14137 - Improve info-level log identification of particular circuits, to
14138 help with debugging. Closes ticket 23645.
14140 o Minor features (relay):
14141 - When choosing which circuits can be expired as unused, consider
14142 circuits from clients even if those clients used regular CREATE
14143 cells to make them; and do not consider circuits from relays even
14144 if they were made with CREATE_FAST. Part of ticket 22805.
14146 o Minor features (robustness):
14147 - Change several fatal assertions when flushing buffers into non-
14148 fatal assertions, to prevent any recurrence of 23690.
14150 o Minor features (spec conformance, bridge, diagnostic):
14151 - When handling the USERADDR command on an ExtOrPort, warn when the
14152 transports provides a USERADDR with no port. In a future version,
14153 USERADDR commands of this format may be rejected. Detects problems
14154 related to ticket 23080.
14156 o Minor features (testing):
14157 - Add a unit test to make sure that our own generated platform
14158 string will be accepted by directory authorities. Closes
14161 o Minor bugfixes (bootstrapping):
14162 - When warning about state file clock skew, report the correct
14163 direction for the detected skew. Fixes bug 23606; bugfix
14165 - Avoid an assertion failure when logging a state file clock skew
14166 very early in bootstrapping. Fixes bug 23607; bugfix
14169 o Minor bugfixes (build, compilation):
14170 - Fix a compilation warning when building with zstd support on
14171 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
14172 and fixed by Andreas Stieger.
14173 - When searching for OpenSSL, don't accept any OpenSSL library that
14174 lacks TLSv1_1_method(): Tor doesn't build with those versions.
14175 Additionally, look in /usr/local/opt/openssl, if it's present.
14176 These changes together repair the default build on OSX systems
14177 with Homebrew installed. Fixes bug 23602; bugfix on 0.2.7.2-alpha.
14179 o Minor bugfixes (compression):
14180 - Handle a pathological case when decompressing Zstandard data when
14181 the output buffer size is zero. Fixes bug 23551; bugfix
14184 o Minor bugfixes (documentation):
14185 - Fix manpage to not refer to the obsolete (and misspelled)
14186 UseEntryGuardsAsDirectoryGuards parameter in the description of
14187 NumDirectoryGuards. Fixes bug 23611; bugfix on 0.2.4.8-alpha.
14189 o Minor bugfixes (hidden service v3):
14190 - Don't log an assertion failure when we can't find the right
14191 information to extend to an introduction point. In rare cases,
14192 this could happen, causing a warning, even though tor would
14193 recover gracefully. Fixes bug 23159; bugfix on 0.3.2.1-alpha.
14194 - Pad RENDEZVOUS cell up to the size of the legacy cell which is
14195 much bigger so the rendezvous point can't distinguish which hidden
14196 service protocol is being used. Fixes bug 23420; bugfix
14199 o Minor bugfixes (hidden service, relay):
14200 - Avoid a possible double close of a circuit by the intro point on
14201 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
14202 bugfix on 0.3.0.1-alpha.
14204 o Minor bugfixes (logging, relay shutdown, annoyance):
14205 - When a circuit is marked for close, do not attempt to package any
14206 cells for channels on that circuit. Previously, we would detect
14207 this condition lower in the call stack, when we noticed that the
14208 circuit had no attached channel, and log an annoying message.
14209 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
14211 o Minor bugfixes (scheduler):
14212 - When switching schedulers due to a consensus change, we didn't
14213 give the new scheduler a chance to react to the consensus. Fix
14214 that. Fixes bug 23537; bugfix on 0.3.2.1-alpha.
14215 - Make the KISTSchedRunInterval option a non negative value. With
14216 this, the way to disable KIST through the consensus is to set it
14217 to 0. Fixes bug 23539; bugfix on 0.3.2.1-alpha.
14218 - Only notice log the selected scheduler when we switch scheduler
14219 types. Fixes bug 23552; bugfix on 0.3.2.1-alpha.
14220 - Avoid a compilation warning on macOS in scheduler_ev_add() caused
14221 by a different tv_usec data type. Fixes bug 23575; bugfix
14223 - Make a hard exit if tor is unable to pick a scheduler which can
14224 happen if the user specifies a scheduler type that is not
14225 supported and not other types in Schedulers. Fixes bug 23581;
14226 bugfix on 0.3.2.1-alpha.
14227 - Properly initialize the scheduler last run time counter so it is
14228 not 0 at the first tick. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
14230 o Minor bugfixes (testing):
14231 - Capture and detect several "Result does not fit" warnings in unit
14232 tests on platforms with 32-bit time_t. Fixes bug 21800; bugfix
14234 - Fix additional channelpadding unit test failures by using mocked
14235 time instead of actual time for all tests. Fixes bug 23608; bugfix
14237 - The removal of some old scheduler options caused some tests to
14238 fail on BSD systems. Assume current behavior is correct and make
14239 the tests pass again. Fixes bug 23566; bugfix on 0.3.2.1-alpha.
14241 o Code simplification and refactoring:
14242 - Remove various ways of testing circuits and connections for
14243 "clientness"; instead, favor channel_is_client(). Part of
14246 o Deprecated features:
14247 - The ReachableDirAddresses and ClientPreferIPv6DirPort options are
14248 now deprecated; they do not apply to relays, and they have had no
14249 effect on clients since 0.2.8.x. Closes ticket 19704.
14252 - HiddenServiceVersion man page entry wasn't mentioning the now
14253 supported version 3. Fixes ticket 23580; bugfix on 0.3.2.1-alpha.
14254 - Clarify that the Address option is entirely about setting an
14255 advertised IPv4 address. Closes ticket 18891.
14256 - Clarify the manpage's use of the term "address" to clarify what
14257 kind of address is intended. Closes ticket 21405.
14258 - Document that onion service subdomains are allowed, and ignored.
14259 Closes ticket 18736.
14262 Changes in version 0.3.2.1-alpha - 2017-09-18
14263 Tor 0.3.2.1-alpha is the first release in the 0.3.2.x series. It
14264 includes support for our next-generation ("v3") onion service
14265 protocol, and adds a new circuit scheduler for more responsive
14266 forwarding decisions from relays. There are also numerous other small
14267 features and bugfixes here.
14269 Below are the changes since Tor 0.3.1.7.
14271 o Major feature (scheduler, channel):
14272 - Tor now uses new schedulers to decide which circuits should
14273 deliver cells first, in order to improve congestion at relays. The
14274 first type is called "KIST" ("Kernel Informed Socket Transport"),
14275 and is only available on Linux-like systems: it uses feedback from
14276 the kernel to prevent the kernel's TCP buffers from growing too
14277 full. The second new scheduler type is called "KISTLite": it
14278 behaves the same as KIST, but runs on systems without kernel
14279 support for inspecting TCP implementation details. The old
14280 scheduler is still available, under the name "Vanilla". To change
14281 the default scheduler preference order, use the new "Schedulers"
14282 option. (The default preference order is "KIST,KISTLite,Vanilla".)
14284 Matt Traudt implemented KIST, based on research by Rob Jansen,
14285 John Geddes, Christ Wacek, Micah Sherr, and Paul Syverson. For
14286 more information, see the design paper at
14287 http://www.robgjansen.com/publications/kist-sec2014.pdf and the
14288 followup implementation paper at https://arxiv.org/abs/1709.01044.
14289 Closes ticket 12541.
14291 o Major features (next-generation onion services):
14292 - Tor now supports the next-generation onion services protocol for
14293 clients and services! As part of this release, the core of
14294 proposal 224 has been implemented and is available for
14295 experimentation and testing by our users. This newer version of
14296 onion services ("v3") features many improvements over the legacy
14299 a) Better crypto (replaced SHA1/DH/RSA1024
14300 with SHA3/ed25519/curve25519)
14302 b) Improved directory protocol, leaking much less information to
14305 c) Improved directory protocol, with smaller surface for
14308 d) Better onion address security against impersonation.
14310 e) More extensible introduction/rendezvous protocol.
14312 f) A cleaner and more modular codebase.
14314 You can identify a next-generation onion address by its length:
14315 they are 56 characters long, as in
14316 "4acth47i6kxnvkewtm6q7ib2s3ufpo5sqbsnzjpbi7utijcltosqemad.onion".
14318 In the future, we will release more options and features for v3
14319 onion services, but we first need a testing period, so that the
14320 current codebase matures and becomes more robust. Planned features
14321 include: offline keys, advanced client authorization, improved
14322 guard algorithms, and statistics. For full details, see
14325 Legacy ("v2") onion services will still work for the foreseeable
14326 future, and will remain the default until this new codebase gets
14327 tested and hardened. Service operators who want to experiment with
14328 the new system can use the 'HiddenServiceVersion 3' torrc
14329 directive along with the regular onion service configuration
14330 options. We will publish a blog post about this new feature
14333 o Major bugfixes (usability, control port):
14334 - Report trusted clock skew indications as bootstrap errors, so
14335 controllers can more easily alert users when their clocks are
14336 wrong. Fixes bug 23506; bugfix on 0.1.2.6-alpha.
14338 o Minor features (bug detection):
14339 - Log a warning message with a stack trace for any attempt to call
14340 get_options() during option validation. This pattern has caused
14341 subtle bugs in the past. Closes ticket 22281.
14343 o Minor features (client):
14344 - You can now use Tor as a tunneled HTTP proxy: use the new
14345 HTTPTunnelPort option to open a port that accepts HTTP CONNECT
14346 requests. Closes ticket 22407.
14347 - Add an extra check to make sure that we always use the newer guard
14348 selection code for picking our guards. Closes ticket 22779.
14349 - When downloading (micro)descriptors, don't split the list into
14350 multiple requests unless we want at least 32 descriptors.
14351 Previously, we split at 4, not 32, which led to significant
14352 overhead in HTTP request size and degradation in compression
14353 performance. Closes ticket 23220.
14355 o Minor features (command line):
14356 - Add a new commandline option, --key-expiration, which prints when
14357 the current signing key is going to expire. Implements ticket
14358 17639; patch by Isis Lovecruft.
14360 o Minor features (control port):
14361 - If an application tries to use the control port as an HTTP proxy,
14362 respond with a meaningful "This is the Tor control port" message,
14363 and log the event. Closes ticket 1667. Patch from Ravi
14365 - Provide better error message for GETINFO desc/(id|name) when not
14366 fetching router descriptors. Closes ticket 5847. Patch by
14368 - Add GETINFO "{desc,md}/download-enabled", to inform the controller
14369 whether Tor will try to download router descriptors and
14370 microdescriptors respectively. Closes ticket 22684.
14371 - Added new GETINFO targets "ip-to-country/{ipv4,ipv6}-available",
14372 so controllers can tell whether the geoip databases are loaded.
14373 Closes ticket 23237.
14374 - Adds a timestamp field to the CIRC_BW and STREAM_BW bandwidth
14375 events. Closes ticket 19254. Patch by "DonnchaC".
14377 o Minor features (development support):
14378 - Developers can now generate a call-graph for Tor using the
14379 "calltool" python program, which post-processes object dumps. It
14380 should work okay on many Linux and OSX platforms, and might work
14381 elsewhere too. To run it, install calltool from
14382 https://gitweb.torproject.org/user/nickm/calltool.git and run
14383 "make callgraph". Closes ticket 19307.
14385 o Minor features (ed25519):
14386 - Add validation function to checks for torsion components in
14387 ed25519 public keys, used by prop224 client-side code. Closes
14388 ticket 22006. Math help by Ian Goldberg.
14390 o Minor features (exit relay, DNS):
14391 - Improve the clarity and safety of the log message from evdns when
14392 receiving an apparently spoofed DNS reply. Closes ticket 3056.
14394 o Minor features (integration, hardening):
14395 - Add a new NoExec option to prevent Tor from running other
14396 programs. When this option is set to 1, Tor will never try to run
14397 another program, regardless of the settings of
14398 PortForwardingHelper, ClientTransportPlugin, or
14399 ServerTransportPlugin. Once NoExec is set, it cannot be disabled
14400 without restarting Tor. Closes ticket 22976.
14402 o Minor features (logging):
14403 - Improve the warning message for specifying a relay by nickname.
14404 The previous message implied that nickname registration was still
14405 part of the Tor network design, which it isn't. Closes
14407 - If the sandbox filter fails to load, suggest to the user that
14408 their kernel might not support seccomp2. Closes ticket 23090.
14410 o Minor features (portability):
14411 - Check at configure time whether uint8_t is the same type as
14412 unsigned char. Lots of existing code already makes this
14413 assumption, and there could be strict aliasing issues if the
14414 assumption is violated. Closes ticket 22410.
14416 o Minor features (relay, configuration):
14417 - Reject attempts to use relative file paths when RunAsDaemon is
14418 set. Previously, Tor would accept these, but the directory-
14419 changing step of RunAsDaemon would give strange and/or confusing
14420 results. Closes ticket 22731.
14422 o Minor features (startup, safety):
14423 - When configured to write a PID file, Tor now exits if it is unable
14424 to do so. Previously, it would warn and continue. Closes
14427 o Minor features (static analysis):
14428 - The BUG() macro has been changed slightly so that Coverity no
14429 longer complains about dead code if the bug is impossible. Closes
14432 o Minor features (testing):
14433 - The default chutney network tests now include tests for the v3
14434 hidden service design. Make sure you have the latest version of
14435 chutney if you want to run these. Closes ticket 22437.
14436 - Add a unit test to verify that we can parse a hardcoded v2 hidden
14437 service descriptor. Closes ticket 15554.
14439 o Minor bugfixes (certificate handling):
14440 - Fix a time handling bug in Tor certificates set to expire after
14441 the year 2106. Fixes bug 23055; bugfix on 0.3.0.1-alpha. Found by
14442 Coverity as CID 1415728.
14444 o Minor bugfixes (client, usability):
14445 - Refrain from needlessly rejecting SOCKS5-with-hostnames and
14446 SOCKS4a requests that contain IP address strings, even when
14447 SafeSocks in enabled, as this prevents user from connecting to
14448 known IP addresses without relying on DNS for resolving. SafeSocks
14449 still rejects SOCKS connections that connect to IP addresses when
14450 those addresses are _not_ encoded as hostnames. Fixes bug 22461;
14451 bugfix on Tor 0.2.6.2-alpha.
14453 o Minor bugfixes (code correctness):
14454 - Call htons() in extend_cell_format() for encoding a 16-bit value.
14455 Previously we used ntohs(), which happens to behave the same on
14456 all the platforms we support, but which isn't really correct.
14457 Fixes bug 23106; bugfix on 0.2.4.8-alpha.
14458 - For defense-in-depth, make the controller's write_escaped_data()
14459 function robust to extremely long inputs. Fixes bug 19281; bugfix
14460 on 0.1.1.1-alpha. Reported by Guido Vranken.
14462 o Minor bugfixes (compilation):
14463 - Fix unused-variable warnings in donna's Curve25519 SSE2 code.
14464 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
14466 o Minor bugfixes (consensus expiry):
14467 - Check for adequate directory information correctly. Previously, Tor
14468 would reconsider whether it had sufficient directory information
14469 every 2 minutes. Fixes bug 23091; bugfix on 0.2.0.19-alpha.
14471 o Minor bugfixes (directory protocol):
14472 - Directory servers now include a "Date:" http header for response
14473 codes other than 200. Clients starting with a skewed clock and a
14474 recent consensus were getting "304 Not modified" responses from
14475 directory authorities, so without the Date header, the client
14476 would never hear about a wrong clock. Fixes bug 23499; bugfix
14478 - Make clients wait for 6 seconds before trying to download a
14479 consensus from an authority. Fixes bug 17750; bugfix
14482 o Minor bugfixes (DoS-resistance):
14483 - If future code asks if there are any running bridges, without
14484 checking if bridges are enabled, log a BUG warning rather than
14485 crashing. Fixes bug 23524; bugfix on 0.3.0.1-alpha.
14487 o Minor bugfixes (format strictness):
14488 - Restrict several data formats to decimal. Previously, the
14489 BuildTimeHistogram entries in the state file, the "bw=" entries in
14490 the bandwidth authority file, and the process IDs passed to the
14491 __OwningControllerProcess option could all be specified in hex or
14492 octal as well as in decimal. This was not an intentional feature.
14493 Fixes bug 22802; bugfixes on 0.2.2.1-alpha, 0.2.2.2-alpha,
14496 o Minor bugfixes (heartbeat):
14497 - If we fail to write a heartbeat message, schedule a retry for the
14498 minimum heartbeat interval number of seconds in the future. Fixes
14499 bug 19476; bugfix on 0.2.3.1-alpha.
14501 o Minor bugfixes (linux seccomp2 sandbox, logging):
14502 - Fix some messages on unexpected errors from the seccomp2 library.
14503 Fixes bug 22750; bugfix on 0.2.5.1-alpha. Patch from "cypherpunks".
14505 o Minor bugfixes (logging):
14506 - Remove duplicate log messages regarding opening non-local
14507 SocksPorts upon parsing config and opening listeners at startup.
14508 Fixes bug 4019; bugfix on 0.2.3.3-alpha.
14509 - Use a more comprehensible log message when telling the user
14510 they've excluded every running exit node. Fixes bug 7890; bugfix
14512 - When logging the number of descriptors we intend to download per
14513 directory request, do not log a number higher than then the number
14514 of descriptors we're fetching in total. Fixes bug 19648; bugfix
14516 - When warning about a directory owned by the wrong user, log the
14517 actual name of the user owning the directory. Previously, we'd log
14518 the name of the process owner twice. Fixes bug 23487; bugfix
14520 - The tor specification says hop counts are 1-based, so fix two log
14521 messages that mistakenly logged 0-based hop counts. Fixes bug
14522 18982; bugfix on 0.2.6.2-alpha and 0.2.4.5-alpha. Patch by teor.
14523 Credit to Xiaofan Li for reporting this issue.
14525 o Minor bugfixes (portability):
14526 - Stop using the PATH_MAX variable, which is not defined on GNU
14527 Hurd. Fixes bug 23098; bugfix on 0.3.1.1-alpha.
14529 o Minor bugfixes (relay):
14530 - When uploading our descriptor for the first time after startup,
14531 report the reason for uploading as "Tor just started" rather than
14532 leaving it blank. Fixes bug 22885; bugfix on 0.2.3.4-alpha.
14533 - Avoid unnecessary calls to directory_fetches_from_authorities() on
14534 relays, to prevent spurious address resolutions and descriptor
14535 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
14536 bugfix on in 0.2.8.1-alpha.
14538 o Minor bugfixes (tests):
14539 - Fix a broken unit test for the OutboundAddress option: the parsing
14540 function was never returning an error on failure. Fixes bug 23366;
14541 bugfix on 0.3.0.3-alpha.
14542 - Fix a signed-integer overflow in the unit tests for
14543 dir/download_status_random_backoff, which was untriggered until we
14544 fixed bug 17750. Fixes bug 22924; bugfix on 0.2.9.1-alpha.
14546 o Minor bugfixes (usability, control port):
14547 - Stop making an unnecessary routerlist check in NETINFO clock skew
14548 detection; this was preventing clients from reporting NETINFO clock
14549 skew to controllers. Fixes bug 23532; bugfix on 0.2.4.4-alpha.
14551 o Code simplification and refactoring:
14552 - Extract the code for handling newly-open channels into a separate
14553 function from the general code to handle channel state
14554 transitions. This change simplifies our callgraph, reducing the
14555 size of the largest strongly connected component by roughly a
14556 factor of two. Closes ticket 22608.
14557 - Remove dead code for largely unused statistics on the number of
14558 times we've attempted various public key operations. Fixes bug
14559 19871; bugfix on 0.1.2.4-alpha. Fix by Isis Lovecruft.
14560 - Remove several now-obsolete functions for asking about old
14561 variants directory authority status. Closes ticket 22311; patch
14563 - Remove some of the code that once supported "Named" and "Unnamed"
14564 routers. Authorities no longer vote for these flags. Closes
14566 - Rename the obsolete malleable hybrid_encrypt functions used in TAP
14567 and old hidden services, to indicate that they aren't suitable for
14568 new protocols or formats. Closes ticket 23026.
14569 - Replace our STRUCT_OFFSET() macro with offsetof(). Closes ticket
14570 22521. Patch from Neel Chauhan.
14571 - Split the enormous circuit_send_next_onion_skin() function into
14572 multiple subfunctions. Closes ticket 22804.
14573 - Split the portions of the buffer.c module that handle particular
14574 protocols into separate modules. Part of ticket 23149.
14575 - Use our test macros more consistently, to produce more useful
14576 error messages when our unit tests fail. Add coccinelle patches to
14577 allow us to re-check for test macro uses. Closes ticket 22497.
14579 o Deprecated features:
14580 - Deprecate HTTPProxy/HTTPProxyAuthenticator config options. They
14581 only applies to direct unencrypted HTTP connections to your
14582 directory server, which your Tor probably isn't using. Closes
14586 - Clarify in the manual that "Sandbox 1" is only supported on Linux
14587 kernels. Closes ticket 22677.
14588 - Document all values of PublishServerDescriptor in the manpage.
14589 Closes ticket 15645.
14590 - Improve the documentation for the directory port part of the
14591 DirAuthority line. Closes ticket 20152.
14592 - Restore documentation for the authorities' "approved-routers"
14593 file. Closes ticket 21148.
14595 o Removed features:
14596 - The AllowDotExit option has been removed as unsafe. It has been
14597 deprecated since 0.2.9.2-alpha. Closes ticket 23426.
14598 - The ClientDNSRejectInternalAddresses flag can no longer be set on
14599 non-testing networks. It has been deprecated since 0.2.9.2-alpha.
14600 Closes ticket 21031.
14601 - The controller API no longer includes an AUTHDIR_NEWDESCS event:
14602 nobody was using it any longer. Closes ticket 22377.
14605 Changes in version 0.2.8.15 - 2017-09-18
14606 Tor 0.2.8.15 backports a collection of bugfixes from later
14609 Most significantly, it includes a fix for TROVE-2017-008, a
14610 security bug that affects hidden services running with the
14611 SafeLogging option disabled. For more information, see
14612 https://trac.torproject.org/projects/tor/ticket/23490
14614 Note that Tor 0.2.8.x will no longer be supported after 1 Jan
14615 2018. We suggest that you upgrade to the latest stable release if
14616 possible. If you can't, we recommend that you upgrade at least to
14617 0.2.9, which will be supported until 2020.
14619 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
14620 - Avoid an assertion failure bug affecting our implementation of
14621 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14622 handling of "0xx" differs from what we had expected. Fixes bug
14623 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14626 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14629 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
14630 - Backport a fix for an "unused variable" warning that appeared
14631 in some versions of mingw. Fixes bug 22838; bugfix on
14634 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
14635 - Fix a memset() off the end of an array when packing cells. This
14636 bug should be harmless in practice, since the corrupted bytes are
14637 still in the same structure, and are always padding bytes,
14638 ignored, or immediately overwritten, depending on compiler
14639 behavior. Nevertheless, because the memset()'s purpose is to make
14640 sure that any other cell-handling bugs can't expose bytes to the
14641 network, we need to fix it. Fixes bug 22737; bugfix on
14642 0.2.4.11-alpha. Fixes CID 1401591.
14644 o Build features (backport from 0.3.1.5-alpha):
14645 - Tor's repository now includes a Travis Continuous Integration (CI)
14646 configuration file (.travis.yml). This is meant to help new
14647 developers and contributors who fork Tor to a Github repository be
14648 better able to test their changes, and understand what we expect
14649 to pass. To use this new build feature, you must fork Tor to your
14650 Github account, then go into the "Integrations" menu in the
14651 repository settings for your fork and enable Travis, then push
14652 your changes. Closes ticket 22636.
14655 Changes in version 0.2.9.12 - 2017-09-18
14656 Tor 0.2.9.12 backports a collection of bugfixes from later
14659 Most significantly, it includes a fix for TROVE-2017-008, a
14660 security bug that affects hidden services running with the
14661 SafeLogging option disabled. For more information, see
14662 https://trac.torproject.org/projects/tor/ticket/23490
14664 o Major features (security, backport from 0.3.0.2-alpha):
14665 - Change the algorithm used to decide DNS TTLs on client and server
14666 side, to better resist DNS-based correlation attacks like the
14667 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
14668 Feamster. Now relays only return one of two possible DNS TTL
14669 values, and clients are willing to believe DNS TTL values up to 3
14670 hours long. Closes ticket 19769.
14672 o Major bugfixes (crash, directory connections, backport from 0.3.0.5-rc):
14673 - Fix a rare crash when sending a begin cell on a circuit whose
14674 linked directory connection had already been closed. Fixes bug
14675 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
14677 o Major bugfixes (DNS, backport from 0.3.0.2-alpha):
14678 - Fix a bug that prevented exit nodes from caching DNS records for
14679 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
14681 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
14682 - Fix a typo that had prevented TPROXY-based transparent proxying
14683 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
14684 Patch from "d4fq0fQAgoJ".
14686 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
14687 - Avoid an assertion failure bug affecting our implementation of
14688 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14689 handling of "0xx" differs from what we had expected. Fixes bug
14690 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14692 o Minor features (code style, backport from 0.3.1.3-alpha):
14693 - Add "Falls through" comments to our codebase, in order to silence
14694 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
14695 Stieger. Closes ticket 22446.
14697 o Minor features (geoip):
14698 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14701 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.1-alpha):
14702 - Roll over monthly accounting at the configured hour and minute,
14703 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
14704 Found by Andrey Karpov with PVS-Studio.
14706 o Minor bugfixes (compilation, backport from 0.3.1.5-alpha):
14707 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
14708 bugfix on 0.2.8.1-alpha.
14709 - Fix warnings when building with libscrypt and openssl scrypt support
14710 on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
14711 - When building with certain versions the mingw C header files, avoid
14712 float-conversion warnings when calling the C functions isfinite(),
14713 isnan(), and signbit(). Fixes bug 22801; bugfix on 0.2.8.1-alpha.
14715 o Minor bugfixes (compilation, backport from 0.3.1.7):
14716 - Avoid compiler warnings in the unit tests for running tor_sscanf()
14717 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
14719 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
14720 - Backport a fix for an "unused variable" warning that appeared
14721 in some versions of mingw. Fixes bug 22838; bugfix on
14724 o Minor bugfixes (controller, backport from 0.3.1.7):
14725 - Do not crash when receiving a HSPOST command with an empty body.
14726 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
14727 - Do not crash when receiving a POSTDESCRIPTOR command with an
14728 empty body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
14730 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
14731 - Avoid Coverity build warnings related to our BUG() macro. By
14732 default, Coverity treats BUG() as the Linux kernel does: an
14733 instant abort(). We need to override that so our BUG() macro
14734 doesn't prevent Coverity from analyzing functions that use it.
14735 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
14737 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
14738 - Fix a memset() off the end of an array when packing cells. This
14739 bug should be harmless in practice, since the corrupted bytes are
14740 still in the same structure, and are always padding bytes,
14741 ignored, or immediately overwritten, depending on compiler
14742 behavior. Nevertheless, because the memset()'s purpose is to make
14743 sure that any other cell-handling bugs can't expose bytes to the
14744 network, we need to fix it. Fixes bug 22737; bugfix on
14745 0.2.4.11-alpha. Fixes CID 1401591.
14747 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
14748 - When setting the maximum number of connections allowed by the OS,
14749 always allow some extra file descriptors for other files. Fixes
14750 bug 22797; bugfix on 0.2.0.10-alpha.
14752 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
14753 - Avoid a sandbox failure when trying to re-bind to a socket and
14754 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
14756 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
14757 - Permit the fchmod system call, to avoid crashing on startup when
14758 starting with the seccomp2 sandbox and an unexpected set of
14759 permissions on the data directory or its contents. Fixes bug
14760 22516; bugfix on 0.2.5.4-alpha.
14762 o Minor bugfixes (relay, backport from 0.3.0.5-rc):
14763 - Avoid a double-marked-circuit warning that could happen when we
14764 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
14767 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
14768 - Reject version numbers with non-numeric prefixes (such as +, -, or
14769 whitespace). Disallowing whitespace prevents differential version
14770 parsing between POSIX-based and Windows platforms. Fixes bug 21507
14771 and part of 21508; bugfix on 0.0.8pre1.
14773 o Build features (backport from 0.3.1.5-alpha):
14774 - Tor's repository now includes a Travis Continuous Integration (CI)
14775 configuration file (.travis.yml). This is meant to help new
14776 developers and contributors who fork Tor to a Github repository be
14777 better able to test their changes, and understand what we expect
14778 to pass. To use this new build feature, you must fork Tor to your
14779 Github account, then go into the "Integrations" menu in the
14780 repository settings for your fork and enable Travis, then push
14781 your changes. Closes ticket 22636.
14784 Changes in version 0.3.0.11 - 2017-09-18
14785 Tor 0.3.0.11 backports a collection of bugfixes from Tor the 0.3.1
14788 Most significantly, it includes a fix for TROVE-2017-008, a
14789 security bug that affects hidden services running with the
14790 SafeLogging option disabled. For more information, see
14791 https://trac.torproject.org/projects/tor/ticket/23490
14793 o Minor features (code style, backport from 0.3.1.7):
14794 - Add "Falls through" comments to our codebase, in order to silence
14795 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
14796 Stieger. Closes ticket 22446.
14799 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14802 o Minor bugfixes (compilation, backport from 0.3.1.7):
14803 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
14804 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
14806 o Minor bugfixes (controller, backport from 0.3.1.7):
14807 - Do not crash when receiving a HSPOST command with an empty body.
14808 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
14809 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
14810 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
14812 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
14813 - When setting the maximum number of connections allowed by the OS,
14814 always allow some extra file descriptors for other files. Fixes
14815 bug 22797; bugfix on 0.2.0.10-alpha.
14817 o Minor bugfixes (logging, relay, backport from 0.3.1.6-rc):
14818 - Remove a forgotten debugging message when an introduction point
14819 successfully establishes a hidden service prop224 circuit with
14821 - Change three other log_warn() for an introduction point to
14822 protocol warnings, because they can be failure from the network
14823 and are not relevant to the operator. Fixes bug 23078; bugfix on
14824 0.3.0.1-alpha and 0.3.0.2-alpha.
14827 Changes in version 0.3.1.7 - 2017-09-18
14828 Tor 0.3.1.7 is the first stable release in the 0.3.1 series.
14830 With the 0.3.1 series, Tor now serves and downloads directory
14831 information in more compact formats, to save on bandwidth overhead. It
14832 also contains a new padding system to resist netflow-based traffic
14833 analysis, and experimental support for building parts of Tor in Rust
14834 (though no parts of Tor are in Rust yet). There are also numerous
14835 small features, bugfixes on earlier release series, and groundwork for
14836 the hidden services revamp of 0.3.2.
14838 This release also includes a fix for TROVE-2017-008, a security bug
14839 that affects hidden services running with the SafeLogging option
14840 disabled. For more information, see
14841 https://trac.torproject.org/projects/tor/ticket/23490
14843 Per our stable release policy, we plan to support each stable release
14844 series for at least the next nine months, or for three months after
14845 the first stable release of the next series: whichever is longer. If
14846 you need a release with long-term support, we recommend that you stay
14847 with the 0.2.9 series.
14849 Below is a list of the changes since 0.3.1.6-rc. For a list of all
14850 changes since 0.3.0, see the ReleaseNotes file.
14852 o Major bugfixes (security, hidden services, loggging):
14853 - Fix a bug where we could log uninitialized stack when a certain
14854 hidden service error occurred while SafeLogging was disabled.
14855 Fixes bug #23490; bugfix on 0.2.7.2-alpha. This is also tracked as
14856 TROVE-2017-008 and CVE-2017-0380.
14858 o Minor features (defensive programming):
14859 - Create a pair of consensus parameters, nf_pad_tor2web and
14860 nf_pad_single_onion, to disable netflow padding in the consensus
14861 for non-anonymous connections in case the overhead is high. Closes
14864 o Minor features (diagnostic):
14865 - Add a stack trace to the bug warnings that can be logged when
14866 trying to send an outgoing relay cell with n_chan == 0. Diagnostic
14867 attempt for bug 23105.
14869 o Minor features (geoip):
14870 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14873 o Minor bugfixes (compilation):
14874 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
14875 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
14877 o Minor bugfixes (controller):
14878 - Do not crash when receiving a HSPOST command with an empty body.
14879 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
14880 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
14881 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
14883 o Minor bugfixes (relay):
14884 - Inform the geoip and rephist modules about all requests, even on
14885 relays that are only fetching microdescriptors. Fixes a bug
14886 related to 21585; bugfix on 0.3.0.1-alpha.
14888 o Minor bugfixes (unit tests):
14889 - Fix a channelpadding unit test failure on slow systems by using
14890 mocked time instead of actual time. Fixes bug 23077; bugfix
14894 Changes in version 0.3.1.6-rc - 2017-09-05
14895 Tor 0.3.1.6-rc fixes a few small bugs and annoyances in the 0.3.1
14896 release series, including a bug that produced weird behavior on
14897 Windows directory caches.
14899 This is the first release candidate in the Tor 0.3.1 series. If we
14900 find no new bugs or regressions here, the first stable 0.3.1 release
14901 will be nearly identical to it.
14903 o Major bugfixes (windows, directory cache):
14904 - On Windows, do not try to delete cached consensus documents and
14905 diffs before they are unmapped from memory--Windows won't allow
14906 that. Instead, allow the consensus cache directory to grow larger,
14907 to hold files that might need to stay around longer. Fixes bug
14908 22752; bugfix on 0.3.1.1-alpha.
14910 o Minor features (directory authority):
14911 - Improve the message that authorities report to relays that present
14912 RSA/Ed25519 keypairs that conflict with previously pinned keys.
14913 Closes ticket 22348.
14915 o Minor features (geoip):
14916 - Update geoip and geoip6 to the August 3 2017 Maxmind GeoLite2
14919 o Minor features (testing):
14920 - Add more tests for compression backend initialization. Closes
14923 o Minor bugfixes (directory cache):
14924 - Fix a memory leak when recovering space in the consensus cache.
14925 Fixes bug 23139; bugfix on 0.3.1.1-alpha.
14927 o Minor bugfixes (hidden service):
14928 - Increase the number of circuits that a service is allowed to
14929 open over a specific period of time. The value was lower than it
14930 should be (8 vs 12) in the normal case of 3 introduction points.
14931 Fixes bug 22159; bugfix on 0.3.0.5-rc.
14932 - Fix a BUG warning during HSv3 descriptor decoding that could be
14933 cause by a specially crafted descriptor. Fixes bug 23233; bugfix
14934 on 0.3.0.1-alpha. Bug found by "haxxpop".
14935 - Rate-limit the log messages if we exceed the maximum number of
14936 allowed intro circuits. Fixes bug 22159; bugfix on 0.3.1.1-alpha.
14938 o Minor bugfixes (logging, relay):
14939 - Remove a forgotten debugging message when an introduction point
14940 successfully establishes a hidden service prop224 circuit with
14942 - Change three other log_warn() for an introduction point to
14943 protocol warnings, because they can be failure from the network
14944 and are not relevant to the operator. Fixes bug 23078; bugfix on
14945 0.3.0.1-alpha and 0.3.0.2-alpha.
14947 o Minor bugfixes (relay):
14948 - When a relay is not running as a directory cache, it will no
14949 longer generate compressed consensuses and consensus diff
14950 information. Previously, this was a waste of disk and CPU. Fixes
14951 bug 23275; bugfix on 0.3.1.1-alpha.
14953 o Minor bugfixes (robustness, error handling):
14954 - Improve our handling of the cases where OpenSSL encounters a
14955 memory error while encoding keys and certificates. We haven't
14956 observed these errors in the wild, but if they do happen, we now
14957 detect and respond better. Fixes bug 19418; bugfix on all versions
14958 of Tor. Reported by Guido Vranken.
14960 o Minor bugfixes (stability):
14961 - Avoid crashing on a double-free when unable to load or process an
14962 included file. Fixes bug 23155; bugfix on 0.3.1.1-alpha. Found
14963 with the clang static analyzer.
14965 o Minor bugfixes (testing):
14966 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
14967 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
14968 - Port the hs_ntor handshake test to work correctly with recent
14969 versions of the pysha3 module. Fixes bug 23071; bugfix
14972 o Minor bugfixes (Windows service):
14973 - When running as a Windows service, set the ID of the main thread
14974 correctly. Failure to do so made us fail to send log messages to
14975 the controller in 0.2.1.16-rc, slowed down controller event
14976 delivery in 0.2.7.3-rc and later, and crash with an assertion
14977 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
14978 Patch and diagnosis from "Vort".
14981 Changes in version 0.3.0.10 - 2017-08-02
14982 Tor 0.3.0.10 backports a collection of small-to-medium bugfixes
14983 from the current Tor alpha series. OpenBSD users and TPROXY users
14984 should upgrade; others are probably okay sticking with 0.3.0.9.
14986 o Major features (build system, continuous integration, backport from 0.3.1.5-alpha):
14987 - Tor's repository now includes a Travis Continuous Integration (CI)
14988 configuration file (.travis.yml). This is meant to help new
14989 developers and contributors who fork Tor to a Github repository be
14990 better able to test their changes, and understand what we expect
14991 to pass. To use this new build feature, you must fork Tor to your
14992 Github account, then go into the "Integrations" menu in the
14993 repository settings for your fork and enable Travis, then push
14994 your changes. Closes ticket 22636.
14996 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
14997 - Fix a typo that had prevented TPROXY-based transparent proxying
14998 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
14999 Patch from "d4fq0fQAgoJ".
15001 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
15002 - Avoid an assertion failure bug affecting our implementation of
15003 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
15004 handling of "0xbar" differs from what we had expected. Fixes bug
15005 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
15007 o Minor features (backport from 0.3.1.5-alpha):
15008 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
15011 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.2-alpha):
15012 - Roll over monthly accounting at the configured hour and minute,
15013 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
15014 Found by Andrey Karpov with PVS-Studio.
15016 o Minor bugfixes (compilation warnings, backport from 0.3.1.5-alpha):
15017 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
15018 bugfix on 0.2.8.1-alpha.
15019 - Fix warnings when building with libscrypt and openssl scrypt
15020 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
15021 - When building with certain versions of the mingw C header files,
15022 avoid float-conversion warnings when calling the C functions
15023 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
15026 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
15027 - Backport a fix for an "unused variable" warning that appeared
15028 in some versions of mingw. Fixes bug 22838; bugfix on
15031 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
15032 - Avoid Coverity build warnings related to our BUG() macro. By
15033 default, Coverity treats BUG() as the Linux kernel does: an
15034 instant abort(). We need to override that so our BUG() macro
15035 doesn't prevent Coverity from analyzing functions that use it.
15036 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
15038 o Minor bugfixes (directory authority, backport from 0.3.1.1-alpha):
15039 - When rejecting a router descriptor for running an obsolete version
15040 of Tor without ntor support, warn about the obsolete tor version,
15041 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
15043 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
15044 - Avoid a sandbox failure when trying to re-bind to a socket and
15045 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
15047 o Minor bugfixes (unit tests, backport from 0.3.1.5-alpha)
15048 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
15049 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
15052 Changes in version 0.3.1.5-alpha - 2017-08-01
15053 Tor 0.3.1.5-alpha improves the performance of consensus diff
15054 calculation, fixes a crash bug on older versions of OpenBSD, and fixes
15055 several other bugs. If no serious bugs are found in this version, the
15056 next version will be a release candidate.
15058 This release also marks the end of support for the Tor 0.2.4.x,
15059 0.2.6.x, and 0.2.7.x release series. Those releases will receive no
15060 further bug or security fixes. Anyone still running or distributing
15061 one of those versions should upgrade.
15063 o Major features (build system, continuous integration):
15064 - Tor's repository now includes a Travis Continuous Integration (CI)
15065 configuration file (.travis.yml). This is meant to help new
15066 developers and contributors who fork Tor to a Github repository be
15067 better able to test their changes, and understand what we expect
15068 to pass. To use this new build feature, you must fork Tor to your
15069 Github account, then go into the "Integrations" menu in the
15070 repository settings for your fork and enable Travis, then push
15071 your changes. Closes ticket 22636.
15073 o Major bugfixes (openbsd, denial-of-service):
15074 - Avoid an assertion failure bug affecting our implementation of
15075 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
15076 handling of "0xbar" differs from what we had expected. Fixes bug
15077 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
15079 o Major bugfixes (relay, performance):
15080 - Perform circuit handshake operations at a higher priority than we
15081 use for consensus diff creation and compression. This should
15082 prevent circuits from starving when a relay or bridge receives a
15083 new consensus, especially on lower-powered machines. Fixes bug
15084 22883; bugfix on 0.3.1.1-alpha.
15086 o Minor features (bridge authority):
15087 - Add "fingerprint" lines to the networkstatus-bridges file produced
15088 by bridge authorities. Closes ticket 22207.
15090 o Minor features (directory cache, consensus diff):
15091 - Add a new MaxConsensusAgeForDiffs option to allow directory cache
15092 operators with low-resource environments to adjust the number of
15093 consensuses they'll store and generate diffs from. Most cache
15094 operators should leave it unchanged. Helps to work around
15097 o Minor features (geoip):
15098 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
15101 o Minor features (relay, performance):
15102 - Always start relays with at least two worker threads, to prevent
15103 priority inversion on slow tasks. Part of the fix for bug 22883.
15104 - Allow background work to be queued with different priorities, so
15105 that a big pile of slow low-priority jobs will not starve out
15106 higher priority jobs. This lays the groundwork for a fix for
15109 o Minor bugfixes (build system, rust):
15110 - Fix a problem where Rust toolchains were not being found when
15111 building without --enable-cargo-online-mode, due to setting the
15112 $HOME environment variable instead of $CARGO_HOME. Fixes bug
15113 22830; bugfix on 0.3.1.1-alpha. Fix by Chelsea Komlo.
15115 o Minor bugfixes (compatibility, zstd):
15116 - Write zstd epilogues correctly when the epilogue requires
15117 reallocation of the output buffer, even with zstd 1.3.0.
15118 (Previously, we worked on 1.2.0 and failed with 1.3.0). Fixes bug
15119 22927; bugfix on 0.3.1.1-alpha.
15121 o Minor bugfixes (compilation warnings):
15122 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug
15123 22915; bugfix on 0.2.8.1-alpha.
15124 - Fix warnings when building with libscrypt and openssl scrypt
15125 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
15126 - Compile correctly when both openssl 1.1.0 and libscrypt are
15127 detected. Previously this would cause an error. Fixes bug 22892;
15128 bugfix on 0.3.1.1-alpha.
15129 - When building with certain versions of the mingw C header files,
15130 avoid float-conversion warnings when calling the C functions
15131 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
15134 o Minor bugfixes (coverity build support):
15135 - Avoid Coverity build warnings related to our BUG() macro. By
15136 default, Coverity treats BUG() as the Linux kernel does: an
15137 instant abort(). We need to override that so our BUG() macro
15138 doesn't prevent Coverity from analyzing functions that use it.
15139 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
15141 o Minor bugfixes (directory authority):
15142 - When a directory authority rejects a descriptor or extrainfo with
15143 a given digest, mark that digest as undownloadable, so that we do
15144 not attempt to download it again over and over. We previously
15145 tried to avoid downloading such descriptors by other means, but we
15146 didn't notice if we accidentally downloaded one anyway. This
15147 behavior became problematic in 0.2.7.2-alpha, when authorities
15148 began pinning Ed25519 keys. Fixes bug 22349; bugfix
15151 o Minor bugfixes (error reporting, windows):
15152 - When formatting Windows error messages, use the English format to
15153 avoid codepage issues. Fixes bug 22520; bugfix on 0.1.2.8-alpha.
15156 o Minor bugfixes (file limits, osx):
15157 - When setting the maximum number of connections allowed by the OS,
15158 always allow some extra file descriptors for other files. Fixes
15159 bug 22797; bugfix on 0.2.0.10-alpha.
15161 o Minor bugfixes (linux seccomp2 sandbox):
15162 - Avoid a sandbox failure when trying to re-bind to a socket and
15163 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
15165 o Minor bugfixes (memory leaks):
15166 - Fix a small memory leak when validating a configuration that uses
15167 two or more AF_UNIX sockets for the same port type. Fixes bug
15168 23053; bugfix on 0.2.6.3-alpha. This is CID 1415725.
15170 o Minor bugfixes (unit tests):
15171 - test_consdiff_base64cmp would fail on OS X because while OS X
15172 follows the standard of (less than zero/zero/greater than zero),
15173 it doesn't follow the convention of (-1/0/+1). Make the test
15174 comply with the standard. Fixes bug 22870; bugfix on 0.3.1.1-alpha.
15175 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
15176 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
15179 Changes in version 0.3.1.4-alpha - 2017-06-29
15180 Tor 0.3.1.4-alpha fixes a path selection bug that would allow a client
15181 to use a guard that was in the same network family as a chosen exit
15182 relay. This is a security regression; all clients running earlier
15183 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9
15186 This release also fixes several other bugs introduced in 0.3.0.x
15187 and 0.3.1.x, including others that can affect bandwidth usage
15190 o New dependencies:
15191 - To build with zstd and lzma support, Tor now requires the
15192 pkg-config tool at build time. (This requirement was new in
15193 0.3.1.1-alpha, but was not noted at the time. Noting it here to
15194 close ticket 22623.)
15196 o Major bugfixes (path selection, security):
15197 - When choosing which guard to use for a circuit, avoid the exit's
15198 family along with the exit itself. Previously, the new guard
15199 selection logic avoided the exit, but did not consider its family.
15200 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
15201 006 and CVE-2017-0377.
15203 o Major bugfixes (compression, zstd):
15204 - Correctly detect a full buffer when decompressing a large zstd-
15205 compressed input. Previously, we would sometimes treat a full
15206 buffer as an error. Fixes bug 22628; bugfix on 0.3.1.1-alpha.
15208 o Major bugfixes (directory protocol):
15209 - Ensure that we send "304 Not modified" as HTTP status code when a
15210 client is attempting to fetch a consensus or consensus diff, and
15211 the best one we can send them is one they already have. Fixes bug
15212 22702; bugfix on 0.3.1.1-alpha.
15214 o Major bugfixes (entry guards):
15215 - When starting with an old consensus, do not add new entry guards
15216 unless the consensus is "reasonably live" (under 1 day old). Fixes
15217 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
15219 o Minor features (bug mitigation, diagnostics, logging):
15220 - Avoid an assertion failure, and log a better error message, when
15221 unable to remove a file from the consensus cache on Windows.
15222 Attempts to mitigate and diagnose bug 22752.
15224 o Minor features (geoip):
15225 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
15228 o Minor bugfixes (compression):
15229 - When compressing or decompressing a buffer, check for a failure to
15230 create a compression object. Fixes bug 22626; bugfix
15232 - When decompressing a buffer, check for extra data after the end of
15233 the compressed data. Fixes bug 22629; bugfix on 0.3.1.1-alpha.
15234 - When decompressing an object received over an anonymous directory
15235 connection, if we have already decompressed it using an acceptable
15236 compression method, do not reject it for looking like an
15237 unacceptable compression method. Fixes part of bug 22670; bugfix
15239 - When serving directory votes compressed with zlib, do not claim to
15240 have compressed them with zstd. Fixes bug 22669; bugfix
15242 - When spooling compressed data to an output buffer, don't try to
15243 spool more data when there is no more data to spool and we are not
15244 trying to flush the input. Previously, we would sometimes launch
15245 compression requests with nothing to do, which interferes with our
15246 22672 checks. Fixes bug 22719; bugfix on 0.2.0.16-alpha.
15248 o Minor bugfixes (defensive programming):
15249 - Detect and break out of infinite loops in our compression code. We
15250 don't think that any such loops exist now, but it's best to be
15251 safe. Closes ticket 22672.
15252 - Fix a memset() off the end of an array when packing cells. This
15253 bug should be harmless in practice, since the corrupted bytes are
15254 still in the same structure, and are always padding bytes,
15255 ignored, or immediately overwritten, depending on compiler
15256 behavior. Nevertheless, because the memset()'s purpose is to make
15257 sure that any other cell-handling bugs can't expose bytes to the
15258 network, we need to fix it. Fixes bug 22737; bugfix on
15259 0.2.4.11-alpha. Fixes CID 1401591.
15261 o Minor bugfixes (linux seccomp2 sandbox):
15262 - Permit the fchmod system call, to avoid crashing on startup when
15263 starting with the seccomp2 sandbox and an unexpected set of
15264 permissions on the data directory or its contents. Fixes bug
15265 22516; bugfix on 0.2.5.4-alpha.
15266 - Fix a crash in the LZMA module, when the sandbox was enabled, and
15267 liblzma would allocate more than 16 MB of memory. We solve this by
15268 bumping the mprotect() limit in the sandbox module from 16 MB to
15269 20 MB. Fixes bug 22751; bugfix on 0.3.1.1-alpha.
15271 o Minor bugfixes (logging):
15272 - When decompressing, do not warn if we fail to decompress using a
15273 compression method that we merely guessed. Fixes part of bug
15274 22670; bugfix on 0.1.1.14-alpha.
15275 - When decompressing, treat mismatch between content-encoding and
15276 actual compression type as a protocol warning. Fixes part of bug
15277 22670; bugfix on 0.1.1.9-alpha.
15278 - Downgrade "assigned_to_cpuworker failed" message to info-level
15279 severity. In every case that can reach it, either a better warning
15280 has already been logged, or no warning is warranted. Fixes bug
15281 22356; bugfix on 0.2.6.3-alpha.
15282 - Demote a warn that was caused by libevent delays to info if
15283 netflow padding is less than 4.5 seconds late, or to notice
15284 if it is more (4.5 seconds is the amount of time that a netflow
15285 record might be emitted after, if we chose the maximum timeout).
15286 Fixes bug 22212; bugfix on 0.3.1.1-alpha.
15288 o Minor bugfixes (process behavior):
15289 - When exiting because of an error, always exit with a nonzero exit
15290 status. Previously, we would fail to report an error in our exit
15291 status in cases related to __OwningControllerProcess failure,
15292 lockfile contention, and Ed25519 key initialization. Fixes bug
15293 22720; bugfix on versions 0.2.1.6-alpha, 0.2.2.28-beta, and
15294 0.2.7.2-alpha respectively. Reported by "f55jwk4f"; patch
15298 - Add a manpage description for the key-pinning-journal file. Closes
15300 - Correctly note that bandwidth accounting values are stored in the
15301 state file, and the bw_accounting file is now obsolete. Closes
15303 - Document more of the files in the Tor data directory, including
15304 cached-extrainfo, secret_onion_key{,_ntor}.old, hidserv-stats,
15305 approved-routers, sr-random, and diff-cache. Found while fixing
15309 Changes in version 0.3.0.9 - 2017-06-29
15310 Tor 0.3.0.9 fixes a path selection bug that would allow a client
15311 to use a guard that was in the same network family as a chosen exit
15312 relay. This is a security regression; all clients running earlier
15313 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9 or
15316 This release also backports several other bugfixes from the 0.3.1.x
15319 o Major bugfixes (path selection, security, backport from 0.3.1.4-alpha):
15320 - When choosing which guard to use for a circuit, avoid the exit's
15321 family along with the exit itself. Previously, the new guard
15322 selection logic avoided the exit, but did not consider its family.
15323 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
15324 006 and CVE-2017-0377.
15326 o Major bugfixes (entry guards, backport from 0.3.1.1-alpha):
15327 - Don't block bootstrapping when a primary bridge is offline and we
15328 can't get its descriptor. Fixes bug 22325; fixes one case of bug
15329 21969; bugfix on 0.3.0.3-alpha.
15331 o Major bugfixes (entry guards, backport from 0.3.1.4-alpha):
15332 - When starting with an old consensus, do not add new entry guards
15333 unless the consensus is "reasonably live" (under 1 day old). Fixes
15334 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
15336 o Minor features (geoip):
15337 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
15340 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
15341 - Reject version numbers with non-numeric prefixes (such as +, -, or
15342 whitespace). Disallowing whitespace prevents differential version
15343 parsing between POSIX-based and Windows platforms. Fixes bug 21507
15344 and part of 21508; bugfix on 0.0.8pre1.
15346 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
15347 - Permit the fchmod system call, to avoid crashing on startup when
15348 starting with the seccomp2 sandbox and an unexpected set of
15349 permissions on the data directory or its contents. Fixes bug
15350 22516; bugfix on 0.2.5.4-alpha.
15352 o Minor bugfixes (defensive programming, backport from 0.3.1.4-alpha):
15353 - Fix a memset() off the end of an array when packing cells. This
15354 bug should be harmless in practice, since the corrupted bytes are
15355 still in the same structure, and are always padding bytes,
15356 ignored, or immediately overwritten, depending on compiler
15357 behavior. Nevertheless, because the memset()'s purpose is to make
15358 sure that any other cell-handling bugs can't expose bytes to the
15359 network, we need to fix it. Fixes bug 22737; bugfix on
15360 0.2.4.11-alpha. Fixes CID 1401591.
15363 Changes in version 0.3.1.3-alpha - 2017-06-08
15364 Tor 0.3.1.3-alpha fixes a pair of bugs that would allow an attacker to
15365 remotely crash a hidden service with an assertion failure. Anyone
15366 running a hidden service should upgrade to this version, or to some
15367 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
15369 Tor 0.3.1.3-alpha also includes fixes for several key management bugs
15370 that sometimes made relays unreliable, as well as several other
15371 bugfixes described below.
15373 o Major bugfixes (hidden service, relay, security):
15374 - Fix a remotely triggerable assertion failure when a hidden service
15375 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
15376 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
15377 - Fix a remotely triggerable assertion failure caused by receiving a
15378 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15379 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15382 o Major bugfixes (relay, link handshake):
15383 - When performing the v3 link handshake on a TLS connection, report
15384 that we have the x509 certificate that we actually used on that
15385 connection, even if we have changed certificates since that
15386 connection was first opened. Previously, we would claim to have
15387 used our most recent x509 link certificate, which would sometimes
15388 make the link handshake fail. Fixes one case of bug 22460; bugfix
15391 o Major bugfixes (relays, key management):
15392 - Regenerate link and authentication certificates whenever the key
15393 that signs them changes; also, regenerate link certificates
15394 whenever the signed key changes. Previously, these processes were
15395 only weakly coupled, and we relays could (for minutes to hours)
15396 wind up with an inconsistent set of keys and certificates, which
15397 other relays would not accept. Fixes two cases of bug 22460;
15398 bugfix on 0.3.0.1-alpha.
15399 - When sending an Ed25519 signing->link certificate in a CERTS cell,
15400 send the certificate that matches the x509 certificate that we
15401 used on the TLS connection. Previously, there was a race condition
15402 if the TLS context rotated after we began the TLS handshake but
15403 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
15406 o Major bugfixes (torrc, crash):
15407 - Fix a crash bug when using %include in torrc. Fixes bug 22417;
15408 bugfix on 0.3.1.1-alpha. Patch by Daniel Pinto.
15410 o Minor features (code style):
15411 - Add "Falls through" comments to our codebase, in order to silence
15412 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
15413 Stieger. Closes ticket 22446.
15415 o Minor features (diagnostic):
15416 - Add logging messages to try to diagnose a rare bug that seems to
15417 generate RSA->Ed25519 cross-certificates dated in the 1970s. We
15418 think this is happening because of incorrect system clocks, but
15419 we'd like to know for certain. Diagnostic for bug 22466.
15421 o Minor bugfixes (correctness):
15422 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15423 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15425 o Minor bugfixes (directory protocol):
15426 - Check for libzstd >= 1.1, because older versions lack the
15427 necessary streaming API. Fixes bug 22413; bugfix on 0.3.1.1-alpha.
15429 o Minor bugfixes (link handshake):
15430 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
15431 months, and regenerate it when it is within one month of expiring.
15432 Previously, we had generated this certificate at startup with a
15433 ten-year lifetime, but that could lead to weird behavior when Tor
15434 was started with a grossly inaccurate clock. Mitigates bug 22466;
15435 mitigation on 0.3.0.1-alpha.
15437 o Minor bugfixes (storage directories):
15438 - Always check for underflows in the cached storage directory usage.
15439 If the usage does underflow, re-calculate it. Also, avoid a
15440 separate underflow when the usage is not known. Fixes bug 22424;
15441 bugfix on 0.3.1.1-alpha.
15443 o Minor bugfixes (unit tests):
15444 - The unit tests now pass on systems where localhost is misconfigured
15445 to some IPv4 address other than 127.0.0.1. Fixes bug 6298; bugfix
15449 - Clarify the manpage for the (deprecated) torify script. Closes
15452 Changes in version 0.3.0.8 - 2017-06-08
15453 Tor 0.3.0.8 fixes a pair of bugs that would allow an attacker to
15454 remotely crash a hidden service with an assertion failure. Anyone
15455 running a hidden service should upgrade to this version, or to some
15456 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
15458 Tor 0.3.0.8 also includes fixes for several key management bugs
15459 that sometimes made relays unreliable, as well as several other
15460 bugfixes described below.
15462 o Major bugfixes (hidden service, relay, security, backport
15463 from 0.3.1.3-alpha):
15464 - Fix a remotely triggerable assertion failure when a hidden service
15465 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
15466 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
15467 - Fix a remotely triggerable assertion failure caused by receiving a
15468 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15469 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15472 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
15473 - When performing the v3 link handshake on a TLS connection, report
15474 that we have the x509 certificate that we actually used on that
15475 connection, even if we have changed certificates since that
15476 connection was first opened. Previously, we would claim to have
15477 used our most recent x509 link certificate, which would sometimes
15478 make the link handshake fail. Fixes one case of bug 22460; bugfix
15481 o Major bugfixes (relays, key management, backport from 0.3.1.3-alpha):
15482 - Regenerate link and authentication certificates whenever the key
15483 that signs them changes; also, regenerate link certificates
15484 whenever the signed key changes. Previously, these processes were
15485 only weakly coupled, and we relays could (for minutes to hours)
15486 wind up with an inconsistent set of keys and certificates, which
15487 other relays would not accept. Fixes two cases of bug 22460;
15488 bugfix on 0.3.0.1-alpha.
15489 - When sending an Ed25519 signing->link certificate in a CERTS cell,
15490 send the certificate that matches the x509 certificate that we
15491 used on the TLS connection. Previously, there was a race condition
15492 if the TLS context rotated after we began the TLS handshake but
15493 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
15496 o Major bugfixes (hidden service v3, backport from 0.3.1.1-alpha):
15497 - Stop rejecting v3 hidden service descriptors because their size
15498 did not match an old padding rule. Fixes bug 22447; bugfix on
15501 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
15502 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15503 December 2016 (of which ~126 were still functional) with a list of
15504 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15505 2017. Resolves ticket 21564.
15507 o Minor bugfixes (configuration, backport from 0.3.1.1-alpha):
15508 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
15509 bug 22252; bugfix on 0.2.9.3-alpha.
15511 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
15512 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15513 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15515 o Minor bugfixes (link handshake, backport from 0.3.1.3-alpha):
15516 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
15517 months, and regenerate it when it is within one month of expiring.
15518 Previously, we had generated this certificate at startup with a
15519 ten-year lifetime, but that could lead to weird behavior when Tor
15520 was started with a grossly inaccurate clock. Mitigates bug 22466;
15521 mitigation on 0.3.0.1-alpha.
15523 o Minor bugfixes (memory leak, directory authority, backport from
15525 - When directory authorities reject a router descriptor due to
15526 keypinning, free the router descriptor rather than leaking the
15527 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
15530 Changes in version 0.2.9.11 - 2017-06-08
15531 Tor 0.2.9.11 backports a fix for a bug that would allow an attacker to
15532 remotely crash a hidden service with an assertion failure. Anyone
15533 running a hidden service should upgrade to this version, or to some
15534 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15535 are not affected by TROVE-2017-004.)
15537 Tor 0.2.9.11 also backports fixes for several key management bugs
15538 that sometimes made relays unreliable, as well as several other
15539 bugfixes described below.
15541 o Major bugfixes (hidden service, relay, security, backport
15542 from 0.3.1.3-alpha):
15543 - Fix a remotely triggerable assertion failure caused by receiving a
15544 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15545 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15548 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
15549 - When performing the v3 link handshake on a TLS connection, report
15550 that we have the x509 certificate that we actually used on that
15551 connection, even if we have changed certificates since that
15552 connection was first opened. Previously, we would claim to have
15553 used our most recent x509 link certificate, which would sometimes
15554 make the link handshake fail. Fixes one case of bug 22460; bugfix
15557 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
15558 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15559 December 2016 (of which ~126 were still functional) with a list of
15560 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15561 2017. Resolves ticket 21564.
15563 o Minor features (future-proofing, backport from 0.3.0.7):
15564 - Tor no longer refuses to download microdescriptors or descriptors if
15565 they are listed as "published in the future". This change will
15566 eventually allow us to stop listing meaningful "published" dates
15567 in microdescriptor consensuses, and thereby allow us to reduce the
15568 resources required to download consensus diffs by over 50%.
15569 Implements part of ticket 21642; implements part of proposal 275.
15571 o Minor features (directory authorities, backport from 0.3.0.4-rc)
15572 - Directory authorities now reject relays running versions
15573 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
15574 suffer from bug 20499 and don't keep their consensus cache
15575 up-to-date. Resolves ticket 20509.
15577 o Minor features (geoip):
15578 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15581 o Minor bugfixes (control port, backport from 0.3.0.6):
15582 - The GETINFO extra-info/digest/<digest> command was broken because
15583 of a wrong base16 decode return value check, introduced when
15584 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
15586 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
15587 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15588 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15590 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.0.7):
15591 - The getpid() system call is now permitted under the Linux seccomp2
15592 sandbox, to avoid crashing with versions of OpenSSL (and other
15593 libraries) that attempt to learn the process's PID by using the
15594 syscall rather than the VDSO code. Fixes bug 21943; bugfix
15597 o Minor bugfixes (memory leak, directory authority, backport
15598 from 0.3.1.2-alpha):
15599 - When directory authorities reject a router descriptor due to
15600 keypinning, free the router descriptor rather than leaking the
15601 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
15603 Changes in version 0.2.8.14 - 2017-06-08
15604 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
15605 remotely crash a hidden service with an assertion failure. Anyone
15606 running a hidden service should upgrade to this version, or to some
15607 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15608 are not affected by TROVE-2017-004.)
15610 o Major bugfixes (hidden service, relay, security):
15611 - Fix a remotely triggerable assertion failure caused by receiving a
15612 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15613 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15616 o Minor features (geoip):
15617 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15620 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
15621 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15622 December 2016 (of which ~126 were still functional) with a list of
15623 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15624 2017. Resolves ticket 21564.
15626 o Minor bugfixes (correctness):
15627 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15628 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15630 Changes in version 0.2.7.8 - 2017-06-08
15631 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
15632 remotely crash a hidden service with an assertion failure. Anyone
15633 running a hidden service should upgrade to this version, or to some
15634 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15635 are not affected by TROVE-2017-004.)
15637 o Major bugfixes (hidden service, relay, security):
15638 - Fix a remotely triggerable assertion failure caused by receiving a
15639 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15640 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15643 o Minor features (geoip):
15644 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15647 o Minor bugfixes (correctness):
15648 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15649 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15652 Changes in version 0.2.6.12 - 2017-06-08
15653 Tor 0.2.6.12 backports a fix for a bug that would allow an attacker to
15654 remotely crash a hidden service with an assertion failure. Anyone
15655 running a hidden service should upgrade to this version, or to some
15656 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15657 are not affected by TROVE-2017-004.)
15659 o Major bugfixes (hidden service, relay, security):
15660 - Fix a remotely triggerable assertion failure caused by receiving a
15661 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15662 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15665 o Minor features (geoip):
15666 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15669 o Minor bugfixes (correctness):
15670 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15671 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15673 Changes in version 0.2.5.14 - 2017-06-08
15674 Tor 0.2.5.14 backports a fix for a bug that would allow an attacker to
15675 remotely crash a hidden service with an assertion failure. Anyone
15676 running a hidden service should upgrade to this version, or to some
15677 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15678 are not affected by TROVE-2017-004.)
15680 o Major bugfixes (hidden service, relay, security):
15681 - Fix a remotely triggerable assertion failure caused by receiving a
15682 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15683 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15686 o Minor features (geoip):
15687 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15690 o Minor bugfixes (correctness):
15691 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15692 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15694 Changes in version 0.2.4.29 - 2017-06-08
15695 Tor 0.2.4.29 backports a fix for a bug that would allow an attacker to
15696 remotely crash a hidden service with an assertion failure. Anyone
15697 running a hidden service should upgrade to this version, or to some
15698 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15699 are not affected by TROVE-2017-004.)
15701 o Major bugfixes (hidden service, relay, security):
15702 - Fix a remotely triggerable assertion failure caused by receiving a
15703 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15704 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15707 o Minor features (geoip):
15708 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15711 o Minor bugfixes (correctness):
15712 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15713 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15716 Changes in version 0.3.1.2-alpha - 2017-05-26
15717 Tor 0.3.1.2-alpha is the second release in the 0.3.1.x series. It
15718 fixes a few bugs found while testing 0.3.1.1-alpha, including a
15719 memory corruption bug that affected relay stability.
15721 o Major bugfixes (crash, relay):
15722 - Fix a memory-corruption bug in relays that set MyFamily.
15723 Previously, they would double-free MyFamily elements when making
15724 the next descriptor or when changing their configuration. Fixes
15725 bug 22368; bugfix on 0.3.1.1-alpha.
15727 o Minor bugfixes (logging):
15728 - Log a better message when a directory authority replies to an
15729 upload with an unexpected status code. Fixes bug 11121; bugfix
15732 o Minor bugfixes (memory leak, directory authority):
15733 - When directory authorities reject a router descriptor due to
15734 keypinning, free the router descriptor rather than leaking the
15735 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
15738 Changes in version 0.3.1.1-alpha - 2017-05-22
15739 Tor 0.3.1.1-alpha is the first release in the 0.3.1.x series. It
15740 reduces the bandwidth usage for Tor's directory protocol, adds some
15741 basic padding to resist netflow-based traffic analysis and to serve as
15742 the basis of other padding in the future, and adds rust support to the
15745 It also contains numerous other small features and improvements to
15746 security, correctness, and performance.
15748 Below are the changes since 0.3.0.7.
15750 o Major features (directory protocol):
15751 - Tor relays and authorities can now serve clients an abbreviated
15752 version of the consensus document, containing only the changes
15753 since an older consensus document that the client holds. Clients
15754 now request these documents when available. When both client and
15755 server use this new protocol, they will use far less bandwidth (up
15756 to 94% less) to keep the client's consensus up-to-date. Implements
15757 proposal 140; closes ticket 13339. Based on work by Daniel Martí.
15758 - Tor can now compress directory traffic with lzma or with zstd
15759 compression algorithms, which can deliver better bandwidth
15760 performance. Because lzma is computationally expensive, it's only
15761 used for documents that can be compressed once and served many
15762 times. Support for these algorithms requires that tor is built
15763 with the libzstd and/or liblzma libraries available. Implements
15764 proposal 278; closes ticket 21662.
15765 - Relays now perform the more expensive compression operations, and
15766 consensus diff generation, in worker threads. This separation
15767 avoids delaying the main thread when a new consensus arrives.
15769 o Major features (experimental):
15770 - Tor can now build modules written in Rust. To turn this on, pass
15771 the "--enable-rust" flag to the configure script. It's not time to
15772 get excited yet: currently, there is no actual Rust functionality
15773 beyond some simple glue code, and a notice at startup to tell you
15774 that Rust is running. Still, we hope that programmers and
15775 packagers will try building Tor with Rust support, so that we can
15776 find issues and solve portability problems. Closes ticket 22106.
15778 o Major features (traffic analysis resistance):
15779 - Connections between clients and relays now send a padding cell in
15780 each direction every 1.5 to 9.5 seconds (tunable via consensus
15781 parameters). This padding will not resist specialized
15782 eavesdroppers, but it should be enough to make many ISPs' routine
15783 network flow logging less useful in traffic analysis against
15786 Padding is negotiated using Tor's link protocol, so both relays
15787 and clients must upgrade for this to take effect. Clients may
15788 still send padding despite the relay's version by setting
15789 ConnectionPadding 1 in torrc, and may disable padding by setting
15790 ConnectionPadding 0 in torrc. Padding may be minimized for mobile
15791 users with the torrc option ReducedConnectionPadding. Implements
15792 Proposal 251 and Section 2 of Proposal 254; closes ticket 16861.
15793 - Relays will publish 24 hour totals of padding and non-padding cell
15794 counts to their extra-info descriptors, unless PaddingStatistics 0
15795 is set in torrc. These 24 hour totals are also rounded to
15796 multiples of 10000.
15798 o Major bugfixes (connection usage):
15799 - We use NETINFO cells to try to determine if both relays involved
15800 in a connection will agree on the canonical status of that
15801 connection. We prefer the connections where this is the case for
15802 extend cells, and try to close connections where relays disagree
15803 on their canonical status early. Also, we now prefer the oldest
15804 valid connection for extend cells. These two changes should reduce
15805 the number of long-term connections that are kept open between
15806 relays. Fixes bug 17604; bugfix on 0.2.5.5-alpha.
15807 - Relays now log hourly statistics (look for
15808 "channel_check_for_duplicates" lines) on the total number of
15809 connections to other relays. If the number of connections per
15810 relay is unexpectedly large, this log message is at notice level.
15811 Otherwise it is at info.
15813 o Major bugfixes (entry guards):
15814 - Don't block bootstrapping when a primary bridge is offline and we
15815 can't get its descriptor. Fixes bug 22325; fixes one case of bug
15816 21969; bugfix on 0.3.0.3-alpha.
15818 o Major bugfixes (linux TPROXY support):
15819 - Fix a typo that had prevented TPROXY-based transparent proxying
15820 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
15821 Patch from "d4fq0fQAgoJ".
15823 o Minor features (security, windows):
15824 - Enable a couple of pieces of Windows hardening: one
15825 (HeapEnableTerminationOnCorruption) that has been on-by-default
15826 since Windows 8, and unavailable before Windows 7; and one
15827 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
15828 affect us, but shouldn't do any harm. Closes ticket 21953.
15830 o Minor features (config options):
15831 - Allow "%include" directives in torrc configuration files. These
15832 directives import the settings from other files, or from all the
15833 files in a directory. Closes ticket 1922. Code by Daniel Pinto.
15834 - Make SAVECONF return an error when overwriting a torrc that has
15835 includes. Using SAVECONF with the FORCE option will allow it to
15836 overwrite torrc even if includes are used. Related to ticket 1922.
15837 - Add "GETINFO config-can-saveconf" to tell controllers if SAVECONF
15838 will work without the FORCE option. Related to ticket 1922.
15840 o Minor features (controller):
15841 - Warn the first time that a controller requests data in the long-
15842 deprecated 'GETINFO network-status' format. Closes ticket 21703.
15844 o Minor features (defaults):
15845 - The default value for UseCreateFast is now 0: clients which
15846 haven't yet received a consensus document will now use a proper
15847 ntor handshake to talk to their directory servers whenever they
15848 can. Closes ticket 21407.
15849 - Onion key rotation and expiry intervals are now defined as a
15850 network consensus parameter, per proposal 274. The default
15851 lifetime of an onion key is increased from 7 to 28 days. Old onion
15852 keys will expire after 7 days by default. This change will make
15853 consensus diffs much smaller, and save significant bandwidth.
15854 Closes ticket 21641.
15856 o Minor features (fallback directory list):
15857 - Update the fallback directory mirror whitelist and blacklist based
15858 on operator emails. Closes task 21121.
15859 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15860 December 2016 (of which ~126 were still functional) with a list of
15861 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15862 2017. Resolves ticket 21564.
15864 o Minor features (hidden services, logging):
15865 - Log a message when a hidden service descriptor has fewer
15866 introduction points than specified in
15867 HiddenServiceNumIntroductionPoints. Closes tickets 21598.
15868 - Log a message when a hidden service reaches its introduction point
15869 circuit limit, and when that limit is reset. Follow up to ticket
15870 21594; closes ticket 21622.
15871 - Warn user if multiple entries in EntryNodes and at least one
15872 HiddenService are used together. Pinning EntryNodes along with a
15873 hidden service can be possibly harmful; for instance see ticket
15874 14917 or 21155. Closes ticket 21155.
15876 o Minor features (linux seccomp2 sandbox):
15877 - We now have a document storage backend compatible with the Linux
15878 seccomp2 sandbox. This backend is used for consensus documents and
15879 diffs between them; in the long term, we'd like to use it for
15880 unparseable directory material too. Closes ticket 21645
15881 - Increase the maximum allowed size passed to mprotect(PROT_WRITE)
15882 from 1MB to 16MB. This was necessary with the glibc allocator in
15883 order to allow worker threads to allocate more memory -- which in
15884 turn is necessary because of our new use of worker threads for
15885 compression. Closes ticket 22096.
15887 o Minor features (logging):
15888 - Log files are no longer created world-readable by default.
15889 (Previously, most distributors would store the logs in a non-
15890 world-readable location to prevent inappropriate access. This
15891 change is an extra precaution.) Closes ticket 21729; patch
15894 o Minor features (performance):
15895 - Our Keccak (SHA-3) implementation now accesses memory more
15896 efficiently, especially on little-endian systems. Closes
15898 - Add an O(1) implementation of channel_find_by_global_id(), to
15899 speed some controller functions.
15901 o Minor features (relay, configuration):
15902 - The MyFamily option may now be repeated as many times as desired,
15903 for relays that want to configure large families. Closes ticket
15904 4998; patch by Daniel Pinto.
15906 o Minor features (safety):
15907 - Add an explicit check to extrainfo_parse_entry_from_string() for
15908 NULL inputs. We don't believe this can actually happen, but it may
15909 help silence a warning from the Clang analyzer. Closes
15912 o Minor features (testing):
15913 - Add a "--disable-memory-sentinels" feature to help with fuzzing.
15914 When Tor is compiled with this option, we disable a number of
15915 redundant memory-safety failsafes that are intended to stop bugs
15916 from becoming security issues. This makes it easier to hunt for
15917 bugs that would be security issues without the failsafes turned
15918 on. Closes ticket 21439.
15919 - Add a general event-tracing instrumentation support to Tor. This
15920 subsystem will enable developers and researchers to add fine-
15921 grained instrumentation to their Tor instances, for use when
15922 examining Tor network performance issues. There are no trace
15923 events yet, and event-tracing is off by default unless enabled at
15924 compile time. Implements ticket 13802.
15925 - Improve our version parsing tests: add tests for typical version
15926 components, add tests for invalid versions, including numeric
15927 range and non-numeric prefixes. Unit tests 21278, 21450, and
15928 21507. Partially implements 21470.
15930 o Minor bugfixes (bandwidth accounting):
15931 - Roll over monthly accounting at the configured hour and minute,
15932 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
15933 Found by Andrey Karpov with PVS-Studio.
15935 o Minor bugfixes (code correctness):
15936 - Accurately identify client connections by their lack of peer
15937 authentication. This means that we bail out earlier if asked to
15938 extend to a client. Follow-up to 21407. Fixes bug 21406; bugfix
15941 o Minor bugfixes (configuration):
15942 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
15943 bug 22252; bugfix on 0.2.9.3-alpha.
15945 o Minor bugfixes (connection lifespan):
15946 - Allow more control over how long TLS connections are kept open:
15947 unify CircuitIdleTimeout and PredictedPortsRelevanceTime into a
15948 single option called CircuitsAvailableTimeout. Also, allow the
15949 consensus to control the default values for both this preference
15950 and the lifespan of relay-to-relay connections. Fixes bug 17592;
15951 bugfix on 0.2.5.5-alpha.
15952 - Increase the initial circuit build timeout testing frequency, to
15953 help ensure that ReducedConnectionPadding clients finish learning
15954 a timeout before their orconn would expire. The initial testing
15955 rate was set back in the days of TAP and before the Tor Browser
15956 updater, when we had to be much more careful about new clients
15957 making lots of circuits. With this change, a circuit build timeout
15958 is learned in about 15-20 minutes, instead of 100-120 minutes.
15960 o Minor bugfixes (controller):
15961 - GETINFO onions/current and onions/detached no longer respond with
15962 551 on empty lists. Fixes bug 21329; bugfix on 0.2.7.1-alpha.
15963 - Trigger HS descriptor events on the control port when the client
15964 fails to pick a hidden service directory for a hidden service.
15965 This can happen if all the hidden service directories are in
15966 ExcludeNodes, or they have all been queried within the last 15
15967 minutes. Fixes bug 22042; bugfix on 0.2.5.2-alpha.
15969 o Minor bugfixes (directory authority):
15970 - When rejecting a router descriptor for running an obsolete version
15971 of Tor without ntor support, warn about the obsolete tor version,
15972 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
15973 - Prevent the shared randomness subsystem from asserting when
15974 initialized by a bridge authority with an incomplete configuration
15975 file. Fixes bug 21586; bugfix on 0.2.9.8.
15977 o Minor bugfixes (exit-side DNS):
15978 - Fix an untriggerable assertion that checked the output of a
15979 libevent DNS error, so that the assertion actually behaves as
15980 expected. Fixes bug 22244; bugfix on 0.2.0.20-rc. Found by Andrey
15981 Karpov using PVS-Studio.
15983 o Minor bugfixes (fallback directories):
15984 - Make the usage example in updateFallbackDirs.py actually work, and
15985 explain what it does. Fixes bug 22270; bugfix on 0.3.0.3-alpha.
15986 - Decrease the guard flag average required to be a fallback. This
15987 allows us to keep relays that have their guard flag removed when
15988 they restart. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
15989 - Decrease the minimum number of fallbacks to 100. Fixes bug 20913;
15990 bugfix on 0.2.8.1-alpha.
15991 - Make sure fallback directory mirrors have the same address, port,
15992 and relay identity key for at least 30 days before they are
15993 selected. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
15995 o Minor bugfixes (hidden services):
15996 - Stop printing a cryptic warning when a hidden service gets a
15997 request to connect to a virtual port that it hasn't configured.
15998 Fixes bug 16706; bugfix on 0.2.6.3-alpha.
15999 - Simplify hidden service descriptor creation by using an existing
16000 flag to check if an introduction point is established. Fixes bug
16001 21599; bugfix on 0.2.7.2-alpha.
16003 o Minor bugfixes (memory leak):
16004 - Fix a small memory leak at exit from the backtrace handler code.
16005 Fixes bug 21788; bugfix on 0.2.5.2-alpha. Patch from Daniel Pinto.
16007 o Minor bugfixes (protocol, logging):
16008 - Downgrade a log statement about unexpected relay cells from "bug"
16009 to "protocol warning", because there is at least one use case
16010 where it can be triggered by a buggy tor implementation. Fixes bug
16011 21293; bugfix on 0.1.1.14-alpha.
16013 o Minor bugfixes (testing):
16014 - Use unbuffered I/O for utility functions around the
16015 process_handle_t type. This fixes unit test failures reported on
16016 OpenBSD and FreeBSD. Fixes bug 21654; bugfix on 0.2.3.1-alpha.
16017 - Make display of captured unit test log messages consistent. Fixes
16018 bug 21510; bugfix on 0.2.9.3-alpha.
16019 - Make test-network.sh always call chutney's test-network.sh.
16020 Previously, this only worked on systems which had bash installed,
16021 due to some bash-specific code in the script. Fixes bug 19699;
16022 bugfix on 0.3.0.4-rc. Follow-up to ticket 21581.
16024 o Minor bugfixes (voting consistency):
16025 - Reject version numbers with non-numeric prefixes (such as +, -, or
16026 whitespace). Disallowing whitespace prevents differential version
16027 parsing between POSIX-based and Windows platforms. Fixes bug 21507
16028 and part of 21508; bugfix on 0.0.8pre1.
16030 o Minor bugfixes (windows, relay):
16031 - Resolve "Failure from drain_fd: No error" warnings on Windows
16032 relays. Fixes bug 21540; bugfix on 0.2.6.3-alpha.
16034 o Code simplification and refactoring:
16035 - Break up the 630-line function connection_dir_client_reached_eof()
16036 into a dozen smaller functions. This change should help
16037 maintainability and readability of the client directory code.
16038 - Isolate our use of the openssl headers so that they are only
16039 included from our crypto wrapper modules, and from tests that
16040 examine those modules' internals. Closes ticket 21841.
16041 - Simplify our API to launch directory requests, making it more
16042 extensible and less error-prone. Now it's easier to add extra
16043 headers to directory requests. Closes ticket 21646.
16044 - Our base64 decoding functions no longer overestimate the output
16045 space that they need when parsing unpadded inputs. Closes
16047 - Remove unused "ROUTER_ADDED_NOTIFY_GENERATOR" internal value.
16048 Resolves ticket 22213.
16049 - The logic that directory caches use to spool request to clients,
16050 serving them one part at a time so as not to allocate too much
16051 memory, has been refactored for consistency. Previously there was
16052 a separate spooling implementation per type of spoolable data. Now
16053 there is one common spooling implementation, with extensible data
16054 types. Closes ticket 21651.
16055 - Tor's compression module now supports multiple backends. Part of
16056 the implementation for proposal 278; closes ticket 21663.
16059 - Clarify the behavior of the KeepAliveIsolateSOCKSAuth sub-option.
16060 Closes ticket 21873.
16061 - Correct documentation about the default DataDirectory value.
16062 Closes ticket 21151.
16063 - Document the default behavior of NumEntryGuards and
16064 NumDirectoryGuards correctly. Fixes bug 21715; bugfix
16066 - Document key=value pluggable transport arguments for Bridge lines
16067 in torrc. Fixes bug 20341; bugfix on 0.2.5.1-alpha.
16068 - Note that bandwidth-limiting options don't affect TCP headers or
16069 DNS. Closes ticket 17170.
16071 o Removed features (configuration options, all in ticket 22060):
16072 - These configuration options are now marked Obsolete, and no longer
16073 have any effect: AllowInvalidNodes, AllowSingleHopCircuits,
16074 AllowSingleHopExits, ExcludeSingleHopRelays, FastFirstHopPK,
16075 TLSECGroup, WarnUnsafeSocks. They were first marked as deprecated
16076 in 0.2.9.2-alpha and have now been removed. The previous default
16077 behavior is now always chosen; the previous (less secure) non-
16078 default behavior is now unavailable.
16079 - CloseHSClientCircuitsImmediatelyOnTimeout and
16080 CloseHSServiceRendCircuitsImmediatelyOnTimeout were deprecated in
16081 0.2.9.2-alpha and now have been removed. HS circuits never close
16082 on circuit build timeout; they have a longer timeout period.
16083 - {Control,DNS,Dir,Socks,Trans,NATD,OR}ListenAddress were deprecated
16084 in 0.2.9.2-alpha and now have been removed. Use the ORPort option
16085 (and others) to configure listen-only and advertise-only addresses.
16087 o Removed features (tools):
16088 - We've removed the tor-checkkey tool from src/tools. Long ago, we
16089 used it to help people detect RSA keys that were generated by
16090 versions of Debian affected by CVE-2008-0166. But those keys have
16091 been out of circulation for ages, and this tool is no longer
16092 required. Closes ticket 21842.
16095 Changes in version 0.3.0.7 - 2017-05-15
16096 Tor 0.3.0.7 fixes a medium-severity security bug in earlier versions
16097 of Tor 0.3.0.x, where an attacker could cause a Tor relay process
16098 to exit. Relays running earlier versions of Tor 0.3.0.x should upgrade;
16099 clients are not affected.
16101 o Major bugfixes (hidden service directory, security):
16102 - Fix an assertion failure in the hidden service directory code, which
16103 could be used by an attacker to remotely cause a Tor relay process to
16104 exit. Relays running earlier versions of Tor 0.3.0.x should upgrade.
16105 should upgrade. This security issue is tracked as TROVE-2017-002.
16106 Fixes bug 22246; bugfix on 0.3.0.1-alpha.
16109 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
16112 o Minor features (future-proofing):
16113 - Tor no longer refuses to download microdescriptors or descriptors
16114 if they are listed as "published in the future". This change will
16115 eventually allow us to stop listing meaningful "published" dates
16116 in microdescriptor consensuses, and thereby allow us to reduce the
16117 resources required to download consensus diffs by over 50%.
16118 Implements part of ticket 21642; implements part of proposal 275.
16120 o Minor bugfixes (Linux seccomp2 sandbox):
16121 - The getpid() system call is now permitted under the Linux seccomp2
16122 sandbox, to avoid crashing with versions of OpenSSL (and other
16123 libraries) that attempt to learn the process's PID by using the
16124 syscall rather than the VDSO code. Fixes bug 21943; bugfix
16128 Changes in version 0.3.0.6 - 2017-04-26
16129 Tor 0.3.0.6 is the first stable release of the Tor 0.3.0 series.
16131 With the 0.3.0 series, clients and relays now use Ed25519 keys to
16132 authenticate their link connections to relays, rather than the old
16133 RSA1024 keys that they used before. (Circuit crypto has been
16134 Curve25519-authenticated since 0.2.4.8-alpha.) We have also replaced
16135 the guard selection and replacement algorithm to behave more robustly
16136 in the presence of unreliable networks, and to resist guard-
16139 This series also includes numerous other small features and bugfixes,
16140 along with more groundwork for the upcoming hidden-services revamp.
16142 Per our stable release policy, we plan to support the Tor 0.3.0
16143 release series for at least the next nine months, or for three months
16144 after the first stable release of the 0.3.1 series: whichever is
16145 longer. If you need a release with long-term support, we recommend
16146 that you stay with the 0.2.9 series.
16148 Below are the changes since 0.3.0.5-rc. For a list of all changes
16149 since 0.2.9, see the ReleaseNotes file.
16151 o Minor features (geoip):
16152 - Update geoip and geoip6 to the April 4 2017 Maxmind GeoLite2
16155 o Minor bugfixes (control port):
16156 - The GETINFO extra-info/digest/<digest> command was broken because
16157 of a wrong base16 decode return value check, introduced when
16158 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
16160 o Minor bugfixes (crash prevention):
16161 - Fix a (currently untriggerable, but potentially dangerous) crash
16162 bug when base32-encoding inputs whose sizes are not a multiple of
16163 5. Fixes bug 21894; bugfix on 0.2.9.1-alpha.
16166 Changes in version 0.3.0.5-rc - 2017-04-05
16167 Tor 0.3.0.5-rc fixes a few remaining bugs, large and small, in the
16168 0.3.0 release series.
16170 This is the second release candidate in the Tor 0.3.0 series, and has
16171 much fewer changes than the first. If we find no new bugs or
16172 regressions here, the first stable 0.3.0 release will be nearly
16175 o Major bugfixes (crash, directory connections):
16176 - Fix a rare crash when sending a begin cell on a circuit whose
16177 linked directory connection had already been closed. Fixes bug
16178 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
16180 o Major bugfixes (guard selection):
16181 - Fix a guard selection bug where Tor would refuse to bootstrap in
16182 some cases if the user swapped a bridge for another bridge in
16183 their configuration file. Fixes bug 21771; bugfix on 0.3.0.1-alpha.
16184 Reported by "torvlnt33r".
16186 o Minor features (geoip):
16187 - Update geoip and geoip6 to the March 7 2017 Maxmind GeoLite2
16190 o Minor bugfix (compilation):
16191 - Fix a warning when compiling hs_service.c. Previously, it had no
16192 exported symbols when compiled for libor.a, resulting in a
16193 compilation warning from clang. Fixes bug 21825; bugfix
16196 o Minor bugfixes (hidden services):
16197 - Make hidden services check for failed intro point connections,
16198 even when they have exceeded their intro point creation limit.
16199 Fixes bug 21596; bugfix on 0.2.7.2-alpha. Reported by Alec Muffett.
16200 - Make hidden services with 8 to 10 introduction points check for
16201 failed circuits immediately after startup. Previously, they would
16202 wait for 5 minutes before performing their first checks. Fixes bug
16203 21594; bugfix on 0.2.3.9-alpha. Reported by Alec Muffett.
16205 o Minor bugfixes (memory leaks):
16206 - Fix a memory leak when using GETCONF on a port option. Fixes bug
16207 21682; bugfix on 0.3.0.3-alpha.
16209 o Minor bugfixes (relay):
16210 - Avoid a double-marked-circuit warning that could happen when we
16211 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
16214 o Minor bugfixes (tests):
16215 - Run the entry_guard_parse_from_state_full() test with the time set
16216 to a specific date. (The guard state that this test was parsing
16217 contained guards that had expired since the test was first
16218 written.) Fixes bug 21799; bugfix on 0.3.0.1-alpha.
16221 - Update the description of the directory server options in the
16222 manual page, to clarify that a relay no longer needs to set
16223 DirPort in order to be a directory cache. Closes ticket 21720.
16227 Changes in version 0.2.8.13 - 2017-03-03
16228 Tor 0.2.8.13 backports a security fix from later Tor
16229 releases. Anybody running Tor 0.2.8.12 or earlier should upgrade to this
16230 this release, if for some reason they cannot upgrade to a later
16231 release series, and if they build Tor with the --enable-expensive-hardening
16234 Note that support for Tor 0.2.8.x is ending next year: we will not issue
16235 any fixes for the Tor 0.2.8.x series after 1 Jan 2018. If you need
16236 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16238 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16239 - Fix an integer underflow bug when comparing malformed Tor
16240 versions. This bug could crash Tor when built with
16241 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16242 0.2.9.8, which were built with -ftrapv by default. In other cases
16243 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16244 on 0.0.8pre1. Found by OSS-Fuzz.
16246 o Minor features (geoip):
16247 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16251 Changes in version 0.2.7.7 - 2017-03-03
16252 Tor 0.2.7.7 backports a number of security fixes from later Tor
16253 releases. Anybody running Tor 0.2.7.6 or earlier should upgrade to
16254 this release, if for some reason they cannot upgrade to a later
16257 Note that support for Tor 0.2.7.x is ending this year: we will not issue
16258 any fixes for the Tor 0.2.7.x series after 1 August 2017. If you need
16259 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16261 o Directory authority changes (backport from 0.2.8.5-rc):
16262 - Urras is no longer a directory authority. Closes ticket 19271.
16264 o Directory authority changes (backport from 0.2.9.2-alpha):
16265 - The "Tonga" bridge authority has been retired; the new bridge
16266 authority is "Bifroest". Closes tickets 19728 and 19690.
16268 o Directory authority key updates (backport from 0.2.8.1-alpha):
16269 - Update the V3 identity key for the dannenberg directory authority:
16270 it was changed on 18 November 2015. Closes task 17906. Patch
16273 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16274 - Fix a bug in parsing that could cause clients to read a single
16275 byte past the end of an allocated region. This bug could be used
16276 to cause hardened clients (built with --enable-expensive-hardening)
16277 to crash if they tried to visit a hostile hidden service. Non-
16278 hardened clients are only affected depending on the details of
16279 their platform's memory allocator. Fixes bug 21018; bugfix on
16280 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16281 2016-12-002 and as CVE-2016-1254.
16283 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
16284 - Stop a crash that could occur when a client running with DNSPort
16285 received a query with multiple address types, and the first
16286 address type was not supported. Found and fixed by Scott Dial.
16287 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
16288 - Prevent a class of security bugs caused by treating the contents
16289 of a buffer chunk as if they were a NUL-terminated string. At
16290 least one such bug seems to be present in all currently used
16291 versions of Tor, and would allow an attacker to remotely crash
16292 most Tor instances, especially those compiled with extra compiler
16293 hardening. With this defense in place, such bugs can't crash Tor,
16294 though we should still fix them as they occur. Closes ticket
16295 20384 (TROVE-2016-10-001).
16297 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16298 - Avoid a difficult-to-trigger heap corruption attack when extending
16299 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16300 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16301 Reported by Guido Vranken.
16303 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16304 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16305 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16307 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16308 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16309 pointer to the previous (uninitialized) key value. The impact here
16310 should be limited to a difficult-to-trigger crash, if OpenSSL is
16311 running an engine that makes key generation failures possible, or
16312 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16313 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16316 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16317 - Fix an integer underflow bug when comparing malformed Tor
16318 versions. This bug could crash Tor when built with
16319 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16320 0.2.9.8, which were built with -ftrapv by default. In other cases
16321 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16322 on 0.0.8pre1. Found by OSS-Fuzz.
16324 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16325 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16326 zero size. Check size argument to memwipe() for underflow. Fixes
16327 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16330 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16331 - Make Tor survive errors involving connections without a
16332 corresponding event object. Previously we'd fail with an
16333 assertion; now we produce a log message. Related to bug 16248.
16335 o Minor features (geoip):
16336 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16340 Changes in version 0.2.6.11 - 2017-03-03
16341 Tor 0.2.6.11 backports a number of security fixes from later Tor
16342 releases. Anybody running Tor 0.2.6.10 or earlier should upgrade to
16343 this release, if for some reason they cannot upgrade to a later
16346 Note that support for Tor 0.2.6.x is ending this year: we will not issue
16347 any fixes for the Tor 0.2.6.x series after 1 August 2017. If you need
16348 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16350 o Directory authority changes (backport from 0.2.8.5-rc):
16351 - Urras is no longer a directory authority. Closes ticket 19271.
16353 o Directory authority changes (backport from 0.2.9.2-alpha):
16354 - The "Tonga" bridge authority has been retired; the new bridge
16355 authority is "Bifroest". Closes tickets 19728 and 19690.
16357 o Directory authority key updates (backport from 0.2.8.1-alpha):
16358 - Update the V3 identity key for the dannenberg directory authority:
16359 it was changed on 18 November 2015. Closes task 17906. Patch
16362 o Major features (security fixes, backport from 0.2.9.4-alpha):
16363 - Prevent a class of security bugs caused by treating the contents
16364 of a buffer chunk as if they were a NUL-terminated string. At
16365 least one such bug seems to be present in all currently used
16366 versions of Tor, and would allow an attacker to remotely crash
16367 most Tor instances, especially those compiled with extra compiler
16368 hardening. With this defense in place, such bugs can't crash Tor,
16369 though we should still fix them as they occur. Closes ticket
16370 20384 (TROVE-2016-10-001).
16372 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16373 - Fix a bug in parsing that could cause clients to read a single
16374 byte past the end of an allocated region. This bug could be used
16375 to cause hardened clients (built with --enable-expensive-hardening)
16376 to crash if they tried to visit a hostile hidden service. Non-
16377 hardened clients are only affected depending on the details of
16378 their platform's memory allocator. Fixes bug 21018; bugfix on
16379 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16380 2016-12-002 and as CVE-2016-1254.
16382 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
16383 - Stop a crash that could occur when a client running with DNSPort
16384 received a query with multiple address types, and the first
16385 address type was not supported. Found and fixed by Scott Dial.
16386 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
16388 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
16389 - Fix an error that could cause us to read 4 bytes before the
16390 beginning of an openssl string. This bug could be used to cause
16391 Tor to crash on systems with unusual malloc implementations, or
16392 systems with unusual hardening installed. Fixes bug 17404; bugfix
16395 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16396 - Avoid a difficult-to-trigger heap corruption attack when extending
16397 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16398 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16399 Reported by Guido Vranken.
16401 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16402 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16403 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16405 o Major bugfixes (guard selection, backport from 0.2.7.6):
16406 - Actually look at the Guard flag when selecting a new directory
16407 guard. When we implemented the directory guard design, we
16408 accidentally started treating all relays as if they have the Guard
16409 flag during guard selection, leading to weaker anonymity and worse
16410 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
16413 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16414 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16415 pointer to the previous (uninitialized) key value. The impact here
16416 should be limited to a difficult-to-trigger crash, if OpenSSL is
16417 running an engine that makes key generation failures possible, or
16418 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16419 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16422 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16423 - Fix an integer underflow bug when comparing malformed Tor
16424 versions. This bug could crash Tor when built with
16425 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16426 0.2.9.8, which were built with -ftrapv by default. In other cases
16427 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16428 on 0.0.8pre1. Found by OSS-Fuzz.
16430 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16431 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16432 zero size. Check size argument to memwipe() for underflow. Fixes
16433 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16436 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16437 - Make Tor survive errors involving connections without a
16438 corresponding event object. Previously we'd fail with an
16439 assertion; now we produce a log message. Related to bug 16248.
16441 o Minor features (geoip):
16442 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16445 o Minor bugfixes (compilation, backport from 0.2.7.6):
16446 - Fix a compilation warning with Clang 3.6: Do not check the
16447 presence of an address which can never be NULL. Fixes bug 17781.
16450 Changes in version 0.2.5.13 - 2017-03-03
16451 Tor 0.2.5.13 backports a number of security fixes from later Tor
16452 releases. Anybody running Tor 0.2.5.13 or earlier should upgrade to
16453 this release, if for some reason they cannot upgrade to a later
16456 Note that support for Tor 0.2.5.x is ending next year: we will not issue
16457 any fixes for the Tor 0.2.5.x series after 1 May 2018. If you need
16458 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16460 o Directory authority changes (backport from 0.2.8.5-rc):
16461 - Urras is no longer a directory authority. Closes ticket 19271.
16463 o Directory authority changes (backport from 0.2.9.2-alpha):
16464 - The "Tonga" bridge authority has been retired; the new bridge
16465 authority is "Bifroest". Closes tickets 19728 and 19690.
16467 o Directory authority key updates (backport from 0.2.8.1-alpha):
16468 - Update the V3 identity key for the dannenberg directory authority:
16469 it was changed on 18 November 2015. Closes task 17906. Patch
16472 o Major features (security fixes, backport from 0.2.9.4-alpha):
16473 - Prevent a class of security bugs caused by treating the contents
16474 of a buffer chunk as if they were a NUL-terminated string. At
16475 least one such bug seems to be present in all currently used
16476 versions of Tor, and would allow an attacker to remotely crash
16477 most Tor instances, especially those compiled with extra compiler
16478 hardening. With this defense in place, such bugs can't crash Tor,
16479 though we should still fix them as they occur. Closes ticket
16480 20384 (TROVE-2016-10-001).
16482 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16483 - Fix a bug in parsing that could cause clients to read a single
16484 byte past the end of an allocated region. This bug could be used
16485 to cause hardened clients (built with --enable-expensive-hardening)
16486 to crash if they tried to visit a hostile hidden service. Non-
16487 hardened clients are only affected depending on the details of
16488 their platform's memory allocator. Fixes bug 21018; bugfix on
16489 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16490 2016-12-002 and as CVE-2016-1254.
16492 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
16493 - Stop a crash that could occur when a client running with DNSPort
16494 received a query with multiple address types, and the first
16495 address type was not supported. Found and fixed by Scott Dial.
16496 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
16498 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
16499 - Fix an error that could cause us to read 4 bytes before the
16500 beginning of an openssl string. This bug could be used to cause
16501 Tor to crash on systems with unusual malloc implementations, or
16502 systems with unusual hardening installed. Fixes bug 17404; bugfix
16505 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16506 - Avoid a difficult-to-trigger heap corruption attack when extending
16507 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16508 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16509 Reported by Guido Vranken.
16511 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16512 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16513 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16515 o Major bugfixes (guard selection, backport from 0.2.7.6):
16516 - Actually look at the Guard flag when selecting a new directory
16517 guard. When we implemented the directory guard design, we
16518 accidentally started treating all relays as if they have the Guard
16519 flag during guard selection, leading to weaker anonymity and worse
16520 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
16523 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16524 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16525 pointer to the previous (uninitialized) key value. The impact here
16526 should be limited to a difficult-to-trigger crash, if OpenSSL is
16527 running an engine that makes key generation failures possible, or
16528 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16529 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16532 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16533 - Fix an integer underflow bug when comparing malformed Tor
16534 versions. This bug could crash Tor when built with
16535 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16536 0.2.9.8, which were built with -ftrapv by default. In other cases
16537 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16538 on 0.0.8pre1. Found by OSS-Fuzz.
16540 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16541 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16542 zero size. Check size argument to memwipe() for underflow. Fixes
16543 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16546 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16547 - Make Tor survive errors involving connections without a
16548 corresponding event object. Previously we'd fail with an
16549 assertion; now we produce a log message. Related to bug 16248.
16551 o Minor features (geoip):
16552 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16555 o Minor bugfixes (compilation, backport from 0.2.7.6):
16556 - Fix a compilation warning with Clang 3.6: Do not check the
16557 presence of an address which can never be NULL. Fixes bug 17781.
16559 o Minor bugfixes (crypto error-handling, backport from 0.2.7.2-alpha):
16560 - Check for failures from crypto_early_init, and refuse to continue.
16561 A previous typo meant that we could keep going with an
16562 uninitialized crypto library, and would have OpenSSL initialize
16563 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
16564 when implementing ticket 4900. Patch by "teor".
16566 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
16567 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
16568 a client authorized hidden service. Fixes bug 15823; bugfix
16572 Changes in version 0.2.4.28 - 2017-03-03
16573 Tor 0.2.4.28 backports a number of security fixes from later Tor
16574 releases. Anybody running Tor 0.2.4.27 or earlier should upgrade to
16575 this release, if for some reason they cannot upgrade to a later
16578 Note that support for Tor 0.2.4.x is ending soon: we will not issue
16579 any fixes for the Tor 0.2.4.x series after 1 August 2017. If you need
16580 a Tor release series with long-term support, we recommend Tor 0.2.9.x.
16582 o Directory authority changes (backport from 0.2.8.5-rc):
16583 - Urras is no longer a directory authority. Closes ticket 19271.
16585 o Directory authority changes (backport from 0.2.9.2-alpha):
16586 - The "Tonga" bridge authority has been retired; the new bridge
16587 authority is "Bifroest". Closes tickets 19728 and 19690.
16589 o Directory authority key updates (backport from 0.2.8.1-alpha):
16590 - Update the V3 identity key for the dannenberg directory authority:
16591 it was changed on 18 November 2015. Closes task 17906. Patch
16594 o Major features (security fixes, backport from 0.2.9.4-alpha):
16595 - Prevent a class of security bugs caused by treating the contents
16596 of a buffer chunk as if they were a NUL-terminated string. At
16597 least one such bug seems to be present in all currently used
16598 versions of Tor, and would allow an attacker to remotely crash
16599 most Tor instances, especially those compiled with extra compiler
16600 hardening. With this defense in place, such bugs can't crash Tor,
16601 though we should still fix them as they occur. Closes ticket
16602 20384 (TROVE-2016-10-001).
16604 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16605 - Fix a bug in parsing that could cause clients to read a single
16606 byte past the end of an allocated region. This bug could be used
16607 to cause hardened clients (built with --enable-expensive-hardening)
16608 to crash if they tried to visit a hostile hidden service. Non-
16609 hardened clients are only affected depending on the details of
16610 their platform's memory allocator. Fixes bug 21018; bugfix on
16611 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16612 2016-12-002 and as CVE-2016-1254.
16614 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
16615 - Fix an error that could cause us to read 4 bytes before the
16616 beginning of an openssl string. This bug could be used to cause
16617 Tor to crash on systems with unusual malloc implementations, or
16618 systems with unusual hardening installed. Fixes bug 17404; bugfix
16621 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16622 - Avoid a difficult-to-trigger heap corruption attack when extending
16623 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16624 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16625 Reported by Guido Vranken.
16627 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16628 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16629 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16631 o Major bugfixes (guard selection, backport from 0.2.7.6):
16632 - Actually look at the Guard flag when selecting a new directory
16633 guard. When we implemented the directory guard design, we
16634 accidentally started treating all relays as if they have the Guard
16635 flag during guard selection, leading to weaker anonymity and worse
16636 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
16639 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16640 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16641 pointer to the previous (uninitialized) key value. The impact here
16642 should be limited to a difficult-to-trigger crash, if OpenSSL is
16643 running an engine that makes key generation failures possible, or
16644 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16645 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16648 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16649 - Fix an integer underflow bug when comparing malformed Tor
16650 versions. This bug could crash Tor when built with
16651 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16652 0.2.9.8, which were built with -ftrapv by default. In other cases
16653 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16654 on 0.0.8pre1. Found by OSS-Fuzz.
16656 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16657 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16658 zero size. Check size argument to memwipe() for underflow. Fixes
16659 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16662 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16663 - Make Tor survive errors involving connections without a
16664 corresponding event object. Previously we'd fail with an
16665 assertion; now we produce a log message. Related to bug 16248.
16667 o Minor features (DoS-resistance, backport from 0.2.7.1-alpha):
16668 - Make it harder for attackers to overload hidden services with
16669 introductions, by blocking multiple introduction requests on the
16670 same circuit. Resolves ticket 15515.
16672 o Minor features (geoip):
16673 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16676 o Minor bugfixes (compilation, backport from 0.2.7.6):
16677 - Fix a compilation warning with Clang 3.6: Do not check the
16678 presence of an address which can never be NULL. Fixes bug 17781.
16680 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
16681 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
16682 a client authorized hidden service. Fixes bug 15823; bugfix
16686 Changes in version 0.3.0.4-rc - 2017-03-01
16687 Tor 0.3.0.4-rc fixes some remaining bugs, large and small, in the
16688 0.3.0 release series, and introduces a few reliability features to
16689 keep them from coming back.
16691 This is the first release candidate in the Tor 0.3.0 series. If we
16692 find no new bugs or regressions here, the first stable 0.3.0 release
16693 will be nearly identical to it.
16695 o Major bugfixes (bridges):
16696 - When the same bridge is configured multiple times with the same
16697 identity, but at different address:port combinations, treat those
16698 bridge instances as separate guards. This fix restores the ability
16699 of clients to configure the same bridge with multiple pluggable
16700 transports. Fixes bug 21027; bugfix on 0.3.0.1-alpha.
16702 o Major bugfixes (hidden service directory v3):
16703 - Stop crashing on a failed v3 hidden service descriptor lookup
16704 failure. Fixes bug 21471; bugfixes on 0.3.0.1-alpha.
16706 o Major bugfixes (parsing):
16707 - When parsing a malformed content-length field from an HTTP
16708 message, do not read off the end of the buffer. This bug was a
16709 potential remote denial-of-service attack against Tor clients and
16710 relays. A workaround was released in October 2016, to prevent this
16711 bug from crashing Tor. This is a fix for the underlying issue,
16712 which should no longer matter (if you applied the earlier patch).
16713 Fixes bug 20894; bugfix on 0.2.0.16-alpha. Bug found by fuzzing
16714 using AFL (http://lcamtuf.coredump.cx/afl/).
16715 - Fix an integer underflow bug when comparing malformed Tor
16716 versions. This bug could crash Tor when built with
16717 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16718 0.2.9.8, which were built with -ftrapv by default. In other cases
16719 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16720 on 0.0.8pre1. Found by OSS-Fuzz.
16722 o Minor feature (protocol versioning):
16723 - Add new protocol version for proposal 224. HSIntro now advertises
16724 version "3-4" and HSDir version "1-2". Fixes ticket 20656.
16726 o Minor features (directory authorities):
16727 - Directory authorities now reject descriptors that claim to be
16728 malformed versions of Tor. Helps prevent exploitation of
16730 - Reject version numbers with components that exceed INT32_MAX.
16731 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
16732 Fixes bug 21450; bugfix on 0.0.8pre1.
16733 - Directory authorities now reject relays running versions
16734 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
16735 suffer from bug 20499 and don't keep their consensus cache
16736 up-to-date. Resolves ticket 20509.
16738 o Minor features (geoip):
16739 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16742 o Minor features (reliability, crash):
16743 - Try better to detect problems in buffers where they might grow (or
16744 think they have grown) over 2 GB in size. Diagnostic for
16747 o Minor features (testing):
16748 - During 'make test-network-all', if tor logs any warnings, ask
16749 chutney to output them. Requires a recent version of chutney with
16750 the 21572 patch. Implements 21570.
16752 o Minor bugfixes (certificate expiration time):
16753 - Avoid using link certificates that don't become valid till some
16754 time in the future. Fixes bug 21420; bugfix on 0.2.4.11-alpha
16756 o Minor bugfixes (code correctness):
16757 - Repair a couple of (unreachable or harmless) cases of the risky
16758 comparison-by-subtraction pattern that caused bug 21278.
16759 - Remove a redundant check for the UseEntryGuards option from the
16760 options_transition_affects_guards() function. Fixes bug 21492;
16761 bugfix on 0.3.0.1-alpha.
16763 o Minor bugfixes (directory mirrors):
16764 - Allow relays to use directory mirrors without a DirPort: these
16765 relays need to be contacted over their ORPorts using a begindir
16766 connection. Fixes one case of bug 20711; bugfix on 0.2.8.2-alpha.
16767 - Clarify the message logged when a remote relay is unexpectedly
16768 missing an ORPort or DirPort: users were confusing this with a
16769 local port. Fixes another case of bug 20711; bugfix
16772 o Minor bugfixes (guards):
16773 - Don't warn about a missing guard state on timeout-measurement
16774 circuits: they aren't supposed to be using guards. Fixes an
16775 instance of bug 21007; bugfix on 0.3.0.1-alpha.
16776 - Silence a BUG() warning when attempting to use a guard whose
16777 descriptor we don't know, and make this scenario less likely to
16778 happen. Fixes bug 21415; bugfix on 0.3.0.1-alpha.
16780 o Minor bugfixes (hidden service):
16781 - Pass correct buffer length when encoding legacy ESTABLISH_INTRO
16782 cells. Previously, we were using sizeof() on a pointer, instead of
16783 the real destination buffer. Fortunately, that value was only used
16784 to double-check that there was enough room--which was already
16785 enforced elsewhere. Fixes bug 21553; bugfix on 0.3.0.1-alpha.
16787 o Minor bugfixes (testing):
16788 - Fix Raspbian build issues related to missing socket errno in
16789 test_util.c. Fixes bug 21116; bugfix on 0.2.8.2. Patch
16791 - Rename "make fuzz" to "make test-fuzz-corpora", since it doesn't
16792 actually fuzz anything. Fixes bug 21447; bugfix on 0.3.0.3-alpha.
16793 - Use bash in src/test/test-network.sh. This ensures we reliably
16794 call chutney's newer tools/test-network.sh when available. Fixes
16795 bug 21562; bugfix on 0.2.9.1-alpha.
16798 - Small fixes to the fuzzing documentation. Closes ticket 21472.
16801 Changes in version 0.2.9.10 - 2017-03-01
16802 Tor 0.2.9.10 backports a security fix from later Tor release. It also
16803 includes fixes for some major issues affecting directory authorities,
16804 LibreSSL compatibility, and IPv6 correctness.
16806 The Tor 0.2.9.x release series is now marked as a long-term-support
16807 series. We intend to backport security fixes to 0.2.9.x until at
16808 least January of 2020.
16810 o Major bugfixes (directory authority, 0.3.0.3-alpha):
16811 - During voting, when marking a relay as a probable sybil, do not
16812 clear its BadExit flag: sybils can still be bad in other ways
16813 too. (We still clear the other flags.) Fixes bug 21108; bugfix
16816 o Major bugfixes (IPv6 Exits, backport from 0.3.0.3-alpha):
16817 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
16818 any IPv6 addresses. Instead, only reject a port over IPv6 if the
16819 exit policy rejects that port on more than an IPv6 /16 of
16820 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
16821 which rejected a relay's own IPv6 address by default. Fixes bug
16822 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
16824 o Major bugfixes (parsing, also in 0.3.0.4-rc):
16825 - Fix an integer underflow bug when comparing malformed Tor
16826 versions. This bug could crash Tor when built with
16827 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16828 0.2.9.8, which were built with -ftrapv by default. In other cases
16829 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16830 on 0.0.8pre1. Found by OSS-Fuzz.
16832 o Minor features (directory authorities, also in 0.3.0.4-rc):
16833 - Directory authorities now reject descriptors that claim to be
16834 malformed versions of Tor. Helps prevent exploitation of
16836 - Reject version numbers with components that exceed INT32_MAX.
16837 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
16838 Fixes bug 21450; bugfix on 0.0.8pre1.
16840 o Minor features (geoip):
16841 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16844 o Minor features (portability, compilation, backport from 0.3.0.3-alpha):
16845 - Autoconf now checks to determine if OpenSSL structures are opaque,
16846 instead of explicitly checking for OpenSSL version numbers. Part
16848 - Support building with recent LibreSSL code that uses opaque
16849 structures. Closes ticket 21359.
16851 o Minor bugfixes (code correctness, also in 0.3.0.4-rc):
16852 - Repair a couple of (unreachable or harmless) cases of the risky
16853 comparison-by-subtraction pattern that caused bug 21278.
16855 o Minor bugfixes (tor-resolve, backport from 0.3.0.3-alpha):
16856 - The tor-resolve command line tool now rejects hostnames over 255
16857 characters in length. Previously, it would silently truncate them,
16858 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
16859 Patch by "junglefowl".
16862 Changes in version 0.3.0.3-alpha - 2017-02-03
16863 Tor 0.3.0.3-alpha fixes a few significant bugs introduced over the
16864 0.3.0.x development series, including some that could cause
16865 authorities to behave badly. There is also a fix for a longstanding
16866 bug that could prevent IPv6 exits from working. Tor 0.3.0.3-alpha also
16867 includes some smaller features and bugfixes.
16869 The Tor 0.3.0.x release series is now in patch-freeze: no additional
16870 features will be considered for inclusion in 0.3.0.x. We suspect that
16871 some bugs will probably remain, however, and we encourage people to
16874 o Major bugfixes (directory authority):
16875 - During voting, when marking a relay as a probable sybil, do not
16876 clear its BadExit flag: sybils can still be bad in other ways
16877 too. (We still clear the other flags.) Fixes bug 21108; bugfix
16879 - When deciding whether we have just found a router to be reachable,
16880 do not penalize it for not having performed an Ed25519 link
16881 handshake if it does not claim to support an Ed25519 handshake.
16882 Previously, we would treat such relays as non-running. Fixes bug
16883 21107; bugfix on 0.3.0.1-alpha.
16885 o Major bugfixes (entry guards):
16886 - Stop trying to build circuits through entry guards for which we
16887 have no descriptor. Also, stop crashing in the case that we *do*
16888 accidentally try to build a circuit in such a state. Fixes bug
16889 21242; bugfix on 0.3.0.1-alpha.
16891 o Major bugfixes (IPv6 Exits):
16892 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
16893 any IPv6 addresses. Instead, only reject a port over IPv6 if the
16894 exit policy rejects that port on more than an IPv6 /16 of
16895 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
16896 which rejected a relay's own IPv6 address by default. Fixes bug
16897 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
16899 o Minor feature (client):
16900 - Enable IPv6 traffic on the SocksPort by default. To disable this,
16901 a user will have to specify "NoIPv6Traffic". Closes ticket 21269.
16903 o Minor feature (fallback scripts):
16904 - Add a check_existing mode to updateFallbackDirs.py, which checks
16905 if fallbacks in the hard-coded list are working. Closes ticket
16906 20174. Patch by haxxpop.
16908 o Minor features (ciphersuite selection):
16909 - Clients now advertise a list of ciphersuites closer to the ones
16910 preferred by Firefox. Closes part of ticket 15426.
16911 - Allow relays to accept a wider range of ciphersuites, including
16912 chacha20-poly1305 and AES-CCM. Closes the other part of 15426.
16914 o Minor features (controller, configuration):
16915 - Each of the *Port options, such as SocksPort, ORPort, ControlPort,
16916 and so on, now comes with a __*Port variant that will not be saved
16917 to the torrc file by the controller's SAVECONF command. This
16918 change allows TorBrowser to set up a single-use domain socket for
16919 each time it launches Tor. Closes ticket 20956.
16920 - The GETCONF command can now query options that may only be
16921 meaningful in context-sensitive lists. This allows the controller
16922 to query the mixed SocksPort/__SocksPort style options introduced
16923 in feature 20956. Implements ticket 21300.
16925 o Minor features (portability, compilation):
16926 - Autoconf now checks to determine if OpenSSL structures are opaque,
16927 instead of explicitly checking for OpenSSL version numbers. Part
16929 - Support building with recent LibreSSL code that uses opaque
16930 structures. Closes ticket 21359.
16932 o Minor features (relay):
16933 - We now allow separation of exit and relay traffic to different
16934 source IP addresses, using the OutboundBindAddressExit and
16935 OutboundBindAddressOR options respectively. Closes ticket 17975.
16936 Written by Michael Sonntag.
16938 o Minor bugfix (logging):
16939 - Don't recommend the use of Tor2web in non-anonymous mode.
16940 Recommending Tor2web is a bad idea because the client loses all
16941 anonymity. Tor2web should only be used in specific cases by users
16942 who *know* and understand the issues. Fixes bug 21294; bugfix
16945 o Minor bugfixes (client):
16946 - Always recover from failures in extend_info_from_node(), in an
16947 attempt to prevent any recurrence of bug 21242. Fixes bug 21372;
16948 bugfix on 0.2.3.1-alpha.
16950 o Minor bugfixes (client, entry guards):
16951 - Fix a bug warning (with backtrace) when we fail a channel that
16952 circuits to fallback directories on it. Fixes bug 21128; bugfix
16954 - Fix a spurious bug warning (with backtrace) when removing an
16955 expired entry guard. Fixes bug 21129; bugfix on 0.3.0.1-alpha.
16956 - Fix a bug of the new guard algorithm where tor could stall for up
16957 to 10 minutes before retrying a guard after a long period of no
16958 network. Fixes bug 21052; bugfix on 0.3.0.1-alpha.
16959 - Do not try to build circuits until we have descriptors for our
16960 primary entry guards. Related to fix for bug 21242.
16962 o Minor bugfixes (configure, autoconf):
16963 - Rename the configure option --enable-expensive-hardening to
16964 --enable-fragile-hardening. Expensive hardening makes the tor
16965 daemon abort when some kinds of issues are detected. Thus, it
16966 makes tor more at risk of remote crashes but safer against RCE or
16967 heartbleed bug category. We now try to explain this issue in a
16968 message from the configure script. Fixes bug 21290; bugfix
16971 o Minor bugfixes (controller):
16972 - Restore the (deprecated) DROPGUARDS controller command. Fixes bug
16973 20824; bugfix on 0.3.0.1-alpha.
16975 o Minor bugfixes (hidden service):
16976 - Clean up the code for expiring intro points with no associated
16977 circuits. It was causing, rarely, a service with some expiring
16978 introduction points to not open enough additional introduction
16979 points. Fixes part of bug 21302; bugfix on 0.2.7.2-alpha.
16980 - Stop setting the torrc option HiddenServiceStatistics to "0" just
16981 because we're not a bridge or relay. Instead, we preserve whatever
16982 value the user set (or didn't set). Fixes bug 21150; bugfix
16984 - Resolve two possible underflows which could lead to creating and
16985 closing a lot of introduction point circuits in a non-stop loop.
16986 Fixes bug 21302; bugfix on 0.2.7.2-alpha.
16988 o Minor bugfixes (portability):
16989 - Use "OpenBSD" compiler macro instead of "OPENBSD" or "__OpenBSD__".
16990 It is supported by OpenBSD itself, and also by most OpenBSD
16991 variants (such as Bitrig). Fixes bug 20980; bugfix
16993 - When mapping a file of length greater than SIZE_MAX, do not
16994 silently truncate its contents. This issue could occur on 32 bit
16995 systems with large file support and files which are larger than 4
16996 GB. Fixes bug 21134; bugfix on 0.3.0.1-alpha.
16998 o Minor bugfixes (tor-resolve):
16999 - The tor-resolve command line tool now rejects hostnames over 255
17000 characters in length. Previously, it would silently truncate them,
17001 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
17002 Patch by "junglefowl".
17004 o Minor bugfixes (Windows services):
17005 - Be sure to initialize the monotonic time subsystem before using
17006 it, even when running as an NT service. Fixes bug 21356; bugfix
17010 Changes in version 0.3.0.2-alpha - 2017-01-23
17011 Tor 0.3.0.2-alpha fixes a denial-of-service bug where an attacker could
17012 cause relays and clients to crash, even if they were not built with
17013 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
17014 versions, and also affects 0.3.0.1-alpha: all relays running an affected
17015 version should upgrade.
17017 Tor 0.3.0.2-alpha also improves how exit relays and clients handle DNS
17018 time-to-live values, makes directory authorities enforce the 1-to-1
17019 mapping of relay RSA identity keys to ED25519 identity keys, fixes a
17020 client-side onion service reachability bug, does better at selecting
17021 the set of fallback directories, and more.
17023 o Major bugfixes (security, also in 0.2.9.9):
17024 - Downgrade the "-ftrapv" option from "always on" to "only on when
17025 --enable-expensive-hardening is provided." This hardening option, like
17026 others, can turn survivable bugs into crashes--and having it on by
17027 default made a (relatively harmless) integer overflow bug into a
17028 denial-of-service bug. Fixes bug 21278 (TROVE-2017-001); bugfix on
17031 o Major features (security):
17032 - Change the algorithm used to decide DNS TTLs on client and server
17033 side, to better resist DNS-based correlation attacks like the
17034 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
17035 Feamster. Now relays only return one of two possible DNS TTL
17036 values, and clients are willing to believe DNS TTL values up to 3
17037 hours long. Closes ticket 19769.
17039 o Major features (directory authority, security):
17040 - The default for AuthDirPinKeys is now 1: directory authorities
17041 will reject relays where the RSA identity key matches a previously
17042 seen value, but the Ed25519 key has changed. Closes ticket 18319.
17044 o Major bugfixes (client, guard, crash):
17045 - In circuit_get_global_origin_list(), return the actual list of
17046 origin circuits. The previous version of this code returned the
17047 list of all the circuits, and could have caused strange bugs,
17048 including possible crashes. Fixes bug 21118; bugfix
17051 o Major bugfixes (client, onion service, also in 0.2.9.9):
17052 - Fix a client-side onion service reachability bug, where multiple
17053 socks requests to an onion service (or a single slow request)
17054 could cause us to mistakenly mark some of the service's
17055 introduction points as failed, and we cache that failure so
17056 eventually we run out and can't reach the service. Also resolves a
17057 mysterious "Remote server sent bogus reason code 65021" log
17058 warning. The bug was introduced in ticket 17218, where we tried to
17059 remember the circuit end reason as a uint16_t, which mangled
17060 negative values. Partially fixes bug 21056 and fixes bug 20307;
17061 bugfix on 0.2.8.1-alpha.
17063 o Major bugfixes (DNS):
17064 - Fix a bug that prevented exit nodes from caching DNS records for
17065 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
17067 o Minor features (controller):
17068 - Add "GETINFO sr/current" and "GETINFO sr/previous" keys, to expose
17069 shared-random values to the controller. Closes ticket 19925.
17071 o Minor features (entry guards):
17072 - Add UseEntryGuards to TEST_OPTIONS_DEFAULT_VALUES in order to not
17073 break regression tests.
17074 - Require UseEntryGuards when UseBridges is set, in order to make
17075 sure bridges aren't bypassed. Resolves ticket 20502.
17077 o Minor features (fallback directories):
17078 - Select 200 fallback directories for each release. Closes
17080 - Allow 3 fallback relays per operator, which is safe now that we
17081 are choosing 200 fallback relays. Closes ticket 20912.
17082 - Exclude relays affected by bug 20499 from the fallback list.
17083 Exclude relays from the fallback list if they are running versions
17084 known to be affected by bug 20499, or if in our tests they deliver
17085 a stale consensus (i.e. one that expired more than 24 hours ago).
17086 Closes ticket 20539.
17087 - Reduce the minimum fallback bandwidth to 1 MByte/s. Part of
17089 - Require fallback directories to have the same address and port for
17090 7 days (now that we have enough relays with this stability).
17091 Relays whose OnionOO stability timer is reset on restart by bug
17092 18050 should upgrade to Tor 0.2.8.7 or later, which has a fix for
17093 this issue. Closes ticket 20880; maintains short-term fix
17095 - Require fallbacks to have flags for 90% of the time (weighted
17096 decaying average), rather than 95%. This allows at least 73% of
17097 clients to bootstrap in the first 5 seconds without contacting an
17098 authority. Part of ticket 18828.
17099 - Annotate updateFallbackDirs.py with the bandwidth and consensus
17100 weight for each candidate fallback. Closes ticket 20878.
17101 - Make it easier to change the output sort order of fallbacks.
17102 Closes ticket 20822.
17103 - Display the relay fingerprint when downloading consensuses from
17104 fallbacks. Closes ticket 20908.
17106 o Minor features (geoip, also in 0.2.9.9):
17107 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
17110 o Minor features (next-gen onion service directories):
17111 - Remove the "EnableOnionServicesV3" consensus parameter that we
17112 introduced in 0.3.0.1-alpha: relays are now always willing to act
17113 as v3 onion service directories. Resolves ticket 19899.
17115 o Minor features (linting):
17116 - Enhance the changes file linter to warn on Tor versions that are
17117 prefixed with "tor-". Closes ticket 21096.
17119 o Minor features (logging):
17120 - In several places, describe unset ed25519 keys as "<unset>",
17121 rather than the scary "AAAAAAAA...AAA". Closes ticket 21037.
17123 o Minor bugfix (control protocol):
17124 - The reply to a "GETINFO config/names" request via the control
17125 protocol now spells the type "Dependent" correctly. This is a
17126 breaking change in the control protocol. (The field seems to be
17127 ignored by the most common known controllers.) Fixes bug 18146;
17128 bugfix on 0.1.1.4-alpha.
17130 o Minor bugfixes (bug resilience):
17131 - Fix an unreachable size_t overflow in base64_decode(). Fixes bug
17132 19222; bugfix on 0.2.0.9-alpha. Found by Guido Vranken; fixed by
17133 Hans Jerry Illikainen.
17135 o Minor bugfixes (build):
17136 - Replace obsolete Autoconf macros with their modern equivalent and
17137 prevent similar issues in the future. Fixes bug 20990; bugfix
17140 o Minor bugfixes (client, guards):
17141 - Fix bug where Tor would think that there are circuits waiting for
17142 better guards even though those circuits have been freed. Fixes
17143 bug 21142; bugfix on 0.3.0.1-alpha.
17145 o Minor bugfixes (config):
17146 - Don't assert on startup when trying to get the options list and
17147 LearnCircuitBuildTimeout is set to 0: we are currently parsing the
17148 options so of course they aren't ready yet. Fixes bug 21062;
17149 bugfix on 0.2.9.3-alpha.
17151 o Minor bugfixes (controller):
17152 - Make the GETINFO interface for inquiring about entry guards
17153 support the new guards backend. Fixes bug 20823; bugfix
17156 o Minor bugfixes (dead code):
17157 - Remove a redundant check for PidFile changes at runtime in
17158 options_transition_allowed(): this check is already performed
17159 regardless of whether the sandbox is active. Fixes bug 21123;
17160 bugfix on 0.2.5.4-alpha.
17162 o Minor bugfixes (documentation):
17163 - Update the tor manual page to document every option that can not
17164 be changed while tor is running. Fixes bug 21122.
17166 o Minor bugfixes (fallback directories):
17167 - Stop failing when a relay has no uptime data in
17168 updateFallbackDirs.py. Fixes bug 20945; bugfix on 0.2.8.1-alpha.
17169 - Avoid checking fallback candidates' DirPorts if they are down in
17170 OnionOO. When a relay operator has multiple relays, this
17171 prioritizes relays that are up over relays that are down. Fixes
17172 bug 20926; bugfix on 0.2.8.3-alpha.
17173 - Stop failing when OUTPUT_COMMENTS is True in updateFallbackDirs.py.
17174 Fixes bug 20877; bugfix on 0.2.8.3-alpha.
17176 o Minor bugfixes (guards, bootstrapping):
17177 - When connecting to a directory guard during bootstrap, do not mark
17178 the guard as successful until we receive a good-looking directory
17179 response from it. Fixes bug 20974; bugfix on 0.3.0.1-alpha.
17181 o Minor bugfixes (onion services):
17182 - Fix the config reload pruning of old vs new services so it
17183 actually works when both ephemeral and non-ephemeral services are
17184 configured. Fixes bug 21054; bugfix on 0.3.0.1-alpha.
17185 - Allow the number of introduction points to be as low as 0, rather
17186 than as low as 3. Fixes bug 21033; bugfix on 0.2.7.2-alpha.
17188 o Minor bugfixes (IPv6):
17189 - Make IPv6-using clients try harder to find an IPv6 directory
17190 server. Fixes bug 20999; bugfix on 0.2.8.2-alpha.
17191 - When IPv6 addresses have not been downloaded yet (microdesc
17192 consensus documents don't list relay IPv6 addresses), use hard-
17193 coded addresses for authorities, fallbacks, and configured
17194 bridges. Now IPv6-only clients can use microdescriptors. Fixes bug
17195 20996; bugfix on b167e82 from 19608 in 0.2.8.5-alpha.
17197 o Minor bugfixes (memory leaks):
17198 - Fix a memory leak when configuring hidden services. Fixes bug
17199 20987; bugfix on 0.3.0.1-alpha.
17201 o Minor bugfixes (portability, also in 0.2.9.9):
17202 - Avoid crashing when Tor is built using headers that contain
17203 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
17204 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
17206 - Fix Libevent detection on platforms without Libevent 1 headers
17207 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
17209 o Minor bugfixes (relay):
17210 - Honor DataDirectoryGroupReadable when tor is a relay. Previously,
17211 initializing the keys would reset the DataDirectory to 0700
17212 instead of 0750 even if DataDirectoryGroupReadable was set to 1.
17213 Fixes bug 19953; bugfix on 0.0.2pre16. Patch by "redfish".
17215 o Minor bugfixes (testing):
17216 - Remove undefined behavior from the backtrace generator by removing
17217 its signal handler. Fixes bug 21026; bugfix on 0.2.5.2-alpha.
17219 o Minor bugfixes (unit tests):
17220 - Allow the unit tests to pass even when DNS lookups of bogus
17221 addresses do not fail as expected. Fixes bug 20862 and 20863;
17222 bugfix on unit tests introduced in 0.2.8.1-alpha
17223 through 0.2.9.4-alpha.
17225 o Code simplification and refactoring:
17226 - Refactor code to manipulate global_origin_circuit_list into
17227 separate functions. Closes ticket 20921.
17229 o Documentation (formatting):
17230 - Clean up formatting of tor.1 man page and HTML doc, where <pre>
17231 blocks were incorrectly appearing. Closes ticket 20885.
17233 o Documentation (man page):
17234 - Clarify many options in tor.1 and add some min/max values for
17235 HiddenService options. Closes ticket 21058.
17238 Changes in version 0.2.9.9 - 2017-01-23
17239 Tor 0.2.9.9 fixes a denial-of-service bug where an attacker could
17240 cause relays and clients to crash, even if they were not built with
17241 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
17242 versions, and also affects 0.3.0.1-alpha: all relays running an affected
17243 version should upgrade.
17245 This release also resolves a client-side onion service reachability
17246 bug, and resolves a pair of small portability issues.
17248 o Major bugfixes (security):
17249 - Downgrade the "-ftrapv" option from "always on" to "only on when
17250 --enable-expensive-hardening is provided." This hardening option,
17251 like others, can turn survivable bugs into crashes -- and having
17252 it on by default made a (relatively harmless) integer overflow bug
17253 into a denial-of-service bug. Fixes bug 21278 (TROVE-2017-001);
17254 bugfix on 0.2.9.1-alpha.
17256 o Major bugfixes (client, onion service):
17257 - Fix a client-side onion service reachability bug, where multiple
17258 socks requests to an onion service (or a single slow request)
17259 could cause us to mistakenly mark some of the service's
17260 introduction points as failed, and we cache that failure so
17261 eventually we run out and can't reach the service. Also resolves a
17262 mysterious "Remote server sent bogus reason code 65021" log
17263 warning. The bug was introduced in ticket 17218, where we tried to
17264 remember the circuit end reason as a uint16_t, which mangled
17265 negative values. Partially fixes bug 21056 and fixes bug 20307;
17266 bugfix on 0.2.8.1-alpha.
17268 o Minor features (geoip):
17269 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
17272 o Minor bugfixes (portability):
17273 - Avoid crashing when Tor is built using headers that contain
17274 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
17275 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
17277 - Fix Libevent detection on platforms without Libevent 1 headers
17278 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
17281 Changes in version 0.3.0.1-alpha - 2016-12-19
17282 Tor 0.3.0.1-alpha is the first alpha release in the 0.3.0 development
17283 series. It strengthens Tor's link and circuit handshakes by
17284 identifying relays by their Ed25519 keys, improves the algorithm that
17285 clients use to choose and maintain their list of guards, and includes
17286 additional backend support for the next-generation hidden service
17287 design. It also contains numerous other small features and
17288 improvements to security, correctness, and performance.
17290 Below are the changes since 0.2.9.8.
17292 o Major features (guard selection algorithm):
17293 - Tor's guard selection algorithm has been redesigned from the
17294 ground up, to better support unreliable networks and restrictive
17295 sets of entry nodes, and to better resist guard-capture attacks by
17296 hostile local networks. Implements proposal 271; closes
17299 o Major features (next-generation hidden services):
17300 - Relays can now handle v3 ESTABLISH_INTRO cells as specified by
17301 prop224 aka "Next Generation Hidden Services". Service and clients
17302 don't use this functionality yet. Closes ticket 19043. Based on
17303 initial code by Alec Heifetz.
17304 - Relays now support the HSDir version 3 protocol, so that they can
17305 can store and serve v3 descriptors. This is part of the next-
17306 generation onion service work detailed in proposal 224. Closes
17309 o Major features (protocol, ed25519 identity keys):
17310 - Relays now use Ed25519 to prove their Ed25519 identities and to
17311 one another, and to clients. This algorithm is faster and more
17312 secure than the RSA-based handshake we've been doing until now.
17313 Implements the second big part of proposal 220; Closes
17315 - Clients now support including Ed25519 identity keys in the EXTEND2
17316 cells they generate. By default, this is controlled by a consensus
17317 parameter, currently disabled. You can turn this feature on for
17318 testing by setting ExtendByEd25519ID in your configuration. This
17319 might make your traffic appear different than the traffic
17320 generated by other users, however. Implements part of ticket
17321 15056; part of proposal 220.
17322 - Relays now understand requests to extend to other relays by their
17323 Ed25519 identity keys. When an Ed25519 identity key is included in
17324 an EXTEND2 cell, the relay will only extend the circuit if the
17325 other relay can prove ownership of that identity. Implements part
17326 of ticket 15056; part of proposal 220.
17328 o Major bugfixes (scheduler):
17329 - Actually compare circuit policies in ewma_cmp_cmux(). This bug
17330 caused the channel scheduler to behave more or less randomly,
17331 rather than preferring channels with higher-priority circuits.
17332 Fixes bug 20459; bugfix on 0.2.6.2-alpha.
17334 o Minor features (controller):
17335 - When HSFETCH arguments cannot be parsed, say "Invalid argument"
17336 rather than "unrecognized." Closes ticket 20389; patch from
17339 o Minor features (diagnostic, directory client):
17340 - Warn when we find an unexpected inconsistency in directory
17341 download status objects. Prevents some negative consequences of
17344 o Minor features (directory authority):
17345 - Add a new authority-only AuthDirTestEd25519LinkKeys option (on by
17346 default) to control whether authorities should try to probe relays
17347 by their Ed25519 link keys. This option will go away in a few
17348 releases--unless we encounter major trouble in our ed25519 link
17349 protocol rollout, in which case it will serve as a safety option.
17351 o Minor features (directory cache):
17352 - Relays and bridges will now refuse to serve the consensus they
17353 have if they know it is too old for a client to use. Closes
17356 o Minor features (ed25519 link handshake):
17357 - Advertise support for the ed25519 link handshake using the
17358 subprotocol-versions mechanism, so that clients can tell which
17359 relays can identity themselves by Ed25519 ID. Closes ticket 20552.
17361 o Minor features (fingerprinting resistance, authentication):
17362 - Extend the length of RSA keys used for TLS link authentication to
17363 2048 bits. (These weren't used for forward secrecy; for forward
17364 secrecy, we used P256.) Closes ticket 13752.
17366 o Minor features (infrastructure):
17367 - Implement smartlist_add_strdup() function. Replaces the use of
17368 smartlist_add(sl, tor_strdup(str)). Closes ticket 20048.
17370 o Minor bugfixes (client):
17371 - When clients that use bridges start up with a cached consensus on
17372 disk, they were ignoring it and downloading a new one. Now they
17373 use the cached one. Fixes bug 20269; bugfix on 0.2.3.12-alpha.
17375 o Minor bugfixes (configuration):
17376 - Accept non-space whitespace characters after the severity level in
17377 the `Log` option. Fixes bug 19965; bugfix on 0.2.1.1-alpha.
17378 - Support "TByte" and "TBytes" units in options given in bytes.
17379 "TB", "terabyte(s)", "TBit(s)" and "terabit(s)" were already
17380 supported. Fixes bug 20622; bugfix on 0.2.0.14-alpha.
17382 o Minor bugfixes (consensus weight):
17383 - Add new consensus method that initializes bw weights to 1 instead
17384 of 0. This prevents a zero weight from making it all the way to
17385 the end (happens in small testing networks) and causing an error.
17386 Fixes bug 14881; bugfix on 0.2.2.17-alpha.
17388 o Minor bugfixes (descriptors):
17389 - Correctly recognise downloaded full descriptors as valid, even
17390 when using microdescriptors as circuits. This affects clients with
17391 FetchUselessDescriptors set, and may affect directory authorities.
17392 Fixes bug 20839; bugfix on 0.2.3.2-alpha.
17394 o Minor bugfixes (directory system):
17395 - Download all consensus flavors, descriptors, and authority
17396 certificates when FetchUselessDescriptors is set, regardless of
17397 whether tor is a directory cache or not. Fixes bug 20667; bugfix
17398 on all recent tor versions.
17399 - Bridges and relays now use microdescriptors (like clients do)
17400 rather than old-style router descriptors. Now bridges will blend
17401 in with clients in terms of the circuits they build. Fixes bug
17402 6769; bugfix on 0.2.3.2-alpha.
17404 o Minor bugfixes (ed25519 certificates):
17405 - Correctly interpret ed25519 certificates that would expire some
17406 time after 19 Jan 2038. Fixes bug 20027; bugfix on 0.2.7.2-alpha.
17408 o Minor bugfixes (hidden services):
17409 - Stop ignoring misconfigured hidden services. Instead, refuse to
17410 start tor until the misconfigurations have been corrected. Fixes
17411 bug 20559; bugfix on multiple commits in 0.2.7.1-alpha
17414 o Minor bugfixes (memory leak at exit):
17415 - Fix a small harmless memory leak at exit of the previously unused
17416 RSA->Ed identity cross-certificate. Fixes bug 17779; bugfix
17419 o Minor bugfixes (util):
17420 - When finishing writing a file to disk, if we were about to replace
17421 the file with the temporary file created before and we fail to
17422 replace it, remove the temporary file so it doesn't stay on disk.
17423 Fixes bug 20646; bugfix on 0.2.0.7-alpha. Patch by fk.
17425 o Minor bugfixes (Windows):
17426 - Check for getpagesize before using it to mmap files. This fixes
17427 compilation in some MinGW environments. Fixes bug 20530; bugfix on
17428 0.1.2.1-alpha. Reported by "ice".
17430 o Code simplification and refactoring:
17431 - Abolish all global guard context in entrynodes.c; replace with new
17432 guard_selection_t structure as preparation for proposal 271.
17433 Closes ticket 19858.
17434 - Introduce rend_service_is_ephemeral() that tells if given onion
17435 service is ephemeral. Replace unclear NULL-checkings for service
17436 directory with this function. Closes ticket 20526.
17437 - Extract magic numbers in circuituse.c into defined variables.
17438 - Refactor circuit_is_available_for_use to remove unnecessary check.
17439 - Refactor circuit_predict_and_launch_new for readability and
17440 testability. Closes ticket 18873.
17441 - Refactor large if statement in purpose_needs_anonymity to use
17442 switch statement instead. Closes part of ticket 20077.
17443 - Refactor the hashing API to return negative values for errors, as
17444 is done as throughout the codebase. Closes ticket 20717.
17445 - Remove data structures that were used to index or_connection
17446 objects by their RSA identity digests. These structures are fully
17447 redundant with the similar structures used in the
17448 channel abstraction.
17449 - Remove duplicate code in the channel_write_*cell() functions.
17450 Closes ticket 13827; patch from Pingl.
17451 - Remove redundant behavior of is_sensitive_dir_purpose, refactor to
17452 use only purpose_needs_anonymity. Closes part of ticket 20077.
17453 - The code to generate and parse EXTEND and EXTEND2 cells has been
17454 replaced with code automatically generated by the
17458 - Include the "TBits" unit in Tor's man page. Fixes part of bug
17459 20622; bugfix on 0.2.5.1-alpha.
17460 - Change '1' to 'weight_scale' in consensus bw weights calculation
17461 comments, as that is reality. Closes ticket 20273. Patch
17463 - Correct the value for AuthDirGuardBWGuarantee in the manpage, from
17464 250 KBytes to 2 MBytes. Fixes bug 20435; bugfix
17466 - Stop the man page from incorrectly stating that HiddenServiceDir
17467 must already exist. Fixes 20486.
17468 - Clarify that when ClientRejectInternalAddresses is enabled (which
17469 is the default), multicast DNS hostnames for machines on the local
17470 network (of the form *.local) are also rejected. Closes
17473 o Removed features:
17474 - The AuthDirMaxServersPerAuthAddr option no longer exists: The same
17475 limit for relays running on a single IP applies to authority IP
17476 addresses as well as to non-authority IP addresses. Closes
17478 - The UseDirectoryGuards torrc option no longer exists: all users
17479 that use entry guards will also use directory guards. Related to
17480 proposal 271; implements part of ticket 20831.
17483 - New unit tests for tor_htonll(). Closes ticket 19563. Patch
17484 from "overcaffeinated".
17485 - Perform the coding style checks when running the tests and fail
17486 when coding style violations are found. Closes ticket 5500.
17487 - Add tests for networkstatus_compute_bw_weights_v10.
17488 - Add unit tests circuit_predict_and_launch_new.
17489 - Extract dummy_origin_circuit_new so it can be used by other
17493 Changes in version 0.2.8.12 - 2016-12-19
17494 Tor 0.2.8.12 backports a fix for a medium-severity issue (bug 21018
17495 below) where Tor clients could crash when attempting to visit a
17496 hostile hidden service. Clients are recommended to upgrade as packages
17497 become available for their systems.
17499 It also includes an updated list of fallback directories, backported
17502 Now that the Tor 0.2.9 series is stable, only major bugfixes will be
17503 backported to 0.2.8 in the future.
17505 o Major bugfixes (parsing, security, backported from 0.2.9.8):
17506 - Fix a bug in parsing that could cause clients to read a single
17507 byte past the end of an allocated region. This bug could be used
17508 to cause hardened clients (built with --enable-expensive-hardening)
17509 to crash if they tried to visit a hostile hidden service. Non-
17510 hardened clients are only affected depending on the details of
17511 their platform's memory allocator. Fixes bug 21018; bugfix on
17512 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
17513 2016-12-002 and as CVE-2016-1254.
17515 o Minor features (fallback directory list, backported from 0.2.9.8):
17516 - Replace the 81 remaining fallbacks of the 100 originally
17517 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
17518 fallbacks (123 new, 54 existing, 27 removed) generated in December
17519 2016. Resolves ticket 20170.
17521 o Minor features (geoip, backported from 0.2.9.7-rc):
17522 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
17526 Changes in version 0.2.9.8 - 2016-12-19
17527 Tor 0.2.9.8 is the first stable release of the Tor 0.2.9 series.
17529 The Tor 0.2.9 series makes mandatory a number of security features
17530 that were formerly optional. It includes support for a new shared-
17531 randomness protocol that will form the basis for next generation
17532 hidden services, includes a single-hop hidden service mode for
17533 optimizing .onion services that don't actually want to be hidden,
17534 tries harder not to overload the directory authorities with excessive
17535 downloads, and supports a better protocol versioning scheme for
17536 improved compatibility with other implementations of the Tor protocol.
17538 And of course, there are numerous other bugfixes and improvements.
17540 This release also includes a fix for a medium-severity issue (bug
17541 21018 below) where Tor clients could crash when attempting to visit a
17542 hostile hidden service. Clients are recommended to upgrade as packages
17543 become available for their systems.
17545 Below are the changes since 0.2.9.7-rc. For a list of all changes
17546 since 0.2.8, see the ReleaseNotes file.
17548 o Major bugfixes (parsing, security):
17549 - Fix a bug in parsing that could cause clients to read a single
17550 byte past the end of an allocated region. This bug could be used
17551 to cause hardened clients (built with --enable-expensive-hardening)
17552 to crash if they tried to visit a hostile hidden service. Non-
17553 hardened clients are only affected depending on the details of
17554 their platform's memory allocator. Fixes bug 21018; bugfix on
17555 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
17556 2016-12-002 and as CVE-2016-1254.
17558 o Minor features (fallback directory list):
17559 - Replace the 81 remaining fallbacks of the 100 originally
17560 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
17561 fallbacks (123 new, 54 existing, 27 removed) generated in December
17562 2016. Resolves ticket 20170.
17565 Changes in version 0.2.9.7-rc - 2016-12-12
17566 Tor 0.2.9.7-rc fixes a few small bugs remaining in Tor 0.2.9.6-rc,
17567 including a few that had prevented tests from passing on
17570 o Minor features (geoip):
17571 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
17574 o Minor bugfix (build):
17575 - The current Git revision when building from a local repository is
17576 now detected correctly when using git worktrees. Fixes bug 20492;
17577 bugfix on 0.2.3.9-alpha.
17579 o Minor bugfixes (directory authority):
17580 - When computing old Tor protocol line version in protover, we were
17581 looking at 0.2.7.5 twice instead of a specific case for
17582 0.2.9.1-alpha. Fixes bug 20810; bugfix on 0.2.9.4-alpha.
17584 o Minor bugfixes (download scheduling):
17585 - Resolve a "bug" warning when considering a download schedule whose
17586 delay had approached INT_MAX. Fixes 20875; bugfix on 0.2.9.5-alpha.
17588 o Minor bugfixes (logging):
17589 - Downgrade a harmless log message about the
17590 pending_entry_connections list from "warn" to "info". Mitigates
17593 o Minor bugfixes (memory leak):
17594 - Fix a small memory leak when receiving AF_UNIX connections on a
17595 SocksPort. Fixes bug 20716; bugfix on 0.2.6.3-alpha.
17596 - When moving a signed descriptor object from a source to an
17597 existing destination, free the allocated memory inside that
17598 destination object. Fixes bug 20715; bugfix on 0.2.8.3-alpha.
17600 o Minor bugfixes (memory leak, use-after-free, linux seccomp2 sandbox):
17601 - Fix a memory leak and use-after-free error when removing entries
17602 from the sandbox's getaddrinfo() cache. Fixes bug 20710; bugfix on
17603 0.2.5.5-alpha. Patch from "cypherpunks".
17605 o Minor bugfixes (portability):
17606 - Use the correct spelling of MAC_OS_X_VERSION_10_12 on configure.ac
17607 Fixes bug 20935; bugfix on 0.2.9.6-rc.
17609 o Minor bugfixes (unit tests):
17610 - Stop expecting NetBSD unit tests to report success for ipfw. Part
17611 of a fix for bug 19960; bugfix on 0.2.9.5-alpha.
17612 - Fix tolerances in unit tests for monotonic time comparisons
17613 between nanoseconds and microseconds. Previously, we accepted a 10
17614 us difference only, which is not realistic on every platform's
17615 clock_gettime(). Fixes bug 19974; bugfix on 0.2.9.1-alpha.
17616 - Remove a double-free in the single onion service unit test. Stop
17617 ignoring a return value. Make future changes less error-prone.
17618 Fixes bug 20864; bugfix on 0.2.9.6-rc.
17621 Changes in version 0.2.8.11 - 2016-12-08
17622 Tor 0.2.8.11 backports fixes for additional portability issues that
17623 could prevent Tor from building correctly on OSX Sierra, or with
17624 OpenSSL 1.1. Affected users should upgrade; others can safely stay
17627 o Minor bugfixes (portability):
17628 - Avoid compilation errors when building on OSX Sierra. Sierra began
17629 to support the getentropy() and clock_gettime() APIs, but created
17630 a few problems in doing so. Tor 0.2.9 has a more thorough set of
17631 workarounds; in 0.2.8, we are just using the /dev/urandom and mach
17632 monotonic time interfaces. Fixes bug 20865. Bugfix
17635 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
17636 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
17637 architectures. Closes ticket 20588.
17640 Changes in version 0.2.8.10 - 2016-12-02
17641 Tor 0.2.8.10 backports a fix for a bug that would sometimes make clients
17642 unusable after they left standby mode. It also backports fixes for
17643 a few portability issues and a small but problematic memory leak.
17645 o Major bugfixes (client reliability, backport from 0.2.9.5-alpha):
17646 - When Tor leaves standby because of a new application request, open
17647 circuits as needed to serve that request. Previously, we would
17648 potentially wait a very long time. Fixes part of bug 19969; bugfix
17651 o Major bugfixes (client performance, backport from 0.2.9.5-alpha):
17652 - Clients now respond to new application stream requests immediately
17653 when they arrive, rather than waiting up to one second before
17654 starting to handle them. Fixes part of bug 19969; bugfix
17657 o Minor bugfixes (portability, backport from 0.2.9.6-rc):
17658 - Work around a bug in the OSX 10.12 SDK that would prevent us from
17659 successfully targeting earlier versions of OSX. Resolves
17662 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
17663 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
17664 20551; bugfix on 0.2.1.1-alpha.
17666 o Minor bugfixes (relay, backport from 0.2.9.5-alpha):
17667 - Work around a memory leak in OpenSSL 1.1 when encoding public
17668 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
17670 o Minor features (geoip):
17671 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
17674 Changes in version 0.2.9.6-rc - 2016-12-02
17675 Tor 0.2.9.6-rc fixes a few remaining bugs found in the previous alpha
17676 version. We hope that it will be ready to become stable soon, and we
17677 encourage everyone to test this release. If no showstopper bugs are
17678 found here, the next 0.2.9 release will be stable.
17680 o Major bugfixes (relay, resolver, logging):
17681 - For relays that don't know their own address, avoid attempting a
17682 local hostname resolve for each descriptor we download. This
17683 will cut down on the number of "Success: chose address 'x.x.x.x'"
17684 log lines, and also avoid confusing clock jumps if the resolver
17685 is slow. Fixes bugs 20423 and 20610; bugfix on 0.2.8.1-alpha.
17687 o Minor bugfixes (client, fascistfirewall):
17688 - Avoid spurious warnings when ReachableAddresses or FascistFirewall
17689 is set. Fixes bug 20306; bugfix on 0.2.8.2-alpha.
17691 o Minor bugfixes (hidden services):
17692 - Stop ignoring the anonymity status of saved keys for hidden
17693 services and single onion services when first starting tor.
17694 Instead, refuse to start tor if any hidden service key has been
17695 used in a different hidden service anonymity mode. Fixes bug
17696 20638; bugfix on 17178 in 0.2.9.3-alpha; reported by ahf.
17698 o Minor bugfixes (portability):
17699 - Work around a bug in the OSX 10.12 SDK that would prevent us from
17700 successfully targeting earlier versions of OSX. Resolves
17702 - Run correctly when built on Windows build environments that
17703 require _vcsprintf(). Fixes bug 20560; bugfix on 0.2.2.11-alpha.
17705 o Minor bugfixes (single onion services, Tor2web):
17706 - Stop complaining about long-term one-hop circuits deliberately
17707 created by single onion services and Tor2web. These log messages
17708 are intended to diagnose issue 8387, which relates to circuits
17709 hanging around forever for no reason. Fixes bug 20613; bugfix on
17710 0.2.9.1-alpha. Reported by "pastly".
17712 o Minor bugfixes (unit tests):
17713 - Stop spurious failures in the local interface address discovery
17714 unit tests. Fixes bug 20634; bugfix on 0.2.8.1-alpha; patch by
17718 - Correct the minimum bandwidth value in torrc.sample, and queue a
17719 corresponding change for torrc.minimal. Closes ticket 20085.
17722 Changes in version 0.2.9.5-alpha - 2016-11-08
17723 Tor 0.2.9.5-alpha fixes numerous bugs discovered in the previous alpha
17724 version. We believe one or two probably remain, and we encourage
17725 everyone to test this release.
17727 o Major bugfixes (client performance):
17728 - Clients now respond to new application stream requests immediately
17729 when they arrive, rather than waiting up to one second before
17730 starting to handle them. Fixes part of bug 19969; bugfix
17733 o Major bugfixes (client reliability):
17734 - When Tor leaves standby because of a new application request, open
17735 circuits as needed to serve that request. Previously, we would
17736 potentially wait a very long time. Fixes part of bug 19969; bugfix
17739 o Major bugfixes (download scheduling):
17740 - When using an exponential backoff schedule, do not give up on
17741 downloading just because we have failed a bunch of times. Since
17742 each delay is longer than the last, retrying indefinitely won't
17743 hurt. Fixes bug 20536; bugfix on 0.2.9.1-alpha.
17744 - If a consensus expires while we are waiting for certificates to
17745 download, stop waiting for certificates.
17746 - If we stop waiting for certificates less than a minute after we
17747 started downloading them, do not consider the certificate download
17748 failure a separate failure. Fixes bug 20533; bugfix
17750 - Remove the maximum delay on exponential-backoff scheduling. Since
17751 we now allow an infinite number of failures (see ticket 20536), we
17752 must now allow the time to grow longer on each failure. Fixes part
17753 of bug 20534; bugfix on 0.2.9.1-alpha.
17754 - Make our initial download delays closer to those from 0.2.8. Fixes
17755 another part of bug 20534; bugfix on 0.2.9.1-alpha.
17756 - When determining when to download a directory object, handle times
17757 after 2038 if the operating system supports them. (Someday this
17758 will be important!) Fixes bug 20587; bugfix on 0.2.8.1-alpha.
17759 - When using exponential backoff in test networks, use a lower
17760 exponent, so the delays do not vary as much. This helps test
17761 networks bootstrap consistently. Fixes bug 20597; bugfix on 20499.
17763 o Minor features (geoip):
17764 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
17767 o Minor bugfixes (client directory scheduling):
17768 - Treat "relay too busy to answer request" as a failed request and a
17769 reason to back off on our retry frequency. This is safe now that
17770 exponential backoffs retry indefinitely, and avoids a bug where we
17771 would reset our download schedule erroneously. Fixes bug 20593;
17772 bugfix on 0.2.9.1-alpha.
17774 o Minor bugfixes (client, logging):
17775 - Remove a BUG warning in circuit_pick_extend_handshake(). Instead,
17776 assume all nodes support EXTEND2. Use ntor whenever a key is
17777 available. Fixes bug 20472; bugfix on 0.2.9.3-alpha.
17778 - On DNSPort, stop logging a BUG warning on a failed hostname
17779 lookup. Fixes bug 19869; bugfix on 0.2.9.1-alpha.
17781 o Minor bugfixes (hidden services):
17782 - When configuring hidden services, check every hidden service
17783 directory's permissions. Previously, we only checked the last
17784 hidden service. Fixes bug 20529; bugfix the work to fix 13942
17787 o Minor bugfixes (portability):
17788 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
17789 architectures. Closes ticket 20588.
17790 - Use ECDHE ciphers instead of ECDH in tortls tests. LibreSSL has
17791 removed the ECDH ciphers which caused the tests to fail on
17792 platforms which use it. Fixes bug 20460; bugfix on 0.2.8.1-alpha.
17793 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
17794 20551; bugfix on 0.2.1.1-alpha.
17796 o Minor bugfixes (relay bootstrap):
17797 - Ensure relays don't make multiple connections during bootstrap.
17798 Fixes bug 20591; bugfix on 0.2.8.1-alpha.
17800 o Minor bugfixes (relay):
17801 - Work around a memory leak in OpenSSL 1.1 when encoding public
17802 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
17803 - Avoid a small memory leak when informing worker threads about
17804 rotated onion keys. Fixes bug 20401; bugfix on 0.2.6.3-alpha.
17805 - Do not try to parallelize workers more than 16x without the user
17806 explicitly configuring us to do so, even if we do detect more than
17807 16 CPU cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
17809 o Minor bugfixes (single onion services):
17810 - Start correctly when creating a single onion service in a
17811 directory that did not previously exist. Fixes bug 20484; bugfix
17814 o Minor bugfixes (testing):
17815 - Avoid a unit test failure on systems with over 16 detectable CPU
17816 cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
17819 - Clarify that setting HiddenServiceNonAnonymousMode requires you to
17820 also set "SOCKSPort 0". Fixes bug 20487; bugfix on 0.2.9.3-alpha.
17821 - Module-level documentation for several more modules. Closes
17822 tickets 19287 and 19290.
17825 Changes in version 0.2.8.9 - 2016-10-17
17826 Tor 0.2.8.9 backports a fix for a security hole in previous versions
17827 of Tor that would allow a remote attacker to crash a Tor client,
17828 hidden service, relay, or authority. All Tor users should upgrade to
17829 this version, or to 0.2.9.4-alpha. Patches will be released for older
17832 o Major features (security fixes, also in 0.2.9.4-alpha):
17833 - Prevent a class of security bugs caused by treating the contents
17834 of a buffer chunk as if they were a NUL-terminated string. At
17835 least one such bug seems to be present in all currently used
17836 versions of Tor, and would allow an attacker to remotely crash
17837 most Tor instances, especially those compiled with extra compiler
17838 hardening. With this defense in place, such bugs can't crash Tor,
17839 though we should still fix them as they occur. Closes ticket
17840 20384 (TROVE-2016-10-001).
17842 o Minor features (geoip):
17843 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
17847 Changes in version 0.2.9.4-alpha - 2016-10-17
17848 Tor 0.2.9.4-alpha fixes a security hole in previous versions of Tor
17849 that would allow a remote attacker to crash a Tor client, hidden
17850 service, relay, or authority. All Tor users should upgrade to this
17851 version, or to 0.2.8.9. Patches will be released for older versions
17854 Tor 0.2.9.4-alpha also adds numerous small features and fix-ups to
17855 previous versions of Tor, including the implementation of a feature to
17856 future- proof the Tor ecosystem against protocol changes, some bug
17857 fixes necessary for Tor Browser to use unix domain sockets correctly,
17858 and several portability improvements. We anticipate that this will be
17859 the last alpha in the Tor 0.2.9 series, and that the next release will
17860 be a release candidate.
17862 o Major features (security fixes):
17863 - Prevent a class of security bugs caused by treating the contents
17864 of a buffer chunk as if they were a NUL-terminated string. At
17865 least one such bug seems to be present in all currently used
17866 versions of Tor, and would allow an attacker to remotely crash
17867 most Tor instances, especially those compiled with extra compiler
17868 hardening. With this defense in place, such bugs can't crash Tor,
17869 though we should still fix them as they occur. Closes ticket
17870 20384 (TROVE-2016-10-001).
17872 o Major features (subprotocol versions):
17873 - Tor directory authorities now vote on a set of recommended
17874 subprotocol versions, and on a set of required subprotocol
17875 versions. Clients and relays that lack support for a _required_
17876 subprotocol version will not start; those that lack support for a
17877 _recommended_ subprotocol version will warn the user to upgrade.
17878 Closes ticket 19958; implements part of proposal 264.
17879 - Tor now uses "subprotocol versions" to indicate compatibility.
17880 Previously, versions of Tor looked at the declared Tor version of
17881 a relay to tell whether they could use a given feature. Now, they
17882 should be able to rely on its declared subprotocol versions. This
17883 change allows compatible implementations of the Tor protocol(s) to
17884 exist without pretending to be 100% bug-compatible with particular
17885 releases of Tor itself. Closes ticket 19958; implements part of
17888 o Minor feature (fallback directories):
17889 - Remove broken fallbacks from the hard-coded fallback directory
17890 list. Closes ticket 20190; patch by teor.
17892 o Minor features (client, directory):
17893 - Since authorities now omit all routers that lack the Running and
17894 Valid flags, we assume that any relay listed in the consensus must
17895 have those flags. Closes ticket 20001; implements part of
17898 o Minor features (compilation, portability):
17899 - Compile correctly on MacOS 10.12 (aka "Sierra"). Closes
17902 o Minor features (development tools, etags):
17903 - Teach the "make tags" Makefile target how to correctly find
17904 "MOCK_IMPL" function definitions. Patch from nherring; closes
17907 o Minor features (geoip):
17908 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
17911 o Minor features (unix domain sockets):
17912 - When configuring a unix domain socket for a SocksPort,
17913 ControlPort, or Hidden service, you can now wrap the address in
17914 quotes, using C-style escapes inside the quotes. This allows unix
17915 domain socket paths to contain spaces.
17917 o Minor features (virtual addresses):
17918 - Increase the maximum number of bits for the IPv6 virtual network
17919 prefix from 16 to 104. In this way, the condition for address
17920 allocation is less restrictive. Closes ticket 20151; feature
17923 o Minor bugfixes (address discovery):
17924 - Stop reordering IP addresses returned by the OS. This makes it
17925 more likely that Tor will guess the same relay IP address every
17926 time. Fixes issue 20163; bugfix on 0.2.7.1-alpha, ticket 17027.
17927 Reported by René Mayrhofer, patch by "cypherpunks".
17929 o Minor bugfixes (client, unix domain sockets):
17930 - Disable IsolateClientAddr when using AF_UNIX backed SocksPorts as
17931 the client address is meaningless. Fixes bug 20261; bugfix
17934 o Minor bugfixes (compilation, OpenBSD):
17935 - Detect Libevent2 functions correctly on systems that provide
17936 libevent2, but where libevent1 is linked with -levent. Fixes bug
17937 19904; bugfix on 0.2.2.24-alpha. Patch from Rubiate.
17939 o Minor bugfixes (configuration):
17940 - When parsing quoted configuration values from the torrc file,
17941 handle windows line endings correctly. Fixes bug 19167; bugfix on
17942 0.2.0.16-alpha. Patch from "Pingl".
17944 o Minor bugfixes (getpass):
17945 - Defensively fix a non-triggerable heap corruption at do_getpass()
17946 to protect ourselves from mistakes in the future. Fixes bug
17947 19223; bugfix on 0.2.7.3-rc. Bug found by Guido Vranken, patch
17950 o Minor bugfixes (hidden service):
17951 - Allow hidden services to run on IPv6 addresses even when the
17952 IPv6Exit option is not set. Fixes bug 18357; bugfix
17956 - Add module-level internal documentation for 36 C files that
17957 previously didn't have a high-level overview. Closes ticket #20385.
17959 o Required libraries:
17960 - When building with OpenSSL, Tor now requires version 1.0.1 or
17961 later. OpenSSL 1.0.0 and earlier are no longer supported by the
17962 OpenSSL team, and should not be used. Closes ticket 20303.
17965 Changes in version 0.2.9.3-alpha - 2016-09-23
17966 Tor 0.2.9.3-alpha adds improved support for entities that want to make
17967 high-performance services available through the Tor .onion mechanism
17968 without themselves receiving anonymity as they host those services. It
17969 also tries harder to ensure that all steps on a circuit are using the
17970 strongest crypto possible, strengthens some TLS properties, and
17971 resolves several bugs -- including a pair of crash bugs from the 0.2.8
17972 series. Anybody running an earlier version of 0.2.9.x should upgrade.
17974 o Major bugfixes (crash, also in 0.2.8.8):
17975 - Fix a complicated crash bug that could affect Tor clients
17976 configured to use bridges when replacing a networkstatus consensus
17977 in which one of their bridges was mentioned. OpenBSD users saw
17978 more crashes here, but all platforms were potentially affected.
17979 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
17981 o Major bugfixes (relay, OOM handler, also in 0.2.8.8):
17982 - Fix a timing-dependent assertion failure that could occur when we
17983 tried to flush from a circuit after having freed its cells because
17984 of an out-of-memory condition. Fixes bug 20203; bugfix on
17985 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
17988 o Major features (circuit building, security):
17989 - Authorities, relays and clients now require ntor keys in all
17990 descriptors, for all hops (except for rare hidden service protocol
17991 cases), for all circuits, and for all other roles. Part of
17993 - Tor authorities, relays, and clients only use ntor, except for
17994 rare cases in the hidden service protocol. Part of ticket 19163.
17996 o Major features (single-hop "hidden" services):
17997 - Add experimental HiddenServiceSingleHopMode and
17998 HiddenServiceNonAnonymousMode options. When both are set to 1,
17999 every hidden service on a Tor instance becomes a non-anonymous
18000 Single Onion Service. Single Onions make one-hop (direct)
18001 connections to their introduction and rendezvous points. One-hop
18002 circuits make Single Onion servers easily locatable, but clients
18003 remain location-anonymous. This is compatible with the existing
18004 hidden service implementation, and works on the current tor
18005 network without any changes to older relays or clients. Implements
18006 proposal 260, completes ticket 17178. Patch by teor and asn.
18008 o Major features (resource management):
18009 - Tor can now notice it is about to run out of sockets, and
18010 preemptively close connections of lower priority. (This feature is
18011 off by default for now, since the current prioritizing method is
18012 yet not mature enough. You can enable it by setting
18013 "DisableOOSCheck 0", but watch out: it might close some sockets
18014 you would rather have it keep.) Closes ticket 18640.
18016 o Major bugfixes (circuit building):
18017 - Hidden service client-to-intro-point and service-to-rendezvous-
18018 point circuits use the TAP key supplied by the protocol, to avoid
18019 epistemic attacks. Fixes bug 19163; bugfix on 0.2.4.18-rc.
18021 o Major bugfixes (compilation, OpenBSD):
18022 - Fix a Libevent-detection bug in our autoconf script that would
18023 prevent Tor from linking successfully on OpenBSD. Patch from
18024 rubiate. Fixes bug 19902; bugfix on 0.2.9.1-alpha.
18026 o Major bugfixes (hidden services):
18027 - Clients now require hidden services to include the TAP keys for
18028 their intro points in the hidden service descriptor. This prevents
18029 an inadvertent upgrade to ntor, which a malicious hidden service
18030 could use to distinguish clients by consensus version. Fixes bug
18031 20012; bugfix on 0.2.4.8-alpha. Patch by teor.
18033 o Minor features (security, TLS):
18034 - Servers no longer support clients that without AES ciphersuites.
18035 (3DES is no longer considered an acceptable cipher.) We believe
18036 that no such Tor clients currently exist, since Tor has required
18037 OpenSSL 0.9.7 or later since 2009. Closes ticket 19998.
18039 o Minor feature (fallback directories):
18040 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
18041 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
18042 2016. Closes ticket 20190; patch by teor.
18044 o Minor features (geoip, also in 0.2.8.8):
18045 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
18048 o Minor feature (port flags):
18049 - Add new flags to the *Port options to finer control over which
18050 requests are allowed. The flags are NoDNSRequest, NoOnionTraffic,
18051 and the synthetic flag OnionTrafficOnly, which is equivalent to
18052 NoDNSRequest, NoIPv4Traffic, and NoIPv6Traffic. Closes enhancement
18053 18693; patch by "teor".
18055 o Minor features (directory authority):
18056 - After voting, if the authorities decide that a relay is not
18057 "Valid", they no longer include it in the consensus at all. Closes
18058 ticket 20002; implements part of proposal 272.
18060 o Minor features (testing):
18061 - Disable memory protections on OpenBSD when performing our unit
18062 tests for memwipe(). The test deliberately invokes undefined
18063 behavior, and the OpenBSD protections interfere with this. Patch
18064 from "rubiate". Closes ticket 20066.
18066 o Minor features (testing, ipv6):
18067 - Add the single-onion and single-onion-ipv6 chutney targets to
18068 "make test-network-all". This requires a recent chutney version
18069 with the single onion network flavours (git c72a652 or later).
18070 Closes ticket 20072; patch by teor.
18071 - Add the hs-ipv6 chutney target to make test-network-all's IPv6
18072 tests. Remove bridges+hs, as it's somewhat redundant. This
18073 requires a recent chutney version that supports IPv6 clients,
18074 relays, and authorities. Closes ticket 20069; patch by teor.
18076 o Minor features (Tor2web):
18077 - Make Tor2web clients respect ReachableAddresses. This feature was
18078 inadvertently enabled in 0.2.8.6, then removed by bugfix 19973 on
18079 0.2.8.7. Implements feature 20034. Patch by teor.
18081 o Minor features (unit tests):
18082 - We've done significant work to make the unit tests run faster.
18083 - Our link-handshake unit tests now check that when invalid
18084 handshakes fail, they fail with the error messages we expected.
18085 - Our unit testing code that captures log messages no longer
18086 prevents them from being written out if the user asked for them
18087 (by passing --debug or --info or or --notice --warn to the "test"
18088 binary). This change prevents us from missing unexpected log
18089 messages simply because we were looking for others. Related to
18091 - The unit tests now log all warning messages with the "BUG" flag.
18092 Previously, they only logged errors by default. This change will
18093 help us make our testing code more correct, and make sure that we
18094 only hit this code when we mean to. In the meantime, however,
18095 there will be more warnings in the unit test logs than before.
18096 This is preparatory work for ticket 19999.
18097 - The unit tests now treat any failure of a "tor_assert_nonfatal()"
18098 assertion as a test failure.
18100 o Minor bug fixes (circuits):
18101 - Use the CircuitBuildTimeout option whenever
18102 LearnCircuitBuildTimeout is disabled. Previously, we would respect
18103 the option when a user disabled it, but not when it was disabled
18104 because some other option was set. Fixes bug 20073; bugfix on
18105 0.2.4.12-alpha. Patch by teor.
18107 o Minor bugfixes (allocation):
18108 - Change how we allocate memory for large chunks on buffers, to
18109 avoid a (currently impossible) integer overflow, and to waste less
18110 space when allocating unusually large chunks. Fixes bug 20081;
18111 bugfix on 0.2.0.16-alpha. Issue identified by Guido Vranken.
18112 - Always include orconfig.h before including any other C headers.
18113 Sometimes, it includes macros that affect the behavior of the
18114 standard headers. Fixes bug 19767; bugfix on 0.2.9.1-alpha (the
18115 first version to use AC_USE_SYSTEM_EXTENSIONS).
18116 - Fix a syntax error in the IF_BUG_ONCE__() macro in non-GCC-
18117 compatible compilers. Fixes bug 20141; bugfix on 0.2.9.1-alpha.
18118 Patch from Gisle Vanem.
18119 - Stop trying to build with Clang 4.0's -Wthread-safety warnings.
18120 They apparently require a set of annotations that we aren't
18121 currently using, and they create false positives in our pthreads
18122 wrappers. Fixes bug 20110; bugfix on 0.2.9.1-alpha.
18124 o Minor bugfixes (directory authority):
18125 - Die with a more useful error when the operator forgets to place
18126 the authority_signing_key file into the keys directory. This
18127 avoids an uninformative assert & traceback about having an invalid
18128 key. Fixes bug 20065; bugfix on 0.2.0.1-alpha.
18129 - When allowing private addresses, mark Exits that only exit to
18130 private locations as such. Fixes bug 20064; bugfix
18133 o Minor bugfixes (documentation):
18134 - Document the default PathsNeededToBuildCircuits value that's used
18135 by clients when the directory authorities don't set
18136 min_paths_for_circs_pct. Fixes bug 20117; bugfix on 02c320916e02
18137 in 0.2.4.10-alpha. Patch by teor, reported by Jesse V.
18138 - Fix manual for the User option: it takes a username, not a UID.
18139 Fixes bug 19122; bugfix on 0.0.2pre16 (the first version to have
18142 o Minor bugfixes (hidden services):
18143 - Stop logging intro point details to the client log on certain
18144 error conditions. Fixed as part of bug 20012; bugfix on
18145 0.2.4.8-alpha. Patch by teor.
18147 o Minor bugfixes (IPv6, testing):
18148 - Check for IPv6 correctly on Linux when running test networks.
18149 Fixes bug 19905; bugfix on 0.2.7.3-rc; patch by teor.
18151 o Minor bugfixes (Linux seccomp2 sandbox):
18152 - Add permission to run the sched_yield() and sigaltstack() system
18153 calls, in order to support versions of Tor compiled with asan or
18154 ubsan code that use these calls. Now "sandbox 1" and
18155 "--enable-expensive-hardening" should be compatible on more
18156 systems. Fixes bug 20063; bugfix on 0.2.5.1-alpha.
18158 o Minor bugfixes (logging):
18159 - When logging a message from the BUG() macro, be explicit about
18160 what we were asserting. Previously we were confusing what we were
18161 asserting with what the bug was. Fixes bug 20093; bugfix
18163 - When we are unable to remove the bw_accounting file, do not warn
18164 if the reason we couldn't remove it was that it didn't exist.
18165 Fixes bug 19964; bugfix on 0.2.5.4-alpha. Patch from 'pastly'.
18167 o Minor bugfixes (option parsing):
18168 - Count unix sockets when counting client listeners (SOCKS, Trans,
18169 NATD, and DNS). This has no user-visible behaviour changes: these
18170 options are set once, and never read. Required for correct
18171 behaviour in ticket 17178. Fixes bug 19677; bugfix on
18172 0.2.6.3-alpha. Patch by teor.
18174 o Minor bugfixes (options):
18175 - Check the consistency of UseEntryGuards and EntryNodes more
18176 reliably. Fixes bug 20074; bugfix on 0.2.4.12-alpha. Patch
18178 - Stop changing the configured value of UseEntryGuards on
18179 authorities and Tor2web clients. Fixes bug 20074; bugfix on
18180 commits 51fc6799 in 0.1.1.16-rc and acda1735 in 0.2.4.3-alpha.
18183 o Minor bugfixes (Tor2web):
18184 - Prevent Tor2web clients running hidden services, these services
18185 are not anonymous due to the one-hop client paths. Fixes bug
18186 19678. Patch by teor.
18188 o Minor bugfixes (unit tests):
18189 - Fix a shared-random unit test that was failing on big endian
18190 architectures due to internal representation of a integer copied
18191 to a buffer. The test is changed to take a full 32 bytes of data
18192 and use the output of a python script that make the COMMIT and
18193 REVEAL calculation according to the spec. Fixes bug 19977; bugfix
18195 - The tor_tls_server_info_callback unit test no longer crashes when
18196 debug-level logging is turned on. Fixes bug 20041; bugfix
18200 Changes in version 0.2.8.8 - 2016-09-23
18201 Tor 0.2.8.8 fixes two crash bugs present in previous versions of the
18202 0.2.8.x series. Relays running 0.2.8.x should upgrade, as should users
18203 who select public relays as their bridges.
18205 o Major bugfixes (crash):
18206 - Fix a complicated crash bug that could affect Tor clients
18207 configured to use bridges when replacing a networkstatus consensus
18208 in which one of their bridges was mentioned. OpenBSD users saw
18209 more crashes here, but all platforms were potentially affected.
18210 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
18212 o Major bugfixes (relay, OOM handler):
18213 - Fix a timing-dependent assertion failure that could occur when we
18214 tried to flush from a circuit after having freed its cells because
18215 of an out-of-memory condition. Fixes bug 20203; bugfix on
18216 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
18219 o Minor feature (fallback directories):
18220 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
18221 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
18222 2016. Closes ticket 20190; patch by teor.
18224 o Minor features (geoip):
18225 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
18229 Changes in version 0.2.9.2-alpha - 2016-08-24
18230 Tor 0.2.9.2-alpha continues development of the 0.2.9 series with
18231 several new features and bugfixes. It also includes an important
18232 authority update and an important bugfix from 0.2.8.7. Everyone who
18233 sets the ReachableAddresses option, and all bridges, are strongly
18234 encouraged to upgrade to 0.2.8.7, or to 0.2.9.2-alpha.
18236 o Directory authority changes (also in 0.2.8.7):
18237 - The "Tonga" bridge authority has been retired; the new bridge
18238 authority is "Bifroest". Closes tickets 19728 and 19690.
18240 o Major bugfixes (client, security, also in 0.2.8.7):
18241 - Only use the ReachableAddresses option to restrict the first hop
18242 in a path. In earlier versions of 0.2.8.x, it would apply to
18243 every hop in the path, with a possible degradation in anonymity
18244 for anyone using an uncommon ReachableAddress setting. Fixes bug
18245 19973; bugfix on 0.2.8.2-alpha.
18247 o Major features (user interface):
18248 - Tor now supports the ability to declare options deprecated, so
18249 that we can recommend that people stop using them. Previously,
18250 this was done in an ad-hoc way. Closes ticket 19820.
18252 o Major bugfixes (directory downloads):
18253 - Avoid resetting download status for consensuses hourly, since we
18254 already have another, smarter retry mechanism. Fixes bug 8625;
18255 bugfix on 0.2.0.9-alpha.
18257 o Minor features (config):
18258 - Warn users when descriptor and port addresses are inconsistent.
18259 Mitigates bug 13953; patch by teor.
18261 o Minor features (geoip):
18262 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
18265 o Minor features (user interface):
18266 - There is a new --list-deprecated-options command-line option to
18267 list all of the deprecated options. Implemented as part of
18270 o Minor bugfixes (code style):
18271 - Fix an integer signedness conversion issue in the case conversion
18272 tables. Fixes bug 19168; bugfix on 0.2.1.11-alpha.
18274 o Minor bugfixes (compilation):
18275 - Build correctly on versions of libevent2 without support for
18276 evutil_secure_rng_add_bytes(). Fixes bug 19904; bugfix
18278 - Fix a compilation warning on GCC versions before 4.6. Our
18279 ENABLE_GCC_WARNING macro used the word "warning" as an argument,
18280 when it is also required as an argument to the compiler pragma.
18281 Fixes bug 19901; bugfix on 0.2.9.1-alpha.
18283 o Minor bugfixes (compilation, also in 0.2.8.7):
18284 - Remove an inappropriate "inline" in tortls.c that was causing
18285 warnings on older versions of GCC. Fixes bug 19903; bugfix
18288 o Minor bugfixes (fallback directories, also in 0.2.8.7):
18289 - Avoid logging a NULL string pointer when loading fallback
18290 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
18291 and 0.2.8.1-alpha. Report and patch by "rubiate".
18293 o Minor bugfixes (logging):
18294 - Log a more accurate message when we fail to dump a microdescriptor.
18295 Fixes bug 17758; bugfix on 0.2.2.8-alpha. Patch from Daniel Pinto.
18297 o Minor bugfixes (memory leak):
18298 - Fix a series of slow memory leaks related to parsing torrc files
18299 and options. Fixes bug 19466; bugfix on 0.2.1.6-alpha.
18301 o Deprecated features:
18302 - A number of DNS-cache-related sub-options for client ports are now
18303 deprecated for security reasons, and may be removed in a future
18304 version of Tor. (We believe that client-side DNS caching is a bad
18305 idea for anonymity, and you should not turn it on.) The options
18306 are: CacheDNS, CacheIPv4DNS, CacheIPv6DNS, UseDNSCache,
18307 UseIPv4Cache, and UseIPv6Cache.
18308 - A number of options are deprecated for security reasons, and may
18309 be removed in a future version of Tor. The options are:
18310 AllowDotExit, AllowInvalidNodes, AllowSingleHopCircuits,
18311 AllowSingleHopExits, ClientDNSRejectInternalAddresses,
18312 CloseHSClientCircuitsImmediatelyOnTimeout,
18313 CloseHSServiceRendCircuitsImmediatelyOnTimeout,
18314 ExcludeSingleHopRelays, FastFirstHopPK, TLSECGroup,
18315 UseNTorHandshake, and WarnUnsafeSocks.
18316 - The *ListenAddress options are now deprecated as unnecessary: the
18317 corresponding *Port options should be used instead. These options
18318 may someday be removed. The affected options are:
18319 ControlListenAddress, DNSListenAddress, DirListenAddress,
18320 NATDListenAddress, ORListenAddress, SocksListenAddress,
18321 and TransListenAddress.
18324 - Correct the IPv6 syntax in our documentation for the
18325 VirtualAddrNetworkIPv6 torrc option. Closes ticket 19743.
18328 - We no longer include the (dead, deprecated) bufferevent code in
18329 Tor. Closes ticket 19450. Based on a patch from U+039b.
18332 Changes in version 0.2.8.7 - 2016-08-24
18333 Tor 0.2.8.7 fixes an important bug related to the ReachableAddresses
18334 option in 0.2.8.6, and replaces a retiring bridge authority. Everyone
18335 who sets the ReachableAddresses option, and all bridges, are strongly
18336 encouraged to upgrade.
18338 o Directory authority changes:
18339 - The "Tonga" bridge authority has been retired; the new bridge
18340 authority is "Bifroest". Closes tickets 19728 and 19690.
18342 o Major bugfixes (client, security):
18343 - Only use the ReachableAddresses option to restrict the first hop
18344 in a path. In earlier versions of 0.2.8.x, it would apply to
18345 every hop in the path, with a possible degradation in anonymity
18346 for anyone using an uncommon ReachableAddress setting. Fixes bug
18347 19973; bugfix on 0.2.8.2-alpha.
18349 o Minor features (geoip):
18350 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
18353 o Minor bugfixes (compilation):
18354 - Remove an inappropriate "inline" in tortls.c that was causing
18355 warnings on older versions of GCC. Fixes bug 19903; bugfix
18358 o Minor bugfixes (fallback directories):
18359 - Avoid logging a NULL string pointer when loading fallback
18360 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
18361 and 0.2.8.1-alpha. Report and patch by "rubiate".
18364 Changes in version 0.2.9.1-alpha - 2016-08-08
18365 Tor 0.2.9.1-alpha is the first alpha release in the 0.2.9 development
18366 series. It improves our support for hardened builds and compiler
18367 warnings, deploys some critical infrastructure for improvements to
18368 hidden services, includes a new timing backend that we hope to use for
18369 better support for traffic padding, makes it easier for programmers to
18370 log unexpected events, and contains other small improvements to
18371 security, correctness, and performance.
18373 Below are the changes since 0.2.8.6.
18375 o New system requirements:
18376 - Tor now requires Libevent version 2.0.10-stable or later. Older
18377 versions of Libevent have less efficient backends for several
18378 platforms, and lack the DNS code that we use for our server-side
18379 DNS support. This implements ticket 19554.
18380 - Tor now requires zlib version 1.2 or later, for security,
18381 efficiency, and (eventually) gzip support. (Back when we started,
18382 zlib 1.1 and zlib 1.0 were still found in the wild. 1.2 was
18383 released in 2003. We recommend the latest version.)
18385 o Major features (build, hardening):
18386 - Tor now builds with -ftrapv by default on compilers that support
18387 it. This option detects signed integer overflow (which C forbids),
18388 and turns it into a hard-failure. We do not apply this option to
18389 code that needs to run in constant time to avoid side-channels;
18390 instead, we use -fwrapv in that code. Closes ticket 17983.
18391 - When --enable-expensive-hardening is selected, stop applying the
18392 clang/gcc sanitizers to code that needs to run in constant time.
18393 Although we are aware of no introduced side-channels, we are not
18394 able to prove that there are none. Related to ticket 17983.
18396 o Major features (compilation):
18397 - Our big list of extra GCC warnings is now enabled by default when
18398 building with GCC (or with anything like Clang that claims to be
18399 GCC-compatible). To make all warnings into fatal compilation
18400 errors, pass --enable-fatal-warnings to configure. Closes
18402 - Use the Autoconf macro AC_USE_SYSTEM_EXTENSIONS to automatically
18403 turn on C and POSIX extensions. (Previously, we attempted to do
18404 this on an ad hoc basis.) Closes ticket 19139.
18406 o Major features (directory authorities, hidden services):
18407 - Directory authorities can now perform the shared randomness
18408 protocol specified by proposal 250. Using this protocol, directory
18409 authorities generate a global fresh random value every day. In the
18410 future, this value will be used by hidden services to select
18411 HSDirs. This release implements the directory authority feature;
18412 the hidden service side will be implemented in the future as part
18413 of proposal 224. Resolves ticket 16943; implements proposal 250.
18415 o Major features (downloading, random exponential backoff):
18416 - When we fail to download an object from a directory service, wait
18417 for an (exponentially increasing) randomized amount of time before
18418 retrying, rather than a fixed interval as we did before. This
18419 prevents a group of Tor instances from becoming too synchronized,
18420 or a single Tor instance from becoming too predictable, in its
18421 download schedule. Closes ticket 15942.
18423 o Major bugfixes (exit policies):
18424 - Avoid disclosing exit outbound bind addresses, configured port
18425 bind addresses, and local interface addresses in relay descriptors
18426 by default under ExitPolicyRejectPrivate. Instead, only reject
18427 these (otherwise unlisted) addresses if
18428 ExitPolicyRejectLocalInterfaces is set. Fixes bug 18456; bugfix on
18429 0.2.7.2-alpha. Patch by teor.
18431 o Major bugfixes (hidden service client):
18432 - Allow Tor clients with appropriate controllers to work with
18433 FetchHidServDescriptors set to 0. Previously, this option also
18434 disabled descriptor cache lookup, thus breaking hidden services
18435 entirely. Fixes bug 18704; bugfix on 0.2.0.20-rc. Patch by "twim".
18437 o Minor features (build, hardening):
18438 - Detect and work around a libclang_rt problem that would prevent
18439 clang from finding __mulodi4() on some 32-bit platforms, and thus
18440 keep -ftrapv from linking on those systems. Closes ticket 19079.
18441 - When building on a system without runtime support for the runtime
18442 hardening options, try to log a useful warning at configuration
18443 time, rather than an incomprehensible warning at link time. If
18444 expensive hardening was requested, this warning becomes an error.
18445 Closes ticket 18895.
18447 o Minor features (code safety):
18448 - In our integer-parsing functions, ensure that maxiumum value we
18449 give is no smaller than the minimum value. Closes ticket 19063;
18452 o Minor features (controller):
18453 - Implement new GETINFO queries for all downloads that use
18454 download_status_t to schedule retries. This allows controllers to
18455 examine the schedule for pending downloads. Closes ticket 19323.
18456 - Allow controllers to configure basic client authorization on
18457 hidden services when they create them with the ADD_ONION control
18458 command. Implements ticket 15588. Patch by "special".
18459 - Fire a STATUS_SERVER controller event whenever the hibernation
18460 status changes between "awake"/"soft"/"hard". Closes ticket 18685.
18462 o Minor features (directory authority):
18463 - Directory authorities now only give the Guard flag to a relay if
18464 they are also giving it the Stable flag. This change allows us to
18465 simplify path selection for clients. It should have minimal effect
18466 in practice, since >99% of Guards already have the Stable flag.
18467 Implements ticket 18624.
18468 - Directory authorities now write their v3-status-votes file out to
18469 disk earlier in the consensus process, so we have a record of the
18470 votes even if we abort the consensus process. Resolves
18473 o Minor features (hidden service):
18474 - Stop being so strict about the payload length of "rendezvous1"
18475 cells. We used to be locked in to the "TAP" handshake length, and
18476 now we can handle better handshakes like "ntor". Resolves
18479 o Minor features (infrastructure, time):
18480 - Tor now uses the operating system's monotonic timers (where
18481 available) for internal fine-grained timing. Previously we would
18482 look at the system clock, and then attempt to compensate for the
18483 clock running backwards. Closes ticket 18908.
18484 - Tor now includes an improved timer backend, so that we can
18485 efficiently support tens or hundreds of thousands of concurrent
18486 timers, as will be needed for some of our planned anti-traffic-
18487 analysis work. This code is based on William Ahern's "timeout.c"
18488 project, which implements a "tickless hierarchical timing wheel".
18489 Closes ticket 18365.
18491 o Minor features (logging):
18492 - Provide a more useful warning message when configured with an
18493 invalid Nickname. Closes ticket 18300; patch from "icanhasaccount".
18494 - When dumping unparseable router descriptors, optionally store them
18495 in separate files, named by digest, up to a configurable size
18496 limit. You can change the size limit by setting the
18497 MaxUnparseableDescSizeToLog option, and disable this feature by
18498 setting that option to 0. Closes ticket 18322.
18499 - Add a set of macros to check nonfatal assertions, for internal
18500 use. Migrating more of our checks to these should help us avoid
18501 needless crash bugs. Closes ticket 18613.
18503 o Minor features (performance):
18504 - Change the "optimistic data" extension from "off by default" to
18505 "on by default". The default was ordinarily overridden by a
18506 consensus option, but when clients were bootstrapping for the
18507 first time, they would not have a consensus to get the option
18508 from. Changing this default saves a round-trip during startup.
18509 Closes ticket 18815.
18511 o Minor features (relay, usability):
18512 - When the directory authorities refuse a bad relay's descriptor,
18513 encourage the relay operator to contact us. Many relay operators
18514 won't notice this line in their logs, but it's a win if even a few
18515 learn why we don't like what their relay was doing. Resolves
18518 o Minor features (testing):
18519 - Let backtrace tests work correctly under AddressSanitizer. Fixes
18520 part of bug 18934; bugfix on 0.2.5.2-alpha.
18521 - Move the test-network.sh script to chutney, and modify tor's test-
18522 network.sh to call the (newer) chutney version when available.
18523 Resolves ticket 19116. Patch by teor.
18524 - Use the lcov convention for marking lines as unreachable, so that
18525 we don't count them when we're generating test coverage data.
18526 Update our coverage tools to understand this convention. Closes
18529 o Minor bugfixes (bootstrap):
18530 - Remember the directory we fetched the consensus or previous
18531 certificates from, and use it to fetch future authority
18532 certificates. This change improves bootstrapping performance.
18533 Fixes bug 18963; bugfix on 0.2.8.1-alpha.
18535 o Minor bugfixes (build):
18536 - The test-stem and test-network makefile targets now depend only on
18537 the tor binary that they are testing. Previously, they depended on
18538 "make all". Fixes bug 18240; bugfix on 0.2.8.2-alpha. Based on a
18539 patch from "cypherpunks".
18541 o Minor bugfixes (circuits):
18542 - Make sure extend_info_from_router() is only called on servers.
18543 Fixes bug 19639; bugfix on 0.2.8.1-alpha.
18545 o Minor bugfixes (compilation):
18546 - When building with Clang, use a full set of GCC warnings.
18547 (Previously, we included only a subset, because of the way we
18548 detected them.) Fixes bug 19216; bugfix on 0.2.0.1-alpha.
18550 o Minor bugfixes (directory authority):
18551 - Authorities now sort the "package" lines in their votes, for ease
18552 of debugging. (They are already sorted in consensus documents.)
18553 Fixes bug 18840; bugfix on 0.2.6.3-alpha.
18554 - When parsing a detached signature, make sure we use the length of
18555 the digest algorithm instead of an hardcoded DIGEST256_LEN in
18556 order to avoid comparing bytes out-of-bounds with a smaller digest
18557 length such as SHA1. Fixes bug 19066; bugfix on 0.2.2.6-alpha.
18559 o Minor bugfixes (documentation):
18560 - Document the --passphrase-fd option in the tor manpage. Fixes bug
18561 19504; bugfix on 0.2.7.3-rc.
18562 - Fix the description of the --passphrase-fd option in the
18563 tor-gencert manpage. The option is used to pass the number of a
18564 file descriptor to read the passphrase from, not to read the file
18565 descriptor from. Fixes bug 19505; bugfix on 0.2.0.20-alpha.
18567 o Minor bugfixes (ephemeral hidden service):
18568 - When deleting an ephemeral hidden service, close its intro points
18569 even if they are not completely open. Fixes bug 18604; bugfix
18572 o Minor bugfixes (guard selection):
18573 - Use a single entry guard even if the NumEntryGuards consensus
18574 parameter is not provided. Fixes bug 17688; bugfix
18576 - Don't mark guards as unreachable if connection_connect() fails.
18577 That function fails for local reasons, so it shouldn't reveal
18578 anything about the status of the guard. Fixes bug 14334; bugfix
18581 o Minor bugfixes (hidden service client):
18582 - Increase the minimum number of internal circuits we preemptively
18583 build from 2 to 3, so a circuit is available when a client
18584 connects to another onion service. Fixes bug 13239; bugfix
18587 o Minor bugfixes (logging):
18588 - When logging a directory ownership mismatch, log the owning
18589 username correctly. Fixes bug 19578; bugfix on 0.2.2.29-beta.
18591 o Minor bugfixes (memory leaks):
18592 - Fix a small, uncommon memory leak that could occur when reading a
18593 truncated ed25519 key file. Fixes bug 18956; bugfix
18596 o Minor bugfixes (testing):
18597 - Allow clients to retry HSDirs much faster in test networks. Fixes
18598 bug 19702; bugfix on 0.2.7.1-alpha. Patch by teor.
18599 - Disable ASAN's detection of segmentation faults while running
18600 test_bt.sh, so that we can make sure that our own backtrace
18601 generation code works. Fixes another aspect of bug 18934; bugfix
18602 on 0.2.5.2-alpha. Patch from "cypherpunks".
18603 - Fix the test-network-all target on out-of-tree builds by using the
18604 correct path to the test driver script. Fixes bug 19421; bugfix
18607 o Minor bugfixes (time):
18608 - Improve overflow checks in tv_udiff and tv_mdiff. Fixes bug 19483;
18609 bugfix on all released tor versions.
18610 - When computing the difference between two times in milliseconds,
18611 we now round to the nearest millisecond correctly. Previously, we
18612 could sometimes round in the wrong direction. Fixes bug 19428;
18613 bugfix on 0.2.2.2-alpha.
18615 o Minor bugfixes (user interface):
18616 - Display a more accurate number of suppressed messages in the log
18617 rate-limiter. Previously, there was a potential integer overflow
18618 in the counter. Now, if the number of messages hits a maximum, the
18619 rate-limiter doesn't count any further. Fixes bug 19435; bugfix
18621 - Fix a typo in the passphrase prompt for the ed25519 identity key.
18622 Fixes bug 19503; bugfix on 0.2.7.2-alpha.
18624 o Code simplification and refactoring:
18625 - Remove redundant declarations of the MIN macro. Closes
18627 - Rename tor_dup_addr() to tor_addr_to_str_dup() to avoid confusion.
18628 Closes ticket 18462; patch from "icanhasaccount".
18629 - Split the 600-line directory_handle_command_get function into
18630 separate functions for different URL types. Closes ticket 16698.
18633 - Fix spelling of "--enable-tor2web-mode" in the manpage. Closes
18634 ticket 19153. Patch from "U+039b".
18636 o Removed features:
18637 - Remove support for "GET /tor/bytes.txt" DirPort request, and
18638 "GETINFO dir-usage" controller request, which were only available
18639 via a compile-time option in Tor anyway. Feature was added in
18640 0.2.2.1-alpha. Resolves ticket 19035.
18641 - There is no longer a compile-time option to disable support for
18642 TransPort. (If you don't want TransPort; just don't use it.) Patch
18643 from "U+039b". Closes ticket 19449.
18646 - Run more workqueue tests as part of "make check". These had
18647 previously been implemented, but you needed to know special
18648 command-line options to enable them.
18649 - We now have unit tests for our code to reject zlib "compression
18650 bombs". (Fortunately, the code works fine.)
18653 Changes in version 0.2.8.6 - 2016-08-02
18655 Tor 0.2.8.6 is the first stable version of the Tor 0.2.8 series.
18657 The Tor 0.2.8 series improves client bootstrapping performance,
18658 completes the authority-side implementation of improved identity
18659 keys for relays, and includes numerous bugfixes and performance
18660 improvements throughout the program. This release continues to
18661 improve the coverage of Tor's test suite. For a full list of
18662 changes since Tor 0.2.7, see the ReleaseNotes file.
18664 Changes since 0.2.8.5-rc:
18666 o Minor features (geoip):
18667 - Update geoip and geoip6 to the July 6 2016 Maxmind GeoLite2
18670 o Minor bugfixes (compilation):
18671 - Fix a compilation warning in the unit tests on systems where char
18672 is signed. Fixes bug 19682; bugfix on 0.2.8.1-alpha.
18674 o Minor bugfixes (fallback directories):
18675 - Remove 1 fallback that was on the hardcoded list, then opted-out,
18676 leaving 89 of the 100 fallbacks originally introduced in Tor
18677 0.2.8.2-alpha in March 2016. Closes ticket 19782; patch by teor.
18679 o Minor bugfixes (Linux seccomp2 sandbox):
18680 - Allow more syscalls when running with "Sandbox 1" enabled:
18681 sysinfo, getsockopt(SO_SNDBUF), and setsockopt(SO_SNDBUFFORCE). On
18682 some systems, these are required for Tor to start. Fixes bug
18683 18397; bugfix on 0.2.5.1-alpha. Patch from Daniel Pinto.
18684 - Allow IPPROTO_UDP datagram sockets when running with "Sandbox 1",
18685 so that get_interface_address6_via_udp_socket_hack() can work.
18686 Fixes bug 19660; bugfix on 0.2.5.1-alpha.
18689 Changes in version 0.2.8.5-rc - 2016-07-07
18690 Tor 0.2.8.5-rc is the second release candidate in the Tor 0.2.8
18691 series. If we find no new bugs or regressions here, the first stable
18692 0.2.8 release will be identical to it. It has a few small bugfixes
18693 against previous versions.
18695 o Directory authority changes:
18696 - Urras is no longer a directory authority. Closes ticket 19271.
18698 o Major bugfixes (heartbeat):
18699 - Fix a regression that would crash Tor when the periodic
18700 "heartbeat" log messages were disabled. Fixes bug 19454; bugfix on
18701 0.2.8.1-alpha. Reported by "kubaku".
18703 o Minor features (build):
18704 - Tor now again builds with the recent OpenSSL 1.1 development
18705 branch (tested against 1.1.0-pre6-dev). Closes ticket 19499.
18706 - When building manual pages, set the timezone to "UTC", so that the
18707 output is reproducible. Fixes bug 19558; bugfix on 0.2.2.9-alpha.
18708 Patch from intrigeri.
18710 o Minor bugfixes (fallback directory selection):
18711 - Avoid errors during fallback selection if there are no eligible
18712 fallbacks. Fixes bug 19480; bugfix on 0.2.8.3-alpha. Patch
18715 o Minor bugfixes (IPv6, microdescriptors):
18716 - Don't check node addresses when we only have a routerstatus. This
18717 allows IPv6-only clients to bootstrap by fetching microdescriptors
18718 from fallback directory mirrors. (The microdescriptor consensus
18719 has no IPv6 addresses in it.) Fixes bug 19608; bugfix
18722 o Minor bugfixes (logging):
18723 - Reduce pointlessly verbose log messages when directory servers
18724 can't be found. Fixes bug 18849; bugfix on 0.2.8.3-alpha and
18725 0.2.8.1-alpha. Patch by teor.
18726 - When a fallback directory changes its fingerprint from the hard-
18727 coded fingerprint, log a less severe, more explanatory log
18728 message. Fixes bug 18812; bugfix on 0.2.8.1-alpha. Patch by teor.
18730 o Minor bugfixes (Linux seccomp2 sandboxing):
18731 - Allow statistics to be written to disk when "Sandbox 1" is
18732 enabled. Fixes bugs 19556 and 19957; bugfix on 0.2.5.1-alpha and
18733 0.2.6.1-alpha respectively.
18735 o Minor bugfixes (user interface):
18736 - Remove a warning message "Service [scrubbed] not found after
18737 descriptor upload". This message appears when one uses HSPOST
18738 control command to upload a service descriptor. Since there is
18739 only a descriptor and no service, showing this message is
18740 pointless and confusing. Fixes bug 19464; bugfix on 0.2.7.2-alpha.
18742 o Fallback directory list:
18743 - Add a comment to the generated fallback directory list that
18744 explains how to comment out unsuitable fallbacks in a way that's
18745 compatible with the stem fallback parser.
18746 - Update fallback whitelist and blacklist based on relay operator
18747 emails. Blacklist unsuitable (non-working, over-volatile)
18748 fallbacks. Resolves ticket 19071. Patch by teor.
18749 - Remove 10 unsuitable fallbacks, leaving 90 of the 100 fallbacks
18750 originally introduced in Tor 0.2.8.2-alpha in March 2016. Closes
18751 ticket 19071; patch by teor.
18754 Changes in version 0.2.8.4-rc - 2016-06-15
18755 Tor 0.2.8.4-rc is the first release candidate in the Tor 0.2.8 series.
18756 If we find no new bugs or regressions here, the first stable 0.2.8
18757 release will be identical to it. It has a few small bugfixes against
18760 o Major bugfixes (user interface):
18761 - Correctly give a warning in the cases where a relay is specified
18762 by nickname, and one such relay is found, but it is not officially
18763 Named. Fixes bug 19203; bugfix on 0.2.3.1-alpha.
18765 o Minor features (build):
18766 - Tor now builds once again with the recent OpenSSL 1.1 development
18767 branch (tested against 1.1.0-pre5 and 1.1.0-pre6-dev).
18769 o Minor features (geoip):
18770 - Update geoip and geoip6 to the June 7 2016 Maxmind GeoLite2
18773 o Minor bugfixes (compilation):
18774 - Cause the unit tests to compile correctly on mingw64 versions that
18775 lack sscanf. Fixes bug 19213; bugfix on 0.2.7.1-alpha.
18777 o Minor bugfixes (downloading):
18778 - Predict more correctly whether we'll be downloading over HTTP when
18779 we determine the maximum length of a URL. This should avoid a
18780 "BUG" warning about the Squid HTTP proxy and its URL limits. Fixes
18784 Changes in version 0.2.8.3-alpha - 2016-05-26
18785 Tor 0.2.8.3-alpha resolves several bugs, most of them introduced over
18786 the course of the 0.2.8 development cycle. It improves the behavior of
18787 directory clients, fixes several crash bugs, fixes a gap in compiler
18788 hardening, and allows the full integration test suite to run on
18791 o Major bugfixes (security, client, DNS proxy):
18792 - Stop a crash that could occur when a client running with DNSPort
18793 received a query with multiple address types, and the first
18794 address type was not supported. Found and fixed by Scott Dial.
18795 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
18797 o Major bugfixes (security, compilation):
18798 - Correctly detect compiler flags on systems where _FORTIFY_SOURCE
18799 is predefined. Previously, our use of -D_FORTIFY_SOURCE would
18800 cause a compiler warning, thereby making other checks fail, and
18801 needlessly disabling compiler-hardening support. Fixes one case of
18802 bug 18841; bugfix on 0.2.3.17-beta. Patch from "trudokal".
18804 o Major bugfixes (security, directory authorities):
18805 - Fix a crash and out-of-bounds write during authority voting, when
18806 the list of relays includes duplicate ed25519 identity keys. Fixes
18807 bug 19032; bugfix on 0.2.8.2-alpha.
18809 o Major bugfixes (client, bootstrapping):
18810 - Check if bootstrap consensus downloads are still needed when the
18811 linked connection attaches. This prevents tor making unnecessary
18812 begindir-style connections, which are the only directory
18813 connections tor clients make since the fix for 18483 was merged.
18814 - Fix some edge cases where consensus download connections may not
18815 have been closed, even though they were not needed. Related to fix
18817 - Make relays retry consensus downloads the correct number of times,
18818 rather than the more aggressive client retry count. Fixes part of
18820 - Stop downloading consensuses when we have a consensus, even if we
18821 don't have all the certificates for it yet. Fixes bug 18809;
18822 bugfix on 0.2.8.1-alpha. Patches by arma and teor.
18824 o Major bugfixes (directory mirrors):
18825 - Decide whether to advertise begindir support in the the same way
18826 we decide whether to advertise our DirPort. Allowing these
18827 decisions to become out-of-sync led to surprising behavior like
18828 advertising begindir support when hibernation made us not
18829 advertise a DirPort. Resolves bug 18616; bugfix on 0.2.8.1-alpha.
18832 o Major bugfixes (IPv6 bridges, client):
18833 - Actually use IPv6 addresses when selecting directory addresses for
18834 IPv6 bridges. Fixes bug 18921; bugfix on 0.2.8.1-alpha. Patch
18837 o Major bugfixes (key management):
18838 - If OpenSSL fails to generate an RSA key, do not retain a dangling
18839 pointer to the previous (uninitialized) key value. The impact here
18840 should be limited to a difficult-to-trigger crash, if OpenSSL is
18841 running an engine that makes key generation failures possible, or
18842 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
18843 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
18846 o Major bugfixes (testing):
18847 - Fix a bug that would block 'make test-network-all' on systems where
18848 IPv6 packets were lost. Fixes bug 19008; bugfix on 0.2.7.3-rc.
18849 - Avoid "WSANOTINITIALISED" warnings in the unit tests. Fixes bug 18668;
18850 bugfix on 0.2.8.1-alpha.
18852 o Minor features (clients):
18853 - Make clients, onion services, and bridge relays always use an
18854 encrypted begindir connection for directory requests. Resolves
18855 ticket 18483. Patch by "teor".
18857 o Minor features (fallback directory mirrors):
18858 - Give each fallback the same weight for client selection; restrict
18859 fallbacks to one per operator; report fallback directory detail
18860 changes when rebuilding list; add new fallback directory mirrors
18861 to the whitelist; and many other minor simplifications and fixes.
18862 Closes tasks 17905, 18749, bug 18689, and fixes part of bug 18812 on
18863 0.2.8.1-alpha; patch by "teor".
18864 - Replace the 21 fallbacks generated in January 2016 and included in
18865 Tor 0.2.8.1-alpha, with a list of 100 fallbacks generated in March
18866 2016. Closes task 17158; patch by "teor".
18868 o Minor features (geoip):
18869 - Update geoip and geoip6 to the May 4 2016 Maxmind GeoLite2
18872 o Minor bugfixes (assert, portability):
18873 - Fix an assertion failure in memarea.c on systems where "long" is
18874 shorter than the size of a pointer. Fixes bug 18716; bugfix
18877 o Minor bugfixes (bootstrap):
18878 - Consistently use the consensus download schedule for authority
18879 certificates. Fixes bug 18816; bugfix on 0.2.4.13-alpha.
18881 o Minor bugfixes (build):
18882 - Remove a pair of redundant AM_CONDITIONAL declarations from
18883 configure.ac. Fixes one final case of bug 17744; bugfix
18885 - Resolve warnings when building on systems that are concerned with
18886 signed char. Fixes bug 18728; bugfix on 0.2.7.2-alpha
18888 - When libscrypt.h is found, but no libscrypt library can be linked,
18889 treat libscrypt as absent. Fixes bug 19161; bugfix
18892 o Minor bugfixes (client):
18893 - Turn all TestingClientBootstrap* into non-testing torrc options.
18894 This changes simply renames them by removing "Testing" in front of
18895 them and they do not require TestingTorNetwork to be enabled
18896 anymore. Fixes bug 18481; bugfix on 0.2.8.1-alpha.
18897 - Make directory node selection more reliable, mainly for IPv6-only
18898 clients and clients with few reachable addresses. Fixes bug 18929;
18899 bugfix on 0.2.8.1-alpha. Patch by "teor".
18901 o Minor bugfixes (controller, microdescriptors):
18902 - Make GETINFO dir/status-vote/current/consensus conform to the
18903 control specification by returning "551 Could not open cached
18904 consensus..." when not caching consensuses. Fixes bug 18920;
18905 bugfix on 0.2.2.6-alpha.
18907 o Minor bugfixes (crypto, portability):
18908 - The SHA3 and SHAKE routines now produce the correct output on Big
18909 Endian systems. No code calls either algorithm yet, so this is
18910 primarily a build fix. Fixes bug 18943; bugfix on 0.2.8.1-alpha.
18911 - Tor now builds again with the recent OpenSSL 1.1 development
18912 branch (tested against 1.1.0-pre4 and 1.1.0-pre5-dev). Closes
18915 o Minor bugfixes (directories):
18916 - When fetching extrainfo documents, compare their SHA256 digests
18917 and Ed25519 signing key certificates with the routerinfo that led
18918 us to fetch them, rather than with the most recent routerinfo.
18919 Otherwise we generate many spurious warnings about mismatches.
18920 Fixes bug 17150; bugfix on 0.2.7.2-alpha.
18922 o Minor bugfixes (logging):
18923 - When we can't generate a signing key because OfflineMasterKey is
18924 set, do not imply that we should have been able to load it. Fixes
18925 bug 18133; bugfix on 0.2.7.2-alpha.
18926 - Stop periodic_event_dispatch() from blasting twelve lines per
18927 second at loglevel debug. Fixes bug 18729; fix on 0.2.8.1-alpha.
18928 - When rejecting a misformed INTRODUCE2 cell, only log at
18929 PROTOCOL_WARN severity. Fixes bug 18761; bugfix on 0.2.8.2-alpha.
18931 o Minor bugfixes (pluggable transports):
18932 - Avoid reporting a spurious error when we decide that we don't need
18933 to terminate a pluggable transport because it has already exited.
18934 Fixes bug 18686; bugfix on 0.2.5.5-alpha.
18936 o Minor bugfixes (pointer arithmetic):
18937 - Fix a bug in memarea_alloc() that could have resulted in remote
18938 heap write access, if Tor had ever passed an unchecked size to
18939 memarea_alloc(). Fortunately, all the sizes we pass to
18940 memarea_alloc() are pre-checked to be less than 128 kilobytes.
18941 Fixes bug 19150; bugfix on 0.2.1.1-alpha. Bug found by
18944 o Minor bugfixes (relays):
18945 - Consider more config options when relays decide whether to
18946 regenerate their descriptor. Fixes more of bug 12538; bugfix
18948 - Resolve some edge cases where we might launch an ORPort
18949 reachability check even when DisableNetwork is set. Noticed while
18950 fixing bug 18616; bugfix on 0.2.3.9-alpha.
18952 o Minor bugfixes (statistics):
18953 - We now include consensus downloads via IPv6 in our directory-
18954 request statistics. Fixes bug 18460; bugfix on 0.2.3.14-alpha.
18956 o Minor bugfixes (testing):
18957 - Allow directories in small networks to bootstrap by skipping
18958 DirPort checks when the consensus has no exits. Fixes bug 19003;
18959 bugfix on 0.2.8.1-alpha. Patch by teor.
18960 - Fix a small memory leak that would occur when the
18961 TestingEnableCellStatsEvent option was turned on. Fixes bug 18673;
18962 bugfix on 0.2.5.2-alpha.
18964 o Minor bugfixes (time handling):
18965 - When correcting a corrupt 'struct tm' value, fill in the tm_wday
18966 field. Otherwise, our unit tests crash on Windows. Fixes bug
18967 18977; bugfix on 0.2.2.25-alpha.
18970 - Document the contents of the 'datadir/keys' subdirectory in the
18971 manual page. Closes ticket 17621.
18972 - Stop recommending use of nicknames to identify relays in our
18973 MapAddress documentation. Closes ticket 18312.
18976 Changes in version 0.2.8.2-alpha - 2016-03-28
18977 Tor 0.2.8.2-alpha is the second alpha in its series. It fixes numerous
18978 bugs in earlier versions of Tor, including some that prevented
18979 authorities using Tor 0.2.7.x from running correctly. IPv6 and
18980 directory support should also be much improved.
18982 o New system requirements:
18983 - Tor no longer supports versions of OpenSSL with a broken
18984 implementation of counter mode. (This bug was present in OpenSSL
18985 1.0.0, and was fixed in OpenSSL 1.0.0a.) Tor still detects, but no
18986 longer runs with, these versions.
18987 - Tor no longer attempts to support platforms where the "time_t"
18988 type is unsigned. (To the best of our knowledge, only OpenVMS does
18989 this, and Tor has never actually built on OpenVMS.) Closes
18991 - Tor now uses Autoconf version 2.63 or later, and Automake 1.11 or
18992 later (released in 2008 and 2009 respectively). If you are
18993 building Tor from the git repository instead of from the source
18994 distribution, and your tools are older than this, you will need to
18995 upgrade. Closes ticket 17732.
18997 o Major bugfixes (security, pointers):
18998 - Avoid a difficult-to-trigger heap corruption attack when extending
18999 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
19000 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
19001 Reported by Guido Vranken.
19003 o Major bugfixes (bridges, pluggable transports):
19004 - Modify the check for OR connections to private addresses. Allow
19005 bridges on private addresses, including pluggable transports that
19006 ignore the (potentially private) address in the bridge line. Fixes
19007 bug 18517; bugfix on 0.2.8.1-alpha. Reported by gk, patch by teor.
19009 o Major bugfixes (compilation):
19010 - Repair hardened builds under the clang compiler. Previously, our
19011 use of _FORTIFY_SOURCE would conflict with clang's address
19012 sanitizer. Fixes bug 14821; bugfix on 0.2.5.4-alpha.
19014 o Major bugfixes (crash on shutdown):
19015 - Correctly handle detaching circuits from muxes when shutting down.
19016 Fixes bug 18116; bugfix on 0.2.8.1-alpha.
19017 - Fix an assert-on-exit bug related to counting memory usage in
19018 rephist.c. Fixes bug 18651; bugfix on 0.2.8.1-alpha.
19020 o Major bugfixes (crash on startup):
19021 - Fix a segfault during startup: If a Unix domain socket was
19022 configured as listener (such as a ControlSocket or a SocksPort
19023 "unix:" socket), and tor was started as root but not configured to
19024 switch to another user, tor would segfault while trying to string
19025 compare a NULL value. Fixes bug 18261; bugfix on 0.2.8.1-alpha.
19028 o Major bugfixes (dns proxy mode, crash):
19029 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
19030 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
19032 o Major bugfixes (relays, bridge clients):
19033 - Ensure relays always allow IPv4 OR and Dir connections. Ensure
19034 bridge clients use the address configured in the bridge line.
19035 Fixes bug 18348; bugfix on 0.2.8.1-alpha. Reported by sysrqb,
19038 o Major bugfixes (voting):
19039 - Actually enable support for authorities to match routers by their
19040 Ed25519 identities. Previously, the code had been written, but
19041 some debugging code that had accidentally been left in the
19042 codebase made it stay turned off. Fixes bug 17702; bugfix
19044 - When collating votes by Ed25519 identities, authorities now
19045 include a "NoEdConsensus" flag if the ed25519 value (or lack
19046 thereof) for a server does not reflect the majority consensus.
19047 Related to bug 17668; bugfix on 0.2.7.2-alpha.
19048 - When generating a vote with keypinning disabled, never include two
19049 entries for the same ed25519 identity. This bug was causing
19050 authorities to generate votes that they could not parse when a
19051 router violated key pinning by changing its RSA identity but
19052 keeping its Ed25519 identity. Fixes bug 17668; fixes part of bug
19053 18318. Bugfix on 0.2.7.2-alpha.
19055 o Minor features (security, win32):
19056 - Set SO_EXCLUSIVEADDRUSE on Win32 to avoid a local port-stealing
19057 attack. Fixes bug 18123; bugfix on all tor versions. Patch
19060 o Minor features (bug-resistance):
19061 - Make Tor survive errors involving connections without a
19062 corresponding event object. Previously we'd fail with an
19063 assertion; now we produce a log message. Related to bug 16248.
19065 o Minor features (build):
19066 - Detect systems with FreeBSD-derived kernels (such as GNU/kFreeBSD)
19067 as having possible IPFW support. Closes ticket 18448. Patch from
19068 Steven Chamberlain.
19070 o Minor features (code hardening):
19071 - Use tor_snprintf() and tor_vsnprintf() even in external and low-
19072 level code, to harden against accidental failures to NUL-
19073 terminate. Part of ticket 17852. Patch from jsturgix. Found
19076 o Minor features (crypto):
19077 - Validate the hard-coded Diffie-Hellman parameters and ensure that
19078 p is a safe prime, and g is a suitable generator. Closes
19081 o Minor features (geoip):
19082 - Update geoip and geoip6 to the March 3 2016 Maxmind GeoLite2
19085 o Minor features (hidden service directory):
19086 - Streamline relay-side hsdir handling: when relays consider whether
19087 to accept an uploaded hidden service descriptor, they no longer
19088 check whether they are one of the relays in the network that is
19089 "supposed" to handle that descriptor. Implements ticket 18332.
19091 o Minor features (IPv6):
19092 - Add ClientPreferIPv6DirPort, which is set to 0 by default. If set
19093 to 1, tor prefers IPv6 directory addresses.
19094 - Add ClientUseIPv4, which is set to 1 by default. If set to 0, tor
19095 avoids using IPv4 for client OR and directory connections.
19096 - Try harder to obey the IP version restrictions "ClientUseIPv4 0",
19097 "ClientUseIPv6 0", "ClientPreferIPv6ORPort", and
19098 "ClientPreferIPv6DirPort". Closes ticket 17840; patch by teor.
19100 o Minor features (linux seccomp2 sandbox):
19101 - Reject attempts to change our Address with "Sandbox 1" enabled.
19102 Changing Address with Sandbox turned on would never actually work,
19103 but previously it would fail in strange and confusing ways. Found
19104 while fixing 18548.
19106 o Minor features (robustness):
19107 - Exit immediately with an error message if the code attempts to use
19108 Libevent without having initialized it. This should resolve some
19109 frequently-made mistakes in our unit tests. Closes ticket 18241.
19111 o Minor features (unix domain sockets):
19112 - Add a new per-socket option, RelaxDirModeCheck, to allow creating
19113 Unix domain sockets without checking the permissions on the parent
19114 directory. (Tor checks permissions by default because some
19115 operating systems only check permissions on the parent directory.
19116 However, some operating systems do look at permissions on the
19117 socket, and tor's default check is unneeded.) Closes ticket 18458.
19120 o Minor bugfixes (exit policies, security):
19121 - Refresh an exit relay's exit policy when interface addresses
19122 change. Previously, tor only refreshed the exit policy when the
19123 configured external address changed. Fixes bug 18208; bugfix on
19124 0.2.7.3-rc. Patch by teor.
19126 o Minor bugfixes (security, hidden services):
19127 - Prevent hidden services connecting to client-supplied rendezvous
19128 addresses that are reserved as internal or multicast. Fixes bug
19129 8976; bugfix on 0.2.3.21-rc. Patch by dgoulet and teor.
19131 o Minor bugfixes (build):
19132 - Do not link the unit tests against both the testing and non-
19133 testing versions of the static libraries. Fixes bug 18490; bugfix
19135 - Avoid spurious failures from configure files related to calling
19136 exit(0) in TOR_SEARCH_LIBRARY. Fixes bug 18626; bugfix on
19137 0.2.0.1-alpha. Patch from "cypherpunks".
19138 - Silence spurious clang-scan warnings in the ed25519_donna code by
19139 explicitly initializing some objects. Fixes bug 18384; bugfix on
19140 0.2.7.2-alpha. Patch by teor.
19142 o Minor bugfixes (client, bootstrap):
19143 - Count receipt of new microdescriptors as progress towards
19144 bootstrapping. Previously, with EntryNodes set, Tor might not
19145 successfully repopulate the guard set on bootstrapping. Fixes bug
19146 16825; bugfix on 0.2.3.1-alpha.
19148 o Minor bugfixes (code correctness):
19149 - Update to the latest version of Trunnel, which tries harder to
19150 avoid generating code that can invoke memcpy(p,NULL,0). Bug found
19151 by clang address sanitizer. Fixes bug 18373; bugfix
19154 o Minor bugfixes (configuration):
19155 - Fix a tiny memory leak when parsing a port configuration ending in
19156 ":auto". Fixes bug 18374; bugfix on 0.2.3.3-alpha.
19158 o Minor bugfixes (containers):
19159 - If we somehow attempt to construct a heap with more than
19160 1073741822 elements, avoid an integer overflow when maintaining
19161 the heap property. Fixes bug 18296; bugfix on 0.1.2.1-alpha.
19163 o Minor bugfixes (correctness):
19164 - Fix a bad memory handling bug that would occur if we had queued a
19165 cell on a channel's incoming queue. Fortunately, we can't actually
19166 queue a cell like that as our code is constructed today, but it's
19167 best to avoid this kind of error, even if there isn't any code
19168 that triggers it today. Fixes bug 18570; bugfix on 0.2.4.4-alpha.
19170 o Minor bugfixes (directory):
19171 - When generating a URL for a directory server on an IPv6 address,
19172 wrap the IPv6 address in square brackets. Fixes bug 18051; bugfix
19173 on 0.2.3.9-alpha. Patch from Malek.
19175 o Minor bugfixes (fallback directory mirrors):
19176 - When requesting extrainfo descriptors from a trusted directory
19177 server, check whether it is an authority or a fallback directory
19178 which supports extrainfo descriptors. Fixes bug 18489; bugfix on
19179 0.2.4.7-alpha. Reported by atagar, patch by teor.
19181 o Minor bugfixes (hidden service, client):
19182 - Handle the case where the user makes several fast consecutive
19183 requests to the same .onion address. Previously, the first six
19184 requests would each trigger a descriptor fetch, each picking a
19185 directory (there are 6 overall) and the seventh one would fail
19186 because no directories were left, thereby triggering a close on
19187 all current directory connections asking for the hidden service.
19188 The solution here is to not close the connections if we have
19189 pending directory fetches. Fixes bug 15937; bugfix
19192 o Minor bugfixes (hidden service, control port):
19193 - Add the onion address to the HS_DESC event for the UPLOADED action
19194 both on success or failure. It was previously hardcoded with
19195 UNKNOWN. Fixes bug 16023; bugfix on 0.2.7.2-alpha.
19197 o Minor bugfixes (hidden service, directory):
19198 - Bridges now refuse "rendezvous2" (hidden service descriptor)
19199 publish attempts. Suggested by ticket 18332.
19201 o Minor bugfixes (linux seccomp2 sandbox):
19202 - Allow the setrlimit syscall, and the prlimit and prlimit64
19203 syscalls, which some libc implementations use under the hood.
19204 Fixes bug 15221; bugfix on 0.2.5.1-alpha.
19205 - Avoid a 10-second delay when starting as a client with "Sandbox 1"
19206 enabled and no DNS resolvers configured. This should help TAILS
19207 start up faster. Fixes bug 18548; bugfix on 0.2.5.1-alpha.
19208 - Fix the sandbox's interoperability with unix domain sockets under
19209 setuid. Fixes bug 18253; bugfix on 0.2.8.1-alpha.
19211 o Minor bugfixes (logging):
19212 - When logging information about an unparsable networkstatus vote or
19213 consensus, do not say "vote" when we mean consensus. Fixes bug
19214 18368; bugfix on 0.2.0.8-alpha.
19215 - Scrub service name in "unrecognized service ID" log messages.
19216 Fixes bug 18600; bugfix on 0.2.4.11-alpha.
19217 - Downgrade logs and backtraces about IP versions to info-level.
19218 Only log backtraces once each time tor runs. Assists in diagnosing
19219 bug 18351; bugfix on 0.2.8.1-alpha. Reported by sysrqb and
19220 Christian, patch by teor.
19222 o Minor bugfixes (memory safety):
19223 - Avoid freeing an uninitialized pointer when opening a socket fails
19224 in get_interface_addresses_ioctl(). Fixes bug 18454; bugfix on
19225 0.2.3.11-alpha. Reported by toralf and "cypherpunks", patch
19227 - Correctly duplicate addresses in get_interface_address6_list().
19228 Fixes bug 18454; bugfix on 0.2.8.1-alpha. Reported by toralf,
19229 patch by "cypherpunks".
19230 - Fix a memory leak in tor-gencert. Fixes part of bug 18672; bugfix
19232 - Fix a memory leak in "tor --list-fingerprint". Fixes part of bug
19233 18672; bugfix on 0.2.5.1-alpha.
19235 o Minor bugfixes (private directory):
19236 - Prevent a race condition when creating private directories. Fixes
19237 part of bug 17852; bugfix on 0.0.2pre13. Part of ticket 17852.
19238 Patch from jsturgix. Found with Flawfinder.
19240 o Minor bugfixes (test networks, IPv6):
19241 - Allow internal IPv6 addresses in descriptors in test networks.
19242 Fixes bug 17153; bugfix on 0.2.3.16-alpha. Patch by teor, reported
19245 o Minor bugfixes (testing):
19246 - We no longer disable assertions in the unit tests when coverage is
19247 enabled. Instead, we require you to say --disable-asserts-in-tests
19248 to the configure script if you need assertions disabled in the
19249 unit tests (for example, if you want to perform branch coverage).
19250 Fixes bug 18242; bugfix on 0.2.7.1-alpha.
19252 o Minor bugfixes (time parsing):
19253 - Avoid overflow in tor_timegm when parsing dates in and after 2038
19254 on platforms with 32-bit time_t. Fixes bug 18479; bugfix on
19255 0.0.2pre14. Patch by teor.
19257 o Minor bugfixes (tor-gencert):
19258 - Correctly handle the case where an authority operator enters a
19259 passphrase but sends an EOF before sending a newline. Fixes bug
19260 17443; bugfix on 0.2.0.20-rc. Found by junglefowl.
19262 o Code simplification and refactoring:
19263 - Quote all the string interpolations in configure.ac -- even those
19264 which we are pretty sure can't contain spaces. Closes ticket
19265 17744. Patch from zerosion.
19266 - Remove specialized code for non-inplace AES_CTR. 99% of our AES is
19267 inplace, so there's no need to have a separate implementation for
19268 the non-inplace code. Closes ticket 18258. Patch from Malek.
19269 - Simplify return types for some crypto functions that can't
19270 actually fail. Patch from Hassan Alsibyani. Closes ticket 18259.
19273 - Change build messages to refer to "Fedora" instead of "Fedora
19274 Core", and "dnf" instead of "yum". Closes tickets 18459 and 18426.
19275 Patches from "icanhasaccount" and "cypherpunks".
19277 o Removed features:
19278 - We no longer maintain an internal freelist in memarea.c.
19279 Allocators should be good enough to make this code unnecessary,
19280 and it's doubtful that it ever had any performance benefit.
19283 - Fix several warnings from clang's address sanitizer produced in
19285 - Treat backtrace test failures as expected on FreeBSD until we
19286 solve bug 17808. Closes ticket 18204.
19289 Changes in version 0.2.8.1-alpha - 2016-02-04
19290 Tor 0.2.8.1-alpha is the first alpha release in its series. It
19291 includes numerous small features and bugfixes against previous Tor
19292 versions, and numerous small infrastructure improvements. The most
19293 notable features are a set of improvements to the directory subsystem.
19295 o Major features (security, Linux):
19296 - When Tor starts as root on Linux and is told to switch user ID, it
19297 can now retain the capability to bind to low ports. By default,
19298 Tor will do this only when it's switching user ID and some low
19299 ports have been configured. You can change this behavior with the
19300 new option KeepBindCapabilities. Closes ticket 8195.
19302 o Major features (directory system):
19303 - When bootstrapping multiple consensus downloads at a time, use the
19304 first one that starts downloading, and close the rest. This
19305 reduces failures when authorities or fallback directories are slow
19306 or down. Together with the code for feature 15775, this feature
19307 should reduces failures due to fallback churn. Implements ticket
19308 4483. Patch by "teor". Implements IPv4 portions of proposal 210 by
19309 "mikeperry" and "teor".
19310 - Include a trial list of 21 default fallback directories, generated
19311 in January 2016, based on an opt-in survey of suitable relays.
19312 Doing this should make clients bootstrap more quickly and reliably,
19313 and reduce the load on the directory authorities. Closes ticket
19314 15775. Patch by "teor".
19315 Candidates identified using an OnionOO script by "weasel", "teor",
19316 "gsathya", and "karsten".
19317 - Previously only relays that explicitly opened a directory port
19318 (DirPort) accepted directory requests from clients. Now all
19319 relays, with and without a DirPort, accept and serve tunneled
19320 directory requests that they receive through their ORPort. You can
19321 disable this behavior using the new DirCache option. Closes
19324 o Major key updates:
19325 - Update the V3 identity key for the dannenberg directory authority:
19326 it was changed on 18 November 2015. Closes task 17906. Patch
19329 o Minor features (security, clock):
19330 - Warn when the system clock appears to move back in time (when the
19331 state file was last written in the future). Tor doesn't know that
19332 consensuses have expired if the clock is in the past. Patch by
19333 "teor". Implements ticket 17188.
19335 o Minor features (security, exit policies):
19336 - ExitPolicyRejectPrivate now rejects more private addresses by
19337 default. Specifically, it now rejects the relay's outbound bind
19338 addresses (if configured), and the relay's configured port
19339 addresses (such as ORPort and DirPort). Fixes bug 17027; bugfix on
19340 0.2.0.11-alpha. Patch by "teor".
19342 o Minor features (security, memory erasure):
19343 - Set the unused entries in a smartlist to NULL. This helped catch
19344 a (harmless) bug, and shouldn't affect performance too much.
19345 Implements ticket 17026.
19346 - Use SecureMemoryWipe() function to securely clean memory on
19347 Windows. Previously we'd use OpenSSL's OPENSSL_cleanse() function.
19348 Implements feature 17986.
19349 - Use explicit_bzero or memset_s when present. Previously, we'd use
19350 OpenSSL's OPENSSL_cleanse() function. Closes ticket 7419; patches
19351 from <logan@hackers.mu> and <selven@hackers.mu>.
19352 - Make memwipe() do nothing when passed a NULL pointer or buffer of
19353 zero size. Check size argument to memwipe() for underflow. Fixes
19354 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
19357 o Minor features (security, RNG):
19358 - Adjust Tor's use of OpenSSL's RNG APIs so that they absolutely,
19359 positively are not allowed to fail. Previously we depended on
19360 internal details of OpenSSL's behavior. Closes ticket 17686.
19361 - Never use the system entropy output directly for anything besides
19362 seeding the PRNG. When we want to generate important keys, instead
19363 of using system entropy directly, we now hash it with the PRNG
19364 stream. This may help resist certain attacks based on broken OS
19365 entropy implementations. Closes part of ticket 17694.
19366 - Use modern system calls (like getentropy() or getrandom()) to
19367 generate strong entropy on platforms that have them. Closes
19370 o Minor features (accounting):
19371 - Added two modes to the AccountingRule option: One for limiting
19372 only the number of bytes sent ("AccountingRule out"), and one for
19373 limiting only the number of bytes received ("AccountingRule in").
19374 Closes ticket 15989; patch from "unixninja92".
19376 o Minor features (build):
19377 - Since our build process now uses "make distcheck", we no longer
19378 force "make dist" to depend on "make check". Closes ticket 17893;
19379 patch from "cypherpunks."
19380 - Tor now builds successfully with the recent OpenSSL 1.1
19381 development branch, and with the latest LibreSSL. Closes tickets
19382 17549, 17921, and 17984.
19384 o Minor features (controller):
19385 - Adds the FallbackDir entries to 'GETINFO config/defaults'. Closes
19386 tickets 16774 and 17817. Patch by George Tankersley.
19387 - New 'GETINFO hs/service/desc/id/' command to retrieve a hidden
19388 service descriptor from a service's local hidden service
19389 descriptor cache. Closes ticket 14846.
19390 - Add 'GETINFO exit-policy/reject-private/[default,relay]', so
19391 controllers can examine the the reject rules added by
19392 ExitPolicyRejectPrivate. This makes it easier for stem to display
19395 o Minor features (crypto):
19396 - Add SHA512 support to crypto.c. Closes ticket 17663; patch from
19398 - Add SHA3 and SHAKE support to crypto.c. Closes ticket 17783.
19399 - When allocating a digest state object, allocate no more space than
19400 we actually need. Previously, we would allocate as much space as
19401 the state for the largest algorithm would need. This change saves
19402 up to 672 bytes per circuit. Closes ticket 17796.
19403 - Improve performance when hashing non-multiple of 8 sized buffers,
19404 based on Andrew Moon's public domain SipHash-2-4 implementation.
19405 Fixes bug 17544; bugfix on 0.2.5.3-alpha.
19407 o Minor features (directory downloads):
19408 - Wait for busy authorities and fallback directories to become non-
19409 busy when bootstrapping. (A similar change was made in 6c443e987d
19410 for directory caches chosen from the consensus.) Closes ticket
19411 17864; patch by "teor".
19412 - Add UseDefaultFallbackDirs, which enables any hard-coded fallback
19413 directory mirrors. The default is 1; set it to 0 to disable
19414 fallbacks. Implements ticket 17576. Patch by "teor".
19416 o Minor features (geoip):
19417 - Update geoip and geoip6 to the January 5 2016 Maxmind GeoLite2
19420 o Minor features (IPv6):
19421 - Add an argument 'ipv6=address:orport' to the DirAuthority and
19422 FallbackDir torrc options, to specify an IPv6 address for an
19423 authority or fallback directory. Add hard-coded ipv6 addresses for
19424 directory authorities that have them. Closes ticket 17327; patch
19425 from Nick Mathewson and "teor".
19426 - Add address policy assume_action support for IPv6 addresses.
19427 - Limit IPv6 mask bits to 128.
19428 - Warn when comparing against an AF_UNSPEC address in a policy, it's
19429 almost always a bug. Closes ticket 17863; patch by "teor".
19430 - Allow users to configure directory authorities and fallback
19431 directory servers with IPv6 addresses and ORPorts. Resolves
19433 - routerset_parse now accepts IPv6 literal addresses. Fixes bug
19434 17060; bugfix on 0.2.1.3-alpha. Patch by "teor".
19435 - Make tor_ersatz_socketpair work on IPv6-only systems. Fixes bug
19436 17638; bugfix on 0.0.2pre8. Patch by "teor".
19438 o Minor features (logging):
19439 - When logging to syslog, allow a tag to be added to the syslog
19440 identity (the string prepended to every log message). The tag can
19441 be configured with SyslogIdentityTag and defaults to none. Setting
19442 it to "foo" will cause logs to be tagged as "Tor-foo". Closes
19445 o Minor features (portability):
19446 - Use timingsafe_memcmp() where available. Closes ticket 17944;
19447 patch from <logan@hackers.mu>.
19449 o Minor features (relay, address discovery):
19450 - Add a family argument to get_interface_addresses_raw() and
19451 subfunctions to make network interface address interogation more
19452 efficient. Now Tor can specifically ask for IPv4, IPv6 or both
19453 types of interfaces from the operating system. Resolves
19455 - When get_interface_address6_list(.,AF_UNSPEC,.) is called and
19456 fails to enumerate interface addresses using the platform-specific
19457 API, have it rely on the UDP socket fallback technique to try and
19458 find out what IP addresses (both IPv4 and IPv6) our machine has.
19459 Resolves ticket 17951.
19461 o Minor features (replay cache):
19462 - The replay cache now uses SHA256 instead of SHA1. Implements
19463 feature 8961. Patch by "teor", issue reported by "rransom".
19465 o Minor features (unix file permissions):
19466 - Defer creation of Unix sockets until after setuid. This avoids
19467 needing CAP_CHOWN and CAP_FOWNER when using systemd's
19468 CapabilityBoundingSet, or chown and fowner when using SELinux.
19469 Implements part of ticket 17562. Patch from Jamie Nguyen.
19470 - If any directory created by Tor is marked as group readable, the
19471 filesystem group is allowed to be either the default GID or the
19472 root user. Allowing root to read the DataDirectory prevents the
19473 need for CAP_READ_SEARCH when using systemd's
19474 CapabilityBoundingSet, or dac_read_search when using SELinux.
19475 Implements part of ticket 17562. Patch from Jamie Nguyen.
19476 - Introduce a new DataDirectoryGroupReadable option. If it is set to
19477 1, the DataDirectory will be made readable by the default GID.
19478 Implements part of ticket 17562. Patch from Jamie Nguyen.
19480 o Minor bugfixes (accounting):
19481 - The max bandwidth when using 'AccountRule sum' is now correctly
19482 logged. Fixes bug 18024; bugfix on 0.2.6.1-alpha. Patch
19483 from "unixninja92".
19485 o Minor bugfixes (code correctness):
19486 - When closing an entry connection, generate a warning if we should
19487 have sent an end cell for it but we haven't. Fixes bug 17876;
19488 bugfix on 0.2.3.2-alpha.
19489 - Assert that allocated memory held by the reputation code is freed
19490 according to its internal counters. Fixes bug 17753; bugfix
19492 - Assert when the TLS contexts fail to initialize. Fixes bug 17683;
19495 o Minor bugfixes (compilation):
19496 - Mark all object files that include micro-revision.i as depending
19497 on it, so as to make parallel builds more reliable. Fixes bug
19498 17826; bugfix on 0.2.5.1-alpha.
19499 - Don't try to use the pthread_condattr_setclock() function unless
19500 it actually exists. Fixes compilation on NetBSD-6.x. Fixes bug
19501 17819; bugfix on 0.2.6.3-alpha.
19502 - Fix backtrace compilation on FreeBSD. Fixes bug 17827; bugfix
19504 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
19505 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
19506 - Fix search for libevent libraries on OpenBSD (and other systems
19507 that install libevent 1 and libevent 2 in parallel). Fixes bug
19508 16651; bugfix on 0.1.0.7-rc. Patch from "rubiate".
19509 - Isolate environment variables meant for tests from the rest of the
19510 build system. Fixes bug 17818; bugfix on 0.2.7.3-rc.
19511 - Replace usage of 'INLINE' with 'inline'. Fixes bug 17804; bugfix
19513 - Remove config.log only from make distclean, not from make clean.
19514 Fixes bug 17924; bugfix on 0.2.4.1-alpha.
19516 o Minor bugfixes (crypto):
19517 - Check the return value of HMAC() and assert on failure. Fixes bug
19518 17658; bugfix on 0.2.3.6-alpha. Patch by "teor".
19520 o Minor bugfixes (fallback directories):
19521 - Mark fallbacks as "too busy" when they return a 503 response,
19522 rather than just marking authorities. Fixes bug 17572; bugfix on
19523 0.2.4.7-alpha. Patch by "teor".
19525 o Minor bugfixes (IPv6):
19526 - Update the limits in max_dl_per_request for IPv6 address length.
19527 Fixes bug 17573; bugfix on 0.2.1.5-alpha.
19529 o Minor bugfixes (linux seccomp2 sandbox):
19530 - Fix a crash when using offline master ed25519 keys with the Linux
19531 seccomp2 sandbox enabled. Fixes bug 17675; bugfix on 0.2.7.3-rc.
19533 o Minor bugfixes (logging):
19534 - In log messages that include a function name, use __FUNCTION__
19535 instead of __PRETTY_FUNCTION__. In GCC, these are synonymous, but
19536 with clang __PRETTY_FUNCTION__ has extra information we don't
19537 need. Fixes bug 16563; bugfix on 0.0.2pre8. Fix by Tom van
19539 - Remove needless quotes from a log message about unparseable
19540 addresses. Fixes bug 17843; bugfix on 0.2.3.3-alpha.
19542 o Minor bugfixes (portability):
19543 - Remove an #endif from configure.ac so that we correctly detect the
19544 presence of in6_addr.s6_addr32. Fixes bug 17923; bugfix
19547 o Minor bugfixes (relays):
19548 - Check that both the ORPort and DirPort (if present) are reachable
19549 before publishing a relay descriptor. Otherwise, relays publish a
19550 descriptor with DirPort 0 when the DirPort reachability test takes
19551 longer than the ORPort reachability test. Fixes bug 18050; bugfix
19552 on 0.1.0.1-rc. Reported by "starlight", patch by "teor".
19554 o Minor bugfixes (relays, hidden services):
19555 - Refuse connection requests to private OR addresses unless
19556 ExtendAllowPrivateAddresses is set. Previously, tor would connect,
19557 then refuse to send any cells to a private address. Fixes bugs
19558 17674 and 8976; bugfix on 0.2.3.21-rc. Patch by "teor".
19560 o Minor bugfixes (safe logging):
19561 - When logging a malformed hostname received through socks4, scrub
19562 it if SafeLogging says we should. Fixes bug 17419; bugfix
19565 o Minor bugfixes (statistics code):
19566 - Consistently check for overflow in round_*_to_next_multiple_of
19567 functions, and add unit tests with additional and maximal values.
19568 Fixes part of bug 13192; bugfix on 0.2.2.1-alpha.
19569 - Handle edge cases in the laplace functions: avoid division by
19570 zero, avoid taking the log of zero, and silence clang type
19571 conversion warnings using round and trunc. Add unit tests for edge
19572 cases with maximal values. Fixes part of bug 13192; bugfix
19575 o Minor bugfixes (testing):
19576 - The test for log_heartbeat was incorrectly failing in timezones
19577 with non-integer offsets. Instead of comparing the end of the time
19578 string against a constant, compare it to the output of
19579 format_local_iso_time when given the correct input. Fixes bug
19580 18039; bugfix on 0.2.5.4-alpha.
19581 - Make unit tests pass on IPv6-only systems, and systems without
19582 localhost addresses (like some FreeBSD jails). Fixes bug 17632;
19583 bugfix on 0.2.7.3-rc. Patch by "teor".
19584 - Fix a memory leak in the ntor test. Fixes bug 17778; bugfix
19586 - Check the full results of SHA256 and SHA512 digests in the unit
19587 tests. Bugfix on 0.2.2.4-alpha. Patch by "teor".
19589 o Code simplification and refactoring:
19590 - Move logging of redundant policy entries in
19591 policies_parse_exit_policy_internal into its own function. Closes
19592 ticket 17608; patch from "juce".
19593 - Extract the more complicated parts of circuit_mark_for_close()
19594 into a new function that we run periodically before circuits are
19595 freed. This change removes more than half of the functions
19596 currently in the "blob". Closes ticket 17218.
19597 - Clean up a little duplicated code in
19598 crypto_expand_key_material_TAP(). Closes ticket 17587; patch
19600 - Decouple the list of streams waiting to be attached to circuits
19601 from the overall connection list. This change makes it possible to
19602 attach streams quickly while simplifying Tor's callgraph and
19603 avoiding O(N) scans of the entire connection list. Closes
19605 - When a direct directory request fails immediately on launch,
19606 instead of relaunching that request from inside the code that
19607 launches it, instead mark the connection for teardown. This change
19608 simplifies Tor's callback and prevents the directory-request
19609 launching code from invoking itself recursively. Closes
19611 - Remove code for configuring OpenSSL dynamic locks; OpenSSL doesn't
19612 use them. Closes ticket 17926.
19615 - Add a description of the correct use of the '--keygen' command-
19616 line option. Closes ticket 17583; based on text by 's7r'.
19617 - Document the minimum HeartbeatPeriod value. Closes ticket 15638.
19618 - Explain actual minima for BandwidthRate. Closes ticket 16382.
19619 - Fix a minor formatting typo in the manpage. Closes ticket 17791.
19620 - Mention torspec URL in the manpage and point the reader to it
19621 whenever we mention a document that belongs in torspce. Fixes
19624 o Removed features:
19625 - Remove client-side support for connecting to Tor relays running
19626 versions of Tor before 0.2.3.6-alpha. These relays didn't support
19627 the v3 TLS handshake protocol, and are no longer allowed on the
19628 Tor network. Implements the client side of ticket 11150. Based on
19629 patches by Tom van der Woerdt.
19632 - Add unit tests to check for common RNG failure modes, such as
19633 returning all zeroes, identical values, or incrementing values
19634 (OpenSSL's rand_predictable feature). Patch by "teor".
19635 - Log more information when the backtrace tests fail. Closes ticket
19636 17892. Patch from "cypherpunks."
19637 - Always test both ed25519 backends, so that we can be sure that our
19638 batch-open replacement code works. Part of ticket 16794.
19639 - Cover dns_resolve_impl() in dns.c with unit tests. Implements a
19640 portion of ticket 16831.
19641 - More unit tests for compat_libevent.c, procmon.c, tortls.c,
19642 util_format.c, directory.c, and options_validate.c. Closes tickets
19643 17075, 17082, 17084, 17003, and 17076 respectively. Patches from
19645 - Unit tests for directory_handle_command_get. Closes ticket 17004.
19646 Patch from Reinaldo de Souza Jr.
19649 Changes in version 0.2.7.6 - 2015-12-10
19650 Tor version 0.2.7.6 fixes a major bug in entry guard selection, as
19651 well as a minor bug in hidden service reliability.
19653 o Major bugfixes (guard selection):
19654 - Actually look at the Guard flag when selecting a new directory
19655 guard. When we implemented the directory guard design, we
19656 accidentally started treating all relays as if they have the Guard
19657 flag during guard selection, leading to weaker anonymity and worse
19658 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
19661 o Minor features (geoip):
19662 - Update geoip and geoip6 to the December 1 2015 Maxmind GeoLite2
19665 o Minor bugfixes (compilation):
19666 - When checking for net/pfvar.h, include netinet/in.h if possible.
19667 This fixes transparent proxy detection on OpenBSD. Fixes bug
19668 17551; bugfix on 0.1.2.1-alpha. Patch from "rubiate".
19669 - Fix a compilation warning with Clang 3.6: Do not check the
19670 presence of an address which can never be NULL. Fixes bug 17781.
19672 o Minor bugfixes (correctness):
19673 - When displaying an IPv6 exit policy, include the mask bits
19674 correctly even when the number is greater than 31. Fixes bug
19675 16056; bugfix on 0.2.4.7-alpha. Patch from "gturner".
19676 - The wrong list was used when looking up expired intro points in a
19677 rend service object, causing what we think could be reachability
19678 issues for hidden services, and triggering a BUG log. Fixes bug
19679 16702; bugfix on 0.2.7.2-alpha.
19680 - Fix undefined behavior in the tor_cert_checksig function. Fixes
19681 bug 17722; bugfix on 0.2.7.2-alpha.
19684 Changes in version 0.2.7.5 - 2015-11-20
19685 The Tor 0.2.7 release series is dedicated to the memory of Tor user
19686 and privacy advocate Caspar Bowden (1961-2015). Caspar worked
19687 tirelessly to advocate human rights regardless of national borders,
19688 and oppose the encroachments of mass surveillance. He opposed national
19689 exceptionalism, he brought clarity to legal and policy debates, he
19690 understood and predicted the impact of mass surveillance on the world,
19691 and he laid the groundwork for resisting it. While serving on the Tor
19692 Project's board of directors, he brought us his uncompromising focus
19693 on technical excellence in the service of humankind. Caspar was an
19694 inimitable force for good and a wonderful friend. He was kind,
19695 humorous, generous, gallant, and believed we should protect one
19696 another without exception. We honor him here for his ideals, his
19697 efforts, and his accomplishments. Please honor his memory with works
19698 that would make him proud.
19700 Tor 0.2.7.5 is the first stable release in the Tor 0.2.7 series.
19702 The 0.2.7 series adds a more secure identity key type for relays,
19703 improves cryptography performance, resolves several longstanding
19704 hidden-service performance issues, improves controller support for
19705 hidden services, and includes small bugfixes and performance
19706 improvements throughout the program. This release series also includes
19707 more tests than before, and significant simplifications to which parts
19708 of Tor invoke which others.
19710 (This release contains no code changes since 0.2.7.4-rc.)
19713 Changes in version 0.2.7.4-rc - 2015-10-21
19714 Tor 0.2.7.4-rc is the second release candidate in the 0.2.7 series. It
19715 fixes some important memory leaks, and a scary-looking (but mostly
19716 harmless in practice) invalid-read bug. It also has a few small
19717 bugfixes, notably fixes for compilation and portability on different
19718 platforms. If no further significant bounds are found, the next
19719 release will the the official stable release.
19721 o Major bugfixes (security, correctness):
19722 - Fix an error that could cause us to read 4 bytes before the
19723 beginning of an openssl string. This bug could be used to cause
19724 Tor to crash on systems with unusual malloc implementations, or
19725 systems with unusual hardening installed. Fixes bug 17404; bugfix
19728 o Major bugfixes (correctness):
19729 - Fix a use-after-free bug in validate_intro_point_failure(). Fixes
19730 bug 17401; bugfix on 0.2.7.3-rc.
19732 o Major bugfixes (memory leaks):
19733 - Fix a memory leak in ed25519 batch signature checking. Fixes bug
19734 17398; bugfix on 0.2.6.1-alpha.
19735 - Fix a memory leak in rend_cache_failure_entry_free(). Fixes bug
19736 17402; bugfix on 0.2.7.3-rc.
19737 - Fix a memory leak when reading an expired signing key from disk.
19738 Fixes bug 17403; bugfix on 0.2.7.2-rc.
19740 o Minor features (geoIP):
19741 - Update geoip and geoip6 to the October 9 2015 Maxmind GeoLite2
19744 o Minor bugfixes (compilation):
19745 - Repair compilation with the most recent (unreleased, alpha)
19746 vesions of OpenSSL 1.1. Fixes part of ticket 17237.
19747 - Fix an integer overflow warning in test_crypto_slow.c. Fixes bug
19748 17251; bugfix on 0.2.7.2-alpha.
19749 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
19750 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
19752 o Minor bugfixes (portability):
19753 - Use libexecinfo on FreeBSD to enable backtrace support. Fixes
19754 part of bug 17151; bugfix on 0.2.5.2-alpha. Patch from
19757 o Minor bugfixes (sandbox):
19758 - Add the "hidserv-stats" filename to our sandbox filter for the
19759 HiddenServiceStatistics option to work properly. Fixes bug 17354;
19760 bugfix on 0.2.6.2-alpha. Patch from David Goulet.
19762 o Minor bugfixes (testing):
19763 - Add unit tests for get_interface_address* failure cases. Fixes bug
19764 17173; bugfix on 0.2.7.3-rc. Patch by fk/teor.
19765 - Fix breakage when running 'make check' with BSD make. Fixes bug
19766 17154; bugfix on 0.2.7.3-rc. Patch by Marcin Cieślak.
19767 - Make the get_ifaddrs_* unit tests more tolerant of different
19768 network configurations. (Don't assume every test box has an IPv4
19769 address, and don't assume every test box has a non-localhost
19770 address.) Fixes bug 17255; bugfix on 0.2.7.3-rc. Patch by "teor".
19771 - Skip backtrace tests when backtrace support is not compiled in.
19772 Fixes part of bug 17151; bugfix on 0.2.7.1-alpha. Patch from
19776 - Fix capitalization of SOCKS in sample torrc. Closes ticket 15609.
19777 - Note that HiddenServicePorts can take a unix domain socket. Closes
19781 Changes in version 0.2.7.3-rc - 2015-09-25
19782 Tor 0.2.7.3-rc is the first release candidate in the 0.2.7 series. It
19783 contains numerous usability fixes for Ed25519 keys, safeguards against
19784 several misconfiguration problems, significant simplifications to
19785 Tor's callgraph, and numerous bugfixes and small features.
19787 This is the most tested release of Tor to date. The unit tests cover
19788 39.40% of the code, and the integration tests (accessible with "make
19789 test-full-online", requiring stem and chutney and a network
19790 connection) raise the coverage to 64.49%.
19792 o Major features (security, hidden services):
19793 - Hidden services, if using the EntryNodes option, are required to
19794 use more than one EntryNode, in order to avoid a guard discovery
19795 attack. (This would only affect people who had configured hidden
19796 services and manually specified the EntryNodes option with a
19797 single entry-node. The impact was that it would be easy to
19798 remotely identify the guard node used by such a hidden service.
19799 See ticket for more information.) Fixes ticket 14917.
19801 o Major features (Ed25519 keys, keypinning):
19802 - The key-pinning option on directory authorities is now advisory-
19803 only by default. In a future version, or when the AuthDirPinKeys
19804 option is set, pins are enforced again. Disabling key-pinning
19805 seemed like a good idea so that we can survive the fallout of any
19806 usability problems associated with Ed25519 keys. Closes
19809 o Major features (Ed25519 performance):
19810 - Improve the speed of Ed25519 operations and Curve25519 keypair
19811 generation when built targeting 32 bit x86 platforms with SSE2
19812 available. Implements ticket 16535.
19813 - Improve the runtime speed of Ed25519 signature verification by
19814 using Ed25519-donna's batch verification support. Implements
19817 o Major features (performance testing):
19818 - The test-network.sh script now supports performance testing.
19819 Requires corresponding chutney performance testing changes. Patch
19820 by "teor". Closes ticket 14175.
19822 o Major features (relay, Ed25519):
19823 - Significant usability improvements for Ed25519 key management. Log
19824 messages are better, and the code can recover from far more
19825 failure conditions. Thanks to "s7r" for reporting and diagnosing
19827 - Add a new OfflineMasterKey option to tell Tor never to try loading
19828 or generating a secret Ed25519 identity key. You can use this in
19829 combination with tor --keygen to manage offline and/or encrypted
19830 Ed25519 keys. Implements ticket 16944.
19831 - Add a --newpass option to allow changing or removing the
19832 passphrase of an encrypted key with tor --keygen. Implements part
19834 - On receiving a HUP signal, check to see whether the Ed25519
19835 signing key has changed, and reload it if so. Closes ticket 16790.
19837 o Major bugfixes (relay, Ed25519):
19838 - Avoid crashing on 'tor --keygen'. Fixes bug 16679; bugfix on
19839 0.2.7.2-alpha. Reported by "s7r".
19840 - Improve handling of expired signing keys with offline master keys.
19841 Fixes bug 16685; bugfix on 0.2.7.2-alpha. Reported by "s7r".
19843 o Minor features (client-side privacy):
19844 - New KeepAliveIsolateSOCKSAuth option to indefinitely extend circuit
19845 lifespan when IsolateSOCKSAuth and streams with SOCKS
19846 authentication are attached to the circuit. This allows
19847 applications like TorBrowser to manage circuit lifetime on their
19848 own. Implements feature 15482.
19849 - When logging malformed hostnames from SOCKS5 requests, respect
19850 SafeLogging configuration. Fixes bug 16891; bugfix on 0.1.1.16-rc.
19852 o Minor features (compilation):
19853 - Give a warning as early as possible when trying to build with an
19854 unsupported OpenSSL version. Closes ticket 16901.
19855 - Fail during configure if we're trying to build against an OpenSSL
19856 built without ECC support. Fixes bug 17109, bugfix on 0.2.7.1-alpha
19857 which started requiring ECC.
19859 o Minor features (geoip):
19860 - Update geoip and geoip6 to the September 3 2015 Maxmind GeoLite2
19863 o Minor features (hidden services):
19864 - Relays need to have the Fast flag to get the HSDir flag. As this
19865 is being written, we'll go from 2745 HSDirs down to 2342, a ~14%
19866 drop. This change should make some attacks against the hidden
19867 service directory system harder. Fixes ticket 15963.
19868 - Turn on hidden service statistics collection by setting the torrc
19869 option HiddenServiceStatistics to "1" by default. (This keeps
19870 track only of the fraction of traffic used by hidden services, and
19871 the total number of hidden services in existence.) Closes
19873 - Client now uses an introduction point failure cache to know when
19874 to fetch or keep a descriptor in their cache. Previously, failures
19875 were recorded implicitly, but not explicitly remembered. Closes
19878 o Minor features (testing, authorities, documentation):
19879 - New TestingDirAuthVote{Exit,Guard,HSDir}IsStrict flags to
19880 explicitly manage consensus flags in testing networks. Patch by
19881 "robgjansen", modified by "teor". Implements part of ticket 14882.
19883 o Minor bugfixes (security, exit policies):
19884 - ExitPolicyRejectPrivate now also rejects the relay's published
19885 IPv6 address (if any), and any publicly routable IPv4 or IPv6
19886 addresses on any local interfaces. ticket 17027. Patch by "teor".
19887 Fixes bug 17027; bugfix on 0.2.0.11-alpha.
19889 o Minor bug fixes (torrc exit policies):
19890 - In torrc, "accept6 *" and "reject6 *" ExitPolicy lines now only
19891 produce IPv6 wildcard addresses. Previously they would produce
19892 both IPv4 and IPv6 wildcard addresses. Patch by "teor". Fixes part
19893 of bug 16069; bugfix on 0.2.4.7-alpha.
19894 - When parsing torrc ExitPolicies, we now warn for a number of cases
19895 where the user's intent is likely to differ from Tor's actual
19896 behavior. These include: using an IPv4 address with an accept6 or
19897 reject6 line; using "private" on an accept6 or reject6 line; and
19898 including any ExitPolicy lines after accept *:* or reject *:*.
19899 Related to ticket 16069.
19900 - When parsing torrc ExitPolicies, we now issue an info-level
19901 message when expanding an "accept/reject *" line to include both
19902 IPv4 and IPv6 wildcard addresses. Related to ticket 16069.
19903 - In each instance above, usage advice is provided to avoid the
19904 message. Resolves ticket 16069. Patch by "teor". Fixes part of bug
19905 16069; bugfix on 0.2.4.7-alpha.
19907 o Minor bugfixes (authority):
19908 - Don't assign "HSDir" to a router if it isn't Valid and Running.
19909 Fixes bug 16524; bugfix on 0.2.7.2-alpha.
19910 - Downgrade log messages about Ed25519 key issues if they are in old
19911 cached router descriptors. Fixes part of bug 16286; bugfix
19913 - When we find an Ed25519 key issue in a cached descriptor, stop
19914 saying the descriptor was just "uploaded". Fixes another part of
19915 bug 16286; bugfix on 0.2.7.2-alpha.
19917 o Minor bugfixes (control port):
19918 - Repair a warning and a spurious result when getting the maximum
19919 number of file descriptors from the controller. Fixes bug 16697;
19920 bugfix on 0.2.7.2-alpha.
19922 o Minor bugfixes (correctness):
19923 - When calling channel_free_list(), avoid calling smartlist_remove()
19924 while inside a FOREACH loop. This partially reverts commit
19925 17356fe7fd96af where the correct SMARTLIST_DEL_CURRENT was
19926 incorrectly removed. Fixes bug 16924; bugfix on 0.2.4.4-alpha.
19928 o Minor bugfixes (documentation):
19929 - Advise users on how to configure separate IPv4 and IPv6 exit
19930 policies in the manpage and sample torrcs. Related to ticket 16069.
19931 - Fix the usage message of tor-resolve(1) so that it no longer lists
19932 the removed -F option. Fixes bug 16913; bugfix on 0.2.2.28-beta.
19933 - Fix an error in the manual page and comments for
19934 TestingDirAuthVoteHSDir[IsStrict], which suggested that a HSDir
19935 required "ORPort connectivity". While this is true, it is in no
19936 way unique to the HSDir flag. Of all the flags, only HSDirs need a
19937 DirPort configured in order for the authorities to assign that
19938 particular flag. Patch by "teor". Fixed as part of 14882; bugfix
19941 o Minor bugfixes (Ed25519):
19942 - Fix a memory leak when reading router descriptors with expired
19943 Ed25519 certificates. Fixes bug 16539; bugfix on 0.2.7.2-alpha.
19945 o Minor bugfixes (linux seccomp2 sandbox):
19946 - Allow bridge authorities to run correctly under the seccomp2
19947 sandbox. Fixes bug 16964; bugfix on 0.2.5.1-alpha.
19948 - Allow routers with ed25519 keys to run correctly under the
19949 seccomp2 sandbox. Fixes bug 16965; bugfix on 0.2.7.2-alpha.
19951 o Minor bugfixes (open file limit):
19952 - Fix set_max_file_descriptors() to set by default the max open file
19953 limit to the current limit when setrlimit() fails. Fixes bug
19954 16274; bugfix on 0.2.0.10-alpha. Patch by dgoulet.
19956 o Minor bugfixes (portability):
19957 - Try harder to normalize the exit status of the Tor process to the
19958 standard-provided range. Fixes bug 16975; bugfix on every version
19960 - Check correctly for Windows socket errors in the workqueue
19961 backend. Fixes bug 16741; bugfix on 0.2.6.3-alpha.
19962 - Fix the behavior of crypto_rand_time_range() when told to consider
19963 times before 1970. (These times were possible when running in a
19964 simulated network environment where time()'s output starts at
19965 zero.) Fixes bug 16980; bugfix on 0.2.7.1-alpha.
19966 - Restore correct operation of TLS client-cipher detection on
19967 OpenSSL 1.1. Fixes bug 14047; bugfix on 0.2.7.2-alpha.
19969 o Minor bugfixes (relay):
19970 - Ensure that worker threads actually exit when a fatal error or
19971 shutdown is indicated. This fix doesn't currently affect the
19972 behavior of Tor, because Tor workers never indicates fatal error
19973 or shutdown except in the unit tests. Fixes bug 16868; bugfix
19975 - Unblock threads before releasing the work queue mutex to ensure
19976 predictable scheduling behavior. Fixes bug 16644; bugfix
19979 o Code simplification and refactoring:
19980 - Change the function that's called when we need to retry all
19981 downloads so that it only reschedules the downloads to happen
19982 immediately, rather than launching them all at once itself. This
19983 further simplifies Tor's callgraph.
19984 - Move some format-parsing functions out of crypto.c and
19985 crypto_curve25519.c into crypto_format.c and/or util_format.c.
19986 - Move the client-only parts of init_keys() into a separate
19987 function. Closes ticket 16763.
19988 - Simplify the microdesc_free() implementation so that it no longer
19989 appears (to code analysis tools) to potentially invoke a huge
19990 suite of other microdesc functions.
19991 - Simply the control graph further by deferring the inner body of
19992 directory_all_unreachable() into a callback. Closes ticket 16762.
19993 - Treat the loss of an owning controller as equivalent to a SIGTERM
19994 signal. This removes a tiny amount of duplicated code, and
19995 simplifies our callgraph. Closes ticket 16788.
19996 - When generating an event to send to the controller, we no longer
19997 put the event over the network immediately. Instead, we queue
19998 these events, and use a Libevent callback to deliver them. This
19999 change simplifies Tor's callgraph by reducing the number of
20000 functions from which all other Tor functions are reachable. Closes
20002 - Wrap Windows-only C files inside '#ifdef _WIN32' so that tools
20003 that try to scan or compile every file on Unix won't decide that
20005 - Remove the unused "nulterminate" argument from buf_pullup().
20008 - Recommend a 40 GB example AccountingMax in torrc.sample rather
20009 than a 4 GB max. Closes ticket 16742.
20010 - Include the TUNING document in our source tarball. It is referred
20011 to in the ChangeLog and an error message. Fixes bug 16929; bugfix
20015 - The internal pure-C tor-fw-helper tool is now removed from the Tor
20016 distribution, in favor of the pure-Go clone available from
20017 https://gitweb.torproject.org/tor-fw-helper.git/ . The libraries
20018 used by the C tor-fw-helper are not, in our opinion, very
20019 confidence- inspiring in their secure-programming techniques.
20020 Closes ticket 13338.
20021 - Remove the code that would try to aggressively flush controller
20022 connections while writing to them. This code was introduced in
20023 0.1.2.7-alpha, in order to keep output buffers from exceeding
20024 their limits. But there is no longer a maximum output buffer size,
20025 and flushing data in this way caused some undesirable recursions
20026 in our call graph. Closes ticket 16480.
20029 - Make "bridges+hs" the default test network. This tests almost all
20030 tor functionality during make test-network, while allowing tests
20031 to succeed on non-IPv6 systems. Requires chutney commit 396da92 in
20032 test-network-bridges-hs. Closes tickets 16945 (tor) and 16946
20033 (chutney). Patches by "teor".
20034 - Autodetect CHUTNEY_PATH if the chutney and Tor sources are side-
20035 by-side in the same parent directory. Closes ticket 16903. Patch
20037 - Use environment variables rather than autoconf substitutions to
20038 send variables from the build system to the test scripts. This
20039 change should be easier to maintain, and cause 'make distcheck' to
20040 work better than before. Fixes bug 17148.
20041 - Add a new set of callgraph analysis scripts that use clang to
20042 produce a list of which Tor functions are reachable from which
20043 other Tor functions. We're planning to use these to help simplify
20044 our code structure by identifying illogical dependencies.
20045 - Add new 'test-full' and 'test-full-online' targets to run all
20046 tests, including integration tests with stem and chutney.
20047 - Make the test-workqueue test work on Windows by initializing the
20048 network before we begin.
20049 - New make target (make test-network-all) to run multiple applicable
20050 chutney test cases. Patch from Teor; closes 16953.
20051 - Unit test dns_resolve(), dns_clip_ttl() and dns_get_expiry_ttl()
20052 functions in dns.c. Implements a portion of ticket 16831.
20053 - When building Tor with testing coverage enabled, run Chutney tests
20054 (if any) using the 'tor-cov' coverage binary.
20055 - When running test-network or test-stem, check for the absence of
20056 stem/chutney before doing any build operations.
20059 Changes in version 0.2.7.2-alpha - 2015-07-27
20060 This, the second alpha in the Tor 0.2.7 series, has a number of new
20061 features, including a way to manually pick the number of introduction
20062 points for hidden services, and the much stronger Ed25519 signing key
20063 algorithm for regular Tor relays (including support for encrypted
20064 offline identity keys in the new algorithm).
20066 Support for Ed25519 on relays is currently limited to signing router
20067 descriptors; later alphas in this series will extend Ed25519 key
20068 support to more parts of the Tor protocol.
20070 o Major features (Ed25519 identity keys, Proposal 220):
20071 - All relays now maintain a stronger identity key, using the Ed25519
20072 elliptic curve signature format. This master key is designed so
20073 that it can be kept offline. Relays also generate an online
20074 signing key, and a set of other Ed25519 keys and certificates.
20075 These are all automatically regenerated and rotated as needed.
20076 Implements part of ticket 12498.
20077 - Directory authorities now vote on Ed25519 identity keys along with
20078 RSA1024 keys. Implements part of ticket 12498.
20079 - Directory authorities track which Ed25519 identity keys have been
20080 used with which RSA1024 identity keys, and do not allow them to
20081 vary freely. Implements part of ticket 12498.
20082 - Microdescriptors now include Ed25519 identity keys. Implements
20083 part of ticket 12498.
20084 - Add support for offline encrypted Ed25519 master keys. To use this
20085 feature on your tor relay, run "tor --keygen" to make a new master
20086 key (or to make a new signing key if you already have a master
20087 key). Closes ticket 13642.
20089 o Major features (Hidden services):
20090 - Add the torrc option HiddenServiceNumIntroductionPoints, to
20091 specify a fixed number of introduction points. Its maximum value
20092 is 10 and default is 3. Using this option can increase a hidden
20093 service's reliability under load, at the cost of making it more
20094 visible that the hidden service is facing extra load. Closes
20096 - Remove the adaptive algorithm for choosing the number of
20097 introduction points, which used to change the number of
20098 introduction points (poorly) depending on the number of
20099 connections the HS sees. Closes ticket 4862.
20101 o Major features (onion key cross-certification):
20102 - Relay descriptors now include signatures of their own identity
20103 keys, made using the TAP and ntor onion keys. These signatures
20104 allow relays to prove ownership of their own onion keys. Because
20105 of this change, microdescriptors will no longer need to include
20106 RSA identity keys. Implements proposal 228; closes ticket 12499.
20108 o Major features (performance):
20109 - Improve the runtime speed of Ed25519 operations by using the
20110 public-domain Ed25519-donna by Andrew M. ("floodyberry").
20111 Implements ticket 16467.
20112 - Improve the runtime speed of the ntor handshake by using an
20113 optimized curve25519 basepoint scalarmult implementation from the
20114 public-domain Ed25519-donna by Andrew M. ("floodyberry"), based on
20115 ideas by Adam Langley. Implements ticket 9663.
20117 o Major bugfixes (client-side privacy, also in 0.2.6.9):
20118 - Properly separate out each SOCKSPort when applying stream
20119 isolation. The error occurred because each port's session group
20120 was being overwritten by a default value when the listener
20121 connection was initialized. Fixes bug 16247; bugfix on
20122 0.2.6.3-alpha. Patch by "jojelino".
20124 o Major bugfixes (hidden service clients, stability, also in 0.2.6.10):
20125 - Stop refusing to store updated hidden service descriptors on a
20126 client. This reverts commit 9407040c59218 (which indeed fixed bug
20127 14219, but introduced a major hidden service reachability
20128 regression detailed in bug 16381). This is a temporary fix since
20129 we can live with the minor issue in bug 14219 (it just results in
20130 some load on the network) but the regression of 16381 is too much
20131 of a setback. First-round fix for bug 16381; bugfix
20134 o Major bugfixes (hidden services):
20135 - When cannibalizing a circuit for an introduction point, always
20136 extend to the chosen exit node (creating a 4 hop circuit).
20137 Previously Tor would use the current circuit exit node, which
20138 changed the original choice of introduction point, and could cause
20139 the hidden service to skip excluded introduction points or
20140 reconnect to a skipped introduction point. Fixes bug 16260; bugfix
20143 o Major bugfixes (open file limit):
20144 - The open file limit wasn't checked before calling
20145 tor_accept_socket_nonblocking(), which would make Tor exceed the
20146 limit. Now, before opening a new socket, Tor validates the open
20147 file limit just before, and if the max has been reached, return an
20148 error. Fixes bug 16288; bugfix on 0.1.1.1-alpha.
20150 o Major bugfixes (stability, also in 0.2.6.10):
20151 - Stop crashing with an assertion failure when parsing certain kinds
20152 of malformed or truncated microdescriptors. Fixes bug 16400;
20153 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
20154 by "cypherpunks_backup".
20155 - Stop random client-side assertion failures that could occur when
20156 connecting to a busy hidden service, or connecting to a hidden
20157 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
20160 o Minor features (directory authorities, security, also in 0.2.6.9):
20161 - The HSDir flag given by authorities now requires the Stable flag.
20162 For the current network, this results in going from 2887 to 2806
20163 HSDirs. Also, it makes it harder for an attacker to launch a sybil
20164 attack by raising the effort for a relay to become Stable to
20165 require at the very least 7 days, while maintaining the 96 hours
20166 uptime requirement for HSDir. Implements ticket 8243.
20168 o Minor features (client):
20169 - Relax the validation of hostnames in SOCKS5 requests, allowing the
20170 character '_' to appear, in order to cope with domains observed in
20171 the wild that are serving non-RFC compliant records. Resolves
20173 - Relax the validation done to hostnames in SOCKS5 requests, and
20174 allow a single trailing '.' to cope with clients that pass FQDNs
20175 using that syntax to explicitly indicate that the domain name is
20176 fully-qualified. Fixes bug 16674; bugfix on 0.2.6.2-alpha.
20177 - Add GroupWritable and WorldWritable options to unix-socket based
20178 SocksPort and ControlPort options. These options apply to a single
20179 socket, and override {Control,Socks}SocketsGroupWritable. Closes
20182 o Minor features (control protocol):
20183 - Support network-liveness GETINFO key and NETWORK_LIVENESS event in
20184 the control protocol. Resolves ticket 15358.
20186 o Minor features (directory authorities):
20187 - Directory authorities no longer vote against the "Fast", "Stable",
20188 and "HSDir" flags just because they were going to vote against
20189 "Running": if the consensus turns out to be that the router was
20190 running, then the authority's vote should count. Patch from Peter
20191 Retzlaff; closes issue 8712.
20193 o Minor features (geoip, also in 0.2.6.10):
20194 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
20195 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
20197 o Minor features (hidden services):
20198 - Add the new options "HiddenServiceMaxStreams" and
20199 "HiddenServiceMaxStreamsCloseCircuit" to allow hidden services to
20200 limit the maximum number of simultaneous streams per circuit, and
20201 optionally tear down the circuit when the limit is exceeded. Part
20204 o Minor features (portability):
20205 - Use C99 variadic macros when the compiler is not GCC. This avoids
20206 failing compilations on MSVC, and fixes a log-file-based race
20207 condition in our old workarounds. Original patch from Gisle Vanem.
20209 o Minor bugfixes (compilation, also in 0.2.6.9):
20210 - Build with --enable-systemd correctly when libsystemd is
20211 installed, but systemd is not. Fixes bug 16164; bugfix on
20212 0.2.6.3-alpha. Patch from Peter Palfrader.
20214 o Minor bugfixes (controller):
20215 - Add the descriptor ID in each HS_DESC control event. It was
20216 missing, but specified in control-spec.txt. Fixes bug 15881;
20217 bugfix on 0.2.5.2-alpha.
20219 o Minor bugfixes (crypto error-handling, also in 0.2.6.10):
20220 - Check for failures from crypto_early_init, and refuse to continue.
20221 A previous typo meant that we could keep going with an
20222 uninitialized crypto library, and would have OpenSSL initialize
20223 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
20224 when implementing ticket 4900. Patch by "teor".
20226 o Minor bugfixes (hidden services):
20227 - Fix a crash when reloading configuration while at least one
20228 configured and one ephemeral hidden service exists. Fixes bug
20229 16060; bugfix on 0.2.7.1-alpha.
20230 - Avoid crashing with a double-free bug when we create an ephemeral
20231 hidden service but adding it fails for some reason. Fixes bug
20232 16228; bugfix on 0.2.7.1-alpha.
20234 o Minor bugfixes (Linux seccomp2 sandbox):
20235 - Use the sandbox in tor_open_cloexec whether or not O_CLOEXEC is
20236 defined. Patch by "teor". Fixes bug 16515; bugfix on 0.2.3.1-alpha.
20238 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.10):
20239 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
20240 these when eventfd2() support is missing. Fixes bug 16363; bugfix
20241 on 0.2.6.3-alpha. Patch from "teor".
20243 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.9):
20244 - Fix sandboxing to work when running as a relay, by allowing the
20245 renaming of secret_id_key, and allowing the eventfd2 and futex
20246 syscalls. Fixes bug 16244; bugfix on 0.2.6.1-alpha. Patch by
20248 - Allow systemd connections to work with the Linux seccomp2 sandbox
20249 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
20252 o Minor bugfixes (relay):
20253 - Fix a rarely-encountered memory leak when failing to initialize
20254 the thread pool. Fixes bug 16631; bugfix on 0.2.6.3-alpha. Patch
20255 from "cypherpunks".
20257 o Minor bugfixes (systemd):
20258 - Fix an accidental formatting error that broke the systemd
20259 configuration file. Fixes bug 16152; bugfix on 0.2.7.1-alpha.
20260 - Tor's systemd unit file no longer contains extraneous spaces.
20261 These spaces would sometimes confuse tools like deb-systemd-
20262 helper. Fixes bug 16162; bugfix on 0.2.5.5-alpha.
20264 o Minor bugfixes (tests):
20265 - Use the configured Python executable when running test-stem-full.
20266 Fixes bug 16470; bugfix on 0.2.7.1-alpha.
20268 o Minor bugfixes (tests, also in 0.2.6.9):
20269 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
20270 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
20272 o Minor bugfixes (threads, comments):
20273 - Always initialize return value in compute_desc_id in rendcommon.c
20274 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
20275 - Check for NULL values in getinfo_helper_onions(). Patch by "teor".
20276 Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
20277 - Remove undefined directive-in-macro in test_util_writepid clang
20278 3.7 complains that using a preprocessor directive inside a macro
20279 invocation in test_util_writepid in test_util.c is undefined.
20280 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
20282 o Code simplification and refactoring:
20283 - Define WINVER and _WIN32_WINNT centrally, in orconfig.h, in order
20284 to ensure they remain consistent and visible everywhere.
20285 - Remove some vestigial workarounds for the MSVC6 compiler. We
20286 haven't supported that in ages.
20287 - The link authentication code has been refactored for better
20288 testability and reliability. It now uses code generated with the
20289 "trunnel" binary encoding generator, to reduce the risk of bugs
20290 due to programmer error. Done as part of ticket 12498.
20293 - Include a specific and (hopefully) accurate documentation of the
20294 torrc file's meta-format in doc/torrc_format.txt. This is mainly
20295 of interest to people writing programs to parse or generate torrc
20296 files. This document is not a commitment to long-term
20297 compatibility; some aspects of the current format are a bit
20298 ridiculous. Closes ticket 2325.
20300 o Removed features:
20301 - Tor no longer supports copies of OpenSSL that are missing support
20302 for Elliptic Curve Cryptography. (We began using ECC when
20303 available in 0.2.4.8-alpha, for more safe and efficient key
20304 negotiation.) In particular, support for at least one of P256 or
20305 P224 is now required, with manual configuration needed if only
20306 P224 is available. Resolves ticket 16140.
20307 - Tor no longer supports versions of OpenSSL before 1.0. (If you are
20308 on an operating system that has not upgraded to OpenSSL 1.0 or
20309 later, and you compile Tor from source, you will need to install a
20310 more recent OpenSSL to link Tor against.) These versions of
20311 OpenSSL are still supported by the OpenSSL, but the numerous
20312 cryptographic improvements in later OpenSSL releases makes them a
20313 clear choice. Resolves ticket 16034.
20314 - Remove the HidServDirectoryV2 option. Now all relays offer to
20315 store hidden service descriptors. Related to 16543.
20316 - Remove the VoteOnHidServDirectoriesV2 option, since all
20317 authorities have long set it to 1. Closes ticket 16543.
20320 - Document use of coverity, clang static analyzer, and clang dynamic
20321 undefined behavior and address sanitizers in doc/HACKING. Include
20322 detailed usage instructions in the blacklist. Patch by "teor".
20323 Closes ticket 15817.
20324 - The link authentication protocol code now has extensive tests.
20325 - The relay descriptor signature testing code now has
20327 - The test_workqueue program now runs faster, and is enabled by
20328 default as a part of "make check".
20329 - Now that OpenSSL has its own scrypt implementation, add an unit
20330 test that checks for interoperability between libscrypt_scrypt()
20331 and OpenSSL's EVP_PBE_scrypt() so that we could not use libscrypt
20332 and rely on EVP_PBE_scrypt() whenever possible. Resolves
20336 Changes in version 0.2.6.10 - 2015-07-12
20337 Tor version 0.2.6.10 fixes some significant stability and hidden
20338 service client bugs, bulletproofs the cryptography init process, and
20339 fixes a bug when using the sandbox code with some older versions of
20340 Linux. Everyone running an older version, especially an older version
20341 of 0.2.6, should upgrade.
20343 o Major bugfixes (hidden service clients, stability):
20344 - Stop refusing to store updated hidden service descriptors on a
20345 client. This reverts commit 9407040c59218 (which indeed fixed bug
20346 14219, but introduced a major hidden service reachability
20347 regression detailed in bug 16381). This is a temporary fix since
20348 we can live with the minor issue in bug 14219 (it just results in
20349 some load on the network) but the regression of 16381 is too much
20350 of a setback. First-round fix for bug 16381; bugfix
20353 o Major bugfixes (stability):
20354 - Stop crashing with an assertion failure when parsing certain kinds
20355 of malformed or truncated microdescriptors. Fixes bug 16400;
20356 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
20357 by "cypherpunks_backup".
20358 - Stop random client-side assertion failures that could occur when
20359 connecting to a busy hidden service, or connecting to a hidden
20360 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
20363 o Minor features (geoip):
20364 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
20365 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
20367 o Minor bugfixes (crypto error-handling):
20368 - Check for failures from crypto_early_init, and refuse to continue.
20369 A previous typo meant that we could keep going with an
20370 uninitialized crypto library, and would have OpenSSL initialize
20371 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
20372 when implementing ticket 4900. Patch by "teor".
20374 o Minor bugfixes (Linux seccomp2 sandbox):
20375 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
20376 these when eventfd2() support is missing. Fixes bug 16363; bugfix
20377 on 0.2.6.3-alpha. Patch from "teor".
20380 Changes in version 0.2.6.9 - 2015-06-11
20381 Tor 0.2.6.9 fixes a regression in the circuit isolation code, increases the
20382 requirements for receiving an HSDir flag, and addresses some other small
20383 bugs in the systemd and sandbox code. Clients using circuit isolation
20384 should upgrade; all directory authorities should upgrade.
20386 o Major bugfixes (client-side privacy):
20387 - Properly separate out each SOCKSPort when applying stream
20388 isolation. The error occurred because each port's session group was
20389 being overwritten by a default value when the listener connection
20390 was initialized. Fixes bug 16247; bugfix on 0.2.6.3-alpha. Patch
20393 o Minor feature (directory authorities, security):
20394 - The HSDir flag given by authorities now requires the Stable flag.
20395 For the current network, this results in going from 2887 to 2806
20396 HSDirs. Also, it makes it harder for an attacker to launch a sybil
20397 attack by raising the effort for a relay to become Stable which
20398 takes at the very least 7 days to do so and by keeping the 96
20399 hours uptime requirement for HSDir. Implements ticket 8243.
20401 o Minor bugfixes (compilation):
20402 - Build with --enable-systemd correctly when libsystemd is
20403 installed, but systemd is not. Fixes bug 16164; bugfix on
20404 0.2.6.3-alpha. Patch from Peter Palfrader.
20406 o Minor bugfixes (Linux seccomp2 sandbox):
20407 - Fix sandboxing to work when running as a relaymby renaming of
20408 secret_id_key, and allowing the eventfd2 and futex syscalls. Fixes
20409 bug 16244; bugfix on 0.2.6.1-alpha. Patch by Peter Palfrader.
20410 - Allow systemd connections to work with the Linux seccomp2 sandbox
20411 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
20414 o Minor bugfixes (tests):
20415 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
20416 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
20419 Changes in version 0.2.6.8 - 2015-05-21
20420 Tor 0.2.6.8 fixes a bit of dodgy code in parsing INTRODUCE2 cells, and
20421 fixes an authority-side bug in assigning the HSDir flag. All directory
20422 authorities should upgrade.
20424 o Major bugfixes (hidden services, backport from 0.2.7.1-alpha):
20425 - Revert commit that made directory authorities assign the HSDir
20426 flag to relays without a DirPort; this was bad because such relays
20427 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
20430 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
20431 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
20432 a client authorized hidden service. Fixes bug 15823; bugfix
20435 o Minor features (geoip):
20436 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
20437 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
20441 Changes in version 0.2.7.1-alpha - 2015-05-12
20442 Tor 0.2.7.1-alpha is the first alpha release in its series. It
20443 includes numerous small features and bugfixes against previous Tor
20444 versions, and numerous small infrastructure improvements. The most
20445 notable features are several new ways for controllers to interact with
20446 the hidden services subsystem.
20448 o New system requirements:
20449 - Tor no longer includes workarounds to support Libevent versions
20450 before 1.3e. Libevent 2.0 or later is recommended. Closes
20453 o Major features (controller):
20454 - Add the ADD_ONION and DEL_ONION commands that allow the creation
20455 and management of hidden services via the controller. Closes
20457 - New "GETINFO onions/current" and "GETINFO onions/detached"
20458 commands to get information about hidden services created via the
20459 controller. Part of ticket 6411.
20460 - New HSFETCH command to launch a request for a hidden service
20461 descriptor. Closes ticket 14847.
20462 - New HSPOST command to upload a hidden service descriptor. Closes
20463 ticket 3523. Patch by "DonnchaC".
20465 o Major bugfixes (hidden services):
20466 - Revert commit that made directory authorities assign the HSDir
20467 flag to relays without a DirPort; this was bad because such relays
20468 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
20471 o Minor features (clock-jump tolerance):
20472 - Recover better when our clock jumps back many hours, like might
20473 happen for Tails or Whonix users who start with a very wrong
20474 hardware clock, use Tor to discover a more accurate time, and then
20475 fix their clock. Resolves part of ticket 8766.
20477 o Minor features (command-line interface):
20478 - Make --hash-password imply --hush to prevent unnecessary noise.
20479 Closes ticket 15542. Patch from "cypherpunks".
20480 - Print a warning whenever we find a relative file path being used
20481 as torrc option. Resolves issue 14018.
20483 o Minor features (controller):
20484 - Add DirAuthority lines for default directory authorities to the
20485 output of the "GETINFO config/defaults" command if not already
20486 present. Implements ticket 14840.
20487 - Controllers can now use "GETINFO hs/client/desc/id/..." to
20488 retrieve items from the client's hidden service descriptor cache.
20489 Closes ticket 14845.
20490 - Implement a new controller command "GETINFO status/fresh-relay-
20491 descs" to fetch a descriptor/extrainfo pair that was generated on
20492 demand just for the controller's use. Implements ticket 14784.
20494 o Minor features (DoS-resistance):
20495 - Make it harder for attackers to overload hidden services with
20496 introductions, by blocking multiple introduction requests on the
20497 same circuit. Resolves ticket 15515.
20499 o Minor features (geoip):
20500 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
20501 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
20504 o Minor features (HS popularity countermeasure):
20505 - To avoid leaking HS popularity, don't cycle the introduction point
20506 when we've handled a fixed number of INTRODUCE2 cells but instead
20507 cycle it when a random number of introductions is reached, thus
20508 making it more difficult for an attacker to find out the amount of
20509 clients that have used the introduction point for a specific HS.
20510 Closes ticket 15745.
20512 o Minor features (logging):
20513 - Include the Tor version in all LD_BUG log messages, since people
20514 tend to cut and paste those into the bugtracker. Implements
20517 o Minor features (pluggable transports):
20518 - When launching managed pluggable transports on Linux systems,
20519 attempt to have the kernel deliver a SIGTERM on tor exit if the
20520 pluggable transport process is still running. Resolves
20522 - When launching managed pluggable transports, setup a valid open
20523 stdin in the child process that can be used to detect if tor has
20524 terminated. The "TOR_PT_EXIT_ON_STDIN_CLOSE" environment variable
20525 can be used by implementations to detect this new behavior.
20526 Resolves ticket 15435.
20528 o Minor features (testing):
20529 - Add a test to verify that the compiler does not eliminate our
20530 memwipe() implementation. Closes ticket 15377.
20531 - Add make rule `check-changes` to verify the format of changes
20532 files. Closes ticket 15180.
20533 - Add unit tests for control_event_is_interesting(). Add a compile-
20534 time check that the number of events doesn't exceed the capacity
20535 of control_event_t.event_mask. Closes ticket 15431, checks for
20536 bugs similar to 13085. Patch by "teor".
20537 - Command-line argument tests moved to Stem. Resolves ticket 14806.
20538 - Integrate the ntor, backtrace, and zero-length keys tests into the
20539 automake test suite. Closes ticket 15344.
20540 - Remove assertions during builds to determine Tor's test coverage.
20541 We don't want to trigger these even in assertions, so including
20542 them artificially makes our branch coverage look worse than it is.
20543 This patch provides the new test-stem-full and coverage-html-full
20544 configure options. Implements ticket 15400.
20546 o Minor bugfixes (build):
20547 - Improve out-of-tree builds by making non-standard rules work and
20548 clean up additional files and directories. Fixes bug 15053; bugfix
20551 o Minor bugfixes (command-line interface):
20552 - When "--quiet" is provided along with "--validate-config", do not
20553 write anything to stdout on success. Fixes bug 14994; bugfix
20555 - When complaining about bad arguments to "--dump-config", use
20556 stderr, not stdout.
20558 o Minor bugfixes (configuration, unit tests):
20559 - Only add the default fallback directories when the DirAuthorities,
20560 AlternateDirAuthority, and FallbackDir directory config options
20561 are set to their defaults. The default fallback directory list is
20562 currently empty, this fix will only change tor's behavior when it
20563 has default fallback directories. Includes unit tests for
20564 consider_adding_dir_servers(). Fixes bug 15642; bugfix on
20565 90f6071d8dc0 in 0.2.4.7-alpha. Patch by "teor".
20567 o Minor bugfixes (correctness):
20568 - For correctness, avoid modifying a constant string in
20569 handle_control_postdescriptor. Fixes bug 15546; bugfix
20571 - Remove side-effects from tor_assert() calls. This was harmless,
20572 because we never disable assertions, but it is bad style and
20573 unnecessary. Fixes bug 15211; bugfix on 0.2.5.5, 0.2.2.36,
20576 o Minor bugfixes (hidden service):
20577 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
20578 a client authorized hidden service. Fixes bug 15823; bugfix
20580 - Remove an extraneous newline character from the end of hidden
20581 service descriptors. Fixes bug 15296; bugfix on 0.2.0.10-alpha.
20583 o Minor bugfixes (interface):
20584 - Print usage information for --dump-config when it is used without
20585 an argument. Also, fix the error message to use different wording
20586 and add newline at the end. Fixes bug 15541; bugfix
20589 o Minor bugfixes (logs):
20590 - When building Tor under Clang, do not include an extra set of
20591 parentheses in log messages that include function names. Fixes bug
20592 15269; bugfix on every released version of Tor when compiled with
20593 recent enough Clang.
20595 o Minor bugfixes (network):
20596 - When attempting to use fallback technique for network interface
20597 lookup, disregard loopback and multicast addresses since they are
20598 unsuitable for public communications.
20600 o Minor bugfixes (statistics):
20601 - Disregard the ConnDirectionStatistics torrc options when Tor is
20602 not a relay since in that mode of operation no sensible data is
20603 being collected and because Tor might run into measurement hiccups
20604 when running as a client for some time, then becoming a relay.
20605 Fixes bug 15604; bugfix on 0.2.2.35.
20607 o Minor bugfixes (test networks):
20608 - When self-testing reachability, use ExtendAllowPrivateAddresses to
20609 determine if local/private addresses imply reachability. The
20610 previous fix used TestingTorNetwork, which implies
20611 ExtendAllowPrivateAddresses, but this excluded rare configurations
20612 where ExtendAllowPrivateAddresses is set but TestingTorNetwork is
20613 not. Fixes bug 15771; bugfix on 0.2.6.1-alpha. Patch by "teor",
20614 issue discovered by CJ Ess.
20616 o Minor bugfixes (testing):
20617 - Check for matching value in server response in ntor_ref.py. Fixes
20618 bug 15591; bugfix on 0.2.4.8-alpha. Reported and fixed
20620 - Set the severity correctly when testing
20621 get_interface_addresses_ifaddrs() and
20622 get_interface_addresses_win32(), so that the tests fail gracefully
20623 instead of triggering an assertion. Fixes bug 15759; bugfix on
20624 0.2.6.3-alpha. Reported by Nicolas Derive.
20626 o Code simplification and refactoring:
20627 - Move the hacky fallback code out of get_interface_address6() into
20628 separate function and get it covered with unit-tests. Resolves
20630 - Refactor hidden service client-side cache lookup to intelligently
20631 report its various failure cases, and disentangle failure cases
20632 involving a lack of introduction points. Closes ticket 14391.
20633 - Use our own Base64 encoder instead of OpenSSL's, to allow more
20634 control over the output. Part of ticket 15652.
20637 - Improve the descriptions of statistics-related torrc options in
20638 the manpage to describe rationale and possible uses cases. Fixes
20640 - Improve the layout and formatting of ./configure --help messages.
20641 Closes ticket 15024. Patch from "cypherpunks".
20642 - Standardize on the term "server descriptor" in the manual page.
20643 Previously, we had used "router descriptor", "server descriptor",
20644 and "relay descriptor" interchangeably. Part of ticket 14987.
20647 - Remove `USE_OPENSSL_BASE64` and the corresponding fallback code
20648 and always use the internal Base64 decoder. The internal decoder
20649 has been part of tor since 0.2.0.10-alpha, and no one should
20650 be using the OpenSSL one. Part of ticket 15652.
20651 - Remove the 'tor_strclear()' function; use memwipe() instead.
20652 Closes ticket 14922.
20654 o Removed features:
20655 - Remove the (seldom-used) DynamicDHGroups feature. For anti-
20656 fingerprinting we now recommend pluggable transports; for forward-
20657 secrecy in TLS, we now use the P-256 group. Closes ticket 13736.
20658 - Remove the undocumented "--digests" command-line option. It
20659 complicated our build process, caused subtle build issues on
20660 multiple platforms, and is now redundant since we started
20661 including git version identifiers. Closes ticket 14742.
20662 - Tor no longer contains checks for ancient directory cache versions
20663 that didn't know about microdescriptors.
20664 - Tor no longer contains workarounds for stat files generated by
20665 super-old versions of Tor that didn't choose guards sensibly.
20668 Changes in version 0.2.4.27 - 2015-04-06
20669 Tor 0.2.4.27 backports two fixes from 0.2.6.7 for security issues that
20670 could be used by an attacker to crash hidden services, or crash clients
20671 visiting hidden services. Hidden services should upgrade as soon as
20672 possible; clients should upgrade whenever packages become available.
20674 This release also backports a simple improvement to make hidden
20675 services a bit less vulnerable to denial-of-service attacks.
20677 o Major bugfixes (security, hidden service):
20678 - Fix an issue that would allow a malicious client to trigger an
20679 assertion failure and halt a hidden service. Fixes bug 15600;
20680 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
20681 - Fix a bug that could cause a client to crash with an assertion
20682 failure when parsing a malformed hidden service descriptor. Fixes
20683 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
20685 o Minor features (DoS-resistance, hidden service):
20686 - Introduction points no longer allow multiple INTRODUCE1 cells to
20687 arrive on the same circuit. This should make it more expensive for
20688 attackers to overwhelm hidden services with introductions.
20689 Resolves ticket 15515.
20692 Changes in version 0.2.5.12 - 2015-04-06
20693 Tor 0.2.5.12 backports two fixes from 0.2.6.7 for security issues that
20694 could be used by an attacker to crash hidden services, or crash clients
20695 visiting hidden services. Hidden services should upgrade as soon as
20696 possible; clients should upgrade whenever packages become available.
20698 This release also backports a simple improvement to make hidden
20699 services a bit less vulnerable to denial-of-service attacks.
20701 o Major bugfixes (security, hidden service):
20702 - Fix an issue that would allow a malicious client to trigger an
20703 assertion failure and halt a hidden service. Fixes bug 15600;
20704 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
20705 - Fix a bug that could cause a client to crash with an assertion
20706 failure when parsing a malformed hidden service descriptor. Fixes
20707 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
20709 o Minor features (DoS-resistance, hidden service):
20710 - Introduction points no longer allow multiple INTRODUCE1 cells to
20711 arrive on the same circuit. This should make it more expensive for
20712 attackers to overwhelm hidden services with introductions.
20713 Resolves ticket 15515.
20716 Changes in version 0.2.6.7 - 2015-04-06
20717 Tor 0.2.6.7 fixes two security issues that could be used by an
20718 attacker to crash hidden services, or crash clients visiting hidden
20719 services. Hidden services should upgrade as soon as possible; clients
20720 should upgrade whenever packages become available.
20722 This release also contains two simple improvements to make hidden
20723 services a bit less vulnerable to denial-of-service attacks.
20725 o Major bugfixes (security, hidden service):
20726 - Fix an issue that would allow a malicious client to trigger an
20727 assertion failure and halt a hidden service. Fixes bug 15600;
20728 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
20729 - Fix a bug that could cause a client to crash with an assertion
20730 failure when parsing a malformed hidden service descriptor. Fixes
20731 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
20733 o Minor features (DoS-resistance, hidden service):
20734 - Introduction points no longer allow multiple INTRODUCE1 cells to
20735 arrive on the same circuit. This should make it more expensive for
20736 attackers to overwhelm hidden services with introductions.
20737 Resolves ticket 15515.
20738 - Decrease the amount of reattempts that a hidden service performs
20739 when its rendezvous circuits fail. This reduces the computational
20740 cost for running a hidden service under heavy load. Resolves
20744 Changes in version 0.2.6.6 - 2015-03-24
20745 Tor 0.2.6.6 is the first stable release in the 0.2.6 series.
20747 It adds numerous safety, security, correctness, and performance
20748 improvements. Client programs can be configured to use more kinds of
20749 sockets, AutomapHosts works better, the multithreading backend is
20750 improved, cell transmission is refactored, test coverage is much
20751 higher, more denial-of-service attacks are handled, guard selection is
20752 improved to handle long-term guards better, pluggable transports
20753 should work a bit better, and some annoying hidden service performance
20754 bugs should be addressed.
20756 o Minor bugfixes (portability):
20757 - Use the correct datatype in the SipHash-2-4 function to prevent
20758 compilers from assuming any sort of alignment. Fixes bug 15436;
20759 bugfix on 0.2.5.3-alpha.
20761 Changes in version 0.2.6.5-rc - 2015-03-18
20762 Tor 0.2.6.5-rc is the second and (hopefully) last release candidate in
20763 the 0.2.6. It fixes a small number of bugs found in 0.2.6.4-rc.
20765 o Major bugfixes (client):
20766 - Avoid crashing when making certain configuration option changes on
20767 clients. Fixes bug 15245; bugfix on 0.2.6.3-alpha. Reported
20770 o Major bugfixes (pluggable transports):
20771 - Initialize the extended OR Port authentication cookie before
20772 launching pluggable transports. This prevents a race condition
20773 that occurred when server-side pluggable transports would cache the
20774 authentication cookie before it has been (re)generated. Fixes bug
20775 15240; bugfix on 0.2.5.1-alpha.
20777 o Major bugfixes (portability):
20778 - Do not crash on startup when running on Solaris. Fixes a bug
20779 related to our fix for 9495; bugfix on 0.2.6.1-alpha. Reported
20782 o Minor features (heartbeat):
20783 - On relays, report how many connections we negotiated using each
20784 version of the Tor link protocols. This information will let us
20785 know if removing support for very old versions of the Tor
20786 protocols is harming the network. Closes ticket 15212.
20788 o Code simplification and refactoring:
20789 - Refactor main loop to extract the 'loop' part. This makes it
20790 easier to run Tor under Shadow. Closes ticket 15176.
20793 Changes in version 0.2.5.11 - 2015-03-17
20794 Tor 0.2.5.11 is the second stable release in the 0.2.5 series.
20796 It backports several bugfixes from the 0.2.6 branch, including a
20797 couple of medium-level security fixes for relays and exit nodes.
20798 It also updates the list of directory authorities.
20800 o Directory authority changes:
20801 - Remove turtles as a directory authority.
20802 - Add longclaw as a new (v3) directory authority. This implements
20803 ticket 13296. This keeps the directory authority count at 9.
20804 - The directory authority Faravahar has a new IP address. This
20805 closes ticket 14487.
20807 o Major bugfixes (crash, OSX, security):
20808 - Fix a remote denial-of-service opportunity caused by a bug in
20809 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
20812 o Major bugfixes (relay, stability, possible security):
20813 - Fix a bug that could lead to a relay crashing with an assertion
20814 failure if a buffer of exactly the wrong layout was passed to
20815 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
20816 0.2.0.10-alpha. Patch from 'cypherpunks'.
20817 - Do not assert if the 'data' pointer on a buffer is advanced to the
20818 very end of the buffer; log a BUG message instead. Only assert if
20819 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
20821 o Major bugfixes (exit node stability):
20822 - Fix an assertion failure that could occur under high DNS load.
20823 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
20824 diagnosed and fixed by "cypherpunks".
20826 o Major bugfixes (Linux seccomp2 sandbox):
20827 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
20828 crash during attempts to call wait4. Fixes bug 15088; bugfix on
20829 0.2.5.1-alpha. Patch from "sanic".
20831 o Minor features (controller):
20832 - New "GETINFO bw-event-cache" to get information about recent
20833 bandwidth events. Closes ticket 14128. Useful for controllers to
20834 get recent bandwidth history after the fix for ticket 13988.
20836 o Minor features (geoip):
20837 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
20838 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
20841 o Minor bugfixes (client, automapping):
20842 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
20843 no value follows the option. Fixes bug 14142; bugfix on
20844 0.2.4.7-alpha. Patch by "teor".
20845 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
20846 14195; bugfix on 0.1.0.1-rc.
20848 o Minor bugfixes (compilation):
20849 - Build without warnings with the stock OpenSSL srtp.h header, which
20850 has a duplicate declaration of SSL_get_selected_srtp_profile().
20851 Fixes bug 14220; this is OpenSSL's bug, not ours.
20853 o Minor bugfixes (directory authority):
20854 - Allow directory authorities to fetch more data from one another if
20855 they find themselves missing lots of votes. Previously, they had
20856 been bumping against the 10 MB queued data limit. Fixes bug 14261;
20857 bugfix on 0.1.2.5-alpha.
20858 - Enlarge the buffer to read bwauth generated files to avoid an
20859 issue when parsing the file in dirserv_read_measured_bandwidths().
20860 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
20862 o Minor bugfixes (statistics):
20863 - Increase period over which bandwidth observations are aggregated
20864 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
20866 o Minor bugfixes (preventative security, C safety):
20867 - When reading a hexadecimal, base-32, or base-64 encoded value from
20868 a string, always overwrite the whole output buffer. This prevents
20869 some bugs where we would look at (but fortunately, not reveal)
20870 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
20874 Changes in version 0.2.4.26 - 2015-03-17
20875 Tor 0.2.4.26 includes an updated list of directory authorities. It
20876 also backports a couple of stability and security bugfixes from 0.2.5
20879 o Directory authority changes:
20880 - Remove turtles as a directory authority.
20881 - Add longclaw as a new (v3) directory authority. This implements
20882 ticket 13296. This keeps the directory authority count at 9.
20883 - The directory authority Faravahar has a new IP address. This
20884 closes ticket 14487.
20886 o Major bugfixes (exit node stability, also in 0.2.6.3-alpha):
20887 - Fix an assertion failure that could occur under high DNS load.
20888 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
20889 diagnosed and fixed by "cypherpunks".
20891 o Major bugfixes (relay, stability, possible security, also in 0.2.6.4-rc):
20892 - Fix a bug that could lead to a relay crashing with an assertion
20893 failure if a buffer of exactly the wrong layout was passed to
20894 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
20895 0.2.0.10-alpha. Patch from 'cypherpunks'.
20896 - Do not assert if the 'data' pointer on a buffer is advanced to the
20897 very end of the buffer; log a BUG message instead. Only assert if
20898 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
20900 o Minor features (geoip):
20901 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
20902 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
20905 Changes in version 0.2.6.4-rc - 2015-03-09
20906 Tor 0.2.6.4-alpha fixes an issue in the directory code that an
20907 attacker might be able to use in order to crash certain Tor
20908 directories. It also resolves some minor issues left over from, or
20909 introduced in, Tor 0.2.6.3-alpha or earlier.
20911 o Major bugfixes (crash, OSX, security):
20912 - Fix a remote denial-of-service opportunity caused by a bug in
20913 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
20916 o Major bugfixes (relay, stability, possible security):
20917 - Fix a bug that could lead to a relay crashing with an assertion
20918 failure if a buffer of exactly the wrong layout is passed to
20919 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
20920 0.2.0.10-alpha. Patch from "cypherpunks".
20921 - Do not assert if the 'data' pointer on a buffer is advanced to the
20922 very end of the buffer; log a BUG message instead. Only assert if
20923 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
20925 o Major bugfixes (FreeBSD IPFW transparent proxy):
20926 - Fix address detection with FreeBSD transparent proxies, when
20927 "TransProxyType ipfw" is in use. Fixes bug 15064; bugfix
20930 o Major bugfixes (Linux seccomp2 sandbox):
20931 - Pass IPPROTO_TCP rather than 0 to socket(), so that the Linux
20932 seccomp2 sandbox doesn't fail. Fixes bug 14989; bugfix
20934 - Allow AF_UNIX hidden services to be used with the seccomp2
20935 sandbox. Fixes bug 15003; bugfix on 0.2.6.3-alpha.
20936 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
20937 crash during attempts to call wait4. Fixes bug 15088; bugfix on
20938 0.2.5.1-alpha. Patch from "sanic".
20940 o Minor features (controller):
20941 - Messages about problems in the bootstrap process now include
20942 information about the server we were trying to connect to when we
20943 noticed the problem. Closes ticket 15006.
20945 o Minor features (geoip):
20946 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
20947 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
20950 o Minor features (logs):
20951 - Quiet some log messages in the heartbeat and at startup. Closes
20954 o Minor bugfixes (certificate handling):
20955 - If an authority operator accidentally makes a signing certificate
20956 with a future publication time, do not discard its real signing
20957 certificates. Fixes bug 11457; bugfix on 0.2.0.3-alpha.
20958 - Remove any old authority certificates that have been superseded
20959 for at least two days. Previously, we would keep superseded
20960 certificates until they expired, if they were published close in
20961 time to the certificate that superseded them. Fixes bug 11454;
20962 bugfix on 0.2.1.8-alpha.
20964 o Minor bugfixes (compilation):
20965 - Fix a compilation warning on s390. Fixes bug 14988; bugfix
20967 - Fix a compilation warning on FreeBSD. Fixes bug 15151; bugfix
20970 o Minor bugfixes (testing):
20971 - Fix endianness issues in unit test for resolve_my_address() to
20972 have it pass on big endian systems. Fixes bug 14980; bugfix on
20974 - Avoid a side-effect in a tor_assert() in the unit tests. Fixes bug
20975 15188; bugfix on 0.1.2.3-alpha. Patch from Tom van der Woerdt.
20976 - When running the new 'make test-stem' target, use the configured
20977 python binary. Fixes bug 15037; bugfix on 0.2.6.3-alpha. Patch
20978 from "cypherpunks".
20979 - When running the zero-length-keys tests, do not use the default
20980 torrc file. Fixes bug 15033; bugfix on 0.2.6.3-alpha. Reported
20983 o Directory authority IP change:
20984 - The directory authority Faravahar has a new IP address. This
20985 closes ticket 14487.
20988 - Remove some lingering dead code that once supported mempools.
20989 Mempools were disabled by default in 0.2.5, and removed entirely
20990 in 0.2.6.3-alpha. Closes more of ticket 14848; patch
20994 Changes in version 0.2.6.3-alpha - 2015-02-19
20995 Tor 0.2.6.3-alpha is the third (and hopefully final) alpha release in
20996 the 0.2.6.x series. It introduces support for more kinds of sockets,
20997 makes it harder to accidentally run an exit, improves our
20998 multithreading backend, incorporates several fixes for the
20999 AutomapHostsOnResolve option, and fixes numerous other bugs besides.
21001 If no major regressions or security holes are found in this version,
21002 the next version will be a release candidate.
21004 o Deprecated versions:
21005 - Tor relays older than 0.2.4.18-rc are no longer allowed to
21006 advertise themselves on the network. Closes ticket 13555.
21008 o Major features (security, unix domain sockets):
21009 - Allow SocksPort to be an AF_UNIX Unix Domain Socket. Now high risk
21010 applications can reach Tor without having to create AF_INET or
21011 AF_INET6 sockets, meaning they can completely disable their
21012 ability to make non-Tor network connections. To create a socket of
21013 this type, use "SocksPort unix:/path/to/socket". Implements
21015 - Support mapping hidden service virtual ports to AF_UNIX sockets.
21016 The syntax is "HiddenServicePort 80 unix:/path/to/socket".
21017 Implements ticket 11485.
21019 o Major features (changed defaults):
21020 - Prevent relay operators from unintentionally running exits: When a
21021 relay is configured as an exit node, we now warn the user unless
21022 the "ExitRelay" option is set to 1. We warn even more loudly if
21023 the relay is configured with the default exit policy, since this
21024 can indicate accidental misconfiguration. Setting "ExitRelay 0"
21025 stops Tor from running as an exit relay. Closes ticket 10067.
21027 o Major features (directory system):
21028 - When downloading server- or microdescriptors from a directory
21029 server, we no longer launch multiple simultaneous requests to the
21030 same server. This reduces load on the directory servers,
21031 especially when directory guards are in use. Closes ticket 9969.
21032 - When downloading server- or microdescriptors over a tunneled
21033 connection, do not limit the length of our requests to what the
21034 Squid proxy is willing to handle. Part of ticket 9969.
21035 - Authorities can now vote on the correct digests and latest
21036 versions for different software packages. This allows packages
21037 that include Tor to use the Tor authority system as a way to get
21038 notified of updates and their correct digests. Implements proposal
21039 227. Closes ticket 10395.
21041 o Major features (guards):
21042 - Introduce the Guardfraction feature to improves load balancing on
21043 guard nodes. Specifically, it aims to reduce the traffic gap that
21044 guard nodes experience when they first get the Guard flag. This is
21045 a required step if we want to increase the guard lifetime to 9
21046 months or greater. Closes ticket 9321.
21048 o Major features (performance):
21049 - Make the CPU worker implementation more efficient by avoiding the
21050 kernel and lengthening pipelines. The original implementation used
21051 sockets to transfer data from the main thread to the workers, and
21052 didn't allow any thread to be assigned more than a single piece of
21053 work at once. The new implementation avoids communications
21054 overhead by making requests in shared memory, avoiding kernel IO
21055 where possible, and keeping more requests in flight at once.
21056 Implements ticket 9682.
21058 o Major features (relay):
21059 - Raise the minimum acceptable configured bandwidth rate for bridges
21060 to 50 KiB/sec and for relays to 75 KiB/sec. (The old values were
21061 20 KiB/sec.) Closes ticket 13822.
21063 o Major bugfixes (exit node stability):
21064 - Fix an assertion failure that could occur under high DNS load.
21065 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
21066 diagnosed and fixed by "cypherpunks".
21068 o Major bugfixes (mixed relay-client operation):
21069 - When running as a relay and client at the same time (not
21070 recommended), if we decide not to use a new guard because we want
21071 to retry older guards, only close the locally-originating circuits
21072 passing through that guard. Previously we would close all the
21073 circuits through that guard. Fixes bug 9819; bugfix on
21074 0.2.1.1-alpha. Reported by "skruffy".
21076 o Minor features (build):
21077 - New --disable-system-torrc compile-time option to prevent Tor from
21078 looking for the system-wide torrc or torrc-defaults files.
21079 Resolves ticket 13037.
21081 o Minor features (controller):
21082 - Include SOCKS_USERNAME and SOCKS_PASSWORD values in controller
21083 events so controllers can observe circuit isolation inputs. Closes
21085 - ControlPort now supports the unix:/path/to/socket syntax as an
21086 alternative to the ControlSocket option, for consistency with
21087 SocksPort and HiddenServicePort. Closes ticket 14451.
21088 - New "GETINFO bw-event-cache" to get information about recent
21089 bandwidth events. Closes ticket 14128. Useful for controllers to
21090 get recent bandwidth history after the fix for ticket 13988.
21092 o Minor features (Denial of service resistance):
21093 - Count the total number of bytes used storing hidden service
21094 descriptors against the value of MaxMemInQueues. If we're low on
21095 memory, and more than 20% of our memory is used holding hidden
21096 service descriptors, free them until no more than 10% of our
21097 memory holds hidden service descriptors. Free the least recently
21098 fetched descriptors first. Resolves ticket 13806.
21099 - When we have recently been under memory pressure (over 3/4 of
21100 MaxMemInQueues is allocated), then allocate smaller zlib objects
21101 for small requests. Closes ticket 11791.
21103 o Minor features (geoip):
21104 - Update geoip and geoip6 files to the January 7 2015 Maxmind
21105 GeoLite2 Country database.
21107 o Minor features (guard nodes):
21108 - Reduce the time delay before saving guard status to disk from 10
21109 minutes to 30 seconds (or from one hour to 10 minutes if
21110 AvoidDiskWrites is set). Closes ticket 12485.
21112 o Minor features (hidden service):
21113 - Make Sybil attacks against hidden services harder by changing the
21114 minimum time required to get the HSDir flag from 25 hours up to 96
21115 hours. Addresses ticket 14149.
21116 - New option "HiddenServiceAllowUnknownPorts" to allow hidden
21117 services to disable the anti-scanning feature introduced in
21118 0.2.6.2-alpha. With this option not set, a connection to an
21119 unlisted port closes the circuit. With this option set, only a
21120 RELAY_DONE cell is sent. Closes ticket 14084.
21122 o Minor features (interface):
21123 - Implement "-f -" command-line option to read torrc configuration
21124 from standard input, if you don't want to store the torrc file in
21125 the file system. Implements feature 13865.
21127 o Minor features (logging):
21128 - Add a count of unique clients to the bridge heartbeat message.
21129 Resolves ticket 6852.
21130 - Suppress "router info incompatible with extra info" message when
21131 reading extrainfo documents from cache. (This message got loud
21132 around when we closed bug 9812 in 0.2.6.2-alpha.) Closes
21134 - Elevate hidden service authorized-client message from DEBUG to
21135 INFO. Closes ticket 14015.
21137 o Minor features (stability):
21138 - Add assertions in our hash-table iteration code to check for
21139 corrupted values that could cause infinite loops. Closes
21142 o Minor features (systemd):
21143 - Various improvements and modernizations in systemd hardening
21144 support. Closes ticket 13805. Patch from Craig Andrews.
21146 o Minor features (testing networks):
21147 - Drop the minimum RendPostPeriod on a testing network to 5 seconds,
21148 and the default on a testing network to 2 minutes. Drop the
21149 MIN_REND_INITIAL_POST_DELAY on a testing network to 5 seconds, but
21150 keep the default on a testing network at 30 seconds. This reduces
21151 HS bootstrap time to around 25 seconds. Also, change the default
21152 time in test-network.sh to match. Closes ticket 13401. Patch
21154 - Create TestingDirAuthVoteHSDir to correspond to
21155 TestingDirAuthVoteExit/Guard. Ensures that authorities vote the
21156 HSDir flag for the listed relays regardless of uptime or ORPort
21157 connectivity. Respects the value of VoteOnHidServDirectoriesV2.
21158 Partial implementation for ticket 14067. Patch by "teor".
21160 o Minor features (tor2web mode):
21161 - Introduce the config option Tor2webRendezvousPoints, which allows
21162 clients in Tor2webMode to select a specific Rendezvous Point to be
21163 used in HS circuits. This might allow better performance for
21164 Tor2Web nodes. Implements ticket 12844.
21166 o Minor bugfixes (client DNS):
21167 - Report the correct cached DNS expiration times on SOCKS port or in
21168 DNS replies. Previously, we would report everything as "never
21169 expires." Fixes bug 14193; bugfix on 0.2.3.17-beta.
21170 - Avoid a small memory leak when we find a cached answer for a
21171 reverse DNS lookup in a client-side DNS cache. (Remember, client-
21172 side DNS caching is off by default, and is not recommended.) Fixes
21173 bug 14259; bugfix on 0.2.0.1-alpha.
21175 o Minor bugfixes (client, automapping):
21176 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
21177 no value follows the option. Fixes bug 14142; bugfix on
21178 0.2.4.7-alpha. Patch by "teor".
21179 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
21180 14195; bugfix on 0.1.0.1-rc.
21181 - Prevent changes to other options from removing the wildcard value
21182 "." from "AutomapHostsSuffixes". Fixes bug 12509; bugfix
21184 - Allow MapAddress and AutomapHostsOnResolve to work together when
21185 an address is mapped into another address type (like .onion) that
21186 must be automapped at resolve time. Fixes bug 7555; bugfix
21189 o Minor bugfixes (client, bridges):
21190 - When we are using bridges and we had a network connectivity
21191 problem, only retry connecting to our currently configured
21192 bridges, not all bridges we know about and remember using. Fixes
21193 bug 14216; bugfix on 0.2.2.17-alpha.
21195 o Minor bugfixes (client, IPv6):
21196 - Reject socks requests to literal IPv6 addresses when IPv6Traffic
21197 flag is not set; and not because the NoIPv4Traffic flag was set.
21198 Previously we'd looked at the NoIPv4Traffic flag for both types of
21199 literal addresses. Fixes bug 14280; bugfix on 0.2.4.7-alpha.
21201 o Minor bugfixes (compilation):
21202 - The address of an array in the middle of a structure will always
21203 be non-NULL. clang recognises this and complains. Disable the
21204 tautologous and redundant check to silence this warning. Fixes bug
21205 14001; bugfix on 0.2.1.2-alpha.
21206 - Avoid warnings when building with systemd 209 or later. Fixes bug
21207 14072; bugfix on 0.2.6.2-alpha. Patch from "h.venev".
21208 - Compile correctly with (unreleased) OpenSSL 1.1.0 headers.
21209 Addresses ticket 14188.
21210 - Build without warnings with the stock OpenSSL srtp.h header, which
21211 has a duplicate declaration of SSL_get_selected_srtp_profile().
21212 Fixes bug 14220; this is OpenSSL's bug, not ours.
21213 - Do not compile any code related to Tor2Web mode when Tor2Web mode
21214 is not enabled at compile time. Previously, this code was included
21215 in a disabled state. See discussion on ticket 12844.
21216 - Remove the --disable-threads configure option again. It was
21217 accidentally partially reintroduced in 29ac883606d6d. Fixes bug
21218 14819; bugfix on 0.2.6.2-alpha.
21220 o Minor bugfixes (controller):
21221 - Report "down" in response to the "GETINFO entry-guards" command
21222 when relays are down with an unreachable_since value. Previously,
21223 we would report "up". Fixes bug 14184; bugfix on 0.1.2.2-alpha.
21224 - Avoid crashing on a malformed EXTENDCIRCUIT command. Fixes bug
21225 14116; bugfix on 0.2.2.9-alpha.
21226 - Add a code for the END_CIRC_REASON_IP_NOW_REDUNDANT circuit close
21227 reason. Fixes bug 14207; bugfix on 0.2.6.2-alpha.
21229 o Minor bugfixes (directory authority):
21230 - Allow directory authorities to fetch more data from one another if
21231 they find themselves missing lots of votes. Previously, they had
21232 been bumping against the 10 MB queued data limit. Fixes bug 14261;
21233 bugfix on 0.1.2.5-alpha.
21234 - Do not attempt to download extrainfo documents which we will be
21235 unable to validate with a matching server descriptor. Fixes bug
21236 13762; bugfix on 0.2.0.1-alpha.
21237 - Fix a bug that was truncating AUTHDIR_NEWDESC events sent to the
21238 control port. Fixes bug 14953; bugfix on 0.2.0.1-alpha.
21239 - Enlarge the buffer to read bwauth generated files to avoid an
21240 issue when parsing the file in dirserv_read_measured_bandwidths().
21241 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
21243 o Minor bugfixes (file handling):
21244 - Stop failing when key files are zero-length. Instead, generate new
21245 keys, and overwrite the empty key files. Fixes bug 13111; bugfix
21246 on all versions of Tor. Patch by "teor".
21247 - Stop generating a fresh .old RSA onion key file when the .old file
21248 is missing. Fixes part of 13111; bugfix on 0.0.6rc1.
21249 - Avoid overwriting .old key files with empty key files.
21250 - Skip loading zero-length extrainfo store, router store, stats,
21251 state, and key files.
21252 - Avoid crashing when trying to reload a torrc specified as a
21253 relative path with RunAsDaemon turned on. Fixes bug 13397; bugfix
21256 o Minor bugfixes (hidden services):
21257 - Close the introduction circuit when we have no more usable intro
21258 points, instead of waiting for it to time out. This also ensures
21259 that no follow-up HS descriptor fetch is triggered when the
21260 circuit eventually times out. Fixes bug 14224; bugfix on 0.0.6.
21261 - When fetching a hidden service descriptor for a down service that
21262 was recently up, do not keep refetching until we try the same
21263 replica twice in a row. Fixes bug 14219; bugfix on 0.2.0.10-alpha.
21264 - Successfully launch Tor with a nonexistent hidden service
21265 directory. Our fix for bug 13942 didn't catch this case. Fixes bug
21266 14106; bugfix on 0.2.6.2-alpha.
21268 o Minor bugfixes (logging):
21269 - Avoid crashing when there are more log domains than entries in
21270 domain_list. Bugfix on 0.2.3.1-alpha.
21271 - Add a string representation for LD_SCHED. Fixes bug 14740; bugfix
21273 - Don't log messages to stdout twice when starting up. Fixes bug
21274 13993; bugfix on 0.2.6.1-alpha.
21276 o Minor bugfixes (parsing):
21277 - Stop accepting milliseconds (or other junk) at the end of
21278 descriptor publication times. Fixes bug 9286; bugfix on 0.0.2pre25.
21279 - Support two-number and three-number version numbers correctly, in
21280 case we change the Tor versioning system in the future. Fixes bug
21281 13661; bugfix on 0.0.8pre1.
21283 o Minor bugfixes (path counting):
21284 - When deciding whether the consensus lists any exit nodes, count
21285 the number listed in the consensus, not the number we have
21286 descriptors for. Fixes part of bug 14918; bugfix on 0.2.6.2-alpha.
21287 - When deciding whether we have any exit nodes, only examine
21288 ExitNodes when the ExitNodes option is actually set. Fixes part of
21289 bug 14918; bugfix on 0.2.6.2-alpha.
21290 - Get rid of redundant and possibly scary warnings that we are
21291 missing directory information while we bootstrap. Fixes part of
21292 bug 14918; bugfix on 0.2.6.2-alpha.
21294 o Minor bugfixes (portability):
21295 - Fix the ioctl()-based network interface lookup code so that it
21296 will work on systems that have variable-length struct ifreq, for
21298 - Fix scheduler compilation on targets where char is unsigned. Fixes
21299 bug 14764; bugfix on 0.2.6.2-alpha. Reported by Christian Kujau.
21301 o Minor bugfixes (sandbox):
21302 - Allow glibc fatal errors to be sent to stderr before Tor exits.
21303 Previously, glibc would try to write them to /dev/tty, and the
21304 sandbox would trap the call and make Tor exit prematurely. Fixes
21305 bug 14759; bugfix on 0.2.5.1-alpha.
21307 o Minor bugfixes (shutdown):
21308 - When shutting down, always call event_del() on lingering read or
21309 write events before freeing them. Otherwise, we risk double-frees
21310 or read-after-frees in event_base_free(). Fixes bug 12985; bugfix
21313 o Minor bugfixes (small memory leaks):
21314 - Avoid leaking memory when using IPv6 virtual address mappings.
21315 Fixes bug 14123; bugfix on 0.2.4.7-alpha. Patch by Tom van
21318 o Minor bugfixes (statistics):
21319 - Increase period over which bandwidth observations are aggregated
21320 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
21322 o Minor bugfixes (systemd support):
21323 - Fix detection and operation of systemd watchdog. Fixes part of bug
21324 14141; bugfix on 0.2.6.2-alpha. Patch from Tomasz Torcz.
21325 - Run correctly under systemd with the RunAsDaemon option set. Fixes
21326 part of bug 14141; bugfix on 0.2.5.7-rc. Patch from Tomasz Torcz.
21327 - Inform the systemd supervisor about more changes in the Tor
21328 process status. Implements part of ticket 14141. Patch from
21330 - Cause the "--disable-systemd" option to actually disable systemd
21331 support. Fixes bug 14350; bugfix on 0.2.6.2-alpha. Patch
21334 o Minor bugfixes (TLS):
21335 - Check more thoroughly throughout the TLS code for possible
21336 unlogged TLS errors. Possible diagnostic or fix for bug 13319.
21338 o Minor bugfixes (transparent proxy):
21339 - Use getsockname, not getsockopt, to retrieve the address for a
21340 TPROXY-redirected connection. Fixes bug 13796; bugfix
21343 o Code simplification and refactoring:
21344 - Move fields related to isolating and configuring client ports into
21345 a shared structure. Previously, they were duplicated across
21346 port_cfg_t, listener_connection_t, and edge_connection_t. Failure
21347 to copy them correctly had been the cause of at least one bug in
21348 the past. Closes ticket 8546.
21349 - Refactor the get_interface_addresses_raw() doom-function into
21350 multiple smaller and simpler subfunctions. Cover the resulting
21351 subfunctions with unit-tests. Fixes a significant portion of
21353 - Remove workaround in dirserv_thinks_router_is_hs_dir() that was
21354 only for version <= 0.2.2.24 which is now deprecated. Closes
21356 - Remove a test for a long-defunct broken version-one
21360 - Adding section on OpenBSD to our TUNING document. Thanks to mmcc
21361 for writing the OpenBSD-specific tips. Resolves ticket 13702.
21362 - Make the tor-resolve documentation match its help string and its
21363 options. Resolves part of ticket 14325.
21364 - Log a more useful error message from tor-resolve when failing to
21365 look up a hidden service address. Resolves part of ticket 14325.
21367 o Downgraded warnings:
21368 - Don't warn when we've attempted to contact a relay using the wrong
21369 ntor onion key. Closes ticket 9635.
21371 o Removed features:
21372 - To avoid confusion with the "ExitRelay" option, "ExitNode" is no
21373 longer silently accepted as an alias for "ExitNodes".
21374 - The --enable-mempool and --enable-buf-freelists options, which
21375 were originally created to work around bad malloc implementations,
21376 no longer exist. They were off-by-default in 0.2.5. Closes
21380 - Make the checkdir/perms test complete successfully even if the
21381 global umask is not 022. Fixes bug 14215; bugfix on 0.2.6.2-alpha.
21382 - Test that tor does not fail when key files are zero-length. Check
21383 that tor generates new keys, and overwrites the empty key files.
21384 - Test that tor generates new keys when keys are missing
21385 (existing behavior).
21386 - Test that tor does not overwrite key files that already contain
21387 data (existing behavior). Tests bug 13111. Patch by "teor".
21388 - New "make test-stem" target to run stem integration tests.
21389 Requires that the "STEM_SOURCE_DIR" environment variable be set.
21390 Closes ticket 14107.
21391 - Make the test_cmdline_args.py script work correctly on Windows.
21392 Patch from Gisle Vanem.
21393 - Move the slower unit tests into a new "./src/test/test-slow"
21394 binary that can be run independently of the other tests. Closes
21396 - Avoid undefined behavior when sampling huge values from the
21397 Laplace distribution. This made unittests fail on Raspberry Pi.
21398 Bug found by Device. Fixes bug 14090; bugfix on 0.2.6.2-alpha.
21401 Changes in version 0.2.6.2-alpha - 2014-12-31
21402 Tor 0.2.6.2-alpha is the second alpha release in the 0.2.6.x series.
21403 It introduces a major new backend for deciding when to send cells on
21404 channels, which should lead down the road to big performance
21405 increases. It contains security and statistics features for better
21406 work on hidden services, and numerous bugfixes.
21408 This release contains many new unit tests, along with major
21409 performance improvements for running testing networks using Chutney.
21410 Thanks to a series of patches contributed by "teor", testing networks
21411 should now bootstrap in seconds, rather than minutes.
21413 o Major features (relay, infrastructure):
21414 - Complete revision of the code that relays use to decide which cell
21415 to send next. Formerly, we selected the best circuit to write on
21416 each channel, but we didn't select among channels in any
21417 sophisticated way. Now, we choose the best circuits globally from
21418 among those whose channels are ready to deliver traffic.
21420 This patch implements a new inter-cmux comparison API, a global
21421 high/low watermark mechanism and a global scheduler loop for
21422 transmission prioritization across all channels as well as among
21423 circuits on one channel. This schedule is currently tuned to
21424 (tolerantly) avoid making changes in network performance, but it
21425 should form the basis for major circuit performance increases in
21426 the future. Code by Andrea; tuning by Rob Jansen; implements
21429 o Major features (hidden services):
21430 - Make HS port scanning more difficult by immediately closing the
21431 circuit when a user attempts to connect to a nonexistent port.
21432 Closes ticket 13667.
21433 - Add a HiddenServiceStatistics option that allows Tor relays to
21434 gather and publish statistics about the overall size and volume of
21435 hidden service usage. Specifically, when this option is turned on,
21436 an HSDir will publish an approximate number of hidden services
21437 that have published descriptors to it the past 24 hours. Also, if
21438 a relay has acted as a hidden service rendezvous point, it will
21439 publish the approximate amount of rendezvous cells it has relayed
21440 the past 24 hours. The statistics themselves are obfuscated so
21441 that the exact values cannot be derived. For more details see
21442 proposal 238, "Better hidden service stats from Tor relays". This
21443 feature is currently disabled by default. Implements feature 13192.
21445 o Major bugfixes (client, automap):
21446 - Repair automapping with IPv6 addresses. This automapping should
21447 have worked previously, but one piece of debugging code that we
21448 inserted to detect a regression actually caused the regression to
21449 manifest itself again. Fixes bug 13811 and bug 12831; bugfix on
21450 0.2.4.7-alpha. Diagnosed and fixed by Francisco Blas
21453 o Major bugfixes (hidden services):
21454 - When closing an introduction circuit that was opened in parallel
21455 with others, don't mark the introduction point as unreachable.
21456 Previously, the first successful connection to an introduction
21457 point would make the other introduction points get marked as
21458 having timed out. Fixes bug 13698; bugfix on 0.0.6rc2.
21460 o Directory authority changes:
21461 - Remove turtles as a directory authority.
21462 - Add longclaw as a new (v3) directory authority. This implements
21463 ticket 13296. This keeps the directory authority count at 9.
21465 o Major removed features:
21466 - Tor clients no longer support connecting to hidden services
21467 running on Tor 0.2.2.x and earlier; the Support022HiddenServices
21468 option has been removed. (There shouldn't be any hidden services
21469 running these versions on the network.) Closes ticket 7803.
21471 o Minor features (client):
21472 - Validate hostnames in SOCKS5 requests more strictly. If SafeSocks
21473 is enabled, reject requests with IP addresses as hostnames.
21474 Resolves ticket 13315.
21476 o Minor features (controller):
21477 - Add a "SIGNAL HEARTBEAT" controller command that tells Tor to
21478 write an unscheduled heartbeat message to the log. Implements
21481 o Minor features (geoip):
21482 - Update geoip and geoip6 to the November 15 2014 Maxmind GeoLite2
21485 o Minor features (hidden services):
21486 - When re-enabling the network, don't try to build introduction
21487 circuits until we have successfully built a circuit. This makes
21488 hidden services come up faster when the network is re-enabled.
21489 Patch from "akwizgran". Closes ticket 13447.
21490 - When we fail to retrieve a hidden service descriptor, send the
21491 controller an "HS_DESC FAILED" controller event. Implements
21493 - New HiddenServiceDirGroupReadable option to cause hidden service
21494 directories and hostname files to be created group-readable. Patch
21495 from "anon", David Stainton, and "meejah". Closes ticket 11291.
21497 o Minor features (systemd):
21498 - Where supported, when running with systemd, report successful
21499 startup to systemd. Part of ticket 11016. Patch by Michael Scherer.
21500 - When running with systemd, support systemd watchdog messages. Part
21501 of ticket 11016. Patch by Michael Scherer.
21503 o Minor features (transparent proxy):
21504 - Update the transparent proxy option checks to allow for both ipfw
21505 and pf on OS X. Closes ticket 14002.
21506 - Use the correct option when using IPv6 with transparent proxy
21507 support on Linux. Resolves 13808. Patch by Francisco Blas
21510 o Minor bugfixes (preventative security, C safety):
21511 - When reading a hexadecimal, base-32, or base-64 encoded value from
21512 a string, always overwrite the whole output buffer. This prevents
21513 some bugs where we would look at (but fortunately, not reveal)
21514 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
21516 - Clear all memory targeted by tor_addr_{to,from}_sockaddr(), not
21517 just the part that's used. This makes it harder for data leak bugs
21518 to occur in the event of other programming failures. Resolves
21521 o Minor bugfixes (client, microdescriptors):
21522 - Use a full 256 bits of the SHA256 digest of a microdescriptor when
21523 computing which microdescriptors to download. This keeps us from
21524 erroneous download behavior if two microdescriptor digests ever
21525 have the same first 160 bits. Fixes part of bug 13399; bugfix
21527 - Reset a router's status if its microdescriptor digest changes,
21528 even if the first 160 bits remain the same. Fixes part of bug
21529 13399; bugfix on 0.2.3.1-alpha.
21531 o Minor bugfixes (compilation):
21532 - Silence clang warnings under --enable-expensive-hardening,
21533 including implicit truncation of 64 bit values to 32 bit, const
21534 char assignment to self, tautological compare, and additional
21535 parentheses around equality tests. Fixes bug 13577; bugfix
21537 - Fix a clang warning about checking whether an address in the
21538 middle of a structure is NULL. Fixes bug 14001; bugfix
21541 o Minor bugfixes (hidden services):
21542 - Correctly send a controller event when we find that a rendezvous
21543 circuit has finished. Fixes bug 13936; bugfix on 0.1.1.5-alpha.
21544 - Pre-check directory permissions for new hidden-services to avoid
21545 at least one case of "Bug: Acting on config options left us in a
21546 broken state. Dying." Fixes bug 13942; bugfix on 0.0.6pre1.
21547 - When adding a new hidden service (for example, via SETCONF), Tor
21548 no longer congratulates the user for running a relay. Fixes bug
21549 13941; bugfix on 0.2.6.1-alpha.
21550 - When fetching hidden service descriptors, we now check not only
21551 for whether we got the hidden service we had in mind, but also
21552 whether we got the particular descriptors we wanted. This prevents
21553 a class of inefficient but annoying DoS attacks by hidden service
21554 directories. Fixes bug 13214; bugfix on 0.2.1.6-alpha. Reported
21557 o Minor bugfixes (Linux seccomp2 sandbox):
21558 - Make transparent proxy support work along with the seccomp2
21559 sandbox. Fixes part of bug 13808; bugfix on 0.2.5.1-alpha. Patch
21560 by Francisco Blas Izquierdo Riera.
21561 - Fix a memory leak in tor-resolve when running with the sandbox
21562 enabled. Fixes bug 14050; bugfix on 0.2.5.9-rc.
21564 o Minor bugfixes (logging):
21565 - Downgrade warnings about RSA signature failures to info log level.
21566 Emit a warning when an extra info document is found incompatible
21567 with a corresponding router descriptor. Fixes bug 9812; bugfix
21569 - Make connection_ap_handshake_attach_circuit() log the circuit ID
21570 correctly. Fixes bug 13701; bugfix on 0.0.6.
21572 o Minor bugfixes (misc):
21573 - Stop allowing invalid address patterns like "*/24" that contain
21574 both a wildcard address and a bit prefix length. This affects all
21575 our address-range parsing code. Fixes bug 7484; bugfix
21578 o Minor bugfixes (testing networks, fast startup):
21579 - Allow Tor to build circuits using a consensus with no exits. If
21580 the consensus has no exits (typical of a bootstrapping test
21581 network), allow Tor to build circuits once enough descriptors have
21582 been downloaded. This assists in bootstrapping a testing Tor
21583 network. Fixes bug 13718; bugfix on 0.2.4.10-alpha. Patch
21585 - When V3AuthVotingInterval is low, give a lower If-Modified-Since
21586 header to directory servers. This allows us to obtain consensuses
21587 promptly when the consensus interval is very short. This assists
21588 in bootstrapping a testing Tor network. Fixes parts of bugs 13718
21589 and 13963; bugfix on 0.2.0.3-alpha. Patch by "teor".
21590 - Stop assuming that private addresses are local when checking
21591 reachability in a TestingTorNetwork. Instead, when testing, assume
21592 all OR connections are remote. (This is necessary due to many test
21593 scenarios running all relays on localhost.) This assists in
21594 bootstrapping a testing Tor network. Fixes bug 13924; bugfix on
21595 0.1.0.1-rc. Patch by "teor".
21596 - Avoid building exit circuits from a consensus with no exits. Now
21597 thanks to our fix for 13718, we accept a no-exit network as not
21598 wholly lost, but we need to remember not to try to build exit
21599 circuits on it. Closes ticket 13814; patch by "teor".
21600 - Stop requiring exits to have non-zero bandwithcapacity in a
21601 TestingTorNetwork. Instead, when TestingMinExitFlagThreshold is 0,
21602 ignore exit bandwidthcapacity. This assists in bootstrapping a
21603 testing Tor network. Fixes parts of bugs 13718 and 13839; bugfix
21604 on 0.2.0.3-alpha. Patch by "teor".
21605 - Add "internal" to some bootstrap statuses when no exits are
21606 available. If the consensus does not contain Exits, Tor will only
21607 build internal circuits. In this case, relevant statuses will
21608 contain the word "internal" as indicated in the Tor control-
21609 spec.txt. When bootstrap completes, Tor will be ready to build
21610 internal circuits. If a future consensus contains Exits, exit
21611 circuits may become available. Fixes part of bug 13718; bugfix on
21612 0.2.4.10-alpha. Patch by "teor".
21613 - Decrease minimum consensus interval to 10 seconds when
21614 TestingTorNetwork is set, or 5 seconds for the first consensus.
21615 Fix assumptions throughout the code that assume larger intervals.
21616 Fixes bugs 13718 and 13823; bugfix on 0.2.0.3-alpha. Patch
21618 - Avoid excluding guards from path building in minimal test
21619 networks, when we're in a test network and excluding guards would
21620 exclude all relays. This typically occurs in incredibly small tor
21621 networks, and those using "TestingAuthVoteGuard *". Fixes part of
21622 bug 13718; bugfix on 0.1.1.11-alpha. Patch by "teor".
21624 o Code simplification and refactoring:
21625 - Stop using can_complete_circuits as a global variable; access it
21626 with a function instead.
21627 - Avoid using operators directly as macro arguments: this lets us
21628 apply coccinelle transformations to our codebase more directly.
21629 Closes ticket 13172.
21630 - Combine the functions used to parse ClientTransportPlugin and
21631 ServerTransportPlugin into a single function. Closes ticket 6456.
21632 - Add inline functions and convenience macros for inspecting channel
21633 state. Refactor the code to use convenience macros instead of
21634 checking channel state directly. Fixes issue 7356.
21635 - Document all members of was_router_added_t and rename
21636 ROUTER_WAS_NOT_NEW to ROUTER_IS_ALREADY_KNOWN to make it less
21637 confusable with ROUTER_WAS_TOO_OLD. Fixes issue 13644.
21638 - In connection_exit_begin_conn(), use END_CIRC_REASON_TORPROTOCOL
21639 constant instead of hardcoded value. Fixes issue 13840.
21640 - Refactor our generic strmap and digestmap types into a single
21641 implementation, so that we can add a new digest256map
21645 - Document the bridge-authority-only 'networkstatus-bridges' file.
21646 Closes ticket 13713; patch from "tom".
21647 - Fix typo in PredictedPortsRelevanceTime option description in
21648 manpage. Resolves issue 13707.
21649 - Stop suggesting that users specify relays by nickname: it isn't a
21650 good idea. Also, properly cross-reference how to specify relays in
21651 all parts of manual documenting options that take a list of
21652 relays. Closes ticket 13381.
21653 - Clarify the HiddenServiceDir option description in manpage to make
21654 it clear that relative paths are taken with respect to the current
21655 working directory. Also clarify that this behavior is not
21656 guaranteed to remain indefinitely. Fixes issue 13913.
21659 - New tests for many parts of channel, relay, and circuitmux
21660 functionality. Code by Andrea; part of 9262.
21661 - New tests for parse_transport_line(). Part of ticket 6456.
21662 - In the unit tests, use chgrp() to change the group of the unit
21663 test temporary directory to the current user, so that the sticky
21664 bit doesn't interfere with tests that check directory groups.
21666 - Add unit tests for resolve_my_addr(). Part of ticket 12376; patch
21670 Changes in version 0.2.6.1-alpha - 2014-10-30
21671 Tor 0.2.6.1-alpha is the first release in the Tor 0.2.6.x series. It
21672 includes numerous code cleanups and new tests, and fixes a large
21673 number of annoying bugs. Out-of-memory conditions are handled better
21674 than in 0.2.5, pluggable transports have improved proxy support, and
21675 clients now use optimistic data for contacting hidden services. Also,
21676 we are now more robust to changes in what we consider a parseable
21677 directory object, so that tightening restrictions does not have a risk
21678 of introducing infinite download loops.
21680 This is the first alpha release in a new series, so expect there to be
21681 bugs. Users who would rather test out a more stable branch should stay
21682 with 0.2.5.x for now.
21684 o New compiler and system requirements:
21685 - Tor 0.2.6.x requires that your compiler support more of the C99
21686 language standard than before. The 'configure' script now detects
21687 whether your compiler supports C99 mid-block declarations and
21688 designated initializers. If it does not, Tor will not compile.
21690 We may revisit this requirement if it turns out that a significant
21691 number of people need to build Tor with compilers that don't
21692 bother implementing a 15-year-old standard. Closes ticket 13233.
21693 - Tor no longer supports systems without threading support. When we
21694 began working on Tor, there were several systems that didn't have
21695 threads, or where the thread support wasn't able to run the
21696 threads of a single process on multiple CPUs. That no longer
21697 holds: every system where Tor needs to run well now has threading
21698 support. Resolves ticket 12439.
21700 o Removed platform support:
21701 - We no longer include special code to build on Windows CE; as far
21702 as we know, nobody has used Tor on Windows CE in a very long time.
21703 Closes ticket 11446.
21705 o Major features (bridges):
21706 - Expose the outgoing upstream HTTP/SOCKS proxy to pluggable
21707 transports if they are configured via the "TOR_PT_PROXY"
21708 environment variable. Implements proposal 232. Resolves
21711 o Major features (client performance, hidden services):
21712 - Allow clients to use optimistic data when connecting to a hidden
21713 service, which should remove a round-trip from hidden service
21714 initialization. See proposal 181 for details. Implements
21717 o Major features (directory system):
21718 - Upon receiving an unparseable directory object, if its digest
21719 matches what we expected, then don't try to download it again.
21720 Previously, when we got a descriptor we didn't like, we would keep
21721 trying to download it over and over. Closes ticket 11243.
21723 o Major features (sample torrc):
21724 - Add a new, infrequently-changed "torrc.minimal". This file is
21725 similar to torrc.sample, but it will change as infrequently as
21726 possible, for the benefit of users whose systems prompt them for
21727 intervention whenever a default configuration file is changed.
21728 Making this change allows us to update torrc.sample to be a more
21729 generally useful "sample torrc".
21731 o Major bugfixes (directory authorities):
21732 - Do not assign the HSDir flag to relays if they are not Valid, or
21733 currently hibernating. Fixes 12573; bugfix on 0.2.0.10-alpha.
21735 o Major bugfixes (directory bandwidth performance):
21736 - Don't flush the zlib buffer aggressively when compressing
21737 directory information for clients. This should save about 7% of
21738 the bandwidth currently used for compressed descriptors and
21739 microdescriptors. Fixes bug 11787; bugfix on 0.1.1.23.
21741 o Minor features (security, memory wiping):
21742 - Ensure we securely wipe keys from memory after
21743 crypto_digest_get_digest and init_curve25519_keypair_from_file
21744 have finished using them. Resolves ticket 13477.
21746 o Minor features (security, out-of-memory handling):
21747 - When handling an out-of-memory condition, allocate less memory for
21748 temporary data structures. Fixes issue 10115.
21749 - When handling an out-of-memory condition, consider more types of
21750 buffers, including those on directory connections, and zlib
21751 buffers. Resolves ticket 11792.
21754 - When identity keypair is generated for first time, log a
21755 congratulatory message that links to the new relay lifecycle
21756 document. Implements feature 10427.
21758 o Minor features (client):
21759 - Clients are now willing to send optimistic data (before they
21760 receive a 'connected' cell) to relays of any version. (Relays
21761 without support for optimistic data are no longer supported on the
21762 Tor network.) Resolves ticket 13153.
21764 o Minor features (directory authorities):
21765 - Don't list relays with a bandwidth estimate of 0 in the consensus.
21766 Implements a feature proposed during discussion of bug 13000.
21767 - In tor-gencert, report an error if the user provides the same
21768 argument more than once.
21769 - If a directory authority can't find a best consensus method in the
21770 votes that it holds, it now falls back to its favorite consensus
21771 method. Previously, it fell back to method 1. Neither of these is
21772 likely to get enough signatures, but "fall back to favorite"
21773 doesn't require us to maintain support an obsolete consensus
21774 method. Implements part of proposal 215.
21776 o Minor features (logging):
21777 - On Unix-like systems, you can now use named pipes as the target of
21778 the Log option, and other options that try to append to files.
21779 Closes ticket 12061. Patch from "carlo von lynX".
21780 - When opening a log file at startup, send it every log message that
21781 we generated between startup and opening it. Previously, log
21782 messages that were generated before opening the log file were only
21783 logged to stdout. Closes ticket 6938.
21784 - Add a TruncateLogFile option to overwrite logs instead of
21785 appending to them. Closes ticket 5583.
21787 o Minor features (portability, Solaris):
21788 - Threads are no longer disabled by default on Solaris; we believe
21789 that the versions of Solaris with broken threading support are all
21790 obsolete by now. Resolves ticket 9495.
21792 o Minor features (relay):
21793 - Re-check our address after we detect a changed IP address from
21794 getsockname(). This ensures that the controller command "GETINFO
21795 address" will report the correct value. Resolves ticket 11582.
21797 - A new AccountingRule option lets Relays set whether they'd like
21798 AccountingMax to be applied separately to inbound and outbound
21799 traffic, or applied to the sum of inbound and outbound traffic.
21800 Resolves ticket 961. Patch by "chobe".
21802 o Minor features (testing networks):
21803 - Add the TestingDirAuthVoteExit option, which lists nodes to assign
21804 the "Exit" flag regardless of their uptime, bandwidth, or exit
21805 policy. TestingTorNetwork must be set for this option to have any
21806 effect. Previously, authorities would take up to 35 minutes to
21807 give nodes the Exit flag in a test network. Partially implements
21810 o Minor features (validation):
21811 - Check all date/time values passed to tor_timegm and
21812 parse_rfc1123_time for validity, taking leap years into account.
21813 Improves HTTP header validation. Implemented with bug 13476.
21814 - In correct_tm(), limit the range of values returned by system
21815 localtime(_r) and gmtime(_r) to be between the years 1 and 8099.
21816 This means we don't have to deal with negative or too large dates,
21817 even if a clock is wrong. Otherwise we might fail to read a file
21818 written by us which includes such a date. Fixes bug 13476.
21820 o Minor bugfixes (bridge clients):
21821 - When configured to use a bridge without an identity digest (not
21822 recommended), avoid launching an extra channel to it when
21823 bootstrapping. Fixes bug 7733; bugfix on 0.2.4.4-alpha.
21825 o Minor bugfixes (bridges):
21826 - When DisableNetwork is set, do not launch pluggable transport
21827 plugins, and if any are running, terminate them. Fixes bug 13213;
21828 bugfix on 0.2.3.6-alpha.
21830 o Minor bugfixes (C correctness):
21831 - Fix several instances of possible integer overflow/underflow/NaN.
21832 Fixes bug 13104; bugfix on 0.2.3.1-alpha and later. Patches
21834 - In circuit_build_times_calculate_timeout() in circuitstats.c,
21835 avoid dividing by zero in the pareto calculations. This traps
21836 under clang's "undefined-trap" sanitizer. Fixes bug 13290; bugfix
21838 - Fix an integer overflow in format_time_interval(). Fixes bug
21839 13393; bugfix on 0.2.0.10-alpha.
21840 - Set the correct day of year value when the system's localtime(_r)
21841 or gmtime(_r) functions fail to set struct tm. Not externally
21842 visible. Fixes bug 13476; bugfix on 0.0.2pre14.
21843 - Avoid unlikely signed integer overflow in tor_timegm on systems
21844 with 32-bit time_t. Fixes bug 13476; bugfix on 0.0.2pre14.
21846 o Minor bugfixes (client):
21847 - Fix smartlist_choose_node_by_bandwidth() so that relays with the
21848 BadExit flag are not considered worthy candidates. Fixes bug
21849 13066; bugfix on 0.1.2.3-alpha.
21850 - Use the consensus schedule for downloading consensuses, and not
21851 the generic schedule. Fixes bug 11679; bugfix on 0.2.2.6-alpha.
21852 - Handle unsupported or malformed SOCKS5 requests properly by
21853 responding with the appropriate error message before closing the
21854 connection. Fixes bugs 12971 and 13314; bugfix on 0.0.2pre13.
21856 o Minor bugfixes (client, torrc):
21857 - Stop modifying the value of our DirReqStatistics torrc option just
21858 because we're not a bridge or relay. This bug was causing Tor
21859 Browser users to write "DirReqStatistics 0" in their torrc files
21860 as if they had chosen to change the config. Fixes bug 4244; bugfix
21862 - When GeoIPExcludeUnknown is enabled, do not incorrectly decide
21863 that our options have changed every time we SIGHUP. Fixes bug
21864 9801; bugfix on 0.2.4.10-alpha. Patch from "qwerty1".
21866 o Minor bugfixes (controller):
21867 - Return an error when the second or later arguments of the
21868 "setevents" controller command are invalid events. Previously we
21869 would return success while silently skipping invalid events. Fixes
21870 bug 13205; bugfix on 0.2.3.2-alpha. Reported by "fpxnns".
21872 o Minor bugfixes (directory system):
21873 - Always believe that v3 directory authorities serve extra-info
21874 documents, whether they advertise "caches-extra-info" or not.
21875 Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
21876 - When running as a v3 directory authority, advertise that you serve
21877 extra-info documents so that clients who want them can find them
21878 from you too. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
21879 - Check the BRIDGE_DIRINFO flag bitwise rather than using equality.
21880 Previously, directories offering BRIDGE_DIRINFO and some other
21881 flag (i.e. microdescriptors or extrainfo) would be ignored when
21882 looking for bridges. Partially fixes bug 13163; bugfix
21885 o Minor bugfixes (networking):
21886 - Check for orconns and use connection_or_close_for_error() rather
21887 than connection_mark_for_close() directly in the getsockopt()
21888 failure case of connection_handle_write_impl(). Fixes bug 11302;
21889 bugfix on 0.2.4.4-alpha.
21891 o Minor bugfixes (relay):
21892 - When generating our family list, remove spaces from around the
21893 entries. Fixes bug 12728; bugfix on 0.2.1.7-alpha.
21894 - If our previous bandwidth estimate was 0 bytes, allow publishing a
21895 new relay descriptor immediately. Fixes bug 13000; bugfix
21898 o Minor bugfixes (testing networks):
21899 - Fix TestingDirAuthVoteGuard to properly give out Guard flags in a
21900 testing network. Fixes bug 13064; bugfix on 0.2.5.2-alpha.
21901 - Stop using the default authorities in networks which provide both
21902 AlternateDirAuthority and AlternateBridgeAuthority. Partially
21903 fixes bug 13163; bugfix on 0.2.0.13-alpha.
21905 o Minor bugfixes (testing):
21906 - Stop spawn test failures due to a race condition between the
21907 SIGCHLD handler updating the process status, and the test reading
21908 it. Fixes bug 13291; bugfix on 0.2.3.3-alpha.
21910 o Minor bugfixes (testing, Windows):
21911 - Avoid passing an extra backslash when creating a temporary
21912 directory for running the unit tests on Windows. Fixes bug 12392;
21913 bugfix on 0.2.2.25-alpha. Patch from Gisle Vanem.
21915 o Minor bugfixes (windows):
21916 - Remove code to special-case handling of NTE_BAD_KEYSET when
21917 acquiring windows CryptoAPI context. This error can't actually
21918 occur for the parameters we're providing. Fixes bug 10816; bugfix
21921 o Minor bugfixes (zlib):
21922 - Avoid truncating a zlib stream when trying to finalize it with an
21923 empty output buffer. Fixes bug 11824; bugfix on 0.1.1.23.
21926 - Allow our configure script to build correctly with autoconf 2.62
21927 again. Fixes bug 12693; bugfix on 0.2.5.2-alpha.
21928 - Improve the error message from ./configure to make it clear that
21929 when asciidoc has not been found, the user will have to either add
21930 --disable-asciidoc argument or install asciidoc. Resolves
21933 o Code simplification and refactoring:
21934 - Change the entry_is_live() function to take named bitfield
21935 elements instead of an unnamed list of booleans. Closes
21937 - Refactor and unit-test entry_is_time_to_retry() in entrynodes.c.
21938 Resolves ticket 12205.
21939 - Use calloc and reallocarray functions instead of multiply-
21940 then-malloc. This makes it less likely for us to fall victim to an
21941 integer overflow attack when allocating. Resolves ticket 12855.
21942 - Use the standard macro name SIZE_MAX, instead of our
21944 - Document usage of the NO_DIRINFO and ALL_DIRINFO flags clearly in
21945 functions which take them as arguments. Replace 0 with NO_DIRINFO
21946 in a function call for clarity. Seeks to prevent future issues
21948 - Avoid 4 null pointer errors under clang static analysis by using
21949 tor_assert() to prove that the pointers aren't null. Fixes
21951 - Rework the API of policies_parse_exit_policy() to use a bitmask to
21952 represent parsing options, instead of a confusing mess of
21953 booleans. Resolves ticket 8197.
21954 - Introduce a helper function to parse ExitPolicy in
21955 or_options_t structure.
21958 - Add a doc/TUNING document with tips for handling large numbers of
21959 TCP connections when running busy Tor relay. Update the warning
21960 message to point to this file when running out of sockets
21961 operating system is allowing to use simultaneously. Resolves
21964 o Removed features:
21965 - We no longer remind the user about configuration options that have
21966 been obsolete since 0.2.3.x or earlier. Patch by Adrien Bak.
21967 - Remove our old, non-weighted bandwidth-based node selection code.
21968 Previously, we used it as a fallback when we couldn't perform
21969 weighted bandwidth-based node selection. But that would only
21970 happen in the cases where we had no consensus, or when we had a
21971 consensus generated by buggy or ancient directory authorities. In
21972 either case, it's better to use the more modern, better maintained
21973 algorithm, with reasonable defaults for the weights. Closes
21975 - Remove the --disable-curve25519 configure option. Relays and
21976 clients now are required to support curve25519 and the
21978 - The old "StrictEntryNodes" and "StrictExitNodes" options, which
21979 used to be deprecated synonyms for "StrictNodes", are now marked
21980 obsolete. Resolves ticket 12226.
21981 - Clients don't understand the BadDirectory flag in the consensus
21982 anymore, and ignore it.
21985 - Refactor the function that chooses guard nodes so that it can more
21986 easily be tested; write some tests for it.
21987 - Fix and re-enable the fgets_eagain unit test. Fixes bug 12503;
21988 bugfix on 0.2.3.1-alpha. Patch from "cypherpunks."
21989 - Create unit tests for format_time_interval(). With bug 13393.
21990 - Add unit tests for tor_timegm signed overflow, tor_timegm and
21991 parse_rfc1123_time validity checks, correct_tm year clamping. Unit
21992 tests (visible) fixes in bug 13476.
21993 - Add a "coverage-html" make target to generate HTML-visualized
21994 coverage results when building with --enable-coverage. (Requires
21995 lcov.) Patch from Kevin Murray.
21996 - Enable the backtrace handler (where supported) when running the
21998 - Revise all unit tests that used the legacy test_* macros to
21999 instead use the recommended tt_* macros. This patch was generated
22000 with coccinelle, to avoid manual errors. Closes ticket 13119.
22002 o Distribution (systemd):
22003 - systemd unit file: only allow tor to write to /var/lib/tor and
22004 /var/log/tor. The rest of the filesystem is accessible for reading
22005 only. Patch by intrigeri; resolves ticket 12751.
22006 - systemd unit file: ensure that the process and all its children
22007 can never gain new privileges. Patch by intrigeri; resolves
22009 - systemd unit file: set up /var/run/tor as writable for the Tor
22010 service. Patch by intrigeri; resolves ticket 13196.
22012 o Removed features (directory authorities):
22013 - Remove code that prevented authorities from listing Tor relays
22014 affected by CVE-2011-2769 as guards. These relays are already
22015 rejected altogether due to the minimum version requirement of
22016 0.2.3.16-alpha. Closes ticket 13152.
22017 - The "AuthDirRejectUnlisted" option no longer has any effect, as
22018 the fingerprints file (approved-routers) has been deprecated.
22019 - Directory authorities do not support being Naming dirauths anymore.
22020 The "NamingAuthoritativeDir" config option is now obsolete.
22021 - Directory authorities do not support giving out the BadDirectory
22023 - Directory authorities no longer advertise or support consensus
22024 methods 1 through 12 inclusive. These consensus methods were
22025 obsolete and/or insecure: maintaining the ability to support them
22026 served no good purpose. Implements part of proposal 215; closes
22029 o Testing (test-network.sh):
22030 - Stop using "echo -n", as some shells' built-in echo doesn't
22031 support "-n". Instead, use "/bin/echo -n". Partially fixes
22033 - Stop an apparent test-network hang when used with make -j2. Fixes
22035 - Add a --delay option to test-network.sh, which configures the
22036 delay before the chutney network tests for data transmission.
22037 Partially implements ticket 13161.
22040 Changes in version 0.2.5.10 - 2014-10-24
22041 Tor 0.2.5.10 is the first stable release in the 0.2.5 series.
22043 It adds several new security features, including improved
22044 denial-of-service resistance for relays, new compiler hardening
22045 options, and a system-call sandbox for hardened installations on Linux
22046 (requires seccomp2). The controller protocol has several new features,
22047 resolving IPv6 addresses should work better than before, and relays
22048 should be a little more CPU-efficient. We've added support for more
22049 OpenBSD and FreeBSD transparent proxy types. We've improved the build
22050 system and testing infrastructure to allow unit testing of more parts
22051 of the Tor codebase. Finally, we've addressed several nagging pluggable
22052 transport usability issues, and included numerous other small bugfixes
22053 and features mentioned below.
22055 This release marks end-of-life for Tor 0.2.3.x; those Tor versions
22056 have accumulated many known flaws; everyone should upgrade.
22058 o Deprecated versions:
22059 - Tor 0.2.3.x has reached end-of-life; it has received no patches or
22060 attention for some while.
22063 Changes in version 0.2.5.9-rc - 2014-10-20
22064 Tor 0.2.5.9-rc is the third release candidate for the Tor 0.2.5.x
22065 series. It disables SSL3 in response to the recent "POODLE" attack
22066 (even though POODLE does not affect Tor). It also works around a crash
22067 bug caused by some operating systems' response to the "POODLE" attack
22068 (which does affect Tor). It also contains a few miscellaneous fixes.
22070 o Major security fixes:
22071 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
22072 today support TLS 1.0 or later, so we can safely turn off support
22073 for this old (and insecure) protocol. Fixes bug 13426.
22075 o Major bugfixes (openssl bug workaround):
22076 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
22077 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
22078 13471. This is a workaround for an OpenSSL bug.
22081 - Disable the sandbox name resolver cache when running tor-resolve:
22082 tor-resolve doesn't use the sandbox code, and turning it on was
22083 breaking attempts to do tor-resolve on a non-default server on
22084 Linux. Fixes bug 13295; bugfix on 0.2.5.3-alpha.
22086 o Compilation fixes:
22087 - Build and run correctly on systems like OpenBSD-current that have
22088 patched OpenSSL to remove get_cipher_by_char and/or its
22089 implementations. Fixes issue 13325.
22091 o Downgraded warnings:
22092 - Downgrade the severity of the 'unexpected sendme cell from client'
22093 from 'warn' to 'protocol warning'. Closes ticket 8093.
22096 Changes in version 0.2.4.25 - 2014-10-20
22097 Tor 0.2.4.25 disables SSL3 in response to the recent "POODLE" attack
22098 (even though POODLE does not affect Tor). It also works around a crash
22099 bug caused by some operating systems' response to the "POODLE" attack
22100 (which does affect Tor).
22102 o Major security fixes (also in 0.2.5.9-rc):
22103 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
22104 today support TLS 1.0 or later, so we can safely turn off support
22105 for this old (and insecure) protocol. Fixes bug 13426.
22107 o Major bugfixes (openssl bug workaround, also in 0.2.5.9-rc):
22108 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
22109 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
22110 13471. This is a workaround for an OpenSSL bug.
22113 Changes in version 0.2.5.8-rc - 2014-09-22
22114 Tor 0.2.5.8-rc is the second release candidate for the Tor 0.2.5.x
22115 series. It fixes a bug that affects consistency and speed when
22116 connecting to hidden services, and it updates the location of one of
22117 the directory authorities.
22120 - Clients now send the correct address for their chosen rendezvous
22121 point when trying to access a hidden service. They used to send
22122 the wrong address, which would still work some of the time because
22123 they also sent the identity digest of the rendezvous point, and if
22124 the hidden service happened to try connecting to the rendezvous
22125 point from a relay that already had a connection open to it,
22126 the relay would reuse that connection. Now connections to hidden
22127 services should be more robust and faster. Also, this bug meant
22128 that clients were leaking to the hidden service whether they were
22129 on a little-endian (common) or big-endian (rare) system, which for
22130 some users might have reduced their anonymity. Fixes bug 13151;
22131 bugfix on 0.2.1.5-alpha.
22133 o Directory authority changes:
22134 - Change IP address for gabelmoo (v3 directory authority).
22137 Changes in version 0.2.4.24 - 2014-09-22
22138 Tor 0.2.4.24 fixes a bug that affects consistency and speed when
22139 connecting to hidden services, and it updates the location of one of
22140 the directory authorities.
22143 - Clients now send the correct address for their chosen rendezvous
22144 point when trying to access a hidden service. They used to send
22145 the wrong address, which would still work some of the time because
22146 they also sent the identity digest of the rendezvous point, and if
22147 the hidden service happened to try connecting to the rendezvous
22148 point from a relay that already had a connection open to it,
22149 the relay would reuse that connection. Now connections to hidden
22150 services should be more robust and faster. Also, this bug meant
22151 that clients were leaking to the hidden service whether they were
22152 on a little-endian (common) or big-endian (rare) system, which for
22153 some users might have reduced their anonymity. Fixes bug 13151;
22154 bugfix on 0.2.1.5-alpha.
22156 o Directory authority changes:
22157 - Change IP address for gabelmoo (v3 directory authority).
22159 o Minor features (geoip):
22160 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
22164 Changes in version 0.2.5.7-rc - 2014-09-11
22165 Tor 0.2.5.7-rc fixes several regressions from earlier in the 0.2.5.x
22166 release series, and some long-standing bugs related to ORPort reachability
22167 testing and failure to send CREATE cells. It is the first release
22168 candidate for the Tor 0.2.5.x series.
22170 o Major bugfixes (client, startup):
22171 - Start making circuits as soon as DisabledNetwork is turned off.
22172 When Tor started with DisabledNetwork set, it would correctly
22173 conclude that it shouldn't build circuits, but it would mistakenly
22174 cache this conclusion, and continue believing it even when
22175 DisableNetwork is set to 0. Fixes the bug introduced by the fix
22176 for bug 11200; bugfix on 0.2.5.4-alpha.
22177 - Resume expanding abbreviations for command-line options. The fix
22178 for bug 4647 accidentally removed our hack from bug 586 that
22179 rewrote HashedControlPassword to __HashedControlSessionPassword
22180 when it appears on the commandline (which allowed the user to set
22181 her own HashedControlPassword in the torrc file while the
22182 controller generates a fresh session password for each run). Fixes
22183 bug 12948; bugfix on 0.2.5.1-alpha.
22184 - Warn about attempts to run hidden services and relays in the same
22185 process: that's probably not a good idea. Closes ticket 12908.
22187 o Major bugfixes (relay):
22188 - Avoid queuing or sending destroy cells for circuit ID zero when we
22189 fail to send a CREATE cell. Fixes bug 12848; bugfix on 0.0.8pre1.
22190 Found and fixed by "cypherpunks".
22191 - Fix ORPort reachability detection on relays running behind a
22192 proxy, by correctly updating the "local" mark on the controlling
22193 channel when changing the address of an or_connection_t after the
22194 handshake. Fixes bug 12160; bugfix on 0.2.4.4-alpha.
22196 o Minor features (bridge):
22197 - Add an ExtORPortCookieAuthFileGroupReadable option to make the
22198 cookie file for the ExtORPort g+r by default.
22200 o Minor features (geoip):
22201 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
22204 o Minor bugfixes (logging):
22205 - Reduce the log severity of the "Pluggable transport proxy does not
22206 provide any needed transports and will not be launched." message,
22207 since Tor Browser includes several ClientTransportPlugin lines in
22208 its torrc-defaults file, leading every Tor Browser user who looks
22209 at her logs to see these notices and wonder if they're dangerous.
22210 Resolves bug 13124; bugfix on 0.2.5.3-alpha.
22211 - Downgrade "Unexpected onionskin length after decryption" warning
22212 to a protocol-warn, since there's nothing relay operators can do
22213 about a client that sends them a malformed create cell. Resolves
22214 bug 12996; bugfix on 0.0.6rc1.
22215 - Log more specific warnings when we get an ESTABLISH_RENDEZVOUS
22216 cell on a cannibalized or non-OR circuit. Resolves ticket 12997.
22217 - When logging information about an EXTEND2 or EXTENDED2 cell, log
22218 their names correctly. Fixes part of bug 12700; bugfix
22220 - When logging information about a relay cell whose command we don't
22221 recognize, log its command as an integer. Fixes part of bug 12700;
22222 bugfix on 0.2.1.10-alpha.
22223 - Escape all strings from the directory connection before logging
22224 them. Fixes bug 13071; bugfix on 0.1.1.15. Patch from "teor".
22226 o Minor bugfixes (controller):
22227 - Restore the functionality of CookieAuthFileGroupReadable. Fixes
22228 bug 12864; bugfix on 0.2.5.1-alpha.
22229 - Actually send TRANSPORT_LAUNCHED and HS_DESC events to
22230 controllers. Fixes bug 13085; bugfix on 0.2.5.1-alpha. Patch
22233 o Minor bugfixes (compilation):
22234 - Fix compilation of test.h with MSVC. Patch from Gisle Vanem;
22235 bugfix on 0.2.5.5-alpha.
22236 - Make the nmake make files work again. Fixes bug 13081. Bugfix on
22237 0.2.5.1-alpha. Patch from "NewEraCracker".
22238 - In routerlist_assert_ok(), don't take the address of a
22239 routerinfo's cache_info member unless that routerinfo is non-NULL.
22240 Fixes bug 13096; bugfix on 0.1.1.9-alpha. Patch by "teor".
22241 - Fix a large number of false positive warnings from the clang
22242 analyzer static analysis tool. This should make real warnings
22243 easier for clang analyzer to find. Patch from "teor". Closes
22246 o Distribution (systemd):
22247 - Verify configuration file via ExecStartPre in the systemd unit
22248 file. Patch from intrigeri; resolves ticket 12730.
22249 - Explicitly disable RunAsDaemon in the systemd unit file. Our
22250 current systemd unit uses "Type = simple", so systemd does not
22251 expect tor to fork. If the user has "RunAsDaemon 1" in their
22252 torrc, then things won't work as expected. This is e.g. the case
22253 on Debian (and derivatives), since there we pass "--defaults-torrc
22254 /usr/share/tor/tor-service-defaults-torrc" (that contains
22255 "RunAsDaemon 1") by default. Patch by intrigeri; resolves
22259 - Adjust the URLs in the README to refer to the new locations of
22260 several documents on the website. Fixes bug 12830. Patch from
22262 - Document 'reject6' and 'accept6' ExitPolicy entries. Resolves
22266 Changes in version 0.2.5.6-alpha - 2014-07-28
22267 Tor 0.2.5.6-alpha brings us a big step closer to slowing down the
22268 risk from guard rotation, and fixes a variety of other issues to get
22269 us closer to a release candidate.
22271 o Major features (also in 0.2.4.23):
22272 - Make the number of entry guards configurable via a new
22273 NumEntryGuards consensus parameter, and the number of directory
22274 guards configurable via a new NumDirectoryGuards consensus
22275 parameter. Implements ticket 12688.
22277 o Major bugfixes (also in 0.2.4.23):
22278 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
22279 implementation that caused incorrect results on 32-bit
22280 implementations when certain malformed inputs were used along with
22281 a small class of private ntor keys. This bug does not currently
22282 appear to allow an attacker to learn private keys or impersonate a
22283 Tor server, but it could provide a means to distinguish 32-bit Tor
22284 implementations from 64-bit Tor implementations. Fixes bug 12694;
22285 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
22289 - Perform circuit cleanup operations even when circuit
22290 construction operations are disabled (because the network is
22291 disabled, or because there isn't enough directory information).
22292 Previously, when we were not building predictive circuits, we
22293 were not closing expired circuits either. Fixes bug 8387; bugfix on
22294 0.1.1.11-alpha. This bug became visible in 0.2.4.10-alpha when we
22295 became more strict about when we have "enough directory information
22296 to build circuits".
22299 - Authorities now assign the Guard flag to the fastest 25% of the
22300 network (it used to be the fastest 50%). Also raise the consensus
22301 weight that guarantees the Guard flag from 250 to 2000. For the
22302 current network, this results in about 1100 guards, down from 2500.
22303 This step paves the way for moving the number of entry guards
22304 down to 1 (proposal 236) while still providing reasonable expected
22305 performance for most users. Implements ticket 12690.
22306 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
22308 - Slightly enhance the diagnostic message for bug 12184.
22310 o Minor bugfixes (also in 0.2.4.23):
22311 - Warn and drop the circuit if we receive an inbound 'relay early'
22312 cell. Those used to be normal to receive on hidden service circuits
22313 due to bug 1038, but the buggy Tor versions are long gone from
22314 the network so we can afford to resume watching for them. Resolves
22315 the rest of bug 1038; bugfix on 0.2.1.19.
22316 - Correct a confusing error message when trying to extend a circuit
22317 via the control protocol but we don't know a descriptor or
22318 microdescriptor for one of the specified relays. Fixes bug 12718;
22319 bugfix on 0.2.3.1-alpha.
22322 - Fix compilation when building with bufferevents enabled. (This
22323 configuration is still not expected to work, however.)
22324 Fixes bugs 12438, 12474, 11578; bugfixes on 0.2.5.1-alpha and
22325 0.2.5.3-alpha. Patches from Anthony G. Basile and Sathyanarayanan
22327 - Compile correctly with builds and forks of OpenSSL (such as
22328 LibreSSL) that disable compression. Fixes bug 12602; bugfix on
22329 0.2.1.1-alpha. Patch from "dhill".
22332 Changes in version 0.2.4.23 - 2014-07-28
22333 Tor 0.2.4.23 brings us a big step closer to slowing down the risk from
22334 guard rotation, and also backports several important fixes from the
22335 Tor 0.2.5 alpha release series.
22338 - Clients now look at the "usecreatefast" consensus parameter to
22339 decide whether to use CREATE_FAST or CREATE cells for the first hop
22340 of their circuit. This approach can improve security on connections
22341 where Tor's circuit handshake is stronger than the available TLS
22342 connection security levels, but the tradeoff is more computational
22343 load on guard relays. Implements proposal 221. Resolves ticket 9386.
22344 - Make the number of entry guards configurable via a new
22345 NumEntryGuards consensus parameter, and the number of directory
22346 guards configurable via a new NumDirectoryGuards consensus
22347 parameter. Implements ticket 12688.
22350 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
22351 implementation that caused incorrect results on 32-bit
22352 implementations when certain malformed inputs were used along with
22353 a small class of private ntor keys. This bug does not currently
22354 appear to allow an attacker to learn private keys or impersonate a
22355 Tor server, but it could provide a means to distinguish 32-bit Tor
22356 implementations from 64-bit Tor implementations. Fixes bug 12694;
22357 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
22361 - Warn and drop the circuit if we receive an inbound 'relay early'
22362 cell. Those used to be normal to receive on hidden service circuits
22363 due to bug 1038, but the buggy Tor versions are long gone from
22364 the network so we can afford to resume watching for them. Resolves
22365 the rest of bug 1038; bugfix on 0.2.1.19.
22366 - Correct a confusing error message when trying to extend a circuit
22367 via the control protocol but we don't know a descriptor or
22368 microdescriptor for one of the specified relays. Fixes bug 12718;
22369 bugfix on 0.2.3.1-alpha.
22370 - Avoid an illegal read from stack when initializing the TLS
22371 module using a version of OpenSSL without all of the ciphers
22372 used by the v2 link handshake. Fixes bug 12227; bugfix on
22373 0.2.4.8-alpha. Found by "starlight".
22376 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
22380 Changes in version 0.2.5.5-alpha - 2014-06-18
22381 Tor 0.2.5.5-alpha fixes a wide variety of remaining issues in the Tor
22382 0.2.5.x release series, including a couple of DoS issues, some
22383 performance regressions, a large number of bugs affecting the Linux
22384 seccomp2 sandbox code, and various other bugfixes. It also adds
22385 diagnostic bugfixes for a few tricky issues that we're trying to
22388 o Major features (security, traffic analysis resistance):
22389 - Several major improvements to the algorithm used to decide when to
22390 close TLS connections. Previous versions of Tor closed connections
22391 at a fixed interval after the last time a non-padding cell was
22392 sent over the connection, regardless of the target of the
22393 connection. Now, we randomize the intervals by adding up to 50% of
22394 their base value, we measure the length of time since connection
22395 last had at least one circuit, and we allow connections to known
22396 ORs to remain open a little longer (15 minutes instead of 3
22397 minutes minimum). These changes should improve Tor's resistance
22398 against some kinds of traffic analysis, and lower some overhead
22399 from needlessly closed connections. Fixes ticket 6799.
22400 Incidentally fixes ticket 12023; bugfix on 0.2.5.1-alpha.
22402 o Major bugfixes (security, OOM, new since 0.2.5.4-alpha, also in 0.2.4.22):
22403 - Fix a memory leak that could occur if a microdescriptor parse
22404 fails during the tokenizing step. This bug could enable a memory
22405 exhaustion attack by directory servers. Fixes bug 11649; bugfix
22408 o Major bugfixes (security, directory authorities):
22409 - Directory authorities now include a digest of each relay's
22410 identity key as a part of its microdescriptor.
22412 This is a workaround for bug 11743 (reported by "cypherpunks"),
22413 where Tor clients do not support receiving multiple
22414 microdescriptors with the same SHA256 digest in the same
22415 consensus. When clients receive a consensus like this, they only
22416 use one of the relays. Without this fix, a hostile relay could
22417 selectively disable some client use of target relays by
22418 constructing a router descriptor with a different identity and the
22419 same microdescriptor parameters and getting the authorities to
22420 list it in a microdescriptor consensus. This fix prevents an
22421 attacker from causing a microdescriptor collision, because the
22422 router's identity is not forgeable.
22424 o Major bugfixes (relay):
22425 - Use a direct dirport connection when uploading non-anonymous
22426 descriptors to the directory authorities. Previously, relays would
22427 incorrectly use tunnel connections under a fairly wide variety of
22428 circumstances. Fixes bug 11469; bugfix on 0.2.4.3-alpha.
22429 - When a circuit accidentally has the same circuit ID for its
22430 forward and reverse direction, correctly detect the direction of
22431 cells using that circuit. Previously, this bug made roughly one
22432 circuit in a million non-functional. Fixes bug 12195; this is a
22433 bugfix on every version of Tor.
22435 o Major bugfixes (client, pluggable transports):
22436 - When managing pluggable transports, use OS notification facilities
22437 to learn if they have crashed, and don't attempt to kill any
22438 process that has already exited. Fixes bug 8746; bugfix
22441 o Minor features (diagnostic):
22442 - When logging a warning because of bug 7164, additionally check the
22443 hash table for consistency (as proposed on ticket 11737). This may
22444 help diagnose bug 7164.
22445 - When we log a heartbeat, log how many one-hop circuits we have
22446 that are at least 30 minutes old, and log status information about
22447 a few of them. This is an attempt to track down bug 8387.
22448 - When encountering an unexpected CR while writing text to a file on
22449 Windows, log the name of the file. Should help diagnosing
22451 - Give more specific warnings when a client notices that an onion
22452 handshake has failed. Fixes ticket 9635.
22453 - Add significant new logging code to attempt to diagnose bug 12184,
22454 where relays seem to run out of available circuit IDs.
22455 - Improve the diagnostic log message for bug 8387 even further to
22456 try to improve our odds of figuring out why one-hop directory
22457 circuits sometimes do not get closed.
22459 o Minor features (security, memory management):
22460 - Memory allocation tricks (mempools and buffer freelists) are now
22461 disabled by default. You can turn them back on with
22462 --enable-mempools and --enable-buf-freelists respectively. We're
22463 disabling these features because malloc performance is good enough
22464 on most platforms, and a similar feature in OpenSSL exacerbated
22465 exploitation of the Heartbleed attack. Resolves ticket 11476.
22467 o Minor features (security):
22468 - Apply the secure SipHash-2-4 function to the hash table mapping
22469 circuit IDs and channels to circuits. We missed this one when we
22470 were converting all the other hash functions to use SipHash back
22471 in 0.2.5.3-alpha. Resolves ticket 11750.
22473 o Minor features (build):
22474 - The configure script has a --disable-seccomp option to turn off
22475 support for libseccomp on systems that have it, in case it (or
22476 Tor's use of it) is broken. Resolves ticket 11628.
22478 o Minor features (other):
22479 - Update geoip and geoip6 to the June 4 2014 Maxmind GeoLite2
22482 o Minor bugfixes (security, new since 0.2.5.4-alpha, also in 0.2.4.22):
22483 - When running a hidden service, do not allow TunneledDirConns 0;
22484 this will keep the hidden service from running, and also
22485 make it publish its descriptors directly over HTTP. Fixes bug 10849;
22486 bugfix on 0.2.1.1-alpha.
22488 o Minor bugfixes (performance):
22489 - Avoid a bug where every successful connection made us recompute
22490 the flag telling us whether we have sufficient information to
22491 build circuits. Previously, we would forget our cached value
22492 whenever we successfully opened a channel (or marked a router as
22493 running or not running for any other reason), regardless of
22494 whether we had previously believed the router to be running. This
22495 forced us to run an expensive update operation far too often.
22496 Fixes bug 12170; bugfix on 0.1.2.1-alpha.
22497 - Avoid using tor_memeq() for checking relay cell integrity. This
22498 removes a possible performance bottleneck. Fixes part of bug
22499 12169; bugfix on 0.2.1.31.
22501 o Minor bugfixes (compilation):
22502 - Fix compilation of test_status.c when building with MVSC. Bugfix
22503 on 0.2.5.4-alpha. Patch from Gisle Vanem.
22504 - Resolve GCC complaints on OpenBSD about discarding constness in
22505 TO_{ORIGIN,OR}_CIRCUIT functions. Fixes part of bug 11633; bugfix
22506 on 0.1.1.23. Patch from Dana Koch.
22507 - Resolve clang complaints on OpenBSD with -Wshorten-64-to-32 due to
22508 treatment of long and time_t as comparable types. Fixes part of
22509 bug 11633. Patch from Dana Koch.
22510 - Make Tor compile correctly with --disable-buf-freelists. Fixes bug
22511 11623; bugfix on 0.2.5.3-alpha.
22512 - When deciding whether to build the 64-bit curve25519
22513 implementation, detect platforms where we can compile 128-bit
22514 arithmetic but cannot link it. Fixes bug 11729; bugfix on
22515 0.2.4.8-alpha. Patch from "conradev".
22516 - Fix compilation when DNS_CACHE_DEBUG is enabled. Fixes bug 11761;
22517 bugfix on 0.2.3.13-alpha. Found by "cypherpunks".
22518 - Fix compilation with dmalloc. Fixes bug 11605; bugfix
22521 o Minor bugfixes (Directory server):
22522 - When sending a compressed set of descriptors or microdescriptors,
22523 make sure to finalize the zlib stream. Previously, we would write
22524 all the compressed data, but if the last descriptor we wanted to
22525 send was missing or too old, we would not mark the stream as
22526 finished. This caused problems for decompression tools. Fixes bug
22527 11648; bugfix on 0.1.1.23.
22529 o Minor bugfixes (Linux seccomp sandbox):
22530 - Make the seccomp sandbox code compile under ARM Linux. Fixes bug
22531 11622; bugfix on 0.2.5.1-alpha.
22532 - Avoid crashing when re-opening listener ports with the seccomp
22533 sandbox active. Fixes bug 12115; bugfix on 0.2.5.1-alpha.
22534 - Avoid crashing with the seccomp sandbox enabled along with
22535 ConstrainedSockets. Fixes bug 12139; bugfix on 0.2.5.1-alpha.
22536 - When we receive a SIGHUP with the sandbox enabled, correctly
22537 support rotating our log files. Fixes bug 12032; bugfix
22539 - Avoid crash when running with sandboxing enabled and
22540 DirReqStatistics not disabled. Fixes bug 12035; bugfix
22542 - Fix a "BUG" warning when trying to write bridge-stats files with
22543 the Linux syscall sandbox filter enabled. Fixes bug 12041; bugfix
22545 - Prevent the sandbox from crashing on startup when run with the
22546 --enable-expensive-hardening configuration option. Fixes bug
22547 11477; bugfix on 0.2.5.4-alpha.
22548 - When running with DirPortFrontPage and sandboxing both enabled,
22549 reload the DirPortFrontPage correctly when restarting. Fixes bug
22550 12028; bugfix on 0.2.5.1-alpha.
22551 - Don't try to enable the sandbox when using the Tor binary to check
22552 its configuration, hash a passphrase, or so on. Doing so was
22553 crashing on startup for some users. Fixes bug 11609; bugfix
22555 - Avoid warnings when running with sandboxing and node statistics
22556 enabled at the same time. Fixes part of 12064; bugfix on
22557 0.2.5.1-alpha. Patch from Michael Wolf.
22558 - Avoid warnings when running with sandboxing enabled at the same
22559 time as cookie authentication, hidden services, or directory
22560 authority voting. Fixes part of 12064; bugfix on 0.2.5.1-alpha.
22561 - Do not allow options that require calls to exec to be enabled
22562 alongside the seccomp2 sandbox: they will inevitably crash. Fixes
22563 bug 12043; bugfix on 0.2.5.1-alpha.
22564 - Handle failures in getpwnam()/getpwuid() when running with the
22565 User option set and the Linux syscall sandbox enabled. Fixes bug
22566 11946; bugfix on 0.2.5.1-alpha.
22567 - Refactor the getaddrinfo workaround that the seccomp sandbox uses
22568 to avoid calling getaddrinfo() after installing the sandbox
22569 filters. Previously, it preloaded a cache with the IPv4 address
22570 for our hostname, and nothing else. Now, it loads the cache with
22571 every address that it used to initialize the Tor process. Fixes
22572 bug 11970; bugfix on 0.2.5.1-alpha.
22574 o Minor bugfixes (pluggable transports):
22575 - Enable the ExtORPortCookieAuthFile option, to allow changing the
22576 default location of the authentication token for the extended OR
22577 Port as used by sever-side pluggable transports. We had
22578 implemented this option before, but the code to make it settable
22579 had been omitted. Fixes bug 11635; bugfix on 0.2.5.1-alpha.
22580 - Avoid another 60-second delay when starting Tor in a pluggable-
22581 transport-using configuration when we already have cached
22582 descriptors for our bridges. Fixes bug 11965; bugfix
22585 o Minor bugfixes (client):
22586 - Avoid "Tried to open a socket with DisableNetwork set" warnings
22587 when starting a client with bridges configured and DisableNetwork
22588 set. (Tor launcher starts Tor with DisableNetwork set the first
22589 time it runs.) Fixes bug 10405; bugfix on 0.2.3.9-alpha.
22591 o Minor bugfixes (testing):
22592 - The Python parts of the test scripts now work on Python 3 as well
22593 as Python 2, so systems where '/usr/bin/python' is Python 3 will
22594 no longer have the tests break. Fixes bug 11608; bugfix
22596 - When looking for versions of python that we could run the tests
22597 with, check for "python2.7" and "python3.3"; previously we were
22598 only looking for "python", "python2", and "python3". Patch from
22599 Dana Koch. Fixes bug 11632; bugfix on 0.2.5.2-alpha.
22600 - Fix all valgrind warnings produced by the unit tests. There were
22601 over a thousand memory leak warnings previously, mostly produced
22602 by forgetting to free things in the unit test code. Fixes bug
22603 11618, bugfixes on many versions of Tor.
22605 o Minor bugfixes (tor-fw-helper):
22606 - Give a correct log message when tor-fw-helper fails to launch.
22607 (Previously, we would say something like "tor-fw-helper sent us a
22608 string we could not parse".) Fixes bug 9781; bugfix
22611 o Minor bugfixes (relay, threading):
22612 - Check return code on spawn_func() in cpuworker code, so that we
22613 don't think we've spawned a nonworking cpuworker and write junk to
22614 it forever. Fix related to bug 4345; bugfix on all released Tor
22615 versions. Found by "skruffy".
22616 - Use a pthread_attr to make sure that spawn_func() cannot return an
22617 error while at the same time launching a thread. Fix related to
22618 bug 4345; bugfix on all released Tor versions. Reported
22621 o Minor bugfixes (relay, oom prevention):
22622 - Correctly detect the total available system memory. We tried to do
22623 this in 0.2.5.4-alpha, but the code was set up to always return an
22624 error value, even on success. Fixes bug 11805; bugfix
22627 o Minor bugfixes (relay, other):
22628 - We now drop CREATE cells for already-existent circuit IDs and for
22629 zero-valued circuit IDs, regardless of other factors that might
22630 otherwise have called for DESTROY cells. Fixes bug 12191; bugfix
22632 - Avoid an illegal read from stack when initializing the TLS module
22633 using a version of OpenSSL without all of the ciphers used by the
22634 v2 link handshake. Fixes bug 12227; bugfix on 0.2.4.8-alpha. Found
22636 - When rejecting DATA cells for stream_id zero, still count them
22637 against the circuit's deliver window so that we don't fail to send
22638 a SENDME. Fixes bug 11246; bugfix on 0.2.4.10-alpha.
22640 o Minor bugfixes (logging):
22641 - Fix a misformatted log message about delayed directory fetches.
22642 Fixes bug 11654; bugfix on 0.2.5.3-alpha.
22643 - Squelch a spurious LD_BUG message "No origin circuit for
22644 successful SOCKS stream" in certain hidden service failure cases;
22648 - Include a tor.service file in contrib/dist for use with systemd.
22649 Some distributions will be able to use this file unmodified;
22650 others will need to tweak it, or write their own. Patch from Jamie
22651 Nguyen; resolves ticket 8368.
22654 - Clean up several option names in the manpage to match their real
22655 names, add the missing documentation for a couple of testing and
22656 directory authority options, remove the documentation for a
22657 V2-directory fetching option that no longer exists. Resolves
22659 - Correct the documentation so that it lists the correct directory
22660 for the stats files. (They are in a subdirectory called "stats",
22662 - In the manpage, move more authority-only options into the
22663 directory authority section so that operators of regular directory
22664 caches don't get confused.
22667 - The contrib directory has been sorted and tidied. Before, it was
22668 an unsorted dumping ground for useful and not-so-useful things.
22669 Now, it is divided based on functionality, and the items which
22670 seemed to be nonfunctional or useless have been removed. Resolves
22671 ticket 8966; based on patches from "rl1987".
22674 - Remove /tor/dbg-stability.txt URL that was meant to help debug WFU
22675 and MTBF calculations, but that nobody was using. Fixes ticket 11742.
22676 - The TunnelDirConns and PreferTunnelledDirConns options no longer
22677 exist; tunneled directory connections have been available since
22678 0.1.2.5-alpha, and turning them off is not a good idea. This is a
22679 brute-force fix for 10849, where "TunnelDirConns 0" would break
22683 Changes in version 0.2.4.22 - 2014-05-16
22684 Tor 0.2.4.22 backports numerous high-priority fixes from the Tor 0.2.5
22685 alpha release series. These include blocking all authority signing
22686 keys that may have been affected by the OpenSSL "heartbleed" bug,
22687 choosing a far more secure set of TLS ciphersuites by default, closing
22688 a couple of memory leaks that could be used to run a target relay out
22689 of RAM, and several others.
22691 o Major features (security, backport from 0.2.5.4-alpha):
22692 - Block authority signing keys that were used on authorities
22693 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
22694 don't have any evidence that these keys _were_ compromised; we're
22695 doing this to be prudent.) Resolves ticket 11464.
22697 o Major bugfixes (security, OOM):
22698 - Fix a memory leak that could occur if a microdescriptor parse
22699 fails during the tokenizing step. This bug could enable a memory
22700 exhaustion attack by directory servers. Fixes bug 11649; bugfix
22703 o Major bugfixes (TLS cipher selection, backport from 0.2.5.4-alpha):
22704 - The relay ciphersuite list is now generated automatically based on
22705 uniform criteria, and includes all OpenSSL ciphersuites with
22706 acceptable strength and forward secrecy. Previously, we had left
22707 some perfectly fine ciphersuites unsupported due to omission or
22708 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
22709 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
22710 - Relays now trust themselves to have a better view than clients of
22711 which TLS ciphersuites are better than others. (Thanks to bug
22712 11513, the relay list is now well-considered, whereas the client
22713 list has been chosen mainly for anti-fingerprinting purposes.)
22714 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
22715 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
22716 AES128. Resolves ticket 11528.
22717 - Clients now try to advertise the same list of ciphersuites as
22718 Firefox 28. This change enables selection of (fast) GCM
22719 ciphersuites, disables some strange old ciphers, and stops
22720 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
22721 Resolves ticket 11438.
22723 o Minor bugfixes (configuration, security):
22724 - When running a hidden service, do not allow TunneledDirConns 0:
22725 trying to set that option together with a hidden service would
22726 otherwise prevent the hidden service from running, and also make
22727 it publish its descriptors directly over HTTP. Fixes bug 10849;
22728 bugfix on 0.2.1.1-alpha.
22730 o Minor bugfixes (controller, backport from 0.2.5.4-alpha):
22731 - Avoid sending a garbage value to the controller when a circuit is
22732 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
22734 o Minor bugfixes (exit relay, backport from 0.2.5.4-alpha):
22735 - Stop leaking memory when we successfully resolve a PTR record.
22736 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
22738 o Minor bugfixes (bridge client, backport from 0.2.5.4-alpha):
22739 - Avoid 60-second delays in the bootstrapping process when Tor is
22740 launching for a second time while using bridges. Fixes bug 9229;
22741 bugfix on 0.2.0.3-alpha.
22743 o Minor bugfixes (relays and bridges, backport from 0.2.5.4-alpha):
22744 - Give the correct URL in the warning message when trying to run a
22745 relay on an ancient version of Windows. Fixes bug 9393.
22747 o Minor bugfixes (compilation):
22748 - Fix a compilation error when compiling with --disable-curve25519.
22749 Fixes bug 9700; bugfix on 0.2.4.17-rc.
22752 - Downgrade the warning severity for the the "md was still
22753 referenced 1 node(s)" warning. Tor 0.2.5.4-alpha has better code
22754 for trying to diagnose this bug, and the current warning in
22755 earlier versions of tor achieves nothing useful. Addresses warning
22758 o Minor features (log verbosity, backport from 0.2.5.4-alpha):
22759 - When we run out of usable circuit IDs on a channel, log only one
22760 warning for the whole channel, and describe how many circuits
22761 there were on the channel. Fixes part of ticket 11553.
22763 o Minor features (security, backport from 0.2.5.4-alpha):
22764 - Decrease the lower limit of MaxMemInCellQueues to 256 MBytes (but
22765 leave the default at 8GBytes), to better support Raspberry Pi
22766 users. Fixes bug 9686; bugfix on 0.2.4.14-alpha.
22768 o Documentation (backport from 0.2.5.4-alpha):
22769 - Correctly document that we search for a system torrc file before
22770 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
22774 Changes in version 0.2.5.4-alpha - 2014-04-25
22775 Tor 0.2.5.4-alpha includes several security and performance
22776 improvements for clients and relays, including blacklisting authority
22777 signing keys that were used while susceptible to the OpenSSL
22778 "heartbleed" bug, fixing two expensive functions on busy relays,
22779 improved TLS ciphersuite preference lists, support for run-time
22780 hardening on compilers that support AddressSanitizer, and more work on
22781 the Linux sandbox code.
22783 There are also several usability fixes for clients (especially clients
22784 that use bridges), two new TransPort protocols supported (one on
22785 OpenBSD, one on FreeBSD), and various other bugfixes.
22787 This release marks end-of-life for Tor 0.2.2.x; those Tor versions
22788 have accumulated many known flaws; everyone should upgrade.
22790 o Major features (security):
22791 - If you don't specify MaxMemInQueues yourself, Tor now tries to
22792 pick a good value based on your total system memory. Previously,
22793 the default was always 8 GB. You can still override the default by
22794 setting MaxMemInQueues yourself. Resolves ticket 11396.
22795 - Block authority signing keys that were used on authorities
22796 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
22797 don't have any evidence that these keys _were_ compromised; we're
22798 doing this to be prudent.) Resolves ticket 11464.
22800 o Major features (relay performance):
22801 - Speed up server-side lookups of rendezvous and introduction point
22802 circuits by using hashtables instead of linear searches. These
22803 functions previously accounted between 3 and 7% of CPU usage on
22804 some busy relays. Resolves ticket 9841.
22805 - Avoid wasting CPU when extending a circuit over a channel that is
22806 nearly out of circuit IDs. Previously, we would do a linear scan
22807 over possible circuit IDs before finding one or deciding that we
22808 had exhausted our possibilities. Now, we try at most 64 random
22809 circuit IDs before deciding that we probably won't succeed. Fixes
22810 a possible root cause of ticket 11553.
22812 o Major features (seccomp2 sandbox, Linux only):
22813 - The seccomp2 sandbox can now run a test network for multiple hours
22814 without crashing. The sandbox is still experimental, and more bugs
22815 will probably turn up. To try it, enable "Sandbox 1" on a Linux
22816 host. Resolves ticket 11351.
22817 - Strengthen sandbox code: the sandbox can now test the arguments
22818 for rename(), and blocks _sysctl() entirely. Resolves another part
22820 - When the sandbox blocks a system call, it now tries to log a stack
22821 trace before exiting. Resolves ticket 11465.
22823 o Major bugfixes (TLS cipher selection):
22824 - The relay ciphersuite list is now generated automatically based on
22825 uniform criteria, and includes all OpenSSL ciphersuites with
22826 acceptable strength and forward secrecy. Previously, we had left
22827 some perfectly fine ciphersuites unsupported due to omission or
22828 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
22829 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
22830 - Relays now trust themselves to have a better view than clients of
22831 which TLS ciphersuites are better than others. (Thanks to bug
22832 11513, the relay list is now well-considered, whereas the client
22833 list has been chosen mainly for anti-fingerprinting purposes.)
22834 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
22835 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
22836 AES128. Resolves ticket 11528.
22837 - Clients now try to advertise the same list of ciphersuites as
22838 Firefox 28. This change enables selection of (fast) GCM
22839 ciphersuites, disables some strange old ciphers, and stops
22840 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
22841 Resolves ticket 11438.
22843 o Major bugfixes (bridge client):
22844 - Avoid 60-second delays in the bootstrapping process when Tor is
22845 launching for a second time while using bridges. Fixes bug 9229;
22846 bugfix on 0.2.0.3-alpha.
22848 o Minor features (transparent proxy, *BSD):
22849 - Support FreeBSD's ipfw firewall interface for TransPort ports on
22850 FreeBSD. To enable it, set "TransProxyType ipfw". Resolves ticket
22851 10267; patch from "yurivict".
22852 - Support OpenBSD's divert-to rules with the pf firewall for
22853 transparent proxy ports. To enable it, set "TransProxyType
22854 pf-divert". This allows Tor to run a TransPort transparent proxy
22855 port on OpenBSD 4.4 or later without root privileges. See the
22856 pf.conf(5) manual page for information on configuring pf to use
22857 divert-to rules. Closes ticket 10896; patch from Dana Koch.
22859 o Minor features (security):
22860 - New --enable-expensive-hardening option to enable security
22861 hardening options that consume nontrivial amounts of CPU and
22862 memory. Right now, this includes AddressSanitizer and UbSan, which
22863 are supported in newer versions of GCC and Clang. Closes ticket
22866 o Minor features (log verbosity):
22867 - Demote the message that we give when a flushing connection times
22868 out for too long from NOTICE to INFO. It was usually meaningless.
22869 Resolves ticket 5286.
22870 - Don't log so many notice-level bootstrapping messages at startup
22871 about downloading descriptors. Previously, we'd log a notice
22872 whenever we learned about more routers. Now, we only log a notice
22873 at every 5% of progress. Fixes bug 9963.
22874 - Warn less verbosely when receiving a malformed
22875 ESTABLISH_RENDEZVOUS cell. Fixes ticket 11279.
22876 - When we run out of usable circuit IDs on a channel, log only one
22877 warning for the whole channel, and describe how many circuits
22878 there were on the channel. Fixes part of ticket 11553.
22880 o Minor features (relay):
22881 - If a circuit timed out for at least 3 minutes, check if we have a
22882 new external IP address, and publish a new descriptor with the new
22883 IP address if it changed. Resolves ticket 2454.
22885 o Minor features (controller):
22886 - Make the entire exit policy available from the control port via
22887 GETINFO exit-policy/*. Implements enhancement 7952. Patch from
22889 - Because of the fix for ticket 11396, the real limit for memory
22890 usage may no longer match the configured MaxMemInQueues value. The
22891 real limit is now exposed via GETINFO limits/max-mem-in-queues.
22893 o Minor features (bridge client):
22894 - Report a more useful failure message when we can't connect to a
22895 bridge because we don't have the right pluggable transport
22896 configured. Resolves ticket 9665. Patch from Fábio J. Bertinatto.
22898 o Minor features (diagnostic):
22899 - Add more log messages to diagnose bug 7164, which causes
22900 intermittent "microdesc_free() called but md was still referenced"
22901 warnings. We now include more information, to figure out why we
22902 might be cleaning a microdescriptor for being too old if it's
22903 still referenced by a live node_t object.
22905 o Minor bugfixes (client, DNSPort):
22906 - When using DNSPort, try to respond to AAAA requests with AAAA
22907 answers. Previously, we hadn't looked at the request type when
22908 deciding which answer type to prefer. Fixes bug 10468; bugfix on
22910 - When receiving a DNS query for an unsupported record type, reply
22911 with no answer rather than with a NOTIMPL error. This behavior
22912 isn't correct either, but it will break fewer client programs, we
22913 hope. Fixes bug 10268; bugfix on 0.2.0.1-alpha. Original patch
22916 o Minor bugfixes (exit relay):
22917 - Stop leaking memory when we successfully resolve a PTR record.
22918 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
22920 o Minor bugfixes (bridge client):
22921 - Stop accepting bridge lines containing hostnames. Doing so would
22922 cause clients to perform DNS requests on the hostnames, which was
22923 not sensible behavior. Fixes bug 10801; bugfix on 0.2.0.1-alpha.
22924 - Avoid a 60-second delay in the bootstrapping process when a Tor
22925 client with pluggable transports re-reads its configuration at
22926 just the wrong time. Re-fixes bug 11156; bugfix on 0.2.5.3-alpha.
22928 o Minor bugfixes (client, logging during bootstrap):
22929 - Warn only once if we start logging in an unsafe way. Previously,
22930 we complain as many times as we had problems. Fixes bug 9870;
22931 bugfix on 0.2.5.1-alpha.
22932 - Only report the first fatal bootstrap error on a given OR
22933 connection. This stops us from telling the controller bogus error
22934 messages like "DONE". Fixes bug 10431; bugfix on 0.2.1.1-alpha.
22935 - Be more helpful when trying to run sandboxed on Linux without
22936 libseccomp. Instead of saying "Sandbox is not implemented on this
22937 platform", we now explain that we need to be built with
22938 libseccomp. Fixes bug 11543; bugfix on 0.2.5.1-alpha.
22939 - Avoid generating spurious warnings when starting with
22940 DisableNetwork enabled. Fixes bug 11200 and bug 10405; bugfix on
22943 o Minor bugfixes (closing OR connections):
22944 - If write_to_buf() in connection_write_to_buf_impl_() ever fails,
22945 check if it's an or_connection_t and correctly call
22946 connection_or_close_for_error() rather than
22947 connection_mark_for_close() directly. Fixes bug 11304; bugfix on
22949 - When closing all connections on setting DisableNetwork to 1, use
22950 connection_or_close_normally() rather than closing OR connections
22951 out from under the channel layer. Fixes bug 11306; bugfix on
22954 o Minor bugfixes (controller):
22955 - Avoid sending a garbage value to the controller when a circuit is
22956 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
22958 o Minor bugfixes (tor-fw-helper):
22959 - Allow tor-fw-helper to build again by adding src/ext to its
22960 CPPFLAGS. Fixes bug 11296; bugfix on 0.2.5.3-alpha.
22962 o Minor bugfixes (bridges):
22963 - Avoid potential crashes or bad behavior when launching a
22964 server-side managed proxy with ORPort or ExtORPort temporarily
22965 disabled. Fixes bug 9650; bugfix on 0.2.3.16-alpha.
22967 o Minor bugfixes (platform-specific):
22968 - Fix compilation on Solaris, which does not have <endian.h>. Fixes
22969 bug 11426; bugfix on 0.2.5.3-alpha.
22970 - When dumping a malformed directory object to disk, save it in
22971 binary mode on Windows, not text mode. Fixes bug 11342; bugfix on
22973 - Don't report failures from make_socket_reuseable() on incoming
22974 sockets on OSX: this can happen when incoming connections close
22975 early. Fixes bug 10081.
22977 o Minor bugfixes (trivial memory leaks):
22978 - Fix a small memory leak when signing a directory object. Fixes bug
22979 11275; bugfix on 0.2.4.13-alpha.
22980 - Free placeholder entries in our circuit table at exit; fixes a
22981 harmless memory leak. Fixes bug 11278; bugfix on 0.2.5.1-alpha.
22982 - Don't re-initialize a second set of OpenSSL mutexes when starting
22983 up. Previously, we'd make one set of mutexes, and then immediately
22984 replace them with another. Fixes bug 11726; bugfix on
22986 - Resolve some memory leaks found by coverity in the unit tests, on
22987 exit in tor-gencert, and on a failure to compute digests for our
22988 own keys when generating a v3 networkstatus vote. These leaks
22989 should never have affected anyone in practice.
22991 o Minor bugfixes (hidden service):
22992 - Only retry attempts to connect to a chosen rendezvous point 8
22993 times, not 30. Fixes bug 4241; bugfix on 0.1.0.1-rc.
22995 o Minor bugfixes (misc code correctness):
22996 - Fix various instances of undefined behavior in channeltls.c,
22997 tor_memmem(), and eventdns.c that would cause us to construct
22998 pointers to memory outside an allocated object. (These invalid
22999 pointers were not accessed, but C does not even allow them to
23000 exist.) Fixes bug 10363; bugfixes on 0.1.1.1-alpha, 0.1.2.1-alpha,
23001 0.2.0.10-alpha, and 0.2.3.6-alpha. Reported by "bobnomnom".
23002 - Use the AddressSanitizer and Ubsan sanitizers (in clang-3.4) to
23003 fix some miscellaneous errors in our tests and codebase. Fixes bug
23004 11232. Bugfixes on versions back as far as 0.2.1.11-alpha.
23005 - Always check return values for unlink, munmap, UnmapViewOfFile;
23006 check strftime return values more often. In some cases all we can
23007 do is report a warning, but this may help prevent deeper bugs from
23008 going unnoticed. Closes ticket 8787; bugfixes on many, many tor
23010 - Fix numerous warnings from the clang "scan-build" static analyzer.
23011 Some of these are programming style issues; some of them are false
23012 positives that indicated awkward code; some are undefined behavior
23013 cases related to constructing (but not using) invalid pointers;
23014 some are assumptions about API behavior; some are (harmlessly)
23015 logging sizeof(ptr) bytes from a token when sizeof(*ptr) would be
23016 correct; and one or two are genuine bugs that weren't reachable
23017 from the rest of the program. Fixes bug 8793; bugfixes on many,
23021 - Build the torify.1 manpage again. Previously, we were only trying
23022 to build it when also building tor-fw-helper. That's why we didn't
23023 notice that we'd broken the ability to build it. Fixes bug 11321;
23024 bugfix on 0.2.5.1-alpha.
23025 - Fix the layout of the SOCKSPort flags in the manpage. Fixes bug
23026 11061; bugfix on 0.2.4.7-alpha.
23027 - Correctly document that we search for a system torrc file before
23028 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
23030 - Resolve warnings from Doxygen.
23032 o Code simplifications and refactoring:
23033 - Remove is_internal_IP() function. Resolves ticket 4645.
23034 - Remove unused function circuit_dump_by_chan from circuitlist.c.
23035 Closes issue 9107; patch from "marek".
23036 - Change our use of the ENUM_BF macro to avoid declarations that
23039 o Deprecated versions:
23040 - Tor 0.2.2.x has reached end-of-life; it has received no patches or
23041 attention for some while. Directory authorities no longer accept
23042 descriptors from relays running any version of Tor prior to Tor
23043 0.2.3.16-alpha. Resolves ticket 11149.
23046 - New macros in test.h to simplify writing mock-functions for unit
23047 tests. Part of ticket 11507. Patch from Dana Koch.
23048 - Complete tests for the status.c module. Resolves ticket 11507.
23049 Patch from Dana Koch.
23052 - Remove all code for the long unused v1 directory protocol.
23053 Resolves ticket 11070.
23056 Changes in version 0.2.5.3-alpha - 2014-03-22
23057 Tor 0.2.5.3-alpha includes all the fixes from 0.2.4.21. It contains
23058 two new anti-DoS features for Tor relays, resolves a bug that kept
23059 SOCKS5 support for IPv6 from working, fixes several annoying usability
23060 issues for bridge users, and removes more old code for unused
23063 The Tor 0.2.5.x release series is now in patch-freeze: no feature
23064 patches not already written will be considered for inclusion in 0.2.5.x.
23066 o Major features (relay security, DoS-resistance):
23067 - When deciding whether we have run out of memory and we need to
23068 close circuits, also consider memory allocated in buffers for
23069 streams attached to each circuit.
23071 This change, which extends an anti-DoS feature introduced in
23072 0.2.4.13-alpha and improved in 0.2.4.14-alpha, lets Tor exit relays
23073 better resist more memory-based DoS attacks than before. Since the
23074 MaxMemInCellQueues option now applies to all queues, it is renamed
23075 to MaxMemInQueues. This feature fixes bug 10169.
23076 - Avoid hash-flooding denial-of-service attacks by using the secure
23077 SipHash-2-4 hash function for our hashtables. Without this
23078 feature, an attacker could degrade performance of a targeted
23079 client or server by flooding their data structures with a large
23080 number of entries to be stored at the same hash table position,
23081 thereby slowing down the Tor instance. With this feature, hash
23082 table positions are derived from a randomized cryptographic key,
23083 and an attacker cannot predict which entries will collide. Closes
23085 - Decrease the lower limit of MaxMemInQueues to 256 MBytes (but leave
23086 the default at 8GBytes), to better support Raspberry Pi users. Fixes
23087 bug 9686; bugfix on 0.2.4.14-alpha.
23089 o Minor features (bridges, pluggable transports):
23090 - Bridges now write the SHA1 digest of their identity key
23091 fingerprint (that is, a hash of a hash of their public key) to
23092 notice-level logs, and to a new hashed-fingerprint file. This
23093 information will help bridge operators look up their bridge in
23094 Globe and similar tools. Resolves ticket 10884.
23095 - Improve the message that Tor displays when running as a bridge
23096 using pluggable transports without an Extended ORPort listener.
23097 Also, log the message in the log file too. Resolves ticket 11043.
23099 o Minor features (other):
23100 - Add a new option, PredictedPortsRelevanceTime, to control how long
23101 after having received a request to connect to a given port Tor
23102 will try to keep circuits ready in anticipation of future requests
23103 for that port. Patch from "unixninja92"; implements ticket 9176.
23104 - Generate a warning if any ports are listed in the SocksPolicy,
23105 DirPolicy, AuthDirReject, AuthDirInvalid, AuthDirBadDir, or
23106 AuthDirBadExit options. (These options only support address
23107 ranges.) Fixes part of ticket 11108.
23108 - Update geoip and geoip6 to the February 7 2014 Maxmind GeoLite2
23111 o Minor bugfixes (new since 0.2.5.2-alpha, also in 0.2.4.21):
23112 - Build without warnings under clang 3.4. (We have some macros that
23113 define static functions only some of which will get used later in
23114 the module. Starting with clang 3.4, these give a warning unless the
23115 unused attribute is set on them.) Resolves ticket 10904.
23116 - Fix build warnings about missing "a2x" comment when building the
23117 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
23118 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
23120 o Minor bugfixes (client):
23121 - Improve the log message when we can't connect to a hidden service
23122 because all of the hidden service directory nodes hosting its
23123 descriptor are excluded. Improves on our fix for bug 10722, which
23124 was a bugfix on 0.2.0.10-alpha.
23125 - Raise a control port warning when we fail to connect to all of
23126 our bridges. Previously, we didn't inform the controller, and
23127 the bootstrap process would stall. Fixes bug 11069; bugfix on
23129 - Exit immediately when a process-owning controller exits.
23130 Previously, tor relays would wait for a little while after their
23131 controller exited, as if they had gotten an INT signal -- but this
23132 was problematic, since there was no feedback for the user. To do a
23133 clean shutdown, controllers should send an INT signal and give Tor
23134 a chance to clean up. Fixes bug 10449; bugfix on 0.2.2.28-beta.
23135 - Stop attempting to connect to bridges before our pluggable
23136 transports are configured (harmless but resulted in some erroneous
23137 log messages). Fixes bug 11156; bugfix on 0.2.3.2-alpha.
23138 - Fix connections to IPv6 addresses over SOCKS5. Previously, we were
23139 generating incorrect SOCKS5 responses, and confusing client
23140 applications. Fixes bug 10987; bugfix on 0.2.4.7-alpha.
23142 o Minor bugfixes (relays and bridges):
23143 - Avoid crashing on a malformed resolv.conf file when running a
23144 relay using Libevent 1. Fixes bug 8788; bugfix on 0.1.1.23.
23145 - Non-exit relays no longer launch mock DNS requests to check for
23146 DNS hijacking. This has been unnecessary since 0.2.1.7-alpha, when
23147 non-exit relays stopped servicing DNS requests. Fixes bug 965;
23148 bugfix on 0.2.1.7-alpha. Patch from Matt Pagan.
23149 - Bridges now report complete directory request statistics. Related
23150 to bug 5824; bugfix on 0.2.2.1-alpha.
23151 - Bridges now never collect statistics that were designed for
23152 relays. Fixes bug 5824; bugfix on 0.2.3.8-alpha.
23153 - Stop giving annoying warning messages when we decide not to launch
23154 a pluggable transport proxy that we don't need (because there are
23155 no bridges configured to use it). Resolves ticket 5018; bugfix
23157 - Give the correct URL in the warning message when trying to run a
23158 relay on an ancient version of Windows. Fixes bug 9393.
23160 o Minor bugfixes (backtrace support):
23161 - Support automatic backtraces on more platforms by using the
23162 "-fasynchronous-unwind-tables" compiler option. This option is
23163 needed for platforms like 32-bit Intel where "-fomit-frame-pointer"
23164 is on by default and table generation is not. This doesn't yet
23165 add Windows support; only Linux, OSX, and some BSDs are affected.
23166 Reported by 'cypherpunks'; fixes bug 11047; bugfix on 0.2.5.2-alpha.
23167 - Avoid strange behavior if two threads hit failed assertions at the
23168 same time and both try to log backtraces at once. (Previously, if
23169 this had happened, both threads would have stored their intermediate
23170 results in the same buffer, and generated junk outputs.) Reported by
23171 "cypherpunks". Fixes bug 11048; bugfix on 0.2.5.2-alpha.
23172 - Fix a compiler warning in format_number_sigsafe(). Bugfix on
23173 0.2.5.2-alpha; patch from Nick Hopper.
23175 o Minor bugfixes (unit tests):
23176 - Fix a small bug in the unit tests that might have made the tests
23177 call 'chmod' with an uninitialized bitmask. Fixes bug 10928;
23178 bugfix on 0.2.5.1-alpha. Patch from Dana Koch.
23181 - Remove all remaining code related to version-0 hidden service
23182 descriptors: they have not been in use since 0.2.2.1-alpha. Fixes
23183 the rest of bug 10841.
23186 - Document in the manpage that "KBytes" may also be written as
23187 "kilobytes" or "KB", that "Kbits" may also be written as
23188 "kilobits", and so forth. Closes ticket 9222.
23189 - Document that the ClientOnly config option overrides ORPort.
23190 Our old explanation made ClientOnly sound as though it did
23191 nothing at all. Resolves bug 9059.
23192 - Explain that SocksPolicy, DirPolicy, and similar options don't
23193 take port arguments. Fixes the other part of ticket 11108.
23194 - Fix a comment about the rend_server_descriptor_t.protocols field
23195 to more accurately describe its range. Also, make that field
23196 unsigned, to more accurately reflect its usage. Fixes bug 9099;
23197 bugfix on 0.2.1.5-alpha.
23198 - Fix the manpage's description of HiddenServiceAuthorizeClient:
23199 the maximum client name length is 16, not 19. Fixes bug 11118;
23200 bugfix on 0.2.1.6-alpha.
23202 o Code simplifications and refactoring:
23203 - Get rid of router->address, since in all cases it was just the
23204 string representation of router->addr. Resolves ticket 5528.
23206 o Test infrastructure:
23207 - Update to the latest version of tinytest.
23208 - Improve the tinytest implementation of string operation tests so
23209 that comparisons with NULL strings no longer crash the tests; they
23210 now just fail, normally. Fixes bug 9004; bugfix on 0.2.2.4-alpha.
23213 Changes in version 0.2.4.21 - 2014-02-28
23214 Tor 0.2.4.21 further improves security against potential adversaries who
23215 find breaking 1024-bit crypto doable, and backports several stability
23216 and robustness patches from the 0.2.5 branch.
23218 o Major features (client security):
23219 - When we choose a path for a 3-hop circuit, make sure it contains
23220 at least one relay that supports the NTor circuit extension
23221 handshake. Otherwise, there is a chance that we're building
23222 a circuit that's worth attacking by an adversary who finds
23223 breaking 1024-bit crypto doable, and that chance changes the game
23224 theory. Implements ticket 9777.
23227 - Do not treat streams that fail with reason
23228 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
23229 since it could also indicate an ENETUNREACH connection error. Fixes
23230 part of bug 10777; bugfix on 0.2.4.8-alpha.
23232 o Code simplification and refactoring:
23233 - Remove data structures which were introduced to implement the
23234 CellStatistics option: they are now redundant with the new timestamp
23235 field in the regular packed_cell_t data structure, which we did
23236 in 0.2.4.18-rc in order to resolve bug 9093. Resolves ticket 10870.
23239 - Always clear OpenSSL bignums before freeing them -- even bignums
23240 that don't contain secrets. Resolves ticket 10793. Patch by
23242 - Build without warnings under clang 3.4. (We have some macros that
23243 define static functions only some of which will get used later in
23244 the module. Starting with clang 3.4, these give a warning unless the
23245 unused attribute is set on them.) Resolves ticket 10904.
23246 - Update geoip and geoip6 files to the February 7 2014 Maxmind
23247 GeoLite2 Country database.
23250 - Set the listen() backlog limit to the largest actually supported
23251 on the system, not to the value in a header file. Fixes bug 9716;
23252 bugfix on every released Tor.
23253 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
23254 exit node as a NOROUTE error, not an INTERNAL error, since they
23255 can apparently happen when trying to connect to the wrong sort
23256 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
23257 - Fix build warnings about missing "a2x" comment when building the
23258 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
23259 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
23260 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
23261 not entirely remove it from the connection lists. Fixes bug 9602;
23262 bugfix on 0.2.4.4-alpha.
23263 - Fix a segmentation fault in our benchmark code when running with
23264 Fedora's OpenSSL package, or any other OpenSSL that provides
23265 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
23266 - Turn "circuit handshake stats since last time" log messages into a
23267 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
23269 o Documentation fixes:
23270 - Document that all but one DirPort entry must have the NoAdvertise
23271 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
23274 Changes in version 0.2.5.2-alpha - 2014-02-13
23275 Tor 0.2.5.2-alpha includes all the fixes from 0.2.4.18-rc and 0.2.4.20,
23276 like the "poor random number generation" fix and the "building too many
23277 circuits" fix. It also further improves security against potential
23278 adversaries who find breaking 1024-bit crypto doable, and launches
23279 pluggable transports on demand (which gets us closer to integrating
23280 pluggable transport support by default -- not to be confused with Tor
23281 bundles enabling pluggable transports and bridges by default).
23283 o Major features (client security):
23284 - When we choose a path for a 3-hop circuit, make sure it contains
23285 at least one relay that supports the NTor circuit extension
23286 handshake. Otherwise, there is a chance that we're building
23287 a circuit that's worth attacking by an adversary who finds
23288 breaking 1024-bit crypto doable, and that chance changes the game
23289 theory. Implements ticket 9777.
23290 - Clients now look at the "usecreatefast" consensus parameter to
23291 decide whether to use CREATE_FAST or CREATE cells for the first hop
23292 of their circuit. This approach can improve security on connections
23293 where Tor's circuit handshake is stronger than the available TLS
23294 connection security levels, but the tradeoff is more computational
23295 load on guard relays. Implements proposal 221. Resolves ticket 9386.
23297 o Major features (bridges):
23298 - Don't launch pluggable transport proxies if we don't have any
23299 bridges configured that would use them. Now we can list many
23300 pluggable transports, and Tor will dynamically start one when it
23301 hears a bridge address that needs it. Resolves ticket 5018.
23302 - The bridge directory authority now assigns status flags (Stable,
23303 Guard, etc) to bridges based on thresholds calculated over all
23304 Running bridges. Now bridgedb can finally make use of its features
23305 to e.g. include at least one Stable bridge in its answers. Fixes
23308 o Major features (other):
23309 - Extend ORCONN controller event to include an "ID" parameter,
23310 and add four new controller event types CONN_BW, CIRC_BW,
23311 CELL_STATS, and TB_EMPTY that show connection and circuit usage.
23312 The new events are emitted in private Tor networks only, with the
23313 goal of being able to better track performance and load during
23314 full-network simulations. Implements proposal 218 and ticket 7359.
23315 - On some platforms (currently: recent OSX versions, glibc-based
23316 platforms that support the ELF format, and a few other
23317 Unix-like operating systems), Tor can now dump stack traces
23318 when a crash occurs or an assertion fails. By default, traces
23319 are dumped to stderr (if possible) and to any logs that are
23320 reporting errors. Implements ticket 9299.
23323 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
23324 not entirely remove it from the connection lists. Fixes bug 9602;
23325 bugfix on 0.2.4.4-alpha.
23326 - Do not treat streams that fail with reason
23327 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
23328 since it could also indicate an ENETUNREACH connection error. Fixes
23329 part of bug 10777; bugfix on 0.2.4.8-alpha.
23331 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
23332 - Do not allow OpenSSL engines to replace the PRNG, even when
23333 HardwareAccel is set. The only default builtin PRNG engine uses
23334 the Intel RDRAND instruction to replace the entire PRNG, and
23335 ignores all attempts to seed it with more entropy. That's
23336 cryptographically stupid: the right response to a new alleged
23337 entropy source is never to discard all previously used entropy
23338 sources. Fixes bug 10402; works around behavior introduced in
23339 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
23341 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
23342 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
23343 - Avoid launching spurious extra circuits when a stream is pending.
23344 This fixes a bug where any circuit that _wasn't_ unusable for new
23345 streams would be treated as if it were, causing extra circuits to
23346 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
23348 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23349 - No longer stop reading or writing on cpuworker connections when
23350 our rate limiting buckets go empty. Now we should handle circuit
23351 handshake requests more promptly. Resolves bug 9731.
23352 - Stop trying to bootstrap all our directory information from
23353 only our first guard. Discovered while fixing bug 9946; bugfix
23356 o Minor features (bridges, pluggable transports):
23357 - Add threshold cutoffs to the networkstatus document created by
23358 the Bridge Authority. Fixes bug 1117.
23359 - On Windows, spawn background processes using the CREATE_NO_WINDOW
23360 flag. Now Tor Browser Bundle 3.5 with pluggable transports enabled
23361 doesn't pop up a blank console window. (In Tor Browser Bundle 2.x,
23362 Vidalia set this option for us.) Implements ticket 10297.
23364 o Minor features (security):
23365 - Always clear OpenSSL bignums before freeing them -- even bignums
23366 that don't contain secrets. Resolves ticket 10793. Patch by
23369 o Minor features (config options and command line):
23370 - Add an --allow-missing-torrc commandline option that tells Tor to
23371 run even if the configuration file specified by -f is not available.
23372 Implements ticket 10060.
23373 - Add support for the TPROXY transparent proxying facility on Linux.
23374 See documentation for the new TransProxyType option for more
23375 details. Implementation by "thomo". Closes ticket 10582.
23377 o Minor features (controller):
23378 - Add a new "HS_DESC" controller event that reports activities
23379 related to hidden service descriptors. Resolves ticket 8510.
23380 - New "DROPGUARDS" controller command to forget all current entry
23381 guards. Not recommended for ordinary use, since replacing guards
23382 too frequently makes several attacks easier. Resolves ticket 9934;
23385 o Minor features (build):
23386 - Assume that a user using ./configure --host wants to cross-compile,
23387 and give an error if we cannot find a properly named
23388 tool-chain. Add a --disable-tool-name-check option to proceed
23389 nevertheless. Addresses ticket 9869. Patch by Benedikt Gollatz.
23390 - If we run ./configure and the compiler recognizes -fstack-protector
23391 but the linker rejects it, warn the user about a potentially missing
23392 libssp package. Addresses ticket 9948. Patch from Benedikt Gollatz.
23394 o Minor features (testing):
23395 - If Python is installed, "make check" now runs extra tests beyond
23396 the unit test scripts.
23397 - When bootstrapping a test network, sometimes very few relays get
23398 the Guard flag. Now a new option "TestingDirAuthVoteGuard" can
23399 specify a set of relays which should be voted Guard regardless of
23400 their uptime or bandwidth. Addresses ticket 9206.
23402 o Minor features (log messages):
23403 - When ServerTransportPlugin is set on a bridge, Tor can write more
23404 useful statistics about bridge use in its extrainfo descriptors,
23405 but only if the Extended ORPort ("ExtORPort") is set too. Add a
23406 log message to inform the user in this case. Resolves ticket 9651.
23407 - When receiving a new controller connection, log the origin address.
23408 Resolves ticket 9698; patch from "sigpipe".
23409 - When logging OpenSSL engine status at startup, log the status of
23410 more engines. Fixes ticket 10043; patch from Joshua Datko.
23411 - Turn "circuit handshake stats since last time" log messages into a
23412 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
23414 o Minor features (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23415 - Improve the circuit queue out-of-memory handler. Previously, when
23416 we ran low on memory, we'd close whichever circuits had the most
23417 queued cells. Now, we close those that have the *oldest* queued
23418 cells, on the theory that those are most responsible for us
23419 running low on memory. Based on analysis from a forthcoming paper
23420 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
23421 - Generate bootstrapping status update events correctly when fetching
23422 microdescriptors. Fixes bug 9927.
23423 - Update to the October 2 2013 Maxmind GeoLite Country database.
23425 o Minor bugfixes (clients):
23426 - When closing a channel that has already been open, do not close
23427 pending circuits that were waiting to connect to the same relay.
23428 Fixes bug 9880; bugfix on 0.2.5.1-alpha. Thanks to skruffy for
23431 o Minor bugfixes (relays):
23432 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
23433 exit node as a NOROUTE error, not an INTERNAL error, since they
23434 can apparently happen when trying to connect to the wrong sort
23435 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
23437 o Minor bugfixes (bridges):
23438 - Fix a bug where the first connection works to a bridge that uses a
23439 pluggable transport with client-side parameters, but we don't send
23440 the client-side parameters on subsequent connections. (We don't
23441 use any pluggable transports with client-side parameters yet,
23442 but ScrambleSuit will soon become the first one.) Fixes bug 9162;
23443 bugfix on 0.2.0.3-alpha. Based on a patch from "rl1987".
23445 o Minor bugfixes (node selection):
23446 - If ExcludeNodes is set, consider non-excluded hidden service
23447 directory servers before excluded ones. Do not consider excluded
23448 hidden service directory servers at all if StrictNodes is
23449 set. (Previously, we would sometimes decide to connect to those
23450 servers, and then realize before we initiated a connection that
23451 we had excluded them.) Fixes bug 10722; bugfix on 0.2.0.10-alpha.
23452 Reported by "mr-4".
23453 - If we set the ExitNodes option but it doesn't include any nodes
23454 that have the Exit flag, we would choose not to bootstrap. Now we
23455 bootstrap so long as ExitNodes includes nodes which can exit to
23456 some port. Fixes bug 10543; bugfix on 0.2.4.10-alpha.
23458 o Minor bugfixes (controller and command-line):
23459 - If changing a config option via "setconf" fails in a recoverable
23460 way, we used to nonetheless write our new control ports to the
23461 file described by the "ControlPortWriteToFile" option. Now we only
23462 write out that file if we successfully switch to the new config
23463 option. Fixes bug 5605; bugfix on 0.2.2.26-beta. Patch from "Ryman".
23464 - When a command-line option such as --version or --help that
23465 ordinarily implies --hush appears on the command line along with
23466 --quiet, then actually obey --quiet. Previously, we obeyed --quiet
23467 only if it appeared later on the command line. Fixes bug 9578;
23468 bugfix on 0.2.5.1-alpha.
23470 o Minor bugfixes (code correctness):
23471 - Previously we used two temporary files when writing descriptors to
23472 disk; now we only use one. Fixes bug 1376.
23473 - Remove an erroneous (but impossible and thus harmless) pointer
23474 comparison that would have allowed compilers to skip a bounds
23475 check in channeltls.c. Fixes bugs 10313 and 9980; bugfix on
23476 0.2.0.10-alpha. Noticed by Jared L Wong and David Fifield.
23477 - Fix an always-true assertion in pluggable transports code so it
23478 actually checks what it was trying to check. Fixes bug 10046;
23479 bugfix on 0.2.3.9-alpha. Found by "dcb".
23481 o Minor bugfixes (protocol correctness):
23482 - When receiving a VERSIONS cell with an odd number of bytes, close
23483 the connection immediately since the cell is malformed. Fixes bug
23484 10365; bugfix on 0.2.0.10-alpha. Spotted by "bobnomnom"; fix by
23487 o Minor bugfixes (build):
23488 - Restore the ability to compile Tor with V2_HANDSHAKE_SERVER
23489 turned off (that is, without support for v2 link handshakes). Fixes
23490 bug 4677; bugfix on 0.2.3.2-alpha. Patch from "piet".
23491 - Fix compilation warnings and startup issues when running with
23492 "Sandbox 1" and libseccomp-2.1.0. Fixes bug 10563; bugfix on
23494 - Fix compilation on Solaris 9, which didn't like us having an
23495 identifier named "sun". Fixes bug 10565; bugfix in 0.2.5.1-alpha.
23497 o Minor bugfixes (testing):
23498 - Fix a segmentation fault in our benchmark code when running with
23499 Fedora's OpenSSL package, or any other OpenSSL that provides
23500 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
23502 o Minor bugfixes (log messages):
23503 - Fix a bug where clients using bridges would report themselves
23504 as 50% bootstrapped even without a live consensus document.
23505 Fixes bug 9922; bugfix on 0.2.1.1-alpha.
23506 - Suppress a warning where, if there's only one directory authority
23507 in the network, we would complain that votes and signatures cannot
23508 be uploaded to other directory authorities. Fixes bug 10842;
23509 bugfix on 0.2.2.26-beta.
23510 - Report bootstrapping progress correctly when we're downloading
23511 microdescriptors. We had updated our "do we have enough microdescs
23512 to begin building circuits?" logic most recently in 0.2.4.10-alpha
23513 (see bug 5956), but we left the bootstrap status event logic at
23514 "how far through getting 1/4 of them are we?" Fixes bug 9958;
23515 bugfix on 0.2.2.36, which is where they diverged (see bug 5343).
23517 o Minor bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
23518 - Avoid a crash bug when starting with a corrupted microdescriptor
23519 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
23520 - If we fail to dump a previously cached microdescriptor to disk, avoid
23521 freeing duplicate data later on. Fixes bug 10423; bugfix on
23522 0.2.4.13-alpha. Spotted by "bobnomnom".
23524 o Minor bugfixes on 0.2.4.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23525 - Correctly log long IPv6 exit policies, instead of truncating them
23526 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
23527 - Our default TLS ecdhe groups were backwards: we meant to be using
23528 P224 for relays (for performance win) and P256 for bridges (since
23529 it is more common in the wild). Instead we had it backwards. After
23530 reconsideration, we decided that the default should be P256 on all
23531 hosts, since its security is probably better, and since P224 is
23532 reportedly used quite little in the wild. Found by "skruffy" on
23533 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
23534 - Free directory authority certificate download statuses on exit
23535 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
23537 o Minor bugfixes on 0.2.3.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23538 - If the guard we choose first doesn't answer, we would try the
23539 second guard, but once we connected to the second guard we would
23540 abandon it and retry the first one, slowing down bootstrapping.
23541 The fix is to treat all our initially chosen guards as acceptable
23542 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
23543 - Fix an assertion failure that would occur when disabling the
23544 ORPort setting on a running Tor process while accounting was
23545 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
23546 - When examining the list of network interfaces to find our address,
23547 do not consider non-running or disabled network interfaces. Fixes
23548 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
23549 - Avoid an off-by-one error when checking buffer boundaries when
23550 formatting the exit status of a pluggable transport helper.
23551 This is probably not an exploitable bug, but better safe than
23552 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
23555 o Removed code and features:
23556 - Clients now reject any directory authority certificates lacking
23557 a dir-key-crosscert element. These have been included since
23558 0.2.1.9-alpha, so there's no real reason for them to be optional
23559 any longer. Completes proposal 157. Resolves ticket 10162.
23560 - Remove all code that existed to support the v2 directory system,
23561 since there are no longer any v2 directory authorities. Resolves
23563 - Remove the HSAuthoritativeDir and AlternateHSAuthority torrc
23564 options, which were used for designating authorities as "Hidden
23565 service authorities". There has been no use of hidden service
23566 authorities since 0.2.2.1-alpha, when we stopped uploading or
23567 downloading v0 hidden service descriptors. Fixes bug 10881; also
23568 part of a fix for bug 10841.
23570 o Code simplification and refactoring:
23571 - Remove some old fallback code designed to keep Tor clients working
23572 in a network with only two working relays. Elsewhere in the code we
23573 have long since stopped supporting such networks, so there wasn't
23574 much point in keeping it around. Addresses ticket 9926.
23575 - Reject 0-length EXTEND2 cells more explicitly. Fixes bug 10536;
23576 bugfix on 0.2.4.8-alpha. Reported by "cypherpunks".
23577 - Remove data structures which were introduced to implement the
23578 CellStatistics option: they are now redundant with the addition
23579 of a timestamp to the regular packed_cell_t data structure, which
23580 we did in 0.2.4.18-rc in order to resolve ticket 9093. Implements
23583 o Documentation (man page) fixes:
23584 - Update manpage to describe some of the files you can expect to
23585 find in Tor's DataDirectory. Addresses ticket 9839.
23586 - Document that all but one DirPort entry must have the NoAdvertise
23587 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
23589 o Documentation fixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23590 - Clarify the usage and risks of setting the ContactInfo torrc line
23591 for your relay or bridge. Resolves ticket 9854.
23592 - Add anchors to the manpage so we can link to the html version of
23593 the documentation for specific options. Resolves ticket 9866.
23594 - Replace remaining references to DirServer in man page and
23595 log entries. Resolves ticket 10124.
23598 - Make the "tor-gencert" tool used by directory authority operators
23599 create 2048-bit signing keys by default (rather than 1024-bit, since
23600 1024-bit is uncomfortably small these days). Addresses ticket 10324.
23603 Changes in version 0.2.4.20 - 2013-12-22
23604 Tor 0.2.4.20 fixes potentially poor random number generation for users
23605 who 1) use OpenSSL 1.0.0 or later, 2) set "HardwareAccel 1" in their
23606 torrc file, 3) have "Sandy Bridge" or "Ivy Bridge" Intel processors,
23607 and 4) have no state file in their DataDirectory (as would happen on
23608 first start). Users who generated relay or hidden service identity
23609 keys in such a situation should discard them and generate new ones.
23611 This release also fixes a logic error that caused Tor clients to build
23612 many more preemptive circuits than they actually need.
23615 - Do not allow OpenSSL engines to replace the PRNG, even when
23616 HardwareAccel is set. The only default builtin PRNG engine uses
23617 the Intel RDRAND instruction to replace the entire PRNG, and
23618 ignores all attempts to seed it with more entropy. That's
23619 cryptographically stupid: the right response to a new alleged
23620 entropy source is never to discard all previously used entropy
23621 sources. Fixes bug 10402; works around behavior introduced in
23622 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
23624 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
23625 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
23626 - Avoid launching spurious extra circuits when a stream is pending.
23627 This fixes a bug where any circuit that _wasn't_ unusable for new
23628 streams would be treated as if it were, causing extra circuits to
23629 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
23632 - Avoid a crash bug when starting with a corrupted microdescriptor
23633 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
23634 - If we fail to dump a previously cached microdescriptor to disk, avoid
23635 freeing duplicate data later on. Fixes bug 10423; bugfix on
23636 0.2.4.13-alpha. Spotted by "bobnomnom".
23639 Changes in version 0.2.4.19 - 2013-12-11
23640 The Tor 0.2.4 release series is dedicated to the memory of Aaron Swartz
23641 (1986-2013). Aaron worked on diverse projects including helping to guide
23642 Creative Commons, playing a key role in stopping SOPA/PIPA, bringing
23643 transparency to the U.S government's PACER documents, and contributing
23644 design and development for Tor and Tor2Web. Aaron was one of the latest
23645 martyrs in our collective fight for civil liberties and human rights,
23646 and his death is all the more painful because he was one of us.
23648 Tor 0.2.4.19, the first stable release in the 0.2.4 branch, features
23649 a new circuit handshake and link encryption that use ECC to provide
23650 better security and efficiency; makes relays better manage circuit
23651 creation requests; uses "directory guards" to reduce client enumeration
23652 risks; makes bridges collect and report statistics about the pluggable
23653 transports they support; cleans up and improves our geoip database;
23654 gets much closer to IPv6 support for clients, bridges, and relays; makes
23655 directory authorities use measured bandwidths rather than advertised
23656 ones when computing flags and thresholds; disables client-side DNS
23657 caching to reduce tracking risks; and fixes a big bug in bridge
23658 reachability testing. This release introduces two new design
23659 abstractions in the code: a new "channel" abstraction between circuits
23660 and or_connections to allow for implementing alternate relay-to-relay
23661 transports, and a new "circuitmux" abstraction storing the queue of
23662 circuits for a channel. The release also includes many stability,
23663 security, and privacy fixes.
23666 Changes in version 0.2.4.18-rc - 2013-11-16
23667 Tor 0.2.4.18-rc is the fourth release candidate for the Tor 0.2.4.x
23668 series. It takes a variety of fixes from the 0.2.5.x branch to improve
23669 stability, performance, and better handling of edge cases.
23672 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
23673 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
23674 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
23675 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
23676 them to solve bug 6033.)
23679 - No longer stop reading or writing on cpuworker connections when
23680 our rate limiting buckets go empty. Now we should handle circuit
23681 handshake requests more promptly. Resolves bug 9731.
23682 - If we are unable to save a microdescriptor to the journal, do not
23683 drop it from memory and then reattempt downloading it. Fixes bug
23684 9645; bugfix on 0.2.2.6-alpha.
23685 - Stop trying to bootstrap all our directory information from
23686 only our first guard. Discovered while fixing bug 9946; bugfix
23688 - The new channel code sometimes lost track of in-progress circuits,
23689 causing long-running clients to stop building new circuits. The
23690 fix is to always call circuit_n_chan_done(chan, 0) from
23691 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
23693 o Minor bugfixes (on 0.2.4.x):
23694 - Correctly log long IPv6 exit policies, instead of truncating them
23695 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
23696 - Our default TLS ecdhe groups were backwards: we meant to be using
23697 P224 for relays (for performance win) and P256 for bridges (since
23698 it is more common in the wild). Instead we had it backwards. After
23699 reconsideration, we decided that the default should be P256 on all
23700 hosts, since its security is probably better, and since P224 is
23701 reportedly used quite little in the wild. Found by "skruffy" on
23702 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
23703 - Free directory authority certificate download statuses on exit
23704 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
23706 o Minor bugfixes (on 0.2.3.x and earlier):
23707 - If the guard we choose first doesn't answer, we would try the
23708 second guard, but once we connected to the second guard we would
23709 abandon it and retry the first one, slowing down bootstrapping.
23710 The fix is to treat all our initially chosen guards as acceptable
23711 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
23712 - Fix an assertion failure that would occur when disabling the
23713 ORPort setting on a running Tor process while accounting was
23714 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
23715 - When examining the list of network interfaces to find our address,
23716 do not consider non-running or disabled network interfaces. Fixes
23717 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
23718 - Avoid an off-by-one error when checking buffer boundaries when
23719 formatting the exit status of a pluggable transport helper.
23720 This is probably not an exploitable bug, but better safe than
23721 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
23724 o Minor features (protecting client timestamps):
23725 - Clients no longer send timestamps in their NETINFO cells. These were
23726 not used for anything, and they provided one small way for clients
23727 to be distinguished from each other as they moved from network to
23728 network or behind NAT. Implements part of proposal 222.
23729 - Clients now round timestamps in INTRODUCE cells down to the nearest
23730 10 minutes. If a new Support022HiddenServices option is set to 0, or
23731 if it's set to "auto" and the feature is disabled in the consensus,
23732 the timestamp is sent as 0 instead. Implements part of proposal 222.
23733 - Stop sending timestamps in AUTHENTICATE cells. This is not such
23734 a big deal from a security point of view, but it achieves no actual
23735 good purpose, and isn't needed. Implements part of proposal 222.
23736 - Reduce down accuracy of timestamps in hidden service descriptors.
23737 Implements part of proposal 222.
23739 o Minor features (other):
23740 - Improve the circuit queue out-of-memory handler. Previously, when
23741 we ran low on memory, we'd close whichever circuits had the most
23742 queued cells. Now, we close those that have the *oldest* queued
23743 cells, on the theory that those are most responsible for us
23744 running low on memory. Based on analysis from a forthcoming paper
23745 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
23746 - Generate bootstrapping status update events correctly when fetching
23747 microdescriptors. Fixes bug 9927.
23748 - Update to the October 2 2013 Maxmind GeoLite Country database.
23750 o Documentation fixes:
23751 - Clarify the usage and risks of setting the ContactInfo torrc line
23752 for your relay or bridge. Resolves ticket 9854.
23753 - Add anchors to the manpage so we can link to the html version of
23754 the documentation for specific options. Resolves ticket 9866.
23755 - Replace remaining references to DirServer in man page and
23756 log entries. Resolves ticket 10124.
23759 Changes in version 0.2.5.1-alpha - 2013-10-02
23760 Tor 0.2.5.1-alpha introduces experimental support for syscall sandboxing
23761 on Linux, allows bridges that offer pluggable transports to report usage
23762 statistics, fixes many issues to make testing easier, and provides
23763 a pile of minor features and bugfixes that have been waiting for a
23764 release of the new branch.
23766 This is the first alpha release in a new series, so expect there to
23767 be bugs. Users who would rather test out a more stable branch should
23768 stay with 0.2.4.x for now.
23770 o Major features (security):
23771 - Use the seccomp2 syscall filtering facility on Linux to limit
23772 which system calls Tor can invoke. This is an experimental,
23773 Linux-only feature to provide defense-in-depth against unknown
23774 attacks. To try turning it on, set "Sandbox 1" in your torrc
23775 file. Please be ready to report bugs. We hope to add support
23776 for better sandboxing in the future, including more fine-grained
23777 filters, better division of responsibility, and support for more
23778 platforms. This work has been done by Cristian-Matei Toader for
23779 Google Summer of Code.
23780 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
23781 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
23782 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
23783 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
23784 them to solve bug 6033.)
23786 o Major features (other):
23787 - Add support for passing arguments to managed pluggable transport
23788 proxies. Implements ticket 3594.
23789 - Bridges now track GeoIP information and the number of their users
23790 even when pluggable transports are in use, and report usage
23791 statistics in their extra-info descriptors. Resolves tickets 4773
23793 - Make testing Tor networks bootstrap better: lower directory fetch
23794 retry schedules and maximum interval without directory requests,
23795 and raise maximum download tries. Implements ticket 6752.
23796 - Add make target 'test-network' to run tests on a Chutney network.
23797 Implements ticket 8530.
23798 - The ntor handshake is now on-by-default, no matter what the
23799 directory authorities recommend. Implements ticket 8561.
23802 - Instead of writing destroy cells directly to outgoing connection
23803 buffers, queue them and intersperse them with other outgoing cells.
23804 This can prevent a set of resource starvation conditions where too
23805 many pending destroy cells prevent data cells from actually getting
23806 delivered. Reported by "oftc_must_be_destroyed". Fixes bug 7912;
23807 bugfix on 0.2.0.1-alpha.
23808 - If we are unable to save a microdescriptor to the journal, do not
23809 drop it from memory and then reattempt downloading it. Fixes bug
23810 9645; bugfix on 0.2.2.6-alpha.
23811 - The new channel code sometimes lost track of in-progress circuits,
23812 causing long-running clients to stop building new circuits. The
23813 fix is to always call circuit_n_chan_done(chan, 0) from
23814 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
23817 - Tor now builds each source file in two modes: a mode that avoids
23818 exposing identifiers needlessly, and another mode that exposes
23819 more identifiers for testing. This lets the compiler do better at
23820 optimizing the production code, while enabling us to take more
23821 radical measures to let the unit tests test things.
23822 - The production builds no longer include functions used only in
23823 the unit tests; all functions exposed from a module only for
23824 unit-testing are now static in production builds.
23825 - Add an --enable-coverage configuration option to make the unit
23826 tests (and a new src/or/tor-cov target) to build with gcov test
23830 - We now have rudimentary function mocking support that our unit
23831 tests can use to test functions in isolation. Function mocking
23832 lets the tests temporarily replace a function's dependencies with
23833 stub functions, so that the tests can check the function without
23834 invoking the other functions it calls.
23835 - Add more unit tests for the <circid,channel>->circuit map, and
23836 the destroy-cell-tracking code to fix bug 7912.
23837 - Unit tests for failing cases of the TAP onion handshake.
23838 - More unit tests for address-manipulation functions.
23840 o Minor features (protecting client timestamps):
23841 - Clients no longer send timestamps in their NETINFO cells. These were
23842 not used for anything, and they provided one small way for clients
23843 to be distinguished from each other as they moved from network to
23844 network or behind NAT. Implements part of proposal 222.
23845 - Clients now round timestamps in INTRODUCE cells down to the nearest
23846 10 minutes. If a new Support022HiddenServices option is set to 0, or
23847 if it's set to "auto" and the feature is disabled in the consensus,
23848 the timestamp is sent as 0 instead. Implements part of proposal 222.
23849 - Stop sending timestamps in AUTHENTICATE cells. This is not such
23850 a big deal from a security point of view, but it achieves no actual
23851 good purpose, and isn't needed. Implements part of proposal 222.
23852 - Reduce down accuracy of timestamps in hidden service descriptors.
23853 Implements part of proposal 222.
23855 o Minor features (config options):
23856 - Config (torrc) lines now handle fingerprints which are missing
23857 their initial '$'. Resolves ticket 4341; improvement over 0.0.9pre5.
23858 - Support a --dump-config option to print some or all of the
23859 configured options. Mainly useful for debugging the command-line
23860 option parsing code. Helps resolve ticket 4647.
23861 - Raise awareness of safer logging: notify user of potentially
23862 unsafe config options, like logging more verbosely than severity
23863 "notice" or setting SafeLogging to 0. Resolves ticket 5584.
23864 - Add a new configuration option TestingV3AuthVotingStartOffset
23865 that bootstraps a network faster by changing the timing for
23866 consensus votes. Addresses ticket 8532.
23867 - Add a new torrc option "ServerTransportOptions" that allows
23868 bridge operators to pass configuration parameters to their
23869 pluggable transports. Resolves ticket 8929.
23870 - The config (torrc) file now accepts bandwidth and space limits in
23871 bits as well as bytes. (Anywhere that you can say "2 Kilobytes",
23872 you can now say "16 kilobits", and so on.) Resolves ticket 9214.
23875 o Minor features (build):
23876 - Add support for `--library-versions` flag. Implements ticket 6384.
23877 - Return the "unexpected sendme" warnings to a warn severity, but make
23878 them rate limited, to help diagnose ticket 8093.
23879 - Detect a missing asciidoc, and warn the user about it, during
23880 configure rather than at build time. Fixes issue 6506. Patch from
23883 o Minor features (other):
23884 - Use the SOCK_NONBLOCK socket type, if supported, to open nonblocking
23885 sockets in a single system call. Implements ticket 5129.
23886 - Log current accounting state (bytes sent and received + remaining
23887 time for the current accounting period) in the relay's heartbeat
23888 message. Implements ticket 5526; patch from Peter Retzlaff.
23889 - Implement the TRANSPORT_LAUNCHED control port event that
23890 notifies controllers about new launched pluggable
23891 transports. Resolves ticket 5609.
23892 - If we're using the pure-C 32-bit curve25519_donna implementation
23893 of curve25519, build it with the -fomit-frame-pointer option to
23894 make it go faster on register-starved hosts. This improves our
23895 handshake performance by about 6% on i386 hosts without nacl.
23896 Closes ticket 8109.
23897 - Update to the September 4 2013 Maxmind GeoLite Country database.
23900 - Set the listen() backlog limit to the largest actually supported
23901 on the system, not to the value in a header file. Fixes bug 9716;
23902 bugfix on every released Tor.
23903 - No longer accept malformed http headers when parsing urls from
23904 headers. Now we reply with Bad Request ("400"). Fixes bug 2767;
23905 bugfix on 0.0.6pre1.
23906 - In munge_extrainfo_into_routerinfo(), check the return value of
23907 memchr(). This would have been a serious issue if we ever passed
23908 it a non-extrainfo. Fixes bug 8791; bugfix on 0.2.0.6-alpha. Patch
23910 - On the chance that somebody manages to build Tor on a
23911 platform where time_t is unsigned, correct the way that
23912 microdesc_add_to_cache() handles negative time arguments.
23913 Fixes bug 8042; bugfix on 0.2.3.1-alpha.
23914 - Reject relative control socket paths and emit a warning. Previously,
23915 single-component control socket paths would be rejected, but Tor
23916 would not log why it could not validate the config. Fixes bug 9258;
23917 bugfix on 0.2.3.16-alpha.
23919 o Minor bugfixes (command line):
23920 - Use a single command-line parser for parsing torrc options on the
23921 command line and for finding special command-line options to avoid
23922 inconsistent behavior for torrc option arguments that have the same
23923 names as command-line options. Fixes bugs 4647 and 9578; bugfix on
23925 - No longer allow 'tor --hash-password' with no arguments. Fixes bug
23926 9573; bugfix on 0.0.9pre5.
23928 o Minor fixes (build, auxiliary programs):
23929 - Stop preprocessing the "torify" script with autoconf, since
23930 it no longer refers to LOCALSTATEDIR. Fixes bug 5505; patch
23932 - The tor-fw-helper program now follows the standard convention and
23933 exits with status code "0" on success. Fixes bug 9030; bugfix on
23934 0.2.3.1-alpha. Patch by Arlo Breault.
23935 - Corrected ./configure advice for what openssl dev package you should
23936 install on Debian. Fixes bug 9207; bugfix on 0.2.0.1-alpha.
23938 o Minor code improvements:
23939 - Remove constants and tests for PKCS1 padding; it's insecure and
23940 shouldn't be used for anything new. Fixes bug 8792; patch
23942 - Remove instances of strcpy() from the unit tests. They weren't
23943 hurting anything, since they were only in the unit tests, but it's
23944 embarrassing to have strcpy() in the code at all, and some analysis
23945 tools don't like it. Fixes bug 8790; bugfix on 0.2.3.6-alpha and
23946 0.2.3.8-alpha. Patch from Arlo Breault.
23948 o Removed features:
23949 - Remove migration code from when we renamed the "cached-routers"
23950 file to "cached-descriptors" back in 0.2.0.8-alpha. This
23951 incidentally resolves ticket 6502 by cleaning up the related code
23952 a bit. Patch from Akshay Hebbar.
23954 o Code simplification and refactoring:
23955 - Extract the common duplicated code for creating a subdirectory
23956 of the data directory and writing to a file in it. Fixes ticket
23957 4282; patch from Peter Retzlaff.
23958 - Since OpenSSL 0.9.7, the i2d_*() functions support allocating output
23959 buffer. Avoid calling twice: i2d_RSAPublicKey(), i2d_DHparams(),
23960 i2d_X509(), and i2d_PublicKey(). Resolves ticket 5170.
23961 - Add a set of accessor functions for the circuit timeout data
23962 structure. Fixes ticket 6153; patch from "piet".
23963 - Clean up exit paths from connection_listener_new(). Closes ticket
23964 8789. Patch from Arlo Breault.
23965 - Since we rely on OpenSSL 0.9.8 now, we can use EVP_PKEY_cmp()
23966 and drop our own custom pkey_eq() implementation. Fixes bug 9043.
23967 - Use a doubly-linked list to implement the global circuit list.
23968 Resolves ticket 9108. Patch from Marek Majkowski.
23969 - Remove contrib/id_to_fp.c since it wasn't used anywhere.
23972 Changes in version 0.2.4.17-rc - 2013-09-05
23973 Tor 0.2.4.17-rc is the third release candidate for the Tor 0.2.4.x
23974 series. It adds an emergency step to help us tolerate the massive
23975 influx of users: 0.2.4 clients using the new (faster and safer) "NTor"
23976 circuit-level handshakes now effectively jump the queue compared to
23977 the 0.2.3 clients using "TAP" handshakes. This release also fixes a
23978 big bug hindering bridge reachability tests.
23981 - Relays now process the new "NTor" circuit-level handshake requests
23982 with higher priority than the old "TAP" circuit-level handshake
23983 requests. We still process some TAP requests to not totally starve
23984 0.2.3 clients when NTor becomes popular. A new consensus parameter
23985 "NumNTorsPerTAP" lets us tune the balance later if we need to.
23986 Implements ticket 9574.
23989 - If the circuit build timeout logic is disabled (via the consensus,
23990 or because we are an authority), then don't build testing circuits.
23991 Fixes bug 9657; bugfix on 0.2.2.14-alpha.
23992 - Bridges now send AUTH_CHALLENGE cells during their v3 handshakes;
23993 previously they did not, which prevented them from receiving
23994 successful connections from relays for self-test or bandwidth
23995 testing. Also, when a relay is extending a circuit to a bridge,
23996 it needs to send a NETINFO cell, even when the bridge hasn't sent
23997 an AUTH_CHALLENGE cell. Fixes bug 9546; bugfix on 0.2.3.6-alpha.
23998 - If the time to download the next old-style networkstatus is in
23999 the future, do not decline to consider whether to download the
24000 next microdescriptor networkstatus. Fixes bug 9564; bugfix on
24004 - Avoid double-closing the listener socket in our socketpair()
24005 replacement (used on Windows) in the case where the addresses on
24006 our opened sockets don't match what we expected. Fixes bug 9400;
24007 bugfix on 0.0.2pre7. Found by Coverity.
24009 o Minor fixes (config options):
24010 - Avoid overflows when the user sets MaxCircuitDirtiness to a
24011 ridiculously high value, by imposing a (ridiculously high) 30-day
24012 maximum on MaxCircuitDirtiness.
24013 - Fix the documentation of HeartbeatPeriod to say that the heartbeat
24014 message is logged at notice, not at info.
24015 - Warn and fail if a server is configured not to advertise any
24016 ORPorts at all. (We need *something* to put in our descriptor,
24017 or we just won't work.)
24020 - Track how many "TAP" and "NTor" circuit handshake requests we get,
24021 and how many we complete, and log it every hour to help relay
24022 operators follow trends in network load. Addresses ticket 9658.
24023 - Update to the August 7 2013 Maxmind GeoLite Country database.
24026 Changes in version 0.2.4.16-rc - 2013-08-10
24027 Tor 0.2.4.16-rc is the second release candidate for the Tor 0.2.4.x
24028 series. It fixes several crash bugs in the 0.2.4 branch.
24031 - Fix a bug in the voting algorithm that could yield incorrect results
24032 when a non-naming authority declared too many flags. Fixes bug 9200;
24033 bugfix on 0.2.0.3-alpha.
24034 - Fix an uninitialized read that could in some cases lead to a remote
24035 crash while parsing INTRODUCE2 cells. Bugfix on 0.2.4.1-alpha.
24036 Anybody running a hidden service on the experimental 0.2.4.x
24037 branch should upgrade. (This is, so far as we know, unrelated to
24039 - Avoid an assertion failure when processing DNS replies without the
24040 answer types we expected. Fixes bug 9337; bugfix on 0.2.4.7-alpha.
24041 - Avoid a crash when using --hash-password. Fixes bug 9295; bugfix on
24042 0.2.4.15-rc. Found by stem integration tests.
24045 - Fix an invalid memory read that occurred when a pluggable
24046 transport proxy failed its configuration protocol.
24047 Fixes bug 9288; bugfix on 0.2.4.1-alpha.
24048 - When evaluating whether to use a connection that we haven't
24049 decided is canonical using a recent link protocol version,
24050 decide that it's canonical only if it used address _does_
24051 match the desired address. Fixes bug 9309; bugfix on
24052 0.2.4.4-alpha. Reported by skruffy.
24053 - Make the default behavior of NumDirectoryGuards be to track
24054 NumEntryGuards. Now a user who changes only NumEntryGuards will get
24055 the behavior she expects. Fixes bug 9354; bugfix on 0.2.4.8-alpha.
24056 - Fix a spurious compilation warning with some older versions of
24057 GCC on FreeBSD. Fixes bug 9254; bugfix on 0.2.4.14-alpha.
24060 - Update to the July 3 2013 Maxmind GeoLite Country database.
24063 Changes in version 0.2.4.15-rc - 2013-07-01
24064 Tor 0.2.4.15-rc is the first release candidate for the Tor 0.2.4.x
24065 series. It fixes a few smaller bugs, but generally appears stable.
24066 Please test it and let us know whether it is!
24069 - When receiving a new configuration file via the control port's
24070 LOADCONF command, do not treat the defaults file as absent.
24071 Fixes bug 9122; bugfix on 0.2.3.9-alpha.
24074 - Issue a warning when running with the bufferevents backend enabled.
24075 It's still not stable, and people should know that they're likely
24076 to hit unexpected problems. Closes ticket 9147.
24079 Changes in version 0.2.4.14-alpha - 2013-06-18
24080 Tor 0.2.4.14-alpha fixes a pair of client guard enumeration problems
24081 present in 0.2.4.13-alpha.
24084 - When we have too much memory queued in circuits (according to a new
24085 MaxMemInCellQueues option), close the circuits consuming the most
24086 memory. This prevents us from running out of memory as a relay if
24087 circuits fill up faster than they can be drained. Fixes bug 9063;
24088 bugfix on the 54th commit of Tor. This bug is a further fix beyond
24089 bug 6252, whose fix was merged into 0.2.3.21-rc.
24091 This change also fixes an earlier approach taken in 0.2.4.13-alpha,
24092 where we tried to solve this issue simply by imposing an upper limit
24093 on the number of queued cells for a single circuit. That approach
24094 proved to be problematic, since there are ways to provoke clients to
24095 send a number of cells in excess of any such reasonable limit. Fixes
24096 bug 9072; bugfix on 0.2.4.13-alpha.
24098 - Limit hidden service descriptors to at most ten introduction
24099 points, to slow one kind of guard enumeration. Fixes bug 9002;
24100 bugfix on 0.1.1.11-alpha.
24103 Changes in version 0.2.4.13-alpha - 2013-06-14
24104 Tor 0.2.4.13-alpha fixes a variety of potential remote crash
24105 vulnerabilities, makes socks5 username/password circuit isolation
24106 actually actually work (this time for sure!), and cleans up a bunch
24107 of other issues in preparation for a release candidate.
24109 o Major bugfixes (robustness):
24110 - Close any circuit that has too many cells queued on it. Fixes
24111 bug 9063; bugfix on the 54th commit of Tor. This bug is a further
24112 fix beyond bug 6252, whose fix was merged into 0.2.3.21-rc.
24113 - Prevent the get_freelists() function from running off the end of
24114 the list of freelists if it somehow gets an unrecognized
24115 allocation. Fixes bug 8844; bugfix on 0.2.0.16-alpha. Reported by
24117 - Avoid an assertion failure on OpenBSD (and perhaps other BSDs)
24118 when an exit connection with optimistic data succeeds immediately
24119 rather than returning EINPROGRESS. Fixes bug 9017; bugfix on
24121 - Fix a directory authority crash bug when building a consensus
24122 using an older consensus as its basis. Fixes bug 8833. Bugfix
24126 - Avoid a memory leak where we would leak a consensus body when we
24127 find that a consensus which we couldn't previously verify due to
24128 missing certificates is now verifiable. Fixes bug 8719; bugfix
24130 - We used to always request authority certificates by identity digest,
24131 meaning we'd get the newest one even when we wanted one with a
24132 different signing key. Then we would complain about being given
24133 a certificate we already had, and never get the one we really
24134 wanted. Now we use the "fp-sk/" resource as well as the "fp/"
24135 resource to request the one we want. Fixes bug 5595; bugfix on
24137 - Follow the socks5 protocol when offering username/password
24138 authentication. The fix for bug 8117 exposed this bug, and it
24139 turns out real-world applications like Pidgin do care. Bugfix on
24140 0.2.3.2-alpha; fixes bug 8879.
24141 - Prevent failures on Windows Vista and later when rebuilding the
24142 microdescriptor cache. Diagnosed by Robert Ransom. Fixes bug 8822;
24143 bugfix on 0.2.4.12-alpha.
24146 - Fix an impossible buffer overrun in the AES unit tests. Fixes
24147 bug 8845; bugfix on 0.2.0.7-alpha. Found by eugenis.
24148 - If for some reason we fail to write a microdescriptor while
24149 rebuilding the cache, do not let the annotations from that
24150 microdescriptor linger in the cache file, and do not let the
24151 microdescriptor stay recorded as present in its old location.
24152 Fixes bug 9047; bugfix on 0.2.2.6-alpha.
24153 - Fix a memory leak that would occur whenever a configuration
24154 option changed. Fixes bug 8718; bugfix on 0.2.3.3-alpha.
24155 - Paste the description for PathBias parameters from the man
24156 page into or.h, so the code documents them too. Fixes bug 7982;
24157 bugfix on 0.2.3.17-beta and 0.2.4.8-alpha.
24158 - Relays now treat a changed IPv6 ORPort as sufficient reason to
24159 publish an updated descriptor. Fixes bug 6026; bugfix on
24161 - When launching a resolve request on behalf of an AF_UNIX control
24162 socket, omit the address field of the new entry connection, used in
24163 subsequent controller events, rather than letting tor_dup_addr()
24164 set it to "<unknown address type>". Fixes bug 8639; bugfix on
24167 o Minor bugfixes (log messages):
24168 - Fix a scaling issue in the path bias accounting code that
24169 resulted in "Bug:" log messages from either
24170 pathbias_scale_close_rates() or pathbias_count_build_success().
24171 This represents a bugfix on a previous bugfix: the original fix
24172 attempted in 0.2.4.10-alpha was incomplete. Fixes bug 8235; bugfix
24174 - Give a less useless error message when the user asks for an IPv4
24175 address on an IPv6-only port, or vice versa. Fixes bug 8846; bugfix
24179 - Downgrade "unexpected SENDME" warnings to protocol-warn for 0.2.4.x,
24180 to tolerate bug 8093 for now.
24181 - Add an "ignoring-advertised-bws" boolean to the flag-threshold lines
24182 in directory authority votes to describe whether they have enough
24183 measured bandwidths to ignore advertised (relay descriptor)
24184 bandwidth claims. Resolves ticket 8711.
24185 - Update to the June 5 2013 Maxmind GeoLite Country database.
24187 o Removed documentation:
24188 - Remove some of the older contents of doc/ as obsolete; move others
24189 to torspec.git. Fixes bug 8965.
24191 o Code simplification and refactoring:
24192 - Avoid using character buffers when constructing most directory
24193 objects: this approach was unwieldy and error-prone. Instead,
24194 build smartlists of strings, and concatenate them when done.
24197 Changes in version 0.2.4.12-alpha - 2013-04-18
24198 Tor 0.2.4.12-alpha moves Tor forward on several fronts: it starts the
24199 process for lengthening the guard rotation period, makes directory
24200 authority opinions in the consensus a bit less gameable, makes socks5
24201 username/password circuit isolation actually work, and fixes a wide
24202 variety of other issues.
24205 - Raise the default time that a client keeps an entry guard from
24206 "1-2 months" to "2-3 months", as suggested by Tariq Elahi's WPES
24207 2012 paper. (We would make it even longer, but we need better client
24208 load balancing first.) Also, make the guard lifetime controllable
24209 via a new GuardLifetime torrc option and a GuardLifetime consensus
24210 parameter. Start of a fix for bug 8240; bugfix on 0.1.1.11-alpha.
24211 - Directory authorities now prefer using measured bandwidths to
24212 advertised ones when computing flags and thresholds. Resolves
24214 - Directory authorities that have more than a threshold number
24215 of relays with measured bandwidths now treat relays with unmeasured
24216 bandwidths as having bandwidth 0. Resolves ticket 8435.
24218 o Major bugfixes (assert / resource use):
24219 - Avoid a bug where our response to TLS renegotiation under certain
24220 network conditions could lead to a busy-loop, with 100% CPU
24221 consumption. Fixes bug 5650; bugfix on 0.2.0.16-alpha.
24222 - Avoid an assertion when we discover that we'd like to write a cell
24223 onto a closing connection: just discard the cell. Fixes another
24224 case of bug 7350; bugfix on 0.2.4.4-alpha.
24226 o Major bugfixes (client-side privacy):
24227 - When we mark a circuit as unusable for new circuits, have it
24228 continue to be unusable for new circuits even if MaxCircuitDirtiness
24229 is increased too much at the wrong time, or the system clock jumps
24230 backwards. Fixes bug 6174; bugfix on 0.0.2pre26.
24231 - If ClientDNSRejectInternalAddresses ("do not believe DNS queries
24232 which have resolved to internal addresses") is set, apply that
24233 rule to IPv6 as well. Fixes bug 8475; bugfix on 0.2.0.7-alpha.
24234 - When an exit relay rejects a stream with reason "exit policy", but
24235 we only know an exit policy summary (e.g. from the microdesc
24236 consensus) for it, do not mark the relay as useless for all exiting.
24237 Instead, mark just the circuit as unsuitable for that particular
24238 address. Fixes part of bug 7582; bugfix on 0.2.3.2-alpha.
24239 - Allow applications to get proper stream isolation with
24240 IsolateSOCKSAuth. Many SOCKS5 clients that want to offer
24241 username/password authentication also offer "no authentication". Tor
24242 had previously preferred "no authentication", so the applications
24243 never actually sent Tor their auth details. Now Tor selects
24244 username/password authentication if it's offered. You can disable
24245 this behavior on a per-SOCKSPort basis via PreferSOCKSNoAuth. Fixes
24246 bug 8117; bugfix on 0.2.3.3-alpha.
24248 o Major bugfixes (other):
24249 - When unable to find any working directory nodes to use as a
24250 directory guard, give up rather than adding the same non-working
24251 nodes to the directory guard list over and over. Fixes bug 8231;
24252 bugfix on 0.2.4.8-alpha.
24255 - Reject as invalid most directory objects containing a NUL.
24256 Belt-and-suspender fix for bug 8037.
24257 - In our testsuite, create temporary directories with a bit more
24258 entropy in their name to make name collisions less likely. Fixes
24260 - Add CACHED keyword to ADDRMAP events in the control protocol
24261 to indicate whether a DNS result will be cached or not. Resolves
24263 - Update to the April 3 2013 Maxmind GeoLite Country database.
24265 o Minor features (build):
24266 - Detect and reject attempts to build Tor with threading support
24267 when OpenSSL has been compiled without threading support.
24269 - Clarify that when autoconf is checking for nacl, it is checking
24270 specifically for nacl with a fast curve25519 implementation.
24272 - Warn if building on a platform with an unsigned time_t: there
24273 are too many places where Tor currently assumes that time_t can
24274 hold negative values. We'd like to fix them all, but probably
24277 o Minor bugfixes (build):
24278 - Fix some bugs in tor-fw-helper-natpmp when trying to build and
24279 run it on Windows. More bugs likely remain. Patch from Gisle Vanem.
24280 Fixes bug 7280; bugfix on 0.2.3.1-alpha.
24281 - Add the old src/or/micro-revision.i filename to CLEANFILES.
24282 On the off chance that somebody has one, it will go away as soon
24283 as they run "make clean". Fix for bug 7143; bugfix on 0.2.4.1-alpha.
24284 - Build Tor correctly on 32-bit platforms where the compiler can build
24285 but not run code using the "uint128_t" construction. Fixes bug 8587;
24286 bugfix on 0.2.4.8-alpha.
24287 - Fix compilation warning with some versions of clang that would
24288 prefer the -Wswitch-enum compiler flag to warn about switch
24289 statements with missing enum values, even if those switch
24290 statements have a "default:" statement. Fixes bug 8598; bugfix
24293 o Minor bugfixes (protocol):
24294 - Fix the handling of a TRUNCATE cell when it arrives while the
24295 circuit extension is in progress. Fixes bug 7947; bugfix on 0.0.7.1.
24296 - Fix a misframing issue when reading the version numbers in a
24297 VERSIONS cell. Previously we would recognize [00 01 00 02] as
24298 'version 1, version 2, and version 0x100', when it should have
24299 only included versions 1 and 2. Fixes bug 8059; bugfix on
24300 0.2.0.10-alpha. Reported pseudonymously.
24301 - Make the format and order of STREAM events for DNS lookups
24302 consistent among the various ways to launch DNS lookups. Fixes
24303 bug 8203; bugfix on 0.2.0.24-rc. Patch by "Desoxy".
24304 - Correct our check for which versions of Tor support the EXTEND2
24305 cell. We had been willing to send it to Tor 0.2.4.7-alpha and
24306 later, when support was really added in version 0.2.4.8-alpha.
24307 Fixes bug 8464; bugfix on 0.2.4.8-alpha.
24309 o Minor bugfixes (other):
24310 - Correctly store microdescriptors and extrainfo descriptors with
24311 an internal NUL byte. Fixes bug 8037; bugfix on 0.2.0.1-alpha.
24312 Bug reported by "cypherpunks".
24313 - Increase the width of the field used to remember a connection's
24314 link protocol version to two bytes. Harmless for now, since the
24315 only currently recognized versions are one byte long. Reported
24316 pseudonymously. Fixes bug 8062; bugfix on 0.2.0.10-alpha.
24317 - If the state file's path bias counts are invalid (presumably from a
24318 buggy Tor prior to 0.2.4.10-alpha), make them correct. Also add
24319 additional checks and log messages to the scaling of Path Bias
24320 counts, in case there still are remaining issues with scaling.
24321 Should help resolve bug 8235.
24322 - Eliminate several instances where we use "Nickname=ID" to refer to
24323 nodes in logs. Use "Nickname (ID)" instead. (Elsewhere, we still use
24324 "$ID=Nickname", which is also acceptable.) Fixes bug 7065. Bugfix
24325 on 0.2.3.21-rc, 0.2.4.5-alpha, 0.2.4.8-alpha, and 0.2.4.10-alpha.
24327 o Minor bugfixes (syscalls):
24328 - Always check the return values of functions fcntl() and
24329 setsockopt(). We don't believe these are ever actually failing in
24330 practice, but better safe than sorry. Also, checking these return
24331 values should please analysis tools like Coverity. Patch from
24332 'flupzor'. Fixes bug 8206; bugfix on all versions of Tor.
24333 - Use direct writes rather than stdio when building microdescriptor
24334 caches, in an attempt to mitigate bug 8031, or at least make it
24337 o Minor bugfixes (config):
24338 - When rejecting a configuration because we were unable to parse a
24339 quoted string, log an actual error message. Fixes bug 7950; bugfix
24341 - Behave correctly when the user disables LearnCircuitBuildTimeout
24342 but doesn't tell us what they would like the timeout to be. Fixes
24343 bug 6304; bugfix on 0.2.2.14-alpha.
24344 - When autodetecting the number of CPUs, use the number of available
24345 CPUs in preference to the number of configured CPUs. Inform the
24346 user if this reduces the number of available CPUs. Fixes bug 8002;
24347 bugfix on 0.2.3.1-alpha.
24348 - Make it an error when you set EntryNodes but disable UseGuardNodes,
24349 since it will (surprisingly to some users) ignore EntryNodes. Fixes
24350 bug 8180; bugfix on 0.2.3.11-alpha.
24351 - Allow TestingTorNetworks to override the 4096-byte minimum for
24352 the Fast threshold. Otherwise they can't bootstrap until they've
24353 observed more traffic. Fixes bug 8508; bugfix on 0.2.4.10-alpha.
24354 - Fix some logic errors when the user manually overrides the
24355 PathsNeededToBuildCircuits option in torrc. Fixes bug 8599; bugfix
24358 o Minor bugfixes (log messages to help diagnose bugs):
24359 - If we fail to free a microdescriptor because of bug 7164, log
24360 the filename and line number from which we tried to free it.
24361 - Add another diagnostic to the heartbeat message: track and log
24362 overhead that TLS is adding to the data we write. If this is
24363 high, we are sending too little data to SSL_write at a time.
24364 Diagnostic for bug 7707.
24365 - Add more detail to a log message about relaxed timeouts, to help
24367 - Warn more aggressively when flushing microdescriptors to a
24368 microdescriptor cache fails, in an attempt to mitigate bug 8031,
24369 or at least make it more diagnosable.
24370 - Improve debugging output to help track down bug 8185 ("Bug:
24371 outgoing relay cell has n_chan==NULL. Dropping.")
24372 - Log the purpose of a path-bias testing circuit correctly.
24373 Improves a log message from bug 8477; bugfix on 0.2.4.8-alpha.
24375 o Minor bugfixes (0.2.4.x log messages that were too noisy):
24376 - Don't attempt to relax the timeout of already opened 1-hop circuits.
24377 They might never timeout. This should eliminate some/all cases of
24378 the relaxed timeout log message.
24379 - Use circuit creation time for network liveness evaluation. This
24380 should eliminate warning log messages about liveness caused
24381 by changes in timeout evaluation. Fixes bug 6572; bugfix on
24383 - Reduce a path bias length check from notice to info. The message
24384 is triggered when creating controller circuits. Fixes bug 8196;
24385 bugfix on 0.2.4.8-alpha.
24386 - Fix a path state issue that triggered a notice during relay startup.
24387 Fixes bug 8320; bugfix on 0.2.4.10-alpha.
24388 - Reduce occurrences of warns about circuit purpose in
24389 connection_ap_expire_building(). Fixes bug 8477; bugfix on
24392 o Minor bugfixes (pre-0.2.4.x log messages that were too noisy):
24393 - If we encounter a write failure on a SOCKS connection before we
24394 finish our SOCKS handshake, don't warn that we closed the
24395 connection before we could send a SOCKS reply. Fixes bug 8427;
24396 bugfix on 0.1.0.1-rc.
24397 - Correctly recognize that [::1] is a loopback address. Fixes
24398 bug 8377; bugfix on 0.2.1.3-alpha.
24399 - Fix a directory authority warn caused when we have a large amount
24400 of badexit bandwidth. Fixes bug 8419; bugfix on 0.2.2.10-alpha.
24401 - Don't log inappropriate heartbeat messages when hibernating: a
24402 hibernating node is _expected_ to drop out of the consensus,
24403 decide it isn't bootstrapped, and so forth. Fixes bug 7302;
24404 bugfix on 0.2.3.1-alpha.
24405 - Don't complain about bootstrapping problems while hibernating.
24406 These complaints reflect a general code problem, but not one
24407 with any problematic effects (no connections are actually
24408 opened). Fixes part of bug 7302; bugfix on 0.2.3.2-alpha.
24410 o Documentation fixes:
24411 - Update tor-fw-helper.1.txt and tor-fw-helper.c to make option
24412 names match. Fixes bug 7768.
24413 - Make the torify manpage no longer refer to tsocks; torify hasn't
24414 supported tsocks since 0.2.3.14-alpha.
24415 - Make the tor manpage no longer reference tsocks.
24416 - Fix the GeoIPExcludeUnknown documentation to refer to
24417 ExcludeExitNodes rather than the currently nonexistent
24418 ExcludeEntryNodes. Spotted by "hamahangi" on tor-talk.
24421 - The tor-tsocks.conf is no longer distributed or installed. We
24422 recommend that tsocks users use torsocks instead. Resolves
24426 Changes in version 0.2.4.11-alpha - 2013-03-11
24427 Tor 0.2.4.11-alpha makes relay measurement by directory authorities
24428 more robust, makes hidden service authentication work again, and
24429 resolves a DPI fingerprint for Tor's SSL transport.
24431 o Major features (directory authorities):
24432 - Directory authorities now support a new consensus method (17)
24433 where they cap the published bandwidth of servers for which
24434 insufficient bandwidth measurements exist. Fixes part of bug 2286.
24435 - Directory authorities that set "DisableV2DirectoryInfo_ 1" no longer
24436 serve any v2 directory information. Now we can test disabling the
24437 old deprecated v2 directory format, and see whether doing so has
24438 any effect on network load. Begins to fix bug 6783.
24439 - Directory authorities now include inside each vote a statement of
24440 the performance thresholds they used when assigning flags.
24441 Implements ticket 8151.
24443 o Major bugfixes (directory authorities):
24444 - Stop marking every relay as having been down for one hour every
24445 time we restart a directory authority. These artificial downtimes
24446 were messing with our Stable and Guard flag calculations. Fixes
24447 bug 8218 (introduced by the fix for 1035). Bugfix on 0.2.2.23-alpha.
24449 o Major bugfixes (hidden services):
24450 - Allow hidden service authentication to succeed again. When we
24451 refactored the hidden service introduction code back
24452 in 0.2.4.1-alpha, we didn't update the code that checks
24453 whether authentication information is present, causing all
24454 authentication checks to return "false". Fix for bug 8207; bugfix
24455 on 0.2.4.1-alpha. Found by Coverity; this is CID 718615.
24457 o Minor features (relays, bridges):
24458 - Make bridge relays check once a minute for whether their IP
24459 address has changed, rather than only every 15 minutes. Resolves
24460 bugs 1913 and 1992.
24461 - Refactor resolve_my_address() so it returns the method by which we
24462 decided our public IP address (explicitly configured, resolved from
24463 explicit hostname, guessed from interfaces, learned by gethostname).
24464 Now we can provide more helpful log messages when a relay guesses
24465 its IP address incorrectly (e.g. due to unexpected lines in
24466 /etc/hosts). Resolves ticket 2267.
24467 - Teach bridge-using clients to avoid 0.2.2 bridges when making
24468 microdescriptor-related dir requests, and only fall back to normal
24469 descriptors if none of their bridges can handle microdescriptors
24470 (as opposed to the fix in ticket 4013, which caused them to fall
24471 back to normal descriptors if *any* of their bridges preferred
24472 them). Resolves ticket 4994.
24473 - Randomize the lifetime of our SSL link certificate, so censors can't
24474 use the static value for filtering Tor flows. Resolves ticket 8443;
24475 related to ticket 4014 which was included in 0.2.2.33.
24476 - Support a new version of the link protocol that allows 4-byte circuit
24477 IDs. Previously, circuit IDs were limited to 2 bytes, which presented
24478 a possible resource exhaustion issue. Closes ticket 7351; implements
24481 o Minor features (portability):
24482 - Tweak the curve25519-donna*.c implementations to tolerate systems
24483 that lack stdint.h. Fixes bug 3894; bugfix on 0.2.4.8-alpha.
24484 - Use Ville Laurikari's implementation of AX_CHECK_SIGN() to determine
24485 the signs of types during autoconf. This is better than our old
24486 approach, which didn't work when cross-compiling.
24487 - Detect the sign of enum values, rather than assuming that MSC is the
24488 only compiler where enum types are all signed. Fixes bug 7727;
24489 bugfix on 0.2.4.10-alpha.
24491 o Minor features (other):
24492 - Say "KBytes" rather than "KB" in the man page (for various values
24493 of K), to further reduce confusion about whether Tor counts in
24494 units of memory or fractions of units of memory. Resolves ticket 7054.
24495 - Clear the high bit on curve25519 public keys before passing them to
24496 our backend, in case we ever wind up using a backend that doesn't do
24497 so itself. If we used such a backend, and *didn't* clear the high bit,
24498 we could wind up in a situation where users with such backends would
24499 be distinguishable from users without. Fixes bug 8121; bugfix on
24501 - Update to the March 6 2013 Maxmind GeoLite Country database.
24503 o Minor bugfixes (clients):
24504 - When we receive a RELAY_END cell with the reason DONE, or with no
24505 reason, before receiving a RELAY_CONNECTED cell, report the SOCKS
24506 status as "connection refused". Previously we reported these cases
24507 as success but then immediately closed the connection. Fixes bug
24508 7902; bugfix on 0.1.0.1-rc. Reported by "oftc_must_be_destroyed".
24509 - Downgrade an assertion in connection_ap_expire_beginning to an
24510 LD_BUG message. The fix for bug 8024 should prevent this message
24511 from displaying, but just in case, a warn that we can diagnose
24512 is better than more assert crashes. Fixes bug 8065; bugfix on
24514 - Lower path use bias thresholds to .80 for notice and .60 for warn.
24515 Also make the rate limiting flags for the path use bias log messages
24516 independent from the original path bias flags. Fixes bug 8161;
24517 bugfix on 0.2.4.10-alpha.
24519 o Minor bugfixes (relays):
24520 - Stop trying to resolve our hostname so often (e.g. every time we
24521 think about doing a directory fetch). Now we reuse the cached
24522 answer in some cases. Fixes bugs 1992 (bugfix on 0.2.0.20-rc)
24523 and 2410 (bugfix on 0.1.2.2-alpha).
24524 - Stop sending a stray "(null)" in some cases for the server status
24525 "EXTERNAL_ADDRESS" controller event. Resolves bug 8200; bugfix
24527 - When choosing which stream on a formerly stalled circuit to wake
24528 first, make better use of the platform's weak RNG. Previously,
24529 we had been using the % ("modulo") operator to try to generate a
24530 1/N chance of picking each stream, but this behaves badly with
24531 many platforms' choice of weak RNG. Fixes bug 7801; bugfix on
24533 - Use our own weak RNG when we need a weak RNG. Windows's rand() and
24534 Irix's random() only return 15 bits; Solaris's random() returns more
24535 bits but its RAND_MAX says it only returns 15, and so on. Motivated
24536 by the fix for bug 7801; bugfix on 0.2.2.20-alpha.
24538 o Minor bugfixes (directory authorities):
24539 - Directory authorities now use less space when formatting identical
24540 microdescriptor lines in directory votes. Fixes bug 8158; bugfix
24543 o Minor bugfixes (memory leaks spotted by Coverity -- bug 7816):
24544 - Avoid leaking memory if we fail to compute a consensus signature
24545 or we generate a consensus we can't parse. Bugfix on 0.2.0.5-alpha.
24546 - Fix a memory leak when receiving headers from an HTTPS proxy. Bugfix
24548 - Fix a memory leak during safe-cookie controller authentication.
24549 Bugfix on 0.2.3.13-alpha.
24550 - Avoid memory leak of IPv6 policy content if we fail to format it into
24551 a router descriptor. Bugfix on 0.2.4.7-alpha.
24553 o Minor bugfixes (other code correctness issues):
24554 - Avoid a crash if we fail to generate an extrainfo descriptor.
24555 Fixes bug 8208; bugfix on 0.2.3.16-alpha. Found by Coverity;
24556 this is CID 718634.
24557 - When detecting the largest possible file descriptor (in order to
24558 close all file descriptors when launching a new program), actually
24559 use _SC_OPEN_MAX. The old code for doing this was very, very broken.
24560 Fixes bug 8209; bugfix on 0.2.3.1-alpha. Found by Coverity; this
24562 - Fix a copy-and-paste error when adding a missing A1 to a routerset
24563 because of GeoIPExcludeUnknown. Fix for Coverity CID 980650.
24564 Bugfix on 0.2.4.10-alpha.
24565 - Fix an impossible-to-trigger integer overflow when estimating how
24566 long our onionskin queue would take. (This overflow would require us
24567 to accept 4 million onionskins before processing 100 of them.) Fixes
24568 bug 8210; bugfix on 0.2.4.10-alpha.
24570 o Code simplification and refactoring:
24571 - Add a wrapper function for the common "log a message with a
24575 Changes in version 0.2.4.10-alpha - 2013-02-04
24576 Tor 0.2.4.10-alpha adds defenses at the directory authority level from
24577 certain attacks that flood the network with relays; changes the queue
24578 for circuit create requests from a sized-based limit to a time-based
24579 limit; resumes building with MSVC on Windows; and fixes a wide variety
24582 o Major bugfixes (directory authority):
24583 - When computing directory thresholds, ignore any rejected-as-sybil
24584 nodes during the computation so that they can't influence Fast,
24585 Guard, etc. (We should have done this for proposal 109.) Fixes
24587 - When marking a node as a likely sybil, reset its uptime metrics
24588 to zero, so that it cannot time towards getting marked as Guard,
24589 Stable, or HSDir. (We should have done this for proposal 109.) Fixes
24593 - When a TLS write is partially successful but incomplete, remember
24594 that the flushed part has been flushed, and notice that bytes were
24595 actually written. Reported and fixed pseudonymously. Fixes bug
24596 7708; bugfix on Tor 0.1.0.5-rc.
24597 - Reject bogus create and relay cells with 0 circuit ID or 0 stream
24598 ID: these could be used to create unexpected streams and circuits
24599 which would count as "present" to some parts of Tor but "absent"
24600 to others, leading to zombie circuits and streams or to a bandwidth
24601 denial-of-service. Fixes bug 7889; bugfix on every released version
24602 of Tor. Reported by "oftc_must_be_destroyed".
24603 - Rename all macros in our local copy of queue.h to begin with "TOR_".
24604 This change seems the only good way to permanently prevent conflicts
24605 with queue.h on various operating systems. Fixes bug 8107; bugfix
24608 o Major features (relay):
24609 - Instead of limiting the number of queued onionskins (aka circuit
24610 create requests) to a fixed, hard-to-configure number, we limit
24611 the size of the queue based on how many we expect to be able to
24612 process in a given amount of time. We estimate the time it will
24613 take to process an onionskin based on average processing time
24614 of previous onionskins. Closes ticket 7291. You'll never have to
24615 configure MaxOnionsPending again.
24617 o Major features (portability):
24618 - Resume building correctly with MSVC and Makefile.nmake. This patch
24619 resolves numerous bugs and fixes reported by ultramage, including
24620 7305, 7308, 7309, 7310, 7312, 7313, 7315, 7316, and 7669.
24621 - Make the ntor and curve25519 code build correctly with MSVC.
24622 Fix on 0.2.4.8-alpha.
24625 - When directory authorities are computing thresholds for flags,
24626 never let the threshold for the Fast flag fall below 4096
24627 bytes. Also, do not consider nodes with extremely low bandwidths
24628 when deciding thresholds for various directory flags. This change
24629 should raise our threshold for Fast relays, possibly in turn
24630 improving overall network performance; see ticket 1854. Resolves
24632 - The Tor client now ignores sub-domain components of a .onion
24633 address. This change makes HTTP "virtual" hosting
24634 possible: http://foo.aaaaaaaaaaaaaaaa.onion/ and
24635 http://bar.aaaaaaaaaaaaaaaa.onion/ can be two different websites
24636 hosted on the same hidden service. Implements proposal 204.
24637 - We compute the overhead from passing onionskins back and forth to
24638 cpuworkers, and report it when dumping statistics in response to
24639 SIGUSR1. Supports ticket 7291.
24641 o Minor features (path selection):
24642 - When deciding whether we have enough descriptors to build circuits,
24643 instead of looking at raw relay counts, look at which fraction
24644 of (bandwidth-weighted) paths we're able to build. This approach
24645 keeps clients from building circuits if their paths are likely to
24646 stand out statistically. The default fraction of paths needed is
24647 taken from the consensus directory; you can override it with the
24648 new PathsNeededToBuildCircuits option. Fixes ticket 5956.
24649 - When any country code is listed in ExcludeNodes or ExcludeExitNodes,
24650 and we have GeoIP information, also exclude all nodes with unknown
24651 countries "??" and "A1". This behavior is controlled by the
24652 new GeoIPExcludeUnknown option: you can make such nodes always
24653 excluded with "GeoIPExcludeUnknown 1", and disable the feature
24654 with "GeoIPExcludeUnknown 0". Setting "GeoIPExcludeUnknown auto"
24655 gets you the default behavior. Implements feature 7706.
24656 - Path Use Bias: Perform separate accounting for successful circuit
24657 use. Keep separate statistics on stream attempt rates versus stream
24658 success rates for each guard. Provide configurable thresholds to
24659 determine when to emit log messages or disable use of guards that
24660 fail too many stream attempts. Resolves ticket 7802.
24662 o Minor features (log messages):
24663 - When learning a fingerprint for a bridge, log its corresponding
24664 transport type. Implements ticket 7896.
24665 - Improve the log message when "Bug/attack: unexpected sendme cell
24666 from client" occurs, to help us track bug 8093.
24669 - Remove a couple of extraneous semicolons that were upsetting the
24670 cparser library. Patch by Christian Grothoff. Fixes bug 7115;
24671 bugfix on 0.2.2.1-alpha.
24672 - Remove a source of rounding error during path bias count scaling;
24673 don't count cannibalized circuits as used for path bias until we
24674 actually try to use them; and fix a circuit_package_relay_cell()
24675 warning message about n_chan==NULL. Fixes bug 7802.
24676 - Detect nacl when its headers are in a nacl/ subdirectory. Also,
24677 actually link against nacl when we're configured to use it. Fixes
24678 bug 7972; bugfix on 0.2.4.8-alpha.
24679 - Compile correctly with the --disable-curve25519 option. Fixes
24680 bug 8153; bugfix on 0.2.4.8-alpha.
24682 o Build improvements:
24683 - Do not report status verbosely from autogen.sh unless the -v flag
24684 is specified. Fixes issue 4664. Patch from Onizuka.
24685 - Replace all calls to snprintf() outside of src/ext with
24686 tor_snprintf(). Also remove the #define to replace snprintf with
24687 _snprintf on Windows; they have different semantics, and all of
24688 our callers should be using tor_snprintf() anyway. Fixes bug 7304.
24689 - Try to detect if we are ever building on a platform where
24690 memset(...,0,...) does not set the value of a double to 0.0. Such
24691 platforms are permitted by the C standard, though in practice
24692 they're pretty rare (since IEEE 754 is nigh-ubiquitous). We don't
24693 currently support them, but it's better to detect them and fail
24694 than to perform erroneously.
24696 o Removed features:
24697 - Stop exporting estimates of v2 and v3 directory traffic shares
24698 in extrainfo documents. They were unneeded and sometimes inaccurate.
24699 Also stop exporting any v2 directory request statistics. Resolves
24701 - Drop support for detecting and warning about versions of Libevent
24702 before 1.3e. Nothing reasonable ships with them any longer;
24703 warning the user about them shouldn't be needed. Resolves ticket
24706 o Code simplifications and refactoring:
24707 - Rename "isin" functions to "contains", for grammar. Resolves
24709 - Rename Tor's logging function log() to tor_log(), to avoid conflicts
24710 with the natural logarithm function from the system libm. Resolves
24714 Changes in version 0.2.4.9-alpha - 2013-01-15
24715 Tor 0.2.4.9-alpha provides a quick fix to make the new ntor handshake
24716 work more robustly.
24719 - Fix backward compatibility logic when receiving an embedded ntor
24720 handshake tunneled in a CREATE cell. This clears up the "Bug:
24721 couldn't format CREATED cell" warning. Fixes bug 7959; bugfix
24725 Changes in version 0.2.4.8-alpha - 2013-01-14
24726 Tor 0.2.4.8-alpha introduces directory guards to reduce user enumeration
24727 risks, adds a new stronger and faster circuit handshake, and offers
24728 stronger and faster link encryption when both sides support it.
24731 - Preliminary support for directory guards (proposal 207): when
24732 possible, clients now use their entry guards for non-anonymous
24733 directory requests. This can help prevent client enumeration. Note
24734 that this behavior only works when we have a usable consensus
24735 directory, and when options about what to download are more or less
24736 standard. In the future we should re-bootstrap from our guards,
24737 rather than re-bootstrapping from the preconfigured list of
24738 directory sources that ships with Tor. Resolves ticket 6526.
24739 - Tor relays and clients now support a better CREATE/EXTEND cell
24740 format, allowing the sender to specify multiple address, identity,
24741 and handshake types. Implements Robert Ransom's proposal 200;
24742 closes ticket 7199.
24744 o Major features (new circuit handshake):
24745 - Tor now supports a new circuit extension handshake designed by Ian
24746 Goldberg, Douglas Stebila, and Berkant Ustaoglu. Our original
24747 circuit extension handshake, later called "TAP", was a bit slow
24748 (especially on the relay side), had a fragile security proof, and
24749 used weaker keys than we'd now prefer. The new circuit handshake
24750 uses Dan Bernstein's "curve25519" elliptic-curve Diffie-Hellman
24751 function, making it significantly more secure than the older
24752 handshake, and significantly faster. Tor can use one of two built-in
24753 pure-C curve25519-donna implementations by Adam Langley, or it
24754 can link against the "nacl" library for a tuned version if present.
24756 The built-in version is very fast for 64-bit systems when building
24757 with GCC. The built-in 32-bit version is still faster than the
24758 old TAP protocol, but using libnacl is better on most such hosts.
24760 Clients don't currently use this protocol by default, since
24761 comparatively few clients support it so far. To try it, set
24762 UseNTorHandshake to 1.
24764 Implements proposal 216; closes ticket 7202.
24766 o Major features (better link encryption):
24767 - Relays can now enable the ECDHE TLS ciphersuites when available
24768 and appropriate. These ciphersuites let us negotiate forward-secure
24769 TLS secret keys more safely and more efficiently than with our
24770 previous use of Diffie-Hellman modulo a 1024-bit prime. By default,
24771 public relays prefer the (faster) P224 group, and bridges prefer
24772 the (more common) P256 group; you can override this with the
24775 Enabling these ciphers was a little tricky, since for a long time,
24776 clients had been claiming to support them without actually doing
24777 so, in order to foil fingerprinting. But with the client-side
24778 implementation of proposal 198 in 0.2.3.17-beta, clients can now
24779 match the ciphers from recent Firefox versions *and* list the
24780 ciphers they actually mean, so relays can believe such clients
24781 when they advertise ECDHE support in their TLS ClientHello messages.
24783 This feature requires clients running 0.2.3.17-beta or later,
24784 and requires both sides to be running OpenSSL 1.0.0 or later
24785 with ECC support. OpenSSL 1.0.1, with the compile-time option
24786 "enable-ec_nistp_64_gcc_128", is highly recommended.
24788 Implements the relay side of proposal 198; closes ticket 7200.
24791 - Avoid crashing when, as a relay without IPv6-exit support, a
24792 client insists on getting an IPv6 address or nothing. Fixes bug
24793 7814; bugfix on 0.2.4.7-alpha.
24796 - Improve circuit build timeout handling for hidden services.
24797 In particular: adjust build timeouts more accurately depending
24798 upon the number of hop-RTTs that a particular circuit type
24799 undergoes. Additionally, launch intro circuits in parallel
24800 if they timeout, and take the first one to reply as valid.
24801 - Work correctly on Unix systems where EAGAIN and EWOULDBLOCK are
24802 separate error codes; or at least, don't break for that reason.
24803 Fixes bug 7935. Reported by "oftc_must_be_destroyed".
24804 - Update to the January 2 2013 Maxmind GeoLite Country database.
24806 o Minor features (testing):
24807 - Add benchmarks for DH (1024-bit multiplicative group) and ECDH
24808 (P-256) Diffie-Hellman handshakes to src/or/bench.
24809 - Add benchmark functions to test onion handshake performance.
24811 o Minor features (path bias detection):
24812 - Alter the Path Bias log messages to be more descriptive in terms
24813 of reporting timeouts and other statistics.
24814 - Create three levels of Path Bias log messages, as opposed to just
24815 two. These are configurable via consensus as well as via the torrc
24816 options PathBiasNoticeRate, PathBiasWarnRate, PathBiasExtremeRate.
24817 The default values are 0.70, 0.50, and 0.30 respectively.
24818 - Separate the log message levels from the decision to drop guards,
24819 which also is available via torrc option PathBiasDropGuards.
24820 PathBiasDropGuards still defaults to 0 (off).
24821 - Deprecate PathBiasDisableRate in favor of PathBiasDropGuards
24822 in combination with PathBiasExtremeRate.
24823 - Increase the default values for PathBiasScaleThreshold and
24824 PathBiasCircThreshold from (200, 20) to (300, 150).
24825 - Add in circuit usage accounting to path bias. If we try to use a
24826 built circuit but fail for any reason, it counts as path bias.
24827 Certain classes of circuits where the adversary gets to pick your
24828 destination node are exempt from this accounting. Usage accounting
24829 can be specifically disabled via consensus parameter or torrc.
24830 - Convert all internal path bias state to double-precision floating
24831 point, to avoid roundoff error and other issues.
24832 - Only record path bias information for circuits that have completed
24833 *two* hops. Assuming end-to-end tagging is the attack vector, this
24834 makes us more resilient to ambient circuit failure without any
24835 detection capability loss.
24837 o Minor bugfixes (log messages):
24838 - Rate-limit the "No circuits are opened. Relaxed timeout for a
24839 circuit with channel state open..." message to once per hour to
24840 keep it from filling the notice logs. Mitigates bug 7799 but does
24841 not fix the underlying cause. Bugfix on 0.2.4.7-alpha.
24842 - Avoid spurious warnings when configuring multiple client ports of
24843 which only some are nonlocal. Previously, we had claimed that some
24844 were nonlocal when in fact they weren't. Fixes bug 7836; bugfix on
24847 o Code simplifications and refactoring:
24848 - Get rid of a couple of harmless clang warnings, where we compared
24849 enums to ints. These warnings are newly introduced in clang 3.2.
24850 - Split the onion.c file into separate modules for the onion queue
24851 and the different handshakes it supports.
24852 - Remove the marshalling/unmarshalling code for sending requests to
24853 cpuworkers over a socket, and instead just send structs. The
24854 recipient will always be the same Tor binary as the sender, so
24855 any encoding is overkill.
24858 Changes in version 0.2.4.7-alpha - 2012-12-24
24859 Tor 0.2.4.7-alpha introduces a new approach to providing fallback
24860 directory mirrors for more robust bootstrapping; fixes more issues where
24861 clients with changing network conditions refuse to make any circuits;
24862 adds initial support for exiting to IPv6 addresses; resumes being able
24863 to update our GeoIP database, and includes the geoip6 file this time;
24864 turns off the client-side DNS cache by default due to privacy risks;
24865 and fixes a variety of other issues.
24867 o Major features (client resilience):
24868 - Add a new "FallbackDir" torrc option to use when we can't use
24869 a directory mirror from the consensus (either because we lack a
24870 consensus, or because they're all down). Currently, all authorities
24871 are fallbacks by default, and there are no other default fallbacks,
24872 but that will change. This option will allow us to give clients a
24873 longer list of servers to try to get a consensus from when first
24874 connecting to the Tor network, and thereby reduce load on the
24875 directory authorities. Implements proposal 206, "Preconfigured
24876 directory sources for bootstrapping". We also removed the old
24877 "FallbackNetworkstatus" option, since we never got it working well
24878 enough to use it. Closes bug 572.
24879 - If we have no circuits open, use a relaxed timeout (the
24880 95-percentile cutoff) until a circuit succeeds. This heuristic
24881 should allow Tor to succeed at building circuits even when the
24882 network connection drastically changes. Should help with bug 3443.
24884 o Major features (IPv6):
24885 - Relays can now exit to IPv6 addresses: make sure that you have IPv6
24886 connectivity, then set the IPv6Exit flag to 1. Also make sure your
24887 exit policy reads as you would like: the address * applies to all
24888 address families, whereas *4 is IPv4 address only, and *6 is IPv6
24889 addresses only. On the client side, you'll need to wait until the
24890 authorities have upgraded, wait for enough exits to support IPv6,
24891 apply the "IPv6Traffic" flag to a SocksPort, and use Socks5. Closes
24892 ticket 5547, implements proposal 117 as revised in proposal 208.
24894 We DO NOT recommend that clients with actual anonymity needs start
24895 using IPv6 over Tor yet, since not enough exits support it yet.
24897 o Major features (geoip database):
24898 - Maxmind began labelling Tor relays as being in country "A1",
24899 which breaks by-country node selection inside Tor. Now we use a
24900 script to replace "A1" ("Anonymous Proxy") entries in our geoip
24901 file with real country codes. This script fixes about 90% of "A1"
24902 entries automatically and uses manual country code assignments to
24903 fix the remaining 10%. See src/config/README.geoip for details.
24904 Fixes bug 6266. Also update to the December 5 2012 Maxmind GeoLite
24905 Country database, as modified above.
24907 o Major bugfixes (client-side DNS):
24908 - Turn off the client-side DNS cache by default. Updating and using
24909 the DNS cache is now configurable on a per-client-port
24910 level. SOCKSPort, DNSPort, etc lines may now contain
24911 {No,}Cache{IPv4,IPv6,}DNS lines to indicate that we shouldn't
24912 cache these types of DNS answers when we receive them from an
24913 exit node in response to an application request on this port, and
24914 {No,}UseCached{IPv4,IPv6,DNS} lines to indicate that if we have
24915 cached DNS answers of these types, we shouldn't use them. It's
24916 potentially risky to use cached DNS answers at the client, since
24917 doing so can indicate to one exit what answers we've gotten
24918 for DNS lookups in the past. With IPv6, this becomes especially
24919 problematic. Using cached DNS answers for requests on the same
24920 circuit would present less linkability risk, since all traffic
24921 on a circuit is already linkable, but it would also provide
24922 little performance benefit: the exit node caches DNS replies
24923 too. Implements a simplified version of Proposal 205. Implements
24926 o Major bugfixes (other):
24927 - Alter circuit build timeout measurement to start at the point
24928 where we begin the CREATE/CREATE_FAST step (as opposed to circuit
24929 initialization). This should make our timeout measurements more
24930 uniform. Previously, we were sometimes including ORconn setup time
24931 in our circuit build time measurements. Should resolve bug 3443.
24932 - Fix an assertion that could trigger in hibernate_go_dormant() when
24933 closing an or_connection_t: call channel_mark_for_close() rather
24934 than connection_mark_for_close(). Fixes bug 7267. Bugfix on
24936 - Include the geoip6 IPv6 GeoIP database in the tarball. Fixes bug
24937 7655; bugfix on 0.2.4.6-alpha.
24940 - Add a new torrc option "ServerTransportListenAddr" to let bridge
24941 operators select the address where their pluggable transports will
24942 listen for connections. Resolves ticket 7013.
24943 - Allow an optional $ before the node identity digest in the
24944 controller command GETINFO ns/id/<identity>, for consistency with
24945 md/id/<identity> and desc/id/<identity>. Resolves ticket 7059.
24946 - Log packaged cell fullness as part of the heartbeat message.
24947 Diagnosis to try to determine the extent of bug 7743.
24949 o Minor features (IPv6):
24950 - AutomapHostsOnResolve now supports IPv6 addresses. By default, we
24951 prefer to hand out virtual IPv6 addresses, since there are more of
24952 them and we can't run out. To override this behavior and make IPv4
24953 addresses preferred, set NoPreferIPv6Automap on whatever SOCKSPort
24954 or DNSPort you're using for resolving. Implements ticket 7571.
24955 - AutomapHostsOnResolve responses are now randomized, to avoid
24956 annoying situations where Tor is restarted and applications
24957 connect to the wrong addresses.
24958 - Never try more than 1000 times to pick a new virtual address when
24959 AutomapHostsOnResolve is set. That's good enough so long as we
24960 aren't close to handing out our entire virtual address space;
24961 if you're getting there, it's best to switch to IPv6 virtual
24965 - The ADDRMAP command can no longer generate an ill-formed error
24966 code on a failed MAPADDRESS. It now says "internal" rather than
24967 an English sentence fragment with spaces in the middle. Bugfix on
24968 Tor 0.2.0.19-alpha.
24969 - Fix log messages and comments to avoid saying "GMT" when we mean
24970 "UTC". Fixes bug 6113.
24971 - Compile on win64 using mingw64. Fixes bug 7260; patches from
24973 - Fix a crash when debugging unit tests on Windows: deallocate a
24974 shared library with FreeLibrary, not CloseHandle. Fixes bug 7306;
24975 bugfix on 0.2.2.17-alpha. Reported by "ultramage".
24978 - The DirServer option is now DirAuthority, for consistency with
24979 current naming patterns. You can still use the old DirServer form.
24981 o Code simplification and refactoring:
24982 - Move the client-side address-map/virtual-address/DNS-cache code
24983 out of connection_edge.c into a new addressmap.c module.
24984 - Remove unused code for parsing v1 directories and "running routers"
24985 documents. Fixes bug 6887.
24988 Changes in version 0.2.3.25 - 2012-11-19
24989 The Tor 0.2.3 release series is dedicated to the memory of Len "rabbi"
24990 Sassaman (1980-2011), a long-time cypherpunk, anonymity researcher,
24991 Mixmaster maintainer, Pynchon Gate co-designer, CodeCon organizer,
24992 programmer, and friend. Unstinting in his dedication to the cause of
24993 freedom, he inspired and helped many of us as we began our work on
24994 anonymity, and inspires us still. Please honor his memory by writing
24995 software to protect people's freedoms, and by helping others to do so.
24997 Tor 0.2.3.25, the first stable release in the 0.2.3 branch, features
24998 significantly reduced directory overhead (via microdescriptors),
24999 enormous crypto performance improvements for fast relays on new
25000 enough hardware, a new v3 TLS handshake protocol that can better
25001 resist fingerprinting, support for protocol obfuscation plugins (aka
25002 pluggable transports), better scalability for hidden services, IPv6
25003 support for bridges, performance improvements like allowing clients
25004 to skip the first round-trip on the circuit ("optimistic data") and
25005 refilling token buckets more often, a new "stream isolation" design
25006 to isolate different applications on different circuits, and many
25007 stability, security, and privacy fixes.
25010 - Tor tries to wipe potentially sensitive data after using it, so
25011 that if some subsequent security failure exposes Tor's memory,
25012 the damage will be limited. But we had a bug where the compiler
25013 was eliminating these wipe operations when it decided that the
25014 memory was no longer visible to a (correctly running) program,
25015 hence defeating our attempt at defense in depth. We fix that
25016 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
25017 is unlikely to optimize away. Future versions of Tor may use
25018 a less ridiculously heavy approach for this. Fixes bug 7352.
25019 Reported in an article by Andrey Karpov.
25022 - Fix a harmless bug when opting against publishing a relay descriptor
25023 because DisableNetwork is set. Fixes bug 7464; bugfix on
25027 Changes in version 0.2.4.6-alpha - 2012-11-13
25028 Tor 0.2.4.6-alpha fixes an assert bug that has been plaguing relays,
25029 makes our defense-in-depth memory wiping more reliable, and begins to
25030 count IPv6 addresses in bridge statistics,
25033 - Fix an assertion failure that could occur when closing a connection
25034 with a spliced rendezvous circuit. Fix for bug 7212; bugfix on
25036 - Tor tries to wipe potentially sensitive data after using it, so
25037 that if some subsequent security failure exposes Tor's memory,
25038 the damage will be limited. But we had a bug where the compiler
25039 was eliminating these wipe operations when it decided that the
25040 memory was no longer visible to a (correctly running) program,
25041 hence defeating our attempt at defense in depth. We fix that
25042 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
25043 is unlikely to optimize away. Future versions of Tor may use
25044 a less ridiculously heavy approach for this. Fixes bug 7352.
25045 Reported in an article by Andrey Karpov.
25048 - Add GeoIP database for IPv6 addresses. The new config option
25050 - Bridge statistics now count bridge clients connecting over IPv6:
25051 bridge statistics files now list "bridge-ip-versions" and
25052 extra-info documents list "geoip6-db-digest". The control protocol
25053 "CLIENTS_SEEN" and "ip-to-country" queries now support IPv6. Initial
25054 implementation by "shkoo", addressing ticket 5055.
25057 - Warn when we are binding low ports when hibernation is enabled;
25058 previously we had warned when we were _advertising_ low ports with
25059 hibernation enabled. Fixes bug 7285; bugfix on 0.2.3.9-alpha.
25060 - Fix a harmless bug when opting against publishing a relay descriptor
25061 because DisableNetwork is set. Fixes bug 7464; bugfix on
25063 - Add warning message when a managed proxy dies during configuration.
25064 Fixes bug 7195; bugfix on 0.2.4.2-alpha.
25065 - Fix a linking error when building tor-fw-helper without miniupnp.
25066 Fixes bug 7235; bugfix on 0.2.4.2-alpha. Fix by Anthony G. Basile.
25067 - Check for closing an or_connection_t without going through correct
25068 channel functions; emit a warning and then call
25069 connection_or_close_for_error() so we don't assert as in bugs 7212
25071 - Compile correctly on compilers without C99 designated initializer
25072 support. Fixes bug 7286; bugfix on 0.2.4.4-alpha.
25073 - Avoid a possible assert that can occur when channel_send_destroy() is
25074 called on a channel in CHANNEL_STATE_CLOSING, CHANNEL_STATE_CLOSED,
25075 or CHANNEL_STATE_ERROR when the Tor process is resumed after being
25076 blocked for a long interval. Fixes bug 7350; bugfix on 0.2.4.4-alpha.
25077 - Fix a memory leak on failing cases of channel_tls_process_certs_cell.
25078 Fixes bug 7422; bugfix on 0.2.4.4-alpha.
25080 o Code simplification and refactoring:
25081 - Start using OpenBSD's implementation of queue.h, so that we don't
25082 need to hand-roll our own pointer and list structures whenever we
25083 need them. (We can't rely on a sys/queue.h, since some operating
25084 systems don't have them, and the ones that do have them don't all
25085 present the same extensions.)
25088 Changes in version 0.2.4.5-alpha - 2012-10-25
25089 Tor 0.2.4.5-alpha comes hard at the heels of 0.2.4.4-alpha, to fix
25090 two important security vulnerabilities that could lead to remotely
25091 triggerable relay crashes, fix a major bug that was preventing clients
25092 from choosing suitable exit nodes, and refactor some of our code.
25094 o Major bugfixes (security, also in 0.2.3.24-rc):
25095 - Fix a group of remotely triggerable assertion failures related to
25096 incorrect link protocol negotiation. Found, diagnosed, and fixed
25097 by "some guy from France". Fix for CVE-2012-2250; bugfix on
25099 - Fix a denial of service attack by which any directory authority
25100 could crash all the others, or by which a single v2 directory
25101 authority could crash everybody downloading v2 directory
25102 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
25104 o Major bugfixes (also in 0.2.3.24-rc):
25105 - When parsing exit policy summaries from microdescriptors, we had
25106 previously been ignoring the last character in each one, so that
25107 "accept 80,443,8080" would be treated by clients as indicating
25108 a node that allows access to ports 80, 443, and 808. That would
25109 lead to clients attempting connections that could never work,
25110 and ignoring exit nodes that would support their connections. Now
25111 clients parse these exit policy summaries correctly. Fixes bug 7192;
25112 bugfix on 0.2.3.1-alpha.
25114 o Minor bugfixes (also in 0.2.3.24-rc):
25115 - Clients now consider the ClientRejectInternalAddresses config option
25116 when using a microdescriptor consensus stanza to decide whether
25117 an exit relay would allow exiting to an internal address. Fixes
25118 bug 7190; bugfix on 0.2.3.1-alpha.
25121 - Only disable TLS session ticket support when running as a TLS
25122 server. Now clients will blend better with regular Firefox
25123 connections. Fixes bug 7189; bugfix on Tor 0.2.3.23-rc.
25125 o Code simplification and refactoring:
25126 - Start using OpenBSD's implementation of queue.h (originally by
25128 - Move the entry node code from circuitbuild.c to its own file.
25129 - Move the circuit build timeout tracking code from circuitbuild.c
25133 Changes in version 0.2.3.24-rc - 2012-10-25
25134 Tor 0.2.3.24-rc fixes two important security vulnerabilities that
25135 could lead to remotely triggerable relay crashes, and fixes
25136 a major bug that was preventing clients from choosing suitable exit
25139 o Major bugfixes (security):
25140 - Fix a group of remotely triggerable assertion failures related to
25141 incorrect link protocol negotiation. Found, diagnosed, and fixed
25142 by "some guy from France". Fix for CVE-2012-2250; bugfix on
25144 - Fix a denial of service attack by which any directory authority
25145 could crash all the others, or by which a single v2 directory
25146 authority could crash everybody downloading v2 directory
25147 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
25150 - When parsing exit policy summaries from microdescriptors, we had
25151 previously been ignoring the last character in each one, so that
25152 "accept 80,443,8080" would be treated by clients as indicating
25153 a node that allows access to ports 80, 443, and 808. That would
25154 lead to clients attempting connections that could never work,
25155 and ignoring exit nodes that would support their connections. Now
25156 clients parse these exit policy summaries correctly. Fixes bug 7192;
25157 bugfix on 0.2.3.1-alpha.
25160 - Clients now consider the ClientRejectInternalAddresses config option
25161 when using a microdescriptor consensus stanza to decide whether
25162 an exit relay would allow exiting to an internal address. Fixes
25163 bug 7190; bugfix on 0.2.3.1-alpha.
25166 Changes in version 0.2.4.4-alpha - 2012-10-20
25167 Tor 0.2.4.4-alpha adds a new v3 directory authority, fixes a privacy
25168 vulnerability introduced by a change in OpenSSL, fixes a remotely
25169 triggerable assert, and adds new channel_t and circuitmux_t abstractions
25170 that will make it easier to test new connection transport and cell
25171 scheduling algorithms.
25173 o New directory authorities (also in 0.2.3.23-rc):
25174 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
25175 authority. Closes ticket 5749.
25177 o Major bugfixes (security/privacy, also in 0.2.3.23-rc):
25178 - Disable TLS session tickets. OpenSSL's implementation was giving
25179 our TLS session keys the lifetime of our TLS context objects, when
25180 perfect forward secrecy would want us to discard anything that
25181 could decrypt a link connection as soon as the link connection
25182 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
25183 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
25184 - Discard extraneous renegotiation attempts once the V3 link
25185 protocol has been initiated. Failure to do so left us open to
25186 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
25187 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
25189 o Internal abstraction features:
25190 - Introduce new channel_t abstraction between circuits and
25191 or_connection_t to allow for implementing alternate OR-to-OR
25192 transports. A channel_t is an abstract object which can either be a
25193 cell-bearing channel, which is responsible for authenticating and
25194 handshaking with the remote OR and transmitting cells to and from
25195 it, or a listening channel, which spawns new cell-bearing channels
25196 at the request of remote ORs. Implements part of ticket 6465.
25197 - Also new is the channel_tls_t subclass of channel_t, adapting it
25198 to the existing or_connection_t code. The V2/V3 protocol handshaking
25199 code which formerly resided in command.c has been moved below the
25200 channel_t abstraction layer and may be found in channeltls.c now.
25201 Implements the rest of ticket 6465.
25202 - Introduce new circuitmux_t storing the queue of circuits for
25203 a channel; this encapsulates and abstracts the queue logic and
25204 circuit selection policy, and allows the latter to be overridden
25205 easily by switching out a policy object. The existing EWMA behavior
25206 is now implemented as a circuitmux_policy_t. Resolves ticket 6816.
25208 o Required libraries:
25209 - Tor now requires OpenSSL 0.9.8 or later. OpenSSL 1.0.0 or later is
25210 strongly recommended.
25213 - Warn users who run hidden services on a Tor client with
25214 UseEntryGuards disabled that their hidden services will be
25215 vulnerable to http://freehaven.net/anonbib/#hs-attack06 (the
25216 attack which motivated Tor to support entry guards in the first
25217 place). Resolves ticket 6889.
25218 - Tor now builds correctly on Bitrig, an OpenBSD fork. Patch from
25219 dhill. Resolves ticket 6982.
25220 - Option OutboundBindAddress can be specified multiple times and
25221 accepts IPv6 addresses. Resolves ticket 6876.
25223 o Minor bugfixes (also in 0.2.3.23-rc):
25224 - Don't serve or accept v2 hidden service descriptors over a
25225 relay's DirPort. It's never correct to do so, and disabling it
25226 might make it more annoying to exploit any bugs that turn up in the
25227 descriptor-parsing code. Fixes bug 7149.
25228 - Fix two cases in src/or/transports.c where we were calling
25229 fmt_addr() twice in a parameter list. Bug found by David
25230 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
25231 - Fix memory leaks whenever we logged any message about the "path
25232 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
25233 - When relays refuse a "create" cell because their queue of pending
25234 create cells is too big (typically because their cpu can't keep up
25235 with the arrival rate), send back reason "resource limit" rather
25236 than reason "internal", so network measurement scripts can get a
25237 more accurate picture. Fixes bug 7037; bugfix on 0.1.1.11-alpha.
25240 - Command-line option "--version" implies "--quiet". Fixes bug 6997.
25241 - Free some more still-in-use memory at exit, to make hunting for
25242 memory leaks easier. Resolves bug 7029.
25243 - When a Tor client gets a "truncated" relay cell, the first byte of
25244 its payload specifies why the circuit was truncated. We were
25245 ignoring this 'reason' byte when tearing down the circuit, resulting
25246 in the controller not being told why the circuit closed. Now we
25247 pass the reason from the truncated cell to the controller. Bugfix
25248 on 0.1.2.3-alpha; fixes bug 7039.
25249 - Downgrade "Failed to hand off onionskin" messages to "debug"
25250 severity, since they're typically redundant with the "Your computer
25251 is too slow" messages. Fixes bug 7038; bugfix on 0.2.2.16-alpha.
25252 - Make clients running with IPv6 bridges connect over IPv6 again,
25253 even without setting new config options ClientUseIPv6 and
25254 ClientPreferIPv6ORPort. Fixes bug 6757; bugfix on 0.2.4.1-alpha.
25255 - Use square brackets around IPv6 addresses in numerous places
25256 that needed them, including log messages, HTTPS CONNECT proxy
25257 requests, TransportProxy statefile entries, and pluggable transport
25258 extra-info lines. Fixes bug 7011; patch by David Fifield.
25260 o Code refactoring and cleanup:
25261 - Source files taken from other packages now reside in src/ext;
25262 previously they were scattered around the rest of Tor.
25263 - Avoid use of reserved identifiers in our C code. The C standard
25264 doesn't like us declaring anything that starts with an
25265 underscore, so let's knock it off before we get in trouble. Fix
25266 for bug 1031; bugfix on the first Tor commit.
25269 Changes in version 0.2.3.23-rc - 2012-10-20
25270 Tor 0.2.3.23-rc adds a new v3 directory authority, fixes a privacy
25271 vulnerability introduced by a change in OpenSSL, and fixes a variety
25272 of smaller bugs in preparation for the release.
25274 o New directory authorities:
25275 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
25276 authority. Closes ticket 5749.
25278 o Major bugfixes (security/privacy):
25279 - Disable TLS session tickets. OpenSSL's implementation was giving
25280 our TLS session keys the lifetime of our TLS context objects, when
25281 perfect forward secrecy would want us to discard anything that
25282 could decrypt a link connection as soon as the link connection
25283 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
25284 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
25285 - Discard extraneous renegotiation attempts once the V3 link
25286 protocol has been initiated. Failure to do so left us open to
25287 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
25288 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
25291 - Fix a possible crash bug when checking for deactivated circuits
25292 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
25293 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
25295 o Minor bugfixes (on 0.2.3.x):
25296 - Fix two cases in src/or/transports.c where we were calling
25297 fmt_addr() twice in a parameter list. Bug found by David
25298 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
25299 - Convert an assert in the pathbias code to a log message. The assert
25300 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
25301 bugfix on 0.2.3.17-beta.
25302 - Fix memory leaks whenever we logged any message about the "path
25303 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
25305 o Minor bugfixes (on 0.2.2.x and earlier):
25306 - Don't serve or accept v2 hidden service descriptors over a relay's
25307 DirPort. It's never correct to do so, and disabling it might
25308 make it more annoying to exploit any bugs that turn up in the
25309 descriptor-parsing code. Fixes bug 7149.
25310 - When relays refuse a "create" cell because their queue of pending
25311 create cells is too big (typically because their cpu can't keep up
25312 with the arrival rate), send back reason "resource limit" rather
25313 than reason "internal", so network measurement scripts can get a
25314 more accurate picture. Bugfix on 0.1.1.11-alpha; fixes bug 7037.
25315 - Correct file sizes when reading binary files on Cygwin, to avoid
25316 a bug where Tor would fail to read its state file. Fixes bug 6844;
25317 bugfix on 0.1.2.7-alpha.
25318 - Avoid undefined behavior when parsing the list of supported
25319 rendezvous/introduction protocols in a hidden service descriptor.
25320 Previously, Tor would have confused (as-yet-unused) protocol version
25321 numbers greater than 32 with lower ones on many platforms. Fixes
25322 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
25324 o Documentation fixes:
25325 - Clarify that hidden services are TCP only. Fixes bug 6024.
25328 Changes in version 0.2.4.3-alpha - 2012-09-22
25329 Tor 0.2.4.3-alpha fixes another opportunity for a remotely triggerable
25330 assertion, resumes letting relays test reachability of their DirPort,
25331 and cleans up a bunch of smaller bugs.
25334 - Fix an assertion failure in tor_timegm() that could be triggered
25335 by a badly formatted directory object. Bug found by fuzzing with
25336 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
25339 - Fix a possible crash bug when checking for deactivated circuits
25340 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
25341 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
25342 - Allow routers to detect that their own DirPorts are running. When
25343 we removed support for versions_supports_begindir, we also
25344 accidentally removed the mechanism we used to self-test our
25345 DirPort. Diagnosed with help from kargig. Fixes bugs 6814 and 6815;
25346 bugfix on 0.2.4.2-alpha.
25348 o Security features:
25349 - Switch to a completely time-invariant approach for picking nodes
25350 weighted by bandwidth. Our old approach would run through the
25351 part of the loop after it had made its choice slightly slower
25352 than it ran through the part of the loop before it had made its
25353 choice. Addresses ticket 6538.
25354 - Disable the use of Guard nodes when in Tor2WebMode. Guard usage
25355 by tor2web clients allows hidden services to identify tor2web
25356 clients through their repeated selection of the same rendezvous
25357 and introduction point circuit endpoints (their guards). Resolves
25361 - Enable Tor to read configuration, state, and key information from
25362 a FIFO. Previously Tor would only read from files with a positive
25363 stat.st_size. Code from meejah; fixes bug 6044.
25366 - Correct file sizes when reading binary files on Cygwin, to avoid
25367 a bug where Tor would fail to read its state file. Fixes bug 6844;
25368 bugfix on 0.1.2.7-alpha.
25369 - Correctly handle votes with more than 31 flags. Fixes bug 6853;
25370 bugfix on 0.2.0.3-alpha.
25371 - When complaining about a client port on a public address, log
25372 which address we're complaining about. Fixes bug 4020; bugfix on
25373 0.2.3.3-alpha. Patch by Tom Fitzhenry.
25374 - Convert an assert in the pathbias code to a log message. The assert
25375 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
25376 bugfix on 0.2.3.17-beta.
25377 - Our new buildsystem was overzealous about rebuilding manpages: it
25378 would rebuild them all whenever any one of them changed. Now our
25379 dependency checking should be correct. Fixes bug 6843; bugfix on
25381 - Don't do reachability testing over IPv6 unless AuthDirPublishIPv6
25382 is set. Fixes bug 6880. Bugfix on 0.2.4.1-alpha.
25383 - Correct log printout about which address family is preferred
25384 when connecting to a bridge with both an IPv4 and IPv6 OR port.
25385 Fixes bug 6884; bugfix on 0.2.4.1-alpha.
25387 o Minor bugfixes (code cleanliness):
25388 - Fix round_to_power_of_2() so it doesn't invoke undefined behavior
25389 with large values. This situation was untriggered, but nevertheless
25390 incorrect. Fixes bug 6831; bugfix on 0.2.0.1-alpha.
25391 - Reject consensus votes with more than 64 known-flags. We aren't even
25392 close to that limit yet, and our code doesn't handle it correctly.
25393 Fixes bug 6833; bugfix on 0.2.0.1-alpha.
25394 - Avoid undefined behavior when parsing the list of supported
25395 rendezvous/introduction protocols in a hidden service descriptor.
25396 Previously, Tor would have confused (as-yet-unused) protocol version
25397 numbers greater than 32 with lower ones on many platforms. Fixes
25398 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
25399 - Fix handling of rendezvous client authorization types over 8.
25400 Fixes bug 6861; bugfix on 0.2.1.5-alpha.
25401 - Fix building with older versions of GCC (2.95, for one) that don't
25402 like preprocessor directives inside macro arguments. Found by
25403 grarpamp. Fixes bug 6842; bugfix on 0.2.4.2-alpha.
25404 - Switch weighted node selection rule from using a list of doubles
25405 to using a list of int64_t. This change should make the process
25406 slightly easier to debug and maintain. Needed to finish ticket 6538.
25408 o Code simplification and refactoring:
25409 - Move the generic "config" code into a new file, and have "config.c"
25410 hold only torrc- and state-related code. Resolves ticket 6823.
25411 - Move the core of our "choose a weighted element at random" logic
25412 into its own function, and give it unit tests. Now the logic is
25413 testable, and a little less fragile too.
25414 - Removed the testing_since field of node_t, which hasn't been used
25415 for anything since 0.2.0.9-alpha.
25417 o Documentation fixes:
25418 - Clarify that hidden services are TCP only. Fixes bug 6024.
25419 - Resolve a typo in torrc.sample.in. Fixes bug 6819; bugfix on
25423 Changes in version 0.2.3.22-rc - 2012-09-11
25424 Tor 0.2.3.22-rc fixes another opportunity for a remotely triggerable
25428 - Fix an assertion failure in tor_timegm() that could be triggered
25429 by a badly formatted directory object. Bug found by fuzzing with
25430 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
25433 - Avoid segfault when starting up having run with an extremely old
25434 version of Tor and parsing its state file. Fixes bug 6801; bugfix
25438 Changes in version 0.2.2.39 - 2012-09-11
25439 Tor 0.2.2.39 fixes two more opportunities for remotely triggerable
25443 - Fix an assertion failure in tor_timegm() that could be triggered
25444 by a badly formatted directory object. Bug found by fuzzing with
25445 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
25446 - Do not crash when comparing an address with port value 0 to an
25447 address policy. This bug could have been used to cause a remote
25448 assertion failure by or against directory authorities, or to
25449 allow some applications to crash clients. Fixes bug 6690; bugfix
25453 Changes in version 0.2.4.2-alpha - 2012-09-10
25454 Tor 0.2.4.2-alpha enables port forwarding for pluggable transports,
25455 raises the default rate limiting even more, and makes the bootstrapping
25456 log messages less noisy.
25459 - Automatically forward the TCP ports of pluggable transport
25460 proxies using tor-fw-helper if PortForwarding is enabled. Implements
25464 - Raise the default BandwidthRate/BandwidthBurst values from 5MB/10MB
25465 to 1GB/1GB. The previous defaults were intended to be "basically
25466 infinite", but it turns out they're now limiting our 100mbit+
25467 relays and bridges. Fixes bug 6605; bugfix on 0.2.0.10-alpha (the
25468 last time we raised it).
25471 - Detect when we're running with a version of OpenSSL other than the
25472 one we compiled with. This has occasionally given people hard-to-
25474 - Log fewer lines at level "notice" about our OpenSSL and Libevent
25475 versions and capabilities when everything is going right. Resolves
25476 part of ticket 6736.
25477 - Directory authorities no long accept descriptors for any version of
25478 Tor before 0.2.2.35, or for any 0.2.3 release before 0.2.3.10-alpha.
25479 These versions are insecure, unsupported, or both. Implements
25483 - Rename the (internal-use-only) UsingTestingNetworkDefaults option
25484 to start with a triple-underscore so the controller won't touch it.
25485 Patch by Meejah. Fixes bug 3155. Bugfix on 0.2.2.23-alpha.
25486 - Avoid segfault when starting up having run with an extremely old
25487 version of Tor and parsing its state file. Fixes bug 6801; bugfix
25489 - Rename the (testing-use-only) _UseFilteringSSLBufferevents option
25490 so it doesn't start with _. Fixes bug 3155. Bugfix on 0.2.3.1-alpha.
25491 - Don't follow the NULL pointer if microdescriptor generation fails.
25492 (This does not appear to be triggerable, but it's best to be safe.)
25493 Found by "f. tp.". Fixes bug 6797; bugfix on 0.2.4.1-alpha.
25494 - Fix mis-declared dependencies on src/common/crypto.c and
25495 src/or/tor_main.c that could break out-of-tree builds under some
25496 circumstances. Fixes bug 6778; bugfix on 0.2.4.1-alpha.
25497 - Avoid a warning when building common_sha1.i out of tree. Fixes bug
25498 6778; bugfix on 0.2.4.1-alpha.
25499 - Fix a harmless (in this case) build warning for implicitly
25500 converting a strlen() to an int. Bugfix on 0.2.4.1-alpha.
25502 o Removed features:
25503 - Now that all versions before 0.2.2.x are disallowed, we no longer
25504 need to work around their missing features. Thus we can remove a
25505 bunch of compatibility code.
25507 o Code refactoring:
25508 - Tweak tor-fw-helper to accept an arbitrary amount of arbitrary
25509 TCP ports to forward. In the past it only accepted two ports:
25510 the ORPort and the DirPort.
25513 Changes in version 0.2.4.1-alpha - 2012-09-05
25514 Tor 0.2.4.1-alpha lets bridges publish their pluggable transports to
25515 bridgedb; lets relays use IPv6 addresses and directory authorities
25516 advertise them; and switches to a cleaner build interface.
25518 This is the first alpha release in a new series, so expect there to
25519 be bugs. Users who would rather test out a more stable branch should
25520 stay with 0.2.3.x for now.
25522 o Major features (bridges):
25523 - Bridges now report the pluggable transports they support to the
25524 bridge authority, so it can pass the supported transports on to
25525 bridgedb and/or eventually do reachability testing. Implements
25528 o Major features (IPv6):
25529 - Bridge authorities now accept IPv6 bridge addresses and include
25530 them in network status documents. Implements ticket 5534.
25531 - Clients who set "ClientUseIPv6 1" may connect to entry nodes over
25532 IPv6. Set "ClientPreferIPv6ORPort 1" to make this even more likely
25533 to happen. Implements ticket 5535.
25534 - All kind of relays, not just bridges, can now advertise an IPv6
25535 OR port. Implements ticket 6362.
25536 - Directory authorities vote on IPv6 OR ports using the new consensus
25537 method 14. Implements ticket 6363.
25539 o Major features (build):
25540 - Switch to a nonrecursive Makefile structure. Now instead of each
25541 Makefile.am invoking other Makefile.am's, there is a master
25542 Makefile.am that includes the others. This change makes our build
25543 process slightly more maintainable, and improves parallelism for
25544 building with make -j. Original patch by Stewart Smith; various
25545 fixes by Jim Meyering.
25546 - Where available, we now use automake's "silent" make rules by
25547 default, so that warnings are easier to spot. You can get the old
25548 behavior with "make V=1". Patch by Stewart Smith for ticket 6522.
25550 o Minor features (code security and spec conformance):
25551 - Clear keys and key-derived material left on the stack in
25552 rendservice.c and rendclient.c. Check return value of
25553 crypto_pk_write_private_key_to_string() in rend_service_load_keys().
25554 These fixes should make us more forward-secure against cold-boot
25555 attacks and the like. Fixes bug 2385.
25556 - Reject EXTEND cells sent to nonexistent streams. According to the
25557 spec, an EXTEND cell sent to _any_ nonzero stream ID is invalid, but
25558 we were only checking for stream IDs that were currently in use.
25559 Found while hunting for more instances of bug 6271. Bugfix on
25560 0.0.2pre8, which introduced incremental circuit construction.
25562 o Minor features (streamlining);
25563 - No longer include the "opt" prefix when generating routerinfos
25564 or v2 directories: it has been needless since Tor 0.1.2. Closes
25566 - Remove some now-needless code that tried to aggressively flush
25567 OR connections as data was added to them. Since 0.2.0.1-alpha, our
25568 cell queue logic has saved us from the failure mode that this code
25569 was supposed to prevent. Removing this code will limit the number
25570 of baroque control flow paths through Tor's network logic. Reported
25571 pseudonymously on IRC. Fixes bug 6468; bugfix on 0.2.0.1-alpha.
25573 o Minor features (controller):
25574 - Add a "GETINFO signal/names" control port command. Implements
25576 - Provide default values for all options via "GETINFO config/defaults".
25577 Implements ticket 4971.
25579 o Minor features (IPv6):
25580 - New config option "AuthDirHasIPv6Connectivity 1" that directory
25581 authorities should set if they have IPv6 connectivity and want to
25582 do reachability tests for IPv6 relays. Implements feature 5974.
25583 - A relay with an IPv6 OR port now sends that address in NETINFO
25584 cells (in addition to its other address). Implements ticket 6364.
25586 o Minor features (log messages):
25587 - Omit the first heartbeat log message, because it never has anything
25588 useful to say, and it clutters up the bootstrapping messages.
25589 Resolves ticket 6758.
25590 - Don't log about reloading the microdescriptor cache at startup. Our
25591 bootstrap warnings are supposed to tell the user when there's a
25592 problem, and our bootstrap notices say when there isn't. Resolves
25593 ticket 6759; bugfix on 0.2.2.6-alpha.
25594 - Don't log "I learned some more directory information" when we're
25595 reading cached directory information. Reserve it for when new
25596 directory information arrives in response to a fetch. Resolves
25598 - Prevent rounding error in path bias counts when scaling
25599 them down, and use the correct scale factor default. Also demote
25600 some path bias related log messages down a level and make others
25601 less scary sounding. Fixes bug 6647. Bugfix against 0.2.3.17-beta.
25602 - We no longer warn so much when generating manpages from their
25605 o Code simplifications and refactoring:
25606 - Enhance our internal sscanf replacement so that we can eliminate
25607 the last remaining uses of the system sscanf. (Though those uses
25608 of sscanf were safe, sscanf itself is generally error prone, so
25609 we want to eliminate when we can.) Fixes ticket 4195 and Coverity
25611 - Move ipv6_preferred from routerinfo_t to node_t. Addresses bug 4620.
25612 - Move last_reachable and testing_since from routerinfo_t to node_t.
25613 Implements ticket 5529.
25614 - Add replaycache_t structure, functions and unit tests, then refactor
25615 rend_service_introduce() to be more clear to read, improve, debug,
25616 and test. Resolves bug 6177.
25617 - Finally remove support for malloc_good_size and malloc_usable_size.
25618 We had hoped that these functions would let us eke a little more
25619 memory out of our malloc implementation. Unfortunately, the only
25620 implementations that provided these functions are also ones that
25621 are already efficient about not overallocation: they never got us
25622 more than 7 or so bytes per allocation. Removing them saves us a
25623 little code complexity and a nontrivial amount of build complexity.
25625 o New requirements:
25626 - Tor maintainers now require Automake version 1.9 or later to build
25627 Tor from the Git repository. (Automake is not required when building
25628 from a source distribution.)
25631 Changes in version 0.2.3.21-rc - 2012-09-05
25632 Tor 0.2.3.21-rc is the fourth release candidate for the Tor 0.2.3.x
25633 series. It fixes a trio of potential security bugs, fixes a bug where
25634 we were leaving some of the fast relays out of the microdescriptor
25635 consensus, resumes interpreting "ORPort 0" and "DirPort 0" correctly,
25636 and cleans up other smaller issues.
25638 o Major bugfixes (security):
25639 - Tear down the circuit if we get an unexpected SENDME cell. Clients
25640 could use this trick to make their circuits receive cells faster
25641 than our flow control would have allowed, or to gum up the network,
25642 or possibly to do targeted memory denial-of-service attacks on
25643 entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor --
25644 from July 2002, before the release of Tor 0.0.0. We had committed
25645 this patch previously, but we had to revert it because of bug 6271.
25646 Now that 6271 is fixed, this patch appears to work.
25647 - Reject any attempt to extend to an internal address. Without
25648 this fix, a router could be used to probe addresses on an internal
25649 network to see whether they were accepting connections. Fixes bug
25650 6710; bugfix on 0.0.8pre1.
25651 - Do not crash when comparing an address with port value 0 to an
25652 address policy. This bug could have been used to cause a remote
25653 assertion failure by or against directory authorities, or to
25654 allow some applications to crash clients. Fixes bug 6690; bugfix
25658 - Remove the upper bound on microdescriptor length. We were hitting
25659 the limit for routers with complex exit policies or family
25660 declarations, causing clients to not use them. Fixes the first
25661 piece of bug 6404; fix on 0.2.2.6-alpha.
25662 - Detect "ORPort 0" as meaning, uniformly, that we're not running
25663 as a relay. Previously, some of our code would treat the presence
25664 of any ORPort line as meaning that we should act like a relay,
25665 even though our new listener code would correctly not open any
25666 ORPorts for ORPort 0. Similar bugs in other Port options are also
25667 fixed. Fixes the first half of bug 6507; bugfix on 0.2.3.3-alpha.
25670 - Avoid a pair of double-free and use-after-mark bugs that can
25671 occur with certain timings in canceled and re-received DNS
25672 requests. Fixes bug 6472; bugfix on 0.0.7rc1.
25673 - Fix build and 64-bit compile warnings from --enable-openbsd-malloc.
25674 Fixes bug 6379. Bugfix on 0.2.0.20-rc.
25675 - Allow one-hop directory fetching circuits the full "circuit build
25676 timeout" period, rather than just half of it, before failing them
25677 and marking the relay down. This fix should help reduce cases where
25678 clients declare relays (or worse, bridges) unreachable because
25679 the TLS handshake takes a few seconds to complete. Fixes bug 6743;
25680 bugfix on 0.2.2.2-alpha, where we changed the timeout from a static
25682 - Authorities no longer include any router in their microdescriptor
25683 consensuses for which they couldn't generate or agree on a
25684 microdescriptor. Fixes the second piece of bug 6404; fix on
25686 - Detect and reject attempts to specify both "FooPort" and
25687 "FooPort 0" in the same configuration domain. (It's still okay
25688 to have a FooPort in your configuration file, and use "FooPort 0"
25689 on the command line to disable it.) Fixes the second half of bug
25690 6507; bugfix on 0.2.3.3-alpha.
25691 - Make wildcarded addresses (that is, ones beginning with "*.") work
25692 when provided via the controller's MapAddress command. Previously,
25693 they were accepted, but we never actually noticed that they were
25694 wildcards. Fixes bug 6244; bugfix on 0.2.3.9-alpha.
25695 - Avoid crashing on a malformed state file where EntryGuardPathBias
25696 precedes EntryGuard. Fix for bug 6774; bugfix on 0.2.3.17-beta.
25697 - Add a (probably redundant) memory clear between iterations of
25698 the router status voting loop, to prevent future coding errors
25699 where data might leak between iterations of the loop. Resolves
25702 o Minor bugfixes (log messages):
25703 - Downgrade "set buildtimeout to low value" messages to "info"
25704 severity; they were never an actual problem, there was never
25705 anything reasonable to do about them, and they tended to spam logs
25706 from time to time. Fixes bug 6251; bugfix on 0.2.2.2-alpha.
25707 - Downgrade path-bias warning messages to "info". We'll try to get
25708 them working better in 0.2.4. Add internal circuit construction
25709 state to protect against the noisy warn message "Unexpectedly high
25710 circuit_successes". Also add some additional rate-limited notice
25711 messages to help determine the root cause of the warn. Fixes bug
25712 6475. Bugfix against 0.2.3.17-beta.
25713 - Move log message when unable to find a microdesc in a routerstatus
25714 entry to parse time. Previously we'd spam this warning every time
25715 we tried to figure out which microdescriptors to download. Fixes
25716 the third piece of bug 6404; fix on 0.2.3.18-rc.
25719 - Consider new, removed or changed IPv6 OR ports a non-cosmetic
25720 change when the authority is deciding whether to accept a newly
25721 uploaded descriptor. Implements ticket 6423.
25722 - Add missing documentation for consensus and microdesc files.
25723 Resolves ticket 6732.
25726 Changes in version 0.2.2.38 - 2012-08-12
25727 Tor 0.2.2.38 fixes a remotely triggerable crash bug, and fixes a timing
25728 attack that could in theory leak path information.
25731 - Avoid an uninitialized memory read when reading a vote or consensus
25732 document that has an unrecognized flavor name. This read could
25733 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
25734 - Try to leak less information about what relays a client is
25735 choosing to a side-channel attacker. Previously, a Tor client would
25736 stop iterating through the list of available relays as soon as it
25737 had chosen one, thus finishing a little earlier when it picked
25738 a router earlier in the list. If an attacker can recover this
25739 timing information (nontrivial but not proven to be impossible),
25740 they could learn some coarse-grained information about which relays
25741 a client was picking (middle nodes in particular are likelier to
25742 be affected than exits). The timing attack might be mitigated by
25743 other factors (see bug 6537 for some discussion), but it's best
25744 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
25747 Changes in version 0.2.3.20-rc - 2012-08-05
25748 Tor 0.2.3.20-rc is the third release candidate for the Tor 0.2.3.x
25749 series. It fixes a pair of code security bugs and a potential anonymity
25750 issue, updates our RPM spec files, and cleans up other smaller issues.
25753 - Avoid read-from-freed-memory and double-free bugs that could occur
25754 when a DNS request fails while launching it. Fixes bug 6480;
25755 bugfix on 0.2.0.1-alpha.
25756 - Avoid an uninitialized memory read when reading a vote or consensus
25757 document that has an unrecognized flavor name. This read could
25758 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
25759 - Try to leak less information about what relays a client is
25760 choosing to a side-channel attacker. Previously, a Tor client would
25761 stop iterating through the list of available relays as soon as it
25762 had chosen one, thus finishing a little earlier when it picked
25763 a router earlier in the list. If an attacker can recover this
25764 timing information (nontrivial but not proven to be impossible),
25765 they could learn some coarse-grained information about which relays
25766 a client was picking (middle nodes in particular are likelier to
25767 be affected than exits). The timing attack might be mitigated by
25768 other factors (see bug 6537 for some discussion), but it's best
25769 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
25772 - Try to make the warning when giving an obsolete SOCKSListenAddress
25773 a little more useful.
25774 - Terminate active server managed proxies if Tor stops being a
25775 relay. Addresses parts of bug 6274; bugfix on 0.2.3.6-alpha.
25776 - Provide a better error message about possible OSX Asciidoc failure
25777 reasons. Fixes bug 6436.
25778 - Warn when Tor is configured to use accounting in a way that can
25779 link a hidden service to some other hidden service or public
25780 address. Resolves ticket 6490.
25783 - Check return value of fputs() when writing authority certificate
25784 file. Fixes Coverity issue 709056; bugfix on 0.2.0.1-alpha.
25785 - Ignore ServerTransportPlugin lines when Tor is not configured as
25786 a relay. Fixes bug 6274; bugfix on 0.2.3.6-alpha.
25787 - When disabling guards for having too high a proportion of failed
25788 circuits, make sure to look at each guard. Fixes bug 6397; bugfix
25792 - Update our default RPM spec files to work with mock and rpmbuild
25793 on RHEL/Fedora. They have an updated set of dependencies and
25794 conflicts, a fix for an ancient typo when creating the "_tor"
25795 user, and better instructions. Thanks to Ondrej Mikle for the
25796 patch series. Fixes bug 6043.
25799 - Make it possible to set the TestingTorNetwork configuration
25800 option using AlternateDirAuthority and AlternateBridgeAuthority
25801 as an alternative to setting DirServer. Addresses ticket 6377.
25804 - Clarify the documentation for the Alternate*Authority options.
25806 - Fix some typos in the manpages. Patch from A. Costa. Fixes bug 6500.
25808 o Code simplification and refactoring:
25809 - Do not use SMARTLIST_FOREACH for any loop whose body exceeds
25810 10 lines. Also, don't nest them. Doing so in the past has
25811 led to hard-to-debug code. The new style is to use the
25812 SMARTLIST_FOREACH_{BEGIN,END} pair. Addresses issue 6400.
25815 Changes in version 0.2.3.19-rc - 2012-07-06
25816 Tor 0.2.3.19-rc is the second release candidate for the Tor 0.2.3.x
25817 series. It fixes the compile on Windows, reverts to a GeoIP database
25818 that isn't as broken, and fixes a flow control bug that has been around
25819 since the beginning of Tor.
25822 - Fix a bug handling SENDME cells on nonexistent streams that could
25823 result in bizarre window values. Report and patch contributed
25824 pseudonymously. Fixes part of bug 6271. This bug was introduced
25825 before the first Tor release, in svn commit r152.
25826 - Revert to the May 1 2012 Maxmind GeoLite Country database. In the
25827 June 2012 database, Maxmind marked many Tor relays as country "A1",
25828 which will cause risky behavior for clients that set EntryNodes
25829 or ExitNodes. Addresses bug 6334; bugfix on 0.2.3.17-beta.
25830 - Instead of ENOBUFS on Windows, say WSAENOBUFS. Fixes compilation
25831 on Windows. Fixes bug 6296; bugfix on 0.2.3.18-rc.
25834 - Fix wrong TCP port range in parse_port_range(). Fixes bug 6218;
25835 bugfix on 0.2.1.10-alpha.
25838 Changes in version 0.2.3.18-rc - 2012-06-28
25839 Tor 0.2.3.18-rc is the first release candidate for the Tor 0.2.3.x
25840 series. It fixes a few smaller bugs, but generally appears stable.
25841 Please test it and let us know whether it is!
25844 - Allow wildcarded mapaddress targets to be specified on the
25845 controlport. Partially fixes bug 6244; bugfix on 0.2.3.9-alpha.
25846 - Make our linker option detection code more robust against linkers
25847 such as on FreeBSD 8, where a bad combination of options completes
25848 successfully but makes an unrunnable binary. Fixes bug 6173;
25849 bugfix on 0.2.3.17-beta.
25851 o Minor bugfixes (on 0.2.2.x and earlier):
25852 - Avoid a false positive in the util/threads unit test by increasing
25853 the maximum timeout time. Fixes bug 6227; bugfix on 0.2.0.4-alpha.
25854 - Replace "Sending publish request" log messages with "Launching
25855 upload", so that they no longer confusingly imply that we're
25856 sending something to a directory we might not even be connected
25857 to yet. Fixes bug 3311; bugfix on 0.2.0.10-alpha.
25858 - Make sure to set *socket_error in all error cases in
25859 connection_connect(), so it can't produce a warning about
25860 errno being zero from errno_to_orconn_end_reason(). Bugfix on
25861 0.2.1.1-alpha; resolves ticket 6028.
25862 - Downgrade "Got a certificate, but we already have it" log messages
25863 from warning to info, except when we're a dirauth. Fixes bug 5238;
25864 bugfix on 0.2.1.7-alpha.
25865 - When checking for requested signatures on the latest consensus
25866 before serving it to a client, make sure to check the right
25867 consensus flavor. Bugfix on 0.2.2.6-alpha.
25868 - Downgrade "eventdns rejected address" message to LOG_PROTOCOL_WARN.
25869 Fixes bug 5932; bugfix on 0.2.2.7-alpha.
25871 o Minor bugfixes (on 0.2.3.x):
25872 - Make format_helper_exit_status() avoid unnecessary space padding
25873 and stop confusing log_from_pipe(). Fixes ticket 5557; bugfix
25875 - Downgrade a message about cleaning the microdescriptor cache to
25876 "info" from "notice". Fixes bug 6238; bugfix on 0.2.3.1-alpha.
25877 - Log a BUG message at severity INFO if we have a networkstatus with
25878 a missing entry for some microdescriptor. Continues on a patch
25880 - Improve the log message when a managed proxy fails to launch. Fixes
25881 bug 5099; bugfix on 0.2.3.6-alpha.
25882 - Don't do DNS lookups when parsing corrupted managed proxy protocol
25883 messages. Fixes bug 6226; bugfix on 0.2.3.6-alpha.
25884 - When formatting wildcarded address mappings for the controller,
25885 be sure to include "*." as appropriate. Partially fixes bug 6244;
25886 bugfix on 0.2.3.9-alpha.
25887 - Avoid a warning caused by using strcspn() from glibc with clang 3.0.
25888 Bugfix on 0.2.3.13-alpha.
25889 - Stop logging messages about running with circuit timeout learning
25890 enabled at severity LD_BUG. Fixes bug 6169; bugfix on 0.2.3.17-beta.
25891 - Disable a spurious warning about reading on a marked and flushing
25892 connection. We shouldn't be doing that, but apparently we
25893 sometimes do. Fixes bug 6203; bugfix on 0.2.3.17-beta.
25894 - Fix a bug that stopped AllowDotExit from working on addresses
25895 that had an entry in the DNS cache. Fixes bug 6211; bugfix on
25898 o Code simplification, refactoring, unit tests:
25899 - Move tor_gettimeofday_cached() into compat_libevent.c, and use
25900 Libevent's notion of cached time when possible.
25901 - Remove duplicate code for invoking getrlimit() from control.c.
25902 - Add a unit test for the environment_variable_names_equal function.
25905 - Document the --defaults-torrc option, and the new (in 0.2.3)
25906 semantics for overriding, extending, and clearing lists of
25907 options. Closes bug 4748.
25910 Changes in version 0.2.3.17-beta - 2012-06-15
25911 Tor 0.2.3.17-beta enables compiler and linker hardening by default,
25912 gets our TLS handshake back on track for being able to blend in with
25913 Firefox, fixes a big bug in 0.2.3.16-alpha that broke Tor's interaction
25914 with Vidalia, and otherwise continues to get us closer to a release
25918 - Enable gcc and ld hardening by default. Resolves ticket 5210.
25919 - Update TLS cipher list to match Firefox 8 and later. Resolves
25921 - Implement the client side of proposal 198: remove support for
25922 clients falsely claiming to support standard ciphersuites that
25923 they can actually provide. As of modern OpenSSL versions, it's not
25924 necessary to fake any standard ciphersuite, and doing so prevents
25925 us from using better ciphersuites in the future, since servers
25926 can't know whether an advertised ciphersuite is really supported or
25927 not. Some hosts -- notably, ones with very old versions of OpenSSL
25928 or where OpenSSL has been built with ECC disabled -- will stand
25929 out because of this change; TBB users should not be affected.
25932 - Change the default value for DynamicDHGroups (introduced in
25933 0.2.3.9-alpha) to 0. This feature can make Tor relays less
25934 identifiable by their use of the mod_ssl DH group, but at
25935 the cost of some usability (#4721) and bridge tracing (#6087)
25936 regressions. Resolves ticket 5598.
25937 - Send a CRLF at the end of each STATUS_* control protocol event. This
25938 bug tickled a bug in Vidalia which would make it freeze. Fixes
25939 bug 6094; bugfix on 0.2.3.16-alpha.
25942 - Disable writing on marked-for-close connections when they are
25943 blocked on bandwidth, to prevent busy-looping in Libevent. Fixes
25944 bug 5263; bugfix on 0.0.2pre13, where we first added a special
25945 case for flushing marked connections.
25946 - Detect SSL handshake even when the initial attempt to write the
25947 server hello fails. Fixes bug 4592; bugfix on 0.2.0.13-alpha.
25948 - Change the AllowDotExit rules so they should actually work.
25949 We now enforce AllowDotExit only immediately after receiving an
25950 address via SOCKS or DNSPort: other sources are free to provide
25951 .exit addresses after the resolution occurs. Fixes bug 3940;
25952 bugfix on 0.2.2.1-alpha.
25953 - Fix a (harmless) integer overflow in cell statistics reported by
25954 some fast relays. Fixes bug 5849; bugfix on 0.2.2.1-alpha.
25955 - Make sure circuitbuild.c checks LearnCircuitBuildTimeout in all the
25956 right places and never depends on the consensus parameters or
25957 computes adaptive timeouts when it is disabled. Fixes bug 5049;
25958 bugfix on 0.2.2.14-alpha.
25959 - When building Tor on Windows with -DUNICODE (not default), ensure
25960 that error messages, filenames, and DNS server names are always
25961 NUL-terminated when we convert them to a single-byte encoding.
25962 Fixes bug 5909; bugfix on 0.2.2.16-alpha.
25963 - Make Tor build correctly again with -DUNICODE -D_UNICODE defined.
25964 Fixes bug 6097; bugfix on 0.2.2.16-alpha.
25965 - Fix an edge case where TestingTorNetwork is set but the authorities
25966 and relays all have an uptime of zero, where the private Tor network
25967 could briefly lack support for hidden services. Fixes bug 3886;
25968 bugfix on 0.2.2.18-alpha.
25969 - Correct the manpage's descriptions for the default values of
25970 DirReqStatistics and ExtraInfoStatistics. Fixes bug 2865; bugfix
25972 - Fix the documentation for the --hush and --quiet command line
25973 options, which changed their behavior back in 0.2.3.3-alpha.
25974 - Fix compilation warning with clang 3.1. Fixes bug 6141; bugfix on
25978 - Rate-limit the "Weighted bandwidth is 0.000000" message, and add
25979 more information to it, so that we can track it down in case it
25980 returns again. Mitigates bug 5235.
25981 - Check CircuitBuildTimeout and LearnCircuitBuildTimeout in
25982 options_validate(); warn if LearnCircuitBuildTimeout is disabled and
25983 CircuitBuildTimeout is set unreasonably low. Resolves ticket 5452.
25984 - Warn the user when HTTPProxy, but no other proxy type, is
25985 configured. This can cause surprising behavior: it doesn't send
25986 all of Tor's traffic over the HTTPProxy -- it sends unencrypted
25987 directory traffic only. Resolves ticket 4663.
25988 - Issue a notice if a guard completes less than 40% of your circuits.
25989 Threshold is configurable by torrc option PathBiasNoticeRate and
25990 consensus parameter pb_noticepct. There is additional, off-by-
25991 default code to disable guards which fail too many circuits.
25992 Addresses ticket 5458.
25993 - Update to the June 6 2012 Maxmind GeoLite Country database.
25995 o Code simplifications and refactoring:
25996 - Remove validate_pluggable_transports_config(): its warning
25997 message is now handled by connection_or_connect().
26000 Changes in version 0.2.2.37 - 2012-06-06
26001 Tor 0.2.2.37 introduces a workaround for a critical renegotiation
26002 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
26006 - Work around a bug in OpenSSL that broke renegotiation with TLS
26007 1.1 and TLS 1.2. Without this workaround, all attempts to speak
26008 the v2 Tor connection protocol when both sides were using OpenSSL
26009 1.0.1 would fail. Resolves ticket 6033.
26010 - When waiting for a client to renegotiate, don't allow it to add
26011 any bytes to the input buffer. This fixes a potential DoS issue.
26012 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
26013 - Fix an edge case where if we fetch or publish a hidden service
26014 descriptor, we might build a 4-hop circuit and then use that circuit
26015 for exiting afterwards -- even if the new last hop doesn't obey our
26016 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
26019 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
26020 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
26023 - Tell GCC and Clang to check for any errors in format strings passed
26024 to the tor_v*(print|scan)f functions.
26027 Changes in version 0.2.3.16-alpha - 2012-06-05
26028 Tor 0.2.3.16-alpha introduces a workaround for a critical renegotiation
26029 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
26030 currently). It also fixes a variety of smaller bugs and other cleanups
26031 that get us closer to a release candidate.
26033 o Major bugfixes (general):
26034 - Work around a bug in OpenSSL that broke renegotiation with TLS
26035 1.1 and TLS 1.2. Without this workaround, all attempts to speak
26036 the v2 Tor connection protocol when both sides were using OpenSSL
26037 1.0.1 would fail. Resolves ticket 6033.
26038 - When waiting for a client to renegotiate, don't allow it to add
26039 any bytes to the input buffer. This fixes a potential DoS issue.
26040 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
26041 - Pass correct OR address to managed proxies (like obfsproxy),
26042 even when ORListenAddress is used. Fixes bug 4865; bugfix on
26044 - The advertised platform of a router now includes only its operating
26045 system's name (e.g., "Linux", "Darwin", "Windows 7"), and not its
26046 service pack level (for Windows) or its CPU architecture (for Unix).
26047 We also no longer include the "git-XYZ" tag in the version. Resolves
26050 o Major bugfixes (clients):
26051 - If we are unable to find any exit that supports our predicted ports,
26052 stop calling them predicted, so that we don't loop and build
26053 hopeless circuits indefinitely. Fixes bug 3296; bugfix on 0.0.9pre6,
26054 which introduced predicted ports.
26055 - Fix an edge case where if we fetch or publish a hidden service
26056 descriptor, we might build a 4-hop circuit and then use that circuit
26057 for exiting afterwards -- even if the new last hop doesn't obey our
26058 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
26059 - Check at each new consensus whether our entry guards were picked
26060 long enough ago that we should rotate them. Previously, we only
26061 did this check at startup, which could lead to us holding a guard
26062 indefinitely. Fixes bug 5380; bugfix on 0.2.1.14-rc.
26063 - When fetching a bridge descriptor from a bridge authority,
26064 always do so anonymously, whether we have been able to open
26065 circuits or not. Partial fix for bug 1938; bugfix on 0.2.0.7-alpha.
26066 This behavior makes it *safer* to use UpdateBridgesFromAuthority,
26067 but we'll need to wait for bug 6010 before it's actually usable.
26069 o Major bugfixes (directory authorities):
26070 - When computing weight parameters, behave more robustly in the
26071 presence of a bad bwweightscale value. Previously, the authorities
26072 would crash if they agreed on a sufficiently broken weight_scale
26073 value: now, they use a reasonable default and carry on. Partial
26074 fix for 5786; bugfix on 0.2.2.17-alpha.
26075 - Check more thoroughly to prevent a rogue authority from
26076 double-voting on any consensus directory parameter. Previously,
26077 authorities would crash in this case if the total number of
26078 votes for any parameter exceeded the number of active voters,
26079 but would let it pass otherwise. Partial fix for bug 5786; bugfix
26083 - Rate-limit log messages when asked to connect anonymously to
26084 a private address. When these hit, they tended to hit fast and
26085 often. Also, don't bother trying to connect to addresses that we
26086 are sure will resolve to 127.0.0.1: getting 127.0.0.1 in a directory
26087 reply makes us think we have been lied to, even when the address the
26088 client tried to connect to was "localhost." Resolves ticket 2822.
26089 - Allow packagers to insert an extra string in server descriptor
26090 platform lines by setting the preprocessor variable TOR_BUILD_TAG.
26091 Resolves the rest of ticket 2988.
26092 - Raise the threshold of server descriptors needed (75%) and exit
26093 server descriptors needed (50%) before we will declare ourselves
26094 bootstrapped. This will make clients start building circuits a
26095 little later, but makes the initially constructed circuits less
26096 skewed and less in conflict with further directory fetches. Fixes
26098 - Close any connection that sends unrecognized junk before the
26099 handshake. Solves an issue noted in bug 4369.
26100 - Improve log messages about managed transports. Resolves ticket 5070.
26101 - Tag a bridge's descriptor as "never to be sent unencrypted".
26102 This shouldn't matter, since bridges don't open non-anonymous
26103 connections to the bridge authority and don't allow unencrypted
26104 directory connections from clients, but we might as well make
26105 sure. Closes bug 5139.
26106 - Expose our view of whether we have gone dormant to the controller,
26107 via a new "GETINFO dormant" value. Torbutton and other controllers
26108 can use this to avoid doing periodic requests through Tor while
26109 it's dormant (bug 4718). Fixes bug 5954.
26110 - Tell GCC and Clang to check for any errors in format strings passed
26111 to the tor_v*(print|scan)f functions.
26112 - Update to the May 1 2012 Maxmind GeoLite Country database.
26114 o Minor bugfixes (already included in 0.2.2.36):
26115 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
26116 Fixes bug 5346; bugfix on 0.0.8pre3.
26117 - Correct parsing of certain date types in parse_http_time().
26118 Without this patch, If-Modified-Since would behave
26119 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
26120 Esteban Manchado Velázques.
26121 - Make our number-parsing functions always treat too-large values
26122 as an error, even when those values exceed the width of the
26123 underlying type. Previously, if the caller provided these
26124 functions with minima or maxima set to the extreme values of the
26125 underlying integer type, these functions would return those
26126 values on overflow rather than treating overflow as an error.
26127 Fixes part of bug 5786; bugfix on 0.0.9.
26128 - If we hit the error case where routerlist_insert() replaces an
26129 existing (old) server descriptor, make sure to remove that
26130 server descriptor from the old_routers list. Fix related to bug
26131 1776. Bugfix on 0.2.2.18-alpha.
26132 - Clarify the behavior of MaxCircuitDirtiness with hidden service
26133 circuits. Fixes issue 5259.
26135 o Minor bugfixes (coding cleanup, on 0.2.2.x and earlier):
26136 - Prevent a null-pointer dereference when receiving a data cell
26137 for a nonexistent stream when the circuit in question has an
26138 empty deliver window. We don't believe this is triggerable,
26139 since we don't currently allow deliver windows to become empty,
26140 but the logic is tricky enough that it's better to make the code
26141 robust. Fixes bug 5541; bugfix on 0.0.2pre14.
26142 - Fix a memory leak when trying to launch a DNS request when the
26143 network is disabled or the nameservers are unconfigurable. Fixes
26144 bug 5916; bugfix on Tor 0.1.2.1-alpha (for the unconfigurable
26145 nameserver case) and on 0.2.3.9-alpha (for the DisableNetwork case).
26146 - Don't hold a Windows file handle open for every file mapping;
26147 the file mapping handle is sufficient. Fixes bug 5951; bugfix on
26149 - Avoid O(n^2) performance characteristics when parsing a large
26150 extrainfo cache. Fixes bug 5828; bugfix on 0.2.0.1-alpha.
26151 - Format more doubles with %f, not %lf. Patch from grarpamp to make
26152 Tor build correctly on older BSDs again. Fixes bug 3894; bugfix on
26154 - Make our replacement implementation of strtok_r() compatible with
26155 the standard behavior of strtok_r(). Patch by nils. Fixes bug 5091;
26156 bugfix on 0.2.2.1-alpha.
26157 - Fix a NULL-pointer dereference on a badly formed
26158 SETCIRCUITPURPOSE command. Found by mikeyc. Fixes bug 5796;
26159 bugfix on 0.2.2.9-alpha.
26160 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
26161 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
26162 - Defensively refactor rend_mid_rendezvous() so that protocol
26163 violations and length checks happen in the beginning. Fixes
26165 - Set _WIN32_WINNT to 0x0501 consistently throughout the code, so
26166 that IPv6 stuff will compile on MSVC, and compilation issues
26167 will be easier to track down. Fixes bug 5861.
26169 o Minor bugfixes (correctness, on 0.2.2.x and earlier):
26170 - Exit nodes now correctly report EADDRINUSE and EADDRNOTAVAIL as
26171 resource exhaustion, so that clients can adjust their load to
26172 try other exits. Fixes bug 4710; bugfix on 0.1.0.1-rc, which
26173 started using END_STREAM_REASON_RESOURCELIMIT.
26174 - Don't check for whether the address we're using for outbound
26175 connections has changed until after the outbound connection has
26176 completed. On Windows, getsockname() doesn't succeed until the
26177 connection is finished. Fixes bug 5374; bugfix on 0.1.1.14-alpha.
26178 - If the configuration tries to set MyFamily on a bridge, refuse to
26179 do so, and warn about the security implications. Fixes bug 4657;
26180 bugfix on 0.2.0.3-alpha.
26181 - If the client fails to set a reasonable set of ciphersuites
26182 during its v2 handshake renegotiation, allow the renegotiation to
26183 continue nevertheless (i.e. send all the required certificates).
26184 Fixes bug 4591; bugfix on 0.2.0.20-rc.
26185 - When we receive a SIGHUP and the controller __ReloadTorrcOnSIGHUP
26186 option is set to 0 (which Vidalia version 0.2.16 now does when
26187 a SAVECONF attempt fails), perform other actions that SIGHUP
26188 usually causes (like reopening the logs). Fixes bug 5095; bugfix
26190 - If we fail to write a microdescriptor to the disk cache, do not
26191 continue replacing the old microdescriptor file. Fixes bug 2954;
26192 bugfix on 0.2.2.6-alpha.
26193 - Exit nodes don't need to fetch certificates for authorities that
26194 they don't recognize; only directory authorities, bridges,
26195 and caches need to do that. Fixes part of bug 2297; bugfix on
26197 - Correctly handle checking the permissions on the parent
26198 directory of a control socket in the root directory. Bug found
26199 by Esteban Manchado Velázquez. Fixes bug 5089; bugfix on Tor
26201 - When told to add a bridge with the same digest as a preexisting
26202 bridge but a different addr:port, change the addr:port as
26203 requested. Previously we would not notice the change. Fixes half
26204 of bug 5603; fix on 0.2.2.26-beta.
26205 - End AUTHCHALLENGE error messages (in the control protocol) with
26206 a CRLF. Fixes bug 5760; bugfix on 0.2.2.36 and 0.2.3.13-alpha.
26208 o Minor bugfixes (on 0.2.3.x):
26209 - Turn an assertion (that the number of handshakes received as a
26210 server is not < 1) into a warning. Fixes bug 4873; bugfix on
26212 - Format IPv4 addresses correctly in ADDRMAP events. (Previously,
26213 we had reversed them when the answer was cached.) Fixes bug
26214 5723; bugfix on 0.2.3.1-alpha.
26215 - Work correctly on Linux systems with accept4 support advertised in
26216 their headers, but without accept4 support in the kernel. Fix
26217 by murb. Fixes bug 5762; bugfix on 0.2.3.1-alpha.
26218 - When told to add a bridge with the same addr:port as a preexisting
26219 bridge but a different transport, change the transport as
26220 requested. Previously we would not notice the change. Fixes half
26221 of bug 5603; fix on 0.2.3.2-alpha.
26222 - Avoid a "double-reply" warning when replying to a SOCKS request
26223 with a parse error. Patch from Fabian Keil. Fixes bug 4108;
26224 bugfix on 0.2.3.4-alpha.
26225 - Fix a bug where a bridge authority crashes if it has seen no
26226 directory requests when it's time to write statistics to disk.
26227 Fixes bug 5891; bugfix on 0.2.3.6-alpha. Also fixes bug 5508 in
26229 - Don't try to open non-control listeners when DisableNetwork is set.
26230 Previously, we'd open all listeners, then immediately close them.
26231 Fixes bug 5604; bugfix on 0.2.3.9-alpha.
26232 - Don't abort the managed proxy protocol if the managed proxy
26233 sends us an unrecognized line; ignore it instead. Fixes bug
26234 5910; bugfix on 0.2.3.9-alpha.
26235 - Fix a compile warning in crypto.c when compiling with clang 3.1.
26236 Fixes bug 5969, bugfix on 0.2.3.9-alpha.
26237 - Fix a compilation issue on GNU Hurd, which doesn't have PATH_MAX.
26238 Fixes bug 5355; bugfix on 0.2.3.11-alpha.
26239 - Remove bogus definition of "_WIN32" from src/win32/orconfig.h, to
26240 unbreak the MSVC build. Fixes bug 5858; bugfix on 0.2.3.12-alpha.
26241 - Resolve numerous small warnings and build issues with MSVC. Resolves
26244 o Documentation fixes:
26245 - Improve the manual's documentation for the NT Service command-line
26246 options. Addresses ticket 3964.
26247 - Clarify SessionGroup documentation slightly; resolves ticket 5437.
26248 - Document the changes to the ORPort and DirPort options, and the
26249 fact that {OR/Dir}ListenAddress is now unnecessary (and
26250 therefore deprecated). Resolves ticket 5597.
26253 - Remove the torrc.bridge file: we don't use it for anything, and
26254 it had become badly desynchronized from torrc.sample. Resolves
26258 Changes in version 0.2.2.36 - 2012-05-24
26259 Tor 0.2.2.36 updates the addresses for two of the eight directory
26260 authorities, fixes some potential anonymity and security issues,
26261 and fixes several crash bugs.
26263 Tor 0.2.1.x has reached its end-of-life. Those Tor versions have many
26264 known flaws, and nobody should be using them. You should upgrade. If
26265 you're using a Linux or BSD and its packages are obsolete, stop using
26266 those packages and upgrade anyway.
26268 o Directory authority changes:
26269 - Change IP address for maatuska (v3 directory authority).
26270 - Change IP address for ides (v3 directory authority), and rename
26274 - When building or running with any version of OpenSSL earlier
26275 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
26276 versions have a bug (CVE-2011-4576) in which their block cipher
26277 padding includes uninitialized data, potentially leaking sensitive
26278 information to any peer with whom they make a SSLv3 connection. Tor
26279 does not use SSL v3 by default, but a hostile client or server
26280 could force an SSLv3 connection in order to gain information that
26281 they shouldn't have been able to get. The best solution here is to
26282 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
26283 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
26284 to make sure that the bug can't happen.
26285 - Never use a bridge or a controller-supplied node as an exit, even
26286 if its exit policy allows it. Found by wanoskarnet. Fixes bug
26287 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
26288 and 0.2.0.3-alpha (for bridge-purpose descriptors).
26289 - Only build circuits if we have a sufficient threshold of the total
26290 descriptors that are marked in the consensus with the "Exit"
26291 flag. This mitigates an attack proposed by wanoskarnet, in which
26292 all of a client's bridges collude to restrict the exit nodes that
26293 the client knows about. Fixes bug 5343.
26294 - Provide controllers with a safer way to implement the cookie
26295 authentication mechanism. With the old method, if another locally
26296 running program could convince a controller that it was the Tor
26297 process, then that program could trick the controller into telling
26298 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
26299 authentication method uses a challenge-response approach to prevent
26300 this attack. Fixes bug 5185; implements proposal 193.
26303 - Avoid logging uninitialized data when unable to decode a hidden
26304 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
26305 - Avoid a client-side assertion failure when receiving an INTRODUCE2
26306 cell on a general purpose circuit. Fixes bug 5644; bugfix on
26308 - Fix builds when the path to sed, openssl, or sha1sum contains
26309 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
26311 - Correct our replacements for the timeradd() and timersub() functions
26312 on platforms that lack them (for example, Windows). The timersub()
26313 function is used when expiring circuits, while timeradd() is
26314 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
26315 bugfix on 0.2.2.24-alpha.
26316 - Fix the SOCKET_OK test that we use to tell when socket
26317 creation fails so that it works on Win64. Fixes part of bug 4533;
26318 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
26321 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
26322 Fixes bug 5346; bugfix on 0.0.8pre3.
26323 - Make our number-parsing functions always treat too-large values
26324 as an error, even when those values exceed the width of the
26325 underlying type. Previously, if the caller provided these
26326 functions with minima or maxima set to the extreme values of the
26327 underlying integer type, these functions would return those
26328 values on overflow rather than treating overflow as an error.
26329 Fixes part of bug 5786; bugfix on 0.0.9.
26330 - Older Linux kernels erroneously respond to strange nmap behavior
26331 by having accept() return successfully with a zero-length
26332 socket. When this happens, just close the connection. Previously,
26333 we would try harder to learn the remote address: but there was
26334 no such remote address to learn, and our method for trying to
26335 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
26336 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
26337 - Correct parsing of certain date types in parse_http_time().
26338 Without this patch, If-Modified-Since would behave
26339 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
26340 Esteban Manchado Velázques.
26341 - Change the BridgePassword feature (part of the "bridge community"
26342 design, which is not yet implemented) to use a time-independent
26343 comparison. The old behavior might have allowed an adversary
26344 to use timing to guess the BridgePassword value. Fixes bug 5543;
26345 bugfix on 0.2.0.14-alpha.
26346 - Detect and reject certain misformed escape sequences in
26347 configuration values. Previously, these values would cause us
26348 to crash if received in a torrc file or over an authenticated
26349 control port. Bug found by Esteban Manchado Velázquez, and
26350 independently by Robert Connolly from Matta Consulting who further
26351 noted that it allows a post-authentication heap overflow. Patch
26352 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
26353 bugfix on 0.2.0.16-alpha.
26354 - Fix a compile warning when using the --enable-openbsd-malloc
26355 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
26356 - During configure, detect when we're building with clang version
26357 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
26358 CFLAGS. clang doesn't support them yet.
26359 - When sending an HTTP/1.1 proxy request, include a Host header.
26360 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
26361 - Fix a NULL-pointer dereference on a badly formed SETCIRCUITPURPOSE
26362 command. Found by mikeyc. Fixes bug 5796; bugfix on 0.2.2.9-alpha.
26363 - If we hit the error case where routerlist_insert() replaces an
26364 existing (old) server descriptor, make sure to remove that
26365 server descriptor from the old_routers list. Fix related to bug
26366 1776. Bugfix on 0.2.2.18-alpha.
26368 o Minor bugfixes (documentation and log messages):
26369 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
26370 Fixes bug 4856; bugfix on Tor 0.0.6.
26371 - Update "ClientOnly" man page entry to explain that there isn't
26372 really any point to messing with it. Resolves ticket 5005.
26373 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
26374 directory authority option (introduced in Tor 0.2.2.34).
26375 - Downgrade the "We're missing a certificate" message from notice
26376 to info: people kept mistaking it for a real problem, whereas it
26377 is seldom the problem even when we are failing to bootstrap. Fixes
26378 bug 5067; bugfix on 0.2.0.10-alpha.
26379 - Correctly spell "connect" in a log message on failure to create a
26380 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta.
26381 - Clarify the behavior of MaxCircuitDirtiness with hidden service
26382 circuits. Fixes issue 5259.
26385 - Directory authorities now reject versions of Tor older than
26386 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
26387 inclusive. These versions accounted for only a small fraction of
26388 the Tor network, and have numerous known security issues. Resolves
26390 - Update to the May 1 2012 Maxmind GeoLite Country database.
26393 - When sending or relaying a RELAY_EARLY cell, we used to convert
26394 it to a RELAY cell if the connection was using the v1 link
26395 protocol. This was a workaround for older versions of Tor, which
26396 didn't handle RELAY_EARLY cells properly. Now that all supported
26397 versions can handle RELAY_EARLY cells, and now that we're enforcing
26398 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
26399 remove this workaround. Addresses bug 4786.
26402 Changes in version 0.2.3.15-alpha - 2012-04-30
26403 Tor 0.2.3.15-alpha fixes a variety of smaller bugs, including making
26404 the development branch build on Windows again.
26406 o Minor bugfixes (on 0.2.2.x and earlier):
26407 - Make sure that there are no unhandled pending TLS errors before
26408 reading from a TLS stream. We had checks in 0.1.0.3-rc, but
26409 lost them in 0.1.0.5-rc when we refactored read_to_buf_tls().
26410 Bugfix on 0.1.0.5-rc; fixes bug 4528.
26411 - Fix an assert that directory authorities could trigger on sighup
26412 during some configuration state transitions. We now don't treat
26413 it as a fatal error when the new descriptor we just generated in
26414 init_keys() isn't accepted. Fixes bug 4438; bugfix on 0.2.1.9-alpha.
26415 - After we pick a directory mirror, we would refuse to use it if
26416 it's in our ExcludeExitNodes list, resulting in mysterious failures
26417 to bootstrap for people who just wanted to avoid exiting from
26418 certain locations. Fixes bug 5623; bugfix on 0.2.2.25-alpha.
26419 - When building with --enable-static-tor on OpenBSD, do not
26420 erroneously attempt to link -lrt. Fixes bug 5103.
26422 o Minor bugfixes (on 0.2.3.x):
26423 - When Tor is built with kernel headers from a recent (last few
26424 years) Linux kernel, do not fail to run on older (pre-2.6.28
26425 Linux kernels). Fixes bug 5112; bugfix on 0.2.3.1-alpha.
26426 - Fix cross-compilation issues with mingw. Bugfixes on 0.2.3.6-alpha
26427 and 0.2.3.12-alpha.
26428 - Fix compilation with miniupnpc version 1.6; patch from
26429 Anthony G. Basile. Fixes bug 5434; bugfix on 0.2.3.12-alpha.
26430 - Fix compilation with MSVC, which had defined MS_WINDOWS. Bugfix
26431 on 0.2.3.13-alpha; found and fixed by Gisle Vanem.
26432 - Fix compilation on platforms without unistd.h, or where environ
26433 is defined in stdlib.h. Fixes bug 5704; bugfix on 0.2.3.13-alpha.
26436 - Directory authorities are now a little more lenient at accepting
26437 older router descriptors, or newer router descriptors that don't
26438 make big changes. This should help ameliorate past and future
26439 issues where routers think they have uploaded valid descriptors,
26440 but the authorities don't think so. Fix for ticket 2479.
26441 - Make the code that clients use to detect an address change be
26442 IPv6-aware, so that it won't fill clients' logs with error
26443 messages when trying to get the IPv4 address of an IPv6
26444 connection. Implements ticket 5537.
26446 o Removed features:
26447 - Remove the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays option;
26448 authorities needed to use it for a while to keep the network working
26449 as people upgraded to 0.2.1.31, 0.2.2.34, or 0.2.3.6-alpha, but
26450 that was six months ago. As of now, it should no longer be needed
26454 Changes in version 0.2.3.14-alpha - 2012-04-23
26455 Tor 0.2.3.14-alpha fixes yet more bugs to get us closer to a release
26456 candidate. It also dramatically speeds up AES: fast relays should
26457 consider switching to the newer OpenSSL library.
26459 o Directory authority changes:
26460 - Change IP address for ides (v3 directory authority), and rename
26464 - Avoid logging uninitialized data when unable to decode a hidden
26465 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
26466 - Avoid a client-side assertion failure when receiving an INTRODUCE2
26467 cell on a general purpose circuit. Fixes bug 5644; bugfix on
26469 - If authorities are unable to get a v2 consensus document from other
26470 directory authorities, they no longer fall back to fetching
26471 them from regular directory caches. Fixes bug 5635; bugfix on
26472 0.2.2.26-beta, where routers stopped downloading v2 consensus
26473 documents entirely.
26474 - When we start a Tor client with a normal consensus already cached,
26475 be willing to download a microdescriptor consensus. Fixes bug 4011;
26476 fix on 0.2.3.1-alpha.
26478 o Major features (performance):
26479 - When built to use OpenSSL 1.0.1, and built for an x86 or x86_64
26480 instruction set, take advantage of OpenSSL's AESNI, bitsliced, or
26481 vectorized AES implementations as appropriate. These can be much,
26482 much faster than other AES implementations.
26484 o Minor bugfixes (0.2.2.x and earlier):
26485 - Don't launch more than 10 service-side introduction-point circuits
26486 for a hidden service in five minutes. Previously, we would consider
26487 launching more introduction-point circuits if at least one second
26488 had passed without any introduction-point circuits failing. Fixes
26489 bug 4607; bugfix on 0.0.7pre1.
26490 - Change the BridgePassword feature (part of the "bridge community"
26491 design, which is not yet implemented) to use a time-independent
26492 comparison. The old behavior might have allowed an adversary
26493 to use timing to guess the BridgePassword value. Fixes bug 5543;
26494 bugfix on 0.2.0.14-alpha.
26495 - Enforce correct return behavior of tor_vsscanf() when the '%%'
26496 pattern is used. Fixes bug 5558. Bugfix on 0.2.1.13.
26497 - When sending an HTTP/1.1 proxy request, include a Host header.
26498 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
26499 - Don't log that we have "decided to publish new relay descriptor"
26500 unless we are actually publishing a descriptor. Fixes bug 3942;
26501 bugfix on 0.2.2.28-beta.
26503 o Minor bugfixes (0.2.3.x):
26504 - Fix a bug where a bridge authority crashes (on a failed assert)
26505 if it has seen no directory requests when it's time to write
26506 statistics to disk. Fixes bug 5508. Bugfix on 0.2.3.6-alpha.
26507 - Fix bug stomping on ORPort option NoListen and ignoring option
26508 NoAdvertise. Fixes bug 5151; bugfix on 0.2.3.9-alpha.
26509 - In the testsuite, provide a large enough buffer in the tor_sscanf
26510 unit test. Otherwise we'd overrun that buffer and crash during
26511 the unit tests. Found by weasel. Fixes bug 5449; bugfix on
26513 - Make sure we create the keys directory if it doesn't exist and we're
26514 about to store the dynamic Diffie-Hellman parameters. Fixes bug
26515 5572; bugfix on 0.2.3.13-alpha.
26516 - Fix a small memory leak when trying to decode incorrect base16
26517 authenticator during SAFECOOKIE authentication. Found by
26518 Coverity Scan. Fixes CID 507. Bugfix on 0.2.3.13-alpha.
26521 - Add more information to a log statement that might help track down
26522 bug 4091. If you're seeing "Bug: tor_addr_is_internal() called with a
26523 non-IP address" messages (or any Bug messages, for that matter!),
26524 please let us know about it.
26525 - Relays now understand an IPv6 address when they get one from a
26526 directory server. Resolves ticket 4875.
26527 - Resolve IPv6 addresses in bridge and entry statistics to country
26528 code "??" which means we at least count them. Resolves ticket 5053;
26529 improves on 0.2.3.9-alpha.
26530 - Update to the April 3 2012 Maxmind GeoLite Country database.
26531 - Begin a doc/state-contents.txt file to explain the contents of
26532 the Tor state file. Fixes bug 2987.
26534 o Default torrc changes:
26535 - Stop listing "socksport 9050" in torrc.sample. We open a socks
26536 port on 9050 by default anyway, so this should not change anything
26538 - Stop mentioning the deprecated *ListenAddress options in
26539 torrc.sample. Fixes bug 5438.
26540 - Document unit of bandwidth related options in sample torrc.
26543 o Removed features:
26544 - The "torify" script no longer supports the "tsocks" socksifier
26545 tool, since tsocks doesn't support DNS and UDP right for Tor.
26546 Everyone should be using torsocks instead. Fixes bugs 3530 and
26547 5180. Based on a patch by "ugh".
26549 o Code refactoring:
26550 - Change the symmetric cipher interface so that creating and
26551 initializing a stream cipher are no longer separate functions.
26552 - Remove all internal support for unpadded RSA. We never used it, and
26553 it would be a bad idea to start.
26556 Changes in version 0.2.3.13-alpha - 2012-03-26
26557 Tor 0.2.3.13-alpha fixes a variety of stability and correctness bugs
26558 in managed pluggable transports, as well as providing other cleanups
26559 that get us closer to a release candidate.
26561 o Directory authority changes:
26562 - Change IP address for maatuska (v3 directory authority).
26565 - Provide controllers with a safer way to implement the cookie
26566 authentication mechanism. With the old method, if another locally
26567 running program could convince a controller that it was the Tor
26568 process, then that program could trick the controller into telling
26569 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
26570 authentication method uses a challenge-response approach to prevent
26571 this attack. Fixes bug 5185, implements proposal 193.
26572 - Never use a bridge or a controller-supplied node as an exit, even
26573 if its exit policy allows it. Found by wanoskarnet. Fixes bug
26574 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
26575 and 0.2.0.3-alpha (for bridge-purpose descriptors).
26576 - Only build circuits if we have a sufficient threshold of the total
26577 descriptors that are marked in the consensus with the "Exit"
26578 flag. This mitigates an attack proposed by wanoskarnet, in which
26579 all of a client's bridges collude to restrict the exit nodes that
26580 the client knows about. Fixes bug 5343.
26582 o Major bugfixes (on Tor 0.2.3.x):
26583 - Avoid an assert when managed proxies like obfsproxy are configured,
26584 and we receive HUP signals or setconf attempts too rapidly. This
26585 situation happens most commonly when Vidalia tries to attach to
26586 Tor or tries to configure the Tor it's attached to. Fixes bug 5084;
26587 bugfix on 0.2.3.6-alpha.
26588 - Fix a relay-side pluggable transports bug where managed proxies were
26589 unreachable from the Internet, because Tor asked them to bind on
26590 localhost. Fixes bug 4725; bugfix on 0.2.3.9-alpha.
26591 - Stop discarding command-line arguments when TestingTorNetwork
26592 is set. Discovered by Kevin Bauer. Fixes bug 5373; bugfix on
26593 0.2.3.9-alpha, where task 4552 added support for two layers of
26595 - Resume allowing the unit tests to run in gdb. This was accidentally
26596 made impossible when the DisableDebuggerAttachment option was
26597 introduced. Fixes bug 5448; bugfix on 0.2.3.9-alpha.
26598 - Resume building with nat-pmp support. Fixes bug 4955; bugfix on
26599 0.2.3.11-alpha. Reported by Anthony G. Basile.
26601 o Minor bugfixes (on 0.2.2.x and earlier):
26602 - Ensure we don't cannibalize circuits that are longer than three hops
26603 already, so we don't end up making circuits with 5 or more
26604 hops. Patch contributed by wanoskarnet. Fixes bug 5231; bugfix on
26605 0.1.0.1-rc which introduced cannibalization.
26606 - Detect and reject certain misformed escape sequences in
26607 configuration values. Previously, these values would cause us
26608 to crash if received in a torrc file or over an authenticated
26609 control port. Bug found by Esteban Manchado Velázquez, and
26610 independently by Robert Connolly from Matta Consulting who further
26611 noted that it allows a post-authentication heap overflow. Patch
26612 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
26613 bugfix on 0.2.0.16-alpha.
26614 - Fix a compile warning when using the --enable-openbsd-malloc
26615 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
26616 - Directory caches no longer refuse to clean out descriptors because
26617 of missing v2 networkstatus documents, unless they're configured
26618 to retrieve v2 networkstatus documents. Fixes bug 4838; bugfix on
26619 0.2.2.26-beta. Patch by Daniel Bryg.
26620 - Update to the latest version of the tinytest unit testing framework.
26621 This includes a couple of bugfixes that can be relevant for
26622 running forked unit tests on Windows, and removes all reserved
26625 o Minor bugfixes (on 0.2.3.x):
26626 - On a failed pipe() call, don't leak file descriptors. Fixes bug
26627 4296; bugfix on 0.2.3.1-alpha.
26628 - Spec conformance: on a v3 handshake, do not send a NETINFO cell
26629 until after we have received a CERTS cell. Fixes bug 4361; bugfix
26630 on 0.2.3.6-alpha. Patch by "frosty".
26631 - When binding to an IPv6 address, set the IPV6_V6ONLY socket
26632 option, so that the IP stack doesn't decide to use it for IPv4
26633 too. Fixes bug 4760; bugfix on 0.2.3.9-alpha.
26634 - Ensure that variables set in Tor's environment cannot override
26635 environment variables that Tor passes to a managed
26636 pluggable-transport proxy. Previously, Tor would pass every
26637 variable in its environment to managed proxies along with the new
26638 ones, in such a way that on many operating systems, the inherited
26639 environment variables would override those which Tor tried to
26640 explicitly set. Bugfix on 0.2.3.12-alpha for most Unixoid systems;
26641 bugfix on 0.2.3.9-alpha for Windows.
26644 - A wide variety of new unit tests by Esteban Manchado Velázquez.
26645 - Shorten links in the tor-exit-notice file. Patch by Christian Kujau.
26646 - Update to the March 6 2012 Maxmind GeoLite Country database.
26649 Changes in version 0.2.3.12-alpha - 2012-02-13
26650 Tor 0.2.3.12-alpha lets fast exit relays scale better, allows clients
26651 to use bridges that run Tor 0.2.2.x, and resolves several big bugs
26652 when Tor is configured to use a pluggable transport like obfsproxy.
26655 - Fix builds when the path to sed, openssl, or sha1sum contains
26656 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
26658 - Set the SO_REUSEADDR socket option before we call bind() on outgoing
26659 connections. This change should allow busy exit relays to stop
26660 running out of available sockets as quickly. Fixes bug 4950;
26661 bugfix on 0.2.2.26-beta.
26662 - Allow 0.2.3.x clients to use 0.2.2.x bridges. Previously the client
26663 would ask the bridge for microdescriptors, which are only supported
26664 in 0.2.3.x, and then fail to bootstrap when it didn't get the
26665 answers it wanted. Fixes bug 4013; bugfix on 0.2.3.2-alpha.
26666 - Properly set up obfsproxy's environment when in managed mode. The
26667 Tor Browser Bundle needs LD_LIBRARY_PATH to be passed to obfsproxy,
26668 and when you run your Tor as a daemon, there's no HOME. Fixes bugs
26669 5076 and 5082; bugfix on 0.2.3.6-alpha.
26672 - Use the dead_strip option when building Tor on OS X. This reduces
26673 binary size by almost 19% when linking openssl and libevent
26674 statically, which we do for Tor Browser Bundle.
26675 - Fix broken URLs in the sample torrc file, and tell readers about
26676 the OutboundBindAddress, ExitPolicyRejectPrivate, and
26677 PublishServerDescriptor options. Addresses bug 4652.
26678 - Update to the February 7 2012 Maxmind GeoLite Country database.
26681 - Downgrade the "We're missing a certificate" message from notice
26682 to info: people kept mistaking it for a real problem, whereas it
26683 is seldom the problem even when we are failing to bootstrap. Fixes
26684 bug 5067; bugfix on 0.2.0.10-alpha.
26685 - Don't put "TOR_PT_EXTENDED_SERVER_PORT=127.0.0.1:4200" in a
26686 managed pluggable transport server proxy's environment.
26687 Previously, we would put it there, even though Tor doesn't
26688 implement an 'extended server port' yet, and even though Tor
26689 almost certainly isn't listening at that address. For now, we set
26690 it to an empty string to avoid crashing older obfsproxies. Bugfix
26692 - Log the heartbeat message every HeartbeatPeriod seconds, not every
26693 HeartbeatPeriod + 1 seconds. Fixes bug 4942; bugfix on
26694 0.2.3.1-alpha. Bug reported by Scott Bennett.
26695 - Calculate absolute paths correctly on Windows. Fixes bug 4973;
26696 bugfix on 0.2.3.11-alpha.
26697 - Update "ClientOnly" man page entry to explain that there isn't
26698 really any point to messing with it. Resolves ticket 5005.
26699 - Use the correct CVE number for CVE-2011-4576 in our comments and
26700 log messages. Found by "fermenthor". Resolves bug 5066; bugfix on
26703 o Code simplifications and refactoring:
26704 - Use the _WIN32 macro throughout our code to detect Windows.
26705 (Previously we had used the obsolete 'WIN32' and the idiosyncratic
26709 Changes in version 0.2.3.11-alpha - 2012-01-22
26710 Tor 0.2.3.11-alpha marks feature-freeze for the 0.2.3 tree. It deploys
26711 the last step of the plan to limit maximum circuit length, includes
26712 a wide variety of hidden service performance and correctness fixes,
26713 works around an OpenSSL security flaw if your distro is too stubborn
26714 to upgrade, and fixes a bunch of smaller issues.
26717 - Now that Tor 0.2.0.x is completely deprecated, enable the final
26718 part of "Proposal 110: Avoiding infinite length circuits" by
26719 refusing all circuit-extend requests that do not use a relay_early
26720 cell. This change helps Tor resist a class of denial-of-service
26721 attacks by limiting the maximum circuit length.
26722 - Adjust the number of introduction points that a hidden service
26723 will try to maintain based on how long its introduction points
26724 remain in use and how many introductions they handle. Fixes
26726 - Try to use system facilities for enumerating local interface
26727 addresses, before falling back to our old approach (which was
26728 binding a UDP socket, and calling getsockname() on it). That
26729 approach was scaring OS X users whose draconian firewall
26730 software warned about binding to UDP sockets, regardless of
26731 whether packets were sent. Now we try to use getifaddrs(),
26732 SIOCGIFCONF, or GetAdaptersAddresses(), depending on what the
26733 system supports. Resolves ticket 1827.
26735 o Major security workaround:
26736 - When building or running with any version of OpenSSL earlier
26737 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
26738 versions have a bug (CVE-2011-4576) in which their block cipher
26739 padding includes uninitialized data, potentially leaking sensitive
26740 information to any peer with whom they make a SSLv3 connection. Tor
26741 does not use SSL v3 by default, but a hostile client or server
26742 could force an SSLv3 connection in order to gain information that
26743 they shouldn't have been able to get. The best solution here is to
26744 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
26745 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
26746 to make sure that the bug can't happen.
26749 - Fix the SOCKET_OK test that we use to tell when socket
26750 creation fails so that it works on Win64. Fixes part of bug 4533;
26751 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
26752 - Correct our replacements for the timeradd() and timersub() functions
26753 on platforms that lack them (for example, Windows). The timersub()
26754 function is used when expiring circuits, while timeradd() is
26755 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
26756 bugfix on 0.2.2.24-alpha and 0.2.3.1-alpha.
26757 - Do not use OpenSSL 1.0.0's counter mode: it has a critical bug
26758 that was fixed in OpenSSL 1.0.0a. We test for the counter mode
26759 bug at runtime, not compile time, because some distributions hack
26760 their OpenSSL to mis-report its version. Fixes bug 4779; bugfix
26761 on 0.2.3.9-alpha. Found by Pascal.
26763 o Minor features (controller):
26764 - Use absolute path names when reporting the torrc filename in the
26765 control protocol, so a controller can more easily find the torrc
26766 file. Resolves bug 1101.
26767 - Extend the control protocol to report flags that control a circuit's
26768 path selection in CIRC events and in replies to 'GETINFO
26769 circuit-status'. Implements part of ticket 2411.
26770 - Extend the control protocol to report the hidden service address
26771 and current state of a hidden-service-related circuit in CIRC
26772 events and in replies to 'GETINFO circuit-status'. Implements part
26774 - When reporting the path to the cookie file to the controller,
26775 give an absolute path. Resolves ticket 4881.
26776 - Allow controllers to request an event notification whenever a
26777 circuit is cannibalized or its purpose is changed. Implements
26778 part of ticket 3457.
26779 - Include the creation time of a circuit in CIRC and CIRC2
26780 control-port events and the list produced by the 'GETINFO
26781 circuit-status' control-port command.
26783 o Minor features (directory authorities):
26784 - Directory authorities now reject versions of Tor older than
26785 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
26786 inclusive. These versions accounted for only a small fraction of
26787 the Tor network, and have numerous known security issues. Resolves
26789 - Authority operators can now vote for all relays in a given
26790 set of countries to be BadDir/BadExit/Invalid/Rejected.
26791 - Provide two consensus parameters (FastFlagMinThreshold and
26792 FastFlagMaxThreshold) to control the range of allowable bandwidths
26793 for the Fast directory flag. These allow authorities to run
26794 experiments on appropriate requirements for being a "Fast" node.
26795 The AuthDirFastGuarantee config value still applies. Implements
26797 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
26798 directory authority option (introduced in Tor 0.2.2.34).
26800 o Minor features (other):
26801 - Don't disable the DirPort when we cannot exceed our AccountingMax
26802 limit during this interval because the effective bandwidthrate is
26803 low enough. This is useful in a situation where AccountMax is only
26804 used as an additional safeguard or to provide statistics.
26805 - Prepend an informative header to generated dynamic_dh_params files.
26806 - If EntryNodes are given, but UseEntryGuards is set to 0, warn that
26807 EntryNodes will have no effect. Resolves issue 2571.
26808 - Log more useful messages when we fail to disable debugger
26810 - Log which authority we're missing votes from when we go to fetch
26811 them from the other auths.
26812 - Log (at debug level) whenever a circuit's purpose is changed.
26813 - Add missing documentation for the MaxClientCircuitsPending,
26814 UseMicrodescriptors, UserspaceIOCPBuffers, and
26815 _UseFilteringSSLBufferevents options, all introduced during
26816 the 0.2.3.x series.
26817 - Update to the January 3 2012 Maxmind GeoLite Country database.
26819 o Minor bugfixes (hidden services):
26820 - Don't close hidden service client circuits which have almost
26821 finished connecting to their destination when they reach
26822 the normal circuit-build timeout. Previously, we would close
26823 introduction circuits which are waiting for an acknowledgement
26824 from the introduction point, and rendezvous circuits which have
26825 been specified in an INTRODUCE1 cell sent to a hidden service,
26826 after the normal CBT. Now, we mark them as 'timed out', and launch
26827 another rendezvous attempt in parallel. This behavior change can
26828 be disabled using the new CloseHSClientCircuitsImmediatelyOnTimeout
26829 option. Fixes part of bug 1297; bugfix on 0.2.2.2-alpha.
26830 - Don't close hidden-service-side rendezvous circuits when they
26831 reach the normal circuit-build timeout. This behavior change can
26832 be disabled using the new
26833 CloseHSServiceRendCircuitsImmediatelyOnTimeout option. Fixes the
26834 remaining part of bug 1297; bugfix on 0.2.2.2-alpha.
26835 - Make sure we never mark the wrong rendezvous circuit as having
26836 had its introduction cell acknowledged by the introduction-point
26837 relay. Previously, when we received an INTRODUCE_ACK cell on a
26838 client-side hidden-service introduction circuit, we might have
26839 marked a rendezvous circuit other than the one we specified in
26840 the INTRODUCE1 cell as INTRO_ACKED, which would have produced
26841 a warning message and interfered with the hidden service
26842 connection-establishment process. Fixes bug 4759; bugfix on
26843 0.2.3.3-alpha, when we added the stream-isolation feature which
26844 might cause Tor to open multiple rendezvous circuits for the same
26846 - Don't trigger an assertion failure when we mark a new client-side
26847 hidden-service introduction circuit for close during the process
26848 of creating it. Fixes bug 4796; bugfix on 0.2.3.6-alpha. Reported
26851 o Minor bugfixes (log messages):
26852 - Correctly spell "connect" in a log message on failure to create a
26853 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta and
26855 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
26856 Fixes bug 4856; bugfix on Tor 0.0.6.
26857 - Fix the log message describing how we work around discovering
26858 that our version is the ill-fated OpenSSL 0.9.8l. Fixes bug
26859 4837; bugfix on 0.2.2.9-alpha.
26860 - When logging about a disallowed .exit name, do not also call it
26861 an "invalid onion address". Fixes bug 3325; bugfix on 0.2.2.9-alpha.
26863 o Minor bugfixes (build fixes):
26864 - During configure, detect when we're building with clang version
26865 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
26866 CFLAGS. clang doesn't support them yet.
26867 - During configure, search for library containing cos function as
26868 libm lives in libcore on some platforms (BeOS/Haiku). Linking
26869 against libm was hard-coded before. Fixes the first part of bug
26870 4727; bugfix on 0.2.2.2-alpha. Patch and analysis by Martin Hebnes
26872 - Detect attempts to build Tor on (as yet hypothetical) versions
26873 of Windows where sizeof(intptr_t) != sizeof(SOCKET). Partial
26874 fix for bug 4533. Bugfix on 0.2.2.28-beta.
26875 - Preprocessor directives should not be put inside the arguments
26876 of a macro. This would break compilation with GCC releases prior
26877 to version 3.3. We would never recommend such an old GCC version,
26878 but it is apparently required for binary compatibility on some
26879 platforms (namely, certain builds of Haiku). Fixes the other part
26880 of bug 4727; bugfix on 0.2.3.3-alpha. Patch and analysis by Martin
26883 o Minor bugfixes (other):
26884 - Older Linux kernels erroneously respond to strange nmap behavior
26885 by having accept() return successfully with a zero-length
26886 socket. When this happens, just close the connection. Previously,
26887 we would try harder to learn the remote address: but there was
26888 no such remote address to learn, and our method for trying to
26889 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
26890 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
26891 - Fix null-pointer access that could occur if TLS allocation failed.
26892 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un". This was
26893 erroneously listed as fixed in 0.2.3.9-alpha, but the fix had
26894 accidentally been reverted.
26895 - Fix our implementation of crypto_random_hostname() so it can't
26896 overflow on ridiculously large inputs. (No Tor version has ever
26897 provided this kind of bad inputs, but let's be correct in depth.)
26898 Fixes bug 4413; bugfix on 0.2.2.9-alpha. Fix by Stephen Palmateer.
26899 - Find more places in the code that should have been testing for
26900 invalid sockets using the SOCKET_OK macro. Required for a fix
26901 for bug 4533. Bugfix on 0.2.2.28-beta.
26902 - Fix an assertion failure when, while running with bufferevents, a
26903 connection finishes connecting after it is marked for close, but
26904 before it is closed. Fixes bug 4697; bugfix on 0.2.3.1-alpha.
26905 - test_util_spawn_background_ok() hardcoded the expected value
26906 for ENOENT to 2. This isn't portable as error numbers are
26907 platform specific, and particularly the hurd has ENOENT at
26908 0x40000002. Construct expected string at runtime, using the correct
26909 value for ENOENT. Fixes bug 4733; bugfix on 0.2.3.1-alpha.
26910 - Reject attempts to disable DisableDebuggerAttachment while Tor is
26911 running. Fixes bug 4650; bugfix on 0.2.3.9-alpha.
26912 - Use an appropriate-width type for sockets in tor-fw-helper on
26913 win64. Fixes bug 1983 at last. Bugfix on 0.2.3.9-alpha.
26916 - When sending or relaying a RELAY_EARLY cell, we used to convert
26917 it to a RELAY cell if the connection was using the v1 link
26918 protocol. This was a workaround for older versions of Tor, which
26919 didn't handle RELAY_EARLY cells properly. Now that all supported
26920 versions can handle RELAY_EARLY cells, and now that we're enforcing
26921 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
26922 remove this workaround. Addresses bug 4786.
26924 o Code simplifications and refactoring:
26925 - Use OpenSSL's built-in SSL_state_string_long() instead of our
26926 own homebrewed ssl_state_to_string() replacement. Patch from
26927 Emile Snyder. Fixes bug 4653.
26928 - Use macros to indicate OpenSSL versions, so we don't need to worry
26929 about accidental hexadecimal bit shifts.
26930 - Remove some workaround code for OpenSSL 0.9.6 (which is no longer
26932 - Convert more instances of tor_snprintf+tor_strdup into tor_asprintf.
26933 - Use the smartlist_add_asprintf() alias more consistently.
26934 - Use a TOR_INVALID_SOCKET macro when initializing a socket to an
26935 invalid value, rather than just -1.
26936 - Rename a handful of old identifiers, mostly related to crypto
26937 structures and crypto functions. By convention, our "create an
26938 object" functions are called "type_new()", our "free an object"
26939 functions are called "type_free()", and our types indicate that
26940 they are types only with a final "_t". But a handful of older
26941 types and functions broke these rules, with function names like
26942 "type_create" or "subsystem_op_type", or with type names like
26946 Changes in version 0.2.3.10-alpha - 2011-12-16
26947 Tor 0.2.3.10-alpha fixes a critical heap-overflow security issue in
26948 Tor's buffers code. Absolutely everybody should upgrade.
26950 The bug relied on an incorrect calculation when making data continuous
26951 in one of our IO buffers, if the first chunk of the buffer was
26952 misaligned by just the wrong amount. The miscalculation would allow an
26953 attacker to overflow a piece of heap-allocated memory. To mount this
26954 attack, the attacker would need to either open a SOCKS connection to
26955 Tor's SocksPort (usually restricted to localhost), or target a Tor
26956 instance configured to make its connections through a SOCKS proxy
26957 (which Tor does not do by default).
26959 Good security practice requires that all heap-overflow bugs should be
26960 presumed to be exploitable until proven otherwise, so we are treating
26961 this as a potential code execution attack. Please upgrade immediately!
26962 This bug does not affect bufferevents-based builds of Tor. Special
26963 thanks to "Vektor" for reporting this issue to us!
26965 This release also contains a few minor bugfixes for issues discovered
26969 - Fix a heap overflow bug that could occur when trying to pull
26970 data into the first chunk of a buffer, when that chunk had
26971 already had some data drained from it. Fixes CVE-2011-2778;
26972 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
26975 - If we can't attach streams to a rendezvous circuit when we
26976 finish connecting to a hidden service, clear the rendezvous
26977 circuit's stream-isolation state and try to attach streams
26978 again. Previously, we cleared rendezvous circuits' isolation
26979 state either too early (if they were freshly built) or not at all
26980 (if they had been built earlier and were cannibalized). Bugfix on
26981 0.2.3.3-alpha; fixes bug 4655.
26982 - Fix compilation of the libnatpmp helper on non-Windows. Bugfix on
26983 0.2.3.9-alpha; fixes bug 4691. Reported by Anthony G. Basile.
26984 - Fix an assertion failure when a relay with accounting enabled
26985 starts up while dormant. Fixes bug 4702; bugfix on 0.2.3.9-alpha.
26988 - Update to the December 6 2011 Maxmind GeoLite Country database.
26991 Changes in version 0.2.2.35 - 2011-12-16
26992 Tor 0.2.2.35 fixes a critical heap-overflow security issue in Tor's
26993 buffers code. Absolutely everybody should upgrade.
26995 The bug relied on an incorrect calculation when making data continuous
26996 in one of our IO buffers, if the first chunk of the buffer was
26997 misaligned by just the wrong amount. The miscalculation would allow an
26998 attacker to overflow a piece of heap-allocated memory. To mount this
26999 attack, the attacker would need to either open a SOCKS connection to
27000 Tor's SocksPort (usually restricted to localhost), or target a Tor
27001 instance configured to make its connections through a SOCKS proxy
27002 (which Tor does not do by default).
27004 Good security practice requires that all heap-overflow bugs should be
27005 presumed to be exploitable until proven otherwise, so we are treating
27006 this as a potential code execution attack. Please upgrade immediately!
27007 This bug does not affect bufferevents-based builds of Tor. Special
27008 thanks to "Vektor" for reporting this issue to us!
27010 Tor 0.2.2.35 also fixes several bugs in previous versions, including
27011 crash bugs for unusual configurations, and a long-term bug that
27012 would prevent Tor from starting on Windows machines with draconian
27015 With this release, we remind everyone that 0.2.0.x has reached its
27016 formal end-of-life. Those Tor versions have many known flaws, and
27017 nobody should be using them. You should upgrade -- ideally to the
27018 0.2.2.x series. If you're using a Linux or BSD and its packages are
27019 obsolete, stop using those packages and upgrade anyway.
27021 The Tor 0.2.1.x series is also approaching its end-of-life: it will no
27022 longer receive support after some time in early 2012.
27025 - Fix a heap overflow bug that could occur when trying to pull
27026 data into the first chunk of a buffer, when that chunk had
27027 already had some data drained from it. Fixes CVE-2011-2778;
27028 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
27029 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
27030 that it doesn't attempt to allocate a socketpair. This could cause
27031 some problems on Windows systems with overzealous firewalls. Fix for
27032 bug 4457; workaround for Libevent versions 2.0.1-alpha through
27034 - If we mark an OR connection for close based on a cell we process,
27035 don't process any further cells on it. We already avoid further
27036 reads on marked-for-close connections, but now we also discard the
27037 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
27038 which was the first version where we might mark a connection for
27039 close based on processing a cell on it.
27040 - Correctly sanity-check that we don't underflow on a memory
27041 allocation (and then assert) for hidden service introduction
27042 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
27043 bugfix on 0.2.1.5-alpha.
27044 - Fix a memory leak when we check whether a hidden service
27045 descriptor has any usable introduction points left. Fixes bug
27046 4424. Bugfix on 0.2.2.25-alpha.
27047 - Don't crash when we're running as a relay and don't have a GeoIP
27048 file. Bugfix on 0.2.2.34; fixes bug 4340. This backports a fix
27049 we've had in the 0.2.3.x branch already.
27050 - When running as a client, do not print a misleading (and plain
27051 wrong) log message that we're collecting "directory request"
27052 statistics: clients don't collect statistics. Also don't create a
27053 useless (because empty) stats file in the stats/ directory. Fixes
27054 bug 4353; bugfix on 0.2.2.34.
27057 - Detect failure to initialize Libevent. This fix provides better
27058 detection for future instances of bug 4457.
27059 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
27060 function. This was eating up hideously large amounts of time on some
27061 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
27062 - Resolve an integer overflow bug in smartlist_ensure_capacity().
27063 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
27065 - Don't warn about unused log_mutex in log.c when building with
27066 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
27067 0.1.0.6-rc which introduced --disable-threads.
27068 - When configuring, starting, or stopping an NT service, stop
27069 immediately after the service configuration attempt has succeeded
27070 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
27071 - When sending a NETINFO cell, include the original address
27072 received for the other side, not its canonical address. Found
27073 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
27074 - Fix a typo in a hibernation-related log message. Fixes bug 4331;
27075 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
27076 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
27077 occurred when a client tried to fetch a descriptor for a bridge
27078 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
27079 - Backport fixes for a pair of compilation warnings on Windows.
27080 Fixes bug 4521; bugfix on 0.2.2.28-beta and on 0.2.2.29-beta.
27081 - If we had ever tried to call tor_addr_to_str on an address of
27082 unknown type, we would have done a strdup on an uninitialized
27083 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
27084 Reported by "troll_un".
27085 - Correctly detect and handle transient lookup failures from
27086 tor_addr_lookup. Fixes bug 4530; bugfix on 0.2.1.5-alpha.
27087 Reported by "troll_un".
27088 - Fix null-pointer access that could occur if TLS allocation failed.
27089 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
27090 - Use tor_socket_t type for listener argument to accept(). Fixes bug
27091 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
27094 - Add two new config options for directory authorities:
27095 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
27096 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
27097 that is always sufficient to satisfy the bandwidth requirement for
27098 the Guard flag. Now it will be easier for researchers to simulate
27099 Tor networks with different values. Resolves ticket 4484.
27100 - When Tor ignores a hidden service specified in its configuration,
27101 include the hidden service's directory in the warning message.
27102 Previously, we would only tell the user that some hidden service
27103 was ignored. Bugfix on 0.0.6; fixes bug 4426.
27104 - Update to the December 6 2011 Maxmind GeoLite Country database.
27106 o Packaging changes:
27107 - Make it easier to automate expert package builds on Windows,
27108 by removing an absolute path from makensis.exe command.
27111 Changes in version 0.2.1.32 - 2011-12-16
27112 Tor 0.2.1.32 backports important security and privacy fixes for
27113 oldstable. This release is intended only for package maintainers and
27114 others who cannot use the 0.2.2 stable series. All others should be
27115 using Tor 0.2.2.x or newer.
27117 The Tor 0.2.1.x series will reach formal end-of-life some time in
27118 early 2012; we will stop releasing patches for it then.
27120 o Major bugfixes (also included in 0.2.2.x):
27121 - Correctly sanity-check that we don't underflow on a memory
27122 allocation (and then assert) for hidden service introduction
27123 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
27124 bugfix on 0.2.1.5-alpha.
27125 - Fix a heap overflow bug that could occur when trying to pull
27126 data into the first chunk of a buffer, when that chunk had
27127 already had some data drained from it. Fixes CVE-2011-2778;
27128 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
27131 - Update to the December 6 2011 Maxmind GeoLite Country database.
27134 Changes in version 0.2.3.9-alpha - 2011-12-08
27135 Tor 0.2.3.9-alpha introduces initial IPv6 support for bridges, adds
27136 a "DisableNetwork" security feature that bundles can use to avoid
27137 touching the network until bridges are configured, moves forward on
27138 the pluggable transport design, fixes a flaw in the hidden service
27139 design that unnecessarily prevented clients with wrong clocks from
27140 reaching hidden services, and fixes a wide variety of other issues.
27143 - Clients can now connect to private bridges over IPv6. Bridges
27144 still need at least one IPv4 address in order to connect to
27145 other relays. Note that we don't yet handle the case where the
27146 user has two bridge lines for the same bridge (one IPv4, one
27147 IPv6). Implements parts of proposal 186.
27148 - New "DisableNetwork" config option to prevent Tor from launching any
27149 connections or accepting any connections except on a control port.
27150 Bundles and controllers can set this option before letting Tor talk
27151 to the rest of the network, for example to prevent any connections
27152 to a non-bridge address. Packages like Orbot can also use this
27153 option to instruct Tor to save power when the network is off.
27154 - Clients and bridges can now be configured to use a separate
27155 "transport" proxy. This approach makes the censorship arms race
27156 easier by allowing bridges to use protocol obfuscation plugins. It
27157 implements the "managed proxy" part of proposal 180 (ticket 3472).
27158 - When using OpenSSL 1.0.0 or later, use OpenSSL's counter mode
27159 implementation. It makes AES_CTR about 7% faster than our old one
27160 (which was about 10% faster than the one OpenSSL used to provide).
27161 Resolves ticket 4526.
27162 - Add a "tor2web mode" for clients that want to connect to hidden
27163 services non-anonymously (and possibly more quickly). As a safety
27164 measure to try to keep users from turning this on without knowing
27165 what they are doing, tor2web mode must be explicitly enabled at
27166 compile time, and a copy of Tor compiled to run in tor2web mode
27167 cannot be used as a normal Tor client. Implements feature 2553.
27168 - Add experimental support for running on Windows with IOCP and no
27169 kernel-space socket buffers. This feature is controlled by a new
27170 "UserspaceIOCPBuffers" config option (off by default), which has
27171 no effect unless Tor has been built with support for bufferevents,
27172 is running on Windows, and has enabled IOCP. This may, in the long
27173 run, help solve or mitigate bug 98.
27174 - Use a more secure consensus parameter voting algorithm. Now at
27175 least three directory authorities or a majority of them must
27176 vote on a given parameter before it will be included in the
27177 consensus. Implements proposal 178.
27180 - Hidden services now ignore the timestamps on INTRODUCE2 cells.
27181 They used to check that the timestamp was within 30 minutes
27182 of their system clock, so they could cap the size of their
27183 replay-detection cache, but that approach unnecessarily refused
27184 service to clients with wrong clocks. Bugfix on 0.2.1.6-alpha, when
27185 the v3 intro-point protocol (the first one which sent a timestamp
27186 field in the INTRODUCE2 cell) was introduced; fixes bug 3460.
27187 - Only use the EVP interface when AES acceleration is enabled,
27188 to avoid a 5-7% performance regression. Resolves issue 4525;
27189 bugfix on 0.2.3.8-alpha.
27191 o Privacy/anonymity features (bridge detection):
27192 - Make bridge SSL certificates a bit more stealthy by using random
27193 serial numbers, in the same fashion as OpenSSL when generating
27194 self-signed certificates. Implements ticket 4584.
27195 - Introduce a new config option "DynamicDHGroups", enabled by
27196 default, which provides each bridge with a unique prime DH modulus
27197 to be used during SSL handshakes. This option attempts to help
27198 against censors who might use the Apache DH modulus as a static
27199 identifier for bridges. Addresses ticket 4548.
27201 o Minor features (new/different config options):
27202 - New configuration option "DisableDebuggerAttachment" (on by default)
27203 to prevent basic debugging attachment attempts by other processes.
27204 Supports Mac OS X and Gnu/Linux. Resolves ticket 3313.
27205 - Allow MapAddress directives to specify matches against super-domains,
27206 as in "MapAddress *.torproject.org *.torproject.org.torserver.exit".
27207 Implements issue 933.
27208 - Slightly change behavior of "list" options (that is, config
27209 options that can appear more than once) when they appear both in
27210 torrc and on the command line. Previously, the command-line options
27211 would be appended to the ones from torrc. Now, the command-line
27212 options override the torrc options entirely. This new behavior
27213 allows the user to override list options (like exit policies and
27214 ports to listen on) from the command line, rather than simply
27215 appending to the list.
27216 - You can get the old (appending) command-line behavior for "list"
27217 options by prefixing the option name with a "+".
27218 - You can remove all the values for a "list" option from the command
27219 line without adding any new ones by prefixing the option name
27221 - Add experimental support for a "defaults" torrc file to be parsed
27222 before the regular torrc. Torrc options override the defaults file's
27223 options in the same way that the command line overrides the torrc.
27224 The SAVECONF controller command saves only those options which
27225 differ between the current configuration and the defaults file. HUP
27226 reloads both files. (Note: This is an experimental feature; its
27227 behavior will probably be refined in future 0.2.3.x-alpha versions
27228 to better meet packagers' needs.) Implements task 4552.
27231 - Try to make the introductory warning message that Tor prints on
27232 startup more useful for actually finding help and information.
27233 Resolves ticket 2474.
27234 - Running "make version" now displays the version of Tor that
27235 we're about to build. Idea from katmagic; resolves issue 4400.
27236 - Expire old or over-used hidden service introduction points.
27237 Required by fix for bug 3460.
27238 - Move the replay-detection cache for the RSA-encrypted parts of
27239 INTRODUCE2 cells to the introduction point data structures.
27240 Previously, we would use one replay-detection cache per hidden
27241 service. Required by fix for bug 3460.
27242 - Reduce the lifetime of elements of hidden services' Diffie-Hellman
27243 public key replay-detection cache from 60 minutes to 5 minutes. This
27244 replay-detection cache is now used only to detect multiple
27245 INTRODUCE2 cells specifying the same rendezvous point, so we can
27246 avoid launching multiple simultaneous attempts to connect to it.
27248 o Minor bugfixes (on Tor 0.2.2.x and earlier):
27249 - Resolve an integer overflow bug in smartlist_ensure_capacity().
27250 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
27252 - Fix a minor formatting issue in one of tor-gencert's error messages.
27254 - Prevent a false positive from the check-spaces script, by disabling
27255 the "whitespace between function name and (" check for functions
27257 - Fix a log message suggesting that people contact a non-existent
27258 email address. Fixes bug 3448.
27259 - Fix null-pointer access that could occur if TLS allocation failed.
27260 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
27261 - Report a real bootstrap problem to the controller on router
27262 identity mismatch. Previously we just said "foo", which probably
27263 made a lot of sense at the time. Fixes bug 4169; bugfix on
27265 - If we had ever tried to call tor_addr_to_str() on an address of
27266 unknown type, we would have done a strdup() on an uninitialized
27267 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
27268 Reported by "troll_un".
27269 - Correctly detect and handle transient lookup failures from
27270 tor_addr_lookup(). Fixes bug 4530; bugfix on 0.2.1.5-alpha.
27271 Reported by "troll_un".
27272 - Use tor_socket_t type for listener argument to accept(). Fixes bug
27273 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
27274 - Initialize conn->addr to a valid state in spawn_cpuworker(). Fixes
27275 bug 4532; found by "troll_un".
27277 o Minor bugfixes (on Tor 0.2.3.x):
27278 - Fix a compile warning in tor_inet_pton(). Bugfix on 0.2.3.8-alpha;
27280 - Don't send two ESTABLISH_RENDEZVOUS cells when opening a new
27281 circuit for use as a hidden service client's rendezvous point.
27282 Fixes bugs 4641 and 4171; bugfix on 0.2.3.3-alpha. Diagnosed
27283 with help from wanoskarnet.
27284 - Restore behavior of overriding SocksPort, ORPort, and similar
27285 options from the command line. Bugfix on 0.2.3.3-alpha.
27288 - Properly handle the case where the build-tree is not the same
27289 as the source tree when generating src/common/common_sha1.i,
27290 src/or/micro-revision.i, and src/or/or_sha1.i. Fixes bug 3953;
27291 bugfix on 0.2.0.1-alpha.
27293 o Code simplifications, cleanups, and refactorings:
27294 - Remove the pure attribute from all functions that used it
27295 previously. In many cases we assigned it incorrectly, because the
27296 functions might assert or call impure functions, and we don't have
27297 evidence that keeping the pure attribute is worthwhile. Implements
27298 changes suggested in ticket 4421.
27299 - Remove some dead code spotted by coverity. Fixes cid 432.
27300 Bugfix on 0.2.3.1-alpha, closes bug 4637.
27303 Changes in version 0.2.3.8-alpha - 2011-11-22
27304 Tor 0.2.3.8-alpha fixes some crash and assert bugs, including a
27305 socketpair-related bug that has been bothering Windows users. It adds
27306 support to serve microdescriptors to controllers, so Vidalia's network
27307 map can resume listing relays (once Vidalia implements its side),
27308 and adds better support for hardware AES acceleration. Finally, it
27309 starts the process of adjusting the bandwidth cutoff for getting the
27310 "Fast" flag from 20KB to (currently) 32KB -- preliminary results show
27311 that tiny relays harm performance more than they help network capacity.
27314 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
27315 that it doesn't attempt to allocate a socketpair. This could cause
27316 some problems on Windows systems with overzealous firewalls. Fix for
27317 bug 4457; workaround for Libevent versions 2.0.1-alpha through
27319 - Correctly sanity-check that we don't underflow on a memory
27320 allocation (and then assert) for hidden service introduction
27321 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
27322 bugfix on 0.2.1.5-alpha.
27323 - Remove the artificially low cutoff of 20KB to guarantee the Fast
27324 flag. In the past few years the average relay speed has picked
27325 up, and while the "top 7/8 of the network get the Fast flag" and
27326 "all relays with 20KB or more of capacity get the Fast flag" rules
27327 used to have the same result, now the top 7/8 of the network has
27328 a capacity more like 32KB. Bugfix on 0.2.1.14-rc. Fixes bug 4489.
27329 - Fix a rare assertion failure when checking whether a v0 hidden
27330 service descriptor has any usable introduction points left, and
27331 we don't have enough information to build a circuit to the first
27332 intro point named in the descriptor. The HS client code in
27333 0.2.3.x no longer uses v0 HS descriptors, but this assertion can
27334 trigger on (and crash) v0 HS authorities. Fixes bug 4411.
27335 Bugfix on 0.2.3.1-alpha; diagnosed by frosty_un.
27336 - Make bridge authorities not crash when they are asked for their own
27337 descriptor. Bugfix on 0.2.3.7-alpha, reported by Lucky Green.
27338 - When running as a client, do not print a misleading (and plain
27339 wrong) log message that we're collecting "directory request"
27340 statistics: clients don't collect statistics. Also don't create a
27341 useless (because empty) stats file in the stats/ directory. Fixes
27342 bug 4353; bugfix on 0.2.2.34 and 0.2.3.7-alpha.
27345 - Allow Tor controllers like Vidalia to obtain the microdescriptor
27346 for a relay by identity digest or nickname. Previously,
27347 microdescriptors were only available by their own digests, so a
27348 controller would have to ask for and parse the whole microdescriptor
27349 consensus in order to look up a single relay's microdesc. Fixes
27350 bug 3832; bugfix on 0.2.3.1-alpha.
27351 - Use OpenSSL's EVP interface for AES encryption, so that all AES
27352 operations can use hardware acceleration (if present). Resolves
27355 o Minor bugfixes (on 0.2.2.x and earlier):
27356 - Detect failure to initialize Libevent. This fix provides better
27357 detection for future instances of bug 4457.
27358 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
27359 function. This was eating up hideously large amounts of time on some
27360 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
27361 - Don't warn about unused log_mutex in log.c when building with
27362 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
27363 0.1.0.6-rc which introduced --disable-threads.
27364 - Allow manual 'authenticate' commands to the controller interface
27365 from netcat (nc) as well as telnet. We were rejecting them because
27366 they didn't come with the expected whitespace at the end of the
27367 command. Bugfix on 0.1.1.1-alpha; fixes bug 2893.
27368 - Fix some (not actually triggerable) buffer size checks in usage of
27369 tor_inet_ntop. Fixes bug 4434; bugfix on Tor 0.2.0.1-alpha. Patch
27371 - Fix parsing of some corner-cases with tor_inet_pton(). Fixes
27372 bug 4515; bugfix on 0.2.0.1-alpha; fix by Anders Sundman.
27373 - When configuring, starting, or stopping an NT service, stop
27374 immediately after the service configuration attempt has succeeded
27375 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
27376 - When sending a NETINFO cell, include the original address
27377 received for the other side, not its canonical address. Found
27378 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
27379 - Rename the bench_{aes,dmap} functions to test_*, so that tinytest
27380 can pick them up when the tests aren't disabled. Bugfix on
27381 0.2.2.4-alpha which introduced tinytest.
27382 - Fix a memory leak when we check whether a hidden service
27383 descriptor has any usable introduction points left. Fixes bug
27384 4424. Bugfix on 0.2.2.25-alpha.
27385 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
27386 occurred when a client tried to fetch a descriptor for a bridge
27387 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
27389 o Minor bugfixes (on 0.2.3.x):
27390 - Make util unit tests build correctly with MSVC. Bugfix on
27391 0.2.3.3-alpha. Patch by Gisle Vanem.
27392 - Successfully detect AUTH_CHALLENGE cells with no recognized
27393 authentication type listed. Fixes bug 4367; bugfix on 0.2.3.6-alpha.
27394 Found by frosty_un.
27395 - If a relay receives an AUTH_CHALLENGE cell it can't answer,
27396 it should still send a NETINFO cell to allow the connection to
27397 become open. Fixes bug 4368; fix on 0.2.3.6-alpha; bug found by
27399 - Log less loudly when we get an invalid authentication certificate
27400 from a source other than a directory authority: it's not unusual
27401 to see invalid certs because of clock skew. Fixes bug 4370; bugfix
27403 - Tolerate servers with more clock skew in their authentication
27404 certificates than previously. Fixes bug 4371; bugfix on
27406 - Fix a couple of compile warnings on Windows. Fixes bug 4469; bugfix
27407 on 0.2.3.4-alpha and 0.2.3.6-alpha.
27410 - Add two new config options for directory authorities:
27411 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
27412 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
27413 that is always sufficient to satisfy the bandwidth requirement for
27414 the Guard flag. Now it will be easier for researchers to simulate
27415 Tor networks with different values. Resolves ticket 4484.
27416 - When Tor ignores a hidden service specified in its configuration,
27417 include the hidden service's directory in the warning message.
27418 Previously, we would only tell the user that some hidden service
27419 was ignored. Bugfix on 0.0.6; fixes bug 4426.
27420 - When we fail to initialize Libevent, retry with IOCP disabled so we
27421 don't need to turn on multi-threading support in Libevent, which in
27422 turn requires a working socketpair(). This is a workaround for bug
27423 4457, which affects Libevent versions from 2.0.1-alpha through
27425 - Detect when we try to build on a platform that doesn't define
27426 AF_UNSPEC to 0. We don't work there, so refuse to compile.
27427 - Update to the November 1 2011 Maxmind GeoLite Country database.
27429 o Packaging changes:
27430 - Make it easier to automate expert package builds on Windows,
27431 by removing an absolute path from makensis.exe command.
27433 o Code simplifications and refactoring:
27434 - Remove some redundant #include directives throughout the code.
27435 Patch from Andrea Gelmini.
27436 - Unconditionally use OpenSSL's AES implementation instead of our
27437 old built-in one. OpenSSL's AES has been better for a while, and
27438 relatively few servers should still be on any version of OpenSSL
27439 that doesn't have good optimized assembly AES.
27440 - Use the name "CERTS" consistently to refer to the new cell type;
27441 we were calling it CERT in some places and CERTS in others.
27444 - Numerous new unit tests for functions in util.c and address.c by
27446 - The long-disabled benchmark tests are now split into their own
27447 ./src/test/bench binary.
27448 - The benchmark tests can now use more accurate timers than
27449 gettimeofday() when such timers are available.
27452 Changes in version 0.2.3.7-alpha - 2011-10-30
27453 Tor 0.2.3.7-alpha fixes a crash bug in 0.2.3.6-alpha introduced by
27454 the new v3 handshake. It also resolves yet another bridge address
27458 - If we mark an OR connection for close based on a cell we process,
27459 don't process any further cells on it. We already avoid further
27460 reads on marked-for-close connections, but now we also discard the
27461 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
27462 which was the first version where we might mark a connection for
27463 close based on processing a cell on it.
27464 - Fix a double-free bug that would occur when we received an invalid
27465 certificate in a CERT cell in the new v3 handshake. Fixes bug 4343;
27466 bugfix on 0.2.3.6-alpha.
27467 - Bridges no longer include their address in NETINFO cells on outgoing
27468 OR connections, to allow them to blend in better with clients.
27469 Removes another avenue for enumerating bridges. Reported by
27470 "troll_un". Fixes bug 4348; bugfix on 0.2.0.10-alpha, when NETINFO
27471 cells were introduced.
27474 - Fixed a typo in a hibernation-related log message. Fixes bug 4331;
27475 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
27478 Changes in version 0.2.3.6-alpha - 2011-10-26
27479 Tor 0.2.3.6-alpha includes the fix from 0.2.2.34 for a critical
27480 anonymity vulnerability where an attacker can deanonymize Tor
27481 users. Everybody should upgrade.
27483 This release also features support for a new v3 connection handshake
27484 protocol, and fixes to make hidden service connections more robust.
27487 - Implement a new handshake protocol (v3) for authenticating Tors to
27488 each other over TLS. It should be more resistant to fingerprinting
27489 than previous protocols, and should require less TLS hacking for
27490 future Tor implementations. Implements proposal 176.
27491 - Allow variable-length padding cells to disguise the length of
27492 Tor's TLS records. Implements part of proposal 184.
27494 o Privacy/anonymity fixes (clients):
27495 - Clients and bridges no longer send TLS certificate chains on
27496 outgoing OR connections. Previously, each client or bridge would
27497 use the same cert chain for all outgoing OR connections until
27498 its IP address changes, which allowed any relay that the client
27499 or bridge contacted to determine which entry guards it is using.
27500 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
27501 - If a relay receives a CREATE_FAST cell on a TLS connection, it
27502 no longer considers that connection as suitable for satisfying a
27503 circuit EXTEND request. Now relays can protect clients from the
27504 CVE-2011-2768 issue even if the clients haven't upgraded yet.
27505 - Directory authorities no longer assign the Guard flag to relays
27506 that haven't upgraded to the above "refuse EXTEND requests
27507 to client connections" fix. Now directory authorities can
27508 protect clients from the CVE-2011-2768 issue even if neither
27509 the clients nor the relays have upgraded yet. There's a new
27510 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
27511 to let us transition smoothly, else tomorrow there would be no
27514 o Major bugfixes (hidden services):
27515 - Improve hidden service robustness: when an attempt to connect to
27516 a hidden service ends, be willing to refetch its hidden service
27517 descriptors from each of the HSDir relays responsible for them
27518 immediately. Previously, we would not consider refetching the
27519 service's descriptors from each HSDir for 15 minutes after the last
27520 fetch, which was inconvenient if the hidden service was not running
27521 during the first attempt. Bugfix on 0.2.0.18-alpha; fixes bug 3335.
27522 - When one of a hidden service's introduction points appears to be
27523 unreachable, stop trying it. Previously, we would keep trying
27524 to build circuits to the introduction point until we lost the
27525 descriptor, usually because the user gave up and restarted Tor.
27526 Partly fixes bug 3825.
27527 - Don't launch a useless circuit after failing to use one of a
27528 hidden service's introduction points. Previously, we would
27529 launch a new introduction circuit, but not set the hidden service
27530 which that circuit was intended to connect to, so it would never
27531 actually be used. A different piece of code would then create a
27532 new introduction circuit correctly. Bug reported by katmagic and
27533 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
27535 o Major bugfixes (other):
27536 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
27537 that they initiated. Relays could distinguish incoming bridge
27538 connections from client connections, creating another avenue for
27539 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
27540 Found by "frosty_un".
27541 - Don't update the AccountingSoftLimitHitAt state file entry whenever
27542 tor gets started. This prevents a wrong average bandwidth
27543 estimate, which would cause relays to always start a new accounting
27544 interval at the earliest possible moment. Fixes bug 2003; bugfix
27545 on 0.2.2.7-alpha. Reported by BryonEldridge, who also helped
27546 immensely in tracking this bug down.
27547 - Fix a crash bug when changing node restrictions while a DNS lookup
27548 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
27551 o Minor bugfixes (on 0.2.2.x and earlier):
27552 - When a hidden service turns an extra service-side introduction
27553 circuit into a general-purpose circuit, free the rend_data and
27554 intro_key fields first, so we won't leak memory if the circuit
27555 is cannibalized for use as another service-side introduction
27556 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
27557 - Rephrase the log message emitted if the TestSocks check is
27558 successful. Patch from Fabian Keil; fixes bug 4094.
27559 - Bridges now skip DNS self-tests, to act a little more stealthily.
27560 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
27561 bridges. Patch by "warms0x".
27562 - Remove a confusing dollar sign from the example fingerprint in the
27563 man page, and also make the example fingerprint a valid one. Fixes
27564 bug 4309; bugfix on 0.2.1.3-alpha.
27565 - Fix internal bug-checking logic that was supposed to catch
27566 failures in digest generation so that it will fail more robustly
27567 if we ask for a nonexistent algorithm. Found by Coverity Scan.
27568 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
27569 - Report any failure in init_keys() calls launched because our
27570 IP address has changed. Spotted by Coverity Scan. Bugfix on
27571 0.1.1.4-alpha; fixes CID 484.
27573 o Minor bugfixes (on 0.2.3.x):
27574 - Fix a bug in configure.in that kept it from building a configure
27575 script with autoconf versions earlier than 2.61. Fixes bug 2430;
27576 bugfix on 0.2.3.1-alpha.
27577 - Don't warn users that they are exposing a client port to the
27578 Internet if they have specified an RFC1918 address. Previously,
27579 we would warn if the user had specified any non-loopback
27580 address. Bugfix on 0.2.3.3-alpha. Fixes bug 4018; reported by Tas.
27581 - Fix memory leaks in the failing cases of the new SocksPort and
27582 ControlPort code. Found by Coverity Scan. Bugfix on 0.2.3.3-alpha;
27583 fixes coverity CIDs 485, 486, and 487.
27586 - When a hidden service's introduction point times out, consider
27587 trying it again during the next attempt to connect to the
27588 HS. Previously, we would not try it again unless a newly fetched
27589 descriptor contained it. Required by fixes for bugs 1297 and 3825.
27590 - The next version of Windows will be called Windows 8, and it has
27591 a major version of 6, minor version of 2. Correctly identify that
27592 version instead of calling it "Very recent version". Resolves
27593 ticket 4153; reported by funkstar.
27594 - The Bridge Authority now writes statistics on how many bridge
27595 descriptors it gave out in total, and how many unique descriptors
27596 it gave out. It also lists how often the most and least commonly
27597 fetched descriptors were given out, as well as the median and
27598 25th/75th percentile. Implements tickets 4200 and 4294.
27599 - Update to the October 4 2011 Maxmind GeoLite Country database.
27601 o Code simplifications and refactoring:
27602 - Remove some old code to remember statistics about which descriptors
27603 we've served as a directory mirror. The feature wasn't used and
27604 is outdated now that microdescriptors are around.
27605 - Rename Tor functions that turn strings into addresses, so that
27606 "parse" indicates that no hostname resolution occurs, and
27607 "lookup" indicates that hostname resolution may occur. This
27608 should help prevent mistakes in the future. Fixes bug 3512.
27611 Changes in version 0.2.2.34 - 2011-10-26
27612 Tor 0.2.2.34 fixes a critical anonymity vulnerability where an attacker
27613 can deanonymize Tor users. Everybody should upgrade.
27615 The attack relies on four components: 1) Clients reuse their TLS cert
27616 when talking to different relays, so relays can recognize a user by
27617 the identity key in her cert. 2) An attacker who knows the client's
27618 identity key can probe each guard relay to see if that identity key
27619 is connected to that guard relay right now. 3) A variety of active
27620 attacks in the literature (starting from "Low-Cost Traffic Analysis
27621 of Tor" by Murdoch and Danezis in 2005) allow a malicious website to
27622 discover the guard relays that a Tor user visiting the website is using.
27623 4) Clients typically pick three guards at random, so the set of guards
27624 for a given user could well be a unique fingerprint for her. This
27625 release fixes components #1 and #2, which is enough to block the attack;
27626 the other two remain as open research problems. Special thanks to
27627 "frosty_un" for reporting the issue to us!
27629 Clients should upgrade so they are no longer recognizable by the TLS
27630 certs they present. Relays should upgrade so they no longer allow a
27631 remote attacker to probe them to test whether unpatched clients are
27632 currently connected to them.
27634 This release also fixes several vulnerabilities that allow an attacker
27635 to enumerate bridge relays. Some bridge enumeration attacks still
27636 remain; see for example proposal 188.
27638 o Privacy/anonymity fixes (clients):
27639 - Clients and bridges no longer send TLS certificate chains on
27640 outgoing OR connections. Previously, each client or bridge would
27641 use the same cert chain for all outgoing OR connections until
27642 its IP address changes, which allowed any relay that the client
27643 or bridge contacted to determine which entry guards it is using.
27644 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
27645 - If a relay receives a CREATE_FAST cell on a TLS connection, it
27646 no longer considers that connection as suitable for satisfying a
27647 circuit EXTEND request. Now relays can protect clients from the
27648 CVE-2011-2768 issue even if the clients haven't upgraded yet.
27649 - Directory authorities no longer assign the Guard flag to relays
27650 that haven't upgraded to the above "refuse EXTEND requests
27651 to client connections" fix. Now directory authorities can
27652 protect clients from the CVE-2011-2768 issue even if neither
27653 the clients nor the relays have upgraded yet. There's a new
27654 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
27655 to let us transition smoothly, else tomorrow there would be no
27658 o Privacy/anonymity fixes (bridge enumeration):
27659 - Bridge relays now do their directory fetches inside Tor TLS
27660 connections, like all the other clients do, rather than connecting
27661 directly to the DirPort like public relays do. Removes another
27662 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
27663 - Bridges relays now build circuits for themselves in a more similar
27664 way to how clients build them. Removes another avenue for
27665 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
27666 when bridges were introduced.
27667 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
27668 that they initiated. Relays could distinguish incoming bridge
27669 connections from client connections, creating another avenue for
27670 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
27671 Found by "frosty_un".
27674 - Fix a crash bug when changing node restrictions while a DNS lookup
27675 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
27677 - Don't launch a useless circuit after failing to use one of a
27678 hidden service's introduction points. Previously, we would
27679 launch a new introduction circuit, but not set the hidden service
27680 which that circuit was intended to connect to, so it would never
27681 actually be used. A different piece of code would then create a
27682 new introduction circuit correctly. Bug reported by katmagic and
27683 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
27686 - Change an integer overflow check in the OpenBSD_Malloc code so
27687 that GCC is less likely to eliminate it as impossible. Patch
27688 from Mansour Moufid. Fixes bug 4059.
27689 - When a hidden service turns an extra service-side introduction
27690 circuit into a general-purpose circuit, free the rend_data and
27691 intro_key fields first, so we won't leak memory if the circuit
27692 is cannibalized for use as another service-side introduction
27693 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
27694 - Bridges now skip DNS self-tests, to act a little more stealthily.
27695 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
27696 bridges. Patch by "warms0x".
27697 - Fix internal bug-checking logic that was supposed to catch
27698 failures in digest generation so that it will fail more robustly
27699 if we ask for a nonexistent algorithm. Found by Coverity Scan.
27700 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
27701 - Report any failure in init_keys() calls launched because our
27702 IP address has changed. Spotted by Coverity Scan. Bugfix on
27703 0.1.1.4-alpha; fixes CID 484.
27705 o Minor bugfixes (log messages and documentation):
27706 - Remove a confusing dollar sign from the example fingerprint in the
27707 man page, and also make the example fingerprint a valid one. Fixes
27708 bug 4309; bugfix on 0.2.1.3-alpha.
27709 - The next version of Windows will be called Windows 8, and it has
27710 a major version of 6, minor version of 2. Correctly identify that
27711 version instead of calling it "Very recent version". Resolves
27712 ticket 4153; reported by funkstar.
27713 - Downgrade log messages about circuit timeout calibration from
27714 "notice" to "info": they don't require or suggest any human
27715 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
27716 bugfix on 0.2.2.14-alpha.
27719 - Turn on directory request statistics by default and include them in
27720 extra-info descriptors. Don't break if we have no GeoIP database.
27721 Backported from 0.2.3.1-alpha; implements ticket 3951.
27722 - Update to the October 4 2011 Maxmind GeoLite Country database.
27725 Changes in version 0.2.1.31 - 2011-10-26
27726 Tor 0.2.1.31 backports important security and privacy fixes for
27727 oldstable. This release is intended only for package maintainers and
27728 others who cannot use the 0.2.2 stable series. All others should be
27729 using Tor 0.2.2.x or newer.
27731 o Security fixes (also included in 0.2.2.x):
27732 - Replace all potentially sensitive memory comparison operations
27733 with versions whose runtime does not depend on the data being
27734 compared. This will help resist a class of attacks where an
27735 adversary can use variations in timing information to learn
27736 sensitive data. Fix for one case of bug 3122. (Safe memcmp
27737 implementation by Robert Ransom based partially on code by DJB.)
27738 - Fix an assert in parsing router descriptors containing IPv6
27739 addresses. This one took down the directory authorities when
27740 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
27742 o Privacy/anonymity fixes (also included in 0.2.2.x):
27743 - Clients and bridges no longer send TLS certificate chains on
27744 outgoing OR connections. Previously, each client or bridge would
27745 use the same cert chain for all outgoing OR connections until
27746 its IP address changes, which allowed any relay that the client
27747 or bridge contacted to determine which entry guards it is using.
27748 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
27749 - If a relay receives a CREATE_FAST cell on a TLS connection, it
27750 no longer considers that connection as suitable for satisfying a
27751 circuit EXTEND request. Now relays can protect clients from the
27752 CVE-2011-2768 issue even if the clients haven't upgraded yet.
27753 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
27754 that they initiated. Relays could distinguish incoming bridge
27755 connections from client connections, creating another avenue for
27756 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
27757 Found by "frosty_un".
27758 - When receiving a hidden service descriptor, check that it is for
27759 the hidden service we wanted. Previously, Tor would store any
27760 hidden service descriptors that a directory gave it, whether it
27761 wanted them or not. This wouldn't have let an attacker impersonate
27762 a hidden service, but it did let directories pre-seed a client
27763 with descriptors that it didn't want. Bugfix on 0.0.6.
27764 - Avoid linkability based on cached hidden service descriptors: forget
27765 all hidden service descriptors cached as a client when processing a
27766 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
27767 - Make the bridge directory authority refuse to answer directory
27768 requests for "all" descriptors. It used to include bridge
27769 descriptors in its answer, which was a major information leak.
27770 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
27771 - Don't attach new streams to old rendezvous circuits after SIGNAL
27772 NEWNYM. Previously, we would keep using an existing rendezvous
27773 circuit if it remained open (i.e. if it were kept open by a
27774 long-lived stream, or if a new stream were attached to it before
27775 Tor could notice that it was old and no longer in use). Bugfix on
27776 0.1.1.15-rc; fixes bug 3375.
27778 o Minor bugfixes (also included in 0.2.2.x):
27779 - When we restart our relay, we might get a successful connection
27780 from the outside before we've started our reachability tests,
27781 triggering a warning: "ORPort found reachable, but I have no
27782 routerinfo yet. Failing to inform controller of success." This
27783 bug was harmless unless Tor is running under a controller
27784 like Vidalia, in which case the controller would never get a
27785 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
27787 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
27788 enabled. Fixes bug 1526.
27789 - Remove undocumented option "-F" from tor-resolve: it hasn't done
27790 anything since 0.2.1.16-rc.
27791 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
27792 None of the cases where we did this before were wrong, but by making
27793 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
27794 - Fix a rare crash bug that could occur when a client was configured
27795 with a large number of bridges. Fixes bug 2629; bugfix on
27796 0.2.1.2-alpha. Bugfix by trac user "shitlei".
27797 - Correct the warning displayed when a rendezvous descriptor exceeds
27798 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
27800 - Fix an uncommon assertion failure when running with DNSPort under
27801 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
27802 - When warning about missing zlib development packages during compile,
27803 give the correct package names. Bugfix on 0.2.0.1-alpha.
27804 - Require that introduction point keys and onion keys have public
27805 exponent 65537. Bugfix on 0.2.0.10-alpha.
27806 - Do not crash when our configuration file becomes unreadable, for
27807 example due to a permissions change, between when we start up
27808 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
27810 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
27812 - Always NUL-terminate the sun_path field of a sockaddr_un before
27813 passing it to the kernel. (Not a security issue: kernels are
27814 smart enough to reject bad sockaddr_uns.) Found by Coverity;
27815 CID #428. Bugfix on Tor 0.2.0.3-alpha.
27816 - Don't stack-allocate the list of supplementary GIDs when we're
27817 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
27818 could take up to 256K, which is way too much stack. Found by
27819 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
27821 o Minor bugfixes (only in 0.2.1.x):
27822 - Resume using micro-version numbers in 0.2.1.x: our Debian packages
27823 rely on them. Bugfix on 0.2.1.30.
27824 - Use git revisions instead of svn revisions when generating our
27825 micro-version numbers. Bugfix on 0.2.1.15-rc; fixes bug 2402.
27827 o Minor features (also included in 0.2.2.x):
27828 - Adjust the expiration time on our SSL session certificates to
27829 better match SSL certs seen in the wild. Resolves ticket 4014.
27830 - Allow nameservers with IPv6 address. Resolves bug 2574.
27831 - Update to the October 4 2011 Maxmind GeoLite Country database.
27834 Changes in version 0.2.3.5-alpha - 2011-09-28
27835 Tor 0.2.3.5-alpha fixes two bugs that make it possible to enumerate
27836 bridge relays; fixes an assertion error that many users started hitting
27837 today; and adds the ability to refill token buckets more often than
27838 once per second, allowing significant performance improvements.
27841 - Bridge relays now do their directory fetches inside Tor TLS
27842 connections, like all the other clients do, rather than connecting
27843 directly to the DirPort like public relays do. Removes another
27844 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
27845 - Bridges relays now build circuits for themselves in a more similar
27846 way to how clients build them. Removes another avenue for
27847 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
27848 when bridges were introduced.
27851 - Fix an "Assertion md->held_by_node == 1 failed" error that could
27852 occur when the same microdescriptor was referenced by two node_t
27853 objects at once. Fix for bug 4118; bugfix on Tor 0.2.3.1-alpha.
27855 o Major features (networking):
27856 - Add a new TokenBucketRefillInterval option to refill token buckets
27857 more frequently than once per second. This should improve network
27858 performance, alleviate queueing problems, and make traffic less
27859 bursty. Implements proposal 183; closes ticket 3630. Design by
27860 Florian Tschorsch and Björn Scheuermann; implementation by
27864 - Change an integer overflow check in the OpenBSD_Malloc code so
27865 that GCC is less likely to eliminate it as impossible. Patch
27866 from Mansour Moufid. Fixes bug 4059.
27868 o Minor bugfixes (usability):
27869 - Downgrade log messages about circuit timeout calibration from
27870 "notice" to "info": they don't require or suggest any human
27871 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
27872 bugfix on 0.2.2.14-alpha.
27874 o Minor features (diagnostics):
27875 - When the system call to create a listener socket fails, log the
27876 error message explaining why. This may help diagnose bug 4027.
27879 Changes in version 0.2.3.4-alpha - 2011-09-13
27880 Tor 0.2.3.4-alpha includes the fixes from 0.2.2.33, including a slight
27881 tweak to Tor's TLS handshake that makes relays and bridges that run
27882 this new version reachable from Iran again. It also fixes a few new
27883 bugs in 0.2.3.x, and teaches relays to recognize when they're not
27884 listed in the network consensus and republish.
27886 o Major bugfixes (also part of 0.2.2.33):
27887 - Avoid an assertion failure when reloading a configuration with
27888 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
27889 3923; bugfix on 0.2.2.25-alpha.
27891 o Minor features (security, also part of 0.2.2.33):
27892 - Check for replays of the public-key encrypted portion of an
27893 INTRODUCE1 cell, in addition to the current check for replays of
27894 the g^x value. This prevents a possible class of active attacks
27895 by an attacker who controls both an introduction point and a
27896 rendezvous point, and who uses the malleability of AES-CTR to
27897 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
27898 that these attacks are infeasible (requiring the attacker to send
27899 on the order of zettabytes of altered cells in a short interval),
27900 but we'd rather block them off in case there are any classes of
27901 this attack that we missed. Reported by Willem Pinckaers.
27903 o Minor features (also part of 0.2.2.33):
27904 - Adjust the expiration time on our SSL session certificates to
27905 better match SSL certs seen in the wild. Resolves ticket 4014.
27906 - Change the default required uptime for a relay to be accepted as
27907 a HSDir (hidden service directory) from 24 hours to 25 hours.
27908 Improves on 0.2.0.10-alpha; resolves ticket 2649.
27909 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
27910 authorities to abstain from voting on assignment of the HSDir
27911 consensus flag. Related to bug 2649.
27912 - Update to the September 6 2011 Maxmind GeoLite Country database.
27914 o Minor bugfixes (also part of 0.2.2.33):
27915 - Demote the 'replay detected' log message emitted when a hidden
27916 service receives the same Diffie-Hellman public key in two different
27917 INTRODUCE2 cells to info level. A normal Tor client can cause that
27918 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
27919 fixes part of bug 2442.
27920 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
27921 level. There is nothing that a hidden service's operator can do
27922 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
27924 - Clarify a log message specifying the characters permitted in
27925 HiddenServiceAuthorizeClient client names. Previously, the log
27926 message said that "[A-Za-z0-9+-_]" were permitted; that could have
27927 given the impression that every ASCII character between "+" and "_"
27928 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
27930 o Build fixes (also part of 0.2.2.33):
27931 - Clean up some code issues that prevented Tor from building on older
27932 BSDs. Fixes bug 3894; reported by "grarpamp".
27933 - Search for a platform-specific version of "ar" when cross-compiling.
27934 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
27937 - Fix a bug where the SocksPort option (for example) would get
27938 ignored and replaced by the default if a SocksListenAddress
27939 option was set. Bugfix on 0.2.3.3-alpha; fixes bug 3936. Fix by
27943 - Relays now try regenerating and uploading their descriptor more
27944 frequently if they are not listed in the consensus, or if the
27945 version of their descriptor listed in the consensus is too
27946 old. This fix should prevent situations where a server declines
27947 to re-publish itself because it has done so too recently, even
27948 though the authorities decided not to list its recent-enough
27949 descriptor. Fix for bug 3327.
27952 - Relays now include a reason for regenerating their descriptors
27953 in an HTTP header when uploading to the authorities. This will
27954 make it easier to debug descriptor-upload issues in the future.
27955 - When starting as root and then changing our UID via the User
27956 control option, and we have a ControlSocket configured, make sure
27957 that the ControlSocket is owned by the same account that Tor will
27958 run under. Implements ticket 3421; fix by Jérémy Bobbio.
27961 - Abort if tor_vasprintf fails in connection_printf_to_buf (a
27962 utility function used in the control-port code). This shouldn't
27963 ever happen unless Tor is completely out of memory, but if it did
27964 happen and Tor somehow recovered from it, Tor could have sent a log
27965 message to a control port in the middle of a reply to a controller
27966 command. Fixes part of bug 3428; bugfix on 0.1.2.3-alpha.
27967 - Make 'FetchUselessDescriptors' cause all descriptor types and
27968 all consensus types (including microdescriptors) to get fetched.
27969 Fixes bug 3851; bugfix on 0.2.3.1-alpha.
27971 o Code refactoring:
27972 - Make a new "entry connection" struct as an internal subtype of "edge
27973 connection", to simplify the code and make exit connections smaller.
27976 Changes in version 0.2.2.33 - 2011-09-13
27977 Tor 0.2.2.33 fixes several bugs, and includes a slight tweak to Tor's
27978 TLS handshake that makes relays and bridges that run this new version
27979 reachable from Iran again.
27982 - Avoid an assertion failure when reloading a configuration with
27983 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
27984 3923; bugfix on 0.2.2.25-alpha.
27986 o Minor features (security):
27987 - Check for replays of the public-key encrypted portion of an
27988 INTRODUCE1 cell, in addition to the current check for replays of
27989 the g^x value. This prevents a possible class of active attacks
27990 by an attacker who controls both an introduction point and a
27991 rendezvous point, and who uses the malleability of AES-CTR to
27992 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
27993 that these attacks are infeasible (requiring the attacker to send
27994 on the order of zettabytes of altered cells in a short interval),
27995 but we'd rather block them off in case there are any classes of
27996 this attack that we missed. Reported by Willem Pinckaers.
27999 - Adjust the expiration time on our SSL session certificates to
28000 better match SSL certs seen in the wild. Resolves ticket 4014.
28001 - Change the default required uptime for a relay to be accepted as
28002 a HSDir (hidden service directory) from 24 hours to 25 hours.
28003 Improves on 0.2.0.10-alpha; resolves ticket 2649.
28004 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
28005 authorities to abstain from voting on assignment of the HSDir
28006 consensus flag. Related to bug 2649.
28007 - Update to the September 6 2011 Maxmind GeoLite Country database.
28009 o Minor bugfixes (documentation and log messages):
28010 - Correct the man page to explain that HashedControlPassword and
28011 CookieAuthentication can both be set, in which case either method
28012 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
28013 when we decided to allow these config options to both be set. Issue
28014 raised by bug 3898.
28015 - Demote the 'replay detected' log message emitted when a hidden
28016 service receives the same Diffie-Hellman public key in two different
28017 INTRODUCE2 cells to info level. A normal Tor client can cause that
28018 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
28019 fixes part of bug 2442.
28020 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
28021 level. There is nothing that a hidden service's operator can do
28022 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
28024 - Clarify a log message specifying the characters permitted in
28025 HiddenServiceAuthorizeClient client names. Previously, the log
28026 message said that "[A-Za-z0-9+-_]" were permitted; that could have
28027 given the impression that every ASCII character between "+" and "_"
28028 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
28031 - Provide a substitute implementation of lround() for MSVC, which
28032 apparently lacks it. Patch from Gisle Vanem.
28033 - Clean up some code issues that prevented Tor from building on older
28034 BSDs. Fixes bug 3894; reported by "grarpamp".
28035 - Search for a platform-specific version of "ar" when cross-compiling.
28036 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
28039 Changes in version 0.2.3.3-alpha - 2011-09-01
28040 Tor 0.2.3.3-alpha adds a new "stream isolation" feature to improve Tor's
28041 security, and provides client-side support for the microdescriptor
28042 and optimistic data features introduced earlier in the 0.2.3.x
28043 series. It also includes numerous critical bugfixes in the (optional)
28044 bufferevent-based networking backend.
28046 o Major features (stream isolation):
28047 - You can now configure Tor so that streams from different
28048 applications are isolated on different circuits, to prevent an
28049 attacker who sees your streams as they leave an exit node from
28050 linking your sessions to one another. To do this, choose some way
28051 to distinguish the applications: have them connect to different
28052 SocksPorts, or have one of them use SOCKS4 while the other uses
28053 SOCKS5, or have them pass different authentication strings to the
28054 SOCKS proxy. Then, use the new SocksPort syntax to configure the
28055 degree of isolation you need. This implements Proposal 171.
28056 - There's a new syntax for specifying multiple client ports (such as
28057 SOCKSPort, TransPort, DNSPort, NATDPort): you can now just declare
28058 multiple *Port entries with full addr:port syntax on each.
28059 The old *ListenAddress format is still supported, but you can't
28060 mix it with the new *Port syntax.
28062 o Major features (other):
28063 - Enable microdescriptor fetching by default for clients. This allows
28064 clients to download a much smaller amount of directory information.
28065 To disable it (and go back to the old-style consensus and
28066 descriptors), set "UseMicrodescriptors 0" in your torrc file.
28067 - Tor's firewall-helper feature, introduced in 0.2.3.1-alpha (see the
28068 "PortForwarding" config option), now supports Windows.
28069 - When using an exit relay running 0.2.3.x, clients can now
28070 "optimistically" send data before the exit relay reports that
28071 the stream has opened. This saves a round trip when starting
28072 connections where the client speaks first (such as web browsing).
28073 This behavior is controlled by a consensus parameter (currently
28074 disabled). To turn it on or off manually, use the "OptimisticData"
28075 torrc option. Implements proposal 181; code by Ian Goldberg.
28077 o Major bugfixes (bufferevents, fixes on 0.2.3.1-alpha):
28078 - When using IOCP on Windows, we need to enable Libevent windows
28080 - The IOCP backend now works even when the user has not specified
28081 the (internal, debugging-only) _UseFilteringSSLBufferevents option.
28082 Fixes part of bug 3752.
28083 - Correctly record the bytes we've read and written when using
28084 bufferevents, so that we can include them in our bandwidth history
28085 and advertised bandwidth. Fixes bug 3803.
28086 - Apply rate-limiting only at the bottom of a chain of filtering
28087 bufferevents. This prevents us from filling up internal read
28088 buffers and violating rate-limits when filtering bufferevents
28089 are enabled. Fixes part of bug 3804.
28090 - Add high-watermarks to the output buffers for filtered
28091 bufferevents. This prevents us from filling up internal write
28092 buffers and wasting CPU cycles when filtering bufferevents are
28093 enabled. Fixes part of bug 3804.
28094 - Correctly notice when data has been written from a bufferevent
28095 without flushing it completely. Fixes bug 3805.
28096 - Fix a bug where server-side tunneled bufferevent-based directory
28097 streams would get closed prematurely. Fixes bug 3814.
28098 - Fix a use-after-free error with per-connection rate-limiting
28099 buckets. Fixes bug 3888.
28101 o Major bugfixes (also part of 0.2.2.31-rc):
28102 - If we're configured to write our ControlPorts to disk, only write
28103 them after switching UID and creating the data directory. This way,
28104 we don't fail when starting up with a nonexistent DataDirectory
28105 and a ControlPortWriteToFile setting based on that directory. Fixes
28106 bug 3747; bugfix on Tor 0.2.2.26-beta.
28109 - Added a new CONF_CHANGED event so that controllers can be notified
28110 of any configuration changes made by other controllers, or by the
28111 user. Implements ticket 1692.
28112 - Use evbuffer_copyout() in inspect_evbuffer(). This fixes a memory
28113 leak when using bufferevents, and lets Libevent worry about how to
28114 best copy data out of a buffer.
28115 - Replace files in stats/ rather than appending to them. Now that we
28116 include statistics in extra-info descriptors, it makes no sense to
28117 keep old statistics forever. Implements ticket 2930.
28119 o Minor features (build compatibility):
28120 - Limited, experimental support for building with nmake and MSVC.
28121 - Provide a substitute implementation of lround() for MSVC, which
28122 apparently lacks it. Patch from Gisle Vanem.
28124 o Minor features (also part of 0.2.2.31-rc):
28125 - Update to the August 2 2011 Maxmind GeoLite Country database.
28127 o Minor bugfixes (on 0.2.3.x-alpha):
28128 - Fix a spurious warning when parsing SOCKS requests with
28129 bufferevents enabled. Fixes bug 3615; bugfix on 0.2.3.2-alpha.
28130 - Get rid of a harmless warning that could happen on relays running
28131 with bufferevents. The warning was caused by someone doing an http
28132 request to a relay's orport. Also don't warn for a few related
28133 non-errors. Fixes bug 3700; bugfix on 0.2.3.1-alpha.
28135 o Minor bugfixes (on 2.2.x and earlier):
28136 - Correct the man page to explain that HashedControlPassword and
28137 CookieAuthentication can both be set, in which case either method
28138 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
28139 when we decided to allow these config options to both be set. Issue
28140 raised by bug 3898.
28141 - The "--quiet" and "--hush" options now apply not only to Tor's
28142 behavior before logs are configured, but also to Tor's behavior in
28143 the absence of configured logs. Fixes bug 3550; bugfix on
28146 o Minor bugfixes (also part of 0.2.2.31-rc):
28147 - Write several files in text mode, on OSes that distinguish text
28148 mode from binary mode (namely, Windows). These files are:
28149 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
28150 that collect those statistics; 'client_keys' and 'hostname' for
28151 hidden services that use authentication; and (in the tor-gencert
28152 utility) newly generated identity and signing keys. Previously,
28153 we wouldn't specify text mode or binary mode, leading to an
28154 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
28155 the DirRecordUsageByCountry option which would have triggered
28156 the assertion failure was added), although this assertion failure
28157 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
28158 - Selectively disable deprecation warnings on OS X because Lion
28159 started deprecating the shipped copy of openssl. Fixes bug 3643.
28160 - Remove an extra pair of quotation marks around the error
28161 message in control-port STATUS_GENERAL BUG events. Bugfix on
28162 0.1.2.6-alpha; fixes bug 3732.
28163 - When unable to format an address as a string, report its value
28164 as "???" rather than reusing the last formatted address. Bugfix
28167 o Code simplifications and refactoring:
28168 - Rewrite the listener-selection logic so that parsing which ports
28169 we want to listen on is now separate from binding to the ports
28173 - Building Tor with bufferevent support now requires Libevent
28174 2.0.13-stable or later. Previous versions of Libevent had bugs in
28175 SSL-related bufferevents and related issues that would make Tor
28176 work badly with bufferevents. Requiring 2.0.13-stable also allows
28177 Tor with bufferevents to take advantage of Libevent APIs
28178 introduced after 2.0.8-rc.
28181 Changes in version 0.2.2.32 - 2011-08-27
28182 The Tor 0.2.2 release series is dedicated to the memory of Andreas
28183 Pfitzmann (1958-2010), a pioneer in anonymity and privacy research,
28184 a founder of the PETS community, a leader in our field, a mentor,
28185 and a friend. He left us with these words: "I had the possibility
28186 to contribute to this world that is not as it should be. I hope I
28187 could help in some areas to make the world a better place, and that
28188 I could also encourage other people to be engaged in improving the
28189 world. Please, stay engaged. This world needs you, your love, your
28190 initiative -- now I cannot be part of that anymore."
28192 Tor 0.2.2.32, the first stable release in the 0.2.2 branch, is finally
28193 ready. More than two years in the making, this release features improved
28194 client performance and hidden service reliability, better compatibility
28195 for Android, correct behavior for bridges that listen on more than
28196 one address, more extensible and flexible directory object handling,
28197 better reporting of network statistics, improved code security, and
28198 many many other features and bugfixes.
28201 Changes in version 0.2.2.31-rc - 2011-08-17
28202 Tor 0.2.2.31-rc is the second and hopefully final release candidate
28203 for the Tor 0.2.2.x series.
28206 - Remove an extra pair of quotation marks around the error
28207 message in control-port STATUS_GENERAL BUG events. Bugfix on
28208 0.1.2.6-alpha; fixes bug 3732.
28209 - If we're configured to write our ControlPorts to disk, only write
28210 them after switching UID and creating the data directory. This way,
28211 we don't fail when starting up with a nonexistent DataDirectory
28212 and a ControlPortWriteToFile setting based on that directory. Fixes
28213 bug 3747; bugfix on Tor 0.2.2.26-beta.
28216 - Update to the August 2 2011 Maxmind GeoLite Country database.
28219 - Allow GETINFO fingerprint to return a fingerprint even when
28220 we have not yet built a router descriptor. Fixes bug 3577;
28221 bugfix on 0.2.0.1-alpha.
28222 - Write several files in text mode, on OSes that distinguish text
28223 mode from binary mode (namely, Windows). These files are:
28224 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
28225 that collect those statistics; 'client_keys' and 'hostname' for
28226 hidden services that use authentication; and (in the tor-gencert
28227 utility) newly generated identity and signing keys. Previously,
28228 we wouldn't specify text mode or binary mode, leading to an
28229 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
28230 the DirRecordUsageByCountry option which would have triggered
28231 the assertion failure was added), although this assertion failure
28232 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
28233 - Selectively disable deprecation warnings on OS X because Lion
28234 started deprecating the shipped copy of openssl. Fixes bug 3643.
28235 - When unable to format an address as a string, report its value
28236 as "???" rather than reusing the last formatted address. Bugfix
28240 Changes in version 0.2.3.2-alpha - 2011-07-18
28241 Tor 0.2.3.2-alpha introduces two new experimental features:
28242 microdescriptors and pluggable transports. It also continues cleaning
28243 up a variety of recently introduced features.
28246 - Clients can now use microdescriptors instead of regular descriptors
28247 to build circuits. Microdescriptors are authority-generated
28248 summaries of regular descriptors' contents, designed to change
28249 very rarely (see proposal 158 for details). This feature is
28250 designed to save bandwidth, especially for clients on slow internet
28251 connections. It's off by default for now, since nearly no caches
28252 support it, but it will be on-by-default for clients in a future
28253 version. You can use the UseMicrodescriptors option to turn it on.
28254 - Tor clients using bridges can now be configured to use a separate
28255 'transport' proxy for each bridge. This approach helps to resist
28256 censorship by allowing bridges to use protocol obfuscation
28257 plugins. It implements part of proposal 180. Implements ticket 2841.
28258 - While we're trying to bootstrap, record how many TLS connections
28259 fail in each state, and report which states saw the most failures
28260 in response to any bootstrap failures. This feature may speed up
28261 diagnosis of censorship events. Implements ticket 3116.
28263 o Major bugfixes (on 0.2.3.1-alpha):
28264 - When configuring a large set of nodes in EntryNodes (as with
28265 'EntryNodes {cc}' or 'EntryNodes 1.1.1.1/16'), choose only a
28266 random subset to be guards, and choose them in random
28267 order. Fixes bug 2798.
28268 - Tor could crash when remembering a consensus in a non-used consensus
28269 flavor without having a current consensus set. Fixes bug 3361.
28270 - Comparing an unknown address to a microdescriptor's shortened exit
28271 policy would always give a "rejected" result. Fixes bug 3599.
28272 - Using microdescriptors as a client no longer prevents Tor from
28273 uploading and downloading hidden service descriptors. Fixes
28277 - Allow nameservers with IPv6 address. Resolves bug 2574.
28278 - Accept attempts to include a password authenticator in the
28279 handshake, as supported by SOCKS5. This handles SOCKS clients that
28280 don't know how to omit a password when authenticating. Resolves
28282 - When configuring a large set of nodes in EntryNodes, and there are
28283 enough of them listed as Guard so that we don't need to consider
28284 the non-guard entries, prefer the ones listed with the Guard flag.
28285 - Check for and recover from inconsistency in the microdescriptor
28286 cache. This will make it harder for us to accidentally free a
28287 microdescriptor without removing it from the appropriate data
28288 structures. Fixes issue 3135; issue noted by "wanoskarnet".
28289 - Log SSL state transitions at log level DEBUG, log domain
28290 HANDSHAKE. This can be useful for debugging censorship events.
28291 Implements ticket 3264.
28292 - Add port 6523 (Gobby) to LongLivedPorts. Patch by intrigeri;
28293 implements ticket 3439.
28295 o Minor bugfixes (on 0.2.3.1-alpha):
28296 - Do not free all general-purpose regular descriptors just
28297 because microdescriptor use is enabled. Fixes bug 3113.
28298 - Correctly link libevent_openssl when --enable-static-libevent
28299 is passed to configure. Fixes bug 3118.
28300 - Bridges should not complain during their heartbeat log messages that
28301 they are unlisted in the consensus: that's more or less the point
28302 of being a bridge. Fixes bug 3183.
28303 - Report a SIGNAL event to controllers when acting on a delayed
28304 SIGNAL NEWNYM command. Previously, we would report a SIGNAL
28305 event to the controller if we acted on a SIGNAL NEWNYM command
28306 immediately, and otherwise not report a SIGNAL event for the
28307 command at all. Fixes bug 3349.
28308 - Fix a crash when handling the SIGNAL controller command or
28309 reporting ERR-level status events with bufferevents enabled. Found
28310 by Robert Ransom. Fixes bug 3367.
28311 - Always ship the tor-fw-helper manpage in our release tarballs.
28312 Fixes bug 3389. Reported by Stephen Walker.
28313 - Fix a class of double-mark-for-close bugs when bufferevents
28314 are enabled. Fixes bug 3403.
28315 - Update tor-fw-helper to support libnatpmp-20110618. Fixes bug 3434.
28316 - Add SIGNAL to the list returned by the 'GETINFO events/names'
28317 control-port command. Fixes part of bug 3465.
28318 - Prevent using negative indices during unit test runs when read_all()
28319 fails. Spotted by coverity.
28320 - Fix a rare memory leak when checking the nodelist without it being
28321 present. Found by coverity.
28322 - Only try to download a microdescriptor-flavored consensus from
28323 a directory cache that provides them.
28325 o Minor bugfixes (on 0.2.2.x and earlier):
28326 - Assert that hidden-service-related operations are not performed
28327 using single-hop circuits. Previously, Tor would assert that
28328 client-side streams are not attached to single-hop circuits,
28329 but not that other sensitive operations on the client and service
28330 side are not performed using single-hop circuits. Fixes bug 3332;
28332 - Don't publish a new relay descriptor when we reload our onion key,
28333 unless the onion key has actually changed. Fixes bug 3263 and
28334 resolves another cause of bug 1810. Bugfix on 0.1.1.11-alpha.
28335 - Allow GETINFO fingerprint to return a fingerprint even when
28336 we have not yet built a router descriptor. Fixes bug 3577;
28337 bugfix on 0.2.0.1-alpha.
28338 - Make 'tor --digests' list hashes of all Tor source files. Bugfix
28339 on 0.2.2.4-alpha; fixes bug 3427.
28341 o Code simplification and refactoring:
28342 - Use tor_sscanf() in place of scanf() in more places through the
28343 code. This makes us a little more locale-independent, and
28344 should help shut up code-analysis tools that can't tell
28345 a safe sscanf string from a dangerous one.
28346 - Use tt_assert(), not tor_assert(), for checking for test failures.
28347 This makes the unit tests more able to go on in the event that
28349 - Split connection_about_to_close() into separate functions for each
28353 - On Windows, we now define the _WIN32_WINNT macros only if they
28354 are not already defined. This lets the person building Tor decide,
28355 if they want, to require a later version of Windows.
28358 Changes in version 0.2.2.30-rc - 2011-07-07
28359 Tor 0.2.2.30-rc is the first release candidate for the Tor 0.2.2.x
28360 series. It fixes a few smaller bugs, but generally appears stable.
28361 Please test it and let us know whether it is!
28364 - Send a SUCCEEDED stream event to the controller when a reverse
28365 resolve succeeded. Fixes bug 3536; bugfix on 0.0.8pre1. Issue
28366 discovered by katmagic.
28367 - Always NUL-terminate the sun_path field of a sockaddr_un before
28368 passing it to the kernel. (Not a security issue: kernels are
28369 smart enough to reject bad sockaddr_uns.) Found by Coverity;
28370 CID #428. Bugfix on Tor 0.2.0.3-alpha.
28371 - Don't stack-allocate the list of supplementary GIDs when we're
28372 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
28373 could take up to 256K, which is way too much stack. Found by
28374 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
28375 - Add BUILDTIMEOUT_SET to the list returned by the 'GETINFO
28376 events/names' control-port command. Bugfix on 0.2.2.9-alpha;
28377 fixes part of bug 3465.
28378 - Fix a memory leak when receiving a descriptor for a hidden
28379 service we didn't ask for. Found by Coverity; CID #30. Bugfix
28383 - Update to the July 1 2011 Maxmind GeoLite Country database.
28386 Changes in version 0.2.2.29-beta - 2011-06-20
28387 Tor 0.2.2.29-beta reverts an accidental behavior change for users who
28388 have bridge lines in their torrc but don't want to use them; gets
28389 us closer to having the control socket feature working on Debian;
28390 and fixes a variety of smaller bugs.
28393 - Revert the UseBridges option to its behavior before 0.2.2.28-beta.
28394 When we changed the default behavior to "use bridges if any
28395 are listed in the torrc", we surprised users who had bridges
28396 in their torrc files but who didn't actually want to use them.
28397 Partial resolution for bug 3354.
28400 - Don't attach new streams to old rendezvous circuits after SIGNAL
28401 NEWNYM. Previously, we would keep using an existing rendezvous
28402 circuit if it remained open (i.e. if it were kept open by a
28403 long-lived stream, or if a new stream were attached to it before
28404 Tor could notice that it was old and no longer in use). Bugfix on
28405 0.1.1.15-rc; fixes bug 3375.
28408 - Fix a bug when using ControlSocketsGroupWritable with User. The
28409 directory's group would be checked against the current group, not
28410 the configured group. Patch by Jérémy Bobbio. Fixes bug 3393;
28411 bugfix on 0.2.2.26-beta.
28412 - Make connection_printf_to_buf()'s behavior sane. Its callers
28413 expect it to emit a CRLF iff the format string ends with CRLF;
28414 it actually emitted a CRLF iff (a) the format string ended with
28415 CRLF or (b) the resulting string was over 1023 characters long or
28416 (c) the format string did not end with CRLF *and* the resulting
28417 string was 1021 characters long or longer. Bugfix on 0.1.1.9-alpha;
28418 fixes part of bug 3407.
28419 - Make send_control_event_impl()'s behavior sane. Its callers
28420 expect it to always emit a CRLF at the end of the string; it
28421 might have emitted extra control characters as well. Bugfix on
28422 0.1.1.9-alpha; fixes another part of bug 3407.
28423 - Make crypto_rand_int() check the value of its input correctly.
28424 Previously, it accepted values up to UINT_MAX, but could return a
28425 negative number if given a value above INT_MAX+1. Found by George
28426 Kadianakis. Fixes bug 3306; bugfix on 0.2.2pre14.
28427 - Avoid a segfault when reading a malformed circuit build state
28428 with more than INT_MAX entries. Found by wanoskarnet. Bugfix on
28430 - When asked about a DNS record type we don't support via a
28431 client DNSPort, reply with NOTIMPL rather than an empty
28432 reply. Patch by intrigeri. Fixes bug 3369; bugfix on 2.0.1-alpha.
28433 - Fix a rare memory leak during stats writing. Found by coverity.
28436 - Update to the June 1 2011 Maxmind GeoLite Country database.
28438 o Code simplifications and refactoring:
28439 - Remove some dead code as indicated by coverity.
28440 - Remove a few dead assignments during router parsing. Found by
28442 - Add some forgotten return value checks during unit tests. Found
28444 - Don't use 1-bit wide signed bit fields. Found by coverity.
28447 Changes in version 0.2.2.28-beta - 2011-06-04
28448 Tor 0.2.2.28-beta makes great progress towards a new stable release: we
28449 fixed a big bug in whether relays stay in the consensus consistently,
28450 we moved closer to handling bridges and hidden services correctly,
28451 and we started the process of better handling the dreaded "my Vidalia
28452 died, and now my Tor demands a password when I try to reconnect to it"
28456 - Don't decide to make a new descriptor when receiving a HUP signal.
28457 This bug has caused a lot of 0.2.2.x relays to disappear from the
28458 consensus periodically. Fixes the most common case of triggering
28459 bug 1810; bugfix on 0.2.2.7-alpha.
28460 - Actually allow nameservers with IPv6 addresses. Fixes bug 2574.
28461 - Don't try to build descriptors if "ORPort auto" is set and we
28462 don't know our actual ORPort yet. Fix for bug 3216; bugfix on
28464 - Resolve a crash that occurred when setting BridgeRelay to 1 with
28465 accounting enabled. Fixes bug 3228; bugfix on 0.2.2.18-alpha.
28466 - Apply circuit timeouts to opened hidden-service-related circuits
28467 based on the correct start time. Previously, we would apply the
28468 circuit build timeout based on time since the circuit's creation;
28469 it was supposed to be applied based on time since the circuit
28470 entered its current state. Bugfix on 0.0.6; fixes part of bug 1297.
28471 - Use the same circuit timeout for client-side introduction
28472 circuits as for other four-hop circuits, rather than the timeout
28473 for single-hop directory-fetch circuits; the shorter timeout may
28474 have been appropriate with the static circuit build timeout in
28475 0.2.1.x and earlier, but caused many hidden service access attempts
28476 to fail with the adaptive CBT introduced in 0.2.2.2-alpha. Bugfix
28477 on 0.2.2.2-alpha; fixes another part of bug 1297.
28478 - In ticket 2511 we fixed a case where you could use an unconfigured
28479 bridge if you had configured it as a bridge the last time you ran
28480 Tor. Now fix another edge case: if you had configured it as a bridge
28481 but then switched to a different bridge via the controller, you
28482 would still be willing to use the old one. Bugfix on 0.2.0.1-alpha;
28486 - Add an __OwningControllerProcess configuration option and a
28487 TAKEOWNERSHIP control-port command. Now a Tor controller can ensure
28488 that when it exits, Tor will shut down. Implements feature 3049.
28489 - If "UseBridges 1" is set and no bridges are configured, Tor will
28490 now refuse to build any circuits until some bridges are set.
28491 If "UseBridges auto" is set, Tor will use bridges if they are
28492 configured and we are not running as a server, but otherwise will
28493 make circuits as usual. The new default is "auto". Patch by anonym,
28494 so the Tails LiveCD can stop automatically revealing you as a Tor
28498 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
28499 - Remove a trailing asterisk from "exit-policy/default" in the
28500 output of the control port command "GETINFO info/names". Bugfix
28502 - Use a wide type to hold sockets when built for 64-bit Windows builds.
28504 - Warn when the user configures two HiddenServiceDir lines that point
28505 to the same directory. Bugfix on 0.0.6 (the version introducing
28506 HiddenServiceDir); fixes bug 3289.
28507 - Remove dead code from rend_cache_lookup_v2_desc_as_dir. Fixes
28508 part of bug 2748; bugfix on 0.2.0.10-alpha.
28509 - Log malformed requests for rendezvous descriptors as protocol
28510 warnings, not warnings. Also, use a more informative log message
28511 in case someone sees it at log level warning without prior
28512 info-level messages. Fixes the other part of bug 2748; bugfix
28514 - Clear the table recording the time of the last request for each
28515 hidden service descriptor from each HS directory on SIGNAL NEWNYM.
28516 Previously, we would clear our HS descriptor cache on SIGNAL
28517 NEWNYM, but if we had previously retrieved a descriptor (or tried
28518 to) from every directory responsible for it, we would refuse to
28519 fetch it again for up to 15 minutes. Bugfix on 0.2.2.25-alpha;
28521 - Fix a log message that said "bits" while displaying a value in
28522 bytes. Found by wanoskarnet. Fixes bug 3318; bugfix on
28524 - When checking for 1024-bit keys, check for 1024 bits, not 128
28525 bytes. This allows Tor to correctly discard keys of length 1017
28526 through 1023. Bugfix on 0.0.9pre5.
28529 - Relays now log the reason for publishing a new relay descriptor,
28530 so we have a better chance of hunting down instances of bug 1810.
28531 Resolves ticket 3252.
28532 - Revise most log messages that refer to nodes by nickname to
28533 instead use the "$key=nickname at address" format. This should be
28534 more useful, especially since nicknames are less and less likely
28535 to be unique. Resolves ticket 3045.
28536 - Log (at info level) when purging pieces of hidden-service-client
28537 state because of SIGNAL NEWNYM.
28540 - Remove undocumented option "-F" from tor-resolve: it hasn't done
28541 anything since 0.2.1.16-rc.
28544 Changes in version 0.2.2.27-beta - 2011-05-18
28545 Tor 0.2.2.27-beta fixes a bridge-related stability bug in the previous
28546 release, and also adds a few more general bugfixes.
28549 - Fix a crash bug when changing bridges in a running Tor process.
28550 Fixes bug 3213; bugfix on 0.2.2.26-beta.
28551 - When the controller configures a new bridge, don't wait 10 to 60
28552 seconds before trying to fetch its descriptor. Bugfix on
28553 0.2.0.3-alpha; fixes bug 3198 (suggested by 2355).
28556 - Require that onion keys have exponent 65537 in microdescriptors too.
28557 Fixes more of bug 3207; bugfix on 0.2.2.26-beta.
28558 - Tor used to limit HttpProxyAuthenticator values to 48 characters.
28559 Changed the limit to 512 characters by removing base64 newlines.
28560 Fixes bug 2752. Fix by Michael Yakubovich.
28561 - When a client starts or stops using bridges, never use a circuit
28562 that was built before the configuration change. This behavior could
28563 put at risk a user who uses bridges to ensure that her traffic
28564 only goes to the chosen addresses. Bugfix on 0.2.0.3-alpha; fixes
28568 Changes in version 0.2.2.26-beta - 2011-05-17
28569 Tor 0.2.2.26-beta fixes a variety of potential privacy problems. It
28570 also introduces a new "socksport auto" approach that should make it
28571 easier to run multiple Tors on the same system, and does a lot of
28572 cleanup to get us closer to a release candidate.
28574 o Security/privacy fixes:
28575 - Replace all potentially sensitive memory comparison operations
28576 with versions whose runtime does not depend on the data being
28577 compared. This will help resist a class of attacks where an
28578 adversary can use variations in timing information to learn
28579 sensitive data. Fix for one case of bug 3122. (Safe memcmp
28580 implementation by Robert Ransom based partially on code by DJB.)
28581 - When receiving a hidden service descriptor, check that it is for
28582 the hidden service we wanted. Previously, Tor would store any
28583 hidden service descriptors that a directory gave it, whether it
28584 wanted them or not. This wouldn't have let an attacker impersonate
28585 a hidden service, but it did let directories pre-seed a client
28586 with descriptors that it didn't want. Bugfix on 0.0.6.
28587 - On SIGHUP, do not clear out all TrackHostExits mappings, client
28588 DNS cache entries, and virtual address mappings: that's what
28589 NEWNYM is for. Fixes bug 1345; bugfix on 0.1.0.1-rc.
28592 - The options SocksPort, ControlPort, and so on now all accept a
28593 value "auto" that opens a socket on an OS-selected port. A
28594 new ControlPortWriteToFile option tells Tor to write its
28595 actual control port or ports to a chosen file. If the option
28596 ControlPortFileGroupReadable is set, the file is created as
28597 group-readable. Now users can run two Tor clients on the same
28598 system without needing to manually mess with parameters. Resolves
28599 part of ticket 3076.
28600 - Set SO_REUSEADDR on all sockets, not just listeners. This should
28601 help busy exit nodes avoid running out of useable ports just
28602 because all the ports have been used in the near past. Resolves
28606 - New "GETINFO net/listeners/(type)" controller command to return
28607 a list of addresses and ports that are bound for listeners for a
28608 given connection type. This is useful when the user has configured
28609 "SocksPort auto" and the controller needs to know which port got
28610 chosen. Resolves another part of ticket 3076.
28611 - Add a new ControlSocketsGroupWritable configuration option: when
28612 it is turned on, ControlSockets are group-writeable by the default
28613 group of the current user. Patch by Jérémy Bobbio; implements
28615 - Tor now refuses to create a ControlSocket in a directory that is
28616 world-readable (or group-readable if ControlSocketsGroupWritable
28617 is 0). This is necessary because some operating systems do not
28618 enforce permissions on an AF_UNIX sockets. Permissions on the
28619 directory holding the socket, however, seems to work everywhere.
28620 - Rate-limit a warning about failures to download v2 networkstatus
28621 documents. Resolves part of bug 1352.
28622 - Backport code from 0.2.3.x that allows directory authorities to
28623 clean their microdescriptor caches. Needed to resolve bug 2230.
28624 - When an HTTPS proxy reports "403 Forbidden", we now explain
28625 what it means rather than calling it an unexpected status code.
28626 Closes bug 2503. Patch from Michael Yakubovich.
28627 - Update to the May 1 2011 Maxmind GeoLite Country database.
28630 - Authorities now clean their microdesc cache periodically and when
28631 reading from disk initially, not only when adding new descriptors.
28632 This prevents a bug where we could lose microdescriptors. Bugfix
28633 on 0.2.2.6-alpha. Fixes bug 2230.
28634 - Do not crash when our configuration file becomes unreadable, for
28635 example due to a permissions change, between when we start up
28636 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
28638 - Avoid a bug that would keep us from replacing a microdescriptor
28639 cache on Windows. (We would try to replace the file while still
28640 holding it open. That's fine on Unix, but Windows doesn't let us
28641 do that.) Bugfix on 0.2.2.6-alpha; bug found by wanoskarnet.
28642 - Add missing explanations for the authority-related torrc options
28643 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey in the
28644 man page. Resolves issue 2379.
28645 - As an authority, do not upload our own vote or signature set to
28646 ourself. It would tell us nothing new, and as of 0.2.2.24-alpha,
28647 it would get flagged as a duplicate. Resolves bug 3026.
28648 - Accept hidden service descriptors if we think we might be a hidden
28649 service directory, regardless of what our consensus says. This
28650 helps robustness, since clients and hidden services can sometimes
28651 have a more up-to-date view of the network consensus than we do,
28652 and if they think that the directory authorities list us a HSDir,
28653 we might actually be one. Related to bug 2732; bugfix on
28655 - When a controller changes TrackHostExits, remove mappings for
28656 hosts that should no longer have their exits tracked. Bugfix on
28658 - When a controller changes VirtualAddrNetwork, remove any mappings
28659 for hosts that were automapped to the old network. Bugfix on
28661 - When a controller changes one of the AutomapHosts* options, remove
28662 any mappings for hosts that should no longer be automapped. Bugfix
28664 - Do not reset the bridge descriptor download status every time we
28665 re-parse our configuration or get a configuration change. Fixes
28666 bug 3019; bugfix on 0.2.0.3-alpha.
28668 o Minor bugfixes (code cleanup):
28669 - When loading the microdesc journal, remember its current size.
28670 In 0.2.2, this helps prevent the microdesc journal from growing
28671 without limit on authorities (who are the only ones to use it in
28672 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
28673 Fix posted by "cypherpunks."
28674 - The microdesc journal is supposed to get rebuilt only if it is
28675 at least _half_ the length of the store, not _twice_ the length
28676 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
28677 - Fix a potential null-pointer dereference while computing a
28678 consensus. Bugfix on 0.2.0.3-alpha, found with the help of
28680 - Avoid a possible null-pointer dereference when rebuilding the mdesc
28681 cache without actually having any descriptors to cache. Bugfix on
28682 0.2.2.6-alpha. Issue discovered using clang's static analyzer.
28683 - If we fail to compute the identity digest of a v3 legacy keypair,
28684 warn, and don't use a buffer-full of junk instead. Bugfix on
28685 0.2.1.1-alpha; fixes bug 3106.
28686 - Resolve an untriggerable issue in smartlist_string_num_isin(),
28687 where if the function had ever in the future been used to check
28688 for the presence of a too-large number, it would have given an
28689 incorrect result. (Fortunately, we only used it for 16-bit
28690 values.) Fixes bug 3175; bugfix on 0.1.0.1-rc.
28691 - Require that introduction point keys and onion handshake keys
28692 have a public exponent of 65537. Starts to fix bug 3207; bugfix
28695 o Removed features:
28696 - Caches no longer download and serve v2 networkstatus documents
28697 unless FetchV2Networkstatus flag is set: these documents haven't
28698 haven't been used by clients or relays since 0.2.0.x. Resolves
28702 Changes in version 0.2.3.1-alpha - 2011-05-05
28703 Tor 0.2.3.1-alpha adds some new experimental features, including support
28704 for an improved network IO backend, IOCP networking on Windows,
28705 microdescriptor caching, "fast-start" support for streams, and automatic
28706 home router configuration. There are also numerous internal improvements
28707 to try to make the code easier for developers to work with.
28709 This is the first alpha release in a new series, so expect there to be
28710 bugs. Users who would rather test out a more stable branch should
28711 stay with 0.2.2.x for now.
28714 - Tor can now optionally build with the "bufferevents" buffered IO
28715 backend provided by Libevent 2. To use this feature, make sure you
28716 have the latest possible version of Libevent, and pass the
28717 --enable-bufferevents flag to configure when building Tor from
28718 source. This feature will make our networking code more flexible,
28719 let us stack layers on each other, and let us use more efficient
28720 zero-copy transports where available.
28721 - As an experimental feature, Tor can use IOCP for networking on Windows.
28722 Once this code is tuned and optimized, it promises much better
28723 performance than the select-based backend we've used in the past. To
28724 try this feature, you must build Tor with Libevent 2, configure Tor
28725 with the "bufferevents" buffered IO backend, and add "DisableIOCP 0" to
28726 your torrc. There are known bugs here: only try this if you can help
28727 debug it as it breaks.
28728 - The EntryNodes option can now include country codes like {de} or IP
28729 addresses or network masks. Previously we had disallowed these options
28730 because we didn't have an efficient way to keep the list up to
28731 date. Fixes bug 1982, but see bug 2798 for an unresolved issue here.
28732 - Exit nodes now accept and queue data on not-yet-connected streams.
28733 Previously, the client wasn't allowed to send data until the stream was
28734 connected, which slowed down all connections. This change will enable
28735 clients to perform a "fast-start" on streams and send data without
28736 having to wait for a confirmation that the stream has opened. (Patch
28737 from Ian Goldberg; implements the server side of Proposal 174.)
28738 - Tor now has initial support for automatic port mapping on the many
28739 home routers that support NAT-PMP or UPnP. (Not yet supported on
28740 Windows). To build the support code, you'll need to have libnatpnp
28741 library and/or the libminiupnpc library, and you'll need to enable the
28742 feature specifically by passing "--enable-upnp" and/or
28743 "--enable-natpnp" to configure. To turn it on, use the new
28744 PortForwarding option.
28745 - Caches now download, cache, and serve multiple "flavors" of the
28746 consensus, including a flavor that describes microdescriptors.
28747 - Caches now download, cache, and serve microdescriptors -- small
28748 summaries of router descriptors that are authenticated by all of the
28749 directory authorities. Once enough caches are running this code,
28750 clients will be able to save significant amounts of directory bandwidth
28751 by downloading microdescriptors instead of router descriptors.
28754 - Make logging resolution configurable with a new LogTimeGranularity
28755 option, and change the default from 1 millisecond to 1 second.
28756 Implements enhancement 1668.
28757 - We log which torrc file we're using on startup. Implements ticket
28759 - Ordinarily, Tor does not count traffic from private addresses (like
28760 127.0.0.1 or 10.0.0.1) when calculating rate limits or accounting.
28761 There is now a new option, CountPrivateBandwidth, to disable this
28762 behavior. Patch from Daniel Cagara.
28763 - New --enable-static-tor configure option for building Tor as
28764 statically as possible. Idea, general hackery and thoughts from
28765 Alexei Czeskis, John Gilmore, Jacob Appelbaum. Implements ticket
28767 - If you set the NumCPUs option to 0, Tor will now try to detect how
28768 many CPUs you have. This is the new default behavior.
28769 - Turn on directory request statistics by default and include them in
28770 extra-info descriptors. Don't break if we have no GeoIP database.
28771 - Relays that set "ConnDirectionStatistics 1" write statistics on the
28772 bidirectional use of connections to disk every 24 hours.
28773 - Add a GeoIP file digest to the extra-info descriptor. Implements
28775 - The NodeFamily option -- which let you declare that you want to
28776 consider nodes to be part of a family whether they list themselves
28777 that way or not -- now allows IP address ranges and country codes.
28778 - Add a new 'Heartbeat' log message type to periodically log a message
28779 describing Tor's status at level Notice. This feature is meant for
28780 operators who log at notice, and want to make sure that their Tor
28781 server is still working. Implementation by George Kadianakis.
28783 o Minor bugfixes (on 0.2.2.25-alpha):
28784 - When loading the microdesc journal, remember its current size.
28785 In 0.2.2, this helps prevent the microdesc journal from growing
28786 without limit on authorities (who are the only ones to use it in
28787 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
28788 Fix posted by "cypherpunks."
28789 - The microdesc journal is supposed to get rebuilt only if it is
28790 at least _half_ the length of the store, not _twice_ the length
28791 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
28792 - If as an authority we fail to compute the identity digest of a v3
28793 legacy keypair, warn, and don't use a buffer-full of junk instead.
28794 Bugfix on 0.2.1.1-alpha; fixes bug 3106.
28795 - Authorities now clean their microdesc cache periodically and when
28796 reading from disk initially, not only when adding new descriptors.
28797 This prevents a bug where we could lose microdescriptors. Bugfix
28800 o Minor features (controller):
28801 - Add a new SIGNAL event to the controller interface so that
28802 controllers can be notified when Tor handles a signal. Resolves
28803 issue 1955. Patch by John Brooks.
28804 - Add a new GETINFO option to get total bytes read and written. Patch
28805 from pipe, revised by atagar. Resolves ticket 2345.
28806 - Implement some GETINFO controller fields to provide information about
28807 the Tor process's pid, euid, username, and resource limits.
28810 - Our build system requires automake 1.6 or later to create the
28811 Makefile.in files. Previously, you could have used 1.4.
28812 This only affects developers and people building Tor from git;
28813 people who build Tor from the source distribution without changing
28814 the Makefile.am files should be fine.
28815 - Our autogen.sh script uses autoreconf to launch autoconf, automake, and
28816 so on. This is more robust against some of the failure modes
28817 associated with running the autotools pieces on their own.
28819 o Minor packaging issues:
28820 - On OpenSUSE, create the /var/run/tor directory on startup if it is not
28821 already created. Patch from Andreas Stieger. Fixes bug 2573.
28823 o Code simplifications and refactoring:
28824 - A major revision to our internal node-selecting and listing logic.
28825 Tor already had at least two major ways to look at the question of
28826 "which Tor servers do we know about": a list of router descriptors,
28827 and a list of entries in the current consensus. With
28828 microdescriptors, we're adding a third. Having so many systems
28829 without an abstraction layer over them was hurting the codebase.
28830 Now, we have a new "node_t" abstraction that presents a consistent
28831 interface to a client's view of a Tor node, and holds (nearly) all
28832 of the mutable state formerly in routerinfo_t and routerstatus_t.
28833 - The helper programs tor-gencert, tor-resolve, and tor-checkkey
28834 no longer link against Libevent: they never used it, but
28835 our library structure used to force them to link it.
28837 o Removed features:
28838 - Remove some old code to work around even older versions of Tor that
28839 used forked processes to handle DNS requests. Such versions of Tor
28840 are no longer in use as servers.
28842 o Documentation fixes:
28843 - Correct a broken faq link in the INSTALL file. Fixes bug 2307.
28844 - Add missing documentation for the authority-related torrc options
28845 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey. Resolves
28849 Changes in version 0.2.2.25-alpha - 2011-04-29
28850 Tor 0.2.2.25-alpha fixes many bugs: hidden service clients are more
28851 robust, routers no longer overreport their bandwidth, Win7 should crash
28852 a little less, and NEWNYM (as used by Vidalia's "new identity" button)
28853 now prevents hidden service-related activity from being linkable. It
28854 provides more information to Vidalia so you can see if your bridge is
28855 working. Also, 0.2.2.25-alpha revamps the Entry/Exit/ExcludeNodes and
28856 StrictNodes configuration options to make them more reliable, more
28857 understandable, and more regularly applied. If you use those options,
28858 please see the revised documentation for them in the manual page.
28861 - Relays were publishing grossly inflated bandwidth values because
28862 they were writing their state files wrong--now they write the
28863 correct value. Also, resume reading bandwidth history from the
28864 state file correctly. Fixes bug 2704; bugfix on 0.2.2.23-alpha.
28865 - Improve hidden service robustness: When we find that we have
28866 extended a hidden service's introduction circuit to a relay not
28867 listed as an introduction point in the HS descriptor we currently
28868 have, retry with an introduction point from the current
28869 descriptor. Previously we would just give up. Fixes bugs 1024 and
28870 1930; bugfix on 0.2.0.10-alpha.
28871 - Clients now stop trying to use an exit node associated with a given
28872 destination by TrackHostExits if they fail to reach that exit node.
28873 Fixes bug 2999. Bugfix on 0.2.0.20-rc.
28874 - Fix crash bug on platforms where gmtime and localtime can return
28875 NULL. Windows 7 users were running into this one. Fixes part of bug
28876 2077. Bugfix on all versions of Tor. Found by boboper.
28878 o Security and stability fixes:
28879 - Don't double-free a parsable, but invalid, microdescriptor, even if
28880 it is followed in the blob we're parsing by an unparsable
28881 microdescriptor. Fixes an issue reported in a comment on bug 2954.
28882 Bugfix on 0.2.2.6-alpha; fix by "cypherpunks".
28883 - If the Nickname configuration option isn't given, Tor would pick a
28884 nickname based on the local hostname as the nickname for a relay.
28885 Because nicknames are not very important in today's Tor and the
28886 "Unnamed" nickname has been implemented, this is now problematic
28887 behavior: It leaks information about the hostname without being
28888 useful at all. Fixes bug 2979; bugfix on 0.1.2.2-alpha, which
28889 introduced the Unnamed nickname. Reported by tagnaq.
28890 - Fix an uncommon assertion failure when running with DNSPort under
28891 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
28892 - Avoid linkability based on cached hidden service descriptors: forget
28893 all hidden service descriptors cached as a client when processing a
28894 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
28897 - Export GeoIP information on bridge usage to controllers even if we
28898 have not yet been running for 24 hours. Now Vidalia bridge operators
28899 can get more accurate and immediate feedback about their
28900 contributions to the network.
28902 o Major features and bugfixes (node selection):
28903 - Revise and reconcile the meaning of the ExitNodes, EntryNodes,
28904 ExcludeEntryNodes, ExcludeExitNodes, ExcludeNodes, and StrictNodes
28905 options. Previously, we had been ambiguous in describing what
28906 counted as an "exit" node, and what operations exactly "StrictNodes
28907 0" would permit. This created confusion when people saw nodes built
28908 through unexpected circuits, and made it hard to tell real bugs from
28909 surprises. Now the intended behavior is:
28910 . "Exit", in the context of ExitNodes and ExcludeExitNodes, means
28911 a node that delivers user traffic outside the Tor network.
28912 . "Entry", in the context of EntryNodes, means a node used as the
28913 first hop of a multihop circuit. It doesn't include direct
28914 connections to directory servers.
28915 . "ExcludeNodes" applies to all nodes.
28916 . "StrictNodes" changes the behavior of ExcludeNodes only. When
28917 StrictNodes is set, Tor should avoid all nodes listed in
28918 ExcludeNodes, even when it will make user requests fail. When
28919 StrictNodes is *not* set, then Tor should follow ExcludeNodes
28920 whenever it can, except when it must use an excluded node to
28921 perform self-tests, connect to a hidden service, provide a
28922 hidden service, fulfill a .exit request, upload directory
28923 information, or fetch directory information.
28924 Collectively, the changes to implement the behavior fix bug 1090.
28925 - ExcludeNodes now takes precedence over EntryNodes and ExitNodes: if
28926 a node is listed in both, it's treated as excluded.
28927 - ExcludeNodes now applies to directory nodes -- as a preference if
28928 StrictNodes is 0, or an absolute requirement if StrictNodes is 1.
28929 Don't exclude all the directory authorities and set StrictNodes to 1
28930 unless you really want your Tor to break.
28931 - ExcludeNodes and ExcludeExitNodes now override exit enclaving.
28932 - ExcludeExitNodes now overrides .exit requests.
28933 - We don't use bridges listed in ExcludeNodes.
28934 - When StrictNodes is 1:
28935 . We now apply ExcludeNodes to hidden service introduction points
28936 and to rendezvous points selected by hidden service users. This
28937 can make your hidden service less reliable: use it with caution!
28938 . If we have used ExcludeNodes on ourself, do not try relay
28939 reachability self-tests.
28940 . If we have excluded all the directory authorities, we will not
28941 even try to upload our descriptor if we're a relay.
28942 . Do not honor .exit requests to an excluded node.
28943 - Remove a misfeature that caused us to ignore the Fast/Stable flags
28944 when ExitNodes is set. Bugfix on 0.2.2.7-alpha.
28945 - When the set of permitted nodes changes, we now remove any mappings
28946 introduced via TrackExitHosts to now-excluded nodes. Bugfix on
28948 - We never cannibalize a circuit that had excluded nodes on it, even
28949 if StrictNodes is 0. Bugfix on 0.1.0.1-rc.
28950 - Revert a change where we would be laxer about attaching streams to
28951 circuits than when building the circuits. This was meant to prevent
28952 a set of bugs where streams were never attachable, but our improved
28953 code here should make this unnecessary. Bugfix on 0.2.2.7-alpha.
28954 - Keep track of how many times we launch a new circuit to handle a
28955 given stream. Too many launches could indicate an inconsistency
28956 between our "launch a circuit to handle this stream" logic and our
28957 "attach this stream to one of the available circuits" logic.
28958 - Improve log messages related to excluded nodes.
28961 - Fix a spurious warning when moving from a short month to a long
28962 month on relays with month-based BandwidthAccounting. Bugfix on
28963 0.2.2.17-alpha; fixes bug 3020.
28964 - When a client finds that an origin circuit has run out of 16-bit
28965 stream IDs, we now mark it as unusable for new streams. Previously,
28966 we would try to close the entire circuit. Bugfix on 0.0.6.
28967 - Add a forgotten cast that caused a compile warning on OS X 10.6.
28968 Bugfix on 0.2.2.24-alpha.
28969 - Be more careful about reporting the correct error from a failed
28970 connect() system call. Under some circumstances, it was possible to
28971 look at an incorrect value for errno when sending the end reason.
28972 Bugfix on 0.1.0.1-rc.
28973 - Correctly handle an "impossible" overflow cases in connection byte
28974 counting, where we write or read more than 4GB on an edge connection
28975 in a single second. Bugfix on 0.1.2.8-beta.
28976 - Correct the warning displayed when a rendezvous descriptor exceeds
28977 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
28979 - Clients and hidden services now use HSDir-flagged relays for hidden
28980 service descriptor downloads and uploads even if the relays have no
28981 DirPort set and the client has disabled TunnelDirConns. This will
28982 eventually allow us to give the HSDir flag to relays with no
28983 DirPort. Fixes bug 2722; bugfix on 0.2.1.6-alpha.
28984 - Downgrade "no current certificates known for authority" message from
28985 Notice to Info. Fixes bug 2899; bugfix on 0.2.0.10-alpha.
28986 - Make the SIGNAL DUMP control-port command work on FreeBSD. Fixes bug
28987 2917. Bugfix on 0.1.1.1-alpha.
28988 - Only limit the lengths of single HS descriptors, even when multiple
28989 HS descriptors are published to an HSDir relay in a single POST
28990 operation. Fixes bug 2948; bugfix on 0.2.1.5-alpha. Found by hsdir.
28991 - Write the current time into the LastWritten line in our state file,
28992 rather than the time from the previous write attempt. Also, stop
28993 trying to use a time of -1 in our log statements. Fixes bug 3039;
28994 bugfix on 0.2.2.14-alpha.
28995 - Be more consistent in our treatment of file system paths. "~" should
28996 get expanded to the user's home directory in the Log config option.
28997 Fixes bug 2971; bugfix on 0.2.0.1-alpha, which introduced the
28998 feature for the -f and --DataDirectory options.
29001 - Make sure every relay writes a state file at least every 12 hours.
29002 Previously, a relay could go for weeks without writing its state
29003 file, and on a crash could lose its bandwidth history, capacity
29004 estimates, client country statistics, and so on. Addresses bug 3012.
29005 - Send END_STREAM_REASON_NOROUTE in response to EHOSTUNREACH errors.
29006 Clients before 0.2.1.27 didn't handle NOROUTE correctly, but such
29007 clients are already deprecated because of security bugs.
29008 - Don't allow v0 hidden service authorities to act as clients.
29009 Required by fix for bug 3000.
29010 - Ignore SIGNAL NEWNYM commands on relay-only Tor instances. Required
29011 by fix for bug 3000.
29012 - Ensure that no empty [dirreq-](read|write)-history lines are added
29013 to an extrainfo document. Implements ticket 2497.
29015 o Code simplification and refactoring:
29016 - Remove workaround code to handle directory responses from servers
29017 that had bug 539 (they would send HTTP status 503 responses _and_
29018 send a body too). Since only server versions before
29019 0.2.0.16-alpha/0.1.2.19 were affected, there is no longer reason to
29020 keep the workaround in place.
29021 - Remove the old 'fuzzy time' logic. It was supposed to be used for
29022 handling calculations where we have a known amount of clock skew and
29023 an allowed amount of unknown skew. But we only used it in three
29024 places, and we never adjusted the known/unknown skew values. This is
29025 still something we might want to do someday, but if we do, we'll
29026 want to do it differently.
29027 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
29028 None of the cases where we did this before were wrong, but by making
29029 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
29030 - Use GetTempDir to find the proper temporary directory location on
29031 Windows when generating temporary files for the unit tests. Patch by
29035 Changes in version 0.2.2.24-alpha - 2011-04-08
29036 Tor 0.2.2.24-alpha fixes a variety of bugs, including a big bug that
29037 prevented Tor clients from effectively using "multihomed" bridges,
29038 that is, bridges that listen on multiple ports or IP addresses so users
29039 can continue to use some of their addresses even if others get blocked.
29042 - Fix a bug where bridge users who configure the non-canonical
29043 address of a bridge automatically switch to its canonical
29044 address. If a bridge listens at more than one address, it should be
29045 able to advertise those addresses independently and any non-blocked
29046 addresses should continue to work. Bugfix on Tor 0.2.0.x. Fixes
29048 - If you configured Tor to use bridge A, and then quit and
29049 configured Tor to use bridge B instead, it would happily continue
29050 to use bridge A if it's still reachable. While this behavior is
29051 a feature if your goal is connectivity, in some scenarios it's a
29052 dangerous bug. Bugfix on Tor 0.2.0.1-alpha; fixes bug 2511.
29053 - Directory authorities now use data collected from their own
29054 uptime observations when choosing whether to assign the HSDir flag
29055 to relays, instead of trusting the uptime value the relay reports in
29056 its descriptor. This change helps prevent an attack where a small
29057 set of nodes with frequently-changing identity keys can blackhole
29058 a hidden service. (Only authorities need upgrade; others will be
29059 fine once they do.) Bugfix on 0.2.0.10-alpha; fixes bug 2709.
29062 - When we restart our relay, we might get a successful connection
29063 from the outside before we've started our reachability tests,
29064 triggering a warning: "ORPort found reachable, but I have no
29065 routerinfo yet. Failing to inform controller of success." This
29066 bug was harmless unless Tor is running under a controller
29067 like Vidalia, in which case the controller would never get a
29068 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
29070 - Make directory authorities more accurate at recording when
29071 relays that have failed several reachability tests became
29072 unreachable, so we can provide more accuracy at assigning Stable,
29073 Guard, HSDir, etc flags. Bugfix on 0.2.0.6-alpha. Resolves bug 2716.
29074 - Fix an issue that prevented static linking of libevent on
29075 some platforms (notably Linux). Fixes bug 2698; bugfix on
29076 versions 0.2.1.23/0.2.2.8-alpha (the versions introducing
29077 the --with-static-libevent configure option).
29078 - We now ask the other side of a stream (the client or the exit)
29079 for more data on that stream when the amount of queued data on
29080 that stream dips low enough. Previously, we wouldn't ask the
29081 other side for more data until either it sent us more data (which
29082 it wasn't supposed to do if it had exhausted its window!) or we
29083 had completely flushed all our queued data. This flow control fix
29084 should improve throughput. Fixes bug 2756; bugfix on the earliest
29085 released versions of Tor (svn commit r152).
29086 - Avoid a double-mark-for-free warning when failing to attach a
29087 transparent proxy connection. (We thought we had fixed this in
29088 0.2.2.23-alpha, but it turns out our fix was checking the wrong
29089 connection.) Fixes bug 2757; bugfix on 0.1.2.1-alpha (the original
29090 bug) and 0.2.2.23-alpha (the incorrect fix).
29091 - When warning about missing zlib development packages during compile,
29092 give the correct package names. Bugfix on 0.2.0.1-alpha.
29095 - Directory authorities now log the source of a rejected POSTed v3
29096 networkstatus vote.
29097 - Make compilation with clang possible when using
29098 --enable-gcc-warnings by removing two warning options that clang
29099 hasn't implemented yet and by fixing a few warnings. Implements
29101 - When expiring circuits, use microsecond timers rather than
29102 one-second timers. This can avoid an unpleasant situation where a
29103 circuit is launched near the end of one second and expired right
29104 near the beginning of the next, and prevent fluctuations in circuit
29106 - Use computed circuit-build timeouts to decide when to launch
29107 parallel introduction circuits for hidden services. (Previously,
29108 we would retry after 15 seconds.)
29109 - Update to the April 1 2011 Maxmind GeoLite Country database.
29112 - Create the /var/run/tor directory on startup on OpenSUSE if it is
29113 not already created. Patch from Andreas Stieger. Fixes bug 2573.
29115 o Documentation changes:
29116 - Modernize the doxygen configuration file slightly. Fixes bug 2707.
29117 - Resolve all doxygen warnings except those for missing documentation.
29119 - Add doxygen documentation for more functions, fields, and types.
29122 Changes in version 0.2.2.23-alpha - 2011-03-08
29123 Tor 0.2.2.23-alpha lets relays record their bandwidth history so when
29124 they restart they don't lose their bandwidth capacity estimate. This
29125 release also fixes a diverse set of user-facing bugs, ranging from
29126 relays overrunning their rate limiting to clients falsely warning about
29127 clock skew to bridge descriptor leaks by our bridge directory authority.
29130 - Stop sending a CLOCK_SKEW controller status event whenever
29131 we fetch directory information from a relay that has a wrong clock.
29132 Instead, only inform the controller when it's a trusted authority
29133 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
29134 the rest of bug 1074.
29135 - Fix an assert in parsing router descriptors containing IPv6
29136 addresses. This one took down the directory authorities when
29137 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
29138 - Make the bridge directory authority refuse to answer directory
29139 requests for "all" descriptors. It used to include bridge
29140 descriptors in its answer, which was a major information leak.
29141 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
29142 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
29143 Tor would ignore their RelayBandwidthBurst setting,
29144 potentially using more bandwidth than expected. Bugfix on
29145 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
29146 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
29147 hidserv" in her torrc. The 'hidserv' argument never controlled
29148 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
29151 - Relays now save observed peak bandwidth throughput rates to their
29152 state file (along with total usage, which was already saved)
29153 so that they can determine their correct estimated bandwidth on
29154 restart. Resolves bug 1863, where Tor relays would reset their
29155 estimated bandwidth to 0 after restarting.
29156 - Directory authorities now take changes in router IP address and
29157 ORPort into account when determining router stability. Previously,
29158 if a router changed its IP or ORPort, the authorities would not
29159 treat it as having any downtime for the purposes of stability
29160 calculation, whereas clients would experience downtime since the
29161 change could take a while to propagate to them. Resolves issue 1035.
29162 - Enable Address Space Layout Randomization (ASLR) and Data Execution
29163 Prevention (DEP) by default on Windows to make it harder for
29164 attackers to exploit vulnerabilities. Patch from John Brooks.
29166 o Minor bugfixes (on 0.2.1.x and earlier):
29167 - Fix a rare crash bug that could occur when a client was configured
29168 with a large number of bridges. Fixes bug 2629; bugfix on
29169 0.2.1.2-alpha. Bugfix by trac user "shitlei".
29170 - Avoid a double mark-for-free warning when failing to attach a
29171 transparent proxy connection. Bugfix on 0.1.2.1-alpha. Fixes
29173 - Correctly detect failure to allocate an OpenSSL BIO. Fixes bug 2378;
29174 found by "cypherpunks". This bug was introduced before the first
29175 Tor release, in svn commit r110.
29176 - Country codes aren't supported in EntryNodes until 0.2.3.x, so
29177 don't mention them in the manpage. Fixes bug 2450; issue
29178 spotted by keb and G-Lo.
29179 - Fix a bug in bandwidth history state parsing that could have been
29180 triggered if a future version of Tor ever changed the timing
29181 granularity at which bandwidth history is measured. Bugfix on
29182 Tor 0.1.1.11-alpha.
29183 - When a relay decides that its DNS is too broken for it to serve
29184 as an exit server, it advertised itself as a non-exit, but
29185 continued to act as an exit. This could create accidental
29186 partitioning opportunities for users. Instead, if a relay is
29187 going to advertise reject *:* as its exit policy, it should
29188 really act with exit policy "reject *:*". Fixes bug 2366.
29189 Bugfix on Tor 0.1.2.5-alpha. Bugfix by user "postman" on trac.
29190 - In the special case where you configure a public exit relay as your
29191 bridge, Tor would be willing to use that exit relay as the last
29192 hop in your circuit as well. Now we fail that circuit instead.
29193 Bugfix on 0.2.0.12-alpha. Fixes bug 2403. Reported by "piebeer".
29194 - Fix a bug with our locking implementation on Windows that couldn't
29195 correctly detect when a file was already locked. Fixes bug 2504,
29196 bugfix on 0.2.1.6-alpha.
29197 - Fix IPv6-related connect() failures on some platforms (BSD, OS X).
29198 Bugfix on 0.2.0.3-alpha; fixes first part of bug 2660. Patch by
29200 - Set target port in get_interface_address6() correctly. Bugfix
29201 on 0.1.1.4-alpha and 0.2.0.3-alpha; fixes second part of bug 2660.
29202 - Directory authorities are now more robust to hops back in time
29203 when calculating router stability. Previously, if a run of uptime
29204 or downtime appeared to be negative, the calculation could give
29205 incorrect results. Bugfix on 0.2.0.6-alpha; noticed when fixing
29207 - Fix an assert that got triggered when using the TestingTorNetwork
29208 configuration option and then issuing a GETINFO config-text control
29209 command. Fixes bug 2250; bugfix on 0.2.1.2-alpha.
29211 o Minor bugfixes (on 0.2.2.x):
29212 - Clients should not weight BadExit nodes as Exits in their node
29213 selection. Similarly, directory authorities should not count BadExit
29214 bandwidth as Exit bandwidth when computing bandwidth-weights.
29215 Bugfix on 0.2.2.10-alpha; fixes bug 2203.
29216 - Correctly clear our dir_read/dir_write history when there is an
29217 error parsing any bw history value from the state file. Bugfix on
29218 Tor 0.2.2.15-alpha.
29219 - Resolve a bug in verifying signatures of directory objects
29220 with digests longer than SHA1. Bugfix on 0.2.2.20-alpha.
29221 Fixes bug 2409. Found by "piebeer".
29222 - Bridge authorities no longer crash on SIGHUP when they try to
29223 publish their relay descriptor to themselves. Fixes bug 2572. Bugfix
29227 - Log less aggressively about circuit timeout changes, and improve
29228 some other circuit timeout messages. Resolves bug 2004.
29229 - Log a little more clearly about the times at which we're no longer
29230 accepting new connections. Resolves bug 2181.
29231 - Reject attempts at the client side to open connections to private
29232 IP addresses (like 127.0.0.1, 10.0.0.1, and so on) with
29233 a randomly chosen exit node. Attempts to do so are always
29234 ill-defined, generally prevented by exit policies, and usually
29235 in error. This will also help to detect loops in transparent
29236 proxy configurations. You can disable this feature by setting
29237 "ClientRejectInternalAddresses 0" in your torrc.
29238 - Always treat failure to allocate an RSA key as an unrecoverable
29240 - Update to the March 1 2011 Maxmind GeoLite Country database.
29242 o Minor features (log subsystem):
29243 - Add documentation for configuring logging at different severities in
29244 different log domains. We've had this feature since 0.2.1.1-alpha,
29245 but for some reason it never made it into the manpage. Fixes
29247 - Make it simpler to specify "All log domains except for A and B".
29248 Previously you needed to say "[*,~A,~B]". Now you can just say
29250 - Add a "LogMessageDomains 1" option to include the domains of log
29251 messages along with the messages. Without this, there's no way
29252 to use log domains without reading the source or doing a lot
29255 o Packaging changes:
29256 - Stop shipping the Tor specs files and development proposal documents
29257 in the tarball. They are now in a separate git repository at
29258 git://git.torproject.org/torspec.git
29261 Changes in version 0.2.1.30 - 2011-02-23
29262 Tor 0.2.1.30 fixes a variety of less critical bugs. The main other
29263 change is a slight tweak to Tor's TLS handshake that makes relays
29264 and bridges that run this new version reachable from Iran again.
29265 We don't expect this tweak will win the arms race long-term, but it
29266 buys us time until we roll out a better solution.
29269 - Stop sending a CLOCK_SKEW controller status event whenever
29270 we fetch directory information from a relay that has a wrong clock.
29271 Instead, only inform the controller when it's a trusted authority
29272 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
29273 the rest of bug 1074.
29274 - Fix a bounds-checking error that could allow an attacker to
29275 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
29276 Found by "piebeer".
29277 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
29278 Tor would ignore their RelayBandwidthBurst setting,
29279 potentially using more bandwidth than expected. Bugfix on
29280 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
29281 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
29282 hidserv" in her torrc. The 'hidserv' argument never controlled
29283 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
29286 - Adjust our TLS Diffie-Hellman parameters to match those used by
29288 - Update to the February 1 2011 Maxmind GeoLite Country database.
29291 - Check for and reject overly long directory certificates and
29292 directory tokens before they have a chance to hit any assertions.
29293 Bugfix on 0.2.1.28. Found by "doorss".
29294 - Bring the logic that gathers routerinfos and assesses the
29295 acceptability of circuits into line. This prevents a Tor OP from
29296 getting locked in a cycle of choosing its local OR as an exit for a
29297 path (due to a .exit request) and then rejecting the circuit because
29298 its OR is not listed yet. It also prevents Tor clients from using an
29299 OR running in the same instance as an exit (due to a .exit request)
29300 if the OR does not meet the same requirements expected of an OR
29301 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
29303 o Packaging changes:
29304 - Stop shipping the Tor specs files and development proposal documents
29305 in the tarball. They are now in a separate git repository at
29306 git://git.torproject.org/torspec.git
29307 - Do not include Git version tags as though they are SVN tags when
29308 generating a tarball from inside a repository that has switched
29309 between branches. Bugfix on 0.2.1.15-rc; fixes bug 2402.
29312 Changes in version 0.2.2.22-alpha - 2011-01-25
29313 Tor 0.2.2.22-alpha fixes a few more less-critical security issues. The
29314 main other change is a slight tweak to Tor's TLS handshake that makes
29315 relays and bridges that run this new version reachable from Iran again.
29316 We don't expect this tweak will win the arms race long-term, but it
29317 will buy us a bit more time until we roll out a better solution.
29320 - Fix a bounds-checking error that could allow an attacker to
29321 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
29322 Found by "piebeer".
29323 - Don't assert when changing from bridge to relay or vice versa
29324 via the controller. The assert happened because we didn't properly
29325 initialize our keys in this case. Bugfix on 0.2.2.18-alpha; fixes
29326 bug 2433. Reported by bastik.
29329 - Adjust our TLS Diffie-Hellman parameters to match those used by
29331 - Provide a log message stating which geoip file we're parsing
29332 instead of just stating that we're parsing the geoip file.
29333 Implements ticket 2432.
29336 - Check for and reject overly long directory certificates and
29337 directory tokens before they have a chance to hit any assertions.
29338 Bugfix on 0.2.1.28 / 0.2.2.20-alpha. Found by "doorss".
29341 Changes in version 0.2.2.21-alpha - 2011-01-15
29342 Tor 0.2.2.21-alpha includes all the patches from Tor 0.2.1.29, which
29343 continues our recent code security audit work. The main fix resolves
29344 a remote heap overflow vulnerability that can allow remote code
29345 execution (CVE-2011-0427). Other fixes address a variety of assert
29346 and crash bugs, most of which we think are hard to exploit remotely.
29348 o Major bugfixes (security), also included in 0.2.1.29:
29349 - Fix a heap overflow bug where an adversary could cause heap
29350 corruption. This bug probably allows remote code execution
29351 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
29353 - Prevent a denial-of-service attack by disallowing any
29354 zlib-compressed data whose compression factor is implausibly
29355 high. Fixes part of bug 2324; reported by "doorss".
29356 - Zero out a few more keys in memory before freeing them. Fixes
29357 bug 2384 and part of bug 2385. These key instances found by
29358 "cypherpunks", based on Andrew Case's report about being able
29359 to find sensitive data in Tor's memory space if you have enough
29360 permissions. Bugfix on 0.0.2pre9.
29362 o Major bugfixes (crashes), also included in 0.2.1.29:
29363 - Prevent calls to Libevent from inside Libevent log handlers.
29364 This had potential to cause a nasty set of crashes, especially
29365 if running Libevent with debug logging enabled, and running
29366 Tor with a controller watching for low-severity log messages.
29367 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
29368 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
29369 underflow errors there too. Fixes the other part of bug 2324.
29370 - Fix a bug where we would assert if we ever had a
29371 cached-descriptors.new file (or another file read directly into
29372 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
29373 on 0.2.1.25. Found by doorss.
29374 - Fix some potential asserts and parsing issues with grossly
29375 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
29378 o Minor bugfixes (other), also included in 0.2.1.29:
29379 - Fix a bug with handling misformed replies to reverse DNS lookup
29380 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
29381 bug reported by doorss.
29382 - Fix compilation on mingw when a pthreads compatibility library
29383 has been installed. (We don't want to use it, so we shouldn't
29384 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
29385 - Fix a bug where we would declare that we had run out of virtual
29386 addresses when the address space was only half-exhausted. Bugfix
29388 - Correctly handle the case where AutomapHostsOnResolve is set but
29389 no virtual addresses are available. Fixes bug 2328; bugfix on
29390 0.1.2.1-alpha. Bug found by doorss.
29391 - Correctly handle wrapping around when we run out of virtual
29392 address space. Found by cypherpunks; bugfix on 0.2.0.5-alpha.
29394 o Minor features, also included in 0.2.1.29:
29395 - Update to the January 1 2011 Maxmind GeoLite Country database.
29396 - Introduce output size checks on all of our decryption functions.
29398 o Build changes, also included in 0.2.1.29:
29399 - Tor does not build packages correctly with Automake 1.6 and earlier;
29400 added a check to Makefile.am to make sure that we're building with
29401 Automake 1.7 or later.
29402 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
29403 because we built it with a too-old version of automake. Thus that
29404 release broke ./configure --enable-openbsd-malloc, which is popular
29405 among really fast exit relays on Linux.
29407 o Major bugfixes, new in 0.2.2.21-alpha:
29408 - Prevent crash/heap corruption when the cbtnummodes consensus
29409 parameter is set to 0 or large values. Fixes bug 2317; bugfix
29412 o Major features, new in 0.2.2.21-alpha:
29413 - Introduce minimum/maximum values that clients will believe
29414 from the consensus. Now we'll have a better chance to avoid crashes
29415 or worse when a consensus param has a weird value.
29417 o Minor features, new in 0.2.2.21-alpha:
29418 - Make sure to disable DirPort if running as a bridge. DirPorts aren't
29419 used on bridges, and it makes bridge scanning somewhat easier.
29420 - If writing the state file to disk fails, wait up to an hour before
29421 retrying again, rather than trying again each second. Fixes bug
29422 2346; bugfix on Tor 0.1.1.3-alpha.
29423 - Make Libevent log messages get delivered to controllers later,
29424 and not from inside the Libevent log handler. This prevents unsafe
29425 reentrant Libevent calls while still letting the log messages
29427 - Detect platforms that brokenly use a signed size_t, and refuse to
29428 build there. Found and analyzed by doorss and rransom.
29429 - Fix a bunch of compile warnings revealed by mingw with gcc 4.5.
29432 o Minor bugfixes, new in 0.2.2.21-alpha:
29433 - Handle SOCKS messages longer than 128 bytes long correctly, rather
29434 than waiting forever for them to finish. Fixes bug 2330; bugfix
29435 on 0.2.0.16-alpha. Found by doorss.
29436 - Add assertions to check for overflow in arguments to
29437 base32_encode() and base32_decode(); fix a signed-unsigned
29438 comparison there too. These bugs are not actually reachable in Tor,
29439 but it's good to prevent future errors too. Found by doorss.
29440 - Correctly detect failures to create DNS requests when using Libevent
29441 versions before v2. (Before Libevent 2, we used our own evdns
29442 implementation. Its return values for Libevent's evdns_resolve_*()
29443 functions are not consistent with those from Libevent.) Fixes bug
29444 2363; bugfix on 0.2.2.6-alpha. Found by "lodger".
29446 o Documentation, new in 0.2.2.21-alpha:
29447 - Document the default socks host and port (127.0.0.1:9050) for
29451 Changes in version 0.2.1.29 - 2011-01-15
29452 Tor 0.2.1.29 continues our recent code security audit work. The main
29453 fix resolves a remote heap overflow vulnerability that can allow remote
29454 code execution. Other fixes address a variety of assert and crash bugs,
29455 most of which we think are hard to exploit remotely.
29457 o Major bugfixes (security):
29458 - Fix a heap overflow bug where an adversary could cause heap
29459 corruption. This bug probably allows remote code execution
29460 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
29462 - Prevent a denial-of-service attack by disallowing any
29463 zlib-compressed data whose compression factor is implausibly
29464 high. Fixes part of bug 2324; reported by "doorss".
29465 - Zero out a few more keys in memory before freeing them. Fixes
29466 bug 2384 and part of bug 2385. These key instances found by
29467 "cypherpunks", based on Andrew Case's report about being able
29468 to find sensitive data in Tor's memory space if you have enough
29469 permissions. Bugfix on 0.0.2pre9.
29471 o Major bugfixes (crashes):
29472 - Prevent calls to Libevent from inside Libevent log handlers.
29473 This had potential to cause a nasty set of crashes, especially
29474 if running Libevent with debug logging enabled, and running
29475 Tor with a controller watching for low-severity log messages.
29476 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
29477 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
29478 underflow errors there too. Fixes the other part of bug 2324.
29479 - Fix a bug where we would assert if we ever had a
29480 cached-descriptors.new file (or another file read directly into
29481 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
29482 on 0.2.1.25. Found by doorss.
29483 - Fix some potential asserts and parsing issues with grossly
29484 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
29487 o Minor bugfixes (other):
29488 - Fix a bug with handling misformed replies to reverse DNS lookup
29489 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
29490 bug reported by doorss.
29491 - Fix compilation on mingw when a pthreads compatibility library
29492 has been installed. (We don't want to use it, so we shouldn't
29493 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
29494 - Fix a bug where we would declare that we had run out of virtual
29495 addresses when the address space was only half-exhausted. Bugfix
29497 - Correctly handle the case where AutomapHostsOnResolve is set but
29498 no virtual addresses are available. Fixes bug 2328; bugfix on
29499 0.1.2.1-alpha. Bug found by doorss.
29500 - Correctly handle wrapping around to when we run out of virtual
29501 address space. Found by cypherpunks, bugfix on 0.2.0.5-alpha.
29502 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
29503 because we built it with a too-old version of automake. Thus that
29504 release broke ./configure --enable-openbsd-malloc, which is popular
29505 among really fast exit relays on Linux.
29508 - Update to the January 1 2011 Maxmind GeoLite Country database.
29509 - Introduce output size checks on all of our decryption functions.
29512 - Tor does not build packages correctly with Automake 1.6 and earlier;
29513 added a check to Makefile.am to make sure that we're building with
29514 Automake 1.7 or later.
29517 Changes in version 0.2.2.20-alpha - 2010-12-17
29518 Tor 0.2.2.20-alpha does some code cleanup to reduce the risk of remotely
29519 exploitable bugs. We also fix a variety of other significant bugs,
29520 change the IP address for one of our directory authorities, and update
29521 the minimum version that Tor relays must run to join the network.
29524 - Fix a remotely exploitable bug that could be used to crash instances
29525 of Tor remotely by overflowing on the heap. Remote-code execution
29526 hasn't been confirmed, but can't be ruled out. Everyone should
29527 upgrade. Bugfix on the 0.1.1 series and later.
29528 - Fix a bug that could break accounting on 64-bit systems with large
29529 time_t values, making them hibernate for impossibly long intervals.
29530 Fixes bug 2146. Bugfix on 0.0.9pre6; fix by boboper.
29531 - Fix a logic error in directory_fetches_from_authorities() that
29532 would cause all _non_-exits refusing single-hop-like circuits
29533 to fetch from authorities, when we wanted to have _exits_ fetch
29534 from authorities. Fixes more of 2097. Bugfix on 0.2.2.16-alpha;
29536 - Fix a stream fairness bug that would cause newer streams on a given
29537 circuit to get preference when reading bytes from the origin or
29538 destination. Fixes bug 2210. Fix by Mashael AlSabah. This bug was
29539 introduced before the first Tor release, in svn revision r152.
29541 o Directory authority changes:
29542 - Change IP address and ports for gabelmoo (v3 directory authority).
29545 - Avoid crashes when AccountingMax is set on clients. Fixes bug 2235.
29546 Bugfix on 0.2.2.18-alpha. Diagnosed by boboper.
29547 - Fix an off-by-one error in calculating some controller command
29548 argument lengths. Fortunately, this mistake is harmless since
29549 the controller code does redundant NUL termination too. Found by
29550 boboper. Bugfix on 0.1.1.1-alpha.
29551 - Do not dereference NULL if a bridge fails to build its
29552 extra-info descriptor. Found by an anonymous commenter on
29553 Trac. Bugfix on 0.2.2.19-alpha.
29556 - Update to the December 1 2010 Maxmind GeoLite Country database.
29557 - Directory authorities now reject relays running any versions of
29558 Tor between 0.2.1.3-alpha and 0.2.1.18 inclusive; they have
29559 known bugs that keep RELAY_EARLY cells from working on rendezvous
29560 circuits. Followup to fix for bug 2081.
29561 - Directory authorities now reject relays running any version of Tor
29562 older than 0.2.0.26-rc. That version is the earliest that fetches
29563 current directory information correctly. Fixes bug 2156.
29564 - Report only the top 10 ports in exit-port stats in order not to
29565 exceed the maximum extra-info descriptor length of 50 KB. Implements
29569 Changes in version 0.2.1.28 - 2010-12-17
29570 Tor 0.2.1.28 does some code cleanup to reduce the risk of remotely
29571 exploitable bugs. We also took this opportunity to change the IP address
29572 for one of our directory authorities, and to update the geoip database
29576 - Fix a remotely exploitable bug that could be used to crash instances
29577 of Tor remotely by overflowing on the heap. Remote-code execution
29578 hasn't been confirmed, but can't be ruled out. Everyone should
29579 upgrade. Bugfix on the 0.1.1 series and later.
29581 o Directory authority changes:
29582 - Change IP address and ports for gabelmoo (v3 directory authority).
29585 - Update to the December 1 2010 Maxmind GeoLite Country database.
29588 Changes in version 0.2.1.27 - 2010-11-23
29589 Yet another OpenSSL security patch broke its compatibility with Tor:
29590 Tor 0.2.1.27 makes relays work with openssl 0.9.8p and 1.0.0.b. We
29591 also took this opportunity to fix several crash bugs, integrate a new
29592 directory authority, and update the bundled GeoIP database.
29595 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
29596 No longer set the tlsext_host_name extension on server SSL objects;
29597 but continue to set it on client SSL objects. Our goal in setting
29598 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
29599 bugfix on 0.2.1.1-alpha.
29600 - Do not log messages to the controller while shrinking buffer
29601 freelists. Doing so would sometimes make the controller connection
29602 try to allocate a buffer chunk, which would mess up the internals
29603 of the freelist and cause an assertion failure. Fixes bug 1125;
29604 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
29605 - Learn our external IP address when we're a relay or bridge, even if
29606 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
29607 where we introduced bridge relays that don't need to publish to
29608 be useful. Fixes bug 2050.
29609 - Do even more to reject (and not just ignore) annotations on
29610 router descriptors received anywhere but from the cache. Previously
29611 we would ignore such annotations at first, but cache them to disk
29612 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
29613 - When you're using bridges and your network goes away and your
29614 bridges get marked as down, recover when you attempt a new socks
29615 connection (if the network is back), rather than waiting up to an
29616 hour to try fetching new descriptors for your bridges. Bugfix on
29617 0.2.0.3-alpha; fixes bug 1981.
29620 - Move to the November 2010 Maxmind GeoLite country db (rather
29621 than the June 2009 ip-to-country GeoIP db) for our statistics that
29622 count how many users relays are seeing from each country. Now we'll
29623 have more accurate data, especially for many African countries.
29625 o New directory authorities:
29626 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
29630 - Fix an assertion failure that could occur in directory caches or
29631 bridge users when using a very short voting interval on a testing
29632 network. Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on
29634 - Enforce multiplicity rules when parsing annotations. Bugfix on
29635 0.2.0.8-alpha. Found by piebeer.
29636 - Allow handshaking OR connections to take a full KeepalivePeriod
29637 seconds to handshake. Previously, we would close them after
29638 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
29639 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
29641 - When building with --enable-gcc-warnings on OpenBSD, disable
29642 warnings in system headers. This makes --enable-gcc-warnings
29643 pass on OpenBSD 4.8.
29646 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
29647 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
29648 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
29649 Servers can start sending this code when enough clients recognize
29650 it. Bugfix on 0.1.0.1-rc; fixes part of bug 1793.
29651 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
29652 Patch from mingw-san.
29655 - Remove the old debian/ directory from the main Tor distribution.
29656 The official Tor-for-debian git repository lives at the URL
29657 https://git.torproject.org/debian/tor.git
29658 - Stop shipping the old doc/website/ directory in the tarball. We
29659 changed the website format in late 2010, and what we shipped in
29660 0.2.1.26 really wasn't that useful anyway.
29663 Changes in version 0.2.2.19-alpha - 2010-11-22
29664 Yet another OpenSSL security patch broke its compatibility with Tor:
29665 Tor 0.2.2.19-alpha makes relays work with OpenSSL 0.9.8p and 1.0.0.b.
29668 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
29669 No longer set the tlsext_host_name extension on server SSL objects;
29670 but continue to set it on client SSL objects. Our goal in setting
29671 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
29672 bugfix on 0.2.1.1-alpha.
29675 - Try harder not to exceed the maximum length of 50 KB when writing
29676 statistics to extra-info descriptors. This bug was triggered by very
29677 fast relays reporting exit-port, entry, and dirreq statistics.
29678 Reported by Olaf Selke. Bugfix on 0.2.2.1-alpha. Fixes bug 2183.
29679 - Publish a router descriptor even if generating an extra-info
29680 descriptor fails. Previously we would not publish a router
29681 descriptor without an extra-info descriptor; this can cause fast
29682 exit relays collecting exit-port statistics to drop from the
29683 consensus. Bugfix on 0.1.2.9-rc; fixes bug 2195.
29686 Changes in version 0.2.2.18-alpha - 2010-11-16
29687 Tor 0.2.2.18-alpha fixes several crash bugs that have been nagging
29688 us lately, makes unpublished bridge relays able to detect their IP
29689 address, and fixes a wide variety of other bugs to get us much closer
29690 to a stable release.
29693 - Do even more to reject (and not just ignore) annotations on
29694 router descriptors received anywhere but from the cache. Previously
29695 we would ignore such annotations at first, but cache them to disk
29696 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
29697 - Do not log messages to the controller while shrinking buffer
29698 freelists. Doing so would sometimes make the controller connection
29699 try to allocate a buffer chunk, which would mess up the internals
29700 of the freelist and cause an assertion failure. Fixes bug 1125;
29701 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
29702 - Learn our external IP address when we're a relay or bridge, even if
29703 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
29704 where we introduced bridge relays that don't need to publish to
29705 be useful. Fixes bug 2050.
29706 - Maintain separate TLS contexts and certificates for incoming and
29707 outgoing connections in bridge relays. Previously we would use the
29708 same TLS contexts and certs for incoming and outgoing connections.
29709 Bugfix on 0.2.0.3-alpha; addresses bug 988.
29710 - Maintain separate identity keys for incoming and outgoing TLS
29711 contexts in bridge relays. Previously we would use the same
29712 identity keys for incoming and outgoing TLS contexts. Bugfix on
29713 0.2.0.3-alpha; addresses the other half of bug 988.
29714 - Avoid an assertion failure when we as an authority receive a
29715 duplicate upload of a router descriptor that we already have,
29716 but which we previously considered an obsolete descriptor.
29717 Fixes another case of bug 1776. Bugfix on 0.2.2.16-alpha.
29718 - Avoid a crash bug triggered by looking at a dangling pointer while
29719 setting the network status consensus. Found by Robert Ransom.
29720 Bugfix on 0.2.2.17-alpha. Fixes bug 2097.
29721 - Fix a logic error where servers that _didn't_ act as exits would
29722 try to keep their server lists more aggressively up to date than
29723 exits, when it was supposed to be the other way around. Bugfix
29726 o Minor bugfixes (on Tor 0.2.1.x and earlier):
29727 - When we're trying to guess whether we know our IP address as
29728 a relay, we would log various ways that we failed to guess
29729 our address, but never log that we ended up guessing it
29730 successfully. Now add a log line to help confused and anxious
29731 relay operators. Bugfix on 0.1.2.1-alpha; fixes bug 1534.
29732 - Bring the logic that gathers routerinfos and assesses the
29733 acceptability of circuits into line. This prevents a Tor OP from
29734 getting locked in a cycle of choosing its local OR as an exit for a
29735 path (due to a .exit request) and then rejecting the circuit because
29736 its OR is not listed yet. It also prevents Tor clients from using an
29737 OR running in the same instance as an exit (due to a .exit request)
29738 if the OR does not meet the same requirements expected of an OR
29739 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
29740 - Correctly describe errors that occur when generating a TLS object.
29741 Previously we would attribute them to a failure while generating a
29742 TLS context. Patch by Robert Ransom. Bugfix on 0.1.0.4-rc; fixes
29744 - Enforce multiplicity rules when parsing annotations. Bugfix on
29745 0.2.0.8-alpha. Found by piebeer.
29746 - Fix warnings that newer versions of autoconf produced during
29747 ./autogen.sh. These warnings appear to be harmless in our case,
29748 but they were extremely verbose. Fixes bug 2020.
29750 o Minor bugfixes (on Tor 0.2.2.x):
29751 - Enable protection of small arrays whenever we build with gcc
29752 hardening features, not only when also building with warnings
29753 enabled. Fixes bug 2031; bugfix on 0.2.2.14-alpha. Reported by keb.
29756 - Make hidden services work better in private Tor networks by not
29757 requiring any uptime to join the hidden service descriptor
29758 DHT. Implements ticket 2088.
29759 - Rate-limit the "your application is giving Tor only an IP address"
29760 warning. Addresses bug 2000; bugfix on 0.0.8pre2.
29761 - When AllowSingleHopExits is set, print a warning to explain to the
29762 relay operator why most clients are avoiding her relay.
29763 - Update to the November 1 2010 Maxmind GeoLite Country database.
29765 o Code simplifications and refactoring:
29766 - When we fixed bug 1038 we had to put in a restriction not to send
29767 RELAY_EARLY cells on rend circuits. This was necessary as long
29768 as relays using Tor 0.2.1.3-alpha through 0.2.1.18-alpha were
29769 active. Now remove this obsolete check. Resolves bug 2081.
29770 - Some options used different conventions for uppercasing of acronyms
29771 when comparing manpage and source. Fix those in favor of the
29772 manpage, as it makes sense to capitalize acronyms.
29773 - Remove the torrc.complete file. It hasn't been kept up to date
29774 and users will have better luck checking out the manpage.
29775 - Remove the obsolete "NoPublish" option; it has been flagged
29776 as obsolete and has produced a warning since 0.1.1.18-rc.
29777 - Remove everything related to building the expert bundle for OS X.
29778 It has confused many users, doesn't work right on OS X 10.6,
29779 and is hard to get rid of once installed. Resolves bug 1274.
29782 Changes in version 0.2.2.17-alpha - 2010-09-30
29783 Tor 0.2.2.17-alpha introduces a feature to make it harder for clients
29784 to use one-hop circuits (which can put the exit relays at higher risk,
29785 plus unbalance the network); fixes a big bug in bandwidth accounting
29786 for relays that want to limit their monthly bandwidth use; fixes a
29787 big pile of bugs in how clients tolerate temporary network failure;
29788 and makes our adaptive circuit build timeout feature (which improves
29789 client performance if your network is fast while not breaking things
29790 if your network is slow) better handle bad networks.
29793 - Exit relays now try harder to block exit attempts from unknown
29794 relays, to make it harder for people to use them as one-hop proxies
29795 a la tortunnel. Controlled by the refuseunknownexits consensus
29796 parameter (currently enabled), or you can override it on your
29797 relay with the RefuseUnknownExits torrc option. Resolves bug 1751.
29799 o Major bugfixes (0.2.1.x and earlier):
29800 - Fix a bug in bandwidth accounting that could make us use twice
29801 the intended bandwidth when our interval start changes due to
29802 daylight saving time. Now we tolerate skew in stored vs computed
29803 interval starts: if the start of the period changes by no more than
29804 50% of the period's duration, we remember bytes that we transferred
29805 in the old period. Fixes bug 1511; bugfix on 0.0.9pre5.
29806 - Always search the Windows system directory for system DLLs, and
29807 nowhere else. Bugfix on 0.1.1.23; fixes bug 1954.
29808 - When you're using bridges and your network goes away and your
29809 bridges get marked as down, recover when you attempt a new socks
29810 connection (if the network is back), rather than waiting up to an
29811 hour to try fetching new descriptors for your bridges. Bugfix on
29812 0.2.0.3-alpha; fixes bug 1981.
29814 o Major bugfixes (on 0.2.2.x):
29815 - Fix compilation on Windows. Bugfix on 0.2.2.16-alpha; related to
29817 - Fix a segfault that could happen when operating a bridge relay with
29818 no GeoIP database set. Fixes bug 1964; bugfix on 0.2.2.15-alpha.
29819 - The consensus bandwidth-weights (used by clients to choose fast
29820 relays) entered an unexpected edge case in September where
29821 Exits were much scarcer than Guards, resulting in bad weight
29822 recommendations. Now we compute them using new constraints that
29823 should succeed in all cases. Also alter directory authorities to
29824 not include the bandwidth-weights line if they fail to produce
29825 valid values. Fixes bug 1952; bugfix on 0.2.2.10-alpha.
29826 - When weighting bridges during path selection, we used to trust
29827 the bandwidths they provided in their descriptor, only capping them
29828 at 10MB/s. This turned out to be problematic for two reasons:
29829 Bridges could claim to handle a lot more traffic then they
29830 actually would, thus making more clients pick them and have a
29831 pretty effective DoS attack. The other issue is that new bridges
29832 that might not have a good estimate for their bw capacity yet
29833 would not get used at all unless no other bridges are available
29834 to a client. Fixes bug 1912; bugfix on 0.2.2.7-alpha.
29836 o Major bugfixes (on the circuit build timeout feature, 0.2.2.x):
29837 - Ignore cannibalized circuits when recording circuit build times.
29838 This should provide for a minor performance improvement for hidden
29839 service users using 0.2.2.14-alpha, and should remove two spurious
29840 notice log messages. Bugfix on 0.2.2.14-alpha; fixes bug 1740.
29841 - Simplify the logic that causes us to decide if the network is
29842 unavailable for purposes of recording circuit build times. If we
29843 receive no cells whatsoever for the entire duration of a circuit's
29844 full measured lifetime, the network is probably down. Also ignore
29845 one-hop directory fetching circuit timeouts when calculating our
29846 circuit build times. These changes should hopefully reduce the
29847 cases where we see ridiculous circuit build timeouts for people
29848 with spotty wireless connections. Fixes part of bug 1772; bugfix
29850 - Prevent the circuit build timeout from becoming larger than
29851 the maximum build time we have ever seen. Also, prevent the time
29852 period for measurement circuits from becoming larger than twice that
29853 value. Fixes the other part of bug 1772; bugfix on 0.2.2.2-alpha.
29856 - When we run out of directory information such that we can't build
29857 circuits, but then get enough that we can build circuits, log when
29858 we actually construct a circuit, so the user has a better chance of
29859 knowing what's going on. Fixes bug 1362.
29860 - Be more generous with how much bandwidth we'd use up (with
29861 accounting enabled) before entering "soft hibernation". Previously,
29862 we'd refuse new connections and circuits once we'd used up 95% of
29863 our allotment. Now, we use up 95% of our allotment, AND make sure
29864 that we have no more than 500MB (or 3 hours of expected traffic,
29865 whichever is lower) remaining before we enter soft hibernation.
29866 - If we've configured EntryNodes and our network goes away and/or all
29867 our entrynodes get marked down, optimistically retry them all when
29868 a new socks application request appears. Fixes bug 1882.
29869 - Add some more defensive programming for architectures that can't
29870 handle unaligned integer accesses. We don't know of any actual bugs
29871 right now, but that's the best time to fix them. Fixes bug 1943.
29872 - Support line continuations in the torrc config file. If a line
29873 ends with a single backslash character, the newline is ignored, and
29874 the configuration value is treated as continuing on the next line.
29877 o Minor bugfixes (on 0.2.1.x and earlier):
29878 - For bandwidth accounting, calculate our expected bandwidth rate
29879 based on the time during which we were active and not in
29880 soft-hibernation during the last interval. Previously, we were
29881 also considering the time spent in soft-hibernation. If this
29882 was a long time, we would wind up underestimating our bandwidth
29883 by a lot, and skewing our wakeup time towards the start of the
29884 accounting interval. Fixes bug 1789. Bugfix on 0.0.9pre5.
29886 o Minor bugfixes (on 0.2.2.x):
29887 - Resume generating CIRC FAILED REASON=TIMEOUT control port messages,
29888 which were disabled by the circuit build timeout changes in
29889 0.2.2.14-alpha. Bugfix on 0.2.2.14-alpha; fixes bug 1739.
29890 - Make sure we don't warn about missing bandwidth weights when
29891 choosing bridges or other relays not in the consensus. Bugfix on
29892 0.2.2.10-alpha; fixes bug 1805.
29893 - In our logs, do not double-report signatures from unrecognized
29894 authorities both as "from unknown authority" and "not
29895 present". Fixes bug 1956, bugfix on 0.2.2.16-alpha.
29898 Changes in version 0.2.2.16-alpha - 2010-09-17
29899 Tor 0.2.2.16-alpha fixes a variety of old stream fairness bugs (most
29900 evident at exit relays), and also continues to resolve all the little
29901 bugs that have been filling up trac lately.
29903 o Major bugfixes (stream-level fairness):
29904 - When receiving a circuit-level SENDME for a blocked circuit, try
29905 to package cells fairly from all the streams that had previously
29906 been blocked on that circuit. Previously, we had started with the
29907 oldest stream, and allowed each stream to potentially exhaust
29908 the circuit's package window. This gave older streams on any
29909 given circuit priority over newer ones. Fixes bug 1937. Detected
29910 originally by Camilo Viecco. This bug was introduced before the
29911 first Tor release, in svn commit r152: it is the new winner of
29912 the longest-lived bug prize.
29913 - When the exit relay got a circuit-level sendme cell, it started
29914 reading on the exit streams, even if had 500 cells queued in the
29915 circuit queue already, so the circuit queue just grew and grew in
29916 some cases. We fix this by not re-enabling reading on receipt of a
29917 sendme cell when the cell queue is blocked. Fixes bug 1653. Bugfix
29918 on 0.2.0.1-alpha. Detected by Mashael AlSabah. Original patch by
29920 - Newly created streams were allowed to read cells onto circuits,
29921 even if the circuit's cell queue was blocked and waiting to drain.
29922 This created potential unfairness, as older streams would be
29923 blocked, but newer streams would gladly fill the queue completely.
29924 We add code to detect this situation and prevent any stream from
29925 getting more than one free cell. Bugfix on 0.2.0.1-alpha. Partially
29929 - Update to the September 1 2010 Maxmind GeoLite Country database.
29930 - Warn when CookieAuthFileGroupReadable is set but CookieAuthFile is
29931 not. This would lead to a cookie that is still not group readable.
29932 Closes bug 1843. Suggested by katmagic.
29933 - When logging a rate-limited warning, we now mention how many messages
29934 got suppressed since the last warning.
29935 - Add new "perconnbwrate" and "perconnbwburst" consensus params to
29936 do individual connection-level rate limiting of clients. The torrc
29937 config options with the same names trump the consensus params, if
29938 both are present. Replaces the old "bwconnrate" and "bwconnburst"
29939 consensus params which were broken from 0.2.2.7-alpha through
29940 0.2.2.14-alpha. Closes bug 1947.
29941 - When a router changes IP address or port, authorities now launch
29942 a new reachability test for it. Implements ticket 1899.
29943 - Make the formerly ugly "2 unknown, 7 missing key, 0 good, 0 bad,
29944 2 no signature, 4 required" messages about consensus signatures
29945 easier to read, and make sure they get logged at the same severity
29946 as the messages explaining which keys are which. Fixes bug 1290.
29947 - Don't warn when we have a consensus that we can't verify because
29948 of missing certificates, unless those certificates are ones
29949 that we have been trying and failing to download. Fixes bug 1145.
29950 - If you configure your bridge with a known identity fingerprint,
29951 and the bridge authority is unreachable (as it is in at least
29952 one country now), fall back to directly requesting the descriptor
29953 from the bridge. Finishes the feature started in 0.2.0.10-alpha;
29955 - When building with --enable-gcc-warnings on OpenBSD, disable
29956 warnings in system headers. This makes --enable-gcc-warnings
29957 pass on OpenBSD 4.8.
29959 o Minor bugfixes (on 0.2.1.x and earlier):
29960 - Authorities will now attempt to download consensuses if their
29961 own efforts to make a live consensus have failed. This change
29962 means authorities that restart will fetch a valid consensus, and
29963 it means authorities that didn't agree with the current consensus
29964 will still fetch and serve it if it has enough signatures. Bugfix
29965 on 0.2.0.9-alpha; fixes bug 1300.
29966 - Ensure DNS requests launched by "RESOLVE" commands from the
29967 controller respect the __LeaveStreamsUnattached setconf options. The
29968 same goes for requests launched via DNSPort or transparent
29969 proxying. Bugfix on 0.2.0.1-alpha; fixes bug 1525.
29970 - Allow handshaking OR connections to take a full KeepalivePeriod
29971 seconds to handshake. Previously, we would close them after
29972 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
29973 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
29975 - Rate-limit "Failed to hand off onionskin" warnings.
29976 - Never relay a cell for a circuit we have already destroyed.
29977 Between marking a circuit as closeable and finally closing it,
29978 it may have been possible for a few queued cells to get relayed,
29979 even though they would have been immediately dropped by the next
29980 OR in the circuit. Fixes bug 1184; bugfix on 0.2.0.1-alpha.
29981 - Never queue a cell for a circuit that's already been marked
29983 - Never vote for a server as "Running" if we have a descriptor for
29984 it claiming to be hibernating, and that descriptor was published
29985 more recently than our last contact with the server. Bugfix on
29986 0.2.0.3-alpha; fixes bug 911.
29987 - Squash a compile warning on OpenBSD. Reported by Tas; fixes
29990 o Minor bugfixes (on 0.2.2.x):
29991 - Fix a regression introduced in 0.2.2.7-alpha that marked relays
29992 down if a directory fetch fails and you've configured either
29993 bridges or EntryNodes. The intent was to mark the relay as down
29994 _unless_ you're using bridges or EntryNodes, since if you are
29995 then you could quickly run out of entry points.
29996 - Fix the Windows directory-listing code. A bug introduced in
29997 0.2.2.14-alpha could make Windows directory servers forget to load
29998 some of their cached v2 networkstatus files.
29999 - Really allow clients to use relays as bridges. Fixes bug 1776;
30000 bugfix on 0.2.2.15-alpha.
30001 - Demote a warn to info that happens when the CellStatistics option
30002 was just enabled. Bugfix on 0.2.2.15-alpha; fixes bug 1921.
30003 Reported by Moritz Bartl.
30004 - On Windows, build correctly either with or without Unicode support.
30005 This is necessary so that Tor can support fringe platforms like
30006 Windows 98 (which has no Unicode), or Windows CE (which has no
30007 non-Unicode). Bugfix on 0.2.2.14-alpha; fixes bug 1797.
30010 - Add a unit test for cross-platform directory-listing code.
30013 Changes in version 0.2.2.15-alpha - 2010-08-18
30014 Tor 0.2.2.15-alpha fixes a big bug in hidden service availability,
30015 fixes a variety of other bugs that were preventing performance
30016 experiments from moving forward, fixes several bothersome memory leaks,
30017 and generally closes a lot of smaller bugs that have been filling up
30021 - Stop assigning the HSDir flag to relays that disable their
30022 DirPort (and thus will refuse to answer directory requests). This
30023 fix should dramatically improve the reachability of hidden services:
30024 hidden services and hidden service clients pick six HSDir relays
30025 to store and retrieve the hidden service descriptor, and currently
30026 about half of the HSDir relays will refuse to work. Bugfix on
30027 0.2.0.10-alpha; fixes part of bug 1693.
30028 - The PerConnBWRate and Burst config options, along with the
30029 bwconnrate and bwconnburst consensus params, initialized each conn's
30030 token bucket values only when the connection is established. Now we
30031 update them if the config options change, and update them every time
30032 we get a new consensus. Otherwise we can encounter an ugly edge
30033 case where we initialize an OR conn to client-level bandwidth,
30034 but then later the relay joins the consensus and we leave it
30035 throttled. Bugfix on 0.2.2.7-alpha; fixes bug 1830.
30036 - Fix a regression that caused Tor to rebind its ports if it receives
30037 SIGHUP while hibernating. Bugfix in 0.1.1.6-alpha; closes bug 919.
30040 - Lower the maximum weighted-fractional-uptime cutoff to 98%. This
30041 should give us approximately 40-50% more Guard-flagged nodes,
30042 improving the anonymity the Tor network can provide and also
30043 decreasing the dropoff in throughput that relays experience when
30044 they first get the Guard flag.
30045 - Allow enabling or disabling the *Statistics config options while
30049 - Update to the August 1 2010 Maxmind GeoLite Country database.
30050 - Have the controller interface give a more useful message than
30051 "Internal Error" in response to failed GETINFO requests.
30052 - Warn when the same option is provided more than once in a torrc
30053 file, on the command line, or in a single SETCONF statement, and
30054 the option is one that only accepts a single line. Closes bug 1384.
30055 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
30056 Patch from mingw-san.
30057 - Add support for the country code "{??}" in torrc options like
30058 ExcludeNodes, to indicate all routers of unknown country. Closes
30060 - Relays report the number of bytes spent on answering directory
30061 requests in extra-info descriptors similar to {read,write}-history.
30062 Implements enhancement 1790.
30064 o Minor bugfixes (on 0.2.1.x and earlier):
30065 - Complain if PublishServerDescriptor is given multiple arguments that
30066 include 0 or 1. This configuration will be rejected in the future.
30067 Bugfix on 0.2.0.1-alpha; closes bug 1107.
30068 - Disallow BridgeRelay 1 and ORPort 0 at once in the configuration.
30069 Bugfix on 0.2.0.13-alpha; closes bug 928.
30070 - Change "Application request when we're believed to be offline."
30071 notice to "Application request when we haven't used client
30072 functionality lately.", to clarify that it's not an error. Bugfix
30073 on 0.0.9.3; fixes bug 1222.
30074 - Fix a bug in the controller interface where "GETINFO ns/asdaskljkl"
30075 would return "551 Internal error" rather than "552 Unrecognized key
30076 ns/asdaskljkl". Bugfix on 0.1.2.3-alpha.
30077 - Users can't configure a regular relay to be their bridge. It didn't
30078 work because when Tor fetched the bridge descriptor, it found
30079 that it already had it, and didn't realize that the purpose of the
30080 descriptor had changed. Now we replace routers with a purpose other
30081 than bridge with bridge descriptors when fetching them. Bugfix on
30082 0.1.1.9-alpha. Bug 1776 not yet fixed because now we immediately
30083 refetch the descriptor with router purpose 'general', disabling
30085 - Fix a rare bug in rend_fn unit tests: we would fail a test when
30086 a randomly generated port is 0. Diagnosed by Matt Edman. Bugfix
30087 on 0.2.0.10-alpha; fixes bug 1808.
30088 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
30089 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
30090 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
30091 Servers can start sending this code when enough clients recognize
30092 it. Also update the spec to reflect this new reason. Bugfix on
30093 0.1.0.1-rc; fixes part of bug 1793.
30094 - Delay geoip stats collection by bridges for 6 hours, not 2 hours,
30095 when we switch from being a public relay to a bridge. Otherwise
30096 there will still be clients that see the relay in their consensus,
30097 and the stats will end up wrong. Bugfix on 0.2.1.15-rc; fixes bug
30099 - Instead of giving an assertion failure on an internal mismatch
30100 on estimated freelist size, just log a BUG warning and try later.
30101 Mitigates but does not fix bug 1125.
30102 - Fix an assertion failure that could occur in caches or bridge users
30103 when using a very short voting interval on a testing network.
30104 Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on 0.2.0.8-alpha.
30106 o Minor bugfixes (on 0.2.2.x):
30107 - Alter directory authorities to always consider Exit-flagged nodes
30108 as potential Guard nodes in their votes. The actual decision to
30109 use Exits as Guards is done in the consensus bandwidth weights.
30110 Fixes bug 1294; bugfix on 0.2.2.10-alpha.
30111 - When the controller is reporting the purpose of circuits that
30112 didn't finish building before the circuit build timeout, it was
30113 printing UNKNOWN_13. Now print EXPIRED. Bugfix on 0.2.2.14-alpha.
30114 - Our libevent version parsing code couldn't handle versions like
30115 1.4.14b-stable and incorrectly warned the user about using an
30116 old and broken version of libevent. Treat 1.4.14b-stable like
30117 1.4.14-stable when parsing the version. Fixes bug 1731; bugfix
30119 - Don't use substitution references like $(VAR:MOD) when
30120 $(asciidoc_files) is empty -- make(1) on NetBSD transforms
30121 '$(:x)' to 'x' rather than the empty string. This bites us in
30122 doc/ when configured with --disable-asciidoc. Bugfix on
30123 0.2.2.9-alpha; fixes bug 1773.
30124 - Remove a spurious hidden service server-side log notice about
30125 "Ancient non-dirty circuits". Bugfix on 0.2.2.14-alpha; fixes
30127 - Fix compilation with --with-dmalloc set. Bugfix on 0.2.2.6-alpha;
30129 - Correctly report written bytes on linked connections. Found while
30130 implementing 1790. Bugfix on 0.2.2.4-alpha.
30131 - Fix three memory leaks: one in circuit_build_times_parse_state(),
30132 one in dirvote_add_signatures_to_pending_consensus(), and one every
30133 time we parse a v3 network consensus. Bugfixes on 0.2.2.14-alpha,
30134 0.2.2.6-alpha, and 0.2.2.10-alpha respectively; fixes bug 1831.
30136 o Code simplifications and refactoring:
30137 - Take a first step towards making or.h smaller by splitting out
30138 function definitions for all source files in src/or/. Leave
30139 structures and defines in or.h for now.
30140 - Remove a bunch of unused function declarations as well as a block of
30141 #if 0'd code from the unit tests. Closes bug 1824.
30142 - New unit tests for exit-port history statistics; refactored exit
30143 statistics code to be more easily tested.
30144 - Remove the old debian/ directory from the main Tor distribution.
30145 The official Tor-for-debian git repository lives at the URL
30146 https://git.torproject.org/debian/tor.git
30149 Changes in version 0.2.2.14-alpha - 2010-07-12
30150 Tor 0.2.2.14-alpha greatly improves client-side handling of
30151 circuit build timeouts, which are used to estimate speed and improve
30152 performance. We also move to a much better GeoIP database, port Tor to
30153 Windows CE, introduce new compile flags that improve code security,
30154 add an eighth v3 directory authority, and address a lot of more
30158 - Tor directory authorities no longer crash when started with a
30159 cached-microdesc-consensus file in their data directory. Bugfix
30160 on 0.2.2.6-alpha; fixes bug 1532.
30161 - Treat an unset $HOME like an empty $HOME rather than triggering an
30162 assert. Bugfix on 0.0.8pre1; fixes bug 1522.
30163 - Ignore negative and large circuit build timeout values that can
30164 happen during a suspend or hibernate. These values caused various
30165 asserts to fire. Bugfix on 0.2.2.2-alpha; fixes bug 1245.
30166 - Alter calculation of Pareto distribution parameter 'Xm' for
30167 Circuit Build Timeout learning to use the weighted average of the
30168 top N=3 modes (because we have three entry guards). Considering
30169 multiple modes should improve the timeout calculation in some cases,
30170 and prevent extremely high timeout values. Bugfix on 0.2.2.2-alpha;
30172 - Alter calculation of Pareto distribution parameter 'Alpha' to use a
30173 right censored distribution model. This approach improves over the
30174 synthetic timeout generation approach that was producing insanely
30175 high timeout values. Now we calculate build timeouts using truncated
30176 times. Bugfix on 0.2.2.2-alpha; fixes bugs 1245 and 1335.
30177 - Do not close circuits that are under construction when they reach
30178 the circuit build timeout. Instead, leave them building (but do not
30179 use them) for up until the time corresponding to the 95th percentile
30180 on the Pareto CDF or 60 seconds, whichever is greater. This is done
30181 to provide better data for the new Pareto model. This percentile
30182 can be controlled by the consensus.
30185 - Move to the June 2010 Maxmind GeoLite country db (rather than the
30186 June 2009 ip-to-country GeoIP db) for our statistics that count
30187 how many users relays are seeing from each country. Now we have
30188 more accurate data for many African countries.
30189 - Port Tor to build and run correctly on Windows CE systems, using
30190 the wcecompat library. Contributed by Valerio Lupi.
30191 - New "--enable-gcc-hardening" ./configure flag (off by default)
30192 to turn on gcc compile time hardening options. It ensures
30193 that signed ints have defined behavior (-fwrapv), enables
30194 -D_FORTIFY_SOURCE=2 (requiring -O2), adds stack smashing protection
30195 with canaries (-fstack-protector-all), turns on ASLR protection if
30196 supported by the kernel (-fPIE, -pie), and adds additional security
30197 related warnings. Verified to work on Mac OS X and Debian Lenny.
30198 - New "--enable-linker-hardening" ./configure flag (off by default)
30199 to turn on ELF specific hardening features (relro, now). This does
30200 not work with Mac OS X or any other non-ELF binary format.
30202 o New directory authorities:
30203 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
30207 - New config option "WarnUnsafeSocks 0" disables the warning that
30208 occurs whenever Tor receives a socks handshake using a version of
30209 the socks protocol that can only provide an IP address (rather
30210 than a hostname). Setups that do DNS locally over Tor are fine,
30211 and we shouldn't spam the logs in that case.
30212 - Convert the HACKING file to asciidoc, and add a few new sections
30213 to it, explaining how we use Git, how we make changelogs, and
30214 what should go in a patch.
30215 - Add a TIMEOUT_RATE keyword to the BUILDTIMEOUT_SET control port
30216 event, to give information on the current rate of circuit timeouts
30217 over our stored history.
30218 - Add ability to disable circuit build time learning via consensus
30219 parameter and via a LearnCircuitBuildTimeout config option. Also
30220 automatically disable circuit build time calculation if we are
30221 either a AuthoritativeDirectory, or if we fail to write our state
30222 file. Fixes bug 1296.
30223 - More gracefully handle corrupt state files, removing asserts
30224 in favor of saving a backup and resetting state.
30225 - Rename the "log.h" header to "torlog.h" so as to conflict with fewer
30229 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
30231 - When a2x fails, mention that the user could disable manpages instead
30232 of trying to fix their asciidoc installation.
30233 - Where available, use Libevent 2.0's periodic timers so that our
30234 once-per-second cleanup code gets called even more closely to
30235 once per second than it would otherwise. Fixes bug 943.
30236 - If you run a bridge that listens on multiple IP addresses, and
30237 some user configures a bridge address that uses a different IP
30238 address than your bridge writes in its router descriptor, and the
30239 user doesn't specify an identity key, their Tor would discard the
30240 descriptor because "it isn't one of our configured bridges", and
30241 fail to bootstrap. Now believe the descriptor and bootstrap anyway.
30242 Bugfix on 0.2.0.3-alpha.
30243 - If OpenSSL fails to make a duplicate of a private or public key, log
30244 an error message and try to exit cleanly. May help with debugging
30245 if bug 1209 ever remanifests.
30246 - Save a couple bytes in memory allocation every time we escape
30247 certain characters in a string. Patch from Florian Zumbiehl.
30248 - Make it explicit that we don't cannibalize one-hop circuits. This
30249 happens in the wild, but doesn't turn out to be a problem because
30250 we fortunately don't use those circuits. Many thanks to outofwords
30251 for the initial analysis and to swissknife who confirmed that
30252 two-hop circuits are actually created.
30253 - Make directory mirrors report non-zero dirreq-v[23]-shares again.
30254 Fixes bug 1564; bugfix on 0.2.2.9-alpha.
30255 - Eliminate a case where a circuit build time warning was displayed
30256 after network connectivity resumed. Bugfix on 0.2.2.2-alpha.
30259 Changes in version 0.2.1.26 - 2010-05-02
30260 Tor 0.2.1.26 addresses the recent connection and memory overload
30261 problems we've been seeing on relays, especially relays with their
30262 DirPort open. If your relay has been crashing, or you turned it off
30263 because it used too many resources, give this release a try.
30265 This release also fixes yet another instance of broken OpenSSL libraries
30266 that was causing some relays to drop out of the consensus.
30269 - Teach relays to defend themselves from connection overload. Relays
30270 now close idle circuits early if it looks like they were intended
30271 for directory fetches. Relays are also more aggressive about closing
30272 TLS connections that have no circuits on them. Such circuits are
30273 unlikely to be re-used, and tens of thousands of them were piling
30274 up at the fast relays, causing the relays to run out of sockets
30275 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
30276 their directory fetches over TLS).
30277 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
30278 that claim to be earlier than 0.9.8m, but which have in reality
30279 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
30280 behavior. Possible fix for some cases of bug 1346.
30281 - Directory mirrors were fetching relay descriptors only from v2
30282 directory authorities, rather than v3 authorities like they should.
30283 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
30284 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
30287 - Finally get rid of the deprecated and now harmful notion of "clique
30288 mode", where directory authorities maintain TLS connections to
30292 - In the util/threads test, no longer free the test_mutex before all
30293 worker threads have finished. Bugfix on 0.2.1.6-alpha.
30294 - The master thread could starve the worker threads quite badly on
30295 certain systems, causing them to run only partially in the allowed
30296 window. This resulted in test failures. Now the master thread sleeps
30297 occasionally for a few microseconds while the two worker-threads
30298 compete for the mutex. Bugfix on 0.2.0.1-alpha.
30301 Changes in version 0.2.2.13-alpha - 2010-04-24
30302 Tor 0.2.2.13-alpha addresses the recent connection and memory overload
30303 problems we've been seeing on relays, especially relays with their
30304 DirPort open. If your relay has been crashing, or you turned it off
30305 because it used too many resources, give this release a try.
30308 - Teach relays to defend themselves from connection overload. Relays
30309 now close idle circuits early if it looks like they were intended
30310 for directory fetches. Relays are also more aggressive about closing
30311 TLS connections that have no circuits on them. Such circuits are
30312 unlikely to be re-used, and tens of thousands of them were piling
30313 up at the fast relays, causing the relays to run out of sockets
30314 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
30315 their directory fetches over TLS).
30318 - Finally get rid of the deprecated and now harmful notion of "clique
30319 mode", where directory authorities maintain TLS connections to
30321 - Directory authorities now do an immediate reachability check as soon
30322 as they hear about a new relay. This change should slightly reduce
30323 the time between setting up a relay and getting listed as running
30324 in the consensus. It should also improve the time between setting
30325 up a bridge and seeing use by bridge users.
30326 - Directory authorities no longer launch a TLS connection to every
30327 relay as they startup. Now that we have 2k+ descriptors cached,
30328 the resulting network hiccup is becoming a burden. Besides,
30329 authorities already avoid voting about Running for the first half
30330 hour of their uptime.
30333 Changes in version 0.2.2.12-alpha - 2010-04-20
30334 Tor 0.2.2.12-alpha fixes a critical bug in how directory authorities
30335 handle and vote on descriptors. It was causing relays to drop out of
30339 - Many relays have been falling out of the consensus lately because
30340 not enough authorities know about their descriptor for them to get
30341 a majority of votes. When we deprecated the v2 directory protocol,
30342 we got rid of the only way that v3 authorities can hear from each
30343 other about other descriptors. Now authorities examine every v3
30344 vote for new descriptors, and fetch them from that authority. Bugfix
30346 - Fix two typos in tor_vasprintf() that broke the compile on Windows,
30347 and a warning in or.h related to bandwidth_weight_rule_t that
30348 prevented clean compile on OS X. Fixes bug 1363; bugfix on
30350 - Fix a segfault on relays when DirReqStatistics is enabled
30351 and 24 hours pass. Bug found by keb. Fixes bug 1365; bugfix on
30355 - Demote a confusing TLS warning that relay operators might get when
30356 someone tries to talk to their OrPort. It is neither the operator's
30357 fault nor can they do anything about it. Fixes bug 1364; bugfix
30361 Changes in version 0.2.2.11-alpha - 2010-04-15
30362 Tor 0.2.2.11-alpha fixes yet another instance of broken OpenSSL
30363 libraries that was causing some relays to drop out of the consensus.
30366 - Directory mirrors were fetching relay descriptors only from v2
30367 directory authorities, rather than v3 authorities like they should.
30368 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
30369 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
30370 - Fix a parsing error that made every possible value of
30371 CircPriorityHalflifeMsec get treated as "1 msec". Bugfix
30372 on 0.2.2.7-alpha. Rename CircPriorityHalflifeMsec to
30373 CircuitPriorityHalflifeMsec, so authorities can tell newer relays
30374 about the option without breaking older ones.
30375 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
30376 that claim to be earlier than 0.9.8m, but which have in reality
30377 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
30378 behavior. Possible fix for some cases of bug 1346.
30381 - Experiment with a more aggressive approach to preventing clients
30382 from making one-hop exit streams. Exit relays who want to try it
30383 out can set "RefuseUnknownExits 1" in their torrc, and then look
30384 for "Attempt by %s to open a stream" log messages. Let us know
30386 - Add support for statically linking zlib by specifying
30387 --enable-static-zlib, to go with our support for statically linking
30388 openssl and libevent. Resolves bug 1358.
30391 - Fix a segfault that happens whenever a Tor client that is using
30392 libevent2's bufferevents gets a hup signal. Bugfix on 0.2.2.5-alpha;
30394 - When we cleaned up the contrib/tor-exit-notice.html file, we left
30395 out the first line. Fixes bug 1295.
30396 - When building the manpage from a tarball, we required asciidoc, but
30397 the asciidoc -> roff/html conversion was already done for the
30398 tarball. Make 'make' complain only when we need asciidoc (either
30399 because we're compiling directly from git, or because we altered
30400 the asciidoc manpage in the tarball). Bugfix on 0.2.2.9-alpha.
30401 - When none of the directory authorities vote on any params, Tor
30402 segfaulted when trying to make the consensus from the votes. We
30403 didn't trigger the bug in practice, because authorities do include
30404 params in their votes. Bugfix on 0.2.2.10-alpha; fixes bug 1322.
30407 - In the util/threads test, no longer free the test_mutex before all
30408 worker threads have finished. Bugfix on 0.2.1.6-alpha.
30409 - The master thread could starve the worker threads quite badly on
30410 certain systems, causing them to run only partially in the allowed
30411 window. This resulted in test failures. Now the master thread sleeps
30412 occasionally for a few microseconds while the two worker-threads
30413 compete for the mutex. Bugfix on 0.2.0.1-alpha.
30416 Changes in version 0.2.2.10-alpha - 2010-03-07
30417 Tor 0.2.2.10-alpha fixes a regression introduced in 0.2.2.9-alpha that
30418 could prevent relays from guessing their IP address correctly. It also
30419 starts the groundwork for another client-side performance boost, since
30420 currently we're not making efficient use of relays that have both the
30421 Guard flag and the Exit flag.
30424 - Fix a regression from our patch for bug 1244 that caused relays
30425 to guess their IP address incorrectly if they didn't set Address
30426 in their torrc and/or their address fails to resolve. Bugfix on
30427 0.2.2.9-alpha; fixes bug 1269.
30429 o Major features (performance):
30430 - Directory authorities now compute consensus weightings that instruct
30431 clients how to weight relays flagged as Guard, Exit, Guard+Exit,
30432 and no flag. Clients that use these weightings will distribute
30433 network load more evenly across these different relay types. The
30434 weightings are in the consensus so we can change them globally in
30435 the future. Extra thanks to "outofwords" for finding some nasty
30436 security bugs in the first implementation of this feature.
30438 o Minor features (performance):
30439 - Always perform router selections using weighted relay bandwidth,
30440 even if we don't need a high capacity circuit at the time. Non-fast
30441 circuits now only differ from fast ones in that they can use relays
30442 not marked with the Fast flag. This "feature" could turn out to
30443 be a horrible bug; we should investigate more before it goes into
30447 - Allow disabling building of the manpages. Skipping the manpage
30448 speeds up the build considerably.
30450 o Minor bugfixes (on 0.2.2.x):
30451 - Fix a memleak in the EXTENDCIRCUIT logic. Spotted by coverity.
30452 Bugfix on 0.2.2.9-alpha.
30453 - Disallow values larger than INT32_MAX for PerConnBWRate|Burst
30454 config option. Bugfix on 0.2.2.7-alpha.
30455 - Ship the asciidoc-helper file in the tarball, so that people can
30456 build from source if they want to, and touching the .1.txt files
30457 doesn't break the build. Bugfix on 0.2.2.9-alpha.
30459 o Minor bugfixes (on 0.2.1.x or earlier):
30460 - Fix a dereference-then-NULL-check sequence when publishing
30461 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
30463 - Fix another dereference-then-NULL-check sequence. Bugfix on
30464 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
30465 - Make sure we treat potentially not NUL-terminated strings correctly.
30466 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
30468 o Code simplifications and refactoring:
30469 - Fix some urls in the exit notice file and make it XHTML1.1 strict
30470 compliant. Based on a patch from Christian Kujau.
30471 - Don't use sed in asciidoc-helper anymore.
30472 - Make the build process fail if asciidoc cannot be found and
30473 building with asciidoc isn't disabled.
30476 Changes in version 0.2.2.9-alpha - 2010-02-22
30477 Tor 0.2.2.9-alpha makes Tor work again on the latest OS X, updates the
30478 location of a directory authority, and cleans up a bunch of small bugs.
30480 o Directory authority changes:
30481 - Change IP address for dannenberg (v3 directory authority), and
30482 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
30483 service directory authority) from the list.
30486 - Make Tor work again on the latest OS X: when deciding whether to
30487 use strange flags to turn TLS renegotiation on, detect the OpenSSL
30488 version at run-time, not compile time. We need to do this because
30489 Apple doesn't update its dev-tools headers when it updates its
30490 libraries in a security patch.
30491 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
30492 that could happen on 32-bit platforms with 64-bit time_t. Also fix
30493 a memory leak when requesting a hidden service descriptor we've
30494 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
30496 - Authorities could be tricked into giving out the Exit flag to relays
30497 that didn't allow exiting to any ports. This bug could screw
30498 with load balancing and stats. Bugfix on 0.1.1.6-alpha; fixes bug
30499 1238. Bug discovered by Martin Kowalczyk.
30500 - When freeing a session key, zero it out completely. We only zeroed
30501 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
30502 patched by ekir. Fixes bug 1254.
30505 - Fix static compilation by listing the openssl libraries in the right
30506 order. Bugfix on Tor 0.2.2.8-alpha; fixes bug 1237.
30507 - Resume handling .exit hostnames in a special way: originally we
30508 stripped the .exit part and used the requested exit relay. In
30509 0.2.2.1-alpha we stopped treating them in any special way, meaning
30510 if you use a .exit address then Tor will pass it on to the exit
30511 relay. Now we reject the .exit stream outright, since that behavior
30512 might be more expected by the user. Found and diagnosed by Scott
30513 Bennett and Downie on or-talk.
30514 - Don't spam the controller with events when we have no file
30515 descriptors available. Bugfix on 0.2.1.5-alpha. (Rate-limiting
30516 for log messages was already solved from bug 748.)
30517 - Avoid a bogus overlapped memcpy in tor_addr_copy(). Reported by
30519 - Make the DNSPort option work with libevent 2.x. Don't alter the
30520 behavior for libevent 1.x. Fixes bug 1143. Found by SwissTorExit.
30521 - Emit a GUARD DROPPED controller event for a case we missed.
30522 - Make more fields in the controller protocol case-insensitive, since
30523 control-spec.txt said they were.
30524 - Refactor resolve_my_address() to not use gethostbyname() anymore.
30525 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
30526 - Fix a spec conformance issue: the network-status-version token
30527 must be the first token in a v3 consensus or vote. Discovered by
30528 parakeep. Bugfix on 0.2.0.3-alpha.
30530 o Code simplifications and refactoring:
30531 - Generate our manpage and HTML documentation using Asciidoc. This
30532 change should make it easier to maintain the documentation, and
30533 produce nicer HTML.
30534 - Remove the --enable-iphone option. According to reports from Marco
30535 Bonetti, Tor builds fine without any special tweaking on recent
30536 iPhone SDK versions.
30537 - Removed some unnecessary files from the source distribution. The
30538 AUTHORS file has now been merged into the people page on the
30539 website. The roadmaps and design doc can now be found in the
30540 projects directory in svn.
30541 - Enabled various circuit build timeout constants to be controlled
30542 by consensus parameters. Also set better defaults for these
30543 parameters based on experimentation on broadband and simulated
30544 high latency links.
30547 - The 'EXTENDCIRCUIT' control port command can now be used with
30548 a circ id of 0 and no path. This feature will cause Tor to build
30549 a new 'fast' general purpose circuit using its own path selection
30551 - Added a BUILDTIMEOUT_SET controller event to describe changes
30552 to the circuit build timeout.
30553 - Future-proof the controller protocol a bit by ignoring keyword
30554 arguments we do not recognize.
30555 - Expand homedirs passed to tor-checkkey. This should silence a
30556 coverity complaint about passing a user-supplied string into
30557 open() without checking it.
30560 Changes in version 0.2.1.25 - 2010-03-16
30561 Tor 0.2.1.25 fixes a regression introduced in 0.2.1.23 that could
30562 prevent relays from guessing their IP address correctly. It also fixes
30563 several minor potential security bugs.
30566 - Fix a regression from our patch for bug 1244 that caused relays
30567 to guess their IP address incorrectly if they didn't set Address
30568 in their torrc and/or their address fails to resolve. Bugfix on
30569 0.2.1.23; fixes bug 1269.
30570 - When freeing a session key, zero it out completely. We only zeroed
30571 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
30572 patched by ekir. Fixes bug 1254.
30575 - Fix a dereference-then-NULL-check sequence when publishing
30576 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
30578 - Fix another dereference-then-NULL-check sequence. Bugfix on
30579 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
30580 - Make sure we treat potentially not NUL-terminated strings correctly.
30581 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
30585 Changes in version 0.2.1.24 - 2010-02-21
30586 Tor 0.2.1.24 makes Tor work again on the latest OS X -- this time
30590 - Work correctly out-of-the-box with even more vendor-patched versions
30591 of OpenSSL. In particular, make it so Debian and OS X don't need
30592 customized patches to run/build.
30595 Changes in version 0.2.1.23 - 2010-02-13
30596 Tor 0.2.1.23 fixes a huge client-side performance bug, makes Tor work
30597 again on the latest OS X, and updates the location of a directory
30600 o Major bugfixes (performance):
30601 - We were selecting our guards uniformly at random, and then weighting
30602 which of our guards we'd use uniformly at random. This imbalance
30603 meant that Tor clients were severely limited on throughput (and
30604 probably latency too) by the first hop in their circuit. Now we
30605 select guards weighted by currently advertised bandwidth. We also
30606 automatically discard guards picked using the old algorithm. Fixes
30607 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
30610 - Make Tor work again on the latest OS X: when deciding whether to
30611 use strange flags to turn TLS renegotiation on, detect the OpenSSL
30612 version at run-time, not compile time. We need to do this because
30613 Apple doesn't update its dev-tools headers when it updates its
30614 libraries in a security patch.
30615 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
30616 that could happen on 32-bit platforms with 64-bit time_t. Also fix
30617 a memory leak when requesting a hidden service descriptor we've
30618 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
30621 o Directory authority changes:
30622 - Change IP address for dannenberg (v3 directory authority), and
30623 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
30624 service directory authority) from the list.
30627 - Refactor resolve_my_address() to not use gethostbyname() anymore.
30628 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
30631 - Avoid a mad rush at the beginning of each month when each client
30632 rotates half of its guards. Instead we spread the rotation out
30633 throughout the month, but we still avoid leaving a precise timestamp
30634 in the state file about when we first picked the guard. Improves
30635 over the behavior introduced in 0.1.2.17.
30638 Changes in version 0.2.2.8-alpha - 2010-01-26
30639 Tor 0.2.2.8-alpha fixes a crash bug in 0.2.2.7-alpha that has been
30640 causing bridge relays to disappear. If you're running a bridge,
30644 - Fix a memory corruption bug on bridges that occurred during the
30645 inclusion of stats data in extra-info descriptors. Also fix the
30646 interface for geoip_get_bridge_stats* to prevent similar bugs in
30647 the future. Diagnosis by Tas, patch by Karsten and Sebastian.
30648 Fixes bug 1208; bugfix on 0.2.2.7-alpha.
30651 - Ignore OutboundBindAddress when connecting to localhost.
30652 Connections to localhost need to come _from_ localhost, or else
30653 local servers (like DNS and outgoing HTTP/SOCKS proxies) will often
30657 Changes in version 0.2.2.7-alpha - 2010-01-19
30658 Tor 0.2.2.7-alpha fixes a huge client-side performance bug, as well
30659 as laying the groundwork for further relay-side performance fixes. It
30660 also starts cleaning up client behavior with respect to the EntryNodes,
30661 ExitNodes, and StrictNodes config options.
30663 This release also rotates two directory authority keys, due to a
30664 security breach of some of the Torproject servers.
30666 o Directory authority changes:
30667 - Rotate keys (both v3 identity and relay identity) for moria1
30670 o Major features (performance):
30671 - We were selecting our guards uniformly at random, and then weighting
30672 which of our guards we'd use uniformly at random. This imbalance
30673 meant that Tor clients were severely limited on throughput (and
30674 probably latency too) by the first hop in their circuit. Now we
30675 select guards weighted by currently advertised bandwidth. We also
30676 automatically discard guards picked using the old algorithm. Fixes
30677 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
30678 - When choosing which cells to relay first, relays can now favor
30679 circuits that have been quiet recently, to provide lower latency
30680 for low-volume circuits. By default, relays enable or disable this
30681 feature based on a setting in the consensus. You can override
30682 this default by using the new "CircuitPriorityHalflife" config
30683 option. Design and code by Ian Goldberg, Can Tang, and Chris
30685 - Add separate per-conn write limiting to go with the per-conn read
30686 limiting. We added a global write limit in Tor 0.1.2.5-alpha,
30687 but never per-conn write limits.
30688 - New consensus params "bwconnrate" and "bwconnburst" to let us
30689 rate-limit client connections as they enter the network. It's
30690 controlled in the consensus so we can turn it on and off for
30691 experiments. It's starting out off. Based on proposal 163.
30693 o Major features (relay selection options):
30694 - Switch to a StrictNodes config option, rather than the previous
30695 "StrictEntryNodes" / "StrictExitNodes" separation that was missing a
30696 "StrictExcludeNodes" option.
30697 - If EntryNodes, ExitNodes, ExcludeNodes, or ExcludeExitNodes
30698 change during a config reload, mark and discard all our origin
30699 circuits. This fix should address edge cases where we change the
30700 config options and but then choose a circuit that we created before
30702 - If EntryNodes or ExitNodes are set, be more willing to use an
30703 unsuitable (e.g. slow or unstable) circuit. The user asked for it,
30705 - Make EntryNodes config option much more aggressive even when
30706 StrictNodes is not set. Before it would prepend your requested
30707 entrynodes to your list of guard nodes, but feel free to use others
30708 after that. Now it chooses only from your EntryNodes if any of
30709 those are available, and only falls back to others if a) they're
30710 all down and b) StrictNodes is not set.
30711 - Now we refresh your entry guards from EntryNodes at each consensus
30712 fetch -- rather than just at startup and then they slowly rot as
30713 the network changes.
30716 - Stop bridge directory authorities from answering dbg-stability.txt
30717 directory queries, which would let people fetch a list of all
30718 bridge identities they track. Bugfix on 0.2.1.6-alpha.
30721 - Log a notice when we get a new control connection. Now it's easier
30722 for security-conscious users to recognize when a local application
30723 is knocking on their controller door. Suggested by bug 1196.
30724 - New config option "CircuitStreamTimeout" to override our internal
30725 timeout schedule for how many seconds until we detach a stream from
30726 a circuit and try a new circuit. If your network is particularly
30727 slow, you might want to set this to a number like 60.
30728 - New controller command "getinfo config-text". It returns the
30729 contents that Tor would write if you send it a SAVECONF command,
30730 so the controller can write the file to disk itself.
30731 - New options for SafeLogging to allow scrubbing only log messages
30732 generated while acting as a relay.
30733 - Ship the bridges spec file in the tarball too.
30734 - Avoid a mad rush at the beginning of each month when each client
30735 rotates half of its guards. Instead we spread the rotation out
30736 throughout the month, but we still avoid leaving a precise timestamp
30737 in the state file about when we first picked the guard. Improves
30738 over the behavior introduced in 0.1.2.17.
30740 o Minor bugfixes (compiling):
30741 - Fix compilation on OS X 10.3, which has a stub mlockall() but
30742 hides it. Bugfix on 0.2.2.6-alpha.
30743 - Fix compilation on Solaris by removing support for the
30744 DisableAllSwap config option. Solaris doesn't have an rlimit for
30745 mlockall, so we cannot use it safely. Fixes bug 1198; bugfix on
30748 o Minor bugfixes (crashes):
30749 - Do not segfault when writing buffer stats when we haven't observed
30750 a single circuit to report about. Found by Fabian Lanze. Bugfix on
30752 - If we're in the pathological case where there's no exit bandwidth
30753 but there is non-exit bandwidth, or no guard bandwidth but there
30754 is non-guard bandwidth, don't crash during path selection. Bugfix
30756 - Fix an impossible-to-actually-trigger buffer overflow in relay
30757 descriptor generation. Bugfix on 0.1.0.15.
30759 o Minor bugfixes (privacy):
30760 - Fix an instance where a Tor directory mirror might accidentally
30761 log the IP address of a misbehaving Tor client. Bugfix on
30763 - Don't list Windows capabilities in relay descriptors. We never made
30764 use of them, and maybe it's a bad idea to publish them. Bugfix
30767 o Minor bugfixes (other):
30768 - Resolve an edge case in path weighting that could make us misweight
30769 our relay selection. Fixes bug 1203; bugfix on 0.0.8rc1.
30770 - Fix statistics on client numbers by country as seen by bridges that
30771 were broken in 0.2.2.1-alpha. Also switch to reporting full 24-hour
30772 intervals instead of variable 12-to-48-hour intervals.
30773 - After we free an internal connection structure, overwrite it
30774 with a different memory value than we use for overwriting a freed
30775 internal circuit structure. Should help with debugging. Suggested
30777 - Update our OpenSSL 0.9.8l fix so that it works with OpenSSL 0.9.8m
30780 o Removed features:
30781 - Remove the HSAuthorityRecordStats option that version 0 hidden
30782 service authorities could have used to track statistics of overall
30783 hidden service usage.
30786 Changes in version 0.2.1.22 - 2010-01-19
30787 Tor 0.2.1.22 fixes a critical privacy problem in bridge directory
30788 authorities -- it would tell you its whole history of bridge descriptors
30789 if you make the right directory request. This stable update also
30790 rotates two of the seven v3 directory authority keys and locations.
30792 o Directory authority changes:
30793 - Rotate keys (both v3 identity and relay identity) for moria1
30797 - Stop bridge directory authorities from answering dbg-stability.txt
30798 directory queries, which would let people fetch a list of all
30799 bridge identities they track. Bugfix on 0.2.1.6-alpha.
30802 Changes in version 0.2.1.21 - 2009-12-21
30803 Tor 0.2.1.21 fixes an incompatibility with the most recent OpenSSL
30804 library. If you use Tor on Linux / Unix and you're getting SSL
30805 renegotiation errors, upgrading should help. We also recommend an
30806 upgrade if you're an exit relay.
30809 - Work around a security feature in OpenSSL 0.9.8l that prevents our
30810 handshake from working unless we explicitly tell OpenSSL that we
30811 are using SSL renegotiation safely. We are, of course, but OpenSSL
30812 0.9.8l won't work unless we say we are.
30813 - Avoid crashing if the client is trying to upload many bytes and the
30814 circuit gets torn down at the same time, or if the flip side
30815 happens on the exit relay. Bugfix on 0.2.0.1-alpha; fixes bug 1150.
30818 - Do not refuse to learn about authority certs and v2 networkstatus
30819 documents that are older than the latest consensus. This bug might
30820 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
30821 Spotted and fixed by xmux.
30822 - Fix a couple of very-hard-to-trigger memory leaks, and one hard-to-
30823 trigger platform-specific option misparsing case found by Coverity
30825 - Fix a compilation warning on Fedora 12 by removing an impossible-to-
30826 trigger assert. Fixes bug 1173.
30829 Changes in version 0.2.2.6-alpha - 2009-11-19
30830 Tor 0.2.2.6-alpha lays the groundwork for many upcoming features:
30831 support for the new lower-footprint "microdescriptor" directory design,
30832 future-proofing our consensus format against new hash functions or
30833 other changes, and an Android port. It also makes Tor compatible with
30834 the upcoming OpenSSL 0.9.8l release, and fixes a variety of bugs.
30837 - Directory authorities can now create, vote on, and serve multiple
30838 parallel formats of directory data as part of their voting process.
30839 Partially implements Proposal 162: "Publish the consensus in
30841 - Directory authorities can now agree on and publish small summaries
30842 of router information that clients can use in place of regular
30843 server descriptors. This transition will eventually allow clients
30844 to use far less bandwidth for downloading information about the
30845 network. Begins the implementation of Proposal 158: "Clients
30846 download consensus + microdescriptors".
30847 - The directory voting system is now extensible to use multiple hash
30848 algorithms for signatures and resource selection. Newer formats
30849 are signed with SHA256, with a possibility for moving to a better
30850 hash algorithm in the future.
30851 - New DisableAllSwap option. If set to 1, Tor will attempt to lock all
30852 current and future memory pages via mlockall(). On supported
30853 platforms (modern Linux and probably BSD but not Windows or OS X),
30854 this should effectively disable any and all attempts to page out
30855 memory. This option requires that you start your Tor as root --
30856 if you use DisableAllSwap, please consider using the User option
30857 to properly reduce the privileges of your Tor.
30858 - Numerous changes, bugfixes, and workarounds from Nathan Freitas
30859 to help Tor build correctly for Android phones.
30862 - Work around a security feature in OpenSSL 0.9.8l that prevents our
30863 handshake from working unless we explicitly tell OpenSSL that we
30864 are using SSL renegotiation safely. We are, but OpenSSL 0.9.8l
30865 won't work unless we say we are.
30868 - Fix a crash bug when trying to initialize the evdns module in
30869 Libevent 2. Bugfix on 0.2.1.16-rc.
30870 - Stop logging at severity 'warn' when some other Tor client tries
30871 to establish a circuit with us using weak DH keys. It's a protocol
30872 violation, but that doesn't mean ordinary users need to hear about
30873 it. Fixes the bug part of bug 1114. Bugfix on 0.1.0.13.
30874 - Do not refuse to learn about authority certs and v2 networkstatus
30875 documents that are older than the latest consensus. This bug might
30876 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
30877 Spotted and fixed by xmux.
30878 - Fix numerous small code-flaws found by Coverity Scan Rung 3.
30879 - If all authorities restart at once right before a consensus vote,
30880 nobody will vote about "Running", and clients will get a consensus
30881 with no usable relays. Instead, authorities refuse to build a
30882 consensus if this happens. Bugfix on 0.2.0.10-alpha; fixes bug 1066.
30883 - If your relay can't keep up with the number of incoming create
30884 cells, it would log one warning per failure into your logs. Limit
30885 warnings to 1 per minute. Bugfix on 0.0.2pre10; fixes bug 1042.
30886 - Bridges now use "reject *:*" as their default exit policy. Bugfix
30887 on 0.2.0.3-alpha; fixes bug 1113.
30888 - Fix a memory leak on directory authorities during voting that was
30889 introduced in 0.2.2.1-alpha. Found via valgrind.
30892 Changes in version 0.2.1.20 - 2009-10-15
30893 Tor 0.2.1.20 fixes a crash bug when you're accessing many hidden
30894 services at once, prepares for more performance improvements, and
30895 fixes a bunch of smaller bugs.
30897 The Windows and OS X bundles also include a more recent Vidalia,
30898 and switch from Privoxy to Polipo.
30900 The OS X installers are now drag and drop. It's best to un-install
30901 Tor/Vidalia and then install this new bundle, rather than upgrade. If
30902 you want to upgrade, you'll need to update the paths for Tor and Polipo
30903 in the Vidalia Settings window.
30906 - Send circuit or stream sendme cells when our window has decreased
30907 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
30908 by Karsten when testing the "reduce circuit window" performance
30909 patch. Bugfix on the 54th commit on Tor -- from July 2002,
30910 before the release of Tor 0.0.0. This is the new winner of the
30912 - Fix a remotely triggerable memory leak when a consensus document
30913 contains more than one signature from the same voter. Bugfix on
30915 - Avoid segfault in rare cases when finishing an introduction circuit
30916 as a client and finding out that we don't have an introduction key
30917 for it. Fixes bug 1073. Reported by Aaron Swartz.
30920 - Tor now reads the "circwindow" parameter out of the consensus,
30921 and uses that value for its circuit package window rather than the
30922 default of 1000 cells. Begins the implementation of proposal 168.
30924 o New directory authorities:
30925 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
30927 - Move moria1 and tonga to alternate IP addresses.
30930 - Fix a signed/unsigned compile warning in 0.2.1.19.
30931 - Fix possible segmentation fault on directory authorities. Bugfix on
30933 - Fix an extremely rare infinite recursion bug that could occur if
30934 we tried to log a message after shutting down the log subsystem.
30935 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
30936 - Fix an obscure bug where hidden services on 64-bit big-endian
30937 systems might mis-read the timestamp in v3 introduce cells, and
30938 refuse to connect back to the client. Discovered by "rotor".
30939 Bugfix on 0.2.1.6-alpha.
30940 - We were triggering a CLOCK_SKEW controller status event whenever
30941 we connect via the v2 connection protocol to any relay that has
30942 a wrong clock. Instead, we should only inform the controller when
30943 it's a trusted authority that claims our clock is wrong. Bugfix
30944 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
30945 - We were telling the controller about CHECKING_REACHABILITY and
30946 REACHABILITY_FAILED status events whenever we launch a testing
30947 circuit or notice that one has failed. Instead, only tell the
30948 controller when we want to inform the user of overall success or
30949 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
30951 - Don't warn when we're using a circuit that ends with a node
30952 excluded in ExcludeExitNodes, but the circuit is not used to access
30953 the outside world. This should help fix bug 1090. Bugfix on
30955 - Work around a small memory leak in some versions of OpenSSL that
30956 stopped the memory used by the hostname TLS extension from being
30960 - Add a "getinfo status/accepted-server-descriptor" controller
30961 command, which is the recommended way for controllers to learn
30962 whether our server descriptor has been successfully received by at
30963 least on directory authority. Un-recommend good-server-descriptor
30964 getinfo and status events until we have a better design for them.
30967 Changes in version 0.2.2.5-alpha - 2009-10-11
30968 Tor 0.2.2.5-alpha fixes a few compile problems in 0.2.2.4-alpha.
30971 - Make the tarball compile again. Oops. Bugfix on 0.2.2.4-alpha.
30973 o Directory authorities:
30974 - Temporarily (just for this release) move dizum to an alternate
30978 Changes in version 0.2.2.4-alpha - 2009-10-10
30979 Tor 0.2.2.4-alpha fixes more crash bugs in 0.2.2.2-alpha. It also
30980 introduces a new unit test framework, shifts directry authority
30981 addresses around to reduce the impact from recent blocking events,
30982 and fixes a few smaller bugs.
30985 - Fix several more asserts in the circuit_build_times code, for
30986 example one that causes Tor to fail to start once we have
30987 accumulated 5000 build times in the state file. Bugfixes on
30988 0.2.2.2-alpha; fixes bug 1108.
30990 o New directory authorities:
30991 - Move moria1 and Tonga to alternate IP addresses.
30994 - Log SSL state transitions at debug level during handshake, and
30995 include SSL states in error messages. This may help debug future
30996 SSL handshake issues.
30997 - Add a new "Handshake" log domain for activities that happen
30998 during the TLS handshake.
30999 - Revert to the "June 3 2009" ip-to-country file. The September one
31000 seems to have removed most US IP addresses.
31001 - Directory authorities now reject Tor relays with versions less than
31002 0.1.2.14. This step cuts out four relays from the current network,
31003 none of which are very big.
31006 - Fix a couple of smaller issues with gathering statistics. Bugfixes
31008 - Fix two memory leaks in the error case of
31009 circuit_build_times_parse_state(). Bugfix on 0.2.2.2-alpha.
31010 - Don't count one-hop circuits when we're estimating how long it
31011 takes circuits to build on average. Otherwise we'll set our circuit
31012 build timeout lower than we should. Bugfix on 0.2.2.2-alpha.
31013 - Directory authorities no longer change their opinion of, or vote on,
31014 whether a router is Running, unless they have themselves been
31015 online long enough to have some idea. Bugfix on 0.2.0.6-alpha.
31018 o Code simplifications and refactoring:
31019 - Revise our unit tests to use the "tinytest" framework, so we
31020 can run tests in their own processes, have smarter setup/teardown
31021 code, and so on. The unit test code has moved to its own
31022 subdirectory, and has been split into multiple modules.
31025 Changes in version 0.2.2.3-alpha - 2009-09-23
31026 Tor 0.2.2.3-alpha fixes a few crash bugs in 0.2.2.2-alpha.
31029 - Fix an overzealous assert in our new circuit build timeout code.
31030 Bugfix on 0.2.2.2-alpha; fixes bug 1103.
31033 - If the networkstatus consensus tells us that we should use a
31034 negative circuit package window, ignore it. Otherwise we'll
31035 believe it and then trigger an assert. Bugfix on 0.2.2.2-alpha.
31038 Changes in version 0.2.2.2-alpha - 2009-09-21
31039 Tor 0.2.2.2-alpha introduces our latest performance improvement for
31040 clients: Tor tracks the average time it takes to build a circuit, and
31041 avoids using circuits that take too long to build. For fast connections,
31042 this feature can cut your expected latency in half. For slow or flaky
31043 connections, it could ruin your Tor experience. Let us know if it does!
31046 - Tor now tracks how long it takes to build client-side circuits
31047 over time, and adapts its timeout to local network performance.
31048 Since a circuit that takes a long time to build will also provide
31049 bad performance, we get significant latency improvements by
31050 discarding the slowest 20% of circuits. Specifically, Tor creates
31051 circuits more aggressively than usual until it has enough data
31052 points for a good timeout estimate. Implements proposal 151.
31053 We are especially looking for reports (good and bad) from users with
31054 both EDGE and broadband connections that can move from broadband
31055 to EDGE and find out if the build-time data in the .tor/state gets
31056 reset without loss of Tor usability. You should also see a notice
31057 log message telling you that Tor has reset its timeout.
31058 - Directory authorities can now vote on arbitrary integer values as
31059 part of the consensus process. This is designed to help set
31060 network-wide parameters. Implements proposal 167.
31061 - Tor now reads the "circwindow" parameter out of the consensus,
31062 and uses that value for its circuit package window rather than the
31063 default of 1000 cells. Begins the implementation of proposal 168.
31066 - Fix a remotely triggerable memory leak when a consensus document
31067 contains more than one signature from the same voter. Bugfix on
31071 - Fix an extremely rare infinite recursion bug that could occur if
31072 we tried to log a message after shutting down the log subsystem.
31073 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
31074 - Fix parsing for memory or time units given without a space between
31075 the number and the unit. Bugfix on 0.2.2.1-alpha; fixes bug 1076.
31076 - A networkstatus vote must contain exactly one signature. Spec
31077 conformance issue. Bugfix on 0.2.0.3-alpha.
31078 - Fix an obscure bug where hidden services on 64-bit big-endian
31079 systems might mis-read the timestamp in v3 introduce cells, and
31080 refuse to connect back to the client. Discovered by "rotor".
31081 Bugfix on 0.2.1.6-alpha.
31082 - We were triggering a CLOCK_SKEW controller status event whenever
31083 we connect via the v2 connection protocol to any relay that has
31084 a wrong clock. Instead, we should only inform the controller when
31085 it's a trusted authority that claims our clock is wrong. Bugfix
31086 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
31087 - We were telling the controller about CHECKING_REACHABILITY and
31088 REACHABILITY_FAILED status events whenever we launch a testing
31089 circuit or notice that one has failed. Instead, only tell the
31090 controller when we want to inform the user of overall success or
31091 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
31093 - Don't warn when we're using a circuit that ends with a node
31094 excluded in ExcludeExitNodes, but the circuit is not used to access
31095 the outside world. This should help fix bug 1090, but more problems
31096 remain. Bugfix on 0.2.1.6-alpha.
31097 - Work around a small memory leak in some versions of OpenSSL that
31098 stopped the memory used by the hostname TLS extension from being
31100 - Make our 'torify' script more portable; if we have only one of
31101 'torsocks' or 'tsocks' installed, don't complain to the user;
31102 and explain our warning about tsocks better.
31105 - Add a "getinfo status/accepted-server-descriptor" controller
31106 command, which is the recommended way for controllers to learn
31107 whether our server descriptor has been successfully received by at
31108 least on directory authority. Un-recommend good-server-descriptor
31109 getinfo and status events until we have a better design for them.
31110 - Update to the "September 4 2009" ip-to-country file.
31113 Changes in version 0.2.2.1-alpha - 2009-08-26
31114 Tor 0.2.2.1-alpha disables ".exit" address notation by default, allows
31115 Tor clients to bootstrap on networks where only port 80 is reachable,
31116 makes it more straightforward to support hardware crypto accelerators,
31117 and starts the groundwork for gathering stats safely at relays.
31120 - Start the process of disabling ".exit" address notation, since it
31121 can be used for a variety of esoteric application-level attacks
31122 on users. To reenable it, set "AllowDotExit 1" in your torrc. Fix
31125 o New directory authorities:
31126 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
31130 - New AccelName and AccelDir options add support for dynamic OpenSSL
31131 hardware crypto acceleration engines.
31132 - Tor now supports tunneling all of its outgoing connections over
31133 a SOCKS proxy, using the SOCKS4Proxy and/or SOCKS5Proxy
31134 configuration options. Code by Christopher Davis.
31137 - Send circuit or stream sendme cells when our window has decreased
31138 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
31139 by Karsten when testing the "reduce circuit window" performance
31140 patch. Bugfix on the 54th commit on Tor -- from July 2002,
31141 before the release of Tor 0.0.0. This is the new winner of the
31144 o New options for gathering stats safely:
31145 - Directory mirrors that set "DirReqStatistics 1" write statistics
31146 about directory requests to disk every 24 hours. As compared to the
31147 --enable-geoip-stats flag in 0.2.1.x, there are a few improvements:
31148 1) stats are written to disk exactly every 24 hours; 2) estimated
31149 shares of v2 and v3 requests are determined as mean values, not at
31150 the end of a measurement period; 3) unresolved requests are listed
31151 with country code '??'; 4) directories also measure download times.
31152 - Exit nodes that set "ExitPortStatistics 1" write statistics on the
31153 number of exit streams and transferred bytes per port to disk every
31155 - Relays that set "CellStatistics 1" write statistics on how long
31156 cells spend in their circuit queues to disk every 24 hours.
31157 - Entry nodes that set "EntryStatistics 1" write statistics on the
31158 rough number and origins of connecting clients to disk every 24
31160 - Relays that write any of the above statistics to disk and set
31161 "ExtraInfoStatistics 1" include the past 24 hours of statistics in
31162 their extra-info documents.
31165 - New --digests command-line switch to output the digests of the
31166 source files Tor was built with.
31167 - The "torify" script now uses torsocks where available.
31168 - The memarea code now uses a sentinel value at the end of each area
31169 to make sure nothing writes beyond the end of an area. This might
31170 help debug some conceivable causes of bug 930.
31171 - Time and memory units in the configuration file can now be set to
31172 fractional units. For example, "2.5 GB" is now a valid value for
31174 - Certain Tor clients (such as those behind check.torproject.org) may
31175 want to fetch the consensus in an extra early manner. To enable this
31176 a user may now set FetchDirInfoExtraEarly to 1. This also depends on
31177 setting FetchDirInfoEarly to 1. Previous behavior will stay the same
31178 as only certain clients who must have this information sooner should
31180 - Instead of adding the svn revision to the Tor version string, report
31181 the git commit (when we're building from a git checkout).
31184 - If any of the v3 certs we download are unparseable, we should
31185 actually notice the failure so we don't retry indefinitely. Bugfix
31186 on 0.2.0.x; reported by "rotator".
31187 - If the cached cert file is unparseable, warn but don't exit.
31188 - Fix possible segmentation fault on directory authorities. Bugfix on
31190 - When Tor fails to parse a descriptor of any kind, dump it to disk.
31191 Might help diagnosing bug 1051.
31193 o Deprecated and removed features:
31194 - The controller no longer accepts the old obsolete "addr-mappings/"
31195 or "unregistered-servers-" GETINFO values.
31196 - Hidden services no longer publish version 0 descriptors, and clients
31197 do not request or use version 0 descriptors. However, the old hidden
31198 service authorities still accept and serve version 0 descriptors
31199 when contacted by older hidden services/clients.
31200 - The EXTENDED_EVENTS and VERBOSE_NAMES controller features are now
31201 always on; using them is necessary for correct forward-compatible
31203 - Remove support for .noconnect style addresses. Nobody was using
31204 them, and they provided another avenue for detecting Tor users
31205 via application-level web tricks.
31207 o Packaging changes:
31208 - Upgrade Vidalia from 0.1.15 to 0.2.3 in the Windows and OS X
31209 installer bundles. See
31210 https://trac.vidalia-project.net/browser/vidalia/tags/vidalia-0.2.3/CHANGELOG
31211 for details of what's new in Vidalia 0.2.3.
31212 - Windows Vidalia Bundle: update Privoxy from 3.0.6 to 3.0.14-beta.
31213 - OS X Vidalia Bundle: move to Polipo 1.0.4 with Tor specific
31214 configuration file, rather than the old Privoxy.
31215 - OS X Vidalia Bundle: Vidalia, Tor, and Polipo are compiled as
31216 x86-only for better compatibility with OS X 10.6, aka Snow Leopard.
31217 - OS X Tor Expert Bundle: Tor is compiled as x86-only for
31218 better compatibility with OS X 10.6, aka Snow Leopard.
31219 - OS X Vidalia Bundle: The multi-package installer is now replaced
31220 by a simple drag and drop to the /Applications folder. This change
31221 occurred with the upgrade to Vidalia 0.2.3.
31224 Changes in version 0.2.1.19 - 2009-07-28
31225 Tor 0.2.1.19 fixes a major bug with accessing and providing hidden
31226 services on Tor 0.2.1.3-alpha through 0.2.1.18.
31229 - Make accessing hidden services on 0.2.1.x work right again.
31230 Bugfix on 0.2.1.3-alpha; workaround for bug 1038. Diagnosis and
31231 part of patch provided by "optimist".
31234 - When a relay/bridge is writing out its identity key fingerprint to
31235 the "fingerprint" file and to its logs, write it without spaces. Now
31236 it will look like the fingerprints in our bridges documentation,
31237 and confuse fewer users.
31240 - Relays no longer publish a new server descriptor if they change
31241 their MaxAdvertisedBandwidth config option but it doesn't end up
31242 changing their advertised bandwidth numbers. Bugfix on 0.2.0.28-rc;
31243 fixes bug 1026. Patch from Sebastian.
31244 - Avoid leaking memory every time we get a create cell but we have
31245 so many already queued that we refuse it. Bugfix on 0.2.0.19-alpha;
31246 fixes bug 1034. Reported by BarkerJr.
31249 Changes in version 0.2.1.18 - 2009-07-24
31250 Tor 0.2.1.18 lays the foundations for performance improvements,
31251 adds status events to help users diagnose bootstrap problems, adds
31252 optional authentication/authorization for hidden services, fixes a
31253 variety of potential anonymity problems, and includes a huge pile of
31254 other features and bug fixes.
31257 - Add LIBS=-lrt to Makefile.am so the Tor RPMs use a static libevent.
31260 Changes in version 0.2.1.17-rc - 2009-07-07
31261 Tor 0.2.1.17-rc marks the fourth -- and hopefully last -- release
31262 candidate for the 0.2.1.x series. It lays the groundwork for further
31263 client performance improvements, and also fixes a big bug with directory
31264 authorities that were causing them to assign Guard and Stable flags
31267 The Windows bundles also finally include the geoip database that we
31268 thought we'd been shipping since 0.2.0.x (oops), and the OS X bundles
31269 should actually install Torbutton rather than giving you a cryptic
31270 failure message (oops).
31273 - Clients now use the bandwidth values in the consensus, rather than
31274 the bandwidth values in each relay descriptor. This approach opens
31275 the door to more accurate bandwidth estimates once the directory
31276 authorities start doing active measurements. Implements more of
31280 - When Tor clients restart after 1-5 days, they discard all their
31281 cached descriptors as too old, but they still use the cached
31282 consensus document. This approach is good for robustness, but
31283 bad for performance: since they don't know any bandwidths, they
31284 end up choosing at random rather than weighting their choice by
31285 speed. Fixed by the above feature of putting bandwidths in the
31286 consensus. Bugfix on 0.2.0.x.
31287 - Directory authorities were neglecting to mark relays down in their
31288 internal histories if the relays fall off the routerlist without
31289 ever being found unreachable. So there were relays in the histories
31290 that haven't been seen for eight months, and are listed as being
31291 up for eight months. This wreaked havoc on the "median wfu"
31292 and "median mtbf" calculations, in turn making Guard and Stable
31293 flags very wrong, hurting network performance. Fixes bugs 696 and
31294 969. Bugfix on 0.2.0.6-alpha.
31297 - Serve the DirPortFrontPage page even when we have been approaching
31298 our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha.
31299 - The control port would close the connection before flushing long
31300 replies, such as the network consensus, if a QUIT command was issued
31301 before the reply had completed. Now, the control port flushes all
31302 pending replies before closing the connection. Also fixed a spurious
31303 warning when a QUIT command is issued after a malformed or rejected
31304 AUTHENTICATE command, but before the connection was closed. Patch
31305 by Marcus Griep. Bugfix on 0.2.0.x; fixes bugs 1015 and 1016.
31306 - When we can't find an intro key for a v2 hidden service descriptor,
31307 fall back to the v0 hidden service descriptor and log a bug message.
31308 Workaround for bug 1024.
31309 - Fix a log message that did not respect the SafeLogging option.
31313 - If we're a relay and we change our IP address, be more verbose
31314 about the reason that made us change. Should help track down
31315 further bugs for relays on dynamic IP addresses.
31318 Changes in version 0.2.0.35 - 2009-06-24
31320 - Avoid crashing in the presence of certain malformed descriptors.
31321 Found by lark, and by automated fuzzing.
31322 - Fix an edge case where a malicious exit relay could convince a
31323 controller that the client's DNS question resolves to an internal IP
31324 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
31327 - Finally fix the bug where dynamic-IP relays disappear when their
31328 IP address changes: directory mirrors were mistakenly telling
31329 them their old address if they asked via begin_dir, so they
31330 never got an accurate answer about their new address, so they
31331 just vanished after a day. For belt-and-suspenders, relays that
31332 don't set Address in their config now avoid using begin_dir for
31333 all direct connections. Should fix bugs 827, 883, and 900.
31334 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
31335 that would occur on some exit nodes when DNS failures and timeouts
31336 occurred in certain patterns. Fix for bug 957.
31339 - When starting with a cache over a few days old, do not leak
31340 memory for the obsolete router descriptors in it. Bugfix on
31341 0.2.0.33; fixes bug 672.
31342 - Hidden service clients didn't use a cached service descriptor that
31343 was older than 15 minutes, but wouldn't fetch a new one either,
31344 because there was already one in the cache. Now, fetch a v2
31345 descriptor unless the same descriptor was added to the cache within
31346 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
31349 Changes in version 0.2.1.16-rc - 2009-06-20
31350 Tor 0.2.1.16-rc speeds up performance for fast exit relays, and fixes
31351 a bunch of minor bugs.
31354 - Fix an edge case where a malicious exit relay could convince a
31355 controller that the client's DNS question resolves to an internal IP
31356 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
31358 o Major performance improvements (on 0.2.0.x):
31359 - Disable and refactor some debugging checks that forced a linear scan
31360 over the whole server-side DNS cache. These accounted for over 50%
31361 of CPU time on a relatively busy exit node's gprof profile. Found
31363 - Disable some debugging checks that appeared in exit node profile
31367 - Update to the "June 3 2009" ip-to-country file.
31368 - Do not have tor-resolve automatically refuse all .onion addresses;
31369 if AutomapHostsOnResolve is set in your torrc, this will work fine.
31371 o Minor bugfixes (on 0.2.0.x):
31372 - Log correct error messages for DNS-related network errors on
31374 - Fix a race condition that could cause crashes or memory corruption
31375 when running as a server with a controller listening for log
31377 - Avoid crashing when we have a policy specified in a DirPolicy or
31378 SocksPolicy or ReachableAddresses option with ports set on it,
31379 and we re-load the policy. May fix bug 996.
31380 - Hidden service clients didn't use a cached service descriptor that
31381 was older than 15 minutes, but wouldn't fetch a new one either,
31382 because there was already one in the cache. Now, fetch a v2
31383 descriptor unless the same descriptor was added to the cache within
31384 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
31386 o Minor bugfixes (on 0.2.1.x):
31387 - Don't warn users about low port and hibernation mix when they
31388 provide a *ListenAddress directive to fix that. Bugfix on
31390 - When switching back and forth between bridge mode, do not start
31391 gathering GeoIP data until two hours have passed.
31392 - Do not complain that the user has requested an excluded node as
31393 an exit when the node is not really an exit. This could happen
31394 because the circuit was for testing, or an introduction point.
31398 Changes in version 0.2.1.15-rc - 2009-05-25
31399 Tor 0.2.1.15-rc marks the second release candidate for the 0.2.1.x
31400 series. It fixes a major bug on fast exit relays, as well as a variety
31401 of more minor bugs.
31403 o Major bugfixes (on 0.2.0.x):
31404 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
31405 that would occur on some exit nodes when DNS failures and timeouts
31406 occurred in certain patterns. Fix for bug 957.
31408 o Minor bugfixes (on 0.2.0.x):
31409 - Actually return -1 in the error case for read_bandwidth_usage().
31410 Harmless bug, since we currently don't care about the return value
31411 anywhere. Bugfix on 0.2.0.9-alpha.
31412 - Provide a more useful log message if bug 977 (related to buffer
31413 freelists) ever reappears, and do not crash right away.
31414 - Fix an assertion failure on 64-bit platforms when we allocated
31415 memory right up to the end of a memarea, then realigned the memory
31416 one step beyond the end. Fixes a possible cause of bug 930.
31417 - Protect the count of open sockets with a mutex, so we can't
31418 corrupt it when two threads are closing or opening sockets at once.
31419 Fix for bug 939. Bugfix on 0.2.0.1-alpha.
31420 - Don't allow a bridge to publish its router descriptor to a
31421 non-bridge directory authority. Fixes part of bug 932.
31422 - When we change to or from being a bridge, reset our counts of
31423 client usage by country. Fixes bug 932.
31424 - Fix a bug that made stream bandwidth get misreported to the
31426 - Stop using malloc_usable_size() to use more area than we had
31427 actually allocated: it was safe, but made valgrind really unhappy.
31428 - Fix a memory leak when v3 directory authorities load their keys
31429 and cert from disk. Bugfix on 0.2.0.1-alpha.
31431 o Minor bugfixes (on 0.2.1.x):
31432 - Fix use of freed memory when deciding to mark a non-addable
31433 descriptor as never-downloadable. Bugfix on 0.2.1.9-alpha.
31436 Changes in version 0.2.1.14-rc - 2009-04-12
31437 Tor 0.2.1.14-rc marks the first release candidate for the 0.2.1.x
31438 series. It begins fixing some major performance problems, and also
31439 finally addresses the bug that was causing relays on dynamic IP
31440 addresses to fall out of the directory.
31443 - Clients replace entry guards that were chosen more than a few months
31444 ago. This change should significantly improve client performance,
31445 especially once more people upgrade, since relays that have been
31446 a guard for a long time are currently overloaded.
31448 o Major bugfixes (on 0.2.0):
31449 - Finally fix the bug where dynamic-IP relays disappear when their
31450 IP address changes: directory mirrors were mistakenly telling
31451 them their old address if they asked via begin_dir, so they
31452 never got an accurate answer about their new address, so they
31453 just vanished after a day. For belt-and-suspenders, relays that
31454 don't set Address in their config now avoid using begin_dir for
31455 all direct connections. Should fix bugs 827, 883, and 900.
31456 - Relays were falling out of the networkstatus consensus for
31457 part of a day if they changed their local config but the
31458 authorities discarded their new descriptor as "not sufficiently
31459 different". Now directory authorities accept a descriptor as changed
31460 if bandwidthrate or bandwidthburst changed. Partial fix for bug 962;
31461 patch by Sebastian.
31462 - Avoid crashing in the presence of certain malformed descriptors.
31463 Found by lark, and by automated fuzzing.
31466 - When generating circuit events with verbose nicknames for
31467 controllers, try harder to look up nicknames for routers on a
31468 circuit. (Previously, we would look in the router descriptors we had
31469 for nicknames, but not in the consensus.) Partial fix for bug 941.
31470 - If the bridge config line doesn't specify a port, assume 443.
31471 This makes bridge lines a bit smaller and easier for users to
31473 - Raise the minimum bandwidth to be a relay from 20000 bytes to 20480
31474 bytes (aka 20KB/s), to match our documentation. Also update
31475 directory authorities so they always assign the Fast flag to relays
31476 with 20KB/s of capacity. Now people running relays won't suddenly
31477 find themselves not seeing any use, if the network gets faster
31479 - Update to the "April 3 2009" ip-to-country file.
31482 - Avoid trying to print raw memory to the logs when we decide to
31483 give up on downloading a given relay descriptor. Bugfix on
31485 - In tor-resolve, when the Tor client to use is specified by
31486 <hostname>:<port>, actually use the specified port rather than
31487 defaulting to 9050. Bugfix on 0.2.1.6-alpha.
31488 - Make directory usage recording work again. Bugfix on 0.2.1.6-alpha.
31489 - When starting with a cache over a few days old, do not leak
31490 memory for the obsolete router descriptors in it. Bugfix on
31492 - Avoid double-free on list of successfully uploaded hidden
31493 service discriptors. Fix for bug 948. Bugfix on 0.2.1.6-alpha.
31494 - Change memarea_strndup() implementation to work even when
31495 duplicating a string at the end of a page. This bug was
31496 harmless for now, but could have meant crashes later. Fix by
31497 lark. Bugfix on 0.2.1.1-alpha.
31498 - Limit uploaded directory documents to be 16M rather than 500K.
31499 The directory authorities were refusing v3 consensus votes from
31500 other authorities, since the votes are now 504K. Fixes bug 959;
31501 bugfix on 0.0.2pre17 (where we raised it from 50K to 500K ;).
31502 - Directory authorities should never send a 503 "busy" response to
31503 requests for votes or keys. Bugfix on 0.2.0.8-alpha; exposed by
31507 Changes in version 0.2.1.13-alpha - 2009-03-09
31508 Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and
31509 cleanups. We're finally getting close to a release candidate.
31512 - Correctly update the list of which countries we exclude as
31513 exits, when the GeoIP file is loaded or reloaded. Diagnosed by
31514 lark. Bugfix on 0.2.1.6-alpha.
31516 o Minor bugfixes (on 0.2.0.x and earlier):
31517 - Automatically detect MacOSX versions earlier than 10.4.0, and
31518 disable kqueue from inside Tor when running with these versions.
31519 We previously did this from the startup script, but that was no
31520 help to people who didn't use the startup script. Resolves bug 863.
31521 - When we had picked an exit node for a connection, but marked it as
31522 "optional", and it turned out we had no onion key for the exit,
31523 stop wanting that exit and try again. This situation may not
31524 be possible now, but will probably become feasible with proposal
31525 158. Spotted by rovv. Fixes another case of bug 752.
31526 - Clients no longer cache certificates for authorities they do not
31527 recognize. Bugfix on 0.2.0.9-alpha.
31528 - When we can't transmit a DNS request due to a network error, retry
31529 it after a while, and eventually transmit a failing response to
31530 the RESOLVED cell. Bugfix on 0.1.2.5-alpha.
31531 - If the controller claimed responsibility for a stream, but that
31532 stream never finished making its connection, it would live
31533 forever in circuit_wait state. Now we close it after SocksTimeout
31534 seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry.
31535 - Drop begin cells to a hidden service if they come from the middle
31536 of a circuit. Patch from lark.
31537 - When we erroneously receive two EXTEND cells for the same circuit
31538 ID on the same connection, drop the second. Patch from lark.
31539 - Fix a crash that occurs on exit nodes when a nameserver request
31540 timed out. Bugfix on 0.1.2.1-alpha; our CLEAR debugging code had
31541 been suppressing the bug since 0.1.2.10-alpha. Partial fix for
31543 - Do not assume that a stack-allocated character array will be
31544 64-bit aligned on platforms that demand that uint64_t access is
31545 aligned. Possible fix for bug 604.
31546 - Parse dates and IPv4 addresses in a locale- and libc-independent
31547 manner, to avoid platform-dependent behavior on malformed input.
31548 - Build correctly when configured to build outside the main source
31549 path. Patch from Michael Gold.
31550 - We were already rejecting relay begin cells with destination port
31551 of 0. Now also reject extend cells with destination port or address
31552 of 0. Suggested by lark.
31554 o Minor bugfixes (on 0.2.1.x):
31555 - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
31556 cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
31557 - If we're an exit node, scrub the IP address to which we are exiting
31558 in the logs. Bugfix on 0.2.1.8-alpha.
31561 - On Linux, use the prctl call to re-enable core dumps when the user
31563 - New controller event NEWCONSENSUS that lists the networkstatus
31564 lines for every recommended relay. Now controllers like Torflow
31565 can keep up-to-date on which relays they should be using.
31566 - Update to the "February 26 2009" ip-to-country file.
31569 Changes in version 0.2.0.34 - 2009-02-08
31570 Tor 0.2.0.34 features several more security-related fixes. You should
31571 upgrade, especially if you run an exit relay (remote crash) or a
31572 directory authority (remote infinite loop), or you're on an older
31573 (pre-XP) or not-recently-patched Windows (remote exploit).
31575 This release marks end-of-life for Tor 0.1.2.x. Those Tor versions
31576 have many known flaws, and nobody should be using them. You should
31577 upgrade. If you're using a Linux or BSD and its packages are obsolete,
31578 stop using those packages and upgrade anyway.
31581 - Fix an infinite-loop bug on handling corrupt votes under certain
31582 circumstances. Bugfix on 0.2.0.8-alpha.
31583 - Fix a temporary DoS vulnerability that could be performed by
31584 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
31585 - Avoid a potential crash on exit nodes when processing malformed
31586 input. Remote DoS opportunity. Bugfix on 0.2.0.33.
31587 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
31588 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
31591 - Fix compilation on systems where time_t is a 64-bit integer.
31592 Patch from Matthias Drochner.
31593 - Don't consider expiring already-closed client connections. Fixes
31594 bug 893. Bugfix on 0.0.2pre20.
31597 Changes in version 0.2.1.12-alpha - 2009-02-08
31598 Tor 0.2.1.12-alpha features several more security-related fixes. You
31599 should upgrade, especially if you run an exit relay (remote crash) or
31600 a directory authority (remote infinite loop), or you're on an older
31601 (pre-XP) or not-recently-patched Windows (remote exploit). It also
31602 includes a big pile of minor bugfixes and cleanups.
31605 - Fix an infinite-loop bug on handling corrupt votes under certain
31606 circumstances. Bugfix on 0.2.0.8-alpha.
31607 - Fix a temporary DoS vulnerability that could be performed by
31608 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
31609 - Avoid a potential crash on exit nodes when processing malformed
31610 input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
31613 - Let controllers actually ask for the "clients_seen" event for
31614 getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
31615 reported by Matt Edman.
31616 - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
31618 - Fix a bug in address parsing that was preventing bridges or hidden
31619 service targets from being at IPv6 addresses.
31620 - Solve a bug that kept hardware crypto acceleration from getting
31621 enabled when accounting was turned on. Fixes bug 907. Bugfix on
31623 - Remove a bash-ism from configure.in to build properly on non-Linux
31624 platforms. Bugfix on 0.2.1.1-alpha.
31625 - Fix code so authorities _actually_ send back X-Descriptor-Not-New
31626 headers. Bugfix on 0.2.0.10-alpha.
31627 - Don't consider expiring already-closed client connections. Fixes
31628 bug 893. Bugfix on 0.0.2pre20.
31629 - Fix another interesting corner-case of bug 891 spotted by rovv:
31630 Previously, if two hosts had different amounts of clock drift, and
31631 one of them created a new connection with just the wrong timing,
31632 the other might decide to deprecate the new connection erroneously.
31633 Bugfix on 0.1.1.13-alpha.
31634 - Resolve a very rare crash bug that could occur when the user forced
31635 a nameserver reconfiguration during the middle of a nameserver
31636 probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
31637 - Support changing value of ServerDNSRandomizeCase during SIGHUP.
31638 Bugfix on 0.2.1.7-alpha.
31639 - If we're using bridges and our network goes away, be more willing
31640 to forgive our bridges and try again when we get an application
31641 request. Bugfix on 0.2.0.x.
31644 - Support platforms where time_t is 64 bits long. (Congratulations,
31645 NetBSD!) Patch from Matthias Drochner.
31646 - Add a 'getinfo status/clients-seen' controller command, in case
31647 controllers want to hear clients_seen events but connect late.
31650 - Disable GCC's strict alias optimization by default, to avoid the
31651 likelihood of its introducing subtle bugs whenever our code violates
31652 the letter of C99's alias rules.
31655 Changes in version 0.2.0.33 - 2009-01-21
31656 Tor 0.2.0.33 fixes a variety of bugs that were making relays less
31657 useful to users. It also finally fixes a bug where a relay or client
31658 that's been off for many days would take a long time to bootstrap.
31660 This update also fixes an important security-related bug reported by
31661 Ilja van Sprundel. You should upgrade. (We'll send out more details
31662 about the bug once people have had some time to upgrade.)
31665 - Fix a heap-corruption bug that may be remotely triggerable on
31666 some platforms. Reported by Ilja van Sprundel.
31669 - When a stream at an exit relay is in state "resolving" or
31670 "connecting" and it receives an "end" relay cell, the exit relay
31671 would silently ignore the end cell and not close the stream. If
31672 the client never closes the circuit, then the exit relay never
31673 closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
31674 reported by "wood".
31675 - When sending CREATED cells back for a given circuit, use a 64-bit
31676 connection ID to find the right connection, rather than an addr:port
31677 combination. Now that we can have multiple OR connections between
31678 the same ORs, it is no longer possible to use addr:port to uniquely
31679 identify a connection.
31680 - Bridge relays that had DirPort set to 0 would stop fetching
31681 descriptors shortly after startup, and then briefly resume
31682 after a new bandwidth test and/or after publishing a new bridge
31683 descriptor. Bridge users that try to bootstrap from them would
31684 get a recent networkstatus but would get descriptors from up to
31685 18 hours earlier, meaning most of the descriptors were obsolete
31686 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
31687 - Prevent bridge relays from serving their 'extrainfo' document
31688 to anybody who asks, now that extrainfo docs include potentially
31689 sensitive aggregated client geoip summaries. Bugfix on
31691 - If the cached networkstatus consensus is more than five days old,
31692 discard it rather than trying to use it. In theory it could be
31693 useful because it lists alternate directory mirrors, but in practice
31694 it just means we spend many minutes trying directory mirrors that
31695 are long gone from the network. Also discard router descriptors as
31696 we load them if they are more than five days old, since the onion
31697 key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
31700 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
31701 could make gcc generate non-functional binary search code. Bugfix
31703 - Build correctly on platforms without socklen_t.
31704 - Compile without warnings on solaris.
31705 - Avoid potential crash on internal error during signature collection.
31706 Fixes bug 864. Patch from rovv.
31707 - Correct handling of possible malformed authority signing key
31708 certificates with internal signature types. Fixes bug 880.
31709 Bugfix on 0.2.0.3-alpha.
31710 - Fix a hard-to-trigger resource leak when logging credential status.
31712 - When we can't initialize DNS because the network is down, do not
31713 automatically stop Tor from starting. Instead, we retry failed
31714 dns_init() every 10 minutes, and change the exit policy to reject
31715 *:* until one succeeds. Fixes bug 691.
31716 - Use 64 bits instead of 32 bits for connection identifiers used with
31717 the controller protocol, to greatly reduce risk of identifier reuse.
31718 - When we're choosing an exit node for a circuit, and we have
31719 no pending streams, choose a good general exit rather than one that
31720 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
31721 - Fix another case of assuming, when a specific exit is requested,
31722 that we know more than the user about what hosts it allows.
31723 Fixes one case of bug 752. Patch from rovv.
31724 - Clip the MaxCircuitDirtiness config option to a minimum of 10
31725 seconds. Warn the user if lower values are given in the
31726 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
31727 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
31728 user if lower values are given in the configuration. Bugfix on
31729 0.1.1.17-rc. Patch by Sebastian.
31730 - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
31731 the cache because we already had a v0 descriptor with the same ID.
31732 Bugfix on 0.2.0.18-alpha.
31733 - Fix a race condition when freeing keys shared between main thread
31734 and CPU workers that could result in a memory leak. Bugfix on
31735 0.1.0.1-rc. Fixes bug 889.
31736 - Send a valid END cell back when a client tries to connect to a
31737 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
31738 840. Patch from rovv.
31739 - Check which hops rendezvous stream cells are associated with to
31740 prevent possible guess-the-streamid injection attacks from
31741 intermediate hops. Fixes another case of bug 446. Based on patch
31743 - If a broken client asks a non-exit router to connect somewhere,
31744 do not even do the DNS lookup before rejecting the connection.
31745 Fixes another case of bug 619. Patch from rovv.
31746 - When a relay gets a create cell it can't decrypt (e.g. because it's
31747 using the wrong onion key), we were dropping it and letting the
31748 client time out. Now actually answer with a destroy cell. Fixes
31749 bug 904. Bugfix on 0.0.2pre8.
31751 o Minor bugfixes (hidden services):
31752 - Do not throw away existing introduction points on SIGHUP. Bugfix on
31753 0.0.6pre1. Patch by Karsten. Fixes bug 874.
31756 - Report the case where all signatures in a detached set are rejected
31757 differently than the case where there is an error handling the
31759 - When we realize that another process has modified our cached
31760 descriptors, print out a more useful error message rather than
31761 triggering an assertion. Fixes bug 885. Patch from Karsten.
31762 - Implement the 0x20 hack to better resist DNS poisoning: set the
31763 case on outgoing DNS requests randomly, and reject responses that do
31764 not match the case correctly. This logic can be disabled with the
31765 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
31766 of servers that do not reliably preserve case in replies. See
31767 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
31769 - Check DNS replies for more matching fields to better resist DNS
31771 - Never use OpenSSL compression: it wastes RAM and CPU trying to
31772 compress cells, which are basically all encrypted, compressed, or
31776 Changes in version 0.2.1.11-alpha - 2009-01-20
31777 Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a
31778 week it will take a long time to bootstrap again" bug. It also fixes
31779 an important security-related bug reported by Ilja van Sprundel. You
31780 should upgrade. (We'll send out more details about the bug once people
31781 have had some time to upgrade.)
31784 - Fix a heap-corruption bug that may be remotely triggerable on
31785 some platforms. Reported by Ilja van Sprundel.
31788 - Discard router descriptors as we load them if they are more than
31789 five days old. Otherwise if Tor is off for a long time and then
31790 starts with cached descriptors, it will try to use the onion
31791 keys in those obsolete descriptors when building circuits. Bugfix
31792 on 0.2.0.x. Fixes bug 887.
31795 - Try to make sure that the version of Libevent we're running with
31796 is binary-compatible with the one we built with. May address bug
31798 - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
31799 for bug 905. Bugfix on 0.2.1.7-alpha.
31800 - Add a new --enable-local-appdata configuration switch to change
31801 the default location of the datadir on win32 from APPDATA to
31802 LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
31803 entirely. Patch from coderman.
31806 - Make outbound DNS packets respect the OutboundBindAddress setting.
31807 Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
31808 - When our circuit fails at the first hop (e.g. we get a destroy
31809 cell back), avoid using that OR connection anymore, and also
31810 tell all the one-hop directory requests waiting for it that they
31811 should fail. Bugfix on 0.2.1.3-alpha.
31812 - In the torify(1) manpage, mention that tsocks will leak your
31816 Changes in version 0.2.1.10-alpha - 2009-01-06
31817 Tor 0.2.1.10-alpha fixes two major bugs in bridge relays (one that
31818 would make the bridge relay not so useful if it had DirPort set to 0,
31819 and one that could let an attacker learn a little bit of information
31820 about the bridge's users), and a bug that would cause your Tor relay
31821 to ignore a circuit create request it can't decrypt (rather than reply
31822 with an error). It also fixes a wide variety of other bugs.
31825 - If the cached networkstatus consensus is more than five days old,
31826 discard it rather than trying to use it. In theory it could
31827 be useful because it lists alternate directory mirrors, but in
31828 practice it just means we spend many minutes trying directory
31829 mirrors that are long gone from the network. Helps bug 887 a bit;
31831 - Bridge relays that had DirPort set to 0 would stop fetching
31832 descriptors shortly after startup, and then briefly resume
31833 after a new bandwidth test and/or after publishing a new bridge
31834 descriptor. Bridge users that try to bootstrap from them would
31835 get a recent networkstatus but would get descriptors from up to
31836 18 hours earlier, meaning most of the descriptors were obsolete
31837 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
31838 - Prevent bridge relays from serving their 'extrainfo' document
31839 to anybody who asks, now that extrainfo docs include potentially
31840 sensitive aggregated client geoip summaries. Bugfix on
31844 - New controller event "clients_seen" to report a geoip-based summary
31845 of which countries we've seen clients from recently. Now controllers
31846 like Vidalia can show bridge operators that they're actually making
31848 - Build correctly against versions of OpenSSL 0.9.8 or later built
31849 without support for deprecated functions.
31850 - Update to the "December 19 2008" ip-to-country file.
31852 o Minor bugfixes (on 0.2.0.x):
31853 - Authorities now vote for the Stable flag for any router whose
31854 weighted MTBF is at least 5 days, regardless of the mean MTBF.
31855 - Do not remove routers as too old if we do not have any consensus
31856 document. Bugfix on 0.2.0.7-alpha.
31857 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
31858 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
31859 - When an exit relay resolves a stream address to a local IP address,
31860 do not just keep retrying that same exit relay over and
31861 over. Instead, just close the stream. Addresses bug 872. Bugfix
31862 on 0.2.0.32. Patch from rovv.
31863 - If a hidden service sends us an END cell, do not consider
31864 retrying the connection; just close it. Patch from rovv.
31865 - When we made bridge authorities stop serving bridge descriptors over
31866 unencrypted links, we also broke DirPort reachability testing for
31867 bridges. So bridges with a non-zero DirPort were printing spurious
31868 warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
31869 - When a relay gets a create cell it can't decrypt (e.g. because it's
31870 using the wrong onion key), we were dropping it and letting the
31871 client time out. Now actually answer with a destroy cell. Fixes
31872 bug 904. Bugfix on 0.0.2pre8.
31873 - Squeeze 2-5% out of client performance (according to oprofile) by
31874 improving the implementation of some policy-manipulation functions.
31876 o Minor bugfixes (on 0.2.1.x):
31877 - Make get_interface_address() function work properly again; stop
31878 guessing the wrong parts of our address as our address.
31879 - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
31880 send on that circuit. Otherwise we might violate the proposal-110
31881 limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
31883 - When we're sending non-EXTEND cells to the first hop in a circuit,
31884 for example to use an encrypted directory connection, we don't need
31885 to use RELAY_EARLY cells: the first hop knows what kind of cell
31886 it is, and nobody else can even see the cell type. Conserving
31887 RELAY_EARLY cells makes it easier to cannibalize circuits like
31889 - Stop logging nameserver addresses in reverse order.
31890 - If we are retrying a directory download slowly over and over, do
31891 not automatically give up after the 254th failure. Bugfix on
31893 - Resume reporting accurate "stream end" reasons to the local control
31894 port. They were lost in the changes for Proposal 148. Bugfix on
31897 o Deprecated and removed features:
31898 - The old "tor --version --version" command, which would print out
31899 the subversion "Id" of most of the source files, is now removed. It
31900 turned out to be less useful than we'd expected, and harder to
31903 o Code simplifications and refactoring:
31904 - Change our header file guard macros to be less likely to conflict
31905 with system headers. Adam Langley noticed that we were conflicting
31906 with log.h on Android.
31907 - Tool-assisted documentation cleanup. Nearly every function or
31908 static variable in Tor should have its own documentation now.
31911 Changes in version 0.2.1.9-alpha - 2008-12-25
31912 Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
31914 o New directory authorities:
31915 - gabelmoo (the authority run by Karsten Loesing) now has a new
31919 - Never use a connection with a mismatched address to extend a
31920 circuit, unless that connection is canonical. A canonical
31921 connection is one whose address is authenticated by the router's
31922 identity key, either in a NETINFO cell or in a router descriptor.
31923 - Avoid a possible memory corruption bug when receiving hidden service
31924 descriptors. Bugfix on 0.2.1.6-alpha.
31927 - Fix a logic error that would automatically reject all but the first
31928 configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
31929 part of bug 813/868. Bug spotted by coderman.
31930 - When a stream at an exit relay is in state "resolving" or
31931 "connecting" and it receives an "end" relay cell, the exit relay
31932 would silently ignore the end cell and not close the stream. If
31933 the client never closes the circuit, then the exit relay never
31934 closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
31935 reported by "wood".
31936 - When we can't initialize DNS because the network is down, do not
31937 automatically stop Tor from starting. Instead, retry failed
31938 dns_init() every 10 minutes, and change the exit policy to reject
31939 *:* until one succeeds. Fixes bug 691.
31942 - Give a better error message when an overzealous init script says
31943 "sudo -u username tor --user username". Makes Bug 882 easier for
31945 - When a directory authority gives us a new guess for our IP address,
31946 log which authority we used. Hopefully this will help us debug
31947 the recent complaints about bad IP address guesses.
31948 - Detect svn revision properly when we're using git-svn.
31949 - Try not to open more than one descriptor-downloading connection
31950 to an authority at once. This should reduce load on directory
31951 authorities. Fixes bug 366.
31952 - Add cross-certification to newly generated certificates, so that
31953 a signing key is enough information to look up a certificate.
31954 Partial implementation of proposal 157.
31955 - Start serving certificates by <identity digest, signing key digest>
31956 pairs. Partial implementation of proposal 157.
31957 - Clients now never report any stream end reason except 'MISC'.
31958 Implements proposal 148.
31959 - On platforms with a maximum syslog string length, truncate syslog
31960 messages to that length ourselves, rather than relying on the
31961 system to do it for us.
31962 - Optimize out calls to time(NULL) that occur for every IO operation,
31963 or for every cell. On systems where time() is a slow syscall,
31964 this fix will be slightly helpful.
31965 - Exit servers can now answer resolve requests for ip6.arpa addresses.
31966 - When we download a descriptor that we then immediately (as
31967 a directory authority) reject, do not retry downloading it right
31968 away. Should save some bandwidth on authorities. Fix for bug
31969 888. Patch by Sebastian Hahn.
31970 - When a download gets us zero good descriptors, do not notify
31971 Tor that new directory information has arrived.
31972 - Avoid some nasty corner cases in the logic for marking connections
31973 as too old or obsolete or noncanonical for circuits. Partial
31976 o Minor features (controller):
31977 - New CONSENSUS_ARRIVED event to note when a new consensus has
31978 been fetched and validated.
31979 - When we realize that another process has modified our cached
31980 descriptors file, print out a more useful error message rather
31981 than triggering an assertion. Fixes bug 885. Patch from Karsten.
31982 - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
31983 controllers to prevent SIGHUP from reloading the
31984 configuration. Fixes bug 856.
31987 - Resume using the correct "REASON=" stream when telling the
31988 controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
31989 - When a canonical connection appears later in our internal list
31990 than a noncanonical one for a given OR ID, always use the
31991 canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
31993 - Clip the MaxCircuitDirtiness config option to a minimum of 10
31994 seconds. Warn the user if lower values are given in the
31995 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
31996 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
31997 user if lower values are given in the configuration. Bugfix on
31998 0.1.1.17-rc. Patch by Sebastian.
31999 - Fix a race condition when freeing keys shared between main thread
32000 and CPU workers that could result in a memory leak. Bugfix on
32001 0.1.0.1-rc. Fixes bug 889.
32003 o Minor bugfixes (hidden services):
32004 - Do not throw away existing introduction points on SIGHUP (bugfix on
32005 0.0.6pre1); also, do not stall hidden services because we're
32006 throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
32007 by John Brooks. Patch by Karsten. Fixes bug 874.
32008 - Fix a memory leak when we decline to add a v2 rendezvous
32009 descriptor to the cache because we already had a v0 descriptor
32010 with the same ID. Bugfix on 0.2.0.18-alpha.
32012 o Deprecated and removed features:
32013 - RedirectExits has been removed. It was deprecated since
32015 - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
32016 has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
32017 - Cell pools are now always enabled; --disable-cell-pools is ignored.
32019 o Code simplifications and refactoring:
32020 - Rename the confusing or_is_obsolete field to the more appropriate
32021 is_bad_for_new_circs, and move it to or_connection_t where it
32023 - Move edge-only flags from connection_t to edge_connection_t: not
32024 only is this better coding, but on machines of plausible alignment,
32025 it should save 4-8 bytes per connection_t. "Every little bit helps."
32026 - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
32027 for consistency; keep old option working for backward compatibility.
32028 - Simplify the code for finding connections to use for a circuit.
32031 Changes in version 0.2.1.8-alpha - 2008-12-08
32032 Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
32033 builds better on unusual platforms like Solaris and old OS X, and
32034 fixes a variety of other issues.
32037 - New DirPortFrontPage option that takes an html file and publishes
32038 it as "/" on the DirPort. Now relay operators can provide a
32039 disclaimer without needing to set up a separate webserver. There's
32040 a sample disclaimer in contrib/tor-exit-notice.html.
32043 - When the client is choosing entry guards, now it selects at most
32044 one guard from a given relay family. Otherwise we could end up with
32045 all of our entry points into the network run by the same operator.
32046 Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
32049 - Fix a DOS opportunity during the voting signature collection process
32050 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
32051 - Fix a possible segfault when establishing an exit connection. Bugfix
32055 - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
32057 - Made Tor a little less aggressive about deleting expired
32058 certificates. Partial fix for bug 854.
32059 - Stop doing unaligned memory access that generated bus errors on
32060 sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
32061 - Fix a crash bug when changing EntryNodes from the controller. Bugfix
32062 on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
32063 - Make USR2 log-level switch take effect immediately. Bugfix on
32065 - If one win32 nameserver fails to get added, continue adding the
32066 rest, and don't automatically fail.
32067 - Use fcntl() for locking when flock() is not available. Should fix
32068 compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
32069 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
32070 could make gcc generate non-functional binary search code. Bugfix
32072 - Build correctly on platforms without socklen_t.
32073 - Avoid potential crash on internal error during signature collection.
32074 Fixes bug 864. Patch from rovv.
32075 - Do not use C's stdio library for writing to log files. This will
32076 improve logging performance by a minute amount, and will stop
32077 leaking fds when our disk is full. Fixes bug 861.
32078 - Stop erroneous use of O_APPEND in cases where we did not in fact
32079 want to re-seek to the end of a file before every last write().
32080 - Correct handling of possible malformed authority signing key
32081 certificates with internal signature types. Fixes bug 880. Bugfix
32083 - Fix a hard-to-trigger resource leak when logging credential status.
32087 - Directory mirrors no longer fetch the v1 directory or
32088 running-routers files. They are obsolete, and nobody asks for them
32089 anymore. This is the first step to making v1 authorities obsolete.
32091 o Minor features (controller):
32092 - Return circuit purposes in response to GETINFO circuit-status. Fixes
32096 Changes in version 0.2.0.32 - 2008-11-20
32097 Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
32098 packages (and maybe other packages) noticed by Theo de Raadt, fixes
32099 a smaller security flaw that might allow an attacker to access local
32100 services, further improves hidden service performance, and fixes a
32101 variety of other issues.
32104 - The "User" and "Group" config options did not clear the
32105 supplementary group entries for the Tor process. The "User" option
32106 is now more robust, and we now set the groups to the specified
32107 user's primary group. The "Group" option is now ignored. For more
32108 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
32109 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
32110 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
32111 - The "ClientDNSRejectInternalAddresses" config option wasn't being
32112 consistently obeyed: if an exit relay refuses a stream because its
32113 exit policy doesn't allow it, we would remember what IP address
32114 the relay said the destination address resolves to, even if it's
32115 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
32118 - Fix a DOS opportunity during the voting signature collection process
32119 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
32121 o Major bugfixes (hidden services):
32122 - When fetching v0 and v2 rendezvous service descriptors in parallel,
32123 we were failing the whole hidden service request when the v0
32124 descriptor fetch fails, even if the v2 fetch is still pending and
32125 might succeed. Similarly, if the last v2 fetch fails, we were
32126 failing the whole hidden service request even if a v0 fetch is
32127 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
32128 - When extending a circuit to a hidden service directory to upload a
32129 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
32130 requests failed, because the router descriptor has not been
32131 downloaded yet. In these cases, do not attempt to upload the
32132 rendezvous descriptor, but wait until the router descriptor is
32133 downloaded and retry. Likewise, do not attempt to fetch a rendezvous
32134 descriptor from a hidden service directory for which the router
32135 descriptor has not yet been downloaded. Fixes bug 767. Bugfix
32139 - Fix several infrequent memory leaks spotted by Coverity.
32140 - When testing for libevent functions, set the LDFLAGS variable
32141 correctly. Found by Riastradh.
32142 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
32143 bootstrapping with tunneled directory connections. Bugfix on
32144 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
32145 - When asked to connect to A.B.exit:80, if we don't know the IP for A
32146 and we know that server B rejects most-but-not all connections to
32147 port 80, we would previously reject the connection. Now, we assume
32148 the user knows what they were asking for. Fixes bug 752. Bugfix
32149 on 0.0.9rc5. Diagnosed by BarkerJr.
32150 - If we overrun our per-second write limits a little, count this as
32151 having used up our write allocation for the second, and choke
32152 outgoing directory writes. Previously, we had only counted this when
32153 we had met our limits precisely. Fixes bug 824. Patch from by rovv.
32154 Bugfix on 0.2.0.x (??).
32155 - Remove the old v2 directory authority 'lefkada' from the default
32156 list. It has been gone for many months.
32157 - Stop doing unaligned memory access that generated bus errors on
32158 sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
32159 - Make USR2 log-level switch take effect immediately. Bugfix on
32162 o Minor bugfixes (controller):
32163 - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
32164 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
32167 Changes in version 0.2.1.7-alpha - 2008-11-08
32168 Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
32169 packages (and maybe other packages) noticed by Theo de Raadt, fixes
32170 a smaller security flaw that might allow an attacker to access local
32171 services, adds better defense against DNS poisoning attacks on exit
32172 relays, further improves hidden service performance, and fixes a
32173 variety of other issues.
32176 - The "ClientDNSRejectInternalAddresses" config option wasn't being
32177 consistently obeyed: if an exit relay refuses a stream because its
32178 exit policy doesn't allow it, we would remember what IP address
32179 the relay said the destination address resolves to, even if it's
32180 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
32181 - The "User" and "Group" config options did not clear the
32182 supplementary group entries for the Tor process. The "User" option
32183 is now more robust, and we now set the groups to the specified
32184 user's primary group. The "Group" option is now ignored. For more
32185 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
32186 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
32187 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
32188 - Do not use or believe expired v3 authority certificates. Patch
32189 from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
32192 - Now NodeFamily and MyFamily config options allow spaces in
32193 identity fingerprints, so it's easier to paste them in.
32194 Suggested by Lucky Green.
32195 - Implement the 0x20 hack to better resist DNS poisoning: set the
32196 case on outgoing DNS requests randomly, and reject responses that do
32197 not match the case correctly. This logic can be disabled with the
32198 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
32199 of servers that do not reliably preserve case in replies. See
32200 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
32202 - Preserve case in replies to DNSPort requests in order to support
32203 the 0x20 hack for resisting DNS poisoning attacks.
32205 o Hidden service performance improvements:
32206 - When the client launches an introduction circuit, retry with a
32207 new circuit after 30 seconds rather than 60 seconds.
32208 - Launch a second client-side introduction circuit in parallel
32209 after a delay of 15 seconds (based on work by Christian Wilms).
32210 - Hidden services start out building five intro circuits rather
32211 than three, and when the first three finish they publish a service
32212 descriptor using those. Now we publish our service descriptor much
32213 faster after restart.
32216 - Minor fix in the warning messages when you're having problems
32217 bootstrapping; also, be more forgiving of bootstrap problems when
32218 we're still making incremental progress on a given bootstrap phase.
32219 - When we're choosing an exit node for a circuit, and we have
32220 no pending streams, choose a good general exit rather than one that
32221 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
32222 - Send a valid END cell back when a client tries to connect to a
32223 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
32224 840. Patch from rovv.
32225 - If a broken client asks a non-exit router to connect somewhere,
32226 do not even do the DNS lookup before rejecting the connection.
32227 Fixes another case of bug 619. Patch from rovv.
32228 - Fix another case of assuming, when a specific exit is requested,
32229 that we know more than the user about what hosts it allows.
32230 Fixes another case of bug 752. Patch from rovv.
32231 - Check which hops rendezvous stream cells are associated with to
32232 prevent possible guess-the-streamid injection attacks from
32233 intermediate hops. Fixes another case of bug 446. Based on patch
32235 - Avoid using a negative right-shift when comparing 32-bit
32236 addresses. Possible fix for bug 845 and bug 811.
32237 - Make the assert_circuit_ok() function work correctly on circuits that
32238 have already been marked for close.
32239 - Fix read-off-the-end-of-string error in unit tests when decoding
32240 introduction points.
32241 - Fix uninitialized size field for memory area allocation: may improve
32242 memory performance during directory parsing.
32243 - Treat duplicate certificate fetches as failures, so that we do
32244 not try to re-fetch an expired certificate over and over and over.
32245 - Do not say we're fetching a certificate when we'll in fact skip it
32246 because of a pending download.
32249 Changes in version 0.2.1.6-alpha - 2008-09-30
32250 Tor 0.2.1.6-alpha further improves performance and robustness of
32251 hidden services, starts work on supporting per-country relay selection,
32252 and fixes a variety of smaller issues.
32255 - Implement proposal 121: make it possible to build hidden services
32256 that only certain clients are allowed to connect to. This is
32257 enforced at several points, so that unauthorized clients are unable
32258 to send INTRODUCE cells to the service, or even (depending on the
32259 type of authentication) to learn introduction points. This feature
32260 raises the bar for certain kinds of active attacks against hidden
32261 services. Code by Karsten Loesing.
32262 - Relays now store and serve v2 hidden service descriptors by default,
32263 i.e., the new default value for HidServDirectoryV2 is 1. This is
32264 the last step in proposal 114, which aims to make hidden service
32265 lookups more reliable.
32266 - Start work to allow node restrictions to include country codes. The
32267 syntax to exclude nodes in a country with country code XX is
32268 "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
32269 refinement to decide what config options should take priority if
32270 you ask to both use a particular node and exclude it.
32271 - Allow ExitNodes list to include IP ranges and country codes, just
32272 like the Exclude*Nodes lists. Patch from Robert Hogan.
32275 - Fix a bug when parsing ports in tor_addr_port_parse() that caused
32276 Tor to fail to start if you had it configured to use a bridge
32277 relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
32278 - When extending a circuit to a hidden service directory to upload a
32279 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
32280 requests failed, because the router descriptor had not been
32281 downloaded yet. In these cases, we now wait until the router
32282 descriptor is downloaded, and then retry. Likewise, clients
32283 now skip over a hidden service directory if they don't yet have
32284 its router descriptor, rather than futilely requesting it and
32285 putting mysterious complaints in the logs. Fixes bug 767. Bugfix
32287 - When fetching v0 and v2 rendezvous service descriptors in parallel,
32288 we were failing the whole hidden service request when the v0
32289 descriptor fetch fails, even if the v2 fetch is still pending and
32290 might succeed. Similarly, if the last v2 fetch fails, we were
32291 failing the whole hidden service request even if a v0 fetch is
32292 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
32293 - DNS replies need to have names matching their requests, but
32294 these names should be in the questions section, not necessarily
32295 in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
32298 - Update to the "September 1 2008" ip-to-country file.
32299 - Allow ports 465 and 587 in the default exit policy again. We had
32300 rejected them in 0.1.0.15, because back in 2005 they were commonly
32301 misconfigured and ended up as spam targets. We hear they are better
32302 locked down these days.
32303 - Use a lockfile to make sure that two Tor processes are not
32304 simultaneously running with the same datadir.
32305 - Serve the latest v3 networkstatus consensus via the control
32306 port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
32307 - Better logging about stability/reliability calculations on directory
32309 - Drop the requirement to have an open dir port for storing and
32310 serving v2 hidden service descriptors.
32311 - Directory authorities now serve a /tor/dbg-stability.txt URL to
32312 help debug WFU and MTBF calculations.
32313 - Implement most of Proposal 152: allow specialized servers to permit
32314 single-hop circuits, and clients to use those servers to build
32315 single-hop circuits when using a specialized controller. Patch
32316 from Josh Albrecht. Resolves feature request 768.
32317 - Add a -p option to tor-resolve for specifying the SOCKS port: some
32318 people find host:port too confusing.
32319 - Make TrackHostExit mappings expire a while after their last use, not
32320 after their creation. Patch from Robert Hogan.
32321 - Provide circuit purposes along with circuit events to the controller.
32324 - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
32326 - Fixed some memory leaks -- some quite frequent, some almost
32327 impossible to trigger -- based on results from Coverity.
32328 - When testing for libevent functions, set the LDFLAGS variable
32329 correctly. Found by Riastradh.
32330 - Fix an assertion bug in parsing policy-related options; possible fix
32332 - Catch and report a few more bootstrapping failure cases when Tor
32333 fails to establish a TCP connection. Cleanup on 0.2.1.x.
32334 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
32335 bootstrapping with tunneled directory connections. Bugfix on
32336 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
32337 - When asked to connect to A.B.exit:80, if we don't know the IP for A
32338 and we know that server B rejects most-but-not all connections to
32339 port 80, we would previously reject the connection. Now, we assume
32340 the user knows what they were asking for. Fixes bug 752. Bugfix
32341 on 0.0.9rc5. Diagnosed by BarkerJr.
32342 - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
32343 service directories if they have no advertised dir port. Bugfix
32345 - If we overrun our per-second write limits a little, count this as
32346 having used up our write allocation for the second, and choke
32347 outgoing directory writes. Previously, we had only counted this when
32348 we had met our limits precisely. Fixes bug 824. Patch by rovv.
32349 Bugfix on 0.2.0.x (??).
32350 - Avoid a "0 divided by 0" calculation when calculating router uptime
32351 at directory authorities. Bugfix on 0.2.0.8-alpha.
32352 - Make DNS resolved controller events into "CLOSED", not
32353 "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
32355 - Fix a bug where an unreachable relay would establish enough
32356 reachability testing circuits to do a bandwidth test -- if
32357 we already have a connection to the middle hop of the testing
32358 circuit, then it could establish the last hop by using the existing
32359 connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
32360 circuits no longer use entry guards in 0.2.1.3-alpha.
32361 - If we have correct permissions on $datadir, we complain to stdout
32362 and fail to start. But dangerous permissions on
32363 $datadir/cached-status/ would cause us to open a log and complain
32364 there. Now complain to stdout and fail to start in both cases. Fixes
32365 bug 820, reported by seeess.
32366 - Remove the old v2 directory authority 'lefkada' from the default
32367 list. It has been gone for many months.
32369 o Code simplifications and refactoring:
32370 - Revise the connection_new functions so that a more typesafe variant
32371 exists. This will work better with Coverity, and let us find any
32372 actual mistakes we're making here.
32373 - Refactor unit testing logic so that dmalloc can be used sensibly
32374 with unit tests to check for memory leaks.
32375 - Move all hidden-service related fields from connection and circuit
32376 structure to substructures: this way they won't eat so much memory.
32379 Changes in version 0.2.0.31 - 2008-09-03
32380 Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
32381 a big bug we're seeing where in rare cases traffic from one Tor stream
32382 gets mixed into another stream, and fixes a variety of smaller issues.
32385 - Make sure that two circuits can never exist on the same connection
32386 with the same circuit ID, even if one is marked for close. This
32387 is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
32388 - Relays now reject risky extend cells: if the extend cell includes
32389 a digest of all zeroes, or asks to extend back to the relay that
32390 sent the extend cell, tear down the circuit. Ideas suggested
32392 - If not enough of our entry guards are available so we add a new
32393 one, we might use the new one even if it overlapped with the
32394 current circuit's exit relay (or its family). Anonymity bugfix
32395 pointed out by rovv.
32398 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
32399 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
32400 - Correctly detect the presence of the linux/netfilter_ipv4.h header
32401 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
32402 - Pick size of default geoip filename string correctly on windows.
32403 Fixes bug 806. Bugfix on 0.2.0.30.
32404 - Make the autoconf script accept the obsolete --with-ssl-dir
32405 option as an alias for the actually-working --with-openssl-dir
32406 option. Fix the help documentation to recommend --with-openssl-dir.
32407 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
32408 - When using the TransPort option on OpenBSD, and using the User
32409 option to change UID and drop privileges, make sure to open
32410 /dev/pf before dropping privileges. Fixes bug 782. Patch from
32411 Christopher Davis. Bugfix on 0.1.2.1-alpha.
32412 - Try to attach connections immediately upon receiving a RENDEZVOUS2
32413 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
32414 on the client side when connecting to a hidden service. Bugfix
32415 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
32416 - When closing an application-side connection because its circuit is
32417 getting torn down, generate the stream event correctly. Bugfix on
32418 0.1.2.x. Anonymous patch.
32421 Changes in version 0.2.1.5-alpha - 2008-08-31
32422 Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
32423 in a lot of the infrastructure for adding authorization to hidden
32424 services, lays the groundwork for having clients read their load
32425 balancing information out of the networkstatus consensus rather than
32426 the individual router descriptors, addresses two potential anonymity
32427 issues, and fixes a variety of smaller issues.
32430 - Convert many internal address representations to optionally hold
32432 - Generate and accept IPv6 addresses in many protocol elements.
32433 - Make resolver code handle nameservers located at ipv6 addresses.
32434 - Begin implementation of proposal 121 ("Client authorization for
32435 hidden services"): configure hidden services with client
32436 authorization, publish descriptors for them, and configure
32437 authorization data for hidden services at clients. The next
32438 step is to actually access hidden services that perform client
32440 - More progress toward proposal 141: Network status consensus
32441 documents and votes now contain bandwidth information for each
32442 router and a summary of that router's exit policy. Eventually this
32443 will be used by clients so that they do not have to download every
32444 known descriptor before building circuits.
32446 o Major bugfixes (on 0.2.0.x and before):
32447 - When sending CREATED cells back for a given circuit, use a 64-bit
32448 connection ID to find the right connection, rather than an addr:port
32449 combination. Now that we can have multiple OR connections between
32450 the same ORs, it is no longer possible to use addr:port to uniquely
32451 identify a connection.
32452 - Relays now reject risky extend cells: if the extend cell includes
32453 a digest of all zeroes, or asks to extend back to the relay that
32454 sent the extend cell, tear down the circuit. Ideas suggested
32456 - If not enough of our entry guards are available so we add a new
32457 one, we might use the new one even if it overlapped with the
32458 current circuit's exit relay (or its family). Anonymity bugfix
32459 pointed out by rovv.
32462 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
32463 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
32464 - When using the TransPort option on OpenBSD, and using the User
32465 option to change UID and drop privileges, make sure to open /dev/pf
32466 before dropping privileges. Fixes bug 782. Patch from Christopher
32467 Davis. Bugfix on 0.1.2.1-alpha.
32468 - Correctly detect the presence of the linux/netfilter_ipv4.h header
32469 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
32470 - Add a missing safe_str() call for a debug log message.
32471 - Use 64 bits instead of 32 bits for connection identifiers used with
32472 the controller protocol, to greatly reduce risk of identifier reuse.
32473 - Make the autoconf script accept the obsolete --with-ssl-dir
32474 option as an alias for the actually-working --with-openssl-dir
32475 option. Fix the help documentation to recommend --with-openssl-dir.
32476 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
32479 - Rate-limit too-many-sockets messages: when they happen, they happen
32480 a lot. Resolves bug 748.
32481 - Resist DNS poisoning a little better by making sure that names in
32482 answer sections match.
32483 - Print the SOCKS5 error message string as well as the error code
32484 when a tor-resolve request fails. Patch from Jacob.
32487 Changes in version 0.2.1.4-alpha - 2008-08-04
32488 Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
32491 - The address part of exit policies was not correctly written
32492 to router descriptors. This generated router descriptors that failed
32493 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
32495 - Tor triggered a false assert when extending a circuit to a relay
32496 but we already have a connection open to that relay. Noticed by
32497 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
32500 - Fix a hidden service logging bug: in some edge cases, the router
32501 descriptor of a previously picked introduction point becomes
32502 obsolete and we need to give up on it rather than continually
32503 complaining that it has become obsolete. Observed by xiando. Bugfix
32506 o Removed features:
32507 - Take out the TestVia config option, since it was a workaround for
32508 a bug that was fixed in Tor 0.1.1.21.
32511 Changes in version 0.2.1.3-alpha - 2008-08-03
32512 Tor 0.2.1.3-alpha implements most of the pieces to prevent
32513 infinite-length circuit attacks (see proposal 110); fixes a bug that
32514 might cause exit relays to corrupt streams they send back; allows
32515 address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
32516 ExcludeExitNodes config options; and fixes a big pile of bugs.
32518 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
32519 - Send a bootstrap problem "warn" event on the first problem if the
32520 reason is NO_ROUTE (that is, our network is down).
32523 - Implement most of proposal 110: The first K cells to be sent
32524 along a circuit are marked as special "early" cells; only K "early"
32525 cells will be allowed. Once this code is universal, we can block
32526 certain kinds of DOS attack by requiring that EXTEND commands must
32527 be sent using an "early" cell.
32530 - Try to attach connections immediately upon receiving a RENDEZVOUS2
32531 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
32532 on the client side when connecting to a hidden service. Bugfix
32533 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
32534 - Ensure that two circuits can never exist on the same connection
32535 with the same circuit ID, even if one is marked for close. This
32536 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
32539 - When relays do their initial bandwidth measurement, don't limit
32540 to just our entry guards for the test circuits. Otherwise we tend
32541 to have multiple test circuits going through a single entry guard,
32542 which makes our bandwidth test less accurate. Fixes part of bug 654;
32543 patch contributed by Josh Albrecht.
32544 - Add an ExcludeExitNodes option so users can list a set of nodes
32545 that should be be excluded from the exit node position, but
32546 allowed elsewhere. Implements proposal 151.
32547 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
32548 ExcludeNodes and ExcludeExitNodes lists.
32549 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
32550 be more efficient. Formerly it was quadratic in the number of
32551 servers; now it should be linear. Fixes bug 509.
32552 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
32553 and n_conn_id_digest fields into a separate structure that's
32554 only needed when the circuit has not yet attached to an n_conn.
32557 - Change the contrib/tor.logrotate script so it makes the new
32558 logs as "_tor:_tor" rather than the default, which is generally
32559 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
32560 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
32561 warnings (occasionally), but it can also cause the compiler to
32562 eliminate error-checking code. Suggested by Peter Gutmann.
32563 - When a hidden service is giving up on an introduction point candidate
32564 that was not included in the last published rendezvous descriptor,
32565 don't reschedule publication of the next descriptor. Fixes bug 763.
32567 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
32568 HiddenServiceExcludeNodes as obsolete: they never worked properly,
32569 and nobody claims to be using them. Fixes bug 754. Bugfix on
32570 0.1.0.1-rc. Patch from Christian Wilms.
32571 - Fix a small alignment and memory-wasting bug on buffer chunks.
32574 o Minor bugfixes (controller):
32575 - When closing an application-side connection because its circuit
32576 is getting torn down, generate the stream event correctly.
32577 Bugfix on 0.1.2.x. Anonymous patch.
32579 o Removed features:
32580 - Remove all backward-compatibility code to support relays running
32581 versions of Tor so old that they no longer work at all on the
32585 Changes in version 0.2.0.30 - 2008-07-15
32587 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
32588 warnings (occasionally), but it can also cause the compiler to
32589 eliminate error-checking code. Suggested by Peter Gutmann.
32592 Changes in version 0.2.0.29-rc - 2008-07-08
32593 Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
32594 hidden-service performance bugs, and fixes a bunch of smaller bugs.
32597 - If you have more than one bridge but don't know their keys,
32598 you would only launch a request for the descriptor of the first one
32599 on your list. (Tor considered launching requests for the others, but
32600 found that it already had a connection on the way for $0000...0000
32601 so it didn't open another.) Bugfix on 0.2.0.x.
32602 - If you have more than one bridge but don't know their keys, and the
32603 connection to one of the bridges failed, you would cancel all
32604 pending bridge connections. (After all, they all have the same
32605 digest.) Bugfix on 0.2.0.x.
32606 - When a hidden service was trying to establish an introduction point,
32607 and Tor had built circuits preemptively for such purposes, we
32608 were ignoring all the preemptive circuits and launching a new one
32609 instead. Bugfix on 0.2.0.14-alpha.
32610 - When a hidden service was trying to establish an introduction point,
32611 and Tor *did* manage to reuse one of the preemptively built
32612 circuits, it didn't correctly remember which one it used,
32613 so it asked for another one soon after, until there were no
32614 more preemptive circuits, at which point it launched one from
32615 scratch. Bugfix on 0.0.9.x.
32616 - Make directory servers include the X-Your-Address-Is: http header in
32617 their responses even for begin_dir conns. Now clients who only
32618 ever use begin_dir connections still have a way to learn their IP
32619 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
32622 - Fix a macro/CPP interaction that was confusing some compilers:
32623 some GCCs don't like #if/#endif pairs inside macro arguments.
32625 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
32626 Fixes bug 704; fix from Steven Murdoch.
32627 - When opening /dev/null in finish_daemonize(), do not pass the
32628 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
32629 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
32630 - Correctly detect transparent proxy support on Linux hosts that
32631 require in.h to be included before netfilter_ipv4.h. Patch
32633 - Disallow session resumption attempts during the renegotiation
32634 stage of the v2 handshake protocol. Clients should never be trying
32635 session resumption at this point, but apparently some did, in
32636 ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
32637 found by Geoff Goodell.
32640 Changes in version 0.2.1.2-alpha - 2008-06-20
32641 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
32642 make it easier to set up your own private Tor network; fixes several
32643 big bugs with using more than one bridge relay; fixes a big bug with
32644 offering hidden services quickly after Tor starts; and uses a better
32645 API for reporting potential bootstrapping problems to the controller.
32648 - New TestingTorNetwork config option to allow adjustment of
32649 previously constant values that, while reasonable, could slow
32650 bootstrapping. Implements proposal 135. Patch from Karsten.
32653 - If you have more than one bridge but don't know their digests,
32654 you would only learn a request for the descriptor of the first one
32655 on your list. (Tor considered launching requests for the others, but
32656 found that it already had a connection on the way for $0000...0000
32657 so it didn't open another.) Bugfix on 0.2.0.x.
32658 - If you have more than one bridge but don't know their digests,
32659 and the connection to one of the bridges failed, you would cancel
32660 all pending bridge connections. (After all, they all have the
32661 same digest.) Bugfix on 0.2.0.x.
32662 - When establishing a hidden service, introduction points that
32663 originate from cannibalized circuits are completely ignored and not
32664 included in rendezvous service descriptors. This might be another
32665 reason for delay in making a hidden service available. Bugfix
32666 from long ago (0.0.9.x?)
32669 - Allow OpenSSL to use dynamic locks if it wants.
32670 - When building a consensus, do not include routers that are down.
32671 This will cut down 30% to 40% on consensus size. Implements
32673 - In directory authorities' approved-routers files, allow
32674 fingerprints with or without space.
32675 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
32676 controller can query our current bootstrap state in case it attaches
32677 partway through and wants to catch up.
32678 - Send an initial "Starting" bootstrap status event, so we have a
32679 state to start out in.
32682 - Asking for a conditional consensus at .../consensus/<fingerprints>
32683 would crash a dirserver if it did not already have a
32684 consensus. Bugfix on 0.2.1.1-alpha.
32685 - Clean up some macro/CPP interactions: some GCC versions don't like
32686 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
32689 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
32690 - Directory authorities shouldn't complain about bootstrapping
32691 problems just because they do a lot of reachability testing and
32692 some of the connection attempts fail.
32693 - Start sending "count" and "recommendation" key/value pairs in
32694 bootstrap problem status events, so the controller can hear about
32695 problems even before Tor decides they're worth reporting for sure.
32696 - If you're using bridges, generate "bootstrap problem" warnings
32697 as soon as you run out of working bridges, rather than waiting
32698 for ten failures -- which will never happen if you have less than
32700 - If we close our OR connection because there's been a circuit
32701 pending on it for too long, we were telling our bootstrap status
32702 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
32705 Changes in version 0.2.1.1-alpha - 2008-06-13
32706 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
32707 were making the Tor process bloat especially on Linux; makes our TLS
32708 handshake blend in better; sends "bootstrap phase" status events to
32709 the controller, so it can keep the user informed of progress (and
32710 problems) fetching directory information and establishing circuits;
32711 and adds a variety of smaller features.
32714 - More work on making our TLS handshake blend in: modify the list
32715 of ciphers advertised by OpenSSL in client mode to even more
32716 closely resemble a common web browser. We cheat a little so that
32717 we can advertise ciphers that the locally installed OpenSSL doesn't
32719 - Start sending "bootstrap phase" status events to the controller,
32720 so it can keep the user informed of progress fetching directory
32721 information and establishing circuits. Also inform the controller
32722 if we think we're stuck at a particular bootstrap phase. Implements
32724 - Resume using OpenSSL's RAND_poll() for better (and more portable)
32725 cross-platform entropy collection again. We used to use it, then
32726 stopped using it because of a bug that could crash systems that
32727 called RAND_poll when they had a lot of fds open. It looks like the
32728 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
32729 at startup, and to call RAND_poll() when we reseed later only if
32730 we have a non-buggy OpenSSL version.
32733 - When we choose to abandon a new entry guard because we think our
32734 older ones might be better, close any circuits pending on that
32735 new entry guard connection. This fix should make us recover much
32736 faster when our network is down and then comes back. Bugfix on
32737 0.1.2.8-beta; found by lodger.
32739 o Memory fixes and improvements:
32740 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
32741 to avoid unused RAM in buffer chunks and memory pools.
32742 - Speed up parsing and cut down on memory fragmentation by using
32743 stack-style allocations for parsing directory objects. Previously,
32744 this accounted for over 40% of allocations from within Tor's code
32745 on a typical directory cache.
32746 - Use a Bloom filter rather than a digest-based set to track which
32747 descriptors we need to keep around when we're cleaning out old
32748 router descriptors. This speeds up the computation significantly,
32749 and may reduce fragmentation.
32750 - Reduce the default smartlist size from 32 to 16; it turns out that
32751 most smartlists hold around 8-12 elements tops.
32752 - Make dumpstats() log the fullness and size of openssl-internal
32754 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
32755 patch to their OpenSSL, turn it on to save memory on servers. This
32756 patch will (with any luck) get included in a mainline distribution
32758 - Never use OpenSSL compression: it wastes RAM and CPU trying to
32759 compress cells, which are basically all encrypted, compressed,
32763 - Stop reloading the router list from disk for no reason when we
32764 run out of reachable directory mirrors. Once upon a time reloading
32765 it would set the 'is_running' flag back to 1 for them. It hasn't
32766 done that for a long time.
32767 - In very rare situations new hidden service descriptors were
32768 published earlier than 30 seconds after the last change to the
32769 service. (We currently think that a hidden service descriptor
32770 that's been stable for 30 seconds is worth publishing.)
32773 - Allow separate log levels to be configured for different logging
32774 domains. For example, this allows one to log all notices, warnings,
32775 or errors, plus all memory management messages of level debug or
32776 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
32777 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
32778 and stop using a warning that had become unfixably verbose under
32780 - New --hush command-line option similar to --quiet. While --quiet
32781 disables all logging to the console on startup, --hush limits the
32782 output to messages of warning and error severity.
32783 - Servers support a new URL scheme for consensus downloads that
32784 allows the client to specify which authorities are trusted.
32785 The server then only sends the consensus if the client will trust
32786 it. Otherwise a 404 error is sent back. Clients use this
32787 new scheme when the server supports it (meaning it's running
32788 0.2.1.1-alpha or later). Implements proposal 134.
32789 - New configure/torrc options (--enable-geoip-stats,
32790 DirRecordUsageByCountry) to record how many IPs we've served
32791 directory info to in each country code, how many status documents
32792 total we've sent to each country code, and what share of the total
32793 directory requests we should expect to see.
32794 - Use the TLS1 hostname extension to more closely resemble browser
32796 - Lots of new unit tests.
32797 - Add a macro to implement the common pattern of iterating through
32798 two parallel lists in lockstep.
32801 Changes in version 0.2.0.28-rc - 2008-06-13
32802 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
32803 performance bug, and fixes a bunch of smaller bugs.
32806 - Fix a bug where, when we were choosing the 'end stream reason' to
32807 put in our relay end cell that we send to the exit relay, Tor
32808 clients on Windows were sometimes sending the wrong 'reason'. The
32809 anonymity problem is that exit relays may be able to guess whether
32810 the client is running Windows, thus helping partition the anonymity
32811 set. Down the road we should stop sending reasons to exit relays,
32812 or otherwise prevent future versions of this bug.
32815 - While setting up a hidden service, some valid introduction circuits
32816 were overlooked and abandoned. This might be the reason for
32817 the long delay in making a hidden service available. Bugfix on
32821 - Update to the "June 9 2008" ip-to-country file.
32822 - Run 'make test' as part of 'make dist', so we stop releasing so
32823 many development snapshots that fail their unit tests.
32826 - When we're checking if we have enough dir info for each relay
32827 to begin establishing circuits, make sure that we actually have
32828 the descriptor listed in the consensus, not just any descriptor.
32830 - Bridge relays no longer print "xx=0" in their extrainfo document
32831 for every single country code in the geoip db. Bugfix on
32833 - Only warn when we fail to load the geoip file if we were planning to
32834 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
32835 - If we change our MaxAdvertisedBandwidth and then reload torrc,
32836 Tor won't realize it should publish a new relay descriptor. Fixes
32837 bug 688, reported by mfr. Bugfix on 0.1.2.x.
32838 - When we haven't had any application requests lately, don't bother
32839 logging that we have expired a bunch of descriptors. Bugfix
32841 - Make relay cells written on a connection count as non-padding when
32842 tracking how long a connection has been in use. Bugfix on
32843 0.2.0.1-alpha. Spotted by lodger.
32844 - Fix unit tests in 0.2.0.27-rc.
32845 - Fix compile on Windows.
32848 Changes in version 0.2.0.27-rc - 2008-06-03
32849 Tor 0.2.0.27-rc adds a few features we left out of the earlier
32850 release candidates. In particular, we now include an IP-to-country
32851 GeoIP database, so controllers can easily look up what country a
32852 given relay is in, and so bridge relays can give us some sanitized
32853 summaries about which countries are making use of bridges. (See proposal
32854 126-geoip-fetching.txt for details.)
32857 - Include an IP-to-country GeoIP file in the tarball, so bridge
32858 relays can report sanitized summaries of the usage they're seeing.
32861 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
32862 Robert Hogan. Fixes the first part of bug 681.
32863 - Make bridge authorities never serve extrainfo docs.
32864 - Add support to detect Libevent versions in the 1.4.x series
32866 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
32867 - Include a new contrib/tor-exit-notice.html file that exit relay
32868 operators can put on their website to help reduce abuse queries.
32871 - When tunneling an encrypted directory connection, and its first
32872 circuit fails, do not leave it unattached and ask the controller
32873 to deal. Fixes the second part of bug 681.
32874 - Make bridge authorities correctly expire old extrainfo documents
32878 Changes in version 0.2.0.26-rc - 2008-05-13
32879 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
32880 in Debian's OpenSSL packages. All users running any 0.2.0.x version
32881 should upgrade, whether they're running Debian or not.
32883 o Major security fixes:
32884 - Use new V3 directory authority keys on the tor26, gabelmoo, and
32885 moria1 V3 directory authorities. The old keys were generated with
32886 a vulnerable version of Debian's OpenSSL package, and must be
32887 considered compromised. Other authorities' keys were not generated
32888 with an affected version of OpenSSL.
32891 - List authority signatures as "unrecognized" based on DirServer
32892 lines, not on cert cache. Bugfix on 0.2.0.x.
32895 - Add a new V3AuthUseLegacyKey option to make it easier for
32896 authorities to change their identity keys if they have to.
32899 Changes in version 0.2.0.25-rc - 2008-04-23
32900 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
32903 - Remember to initialize threading before initializing logging.
32904 Otherwise, many BSD-family implementations will crash hard on
32905 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
32908 - Authorities correctly free policies on bad servers on
32909 exit. Fixes bug 672. Bugfix on 0.2.0.x.
32912 Changes in version 0.2.0.24-rc - 2008-04-22
32913 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
32914 v3 directory authority, makes relays with dynamic IP addresses and no
32915 DirPort notice more quickly when their IP address changes, fixes a few
32916 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
32918 o New directory authorities:
32919 - Take lefkada out of the list of v3 directory authorities, since
32920 it has been down for months.
32921 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
32925 - Detect address changes more quickly on non-directory mirror
32926 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
32928 o Minor features (security):
32929 - Reject requests for reverse-dns lookup of names that are in
32930 a private address space. Patch from lodger.
32931 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
32934 o Minor bugfixes (crashes):
32935 - Avoid a rare assert that can trigger when Tor doesn't have much
32936 directory information yet and it tries to fetch a v2 hidden
32937 service descriptor. Fixes bug 651, reported by nwf.
32938 - Initialize log mutex before initializing dmalloc. Otherwise,
32939 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
32940 - Use recursive pthread mutexes in order to avoid deadlock when
32941 logging debug-level messages to a controller. Bug spotted by nwf,
32942 bugfix on 0.2.0.16-alpha.
32944 o Minor bugfixes (resource management):
32945 - Keep address policies from leaking memory: start their refcount
32946 at 1, not 2. Bugfix on 0.2.0.16-alpha.
32947 - Free authority certificates on exit, so they don't look like memory
32948 leaks. Bugfix on 0.2.0.19-alpha.
32949 - Free static hashtables for policy maps and for TLS connections on
32950 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
32951 - Avoid allocating extra space when computing consensuses on 64-bit
32952 platforms. Bug spotted by aakova.
32954 o Minor bugfixes (misc):
32955 - Do not read the configuration file when we've only been told to
32956 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
32957 based on patch from Sebastian Hahn.
32958 - Exit relays that are used as a client can now reach themselves
32959 using the .exit notation, rather than just launching an infinite
32960 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
32961 - When attempting to open a logfile fails, tell us why.
32962 - Fix a dumb bug that was preventing us from knowing that we should
32963 preemptively build circuits to handle expected directory requests.
32964 Fixes bug 660. Bugfix on 0.1.2.x.
32965 - Warn less verbosely about clock skew from netinfo cells from
32966 untrusted sources. Fixes bug 663.
32967 - Make controller stream events for DNS requests more consistent,
32968 by adding "new stream" events for DNS requests, and removing
32969 spurious "stream closed" events" for cached reverse resolves.
32970 Patch from mwenge. Fixes bug 646.
32971 - Correctly notify one-hop connections when a circuit build has
32972 failed. Possible fix for bug 669. Found by lodger.
32975 Changes in version 0.2.0.23-rc - 2008-03-24
32976 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
32977 makes bootstrapping faster if the first directory mirror you contact
32978 is down. The bundles also include the new Vidalia 0.1.2 release.
32981 - When a tunneled directory request is made to a directory server
32982 that's down, notice after 30 seconds rather than 120 seconds. Also,
32983 fail any begindir streams that are pending on it, so they can
32984 retry elsewhere. This was causing multi-minute delays on bootstrap.
32987 Changes in version 0.2.0.22-rc - 2008-03-18
32988 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
32989 enables encrypted directory connections by default for non-relays, fixes
32990 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
32991 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
32994 - Enable encrypted directory connections by default for non-relays,
32995 so censor tools that block Tor directory connections based on their
32996 plaintext patterns will no longer work. This means Tor works in
32997 certain censored countries by default again.
33000 - Make sure servers always request certificates from clients during
33001 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
33002 - Do not enter a CPU-eating loop when a connection is closed in
33003 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
33004 diagnosed by lodger; bugfix on 0.2.0.20-rc.
33005 - Fix assertion failure that could occur when a blocked circuit
33006 became unblocked, and it had pending client DNS requests. Bugfix
33007 on 0.2.0.1-alpha. Fixes bug 632.
33009 o Minor bugfixes (on 0.1.2.x):
33010 - Generate "STATUS_SERVER" events rather than misspelled
33011 "STATUS_SEVER" events. Caught by mwenge.
33012 - When counting the number of bytes written on a TLS connection,
33013 look at the BIO actually used for writing to the network, not
33014 at the BIO used (sometimes) to buffer data for the network.
33015 Looking at different BIOs could result in write counts on the
33016 order of ULONG_MAX. Fixes bug 614.
33017 - On Windows, correctly detect errors when listing the contents of
33018 a directory. Fix from lodger.
33020 o Minor bugfixes (on 0.2.0.x):
33021 - Downgrade "sslv3 alert handshake failure" message to INFO.
33022 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
33023 left BandwidthRate and BandwidthBurst at the default, we would be
33024 silently limited by those defaults. Now raise them to match the
33025 RelayBandwidth* values.
33026 - Fix the SVK version detection logic to work correctly on a branch.
33027 - Make --enable-openbsd-malloc work correctly on Linux with alpha
33028 CPUs. Fixes bug 625.
33029 - Logging functions now check that the passed severity is sane.
33030 - Use proper log levels in the testsuite call of
33031 get_interface_address6().
33032 - When using a nonstandard malloc, do not use the platform values for
33033 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
33034 - Make the openbsd malloc code use 8k pages on alpha CPUs and
33036 - Detect mismatched page sizes when using --enable-openbsd-malloc.
33037 - Avoid double-marked-for-close warning when certain kinds of invalid
33038 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
33039 for bug 617. Bugfix on 0.2.0.1-alpha.
33040 - Make sure that the "NULL-means-reject *:*" convention is followed by
33041 all the policy manipulation functions, avoiding some possible crash
33042 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
33043 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
33044 actually works, and doesn't warn about every single reverse lookup.
33045 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
33048 - Only log guard node status when guard node status has changed.
33049 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
33050 make "INFO" 75% less verbose.
33053 Changes in version 0.2.0.21-rc - 2008-03-02
33054 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
33055 makes Tor work well with Vidalia again, fixes a rare assert bug,
33056 and fixes a pair of more minor bugs. The bundles also include Vidalia
33057 0.1.0 and Torbutton 1.1.16.
33060 - The control port should declare that it requires password auth
33061 when HashedControlSessionPassword is set too. Patch from Matt Edman;
33062 bugfix on 0.2.0.20-rc. Fixes bug 615.
33063 - Downgrade assert in connection_buckets_decrement() to a log message.
33064 This may help us solve bug 614, and in any case will make its
33065 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
33066 - We were sometimes miscounting the number of bytes read from the
33067 network, causing our rate limiting to not be followed exactly.
33068 Bugfix on 0.2.0.16-alpha. Reported by lodger.
33071 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
33072 OpenSSL versions should have been working fine. Diagnosis and patch
33073 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
33074 Bugfix on 0.2.0.20-rc.
33077 Changes in version 0.2.0.20-rc - 2008-02-24
33078 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
33079 makes more progress towards normalizing Tor's TLS handshake, makes
33080 hidden services work better again, helps relays bootstrap if they don't
33081 know their IP address, adds optional support for linking in openbsd's
33082 allocator or tcmalloc, allows really fast relays to scale past 15000
33083 sockets, and fixes a bunch of minor bugs reported by Veracode.
33086 - Enable the revised TLS handshake based on the one designed by
33087 Steven Murdoch in proposal 124, as revised in proposal 130. It
33088 includes version negotiation for OR connections as described in
33089 proposal 105. The new handshake is meant to be harder for censors
33090 to fingerprint, and it adds the ability to detect certain kinds of
33091 man-in-the-middle traffic analysis attacks. The version negotiation
33092 feature will allow us to improve Tor's link protocol more safely
33094 - Choose which bridge to use proportional to its advertised bandwidth,
33095 rather than uniformly at random. This should speed up Tor for
33096 bridge users. Also do this for people who set StrictEntryNodes.
33097 - When a TrackHostExits-chosen exit fails too many times in a row,
33098 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
33101 - Resolved problems with (re-)fetching hidden service descriptors.
33102 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
33103 and 0.2.0.19-alpha.
33104 - If we only ever used Tor for hidden service lookups or posts, we
33105 would stop building circuits and start refusing connections after
33106 24 hours, since we falsely believed that Tor was dormant. Reported
33107 by nwf; bugfix on 0.1.2.x.
33108 - Servers that don't know their own IP address should go to the
33109 authorities for their first directory fetch, even if their DirPort
33110 is off or if they don't know they're reachable yet. This will help
33111 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
33112 - When counting the number of open sockets, count not only the number
33113 of sockets we have received from the socket() call, but also
33114 the number we've gotten from accept() and socketpair(). This bug
33115 made us fail to count all sockets that we were using for incoming
33116 connections. Bugfix on 0.2.0.x.
33117 - Fix code used to find strings within buffers, when those strings
33118 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
33119 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
33120 - Add a new __HashedControlSessionPassword option for controllers
33121 to use for one-off session password hashes that shouldn't get
33122 saved to disk by SAVECONF --- Vidalia users were accumulating a
33123 pile of HashedControlPassword lines in their torrc files, one for
33124 each time they had restarted Tor and then clicked Save. Make Tor
33125 automatically convert "HashedControlPassword" to this new option but
33126 only when it's given on the command line. Partial fix for bug 586.
33128 o Minor features (performance):
33129 - Tune parameters for cell pool allocation to minimize amount of
33131 - Add OpenBSD malloc code from phk as an optional malloc
33132 replacement on Linux: some glibc libraries do very poorly
33133 with Tor's memory allocation patterns. Pass
33134 --enable-openbsd-malloc to get the replacement malloc code.
33135 - Add a --with-tcmalloc option to the configure script to link
33136 against tcmalloc (if present). Does not yet search for
33137 non-system include paths.
33138 - Stop imposing an arbitrary maximum on the number of file descriptors
33139 used for busy servers. Bug reported by Olaf Selke; patch from
33142 o Minor features (other):
33143 - When SafeLogging is disabled, log addresses along with all TLS
33145 - When building with --enable-gcc-warnings, check for whether Apple's
33146 warning "-Wshorten-64-to-32" is available.
33147 - Add a --passphrase-fd argument to the tor-gencert command for
33150 o Minor bugfixes (memory leaks and code problems):
33151 - We were leaking a file descriptor if Tor started with a zero-length
33152 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
33153 - Detect size overflow in zlib code. Reported by Justin Ferguson and
33155 - We were comparing the raw BridgePassword entry with a base64'ed
33156 version of it, when handling a "/tor/networkstatus-bridges"
33157 directory request. Now compare correctly. Noticed by Veracode.
33158 - Recover from bad tracked-since value in MTBF-history file.
33159 Should fix bug 537.
33160 - Alter the code that tries to recover from unhandled write
33161 errors, to not try to flush onto a socket that's given us
33162 unhandled errors. Bugfix on 0.1.2.x.
33163 - Make Unix controlsockets work correctly on OpenBSD. Patch from
33164 tup. Bugfix on 0.2.0.3-alpha.
33166 o Minor bugfixes (other):
33167 - If we have an extra-info document for our server, always make
33168 it available on the control port, even if we haven't gotten
33169 a copy of it from an authority yet. Patch from mwenge.
33170 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
33171 - Directory mirrors no longer include a guess at the client's IP
33172 address if the connection appears to be coming from the same /24
33173 network; it was producing too many wrong guesses.
33174 - Make the new hidden service code respect the SafeLogging setting.
33175 Bugfix on 0.2.0.x. Patch from Karsten.
33176 - When starting as an authority, do not overwrite all certificates
33177 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
33178 - If we're trying to flush the last bytes on a connection (for
33179 example, when answering a directory request), reset the
33180 time-to-give-up timeout every time we manage to write something
33181 on the socket. Bugfix on 0.1.2.x.
33182 - Change the behavior of "getinfo status/good-server-descriptor"
33183 so it doesn't return failure when any authority disappears.
33184 - Even though the man page said that "TrackHostExits ." should
33185 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
33186 - Report TLS "zero return" case as a "clean close" and "IO error"
33187 as a "close". Stop calling closes "unexpected closes": existing
33188 Tors don't use SSL_close(), so having a connection close without
33189 the TLS shutdown handshake is hardly unexpected.
33190 - Send NAMESERVER_STATUS messages for a single failed nameserver
33193 o Code simplifications and refactoring:
33194 - Remove the tor_strpartition function: its logic was confused,
33195 and it was only used for one thing that could be implemented far
33199 Changes in version 0.2.0.19-alpha - 2008-02-09
33200 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
33201 handshake, makes path selection for relays more secure and IP address
33202 guessing more robust, and generally fixes a lot of bugs in preparation
33203 for calling the 0.2.0 branch stable.
33206 - Do not include recognizeable strings in the commonname part of
33207 Tor's x509 certificates.
33210 - If we're a relay, avoid picking ourselves as an introduction point,
33211 a rendezvous point, or as the final hop for internal circuits. Bug
33212 reported by taranis and lodger. Bugfix on 0.1.2.x.
33213 - Patch from "Andrew S. Lists" to catch when we contact a directory
33214 mirror at IP address X and he says we look like we're coming from
33215 IP address X. Bugfix on 0.1.2.x.
33217 o Minor features (security):
33218 - Be more paranoid about overwriting sensitive memory on free(),
33219 as a defensive programming tactic to ensure forward secrecy.
33221 o Minor features (directory authority):
33222 - Actually validate the options passed to AuthDirReject,
33223 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
33224 - Reject router descriptors with out-of-range bandwidthcapacity or
33225 bandwidthburst values.
33227 o Minor features (controller):
33228 - Reject controller commands over 1MB in length. This keeps rogue
33229 processes from running us out of memory.
33231 o Minor features (misc):
33232 - Give more descriptive well-formedness errors for out-of-range
33233 hidden service descriptor/protocol versions.
33234 - Make memory debugging information describe more about history
33235 of cell allocation, so we can help reduce our memory use.
33237 o Deprecated features (controller):
33238 - The status/version/num-versioning and status/version/num-concurring
33239 GETINFO options are no longer useful in the v3 directory protocol:
33240 treat them as deprecated, and warn when they're used.
33243 - When our consensus networkstatus has been expired for a while, stop
33244 being willing to build circuits using it. Fixes bug 401. Bugfix
33246 - Directory caches now fetch certificates from all authorities
33247 listed in a networkstatus consensus, even when they do not
33248 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
33249 - When connecting to a bridge without specifying its key, insert
33250 the connection into the identity-to-connection map as soon as
33251 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
33252 - Detect versions of OS X where malloc_good_size() is present in the
33253 library but never actually declared. Resolves bug 587. Bugfix
33255 - Stop incorrectly truncating zlib responses to directory authority
33256 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
33257 - Stop recommending that every server operator send mail to tor-ops.
33258 Resolves bug 597. Bugfix on 0.1.2.x.
33259 - Don't trigger an assert if we start a directory authority with a
33260 private IP address (like 127.0.0.1).
33261 - Avoid possible failures when generating a directory with routers
33262 with over-long versions strings, or too many flags set. Bugfix
33264 - If an attempt to launch a DNS resolve request over the control
33265 port fails because we have overrun the limit on the number of
33266 connections, tell the controller that the request has failed.
33267 - Avoid using too little bandwidth when our clock skips a few
33268 seconds. Bugfix on 0.1.2.x.
33269 - Fix shell error when warning about missing packages in configure
33270 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
33271 - Do not become confused when receiving a spurious VERSIONS-like
33272 cell from a confused v1 client. Bugfix on 0.2.0.x.
33273 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
33274 introduction points for a hidden service have failed. Patch from
33275 Karsten Loesing. Bugfix on 0.2.0.x.
33277 o Code simplifications and refactoring:
33278 - Remove some needless generality from cpuworker code, for improved
33280 - Stop overloading the circuit_t.onionskin field for both "onionskin
33281 from a CREATE cell that we are waiting for a cpuworker to be
33282 assigned" and "onionskin from an EXTEND cell that we are going to
33283 send to an OR as soon as we are connected". Might help with bug 600.
33284 - Add an in-place version of aes_crypt() so that we can avoid doing a
33285 needless memcpy() call on each cell payload.
33288 Changes in version 0.2.0.18-alpha - 2008-01-25
33289 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
33290 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
33291 that can warn or reject connections to ports generally associated with
33292 vulnerable-plaintext protocols.
33294 o New directory authorities:
33295 - Set up dannenberg (run by CCC) as the sixth v3 directory
33299 - Fix a major memory leak when attempting to use the v2 TLS
33300 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
33301 - We accidentally enabled the under-development v2 TLS handshake
33302 code, which was causing log entries like "TLS error while
33303 renegotiating handshake". Disable it again. Resolves bug 590.
33304 - We were computing the wrong Content-Length: header for directory
33305 responses that need to be compressed on the fly, causing clients
33306 asking for those items to always fail. Bugfix on 0.2.0.x; partially
33310 - Avoid going directly to the directory authorities even if you're a
33311 relay, if you haven't found yourself reachable yet or if you've
33312 decided not to advertise your dirport yet. Addresses bug 556.
33313 - If we've gone 12 hours since our last bandwidth check, and we
33314 estimate we have less than 50KB bandwidth capacity but we could
33315 handle more, do another bandwidth test.
33316 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
33317 Tor can warn and/or refuse connections to ports commonly used with
33318 vulnerable-plaintext protocols. Currently we warn on ports 23,
33319 109, 110, and 143, but we don't reject any.
33322 - When we setconf ClientOnly to 1, close any current OR and Dir
33323 listeners. Reported by mwenge.
33324 - When we get a consensus that's been signed by more people than
33325 we expect, don't log about it; it's not a big deal. Reported
33329 - Don't answer "/tor/networkstatus-bridges" directory requests if
33330 the request isn't encrypted.
33331 - Make "ClientOnly 1" config option disable directory ports too.
33332 - Patches from Karsten Loesing to make v2 hidden services more
33333 robust: work even when there aren't enough HSDir relays available;
33334 retry when a v2 rend desc fetch fails; but don't retry if we
33335 already have a usable v0 rend desc.
33338 Changes in version 0.2.0.17-alpha - 2008-01-17
33339 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
33342 - Make the tor-gencert man page get included correctly in the tarball.
33345 Changes in version 0.2.0.16-alpha - 2008-01-17
33346 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
33347 Loesing, and generally cleans up a lot of features and minor bugs.
33349 o New directory authorities:
33350 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
33353 o Major performance improvements:
33354 - Switch our old ring buffer implementation for one more like that
33355 used by free Unix kernels. The wasted space in a buffer with 1mb
33356 of data will now be more like 8k than 1mb. The new implementation
33357 also avoids realloc();realloc(); patterns that can contribute to
33358 memory fragmentation.
33361 - Configuration files now accept C-style strings as values. This
33362 helps encode characters not allowed in the current configuration
33363 file format, such as newline or #. Addresses bug 557.
33364 - Although we fixed bug 539 (where servers would send HTTP status 503
33365 responses _and_ send a body too), there are still servers out
33366 there that haven't upgraded. Therefore, make clients parse such
33367 bodies when they receive them.
33368 - When we're not serving v2 directory information, there is no reason
33369 to actually keep any around. Remove the obsolete files and directory
33370 on startup if they are very old and we aren't going to serve them.
33372 o Minor performance improvements:
33373 - Reference-count and share copies of address policy entries; only 5%
33374 of them were actually distinct.
33375 - Never walk through the list of logs if we know that no log is
33376 interested in a given message.
33379 - When an authority has not signed a consensus, do not try to
33380 download a nonexistent "certificate with key 00000000". Bugfix
33381 on 0.2.0.x. Fixes bug 569.
33382 - Fix a rare assert error when we're closing one of our threads:
33383 use a mutex to protect the list of logs, so we never write to the
33384 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
33385 bug 575, which is kind of the revenge of bug 222.
33386 - Patch from Karsten Loesing to complain less at both the client
33387 and the relay when a relay used to have the HSDir flag but doesn't
33388 anymore, and we try to upload a hidden service descriptor.
33389 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
33391 - Do not try to download missing certificates until we have tried
33392 to check our fallback consensus. Fixes bug 583.
33393 - Make bridges round reported GeoIP stats info up to the nearest
33394 estimate, not down. Now we can distinguish between "0 people from
33395 this country" and "1 person from this country".
33396 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
33397 - Avoid possible segfault if key generation fails in
33398 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
33399 - Avoid segfault in the case where a badly behaved v2 versioning
33400 directory sends a signed networkstatus with missing client-versions.
33402 - Avoid segfaults on certain complex invocations of
33403 router_get_by_hexdigest(). Bugfix on 0.1.2.
33404 - Correct bad index on array access in parse_http_time(). Bugfix
33406 - Fix possible bug in vote generation when server versions are present
33407 but client versions are not.
33408 - Fix rare bug on REDIRECTSTREAM control command when called with no
33409 port set: it could erroneously report an error when none had
33411 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
33412 compressing large objects and find ourselves with more than 4k
33413 left over. Bugfix on 0.2.0.
33414 - Fix a small memory leak when setting up a hidden service.
33415 - Fix a few memory leaks that could in theory happen under bizarre
33417 - Fix an assert if we post a general-purpose descriptor via the
33418 control port but that descriptor isn't mentioned in our current
33419 network consensus. Bug reported by Jon McLachlan; bugfix on
33422 o Minor features (controller):
33423 - Get NS events working again. Patch from tup.
33424 - The GETCONF command now escapes and quotes configuration values
33425 that don't otherwise fit into the torrc file.
33426 - The SETCONF command now handles quoted values correctly.
33428 o Minor features (directory authorities):
33429 - New configuration options to override default maximum number of
33430 servers allowed on a single IP address. This is important for
33431 running a test network on a single host.
33432 - Actually implement the -s option to tor-gencert.
33433 - Add a manual page for tor-gencert.
33435 o Minor features (bridges):
33436 - Bridge authorities no longer serve bridge descriptors over
33437 unencrypted connections.
33439 o Minor features (other):
33440 - Add hidden services and DNSPorts to the list of things that make
33441 Tor accept that it has running ports. Change starting Tor with no
33442 ports from a fatal error to a warning; we might change it back if
33443 this turns out to confuse anybody. Fixes bug 579.
33446 Changes in version 0.1.2.19 - 2008-01-17
33447 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
33448 exit policy a little bit more conservative so it's safer to run an
33449 exit relay on a home system, and fixes a variety of smaller issues.
33452 - Exit policies now reject connections that are addressed to a
33453 relay's public (external) IP address too, unless
33454 ExitPolicyRejectPrivate is turned off. We do this because too
33455 many relays are running nearby to services that trust them based
33456 on network address.
33459 - When the clock jumps forward a lot, do not allow the bandwidth
33460 buckets to become negative. Fixes bug 544.
33461 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
33462 on every successful resolve. Reported by Mike Perry.
33463 - Purge old entries from the "rephist" database and the hidden
33464 service descriptor database even when DirPort is zero.
33465 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
33466 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
33467 crashing or mis-answering these requests.
33468 - When we decide to send a 503 response to a request for servers, do
33469 not then also send the server descriptors: this defeats the whole
33470 purpose. Fixes bug 539.
33473 - Changing the ExitPolicyRejectPrivate setting should cause us to
33474 rebuild our server descriptor.
33475 - Fix handling of hex nicknames when answering controller requests for
33476 networkstatus by name, or when deciding whether to warn about
33477 unknown routers in a config option. (Patch from mwenge.)
33478 - Fix a couple of hard-to-trigger autoconf problems that could result
33479 in really weird results on platforms whose sys/types.h files define
33480 nonstandard integer types.
33481 - Don't try to create the datadir when running --verify-config or
33482 --hash-password. Resolves bug 540.
33483 - If we were having problems getting a particular descriptor from the
33484 directory caches, and then we learned about a new descriptor for
33485 that router, we weren't resetting our failure count. Reported
33487 - Although we fixed bug 539 (where servers would send HTTP status 503
33488 responses _and_ send a body too), there are still servers out there
33489 that haven't upgraded. Therefore, make clients parse such bodies
33490 when they receive them.
33491 - Run correctly on systems where rlim_t is larger than unsigned long.
33492 This includes some 64-bit systems.
33493 - Run correctly on platforms (like some versions of OS X 10.5) where
33494 the real limit for number of open files is OPEN_FILES, not rlim_max
33495 from getrlimit(RLIMIT_NOFILES).
33496 - Avoid a spurious free on base64 failure.
33497 - Avoid segfaults on certain complex invocations of
33498 router_get_by_hexdigest().
33499 - Fix rare bug on REDIRECTSTREAM control command when called with no
33500 port set: it could erroneously report an error when none had
33504 Changes in version 0.2.0.15-alpha - 2007-12-25
33505 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
33506 features added in 0.2.0.13-alpha.
33509 - Fix several remotely triggerable asserts based on DirPort requests
33510 for a v2 or v3 networkstatus object before we were prepared. This
33511 was particularly bad for 0.2.0.13 and later bridge relays, who
33512 would never have a v2 networkstatus and would thus always crash
33513 when used. Bugfixes on 0.2.0.x.
33514 - Estimate the v3 networkstatus size more accurately, rather than
33515 estimating it at zero bytes and giving it artificially high priority
33516 compared to other directory requests. Bugfix on 0.2.0.x.
33519 - Fix configure.in logic for cross-compilation.
33520 - When we load a bridge descriptor from the cache, and it was
33521 previously unreachable, mark it as retriable so we won't just
33522 ignore it. Also, try fetching a new copy immediately. Bugfixes
33524 - The bridge GeoIP stats were counting other relays, for example
33525 self-reachability and authority-reachability tests.
33528 - Support compilation to target iPhone; patch from cjacker huang.
33529 To build for iPhone, pass the --enable-iphone option to configure.
33532 Changes in version 0.2.0.14-alpha - 2007-12-23
33534 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
33535 without a datadirectory from a previous Tor install. Reported
33537 - Fix a crash when we fetch a descriptor that turns out to be
33538 unexpected (it used to be in our networkstatus when we started
33539 fetching it, but it isn't in our current networkstatus), and we
33540 aren't using bridges. Bugfix on 0.2.0.x.
33541 - Fix a crash when accessing hidden services: it would work the first
33542 time you use a given introduction point for your service, but
33543 on subsequent requests we'd be using garbage memory. Fixed by
33544 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
33545 - Fix a crash when we load a bridge descriptor from disk but we don't
33546 currently have a Bridge line for it in our torrc. Bugfix on
33550 - If bridge authorities set BridgePassword, they will serve a
33551 snapshot of known bridge routerstatuses from their DirPort to
33552 anybody who knows that password. Unset by default.
33555 - Make the unit tests build again.
33556 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
33557 - Make PublishServerDescriptor default to 1, so the default doesn't
33558 have to change as we invent new directory protocol versions.
33559 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
33560 be included unless sys/time.h is already included. Fixes
33561 bug 553. Bugfix on 0.2.0.x.
33562 - If we receive a general-purpose descriptor and then receive an
33563 identical bridge-purpose descriptor soon after, don't discard
33564 the next one as a duplicate.
33567 - If BridgeRelay is set to 1, then the default for
33568 PublishServerDescriptor is now "bridge" rather than "v2,v3".
33569 - If the user sets RelayBandwidthRate but doesn't set
33570 RelayBandwidthBurst, then make them equal rather than erroring out.
33573 Changes in version 0.2.0.13-alpha - 2007-12-21
33574 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
33575 Goodell, fixes many more bugs, and adds a lot of infrastructure for
33578 o New directory authorities:
33579 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
33583 - Only update guard status (usable / not usable) once we have
33584 enough directory information. This was causing us to always pick
33585 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
33586 causing us to discard all our guards on startup if we hadn't been
33587 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
33588 - Purge old entries from the "rephist" database and the hidden
33589 service descriptor databases even when DirPort is zero. Bugfix
33591 - We were ignoring our RelayBandwidthRate for the first 30 seconds
33592 after opening a circuit -- even a relayed circuit. Bugfix on
33594 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
33595 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
33596 crashing or mis-answering these types of requests.
33597 - Relays were publishing their server descriptor to v1 and v2
33598 directory authorities, but they didn't try publishing to v3-only
33599 authorities. Fix this; and also stop publishing to v1 authorities.
33601 - When we were reading router descriptors from cache, we were ignoring
33602 the annotations -- so for example we were reading in bridge-purpose
33603 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
33604 - When we decided to send a 503 response to a request for servers, we
33605 were then also sending the server descriptors: this defeats the
33606 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
33609 - Bridge relays now behave like clients with respect to time
33610 intervals for downloading new consensus documents -- otherwise they
33611 stand out. Bridge users now wait until the end of the interval,
33612 so their bridge relay will be sure to have a new consensus document.
33613 - Three new config options (AlternateDirAuthority,
33614 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
33615 user selectively replace the default directory authorities by type,
33616 rather than the all-or-nothing replacement that DirServer offers.
33617 - Tor can now be configured to read a GeoIP file from disk in one
33618 of two formats. This can be used by controllers to map IP addresses
33619 to countries. Eventually, it may support exit-by-country.
33620 - When possible, bridge relays remember which countries users
33621 are coming from, and report aggregate information in their
33622 extra-info documents, so that the bridge authorities can learn
33623 where Tor is blocked.
33624 - Bridge directory authorities now do reachability testing on the
33625 bridges they know. They provide router status summaries to the
33626 controller via "getinfo ns/purpose/bridge", and also dump summaries
33627 to a file periodically.
33628 - Stop fetching directory info so aggressively if your DirPort is
33629 on but your ORPort is off; stop fetching v2 dir info entirely.
33630 You can override these choices with the new FetchDirInfoEarly
33634 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
33635 consensus documents when there are too many relays at a single
33636 IP address. Now clear it in v2 network status documents too, and
33637 also clear it in routerinfo_t when the relay is no longer listed
33638 in the relevant networkstatus document.
33639 - Don't crash if we get an unexpected value for the
33640 PublishServerDescriptor config option. Reported by Matt Edman;
33641 bugfix on 0.2.0.9-alpha.
33642 - Our new v2 hidden service descriptor format allows descriptors
33643 that have no introduction points. But Tor crashed when we tried
33644 to build a descriptor with no intro points (and it would have
33645 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
33646 by Karsten Loesing.
33647 - Fix building with dmalloc 5.5.2 with glibc.
33648 - Reject uploaded descriptors and extrainfo documents if they're
33649 huge. Otherwise we'll cache them all over the network and it'll
33650 clog everything up. Reported by Aljosha Judmayer.
33651 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
33652 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
33653 - When the DANGEROUS_VERSION controller status event told us we're
33654 running an obsolete version, it used the string "OLD" to describe
33655 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
33656 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
33657 - If we can't expand our list of entry guards (e.g. because we're
33658 using bridges or we have StrictEntryNodes set), don't mark relays
33659 down when they fail a directory request. Otherwise we're too quick
33660 to mark all our entry points down. Bugfix on 0.1.2.x.
33661 - Fix handling of hex nicknames when answering controller requests for
33662 networkstatus by name, or when deciding whether to warn about unknown
33663 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
33664 - Fix a couple of hard-to-trigger autoconf problems that could result
33665 in really weird results on platforms whose sys/types.h files define
33666 nonstandard integer types. Bugfix on 0.1.2.x.
33667 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
33668 - Don't crash on name lookup when we have no current consensus. Fixes
33669 bug 538; bugfix on 0.2.0.x.
33670 - Only Tors that want to mirror the v2 directory info should
33671 create the "cached-status" directory in their datadir. (All Tors
33672 used to create it.) Bugfix on 0.2.0.9-alpha.
33673 - Directory authorities should only automatically download Extra Info
33674 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
33677 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
33678 consumers. (We already do this on HUP.)
33679 - Authorities and caches fetch the v2 networkstatus documents
33680 less often, now that v3 is encouraged.
33681 - Add a new config option BridgeRelay that specifies you want to
33682 be a bridge relay. Right now the only difference is that it makes
33683 you answer begin_dir requests, and it makes you cache dir info,
33684 even if your DirPort isn't on.
33685 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
33686 ask about source, timestamp of arrival, purpose, etc. We need
33687 something like this to help Vidalia not do GeoIP lookups on bridge
33689 - Allow multiple HashedControlPassword config lines, to support
33690 multiple controller passwords.
33691 - Authorities now decide whether they're authoritative for a given
33692 router based on the router's purpose.
33693 - New config options AuthDirBadDir and AuthDirListBadDirs for
33694 authorities to mark certain relays as "bad directories" in the
33695 networkstatus documents. Also supports the "!baddir" directive in
33696 the approved-routers file.
33699 Changes in version 0.2.0.12-alpha - 2007-11-16
33700 This twelfth development snapshot fixes some more build problems as
33701 well as a few minor bugs.
33704 - Make it build on OpenBSD again. Patch from tup.
33705 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
33706 package-building for Red Hat, OS X, etc.
33708 o Minor bugfixes (on 0.1.2.x):
33709 - Changing the ExitPolicyRejectPrivate setting should cause us to
33710 rebuild our server descriptor.
33712 o Minor bugfixes (on 0.2.0.x):
33713 - When we're lacking a consensus, don't try to perform rendezvous
33714 operations. Reported by Karsten Loesing.
33715 - Fix a small memory leak whenever we decide against using a
33716 newly picked entry guard. Reported by Mike Perry.
33717 - When authorities detected more than two relays running on the same
33718 IP address, they were clearing all the status flags but forgetting
33719 to clear the "hsdir" flag. So clients were being told that a
33720 given relay was the right choice for a v2 hsdir lookup, yet they
33721 never had its descriptor because it was marked as 'not running'
33723 - If we're trying to fetch a bridge descriptor and there's no way
33724 the bridge authority could help us (for example, we don't know
33725 a digest, or there is no bridge authority), don't be so eager to
33726 fall back to asking the bridge authority.
33727 - If we're using bridges or have strictentrynodes set, and our
33728 chosen exit is in the same family as all our bridges/entry guards,
33729 then be flexible about families.
33732 - When we negotiate a v2 link-layer connection (not yet implemented),
33733 accept RELAY_EARLY cells and turn them into RELAY cells if we've
33734 negotiated a v1 connection for their next step. Initial code for
33738 Changes in version 0.2.0.11-alpha - 2007-11-12
33739 This eleventh development snapshot fixes some build problems with
33740 the previous snapshot. It also includes a more secure-by-default exit
33741 policy for relays, fixes an enormous memory leak for exit relays, and
33742 fixes another bug where servers were falling out of the directory list.
33745 - Exit policies now reject connections that are addressed to a
33746 relay's public (external) IP address too, unless
33747 ExitPolicyRejectPrivate is turned off. We do this because too
33748 many relays are running nearby to services that trust them based
33749 on network address. Bugfix on 0.1.2.x.
33752 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
33753 on every successful resolve. Reported by Mike Perry; bugfix
33755 - On authorities, never downgrade to old router descriptors simply
33756 because they're listed in the consensus. This created a catch-22
33757 where we wouldn't list a new descriptor because there was an
33758 old one in the consensus, and we couldn't get the new one in the
33759 consensus because we wouldn't list it. Possible fix for bug 548.
33760 Also, this might cause bug 543 to appear on authorities; if so,
33761 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
33763 o Packaging fixes on 0.2.0.10-alpha:
33764 - We were including instructions about what to do with the
33765 src/config/fallback-consensus file, but we weren't actually
33766 including it in the tarball. Disable all of that for now.
33769 - Allow people to say PreferTunnelledDirConns rather than
33770 PreferTunneledDirConns, for those alternate-spellers out there.
33773 - Don't reevaluate all the information from our consensus document
33774 just because we've downloaded a v2 networkstatus that we intend
33775 to cache. Fixes bug 545; bugfix on 0.2.0.x.
33778 Changes in version 0.2.0.10-alpha - 2007-11-10
33779 This tenth development snapshot adds a third v3 directory authority
33780 run by Mike Perry, adds most of Karsten Loesing's new hidden service
33781 descriptor format, fixes a bad crash bug and new bridge bugs introduced
33782 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
33783 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
33784 addresses many more minor issues.
33786 o New directory authorities:
33787 - Set up ides (run by Mike Perry) as the third v3 directory authority.
33790 - Allow tunnelled directory connections to ask for an encrypted
33791 "begin_dir" connection or an anonymized "uses a full Tor circuit"
33792 connection independently. Now we can make anonymized begin_dir
33793 connections for (e.g.) more secure hidden service posting and
33795 - More progress on proposal 114: code from Karsten Loesing to
33796 implement new hidden service descriptor format.
33797 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
33798 accommodate the growing number of servers that use the default
33799 and are reaching it.
33800 - Directory authorities use a new formula for selecting which nodes
33801 to advertise as Guards: they must be in the top 7/8 in terms of
33802 how long we have known about them, and above the median of those
33803 nodes in terms of weighted fractional uptime.
33804 - Make "not enough dir info yet" warnings describe *why* Tor feels
33805 it doesn't have enough directory info yet.
33808 - Stop servers from crashing if they set a Family option (or
33809 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
33811 - Make bridge users work again -- the move to v3 directories in
33812 0.2.0.9-alpha had introduced a number of bugs that made bridges
33813 no longer work for clients.
33814 - When the clock jumps forward a lot, do not allow the bandwidth
33815 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
33817 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
33818 - When the consensus lists a router descriptor that we previously were
33819 mirroring, but that we considered non-canonical, reload the
33820 descriptor as canonical. This fixes bug 543 where Tor servers
33821 would start complaining after a few days that they don't have
33822 enough directory information to build a circuit.
33823 - Consider replacing the current consensus when certificates arrive
33824 that make the pending consensus valid. Previously, we were only
33825 considering replacement when the new certs _didn't_ help.
33826 - Fix an assert error on startup if we didn't already have the
33827 consensus and certs cached in our datadirectory: we were caching
33828 the consensus in consensus_waiting_for_certs but then free'ing it
33830 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
33831 Request) if we need more v3 certs but we've already got pending
33832 requests for all of them.
33833 - Correctly back off from failing certificate downloads. Fixes
33835 - Authorities don't vote on the Running flag if they have been running
33836 for less than 30 minutes themselves. Fixes bug 547, where a newly
33837 started authority would vote that everyone was down.
33839 o New requirements:
33840 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
33841 it, it had no AES, and it hasn't seen any security patches since
33845 - Clients now hold circuitless TLS connections open for 1.5 times
33846 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
33847 rebuild a new circuit over them within that timeframe. Previously,
33848 they held them open only for KeepalivePeriod (5 minutes).
33849 - Use "If-Modified-Since" to avoid retrieving consensus
33850 networkstatuses that we already have.
33851 - When we have no consensus, check FallbackNetworkstatusFile (defaults
33852 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
33853 we start knowing some directory caches.
33854 - When we receive a consensus from the future, warn about skew.
33855 - Improve skew reporting: try to give the user a better log message
33856 about how skewed they are, and how much this matters.
33857 - When we have a certificate for an authority, believe that
33858 certificate's claims about the authority's IP address.
33859 - New --quiet command-line option to suppress the default console log.
33860 Good in combination with --hash-password.
33861 - Authorities send back an X-Descriptor-Not-New header in response to
33862 an accepted-but-discarded descriptor upload. Partially implements
33864 - Make the log message for "tls error. breaking." more useful.
33865 - Better log messages about certificate downloads, to attempt to
33866 track down the second incarnation of bug 546.
33868 o Minor features (bridges):
33869 - If bridge users set UpdateBridgesFromAuthority, but the digest
33870 they ask for is a 404 from the bridge authority, they now fall
33871 back to trying the bridge directly.
33872 - Bridges now use begin_dir to publish their server descriptor to
33873 the bridge authority, even when they haven't set TunnelDirConns.
33875 o Minor features (controller):
33876 - When reporting clock skew, and we know that the clock is _at least
33877 as skewed_ as some value, but we don't know the actual value,
33878 report the value as a "minimum skew."
33881 - Update linux-tor-prio.sh script to allow QoS based on the uid of
33882 the Tor process. Patch from Marco Bonetti with tweaks from Mike
33886 - Refuse to start if both ORPort and UseBridges are set. Bugfix
33887 on 0.2.0.x, suggested by Matt Edman.
33888 - Don't stop fetching descriptors when FetchUselessDescriptors is
33889 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
33890 reported by tup and ioerror.
33891 - Better log message on vote from unknown authority.
33892 - Don't log "Launching 0 request for 0 router" message.
33894 o Minor bugfixes (memory leaks):
33895 - Stop leaking memory every time we parse a v3 certificate. Bugfix
33897 - Stop leaking memory every time we load a v3 certificate. Bugfix
33898 on 0.2.0.1-alpha. Fixes bug 536.
33899 - Stop leaking a cached networkstatus on exit. Bugfix on
33901 - Stop leaking voter information every time we free a consensus.
33902 Bugfix on 0.2.0.3-alpha.
33903 - Stop leaking signed data every time we check a voter signature.
33904 Bugfix on 0.2.0.3-alpha.
33905 - Stop leaking a signature every time we fail to parse a consensus or
33906 a vote. Bugfix on 0.2.0.3-alpha.
33907 - Stop leaking v2_download_status_map on shutdown. Bugfix on
33909 - Stop leaking conn->nickname every time we make a connection to a
33910 Tor relay without knowing its expected identity digest (e.g. when
33911 using bridges). Bugfix on 0.2.0.3-alpha.
33913 - Minor bugfixes (portability):
33914 - Run correctly on platforms where rlim_t is larger than unsigned
33915 long, and/or where the real limit for number of open files is
33916 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
33917 particular, these may be needed for OS X 10.5.
33920 Changes in version 0.1.2.18 - 2007-10-28
33921 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
33922 hidden service introduction that were causing huge delays, and a big
33923 bug that was causing some servers to disappear from the network status
33924 lists for a few hours each day.
33926 o Major bugfixes (crashes):
33927 - If a connection is shut down abruptly because of something that
33928 happened inside connection_flushed_some(), do not call
33929 connection_finished_flushing(). Should fix bug 451:
33930 "connection_stop_writing: Assertion conn->write_event failed"
33931 Bugfix on 0.1.2.7-alpha.
33932 - Fix possible segfaults in functions called from
33933 rend_process_relay_cell().
33935 o Major bugfixes (hidden services):
33936 - Hidden services were choosing introduction points uniquely by
33937 hexdigest, but when constructing the hidden service descriptor
33938 they merely wrote the (potentially ambiguous) nickname.
33939 - Clients now use the v2 intro format for hidden service
33940 connections: they specify their chosen rendezvous point by identity
33941 digest rather than by (potentially ambiguous) nickname. These
33942 changes could speed up hidden service connections dramatically.
33944 o Major bugfixes (other):
33945 - Stop publishing a new server descriptor just because we get a
33946 HUP signal. This led (in a roundabout way) to some servers getting
33947 dropped from the networkstatus lists for a few hours each day.
33948 - When looking for a circuit to cannibalize, consider family as well
33949 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
33950 circuit cannibalization).
33951 - When a router wasn't listed in a new networkstatus, we were leaving
33952 the flags for that router alone -- meaning it remained Named,
33953 Running, etc -- even though absence from the networkstatus means
33954 that it shouldn't be considered to exist at all anymore. Now we
33955 clear all the flags for routers that fall out of the networkstatus
33956 consensus. Fixes bug 529.
33959 - Don't try to access (or alter) the state file when running
33960 --list-fingerprint or --verify-config or --hash-password. Resolves
33962 - When generating information telling us how to extend to a given
33963 router, do not try to include the nickname if it is
33964 absent. Resolves bug 467.
33965 - Fix a user-triggerable segfault in expand_filename(). (There isn't
33966 a way to trigger this remotely.)
33967 - When sending a status event to the controller telling it that an
33968 OR address is reachable, set the port correctly. (Previously we
33969 were reporting the dir port.)
33970 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
33971 command. Bugfix on 0.1.2.17.
33972 - When loading bandwidth history, do not believe any information in
33973 the future. Fixes bug 434.
33974 - When loading entry guard information, do not believe any information
33976 - When we have our clock set far in the future and generate an
33977 onion key, then re-set our clock to be correct, we should not stop
33978 the onion key from getting rotated.
33979 - On some platforms, accept() can return a broken address. Detect
33980 this more quietly, and deal accordingly. Fixes bug 483.
33981 - It's not actually an error to find a non-pending entry in the DNS
33982 cache when canceling a pending resolve. Don't log unless stuff
33983 is fishy. Resolves bug 463.
33984 - Don't reset trusted dir server list when we set a configuration
33985 option. Patch from Robert Hogan.
33986 - Don't try to create the datadir when running --verify-config or
33987 --hash-password. Resolves bug 540.
33990 Changes in version 0.2.0.9-alpha - 2007-10-24
33991 This ninth development snapshot switches clients to the new v3 directory
33992 system; allows servers to be listed in the network status even when they
33993 have the same nickname as a registered server; and fixes many other
33994 bugs including a big one that was causing some servers to disappear
33995 from the network status lists for a few hours each day.
33997 o Major features (directory system):
33998 - Clients now download v3 consensus networkstatus documents instead
33999 of v2 networkstatus documents. Clients and caches now base their
34000 opinions about routers on these consensus documents. Clients only
34001 download router descriptors listed in the consensus.
34002 - Authorities now list servers who have the same nickname as
34003 a different named server, but list them with a new flag,
34004 "Unnamed". Now we can list servers that happen to pick the same
34005 nickname as a server that registered two years ago and then
34006 disappeared. Partially implements proposal 122.
34007 - If the consensus lists a router as "Unnamed", the name is assigned
34008 to a different router: do not identify the router by that name.
34009 Partially implements proposal 122.
34010 - Authorities can now come to a consensus on which method to use to
34011 compute the consensus. This gives us forward compatibility.
34014 - Stop publishing a new server descriptor just because we HUP or
34015 when we find our DirPort to be reachable but won't actually publish
34016 it. New descriptors without any real changes are dropped by the
34017 authorities, and can screw up our "publish every 18 hours" schedule.
34019 - When a router wasn't listed in a new networkstatus, we were leaving
34020 the flags for that router alone -- meaning it remained Named,
34021 Running, etc -- even though absence from the networkstatus means
34022 that it shouldn't be considered to exist at all anymore. Now we
34023 clear all the flags for routers that fall out of the networkstatus
34024 consensus. Fixes bug 529; bugfix on 0.1.2.x.
34025 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
34026 extrainfo documents and then discard them immediately for not
34027 matching the latest router. Bugfix on 0.2.0.1-alpha.
34029 o Minor features (v3 directory protocol):
34030 - Allow tor-gencert to generate a new certificate without replacing
34032 - Allow certificates to include an address.
34033 - When we change our directory-cache settings, reschedule all voting
34034 and download operations.
34035 - Reattempt certificate downloads immediately on failure, as long as
34036 we haven't failed a threshold number of times yet.
34037 - Delay retrying consensus downloads while we're downloading
34038 certificates to verify the one we just got. Also, count getting a
34039 consensus that we already have (or one that isn't valid) as a failure,
34040 and count failing to get the certificates after 20 minutes as a
34042 - Build circuits and download descriptors even if our consensus is a
34043 little expired. (This feature will go away once authorities are
34046 o Minor features (router descriptor cache):
34047 - If we find a cached-routers file that's been sitting around for more
34048 than 28 days unmodified, then most likely it's a leftover from
34049 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
34051 - When we (as a cache) download a descriptor because it was listed
34052 in a consensus, remember when the consensus was supposed to expire,
34053 and don't expire the descriptor until then.
34055 o Minor features (performance):
34056 - Call routerlist_remove_old_routers() much less often. This should
34057 speed startup, especially on directory caches.
34058 - Don't try to launch new descriptor downloads quite so often when we
34059 already have enough directory information to build circuits.
34060 - Base64 decoding was actually showing up on our profile when parsing
34061 the initial descriptor file; switch to an in-process all-at-once
34062 implementation that's about 3.5x times faster than calling out to
34065 o Minor features (compilation):
34066 - Detect non-ASCII platforms (if any still exist) and refuse to
34067 build there: some of our code assumes that 'A' is 65 and so on.
34069 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
34070 - Make the "next period" votes into "current period" votes immediately
34071 after publishing the consensus; avoid a heisenbug that made them
34072 stick around indefinitely.
34073 - When we discard a vote as a duplicate, do not report this as
34075 - Treat missing v3 keys or certificates as an error when running as a
34076 v3 directory authority.
34077 - When we're configured to be a v3 authority, but we're only listed
34078 as a non-v3 authority in our DirServer line for ourself, correct
34080 - If an authority doesn't have a qualified hostname, just put
34081 its address in the vote. This fixes the problem where we referred to
34082 "moria on moria:9031."
34083 - Distinguish between detached signatures for the wrong period, and
34084 detached signatures for a divergent vote.
34085 - Fix a small memory leak when computing a consensus.
34086 - When there's no consensus, we were forming a vote every 30
34087 minutes, but writing the "valid-after" line in our vote based
34088 on our configured V3AuthVotingInterval: so unless the intervals
34089 matched up, we immediately rejected our own vote because it didn't
34090 start at the voting interval that caused us to construct a vote.
34092 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
34093 - Delete unverified-consensus when the real consensus is set.
34094 - Consider retrying a consensus networkstatus fetch immediately
34095 after one fails: don't wait 60 seconds to notice.
34096 - When fetching a consensus as a cache, wait until a newer consensus
34097 should exist before trying to replace the current one.
34098 - Use a more forgiving schedule for retrying failed consensus
34099 downloads than for other types.
34101 o Minor bugfixes (other directory issues):
34102 - Correct the implementation of "download votes by digest." Bugfix on
34104 - Authorities no longer send back "400 you're unreachable please fix
34105 it" errors to Tor servers that aren't online all the time. We're
34106 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
34108 o Minor bugfixes (controller):
34109 - Don't reset trusted dir server list when we set a configuration
34110 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
34111 - Respond to INT and TERM SIGNAL commands before we execute the
34112 signal, in case the signal shuts us down. We had a patch in
34113 0.1.2.1-alpha that tried to do this by queueing the response on
34114 the connection's buffer before shutting down, but that really
34115 isn't the same thing at all. Bug located by Matt Edman.
34117 o Minor bugfixes (misc):
34118 - Correctly check for bad options to the "PublishServerDescriptor"
34119 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
34120 - Stop leaking memory on failing case of base32_decode, and make
34121 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
34122 - Don't try to download extrainfo documents when we're trying to
34123 fetch enough directory info to build a circuit: having enough
34124 info should get priority. Bugfix on 0.2.0.x.
34125 - Don't complain that "your server has not managed to confirm that its
34126 ports are reachable" if we haven't been able to build any circuits
34127 yet. Bug found by spending four hours without a v3 consensus. Bugfix
34129 - Detect the reason for failing to mmap a descriptor file we just
34130 wrote, and give a more useful log message. Fixes bug 533. Bugfix
34133 o Code simplifications and refactoring:
34134 - Remove support for the old bw_accounting file: we've been storing
34135 bandwidth accounting information in the state file since
34136 0.1.2.5-alpha. This may result in bandwidth accounting errors
34137 if you try to upgrade from 0.1.1.x or earlier, or if you try to
34138 downgrade to 0.1.1.x or earlier.
34139 - New convenience code to locate a file within the DataDirectory.
34140 - Move non-authority functionality out of dirvote.c.
34141 - Refactor the arguments for router_pick_{directory_|trusteddir}server
34142 so that they all take the same named flags.
34145 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
34146 Unix users an easy way to script their Tor process (e.g. by
34147 adjusting bandwidth based on the time of the day).
34150 Changes in version 0.2.0.8-alpha - 2007-10-12
34151 This eighth development snapshot fixes a crash bug that's been bothering
34152 us since February 2007, lets bridge authorities store a list of bridge
34153 descriptors they've seen, gets v3 directory voting closer to working,
34154 starts caching v3 directory consensus documents on directory mirrors,
34155 and fixes a variety of smaller issues including some minor memory leaks.
34157 o Major features (router descriptor cache):
34158 - Store routers in a file called cached-descriptors instead of in
34159 cached-routers. Initialize cached-descriptors from cached-routers
34160 if the old format is around. The new format allows us to store
34161 annotations along with descriptors.
34162 - Use annotations to record the time we received each descriptor, its
34163 source, and its purpose.
34164 - Disable the SETROUTERPURPOSE controller command: it is now
34166 - Controllers should now specify cache=no or cache=yes when using
34167 the +POSTDESCRIPTOR command.
34168 - Bridge authorities now write bridge descriptors to disk, meaning
34169 we can export them to other programs and begin distributing them
34172 o Major features (directory authorities):
34173 - When a v3 authority is missing votes or signatures, it now tries
34175 - Directory authorities track weighted fractional uptime as well as
34176 weighted mean-time-between failures. WFU is suitable for deciding
34177 whether a node is "usually up", while MTBF is suitable for deciding
34178 whether a node is "likely to stay up." We need both, because
34179 "usually up" is a good requirement for guards, while "likely to
34180 stay up" is a good requirement for long-lived connections.
34182 o Major features (v3 directory system):
34183 - Caches now download v3 network status documents as needed,
34184 and download the descriptors listed in them.
34185 - All hosts now attempt to download and keep fresh v3 authority
34186 certificates, and re-attempt after failures.
34187 - More internal-consistency checks for vote parsing.
34189 o Major bugfixes (crashes):
34190 - If a connection is shut down abruptly because of something that
34191 happened inside connection_flushed_some(), do not call
34192 connection_finished_flushing(). Should fix bug 451. Bugfix on
34195 o Major bugfixes (performance):
34196 - Fix really bad O(n^2) performance when parsing a long list of
34197 routers: Instead of searching the entire list for an "extra-info "
34198 string which usually wasn't there, once for every routerinfo
34199 we read, just scan lines forward until we find one we like.
34201 - When we add data to a write buffer in response to the data on that
34202 write buffer getting low because of a flush, do not consider the
34203 newly added data as a candidate for immediate flushing, but rather
34204 make it wait until the next round of writing. Otherwise, we flush
34205 and refill recursively, and a single greedy TLS connection can
34206 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
34208 o Minor features (v3 authority system):
34209 - Add more ways for tools to download the votes that lead to the
34211 - Send a 503 when low on bandwidth and a vote, consensus, or
34212 certificate is requested.
34213 - If-modified-since is now implemented properly for all kinds of
34214 certificate requests.
34216 o Minor bugfixes (network statuses):
34217 - Tweak the implementation of proposal 109 slightly: allow at most
34218 two Tor servers on the same IP address, except if it's the location
34219 of a directory authority, in which case allow five. Bugfix on
34222 o Minor bugfixes (controller):
34223 - When sending a status event to the controller telling it that an
34224 OR address is reachable, set the port correctly. (Previously we
34225 were reporting the dir port.) Bugfix on 0.1.2.x.
34227 o Minor bugfixes (v3 directory system):
34228 - Fix logic to look up a cert by its signing key digest. Bugfix on
34230 - Only change the reply to a vote to "OK" if it's not already
34231 set. This gets rid of annoying "400 OK" log messages, which may
34232 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
34233 - When we get a valid consensus, recompute the voting schedule.
34234 - Base the valid-after time of a vote on the consensus voting
34235 schedule, not on our preferred schedule.
34236 - Make the return values and messages from signature uploads and
34237 downloads more sensible.
34238 - Fix a memory leak when serving votes and consensus documents, and
34239 another when serving certificates.
34241 o Minor bugfixes (performance):
34242 - Use a slightly simpler string hashing algorithm (copying Python's
34243 instead of Java's) and optimize our digest hashing algorithm to take
34244 advantage of 64-bit platforms and to remove some possibly-costly
34246 - Fix a minor memory leak whenever we parse guards from our state
34247 file. Bugfix on 0.2.0.7-alpha.
34248 - Fix a minor memory leak whenever we write out a file. Bugfix on
34250 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
34251 command. Bugfix on 0.2.0.5-alpha.
34253 o Minor bugfixes (portability):
34254 - On some platforms, accept() can return a broken address. Detect
34255 this more quietly, and deal accordingly. Fixes bug 483.
34256 - Stop calling tor_strlower() on uninitialized memory in some cases.
34257 Bugfix in 0.2.0.7-alpha.
34259 o Minor bugfixes (usability):
34260 - Treat some 403 responses from directory servers as INFO rather than
34261 WARN-severity events.
34262 - It's not actually an error to find a non-pending entry in the DNS
34263 cache when canceling a pending resolve. Don't log unless stuff is
34264 fishy. Resolves bug 463.
34266 o Minor bugfixes (anonymity):
34267 - Never report that we've used more bandwidth than we're willing to
34268 relay: it leaks how much non-relay traffic we're using. Resolves
34270 - When looking for a circuit to cannibalize, consider family as well
34271 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
34272 circuit cannibalization).
34274 o Code simplifications and refactoring:
34275 - Make a bunch of functions static. Remove some dead code.
34276 - Pull out about a third of the really big routerlist.c; put it in a
34277 new module, networkstatus.c.
34278 - Merge the extra fields in local_routerstatus_t back into
34279 routerstatus_t: we used to need one routerstatus_t for each
34280 authority's opinion, plus a local_routerstatus_t for the locally
34281 computed consensus opinion. To save space, we put the locally
34282 modified fields into local_routerstatus_t, and only the common
34283 stuff into routerstatus_t. But once v3 directories are in use,
34284 clients and caches will no longer need to hold authority opinions;
34285 thus, the rationale for keeping the types separate is now gone.
34286 - Make the code used to reschedule and reattempt downloads more
34288 - Turn all 'Are we a directory server/mirror?' logic into a call to
34290 - Remove the code to generate the oldest (v1) directory format.
34291 The code has been disabled since 0.2.0.5-alpha.
34294 Changes in version 0.2.0.7-alpha - 2007-09-21
34295 This seventh development snapshot makes bridges work again, makes bridge
34296 authorities work for the first time, fixes two huge performance flaws
34297 in hidden services, and fixes a variety of minor issues.
34299 o New directory authorities:
34300 - Set up moria1 and tor26 as the first v3 directory authorities. See
34301 doc/spec/dir-spec.txt for details on the new directory design.
34303 o Major bugfixes (crashes):
34304 - Fix possible segfaults in functions called from
34305 rend_process_relay_cell(). Bugfix on 0.1.2.x.
34307 o Major bugfixes (bridges):
34308 - Fix a bug that made servers send a "404 Not found" in response to
34309 attempts to fetch their server descriptor. This caused Tor servers
34310 to take many minutes to establish reachability for their DirPort,
34311 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
34312 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
34313 users configure that and specify a bridge with an identity
34314 fingerprint, now they will lookup the bridge descriptor at the
34315 default bridge authority via a one-hop tunnel, but once circuits
34316 are established they will switch to a three-hop tunnel for later
34317 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
34319 o Major bugfixes (hidden services):
34320 - Hidden services were choosing introduction points uniquely by
34321 hexdigest, but when constructing the hidden service descriptor
34322 they merely wrote the (potentially ambiguous) nickname.
34323 - Clients now use the v2 intro format for hidden service
34324 connections: they specify their chosen rendezvous point by identity
34325 digest rather than by (potentially ambiguous) nickname. Both
34326 are bugfixes on 0.1.2.x, and they could speed up hidden service
34327 connections dramatically. Thanks to Karsten Loesing.
34329 o Minor features (security):
34330 - As a client, do not believe any server that tells us that an
34331 address maps to an internal address space.
34332 - Make it possible to enable HashedControlPassword and
34333 CookieAuthentication at the same time.
34335 o Minor features (guard nodes):
34336 - Tag every guard node in our state file with the version that
34337 we believe added it, or with our own version if we add it. This way,
34338 if a user temporarily runs an old version of Tor and then switches
34339 back to a new one, she doesn't automatically lose her guards.
34341 o Minor features (speed):
34342 - When implementing AES counter mode, update only the portions of the
34343 counter buffer that need to change, and don't keep separate
34344 network-order and host-order counters when they are the same (i.e.,
34345 on big-endian hosts.)
34347 o Minor features (controller):
34348 - Accept LF instead of CRLF on controller, since some software has a
34349 hard time generating real Internet newlines.
34350 - Add GETINFO values for the server status events
34351 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
34354 o Removed features:
34355 - Routers no longer include bandwidth-history lines in their
34356 descriptors; this information is already available in extra-info
34357 documents, and including it in router descriptors took up 60%
34358 (!) of compressed router descriptor downloads. Completes
34359 implementation of proposal 104.
34360 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
34361 and TorControl.py, as they use the old v0 controller protocol,
34362 and are obsoleted by TorFlow anyway.
34363 - Drop support for v1 rendezvous descriptors, since we never used
34364 them anyway, and the code has probably rotted by now. Based on
34365 patch from Karsten Loesing.
34366 - On OSX, stop warning the user that kqueue support in libevent is
34367 "experimental", since it seems to have worked fine for ages.
34370 - When generating information telling us how to extend to a given
34371 router, do not try to include the nickname if it is absent. Fixes
34372 bug 467. Bugfix on 0.2.0.3-alpha.
34373 - Fix a user-triggerable (but not remotely-triggerable) segfault
34374 in expand_filename(). Bugfix on 0.1.2.x.
34375 - Fix a memory leak when freeing incomplete requests from DNSPort.
34376 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
34377 - Don't try to access (or alter) the state file when running
34378 --list-fingerprint or --verify-config or --hash-password. (Resolves
34379 bug 499.) Bugfix on 0.1.2.x.
34380 - Servers used to decline to publish their DirPort if their
34381 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
34382 were below a threshold. Now they only look at BandwidthRate and
34383 RelayBandwidthRate. Bugfix on 0.1.2.x.
34384 - Remove an optimization in the AES counter-mode code that assumed
34385 that the counter never exceeded 2^68. When the counter can be set
34386 arbitrarily as an IV (as it is by Karsten's new hidden services
34387 code), this assumption no longer holds. Bugfix on 0.1.2.x.
34388 - Resume listing "AUTHORITY" flag for authorities in network status.
34389 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
34391 o Code simplifications and refactoring:
34392 - Revamp file-writing logic so we don't need to have the entire
34393 contents of a file in memory at once before we write to disk. Tor,
34395 - Turn "descriptor store" into a full-fledged type.
34396 - Move all NT services code into a separate source file.
34397 - Unify all code that computes medians, percentile elements, etc.
34398 - Get rid of a needless malloc when parsing address policies.
34401 Changes in version 0.1.2.17 - 2007-08-30
34402 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
34403 X bundles. Vidalia 0.0.14 makes authentication required for the
34404 ControlPort in the default configuration, which addresses important
34405 security risks. Everybody who uses Vidalia (or another controller)
34408 In addition, this Tor update fixes major load balancing problems with
34409 path selection, which should speed things up a lot once many people
34412 o Major bugfixes (security):
34413 - We removed support for the old (v0) control protocol. It has been
34414 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
34415 become more of a headache than it's worth.
34417 o Major bugfixes (load balancing):
34418 - When choosing nodes for non-guard positions, weight guards
34419 proportionally less, since they already have enough load. Patch
34421 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
34422 will allow fast Tor servers to get more attention.
34423 - When we're upgrading from an old Tor version, forget our current
34424 guards and pick new ones according to the new weightings. These
34425 three load balancing patches could raise effective network capacity
34426 by a factor of four. Thanks to Mike Perry for measurements.
34428 o Major bugfixes (stream expiration):
34429 - Expire not-yet-successful application streams in all cases if
34430 they've been around longer than SocksTimeout. Right now there are
34431 some cases where the stream will live forever, demanding a new
34432 circuit every 15 seconds. Fixes bug 454; reported by lodger.
34434 o Minor features (controller):
34435 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
34436 is valid before any authentication has been received. It tells
34437 a controller what kind of authentication is expected, and what
34438 protocol is spoken. Implements proposal 119.
34440 o Minor bugfixes (performance):
34441 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
34442 greatly speeding up loading cached-routers from disk on startup.
34443 - Disable sentinel-based debugging for buffer code: we squashed all
34444 the bugs that this was supposed to detect a long time ago, and now
34445 its only effect is to change our buffer sizes from nice powers of
34446 two (which platform mallocs tend to like) to values slightly over
34447 powers of two (which make some platform mallocs sad).
34449 o Minor bugfixes (misc):
34450 - If exit bandwidth ever exceeds one third of total bandwidth, then
34451 use the correct formula to weight exit nodes when choosing paths.
34452 Based on patch from Mike Perry.
34453 - Choose perfectly fairly among routers when choosing by bandwidth and
34454 weighting by fraction of bandwidth provided by exits. Previously, we
34455 would choose with only approximate fairness, and correct ourselves
34456 if we ran off the end of the list.
34457 - If we require CookieAuthentication but we fail to write the
34458 cookie file, we would warn but not exit, and end up in a state
34459 where no controller could authenticate. Now we exit.
34460 - If we require CookieAuthentication, stop generating a new cookie
34461 every time we change any piece of our config.
34462 - Refuse to start with certain directory authority keys, and
34463 encourage people using them to stop.
34464 - Terminate multi-line control events properly. Original patch
34466 - Fix a minor memory leak when we fail to find enough suitable
34467 servers to choose a circuit.
34468 - Stop leaking part of the descriptor when we run into a particularly
34469 unparseable piece of it.
34472 Changes in version 0.2.0.6-alpha - 2007-08-26
34473 This sixth development snapshot features a new Vidalia version in the
34474 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
34475 the ControlPort in the default configuration, which addresses important
34478 In addition, this snapshot fixes major load balancing problems
34479 with path selection, which should speed things up a lot once many
34480 people have upgraded. The directory authorities also use a new
34481 mean-time-between-failure approach to tracking which servers are stable,
34482 rather than just looking at the most recent uptime.
34484 o New directory authorities:
34485 - Set up Tonga as the default bridge directory authority.
34488 - Directory authorities now track servers by weighted
34489 mean-times-between-failures. When we have 4 or more days of data,
34490 use measured MTBF rather than declared uptime to decide whether
34491 to call a router Stable. Implements proposal 108.
34493 o Major bugfixes (load balancing):
34494 - When choosing nodes for non-guard positions, weight guards
34495 proportionally less, since they already have enough load. Patch
34497 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
34498 will allow fast Tor servers to get more attention.
34499 - When we're upgrading from an old Tor version, forget our current
34500 guards and pick new ones according to the new weightings. These
34501 three load balancing patches could raise effective network capacity
34502 by a factor of four. Thanks to Mike Perry for measurements.
34504 o Major bugfixes (descriptor parsing):
34505 - Handle unexpected whitespace better in malformed descriptors. Bug
34506 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
34509 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
34510 GETINFO for Torstat to use until it can switch to using extrainfos.
34511 - Optionally (if built with -DEXPORTMALLINFO) export the output
34512 of mallinfo via http, as tor/mallinfo.txt. Only accessible
34516 - Do not intermix bridge routers with controller-added
34517 routers. (Bugfix on 0.2.0.x)
34518 - Do not fail with an assert when accept() returns an unexpected
34519 address family. Addresses but does not wholly fix bug 483. (Bugfix
34521 - Let directory authorities startup even when they can't generate
34522 a descriptor immediately, e.g. because they don't know their
34524 - Stop putting the authentication cookie in a file called "0"
34525 in your working directory if you don't specify anything for the
34526 new CookieAuthFile option. Reported by Matt Edman.
34527 - Make it possible to read the PROTOCOLINFO response in a way that
34528 conforms to our control-spec. Reported by Matt Edman.
34529 - Fix a minor memory leak when we fail to find enough suitable
34530 servers to choose a circuit. Bugfix on 0.1.2.x.
34531 - Stop leaking part of the descriptor when we run into a particularly
34532 unparseable piece of it. Bugfix on 0.1.2.x.
34533 - Unmap the extrainfo cache file on exit.
34536 Changes in version 0.2.0.5-alpha - 2007-08-19
34537 This fifth development snapshot fixes compilation on Windows again;
34538 fixes an obnoxious client-side bug that slowed things down and put
34539 extra load on the network; gets us closer to using the v3 directory
34540 voting scheme; makes it easier for Tor controllers to use cookie-based
34541 authentication; and fixes a variety of other bugs.
34543 o Removed features:
34544 - Version 1 directories are no longer generated in full. Instead,
34545 authorities generate and serve "stub" v1 directories that list
34546 no servers. This will stop Tor versions 0.1.0.x and earlier from
34547 working, but (for security reasons) nobody should be running those
34550 o Major bugfixes (compilation, 0.2.0.x):
34551 - Try to fix Win32 compilation again: improve checking for IPv6 types.
34552 - Try to fix MSVC compilation: build correctly on platforms that do
34553 not define s6_addr16 or s6_addr32.
34554 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
34557 o Major bugfixes (stream expiration):
34558 - Expire not-yet-successful application streams in all cases if
34559 they've been around longer than SocksTimeout. Right now there are
34560 some cases where the stream will live forever, demanding a new
34561 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
34562 reported by lodger.
34564 o Minor features (directory servers):
34565 - When somebody requests a list of statuses or servers, and we have
34566 none of those, return a 404 rather than an empty 200.
34568 o Minor features (directory voting):
34569 - Store v3 consensus status consensuses on disk, and reload them
34572 o Minor features (security):
34573 - Warn about unsafe ControlPort configurations.
34574 - Refuse to start with certain directory authority keys, and
34575 encourage people using them to stop.
34577 o Minor features (controller):
34578 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
34579 is valid before any authentication has been received. It tells
34580 a controller what kind of authentication is expected, and what
34581 protocol is spoken. Implements proposal 119.
34582 - New config option CookieAuthFile to choose a new location for the
34583 cookie authentication file, and config option
34584 CookieAuthFileGroupReadable to make it group-readable.
34586 o Minor features (unit testing):
34587 - Add command-line arguments to unit-test executable so that we can
34588 invoke any chosen test from the command line rather than having
34589 to run the whole test suite at once; and so that we can turn on
34590 logging for the unit tests.
34592 o Minor bugfixes (on 0.1.2.x):
34593 - If we require CookieAuthentication but we fail to write the
34594 cookie file, we would warn but not exit, and end up in a state
34595 where no controller could authenticate. Now we exit.
34596 - If we require CookieAuthentication, stop generating a new cookie
34597 every time we change any piece of our config.
34598 - When loading bandwidth history, do not believe any information in
34599 the future. Fixes bug 434.
34600 - When loading entry guard information, do not believe any information
34602 - When we have our clock set far in the future and generate an
34603 onion key, then re-set our clock to be correct, we should not stop
34604 the onion key from getting rotated.
34605 - Clean up torrc sample config file.
34606 - Do not automatically run configure from autogen.sh. This
34607 non-standard behavior tended to annoy people who have built other
34610 o Minor bugfixes (on 0.2.0.x):
34611 - Fix a bug with AutomapHostsOnResolve that would always cause
34612 the second request to fail. Bug reported by Kate. Bugfix on
34614 - Fix a bug in ADDRMAP controller replies that would sometimes
34615 try to print a NULL. Patch from tup.
34616 - Read v3 directory authority keys from the right location.
34617 - Numerous bugfixes to directory voting code.
34620 Changes in version 0.1.2.16 - 2007-08-01
34621 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
34622 remote attacker in certain situations to rewrite the user's torrc
34623 configuration file. This can completely compromise anonymity of users
34624 in most configurations, including those running the Vidalia bundles,
34625 TorK, etc. Or worse.
34627 o Major security fixes:
34628 - Close immediately after missing authentication on control port;
34629 do not allow multiple authentication attempts.
34632 Changes in version 0.2.0.4-alpha - 2007-08-01
34633 This fourth development snapshot fixes a critical security vulnerability
34634 for most users, specifically those running Vidalia, TorK, etc. Everybody
34635 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
34637 o Major security fixes:
34638 - Close immediately after missing authentication on control port;
34639 do not allow multiple authentication attempts.
34641 o Major bugfixes (compilation):
34642 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
34645 o Minor features (performance):
34646 - Be even more aggressive about releasing RAM from small
34647 empty buffers. Thanks to our free-list code, this shouldn't be too
34648 performance-intensive.
34649 - Disable sentinel-based debugging for buffer code: we squashed all
34650 the bugs that this was supposed to detect a long time ago, and
34651 now its only effect is to change our buffer sizes from nice
34652 powers of two (which platform mallocs tend to like) to values
34653 slightly over powers of two (which make some platform mallocs sad).
34654 - Log malloc statistics from mallinfo() on platforms where it
34658 Changes in version 0.2.0.3-alpha - 2007-07-29
34659 This third development snapshot introduces new experimental
34660 blocking-resistance features and a preliminary version of the v3
34661 directory voting design, and includes many other smaller features
34665 - The first pieces of our "bridge" design for blocking-resistance
34666 are implemented. People can run bridge directory authorities;
34667 people can run bridges; and people can configure their Tor clients
34668 with a set of bridges to use as the first hop into the Tor network.
34669 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
34671 - Create listener connections before we setuid to the configured
34672 User and Group. Now non-Windows users can choose port values
34673 under 1024, start Tor as root, and have Tor bind those ports
34674 before it changes to another UID. (Windows users could already
34676 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
34677 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
34678 on "vserver" accounts. (Patch from coderman.)
34679 - Be even more aggressive about separating local traffic from relayed
34680 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
34682 o Major features (experimental):
34683 - First cut of code for "v3 dir voting": directory authorities will
34684 vote on a common network status document rather than each publishing
34685 their own opinion. This code needs more testing and more corner-case
34686 handling before it's ready for use.
34689 - Directory authorities now call routers Fast if their bandwidth is
34690 at least 100KB/s, and consider their bandwidth adequate to be a
34691 Guard if it is at least 250KB/s, no matter the medians. This fix
34692 complements proposal 107. [Bugfix on 0.1.2.x]
34693 - Directory authorities now never mark more than 3 servers per IP as
34694 Valid and Running. (Implements proposal 109, by Kevin Bauer and
34696 - Minor change to organizationName and commonName generation
34697 procedures in TLS certificates during Tor handshakes, to invalidate
34698 some earlier censorware approaches. This is not a long-term
34699 solution, but applying it will give us a bit of time to look into
34700 the epidemiology of countermeasures as they spread.
34702 o Major bugfixes (directory):
34703 - Rewrite directory tokenization code to never run off the end of
34704 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
34706 o Minor features (controller):
34707 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
34708 match requests to applications. (Patch from Robert Hogan.)
34709 - Report address and port correctly on connections to DNSPort. (Patch
34710 from Robert Hogan.)
34711 - Add a RESOLVE command to launch hostname lookups. (Original patch
34712 from Robert Hogan.)
34713 - Add GETINFO status/enough-dir-info to let controllers tell whether
34714 Tor has downloaded sufficient directory information. (Patch
34716 - You can now use the ControlSocket option to tell Tor to listen for
34717 controller connections on Unix domain sockets on systems that
34718 support them. (Patch from Peter Palfrader.)
34719 - STREAM NEW events are generated for DNSPort requests and for
34720 tunneled directory connections. (Patch from Robert Hogan.)
34721 - New "GETINFO address-mappings/*" command to get address mappings
34722 with expiry information. "addr-mappings/*" is now deprecated.
34725 o Minor features (misc):
34726 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
34728 - The tor-gencert tool for v3 directory authorities now creates all
34729 files as readable to the file creator only, and write-protects
34730 the authority identity key.
34731 - When dumping memory usage, list bytes used in buffer memory
34733 - When running with dmalloc, dump more stats on hup and on exit.
34734 - Directory authorities now fail quickly and (relatively) harmlessly
34735 if they generate a network status document that is somehow
34738 o Traffic load balancing improvements:
34739 - If exit bandwidth ever exceeds one third of total bandwidth, then
34740 use the correct formula to weight exit nodes when choosing paths.
34741 (Based on patch from Mike Perry.)
34742 - Choose perfectly fairly among routers when choosing by bandwidth and
34743 weighting by fraction of bandwidth provided by exits. Previously, we
34744 would choose with only approximate fairness, and correct ourselves
34745 if we ran off the end of the list. [Bugfix on 0.1.2.x]
34747 o Performance improvements:
34748 - Be more aggressive with freeing buffer RAM or putting it on the
34750 - Use Critical Sections rather than Mutexes for synchronizing threads
34751 on win32; Mutexes are heavier-weight, and designed for synchronizing
34754 o Deprecated and removed features:
34755 - RedirectExits is now deprecated.
34756 - Stop allowing address masks that do not correspond to bit prefixes.
34757 We have warned about these for a really long time; now it's time
34758 to reject them. (Patch from croup.)
34760 o Minor bugfixes (directory):
34761 - Fix another crash bug related to extra-info caching. (Bug found by
34762 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
34763 - Directories no longer return a "304 not modified" when they don't
34764 have the networkstatus the client asked for. Also fix a memory
34765 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
34766 - We had accidentally labelled 0.1.2.x directory servers as not
34767 suitable for begin_dir requests, and had labelled no directory
34768 servers as suitable for uploading extra-info documents. [Bugfix
34771 o Minor bugfixes (dns):
34772 - Fix a crash when DNSPort is set more than once. (Patch from Robert
34773 Hogan.) [Bugfix on 0.2.0.2-alpha]
34774 - Add DNSPort connections to the global connection list, so that we
34775 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
34777 - Fix a dangling reference that could lead to a crash when DNSPort is
34778 changed or closed (Patch from Robert Hogan.) [Bugfix on
34781 o Minor bugfixes (controller):
34782 - Provide DNS expiry times in GMT, not in local time. For backward
34783 compatibility, ADDRMAP events only provide GMT expiry in an extended
34784 field. "GETINFO address-mappings" always does the right thing.
34785 - Use CRLF line endings properly in NS events.
34786 - Terminate multi-line control events properly. (Original patch
34787 from tup.) [Bugfix on 0.1.2.x-alpha]
34788 - Do not include spaces in SOURCE_ADDR fields in STREAM
34789 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
34792 Changes in version 0.1.2.15 - 2007-07-17
34793 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
34794 problems, fixes compilation on BSD, and fixes a variety of other
34795 bugs. Everybody should upgrade.
34797 o Major bugfixes (compilation):
34798 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
34800 o Major bugfixes (crashes):
34801 - Try even harder not to dereference the first character after
34802 an mmap(). Reported by lodger.
34803 - Fix a crash bug in directory authorities when we re-number the
34804 routerlist while inserting a new router.
34805 - When the cached-routers file is an even multiple of the page size,
34806 don't run off the end and crash. (Fixes bug 455; based on idea
34808 - Fix eventdns.c behavior on Solaris: It is critical to include
34809 orconfig.h _before_ sys/types.h, so that we can get the expected
34810 definition of _FILE_OFFSET_BITS.
34812 o Major bugfixes (security):
34813 - Fix a possible buffer overrun when using BSD natd support. Bug
34815 - When sending destroy cells from a circuit's origin, don't include
34816 the reason for tearing down the circuit. The spec says we didn't,
34817 and now we actually don't. Reported by lodger.
34818 - Keep streamids from different exits on a circuit separate. This
34819 bug may have allowed other routers on a given circuit to inject
34820 cells into streams. Reported by lodger; fixes bug 446.
34821 - If there's a never-before-connected-to guard node in our list,
34822 never choose any guards past it. This way we don't expand our
34823 guard list unless we need to.
34825 o Minor bugfixes (guard nodes):
34826 - Weight guard selection by bandwidth, so that low-bandwidth nodes
34827 don't get overused as guards.
34829 o Minor bugfixes (directory):
34830 - Correctly count the number of authorities that recommend each
34831 version. Previously, we were under-counting by 1.
34832 - Fix a potential crash bug when we load many server descriptors at
34833 once and some of them make others of them obsolete. Fixes bug 458.
34835 o Minor bugfixes (hidden services):
34836 - Stop tearing down the whole circuit when the user asks for a
34837 connection to a port that the hidden service didn't configure.
34840 o Minor bugfixes (misc):
34841 - On Windows, we were preventing other processes from reading
34842 cached-routers while Tor was running. Reported by janbar.
34843 - Fix a possible (but very unlikely) bug in picking routers by
34844 bandwidth. Add a log message to confirm that it is in fact
34845 unlikely. Patch from lodger.
34846 - Backport a couple of memory leak fixes.
34847 - Backport miscellaneous cosmetic bugfixes.
34850 Changes in version 0.2.0.2-alpha - 2007-06-02
34851 o Major bugfixes on 0.2.0.1-alpha:
34852 - Fix an assertion failure related to servers without extra-info digests.
34853 Resolves bugs 441 and 442.
34855 o Minor features (directory):
34856 - Support "If-Modified-Since" when answering HTTP requests for
34857 directories, running-routers documents, and network-status documents.
34858 (There's no need to support it for router descriptors, since those
34859 are downloaded by descriptor digest.)
34861 o Minor build issues:
34862 - Clear up some MIPSPro compiler warnings.
34863 - When building from a tarball on a machine that happens to have SVK
34864 installed, report the micro-revision as whatever version existed
34865 in the tarball, not as "x".
34868 Changes in version 0.2.0.1-alpha - 2007-06-01
34869 This early development snapshot provides new features for people running
34870 Tor as both a client and a server (check out the new RelayBandwidth
34871 config options); lets Tor run as a DNS proxy; and generally moves us
34872 forward on a lot of fronts.
34874 o Major features, server usability:
34875 - New config options RelayBandwidthRate and RelayBandwidthBurst:
34876 a separate set of token buckets for relayed traffic. Right now
34877 relayed traffic is defined as answers to directory requests, and
34878 OR connections that don't have any local circuits on them.
34880 o Major features, client usability:
34881 - A client-side DNS proxy feature to replace the need for
34882 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
34883 for DNS requests on port 9999, use the Tor network to resolve them
34884 anonymously, and send the reply back like a regular DNS server.
34885 The code still only implements a subset of DNS.
34886 - Make PreferTunneledDirConns and TunnelDirConns work even when
34887 we have no cached directory info. This means Tor clients can now
34888 do all of their connections protected by TLS.
34890 o Major features, performance and efficiency:
34891 - Directory authorities accept and serve "extra info" documents for
34892 routers. These documents contain fields from router descriptors
34893 that aren't usually needed, and that use a lot of excess
34894 bandwidth. Once these fields are removed from router descriptors,
34895 the bandwidth savings should be about 60%. [Partially implements
34897 - Servers upload extra-info documents to any authority that accepts
34898 them. Authorities (and caches that have been configured to download
34899 extra-info documents) download them as needed. [Partially implements
34901 - Change the way that Tor buffers data that it is waiting to write.
34902 Instead of queueing data cells in an enormous ring buffer for each
34903 client->OR or OR->OR connection, we now queue cells on a separate
34904 queue for each circuit. This lets us use less slack memory, and
34905 will eventually let us be smarter about prioritizing different kinds
34907 - Use memory pools to allocate cells with better speed and memory
34908 efficiency, especially on platforms where malloc() is inefficient.
34909 - Stop reading on edge connections when their corresponding circuit
34910 buffers are full; start again as the circuits empty out.
34912 o Major features, other:
34913 - Add an HSAuthorityRecordStats option that hidden service authorities
34914 can use to track statistics of overall hidden service usage without
34915 logging information that would be very useful to an attacker.
34916 - Start work implementing multi-level keys for directory authorities:
34917 Add a standalone tool to generate key certificates. (Proposal 103.)
34920 - Directory authorities now call routers Stable if they have an
34921 uptime of at least 30 days, even if that's not the median uptime
34922 in the network. Implements proposal 107, suggested by Kevin Bauer
34925 o Minor fixes (resource management):
34926 - Count the number of open sockets separately from the number
34927 of active connection_t objects. This will let us avoid underusing
34928 our allocated connection limit.
34929 - We no longer use socket pairs to link an edge connection to an
34930 anonymous directory connection or a DirPort test connection.
34931 Instead, we track the link internally and transfer the data
34932 in-process. This saves two sockets per "linked" connection (at the
34933 client and at the server), and avoids the nasty Windows socketpair()
34935 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
34936 for every single inactive connection_t. Free items from the
34937 4k/16k-buffer free lists when they haven't been used for a while.
34939 o Minor features (build):
34940 - Make autoconf search for libevent, openssl, and zlib consistently.
34941 - Update deprecated macros in configure.in.
34942 - When warning about missing headers, tell the user to let us
34943 know if the compile succeeds anyway, so we can downgrade the
34945 - Include the current subversion revision as part of the version
34946 string: either fetch it directly if we're in an SVN checkout, do
34947 some magic to guess it if we're in an SVK checkout, or use
34948 the last-detected version if we're building from a .tar.gz.
34949 Use this version consistently in log messages.
34951 o Minor features (logging):
34952 - Always prepend "Bug: " to any log message about a bug.
34953 - Put a platform string (e.g. "Linux i686") in the startup log
34954 message, so when people paste just their logs, we know if it's
34955 OpenBSD or Windows or what.
34956 - When logging memory usage, break down memory used in buffers by
34959 o Minor features (directory system):
34960 - New config option V2AuthoritativeDirectory that all directory
34961 authorities should set. This will let future authorities choose
34962 not to serve V2 directory information.
34963 - Directory authorities allow multiple router descriptors and/or extra
34964 info documents to be uploaded in a single go. This will make
34965 implementing proposal 104 simpler.
34967 o Minor features (controller):
34968 - Add a new config option __DisablePredictedCircuits designed for
34969 use by the controller, when we don't want Tor to build any circuits
34971 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
34972 so we can exit from the middle of the circuit.
34973 - Implement "getinfo status/circuit-established".
34974 - Implement "getinfo status/version/..." so a controller can tell
34975 whether the current version is recommended, and whether any versions
34976 are good, and how many authorities agree. (Patch from shibz.)
34978 o Minor features (hidden services):
34979 - Allow multiple HiddenServicePort directives with the same virtual
34980 port; when they occur, the user is sent round-robin to one
34981 of the target ports chosen at random. Partially fixes bug 393 by
34982 adding limited ad-hoc round-robining.
34984 o Minor features (other):
34986 - Add a new AutomapHostsOnResolve option: when it is enabled, any
34987 resolve request for hosts matching a given pattern causes Tor to
34988 generate an internal virtual address mapping for that host. This
34989 allows DNSPort to work sensibly with hidden service users. By
34990 default, .exit and .onion addresses are remapped; the list of
34991 patterns can be reconfigured with AutomapHostsSuffixes.
34992 - Add an "-F" option to tor-resolve to force a resolve for a .onion
34993 address. Thanks to the AutomapHostsOnResolve option, this is no
34994 longer a completely silly thing to do.
34995 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
34996 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
34997 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
34998 minus 1 byte: the actual maximum declared bandwidth.
35000 o Removed features:
35001 - Removed support for the old binary "version 0" controller protocol.
35002 This has been deprecated since 0.1.1, and warnings have been issued
35003 since 0.1.2. When we encounter a v0 control message, we now send
35004 back an error and close the connection.
35005 - Remove the old "dns worker" server DNS code: it hasn't been default
35006 since 0.1.2.2-alpha, and all the servers seem to be using the new
35009 o Minor bugfixes (portability):
35010 - Even though Windows is equally happy with / and \ as path separators,
35011 try to use \ consistently on Windows and / consistently on Unix: it
35012 makes the log messages nicer.
35013 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
35014 - Read resolv.conf files correctly on platforms where read() returns
35015 partial results on small file reads.
35017 o Minor bugfixes (directory):
35018 - Correctly enforce that elements of directory objects do not appear
35019 more often than they are allowed to appear.
35020 - When we are reporting the DirServer line we just parsed, we were
35021 logging the second stanza of the key fingerprint, not the first.
35023 o Minor bugfixes (logging):
35024 - When we hit an EOF on a log (probably because we're shutting down),
35025 don't try to remove the log from the list: just mark it as
35026 unusable. (Bulletproofs against bug 222.)
35028 o Minor bugfixes (other):
35029 - In the exitlist script, only consider the most recently published
35030 server descriptor for each server. Also, when the user requests
35031 a list of servers that _reject_ connections to a given address,
35032 explicitly exclude the IPs that also have servers that accept
35033 connections to that address. (Resolves bug 405.)
35034 - Stop allowing hibernating servers to be "stable" or "fast".
35035 - On Windows, we were preventing other processes from reading
35036 cached-routers while Tor was running. (Reported by janbar)
35037 - Make the NodeFamilies config option work. (Reported by
35038 lodger -- it has never actually worked, even though we added it
35040 - Check return values from pthread_mutex functions.
35041 - Don't save non-general-purpose router descriptors to the disk cache,
35042 because we have no way of remembering what their purpose was when
35044 - Add even more asserts to hunt down bug 417.
35045 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
35046 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
35047 Add a log message to confirm that it is in fact unlikely.
35049 o Minor bugfixes (controller):
35050 - Make 'getinfo fingerprint' return a 551 error if we're not a
35051 server, so we match what the control spec claims we do. Reported
35053 - Fix a typo in an error message when extendcircuit fails that
35054 caused us to not follow the \r\n-based delimiter protocol. Reported
35057 o Code simplifications and refactoring:
35058 - Stop passing around circuit_t and crypt_path_t pointers that are
35059 implicit in other procedure arguments.
35060 - Drop the old code to choke directory connections when the
35061 corresponding OR connections got full: thanks to the cell queue
35062 feature, OR conns don't get full any more.
35063 - Make dns_resolve() handle attaching connections to circuits
35064 properly, so the caller doesn't have to.
35065 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
35066 - Keep the connection array as a dynamic smartlist_t, rather than as
35067 a fixed-sized array. This is important, as the number of connections
35068 is becoming increasingly decoupled from the number of sockets.
35071 Changes in version 0.1.2.14 - 2007-05-25
35072 Tor 0.1.2.14 changes the addresses of two directory authorities (this
35073 change especially affects those who serve or use hidden services),
35074 and fixes several other crash- and security-related bugs.
35076 o Directory authority changes:
35077 - Two directory authorities (moria1 and moria2) just moved to new
35078 IP addresses. This change will particularly affect those who serve
35079 or use hidden services.
35081 o Major bugfixes (crashes):
35082 - If a directory server runs out of space in the connection table
35083 as it's processing a begin_dir request, it will free the exit stream
35084 but leave it attached to the circuit, leading to unpredictable
35085 behavior. (Reported by seeess, fixes bug 425.)
35086 - Fix a bug in dirserv_remove_invalid() that would cause authorities
35087 to corrupt memory under some really unlikely scenarios.
35088 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
35089 - Avoid segfaults when reading from mmaped descriptor file. (Reported
35092 o Major bugfixes (security):
35093 - When choosing an entry guard for a circuit, avoid using guards
35094 that are in the same family as the chosen exit -- not just guards
35095 that are exactly the chosen exit. (Reported by lodger.)
35097 o Major bugfixes (resource management):
35098 - If a directory authority is down, skip it when deciding where to get
35099 networkstatus objects or descriptors. Otherwise we keep asking
35100 every 10 seconds forever. Fixes bug 384.
35101 - Count it as a failure if we fetch a valid network-status but we
35102 don't want to keep it. Otherwise we'll keep fetching it and keep
35103 not wanting to keep it. Fixes part of bug 422.
35104 - If all of our dirservers have given us bad or no networkstatuses
35105 lately, then stop hammering them once per minute even when we
35106 think they're failed. Fixes another part of bug 422.
35109 - Actually set the purpose correctly for descriptors inserted with
35110 purpose=controller.
35111 - When we have k non-v2 authorities in our DirServer config,
35112 we ignored the last k authorities in the list when updating our
35114 - Correctly back-off from requesting router descriptors that we are
35115 having a hard time downloading.
35116 - Read resolv.conf files correctly on platforms where read() returns
35117 partial results on small file reads.
35118 - Don't rebuild the entire router store every time we get 32K of
35119 routers: rebuild it when the journal gets very large, or when
35120 the gaps in the store get very large.
35123 - When routers publish SVN revisions in their router descriptors,
35124 authorities now include those versions correctly in networkstatus
35126 - Warn when using a version of libevent before 1.3b to run a server on
35127 OSX or BSD: these versions interact badly with userspace threads.
35130 Changes in version 0.1.2.13 - 2007-04-24
35131 This release features some major anonymity fixes, such as safer path
35132 selection; better client performance; faster bootstrapping, better
35133 address detection, and better DNS support for servers; write limiting as
35134 well as read limiting to make servers easier to run; and a huge pile of
35135 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
35137 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
35138 of the Freenode IRC network, remembering his patience and vision for
35139 free speech on the Internet.
35142 - Fix a memory leak when we ask for "all" networkstatuses and we
35143 get one we don't recognize.
35144 - Add more asserts to hunt down bug 417.
35145 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
35148 Changes in version 0.1.2.12-rc - 2007-03-16
35150 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
35151 directory information requested inside Tor connections (i.e. via
35152 begin_dir cells). It only triggered when the same connection was
35153 serving other data at the same time. Reported by seeess.
35156 - When creating a circuit via the controller, send a 'launched'
35157 event when we're done, so we follow the spec better.
35160 Changes in version 0.1.2.11-rc - 2007-03-15
35161 o Minor bugfixes (controller), reported by daejees:
35162 - Correct the control spec to match how the code actually responds
35163 to 'getinfo addr-mappings/*'.
35164 - The control spec described a GUARDS event, but the code
35165 implemented a GUARD event. Standardize on GUARD, but let people
35166 ask for GUARDS too.
35169 Changes in version 0.1.2.10-rc - 2007-03-07
35170 o Major bugfixes (Windows):
35171 - Do not load the NT services library functions (which may not exist)
35172 just to detect if we're a service trying to shut down. Now we run
35173 on Win98 and friends again.
35175 o Minor bugfixes (other):
35176 - Clarify a couple of log messages.
35177 - Fix a misleading socks5 error number.
35180 Changes in version 0.1.2.9-rc - 2007-03-02
35181 o Major bugfixes (Windows):
35182 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
35183 of the usual GCC "%llu". This prevents a bug when saving 64-bit
35184 int configuration values: the high-order 32 bits would get
35185 truncated. In particular, we were being bitten by the default
35186 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
35187 and maybe also bug 397.)
35189 o Minor bugfixes (performance):
35190 - Use OpenSSL's AES implementation on platforms where it's faster.
35191 This could save us as much as 10% CPU usage.
35193 o Minor bugfixes (server):
35194 - Do not rotate onion key immediately after setting it for the first
35197 o Minor bugfixes (directory authorities):
35198 - Stop calling servers that have been hibernating for a long time
35199 "stable". Also, stop letting hibernating or obsolete servers affect
35200 uptime and bandwidth cutoffs.
35201 - Stop listing hibernating servers in the v1 directory.
35203 o Minor bugfixes (hidden services):
35204 - Upload hidden service descriptors slightly less often, to reduce
35205 load on authorities.
35207 o Minor bugfixes (other):
35208 - Fix an assert that could trigger if a controller quickly set then
35209 cleared EntryNodes. Bug found by Udo van den Heuvel.
35210 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
35212 - Fix a potential race condition in the rpm installer. Found by
35214 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
35215 of 2 as indicating that the server is completely bad; it sometimes
35216 means that the server is just bad for the request in question. (may fix
35217 the last of bug 326.)
35218 - Disable encrypted directory connections when we don't have a server
35219 descriptor for the destination. We'll get this working again in
35223 Changes in version 0.1.2.8-beta - 2007-02-26
35224 o Major bugfixes (crashes):
35225 - Stop crashing when the controller asks us to resetconf more than
35226 one config option at once. (Vidalia 0.0.11 does this.)
35227 - Fix a crash that happened on Win98 when we're given command-line
35228 arguments: don't try to load NT service functions from advapi32.dll
35229 except when we need them. (Bug introduced in 0.1.2.7-alpha;
35231 - Fix a longstanding obscure crash bug that could occur when
35232 we run out of DNS worker processes. (Resolves bug 390.)
35234 o Major bugfixes (hidden services):
35235 - Correctly detect whether hidden service descriptor downloads are
35236 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
35238 o Major bugfixes (accounting):
35239 - When we start during an accounting interval before it's time to wake
35240 up, remember to wake up at the correct time. (May fix bug 342.)
35242 o Minor bugfixes (controller):
35243 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
35244 clear the corresponding on_circuit variable, and remember later
35245 that we don't need to send a redundant CLOSED event. Resolves part
35247 - Report events where a resolve succeeded or where we got a socks
35248 protocol error correctly, rather than calling both of them
35250 - Change reported stream target addresses to IP consistently when
35251 we finally get the IP from an exit node.
35252 - Send log messages to the controller even if they happen to be very
35255 o Minor bugfixes (other):
35256 - Display correct results when reporting which versions are
35257 recommended, and how recommended they are. (Resolves bug 383.)
35258 - Improve our estimates for directory bandwidth to be less random:
35259 guess that an unrecognized directory will have the average bandwidth
35260 from all known directories, not that it will have the average
35261 bandwidth from those directories earlier than it on the list.
35262 - If we start a server with ClientOnly 1, then set ClientOnly to 0
35263 and hup, stop triggering an assert based on an empty onion_key.
35264 - On platforms with no working mmap() equivalent, don't warn the
35265 user when cached-routers doesn't exist.
35266 - Warn the user when mmap() [or its equivalent] fails for some reason
35267 other than file-not-found.
35268 - Don't warn the user when cached-routers.new doesn't exist: that's
35269 perfectly fine when starting up for the first time.
35270 - When EntryNodes are configured, rebuild the guard list to contain,
35271 in order: the EntryNodes that were guards before; the rest of the
35272 EntryNodes; the nodes that were guards before.
35273 - Mask out all signals in sub-threads; only the libevent signal
35274 handler should be processing them. This should prevent some crashes
35275 on some machines using pthreads. (Patch from coderman.)
35276 - Fix switched arguments on memset in the implementation of
35277 tor_munmap() for systems with no mmap() call.
35278 - When Tor receives a router descriptor that it asked for, but
35279 no longer wants (because it has received fresh networkstatuses
35280 in the meantime), do not warn the user. Cache the descriptor if
35281 we're a cache; drop it if we aren't.
35282 - Make earlier entry guards _really_ get retried when the network
35284 - On a malformed DNS reply, always give an error to the corresponding
35286 - Build with recent libevents on platforms that do not define the
35287 nonstandard types "u_int8_t" and friends.
35289 o Minor features (controller):
35290 - Warn the user when an application uses the obsolete binary v0
35291 control protocol. We're planning to remove support for it during
35292 the next development series, so it's good to give people some
35294 - Add STREAM_BW events to report per-entry-stream bandwidth
35295 use. (Patch from Robert Hogan.)
35296 - Rate-limit SIGNEWNYM signals in response to controllers that
35297 impolitely generate them for every single stream. (Patch from
35298 mwenge; closes bug 394.)
35299 - Make REMAP stream events have a SOURCE (cache or exit), and
35300 make them generated in every case where we get a successful
35301 connected or resolved cell.
35303 o Minor bugfixes (performance):
35304 - Call router_have_min_dir_info half as often. (This is showing up in
35305 some profiles, but not others.)
35306 - When using GCC, make log_debug never get called at all, and its
35307 arguments never get evaluated, when no debug logs are configured.
35308 (This is showing up in some profiles, but not others.)
35311 - Remove some never-implemented options. Mark PathlenCoinWeight as
35313 - Implement proposal 106: Stop requiring clients to have well-formed
35314 certificates; stop checking nicknames in certificates. (Clients
35315 have certificates so that they can look like Tor servers, but in
35316 the future we might want to allow them to look like regular TLS
35317 clients instead. Nicknames in certificates serve no purpose other
35318 than making our protocol easier to recognize on the wire.)
35319 - Revise messages on handshake failure again to be even more clear about
35320 which are incoming connections and which are outgoing.
35321 - Discard any v1 directory info that's over 1 month old (for
35322 directories) or over 1 week old (for running-routers lists).
35323 - Do not warn when individual nodes in the configuration's EntryNodes,
35324 ExitNodes, etc are down: warn only when all possible nodes
35325 are down. (Fixes bug 348.)
35326 - Always remove expired routers and networkstatus docs before checking
35327 whether we have enough information to build circuits. (Fixes
35329 - Put a lower-bound on MaxAdvertisedBandwidth.
35332 Changes in version 0.1.2.7-alpha - 2007-02-06
35333 o Major bugfixes (rate limiting):
35334 - Servers decline directory requests much more aggressively when
35335 they're low on bandwidth. Otherwise they end up queueing more and
35336 more directory responses, which can't be good for latency.
35337 - But never refuse directory requests from local addresses.
35338 - Fix a memory leak when sending a 503 response for a networkstatus
35340 - Be willing to read or write on local connections (e.g. controller
35341 connections) even when the global rate limiting buckets are empty.
35342 - If our system clock jumps back in time, don't publish a negative
35343 uptime in the descriptor. Also, don't let the global rate limiting
35344 buckets go absurdly negative.
35345 - Flush local controller connection buffers periodically as we're
35346 writing to them, so we avoid queueing 4+ megabytes of data before
35349 o Major bugfixes (NT services):
35350 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
35351 command-line flag so that admins can override the default by saying
35352 "tor --service install --user "SomeUser"". This will not affect
35353 existing installed services. Also, warn the user that the service
35354 will look for its configuration file in the service user's
35355 %appdata% directory. (We can't do the 'hardwire the user's appdata
35356 directory' trick any more, since we may not have read access to that
35359 o Major bugfixes (other):
35360 - Previously, we would cache up to 16 old networkstatus documents
35361 indefinitely, if they came from nontrusted authorities. Now we
35362 discard them if they are more than 10 days old.
35363 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
35365 - Detect and reject malformed DNS responses containing circular
35367 - If exits are rare enough that we're not marking exits as guards,
35368 ignore exit bandwidth when we're deciding the required bandwidth
35370 - When we're handling a directory connection tunneled over Tor,
35371 don't fill up internal memory buffers with all the data we want
35372 to tunnel; instead, only add it if the OR connection that will
35373 eventually receive it has some room for it. (This can lead to
35374 slowdowns in tunneled dir connections; a better solution will have
35375 to wait for 0.2.0.)
35377 o Minor bugfixes (dns):
35378 - Add some defensive programming to eventdns.c in an attempt to catch
35379 possible memory-stomping bugs.
35380 - Detect and reject DNS replies containing IPv4 or IPv6 records with
35381 an incorrect number of bytes. (Previously, we would ignore the
35383 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
35384 in the correct order, and doesn't crash.
35385 - Free memory held in recently-completed DNS lookup attempts on exit.
35386 This was not a memory leak, but may have been hiding memory leaks.
35387 - Handle TTL values correctly on reverse DNS lookups.
35388 - Treat failure to parse resolv.conf as an error.
35390 o Minor bugfixes (other):
35391 - Fix crash with "tor --list-fingerprint" (reported by seeess).
35392 - When computing clock skew from directory HTTP headers, consider what
35393 time it was when we finished asking for the directory, not what
35395 - Expire socks connections if they spend too long waiting for the
35396 handshake to finish. Previously we would let them sit around for
35397 days, if the connecting application didn't close them either.
35398 - And if the socks handshake hasn't started, don't send a
35399 "DNS resolve socks failed" handshake reply; just close it.
35400 - Stop using C functions that OpenBSD's linker doesn't like.
35401 - Don't launch requests for descriptors unless we have networkstatuses
35402 from at least half of the authorities. This delays the first
35403 download slightly under pathological circumstances, but can prevent
35404 us from downloading a bunch of descriptors we don't need.
35405 - Do not log IPs with TLS failures for incoming TLS
35406 connections. (Fixes bug 382.)
35407 - If the user asks to use invalid exit nodes, be willing to use
35409 - Stop using the reserved ac_cv namespace in our configure script.
35410 - Call stat() slightly less often; use fstat() when possible.
35411 - Refactor the way we handle pending circuits when an OR connection
35412 completes or fails, in an attempt to fix a rare crash bug.
35413 - Only rewrite a conn's address based on X-Forwarded-For: headers
35414 if it's a parseable public IP address; and stop adding extra quotes
35415 to the resulting address.
35418 - Weight directory requests by advertised bandwidth. Now we can
35419 let servers enable write limiting but still allow most clients to
35420 succeed at their directory requests. (We still ignore weights when
35421 choosing a directory authority; I hope this is a feature.)
35424 - Create a new file ReleaseNotes which was the old ChangeLog. The
35425 new ChangeLog file now includes the summaries for all development
35427 - Check for addresses with invalid characters at the exit as well
35428 as at the client, and warn less verbosely when they fail. You can
35429 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
35430 - Adapt a patch from goodell to let the contrib/exitlist script
35431 take arguments rather than require direct editing.
35432 - Inform the server operator when we decide not to advertise a
35433 DirPort due to AccountingMax enabled or a low BandwidthRate. It
35434 was confusing Zax, so now we're hopefully more helpful.
35435 - Bring us one step closer to being able to establish an encrypted
35436 directory tunnel without knowing a descriptor first. Still not
35437 ready yet. As part of the change, now assume we can use a
35438 create_fast cell if we don't know anything about a router.
35439 - Allow exit nodes to use nameservers running on ports other than 53.
35440 - Servers now cache reverse DNS replies.
35441 - Add an --ignore-missing-torrc command-line option so that we can
35442 get the "use sensible defaults if the configuration file doesn't
35443 exist" behavior even when specifying a torrc location on the command
35446 o Minor features (controller):
35447 - Track reasons for OR connection failure; make these reasons
35448 available via the controller interface. (Patch from Mike Perry.)
35449 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
35450 can learn when clients are sending malformed hostnames to Tor.
35451 - Clean up documentation for controller status events.
35452 - Add a REMAP status to stream events to note that a stream's
35453 address has changed because of a cached address or a MapAddress
35457 Changes in version 0.1.2.6-alpha - 2007-01-09
35459 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
35460 connection handles more than 4 gigs in either direction, we crash.
35461 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
35462 advertised exit node, somebody might try to exit from us when
35463 we're bootstrapping and before we've built our descriptor yet.
35464 Refuse the connection rather than crashing.
35467 - Warn if we (as a server) find that we've resolved an address that we
35468 weren't planning to resolve.
35469 - Warn that using select() on any libevent version before 1.1 will be
35470 unnecessarily slow (even for select()).
35471 - Flush ERR-level controller status events just like we currently
35472 flush ERR-level log events, so that a Tor shutdown doesn't prevent
35473 the controller from learning about current events.
35475 o Minor features (more controller status events):
35476 - Implement EXTERNAL_ADDRESS server status event so controllers can
35477 learn when our address changes.
35478 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
35479 can learn when directories reject our descriptor.
35480 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
35481 can learn when a client application is speaking a non-socks protocol
35483 - Implement DANGEROUS_SOCKS client status event so controllers
35484 can learn when a client application is leaking DNS addresses.
35485 - Implement BUG general status event so controllers can learn when
35486 Tor is unhappy about its internal invariants.
35487 - Implement CLOCK_SKEW general status event so controllers can learn
35488 when Tor thinks the system clock is set incorrectly.
35489 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
35490 server status events so controllers can learn when their descriptors
35491 are accepted by a directory.
35492 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
35493 server status events so controllers can learn about Tor's progress in
35494 deciding whether it's reachable from the outside.
35495 - Implement BAD_LIBEVENT general status event so controllers can learn
35496 when we have a version/method combination in libevent that needs to
35498 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
35499 and DNS_USELESS server status events so controllers can learn
35500 about changes to DNS server status.
35502 o Minor features (directory):
35503 - Authorities no longer recommend exits as guards if this would shift
35504 too much load to the exit nodes.
35507 Changes in version 0.1.2.5-alpha - 2007-01-06
35509 - Enable write limiting as well as read limiting. Now we sacrifice
35510 capacity if we're pushing out lots of directory traffic, rather
35511 than overrunning the user's intended bandwidth limits.
35512 - Include TLS overhead when counting bandwidth usage; previously, we
35513 would count only the bytes sent over TLS, but not the bytes used
35515 - Support running the Tor service with a torrc not in the same
35516 directory as tor.exe and default to using the torrc located in
35517 the %appdata%\Tor\ of the user who installed the service. Patch
35519 - Servers now check for the case when common DNS requests are going to
35520 wildcarded addresses (i.e. all getting the same answer), and change
35521 their exit policy to reject *:* if it's happening.
35522 - Implement BEGIN_DIR cells, so we can connect to the directory
35523 server via TLS to do encrypted directory requests rather than
35524 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
35525 config options if you like.
35527 o Minor features (config and docs):
35528 - Start using the state file to store bandwidth accounting data:
35529 the bw_accounting file is now obsolete. We'll keep generating it
35530 for a while for people who are still using 0.1.2.4-alpha.
35531 - Try to batch changes to the state file so that we do as few
35532 disk writes as possible while still storing important things in
35534 - The state file and the bw_accounting file get saved less often when
35535 the AvoidDiskWrites config option is set.
35536 - Make PIDFile work on Windows (untested).
35537 - Add internal descriptions for a bunch of configuration options:
35538 accessible via controller interface and in comments in saved
35540 - Reject *:563 (NNTPS) in the default exit policy. We already reject
35541 NNTP by default, so this seems like a sensible addition.
35542 - Clients now reject hostnames with invalid characters. This should
35543 avoid some inadvertent info leaks. Add an option
35544 AllowNonRFC953Hostnames to disable this behavior, in case somebody
35545 is running a private network with hosts called @, !, and #.
35546 - Add a maintainer script to tell us which options are missing
35547 documentation: "make check-docs".
35548 - Add a new address-spec.txt document to describe our special-case
35549 addresses: .exit, .onion, and .noconnnect.
35551 o Minor features (DNS):
35552 - Ongoing work on eventdns infrastructure: now it has dns server
35553 and ipv6 support. One day Tor will make use of it.
35554 - Add client-side caching for reverse DNS lookups.
35555 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
35556 - When we change nameservers or IP addresses, reset and re-launch
35557 our tests for DNS hijacking.
35559 o Minor features (directory):
35560 - Authorities now specify server versions in networkstatus. This adds
35561 about 2% to the size of compressed networkstatus docs, and allows
35562 clients to tell which servers support BEGIN_DIR and which don't.
35563 The implementation is forward-compatible with a proposed future
35564 protocol version scheme not tied to Tor versions.
35565 - DirServer configuration lines now have an orport= option so
35566 clients can open encrypted tunnels to the authorities without
35567 having downloaded their descriptors yet. Enabled for moria1,
35568 moria2, tor26, and lefkada now in the default configuration.
35569 - Directory servers are more willing to send a 503 "busy" if they
35570 are near their write limit, especially for v1 directory requests.
35571 Now they can use their limited bandwidth for actual Tor traffic.
35572 - Clients track responses with status 503 from dirservers. After a
35573 dirserver has given us a 503, we try not to use it until an hour has
35574 gone by, or until we have no dirservers that haven't given us a 503.
35575 - When we get a 503 from a directory, and we're not a server, we don't
35576 count the failure against the total number of failures allowed
35577 for the thing we're trying to download.
35578 - Report X-Your-Address-Is correctly from tunneled directory
35579 connections; don't report X-Your-Address-Is when it's an internal
35580 address; and never believe reported remote addresses when they're
35582 - Protect against an unlikely DoS attack on directory servers.
35583 - Add a BadDirectory flag to network status docs so that authorities
35584 can (eventually) tell clients about caches they believe to be
35587 o Minor features (controller):
35588 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
35589 - Reimplement GETINFO so that info/names stays in sync with the
35591 - Implement "GETINFO fingerprint".
35592 - Implement "SETEVENTS GUARD" so controllers can get updates on
35593 entry guard status as it changes.
35595 o Minor features (clean up obsolete pieces):
35596 - Remove some options that have been deprecated since at least
35597 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
35598 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
35599 to set log options.
35600 - We no longer look for identity and onion keys in "identity.key" and
35601 "onion.key" -- these were replaced by secret_id_key and
35602 secret_onion_key in 0.0.8pre1.
35603 - We no longer require unrecognized directory entries to be
35606 o Major bugfixes (security):
35607 - Stop sending the HttpProxyAuthenticator string to directory
35608 servers when directory connections are tunnelled through Tor.
35609 - Clients no longer store bandwidth history in the state file.
35610 - Do not log introduction points for hidden services if SafeLogging
35612 - When generating bandwidth history, round down to the nearest
35613 1k. When storing accounting data, round up to the nearest 1k.
35614 - When we're running as a server, remember when we last rotated onion
35615 keys, so that we will rotate keys once they're a week old even if
35616 we never stay up for a week ourselves.
35618 o Major bugfixes (other):
35619 - Fix a longstanding bug in eventdns that prevented the count of
35620 timed-out resolves from ever being reset. This bug caused us to
35621 give up on a nameserver the third time it timed out, and try it
35622 10 seconds later... and to give up on it every time it timed out
35624 - Take out the '5 second' timeout from the connection retry
35625 schedule. Now the first connect attempt will wait a full 10
35626 seconds before switching to a new circuit. Perhaps this will help
35627 a lot. Based on observations from Mike Perry.
35628 - Fix a bug on the Windows implementation of tor_mmap_file() that
35629 would prevent the cached-routers file from ever loading. Reported
35633 - Fix an assert failure when a directory authority sets
35634 AuthDirRejectUnlisted and then receives a descriptor from an
35635 unlisted router. Reported by seeess.
35636 - Avoid a double-free when parsing malformed DirServer lines.
35637 - Fix a bug when a BSD-style PF socket is first used. Patch from
35639 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
35640 to resolve an address at a given exit node even when they ask for
35642 - Servers no longer ever list themselves in their "family" line,
35643 even if configured to do so. This makes it easier to configure
35644 family lists conveniently.
35645 - When running as a server, don't fall back to 127.0.0.1 when no
35646 nameservers are configured in /etc/resolv.conf; instead, make the
35647 user fix resolv.conf or specify nameservers explicitly. (Resolves
35649 - Stop accepting certain malformed ports in configured exit policies.
35650 - Don't re-write the fingerprint file every restart, unless it has
35652 - Stop warning when a single nameserver fails: only warn when _all_ of
35653 our nameservers have failed. Also, when we only have one nameserver,
35654 raise the threshold for deciding that the nameserver is dead.
35655 - Directory authorities now only decide that routers are reachable
35656 if their identity keys are as expected.
35657 - When the user uses bad syntax in the Log config line, stop
35658 suggesting other bad syntax as a replacement.
35659 - Correctly detect ipv6 DNS capability on OpenBSD.
35661 o Minor bugfixes (controller):
35662 - Report the circuit number correctly in STREAM CLOSED events. Bug
35663 reported by Mike Perry.
35664 - Do not report bizarre values for results of accounting GETINFOs
35665 when the last second's write or read exceeds the allotted bandwidth.
35666 - Report "unrecognized key" rather than an empty string when the
35667 controller tries to fetch a networkstatus that doesn't exist.
35670 Changes in version 0.1.1.26 - 2006-12-14
35671 o Security bugfixes:
35672 - Stop sending the HttpProxyAuthenticator string to directory
35673 servers when directory connections are tunnelled through Tor.
35674 - Clients no longer store bandwidth history in the state file.
35675 - Do not log introduction points for hidden services if SafeLogging
35679 - Fix an assert failure when a directory authority sets
35680 AuthDirRejectUnlisted and then receives a descriptor from an
35681 unlisted router (reported by seeess).
35684 Changes in version 0.1.2.4-alpha - 2006-12-03
35686 - Add support for using natd; this allows FreeBSDs earlier than
35687 5.1.2 to have ipfw send connections through Tor without using
35688 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
35691 - Make all connections to addresses of the form ".noconnect"
35692 immediately get closed. This lets application/controller combos
35693 successfully test whether they're talking to the same Tor by
35694 watching for STREAM events.
35695 - Make cross.sh cross-compilation script work even when autogen.sh
35696 hasn't been run. (Patch from Michael Mohr.)
35697 - Statistics dumped by -USR2 now include a breakdown of public key
35698 operations, for profiling.
35701 - Fix a major leak when directory authorities parse their
35702 approved-routers list, a minor memory leak when we fail to pick
35703 an exit node, and a few rare leaks on errors.
35704 - Handle TransPort connections even when the server sends data before
35705 the client sends data. Previously, the connection would just hang
35706 until the client sent data. (Patch from tup based on patch from
35708 - Avoid assert failure when our cached-routers file is empty on
35712 - Don't log spurious warnings when we see a circuit close reason we
35713 don't recognize; it's probably just from a newer version of Tor.
35714 - Have directory authorities allow larger amounts of drift in uptime
35715 without replacing the server descriptor: previously, a server that
35716 restarted every 30 minutes could have 48 "interesting" descriptors
35718 - Start linking to the Tor specification and Tor reference manual
35719 correctly in the Windows installer.
35720 - Add Vidalia to the OS X uninstaller script, so when we uninstall
35721 Tor/Privoxy we also uninstall Vidalia.
35722 - Resume building on Irix64, and fix a lot of warnings from its
35723 MIPSpro C compiler.
35724 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
35725 when we're running as a client.
35728 Changes in version 0.1.1.25 - 2006-11-04
35730 - When a client asks us to resolve (rather than connect to)
35731 an address, and we have a cached answer, give them the cached
35732 answer. Previously, we would give them no answer at all.
35733 - We were building exactly the wrong circuits when we predict
35734 hidden service requirements, meaning Tor would have to build all
35735 its circuits on demand.
35736 - If none of our live entry guards have a high uptime, but we
35737 require a guard with a high uptime, try adding a new guard before
35738 we give up on the requirement. This patch should make long-lived
35739 connections more stable on average.
35740 - When testing reachability of our DirPort, don't launch new
35741 tests when there's already one in progress -- unreachable
35742 servers were stacking up dozens of testing streams.
35744 o Security bugfixes:
35745 - When the user sends a NEWNYM signal, clear the client-side DNS
35746 cache too. Otherwise we continue to act on previous information.
35749 - Avoid a memory corruption bug when creating a hash table for
35751 - Avoid possibility of controller-triggered crash when misusing
35752 certain commands from a v0 controller on platforms that do not
35753 handle printf("%s",NULL) gracefully.
35754 - Avoid infinite loop on unexpected controller input.
35755 - Don't log spurious warnings when we see a circuit close reason we
35756 don't recognize; it's probably just from a newer version of Tor.
35757 - Add Vidalia to the OS X uninstaller script, so when we uninstall
35758 Tor/Privoxy we also uninstall Vidalia.
35761 Changes in version 0.1.2.3-alpha - 2006-10-29
35763 - Prepare for servers to publish descriptors less often: never
35764 discard a descriptor simply for being too old until either it is
35765 recommended by no authorities, or until we get a better one for
35766 the same router. Make caches consider retaining old recommended
35767 routers for even longer.
35768 - If most authorities set a BadExit flag for a server, clients
35769 don't think of it as a general-purpose exit. Clients only consider
35770 authorities that advertise themselves as listing bad exits.
35771 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
35772 headers for content, so that we can work better in the presence of
35773 caching HTTP proxies.
35774 - Allow authorities to list nodes as bad exits by fingerprint or by
35777 o Minor features, controller:
35778 - Add a REASON field to CIRC events; for backward compatibility, this
35779 field is sent only to controllers that have enabled the extended
35780 event format. Also, add additional reason codes to explain why
35781 a given circuit has been destroyed or truncated. (Patches from
35783 - Add a REMOTE_REASON field to extended CIRC events to tell the
35784 controller about why a remote OR told us to close a circuit.
35785 - Stream events also now have REASON and REMOTE_REASON fields,
35786 working much like those for circuit events.
35787 - There's now a GETINFO ns/... field so that controllers can ask Tor
35788 about the current status of a router.
35789 - A new event type "NS" to inform a controller when our opinion of
35790 a router's status has changed.
35791 - Add a GETINFO events/names and GETINFO features/names so controllers
35792 can tell which events and features are supported.
35793 - A new CLEARDNSCACHE signal to allow controllers to clear the
35794 client-side DNS cache without expiring circuits.
35796 o Security bugfixes:
35797 - When the user sends a NEWNYM signal, clear the client-side DNS
35798 cache too. Otherwise we continue to act on previous information.
35801 - Avoid sending junk to controllers or segfaulting when a controller
35802 uses EVENT_NEW_DESC with verbose nicknames.
35803 - Stop triggering asserts if the controller tries to extend hidden
35804 service circuits (reported by mwenge).
35805 - Avoid infinite loop on unexpected controller input.
35806 - When the controller does a "GETINFO network-status", tell it
35807 about even those routers whose descriptors are very old, and use
35808 long nicknames where appropriate.
35809 - Change NT service functions to be loaded on demand. This lets us
35810 build with MinGW without breaking Tor for Windows 98 users.
35811 - Do DirPort reachability tests less often, since a single test
35812 chews through many circuits before giving up.
35813 - In the hidden service example in torrc.sample, stop recommending
35814 esoteric and discouraged hidden service options.
35815 - When stopping an NT service, wait up to 10 sec for it to actually
35816 stop. Patch from Matt Edman; resolves bug 295.
35817 - Fix handling of verbose nicknames with ORCONN controller events:
35818 make them show up exactly when requested, rather than exactly when
35820 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
35821 printing a duplicate "$" in the keys we send (reported by mwenge).
35822 - Correctly set maximum connection limit on Cygwin. (This time
35824 - Try to detect Windows correctly when cross-compiling.
35825 - Detect the size of the routers file correctly even if it is
35826 corrupted (on systems without mmap) or not page-aligned (on systems
35827 with mmap). This bug was harmless.
35828 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
35829 to open a stream fails; now we do in more cases. This should
35830 make clients able to find a good exit faster in some cases, since
35831 unhandleable requests will now get an error rather than timing out.
35832 - Resolve two memory leaks when rebuilding the on-disk router cache
35833 (reported by fookoowa).
35834 - Clean up minor code warnings suggested by the MIPSpro C compiler,
35835 and reported by some Centos users.
35836 - Controller signals now work on non-Unix platforms that don't define
35837 SIGUSR1 and SIGUSR2 the way we expect.
35838 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
35839 values before failing, and always enables eventdns.
35840 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
35841 Try to fix this in configure.in by checking for most functions
35842 before we check for libevent.
35845 Changes in version 0.1.2.2-alpha - 2006-10-07
35847 - Make our async eventdns library on-by-default for Tor servers,
35848 and plan to deprecate the separate dnsworker threads.
35849 - Add server-side support for "reverse" DNS lookups (using PTR
35850 records so clients can determine the canonical hostname for a given
35851 IPv4 address). Only supported by servers using eventdns; servers
35852 now announce in their descriptors whether they support eventdns.
35853 - Specify and implement client-side SOCKS5 interface for reverse DNS
35854 lookups (see doc/socks-extensions.txt).
35855 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
35856 connect to directory servers through Tor. Previously, clients needed
35857 to find Tor exits to make private connections to directory servers.
35858 - Avoid choosing Exit nodes for entry or middle hops when the
35859 total bandwidth available from non-Exit nodes is much higher than
35860 the total bandwidth available from Exit nodes.
35861 - Workaround for name servers (like Earthlink's) that hijack failing
35862 DNS requests and replace the no-such-server answer with a "helpful"
35863 redirect to an advertising-driven search portal. Also work around
35864 DNS hijackers who "helpfully" decline to hijack known-invalid
35865 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
35866 lets you turn it off.
35867 - Send out a burst of long-range padding cells once we've established
35868 that we're reachable. Spread them over 4 circuits, so hopefully
35869 a few will be fast. This exercises our bandwidth and bootstraps
35870 us into the directory more quickly.
35872 o New/improved config options:
35873 - Add new config option "ResolvConf" to let the server operator
35874 choose an alternate resolve.conf file when using eventdns.
35875 - Add an "EnforceDistinctSubnets" option to control our "exclude
35876 servers on the same /16" behavior. It's still on by default; this
35877 is mostly for people who want to operate private test networks with
35878 all the machines on the same subnet.
35879 - If one of our entry guards is on the ExcludeNodes list, or the
35880 directory authorities don't think it's a good guard, treat it as
35881 if it were unlisted: stop using it as a guard, and throw it off
35882 the guards list if it stays that way for a long time.
35883 - Allow directory authorities to be marked separately as authorities
35884 for the v1 directory protocol, the v2 directory protocol, and
35885 as hidden service directories, to make it easier to retire old
35886 authorities. V1 authorities should set "HSAuthoritativeDir 1"
35887 to continue being hidden service authorities too.
35888 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
35890 o Minor features, controller:
35891 - Fix CIRC controller events so that controllers can learn the
35892 identity digests of non-Named servers used in circuit paths.
35893 - Let controllers ask for more useful identifiers for servers. Instead
35894 of learning identity digests for un-Named servers and nicknames
35895 for Named servers, the new identifiers include digest, nickname,
35896 and indication of Named status. Off by default; see control-spec.txt
35897 for more information.
35898 - Add a "getinfo address" controller command so it can display Tor's
35899 best guess to the user.
35900 - New controller event to alert the controller when our server
35901 descriptor has changed.
35902 - Give more meaningful errors on controller authentication failure.
35904 o Minor features, other:
35905 - When asked to resolve a hostname, don't use non-exit servers unless
35906 requested to do so. This allows servers with broken DNS to be
35907 useful to the network.
35908 - Divide eventdns log messages into warn and info messages.
35909 - Reserve the nickname "Unnamed" for routers that can't pick
35910 a hostname: any router can call itself Unnamed; directory
35911 authorities will never allocate Unnamed to any particular router;
35912 clients won't believe that any router is the canonical Unnamed.
35913 - Only include function names in log messages for info/debug messages.
35914 For notice/warn/err, the content of the message should be clear on
35915 its own, and printing the function name only confuses users.
35916 - Avoid some false positives during reachability testing: don't try
35917 to test via a server that's on the same /24 as us.
35918 - If we fail to build a circuit to an intended enclave, and it's
35919 not mandatory that we use that enclave, stop wanting it.
35920 - When eventdns is enabled, allow multithreaded builds on NetBSD and
35921 OpenBSD. (We had previously disabled threads on these platforms
35922 because they didn't have working thread-safe resolver functions.)
35924 o Major bugfixes, anonymity/security:
35925 - If a client asked for a server by name, and there's a named server
35926 in our network-status but we don't have its descriptor yet, we
35927 could return an unnamed server instead.
35928 - Fix NetBSD bug that could allow someone to force uninitialized RAM
35929 to be sent to a server's DNS resolver. This only affects NetBSD
35930 and other platforms that do not bounds-check tolower().
35931 - Reject (most) attempts to use Tor circuits with length one. (If
35932 many people start using Tor as a one-hop proxy, exit nodes become
35933 a more attractive target for compromise.)
35934 - Just because your DirPort is open doesn't mean people should be
35935 able to remotely teach you about hidden service descriptors. Now
35936 only accept rendezvous posts if you've got HSAuthoritativeDir set.
35938 o Major bugfixes, other:
35939 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
35940 - When a client asks the server to resolve (not connect to)
35941 an address, and it has a cached answer, give them the cached answer.
35942 Previously, the server would give them no answer at all.
35943 - Allow really slow clients to not hang up five minutes into their
35944 directory downloads (suggested by Adam J. Richter).
35945 - We were building exactly the wrong circuits when we anticipated
35946 hidden service requirements, meaning Tor would have to build all
35947 its circuits on demand.
35948 - Avoid crashing when we mmap a router cache file of size 0.
35949 - When testing reachability of our DirPort, don't launch new
35950 tests when there's already one in progress -- unreachable
35951 servers were stacking up dozens of testing streams.
35953 o Minor bugfixes, correctness:
35954 - If we're a directory mirror and we ask for "all" network status
35955 documents, we would discard status documents from authorities
35956 we don't recognize.
35957 - Avoid a memory corruption bug when creating a hash table for
35959 - Avoid controller-triggered crash when misusing certain commands
35960 from a v0 controller on platforms that do not handle
35961 printf("%s",NULL) gracefully.
35962 - Don't crash when a controller sends a third argument to an
35963 "extendcircuit" request.
35964 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
35965 response; fix error code when "getinfo dir/status/" fails.
35966 - Avoid crash when telling controller stream-status and a stream
35968 - Patch from Adam Langley to fix assert() in eventdns.c.
35969 - Fix a debug log message in eventdns to say "X resolved to Y"
35970 instead of "X resolved to X".
35971 - Make eventdns give strings for DNS errors, not just error numbers.
35972 - Track unreachable entry guards correctly: don't conflate
35973 'unreachable by us right now' with 'listed as down by the directory
35974 authorities'. With the old code, if a guard was unreachable by
35975 us but listed as running, it would clog our guard list forever.
35976 - Behave correctly in case we ever have a network with more than
35977 2GB/s total advertised capacity.
35978 - Make TrackExitHosts case-insensitive, and fix the behavior of
35979 ".suffix" TrackExitHosts items to avoid matching in the middle of
35981 - Finally fix the openssl warnings from newer gccs that believe that
35982 ignoring a return value is okay, but casting a return value and
35983 then ignoring it is a sign of madness.
35984 - Prevent the contrib/exitlist script from printing the same
35985 result more than once.
35986 - Patch from Steve Hildrey: Generate network status correctly on
35987 non-versioning dirservers.
35988 - Don't listen to the X-Your-Address-Is hint if you did the lookup
35989 via Tor; otherwise you'll think you're the exit node's IP address.
35991 o Minor bugfixes, performance:
35992 - Two small performance improvements on parsing descriptors.
35993 - Major performance improvement on inserting descriptors: change
35994 algorithm from O(n^2) to O(n).
35995 - Make the common memory allocation path faster on machines where
35996 malloc(0) returns a pointer.
35997 - Start remembering X-Your-Address-Is directory hints even if you're
35998 a client, so you can become a server more smoothly.
35999 - Avoid duplicate entries on MyFamily line in server descriptor.
36001 o Packaging, features:
36002 - Remove architecture from OS X builds. The official builds are
36003 now universal binaries.
36004 - The Debian package now uses --verify-config when (re)starting,
36005 to distinguish configuration errors from other errors.
36006 - Update RPMs to require libevent 1.1b.
36008 o Packaging, bugfixes:
36009 - Patches so Tor builds with MinGW on Windows.
36010 - Patches so Tor might run on Cygwin again.
36011 - Resume building on non-gcc compilers and ancient gcc. Resume
36012 building with the -O0 compile flag. Resume building cleanly on
36014 - Run correctly on OS X platforms with case-sensitive filesystems.
36015 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
36016 - Add autoconf checks so Tor can build on Solaris x86 again.
36019 - Documented (and renamed) ServerDNSSearchDomains and
36020 ServerDNSResolvConfFile options.
36021 - Be clearer that the *ListenAddress directives can be repeated
36025 Changes in version 0.1.1.24 - 2006-09-29
36027 - Allow really slow clients to not hang up five minutes into their
36028 directory downloads (suggested by Adam J. Richter).
36029 - Fix major performance regression from 0.1.0.x: instead of checking
36030 whether we have enough directory information every time we want to
36031 do something, only check when the directory information has changed.
36032 This should improve client CPU usage by 25-50%.
36033 - Don't crash if, after a server has been running for a while,
36034 it can't resolve its hostname.
36037 - Allow Tor to start when RunAsDaemon is set but no logs are set.
36038 - Don't crash when the controller receives a third argument to an
36039 "extendcircuit" request.
36040 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
36041 response; fix error code when "getinfo dir/status/" fails.
36042 - Fix configure.in to not produce broken configure files with
36043 more recent versions of autoconf. Thanks to Clint for his auto*
36045 - Fix security bug on NetBSD that could allow someone to force
36046 uninitialized RAM to be sent to a server's DNS resolver. This
36047 only affects NetBSD and other platforms that do not bounds-check
36049 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
36050 methods: these are known to be buggy.
36051 - If we're a directory mirror and we ask for "all" network status
36052 documents, we would discard status documents from authorities
36053 we don't recognize.
36056 Changes in version 0.1.2.1-alpha - 2006-08-27
36058 - Add "eventdns" async dns library from Adam Langley, tweaked to
36059 build on OSX and Windows. Only enabled if you pass the
36060 --enable-eventdns argument to configure.
36061 - Allow servers with no hostname or IP address to learn their
36062 IP address by asking the directory authorities. This code only
36063 kicks in when you would normally have exited with a "no address"
36064 error. Nothing's authenticated, so use with care.
36065 - Rather than waiting a fixed amount of time between retrying
36066 application connections, we wait only 5 seconds for the first,
36067 10 seconds for the second, and 15 seconds for each retry after
36068 that. Hopefully this will improve the expected user experience.
36069 - Patch from Tup to add support for transparent AP connections:
36070 this basically bundles the functionality of trans-proxy-tor
36071 into the Tor mainline. Now hosts with compliant pf/netfilter
36072 implementations can redirect TCP connections straight to Tor
36073 without diverting through SOCKS. Needs docs.
36074 - Busy directory servers save lots of memory by spooling server
36075 descriptors, v1 directories, and v2 networkstatus docs to buffers
36076 as needed rather than en masse. Also mmap the cached-routers
36077 files, so we don't need to keep the whole thing in memory too.
36078 - Automatically avoid picking more than one node from the same
36079 /16 network when constructing a circuit.
36080 - Revise and clean up the torrc.sample that we ship with; add
36081 a section for BandwidthRate and BandwidthBurst.
36084 - Split circuit_t into origin_circuit_t and or_circuit_t, and
36085 split connection_t into edge, or, dir, control, and base structs.
36086 These will save quite a bit of memory on busy servers, and they'll
36087 also help us track down bugs in the code and bugs in the spec.
36088 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
36089 or later. Log when we are doing this, so we can diagnose it when
36090 it fails. (Also, recommend libevent 1.1b for kqueue and
36091 win32 methods; deprecate libevent 1.0b harder; make libevent
36092 recommendation system saner.)
36093 - Start being able to build universal binaries on OS X (thanks
36095 - Export the default exit policy via the control port, so controllers
36096 don't need to guess what it is / will be later.
36097 - Add a man page entry for ProtocolWarnings.
36098 - Add TestVia config option to the man page.
36099 - Remove even more protocol-related warnings from Tor server logs,
36100 such as bad TLS handshakes and malformed begin cells.
36101 - Stop fetching descriptors if you're not a dir mirror and you
36102 haven't tried to establish any circuits lately. [This currently
36103 causes some dangerous behavior, because when you start up again
36104 you'll use your ancient server descriptors.]
36105 - New DirPort behavior: if you have your dirport set, you download
36106 descriptors aggressively like a directory mirror, whether or not
36107 your ORPort is set.
36108 - Get rid of the router_retry_connections notion. Now routers
36109 no longer try to rebuild long-term connections to directory
36110 authorities, and directory authorities no longer try to rebuild
36111 long-term connections to all servers. We still don't hang up
36112 connections in these two cases though -- we need to look at it
36113 more carefully to avoid flapping, and we likely need to wait til
36114 0.1.1.x is obsolete.
36115 - Drop compatibility with obsolete Tors that permit create cells
36116 to have the wrong circ_id_type.
36117 - Re-enable per-connection rate limiting. Get rid of the "OP
36118 bandwidth" concept. Lay groundwork for "bandwidth classes" --
36119 separate global buckets that apply depending on what sort of conn
36121 - Start publishing one minute or so after we find our ORPort
36122 to be reachable. This will help reduce the number of descriptors
36123 we have for ourselves floating around, since it's quite likely
36124 other things (e.g. DirPort) will change during that minute too.
36125 - Fork the v1 directory protocol into its own spec document,
36126 and mark dir-spec.txt as the currently correct (v2) spec.
36129 - When we find our DirPort to be reachable, publish a new descriptor
36130 so we'll tell the world (reported by pnx).
36131 - Publish a new descriptor after we hup/reload. This is important
36132 if our config has changed such that we'll want to start advertising
36133 our DirPort now, etc.
36134 - Allow Tor to start when RunAsDaemon is set but no logs are set.
36135 - When we have a state file we cannot parse, tell the user and
36136 move it aside. Now we avoid situations where the user starts
36137 Tor in 1904, Tor writes a state file with that timestamp in it,
36138 the user fixes her clock, and Tor refuses to start.
36139 - Fix configure.in to not produce broken configure files with
36140 more recent versions of autoconf. Thanks to Clint for his auto*
36142 - "tor --verify-config" now exits with -1(255) or 0 depending on
36143 whether the config options are bad or good.
36144 - Resolve bug 321 when using dnsworkers: append a period to every
36145 address we resolve at the exit node, so that we do not accidentally
36146 pick up local addresses, and so that failing searches are retried
36147 in the resolver search domains. (This is already solved for
36148 eventdns.) (This breaks Blossom servers for now.)
36149 - If we are using an exit enclave and we can't connect, e.g. because
36150 its webserver is misconfigured to not listen on localhost, then
36151 back off and try connecting from somewhere else before we fail.
36154 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
36155 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
36156 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
36157 when the IP address is mapped through MapAddress to a hostname.
36158 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
36159 useless IPv6 DNS resolves.
36160 - Patch suggested by Karsten Loesing: respond to SIGNAL command
36161 before we execute the signal, in case the signal shuts us down.
36162 - Clean up AllowInvalidNodes man page entry.
36163 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
36164 - Add more asserts to track down an assert error on a windows Tor
36165 server with connection_add being called with socket == -1.
36166 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
36167 - Fix misleading log messages: an entry guard that is "unlisted",
36168 as well as not known to be "down" (because we've never heard
36169 of it), is not therefore "up".
36170 - Remove code to special-case "-cvs" ending, since it has not
36171 actually mattered since 0.0.9.
36172 - Make our socks5 handling more robust to broken socks clients:
36173 throw out everything waiting on the buffer in between socks
36174 handshake phases, since they can't possibly (so the theory
36175 goes) have predicted what we plan to respond to them.
36178 Changes in version 0.1.1.23 - 2006-07-30
36180 - Fast Tor servers, especially exit nodes, were triggering asserts
36181 due to a bug in handling the list of pending DNS resolves. Some
36182 bugs still remain here; we're hunting them.
36183 - Entry guards could crash clients by sending unexpected input.
36184 - More fixes on reachability testing: if you find yourself reachable,
36185 then don't ever make any client requests (so you stop predicting
36186 circuits), then hup or have your clock jump, then later your IP
36187 changes, you won't think circuits are working, so you won't try to
36188 test reachability, so you won't publish.
36191 - Avoid a crash if the controller does a resetconf firewallports
36192 and then a setconf fascistfirewall=1.
36193 - Avoid an integer underflow when the dir authority decides whether
36194 a router is stable: we might wrongly label it stable, and compute
36195 a slightly wrong median stability, when a descriptor is published
36197 - Fix a place where we might trigger an assert if we can't build our
36198 own server descriptor yet.
36201 Changes in version 0.1.1.22 - 2006-07-05
36203 - Fix a big bug that was causing servers to not find themselves
36204 reachable if they changed IP addresses. Since only 0.1.1.22+
36205 servers can do reachability testing correctly, now we automatically
36206 make sure to test via one of these.
36207 - Fix to allow clients and mirrors to learn directory info from
36208 descriptor downloads that get cut off partway through.
36209 - Directory authorities had a bug in deciding if a newly published
36210 descriptor was novel enough to make everybody want a copy -- a few
36211 servers seem to be publishing new descriptors many times a minute.
36213 - Fix a rare bug that was causing some servers to complain about
36214 "closing wedged cpuworkers" and skip some circuit create requests.
36215 - Make the Exit flag in directory status documents actually work.
36218 Changes in version 0.1.1.21 - 2006-06-10
36219 o Crash and assert fixes from 0.1.1.20:
36220 - Fix a rare crash on Tor servers that have enabled hibernation.
36221 - Fix a seg fault on startup for Tor networks that use only one
36222 directory authority.
36223 - Fix an assert from a race condition that occurs on Tor servers
36224 while exiting, where various threads are trying to log that they're
36225 exiting, and delete the logs, at the same time.
36226 - Make our unit tests pass again on certain obscure platforms.
36229 - Add support for building SUSE RPM packages.
36230 - Speed up initial bootstrapping for clients: if we are making our
36231 first ever connection to any entry guard, then don't mark it down
36233 - When only one Tor server in the network is labelled as a guard,
36234 and we've already picked him, we would cycle endlessly picking him
36235 again, being unhappy about it, etc. Now we specifically exclude
36236 current guards when picking a new guard.
36237 - Servers send create cells more reliably after the TLS connection
36238 is established: we were sometimes forgetting to send half of them
36239 when we had more than one pending.
36240 - If we get a create cell that asks us to extend somewhere, but the
36241 Tor server there doesn't match the expected digest, we now send
36242 a destroy cell back, rather than silently doing nothing.
36243 - Make options->RedirectExit work again.
36244 - Make cookie authentication for the controller work again.
36245 - Stop being picky about unusual characters in the arguments to
36246 mapaddress. It's none of our business.
36247 - Add a new config option "TestVia" that lets you specify preferred
36248 middle hops to use for test circuits. Perhaps this will let me
36249 debug the reachability problems better.
36251 o Log / documentation fixes:
36252 - If we're a server and some peer has a broken TLS certificate, don't
36253 log about it unless ProtocolWarnings is set, i.e., we want to hear
36254 about protocol violations by others.
36255 - Fix spelling of VirtualAddrNetwork in man page.
36256 - Add a better explanation at the top of the autogenerated torrc file
36257 about what happened to our old torrc.
36260 Changes in version 0.1.1.20 - 2006-05-23
36262 - Downgrade a log severity where servers complain that they're
36264 - Avoid a compile warning on FreeBSD.
36265 - Remove string size limit on NEWDESC messages; solve bug 291.
36266 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
36267 more thoroughly when we're running on windows.
36270 Changes in version 0.1.1.19-rc - 2006-05-03
36272 - Regenerate our local descriptor if it's dirty and we try to use
36273 it locally (e.g. if it changes during reachability detection).
36274 - If we setconf our ORPort to 0, we continued to listen on the
36275 old ORPort and receive connections.
36276 - Avoid a second warning about machine/limits.h on Debian
36278 - Be willing to add our own routerinfo into the routerlist.
36279 Now authorities will include themselves in their directories
36280 and network-statuses.
36281 - Stop trying to upload rendezvous descriptors to every
36282 directory authority: only try the v1 authorities.
36283 - Servers no longer complain when they think they're not
36284 registered with the directory authorities. There were too many
36286 - Backport dist-rpm changes so rpms can be built without errors.
36289 - Implement an option, VirtualAddrMask, to set which addresses
36290 get handed out in response to mapaddress requests. This works
36291 around a bug in tsocks where 127.0.0.0/8 is never socksified.
36294 Changes in version 0.1.1.18-rc - 2006-04-10
36296 - Work harder to download live network-statuses from all the
36297 directory authorities we know about. Improve the threshold
36298 decision logic so we're more robust to edge cases.
36299 - When fetching rendezvous descriptors, we were willing to ask
36300 v2 authorities too, which would always return 404.
36303 - Stop listing down or invalid nodes in the v1 directory. This will
36304 reduce its bulk by about 1/3, and reduce load on directory
36306 - When deciding whether a router is Fast or Guard-worthy, consider
36307 his advertised BandwidthRate and not just the BandwidthCapacity.
36308 - No longer ship INSTALL and README files -- they are useless now.
36309 - Force rpmbuild to behave and honor target_cpu.
36310 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
36311 - Start to include translated versions of the tor-doc-*.html
36312 files, along with the screenshots. Still needs more work.
36313 - Start sending back 512 and 451 errors if mapaddress fails,
36314 rather than not sending anything back at all.
36315 - When we fail to bind or listen on an incoming or outgoing
36316 socket, we should close it before failing. otherwise we just
36317 leak it. (thanks to weasel for finding.)
36318 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
36319 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
36320 - Make NoPublish (even though deprecated) work again.
36321 - Fix a minor security flaw where a versioning auth dirserver
36322 could list a recommended version many times in a row to make
36323 clients more convinced that it's recommended.
36324 - Fix crash bug if there are two unregistered servers running
36325 with the same nickname, one of them is down, and you ask for
36326 them by nickname in your EntryNodes or ExitNodes. Also, try
36327 to pick the one that's running rather than an arbitrary one.
36328 - Fix an infinite loop we could hit if we go offline for too long.
36329 - Complain when we hit WSAENOBUFS on recv() or write() too.
36330 Perhaps this will help us hunt the bug.
36331 - If you're not a versioning dirserver, don't put the string
36332 "client-versions \nserver-versions \n" in your network-status.
36333 - Lower the minimum required number of file descriptors to 1000,
36334 so we can have some overhead for Valgrind on Linux, where the
36335 default ulimit -n is 1024.
36338 - Add tor.dizum.com as the fifth authoritative directory server.
36339 - Add a new config option FetchUselessDescriptors, off by default,
36340 for when you plan to run "exitlist" on your client and you want
36341 to know about even the non-running descriptors.
36344 Changes in version 0.1.1.17-rc - 2006-03-28
36346 - Clients and servers since 0.1.1.10-alpha have been expiring
36347 connections whenever they are idle for 5 minutes and they *do*
36348 have circuits on them. Oops. With this new version, clients will
36349 discard their previous entry guard choices and avoid choosing
36350 entry guards running these flawed versions.
36351 - Fix memory leak when uncompressing concatenated zlib streams. This
36352 was causing substantial leaks over time on Tor servers.
36353 - The v1 directory was including servers as much as 48 hours old,
36354 because that's how the new routerlist->routers works. Now only
36355 include them if they're 20 hours old or less.
36358 - Resume building on irix64, netbsd 2.0, etc.
36359 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
36361 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
36362 and it is confusing some users.
36363 - Mirrors stop caching the v1 directory so often.
36364 - Make the max number of old descriptors that a cache will hold
36365 rise with the number of directory authorities, so we can scale.
36366 - Change our win32 uname() hack to be more forgiving about what
36367 win32 versions it thinks it's found.
36370 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
36372 - When the controller's *setconf commands fail, collect an error
36373 message in a string and hand it back to the controller.
36374 - Make the v2 dir's "Fast" flag based on relative capacity, just
36375 like "Stable" is based on median uptime. Name everything in the
36376 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
36377 - Log server fingerprint on startup, so new server operators don't
36378 have to go hunting around their filesystem for it.
36379 - Return a robots.txt on our dirport to discourage google indexing.
36380 - Let the controller ask for GETINFO dir/status/foo so it can ask
36381 directly rather than connecting to the dir port. Only works when
36382 dirport is set for now.
36384 o New config options rather than constants in the code:
36385 - SocksTimeout: How long do we let a socks connection wait
36386 unattached before we fail it?
36387 - CircuitBuildTimeout: Cull non-open circuits that were born
36388 at least this many seconds ago.
36389 - CircuitIdleTimeout: Cull open clean circuits that were born
36390 at least this many seconds ago.
36393 Changes in version 0.1.1.16-rc - 2006-03-18
36394 o Bugfixes on 0.1.1.15-rc:
36395 - Fix assert when the controller asks to attachstream a connect-wait
36396 or resolve-wait stream.
36397 - Now do address rewriting when the controller asks us to attach
36398 to a particular circuit too. This will let Blossom specify
36399 "moria2.exit" without having to learn what moria2's IP address is.
36400 - Make the "tor --verify-config" command-line work again, so people
36401 can automatically check if their torrc will parse.
36402 - Authoritative dirservers no longer require an open connection from
36403 a server to consider him "reachable". We need this change because
36404 when we add new auth dirservers, old servers won't know not to
36406 - Let Tor build on Sun CC again.
36407 - Fix an off-by-one buffer size in dirserv.c that magically never
36408 hit our three authorities but broke sjmurdoch's own tor network.
36409 - If we as a directory mirror don't know of any v1 directory
36410 authorities, then don't try to cache any v1 directories.
36411 - Stop warning about unknown servers in our family when they are
36412 given as hex digests.
36413 - Stop complaining as quickly to the server operator that he
36414 hasn't registered his nickname/key binding.
36415 - Various cleanups so we can add new V2 Auth Dirservers.
36416 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
36417 reflect the updated flags in our v2 dir protocol.
36418 - Resume allowing non-printable characters for exit streams (both
36419 for connecting and for resolving). Now we tolerate applications
36420 that don't follow the RFCs. But continue to block malformed names
36423 o Bugfixes on 0.1.0.x:
36424 - Fix assert bug in close_logs(): when we close and delete logs,
36425 remove them all from the global "logfiles" list.
36426 - Fix minor integer overflow in calculating when we expect to use up
36427 our bandwidth allocation before hibernating.
36428 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
36429 there are multiple SSLs installed with different versions.
36430 - When we try to be a server and Address is not explicitly set and
36431 our hostname resolves to a private IP address, try to use an
36432 interface address if it has a public address. Now Windows machines
36433 that think of themselves as localhost can work by default.
36436 - Let the controller ask for GETINFO dir/server/foo so it can ask
36437 directly rather than connecting to the dir port.
36438 - Let the controller tell us about certain router descriptors
36439 that it doesn't want Tor to use in circuits. Implement
36440 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
36441 - New config option SafeSocks to reject all application connections
36442 using unsafe socks protocols. Defaults to off.
36445 Changes in version 0.1.1.15-rc - 2006-03-11
36446 o Bugfixes and cleanups:
36447 - When we're printing strings from the network, don't try to print
36448 non-printable characters. This protects us against shell escape
36449 sequence exploits, and also against attacks to fool humans into
36450 misreading their logs.
36451 - Fix a bug where Tor would fail to establish any connections if you
36452 left it off for 24 hours and then started it: we were happy with
36453 the obsolete network statuses, but they all referred to router
36454 descriptors that were too old to fetch, so we ended up with no
36455 valid router descriptors.
36456 - Fix a seg fault in the controller's "getinfo orconn-status"
36457 command while listing status on incoming handshaking connections.
36458 Introduce a status name "NEW" for these connections.
36459 - If we get a linelist or linelist_s config option from the torrc
36460 (e.g. ExitPolicy) and it has no value, warn and skip rather than
36461 silently resetting it to its default.
36462 - Don't abandon entry guards until they've been down or gone for
36464 - Cleaner and quieter log messages.
36467 - New controller signal NEWNYM that makes new application requests
36468 use clean circuits.
36469 - Add a new circuit purpose 'controller' to let the controller ask
36470 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
36471 controller command to let you specify the purpose if you're
36472 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
36473 command to let you change a circuit's purpose after it's been
36475 - Accept "private:*" in routerdesc exit policies; not generated yet
36476 because older Tors do not understand it.
36477 - Add BSD-style contributed startup script "rc.subr" from Peter
36481 Changes in version 0.1.1.14-alpha - 2006-02-20
36482 o Bugfixes on 0.1.1.x:
36483 - Don't die if we ask for a stdout or stderr log (even implicitly)
36484 and we're set to RunAsDaemon -- just warn.
36485 - We still had a few bugs in the OR connection rotation code that
36486 caused directory servers to slowly aggregate connections to other
36487 fast Tor servers. This time for sure!
36488 - Make log entries on Win32 include the name of the function again.
36489 - We were treating a pair of exit policies if they were equal even
36490 if one said accept and the other said reject -- causing us to
36491 not always publish a new descriptor since we thought nothing
36493 - Retry pending server downloads as well as pending networkstatus
36494 downloads when we unexpectedly get a socks request.
36495 - We were ignoring the IS_FAST flag in the directory status,
36496 meaning we were willing to pick trivial-bandwidth nodes for "fast"
36498 - If the controller's SAVECONF command fails (e.g. due to file
36499 permissions), let the controller know that it failed.
36502 - If we're trying to be a Tor server and running Windows 95/98/ME
36503 as a server, explain that we'll likely crash.
36504 - When we're a server, a client asks for an old-style directory,
36505 and our write bucket is empty, don't give it to him. This way
36506 small servers can continue to serve the directory *sometimes*,
36507 without getting overloaded.
36508 - Compress exit policies even more -- look for duplicate lines
36510 - Clients now honor the "guard" flag in the router status when
36511 picking entry guards, rather than looking at is_fast or is_stable.
36512 - Retain unrecognized lines in $DATADIR/state file, so that we can
36513 be forward-compatible.
36514 - Generate 18.0.0.0/8 address policy format in descs when we can;
36515 warn when the mask is not reducible to a bit-prefix.
36516 - Let the user set ControlListenAddress in the torrc. This can be
36517 dangerous, but there are some cases (like a secured LAN) where it
36519 - Split ReachableAddresses into ReachableDirAddresses and
36520 ReachableORAddresses, so we can restrict Dir conns to port 80
36521 and OR conns to port 443.
36522 - Now we can target arch and OS in rpm builds (contributed by
36523 Phobos). Also make the resulting dist-rpm filename match the
36525 - New config options to help controllers: FetchServerDescriptors
36526 and FetchHidServDescriptors for whether to fetch server
36527 info and hidserv info or let the controller do it, and
36528 PublishServerDescriptor and PublishHidServDescriptors.
36529 - Also let the controller set the __AllDirActionsPrivate config
36530 option if you want all directory fetches/publishes to happen via
36531 Tor (it assumes your controller bootstraps your circuits).
36534 Changes in version 0.1.0.17 - 2006-02-17
36535 o Crash bugfixes on 0.1.0.x:
36536 - When servers with a non-zero DirPort came out of hibernation,
36537 sometimes they would trigger an assert.
36539 o Other important bugfixes:
36540 - On platforms that don't have getrlimit (like Windows), we were
36541 artificially constraining ourselves to a max of 1024
36542 connections. Now just assume that we can handle as many as 15000
36543 connections. Hopefully this won't cause other problems.
36545 o Backported features:
36546 - When we're a server, a client asks for an old-style directory,
36547 and our write bucket is empty, don't give it to him. This way
36548 small servers can continue to serve the directory *sometimes*,
36549 without getting overloaded.
36550 - Whenever you get a 503 in response to a directory fetch, try
36551 once more. This will become important once servers start sending
36552 503's whenever they feel busy.
36553 - Fetch a new directory every 120 minutes, not every 40 minutes.
36554 Now that we have hundreds of thousands of users running the old
36555 directory algorithm, it's starting to hurt a lot.
36556 - Bump up the period for forcing a hidden service descriptor upload
36557 from 20 minutes to 1 hour.
36560 Changes in version 0.1.1.13-alpha - 2006-02-09
36561 o Crashes in 0.1.1.x:
36562 - When you tried to setconf ORPort via the controller, Tor would
36563 crash. So people using TorCP to become a server were sad.
36564 - Solve (I hope) the stack-smashing bug that we were seeing on fast
36565 servers. The problem appears to be something do with OpenSSL's
36566 random number generation, or how we call it, or something. Let me
36567 know if the crashes continue.
36568 - Turn crypto hardware acceleration off by default, until we find
36569 somebody smart who can test it for us. (It appears to produce
36570 seg faults in at least some cases.)
36571 - Fix a rare assert error when we've tried all intro points for
36572 a hidden service and we try fetching the service descriptor again:
36573 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
36576 - Fix a major load balance bug: we were round-robining in 16 KB
36577 chunks, and servers with bandwidthrate of 20 KB, while downloading
36578 a 600 KB directory, would starve their other connections. Now we
36579 try to be a bit more fair.
36580 - Dir authorities and mirrors were never expiring the newest
36581 descriptor for each server, causing memory and directory bloat.
36582 - Fix memory-bloating and connection-bloating bug on servers: We
36583 were never closing any connection that had ever had a circuit on
36584 it, because we were checking conn->n_circuits == 0, yet we had a
36585 bug that let it go negative.
36586 - Make Tor work using squid as your http proxy again -- squid
36587 returns an error if you ask for a URL that's too long, and it uses
36588 a really generic error message. Plus, many people are behind a
36589 transparent squid so they don't even realize it.
36590 - On platforms that don't have getrlimit (like Windows), we were
36591 artificially constraining ourselves to a max of 1024
36592 connections. Now just assume that we can handle as many as 15000
36593 connections. Hopefully this won't cause other problems.
36594 - Add a new config option ExitPolicyRejectPrivate which defaults to
36595 1. This means all exit policies will begin with rejecting private
36596 addresses, unless the server operator explicitly turns it off.
36599 - Clients no longer download descriptors for non-running
36601 - Before we add new directory authorities, we should make it
36602 clear that only v1 authorities should receive/publish hidden
36603 service descriptors.
36606 - As soon as we've fetched some more directory info, immediately
36607 try to download more server descriptors. This way we don't have
36608 a 10 second pause during initial bootstrapping.
36609 - Remove even more loud log messages that the server operator can't
36611 - When we're running an obsolete or un-recommended version, make
36612 the log message more clear about what the problem is and what
36613 versions *are* still recommended.
36614 - Provide a more useful warn message when our onion queue gets full:
36615 the CPU is too slow or the exit policy is too liberal.
36616 - Don't warn when we receive a 503 from a dirserver/cache -- this
36617 will pave the way for them being able to refuse if they're busy.
36618 - When we fail to bind a listener, try to provide a more useful
36619 log message: e.g., "Is Tor already running?"
36620 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
36621 Goldberg can prove things about our handshake protocol more
36623 - MaxConn has been obsolete for a while now. Document the ConnLimit
36624 config option, which is a *minimum* number of file descriptors
36625 that must be available else Tor refuses to start.
36626 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
36627 if you log to syslog and want something other than LOG_DAEMON.
36628 - Make dirservers generate a separate "guard" flag to mean,
36629 "would make a good entry guard". Make clients parse it and vote
36630 on it. Not used by clients yet.
36631 - Implement --with-libevent-dir option to ./configure. Also, improve
36632 search techniques to find libevent, and use those for openssl too.
36633 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
36634 - Only start testing reachability once we've established a
36635 circuit. This will make startup on dirservers less noisy.
36636 - Don't try to upload hidden service descriptors until we have
36637 established a circuit.
36638 - Fix the controller's "attachstream 0" command to treat conn like
36639 it just connected, doing address remapping, handling .exit and
36640 .onion idioms, and so on. Now we're more uniform in making sure
36641 that the controller hears about new and closing connections.
36644 Changes in version 0.1.1.12-alpha - 2006-01-11
36645 o Bugfixes on 0.1.1.x:
36646 - The fix to close duplicate server connections was closing all
36647 Tor client connections if they didn't establish a circuit
36648 quickly enough. Oops.
36649 - Fix minor memory issue (double-free) that happened on exit.
36651 o Bugfixes on 0.1.0.x:
36652 - Tor didn't warn when it failed to open a log file.
36655 Changes in version 0.1.1.11-alpha - 2006-01-10
36656 o Crashes in 0.1.1.x:
36657 - Include all the assert/crash fixes from 0.1.0.16.
36658 - If you start Tor and then quit very quickly, there were some
36659 races that tried to free things that weren't allocated yet.
36660 - Fix a rare memory stomp if you're running hidden services.
36661 - Fix segfault when specifying DirServer in config without nickname.
36662 - Fix a seg fault when you finish connecting to a server but at
36663 that moment you dump his server descriptor.
36664 - Extendcircuit and Attachstream controller commands would
36665 assert/crash if you don't give them enough arguments.
36666 - Fix an assert error when we're out of space in the connection_list
36667 and we try to post a hidden service descriptor (reported by weasel).
36668 - If you specify a relative torrc path and you set RunAsDaemon in
36669 your torrc, then it chdir()'s to the new directory. If you HUP,
36670 it tries to load the new torrc location, fails, and exits.
36671 The fix: no longer allow a relative path to torrc using -f.
36674 - Implement "entry guards": automatically choose a handful of entry
36675 nodes and stick with them for all circuits. Only pick new guards
36676 when the ones you have are unsuitable, and if the old guards
36677 become suitable again, switch back. This will increase security
36678 dramatically against certain end-point attacks. The EntryNodes
36679 config option now provides some hints about which entry guards you
36680 want to use most; and StrictEntryNodes means to only use those.
36681 - New directory logic: download by descriptor digest, not by
36682 fingerprint. Caches try to download all listed digests from
36683 authorities; clients try to download "best" digests from caches.
36684 This avoids partitioning and isolating attacks better.
36685 - Make the "stable" router flag in network-status be the median of
36686 the uptimes of running valid servers, and make clients pay
36687 attention to the network-status flags. Thus the cutoff adapts
36688 to the stability of the network as a whole, making IRC, IM, etc
36689 connections more reliable.
36692 - Tor servers with dynamic IP addresses were needing to wait 18
36693 hours before they could start doing reachability testing using
36694 the new IP address and ports. This is because they were using
36695 the internal descriptor to learn what to test, yet they were only
36696 rebuilding the descriptor once they decided they were reachable.
36697 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
36698 to download certain server descriptors, throw them away, and then
36699 fetch them again after 30 minutes. Now mirrors throw away these
36700 server descriptors so clients can't get them.
36701 - We were leaving duplicate connections to other ORs open for a week,
36702 rather than closing them once we detect a duplicate. This only
36703 really affected authdirservers, but it affected them a lot.
36704 - Spread the authdirservers' reachability testing over the entire
36705 testing interval, so we don't try to do 500 TLS's at once every
36709 - If the network is down, and we try to connect to a conn because
36710 we have a circuit in mind, and we timeout (30 seconds) because the
36711 network never answers, we were expiring the circuit, but we weren't
36712 obsoleting the connection or telling the entry_guards functions.
36713 - Some Tor servers process billions of cells per day. These statistics
36714 need to be uint64_t's.
36715 - Check for integer overflows in more places, when adding elements
36716 to smartlists. This could possibly prevent a buffer overflow
36717 on malicious huge inputs. I don't see any, but I haven't looked
36719 - ReachableAddresses kept growing new "reject *:*" lines on every
36721 - When you "setconf log" via the controller, it should remove all
36722 logs. We were automatically adding back in a "log notice stdout".
36723 - Newly bootstrapped Tor networks couldn't establish hidden service
36724 circuits until they had nodes with high uptime. Be more tolerant.
36725 - We were marking servers down when they could not answer every piece
36726 of the directory request we sent them. This was far too harsh.
36727 - Fix the torify (tsocks) config file to not use Tor for localhost
36729 - Directory authorities now go to the proper authority when asking for
36730 a networkstatus, even when they want a compressed one.
36731 - Fix a harmless bug that was causing Tor servers to log
36732 "Got an end because of misc error, but we're not an AP. Closing."
36733 - Authorities were treating their own descriptor changes as cosmetic,
36734 meaning the descriptor available in the network-status and the
36735 descriptor that clients downloaded were different.
36736 - The OS X installer was adding a symlink for tor_resolve but
36737 the binary was called tor-resolve (reported by Thomas Hardly).
36738 - Workaround a problem with some http proxies where they refuse GET
36739 requests that specify "Content-Length: 0" (reported by Adrian).
36740 - Fix wrong log message when you add a "HiddenServiceNodes" config
36741 line without any HiddenServiceDir line (reported by Chris Thomas).
36744 - Write the TorVersion into the state file so we have a prayer of
36745 keeping forward and backward compatibility.
36746 - Revive the FascistFirewall config option rather than eliminating it:
36747 now it's a synonym for ReachableAddresses *:80,*:443.
36748 - Clients choose directory servers from the network status lists,
36749 not from their internal list of router descriptors. Now they can
36750 go to caches directly rather than needing to go to authorities
36752 - Directory authorities ignore router descriptors that have only
36753 cosmetic differences: do this for 0.1.0.x servers now too.
36754 - Add a new flag to network-status indicating whether the server
36755 can answer v2 directory requests too.
36756 - Authdirs now stop whining so loudly about bad descriptors that
36757 they fetch from other dirservers. So when there's a log complaint,
36758 it's for sure from a freshly uploaded descriptor.
36759 - Reduce memory requirements in our structs by changing the order
36761 - There used to be two ways to specify your listening ports in a
36762 server descriptor: on the "router" line and with a separate "ports"
36763 line. Remove support for the "ports" line.
36764 - New config option "AuthDirRejectUnlisted" for auth dirservers as
36765 a panic button: if we get flooded with unusable servers we can
36766 revert to only listing servers in the approved-routers file.
36767 - Auth dir servers can now mark a fingerprint as "!reject" or
36768 "!invalid" in the approved-routers file (as its nickname), to
36769 refuse descriptors outright or include them but marked as invalid.
36770 - Servers store bandwidth history across restarts/crashes.
36771 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
36772 get a better idea of why their circuits failed. Not used yet.
36773 - Directory mirrors now cache up to 16 unrecognized network-status
36774 docs. Now we can add new authdirservers and they'll be cached too.
36775 - When picking a random directory, prefer non-authorities if any
36777 - New controller option "getinfo desc/all-recent" to fetch the
36778 latest server descriptor for every router that Tor knows about.
36781 Changes in version 0.1.0.16 - 2006-01-02
36782 o Crash bugfixes on 0.1.0.x:
36783 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
36784 corrupting the heap, losing FDs, or crashing when we need to resize
36785 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
36786 - It turns out sparc64 platforms crash on unaligned memory access
36787 too -- so detect and avoid this.
36788 - Handle truncated compressed data correctly (by detecting it and
36790 - Fix possible-but-unlikely free(NULL) in control.c.
36791 - When we were closing connections, there was a rare case that
36792 stomped on memory, triggering seg faults and asserts.
36793 - Avoid potential infinite recursion when building a descriptor. (We
36794 don't know that it ever happened, but better to fix it anyway.)
36795 - We were neglecting to unlink marked circuits from soon-to-close OR
36796 connections, which caused some rare scribbling on freed memory.
36797 - Fix a memory stomping race bug when closing the joining point of two
36798 rendezvous circuits.
36799 - Fix an assert in time parsing found by Steven Murdoch.
36801 o Other bugfixes on 0.1.0.x:
36802 - When we're doing reachability testing, provide more useful log
36803 messages so the operator knows what to expect.
36804 - Do not check whether DirPort is reachable when we are suppressing
36805 advertising it because of hibernation.
36806 - When building with -static or on Solaris, we sometimes needed -ldl.
36807 - When we're deciding whether a stream has enough circuits around
36808 that can handle it, count the freshly dirty ones and not the ones
36809 that are so dirty they won't be able to handle it.
36810 - When we're expiring old circuits, we had a logic error that caused
36811 us to close new rendezvous circuits rather than old ones.
36812 - Give a more helpful log message when you try to change ORPort via
36813 the controller: you should upgrade Tor if you want that to work.
36814 - We were failing to parse Tor versions that start with "Tor ".
36815 - Tolerate faulty streams better: when a stream fails for reason
36816 exitpolicy, stop assuming that the router is lying about his exit
36817 policy. When a stream fails for reason misc, allow it to retry just
36818 as if it was resolvefailed. When a stream has failed three times,
36819 reset its failure count so we can try again and get all three tries.
36822 Changes in version 0.1.1.10-alpha - 2005-12-11
36823 o Correctness bugfixes on 0.1.0.x:
36824 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
36825 corrupting the heap, losing FDs, or crashing when we need to resize
36826 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
36827 - Stop doing the complex voodoo overkill checking for insecure
36828 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
36829 - When we were closing connections, there was a rare case that
36830 stomped on memory, triggering seg faults and asserts.
36831 - We were neglecting to unlink marked circuits from soon-to-close OR
36832 connections, which caused some rare scribbling on freed memory.
36833 - When we're deciding whether a stream has enough circuits around
36834 that can handle it, count the freshly dirty ones and not the ones
36835 that are so dirty they won't be able to handle it.
36836 - Recover better from TCP connections to Tor servers that are
36837 broken but don't tell you (it happens!); and rotate TLS
36838 connections once a week.
36839 - When we're expiring old circuits, we had a logic error that caused
36840 us to close new rendezvous circuits rather than old ones.
36841 - Fix a scary-looking but apparently harmless bug where circuits
36842 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
36843 servers, and never switch to state CIRCUIT_STATE_OPEN.
36844 - When building with -static or on Solaris, we sometimes needed to
36846 - Give a useful message when people run Tor as the wrong user,
36847 rather than telling them to start chowning random directories.
36848 - We were failing to inform the controller about new .onion streams.
36850 o Security bugfixes on 0.1.0.x:
36851 - Refuse server descriptors if the fingerprint line doesn't match
36852 the included identity key. Tor doesn't care, but other apps (and
36853 humans) might actually be trusting the fingerprint line.
36854 - We used to kill the circuit when we receive a relay command we
36855 don't recognize. Now we just drop it.
36856 - Start obeying our firewall options more rigorously:
36857 . If we can't get to a dirserver directly, try going via Tor.
36858 . Don't ever try to connect (as a client) to a place our
36859 firewall options forbid.
36860 . If we specify a proxy and also firewall options, obey the
36861 firewall options even when we're using the proxy: some proxies
36862 can only proxy to certain destinations.
36863 - Fix a bug found by Lasse Overlier: when we were making internal
36864 circuits (intended to be cannibalized later for rendezvous and
36865 introduction circuits), we were picking them so that they had
36866 useful exit nodes. There was no need for this, and it actually
36867 aids some statistical attacks.
36868 - Start treating internal circuits and exit circuits separately.
36869 It's important to keep them separate because internal circuits
36870 have their last hops picked like middle hops, rather than like
36871 exit hops. So exiting on them will break the user's expectations.
36873 o Bugfixes on 0.1.1.x:
36874 - Take out the mis-feature where we tried to detect IP address
36875 flapping for people with DynDNS, and chose not to upload a new
36876 server descriptor sometimes.
36877 - Try to be compatible with OpenSSL 0.9.6 again.
36878 - Log fix: when the controller is logging about .onion addresses,
36879 sometimes it didn't include the ".onion" part of the address.
36880 - Don't try to modify options->DirServers internally -- if the
36881 user didn't specify any, just add the default ones directly to
36882 the trusted dirserver list. This fixes a bug where people running
36883 controllers would use SETCONF on some totally unrelated config
36884 option, and Tor would start yelling at them about changing their
36886 - Let the controller's redirectstream command specify a port, in
36887 case the controller wants to change that too.
36888 - When we requested a pile of server descriptors, we sometimes
36889 accidentally launched a duplicate request for the first one.
36890 - Bugfix for trackhostexits: write down the fingerprint of the
36891 chosen exit, not its nickname, because the chosen exit might not
36893 - When parsing foo.exit, if foo is unknown, and we are leaving
36894 circuits unattached, set the chosen_exit field and leave the
36895 address empty. This matters because controllers got confused
36897 - Directory authorities no longer try to download server
36898 descriptors that they know they will reject.
36900 o Features and updates:
36901 - Replace balanced trees with hash tables: this should make stuff
36902 significantly faster.
36903 - Resume using the AES counter-mode implementation that we ship,
36904 rather than OpenSSL's. Ours is significantly faster.
36905 - Many other CPU and memory improvements.
36906 - Add a new config option FastFirstHopPK (on by default) so clients
36907 do a trivial crypto handshake for their first hop, since TLS has
36908 already taken care of confidentiality and authentication.
36909 - Add a new config option TestSocks so people can see if their
36910 applications are using socks4, socks4a, socks5-with-ip, or
36911 socks5-with-hostname. This way they don't have to keep mucking
36912 with tcpdump and wondering if something got cached somewhere.
36913 - Warn when listening on a public address for socks. I suspect a
36914 lot of people are setting themselves up as open socks proxies,
36915 and they have no idea that jerks on the Internet are using them,
36916 since they simply proxy the traffic into the Tor network.
36917 - Add "private:*" as an alias in configuration for policies. Now
36918 you can simplify your exit policy rather than needing to list
36919 every single internal or nonroutable network space.
36920 - Add a new controller event type that allows controllers to get
36921 all server descriptors that were uploaded to a router in its role
36922 as authoritative dirserver.
36923 - Start shipping socks-extensions.txt, tor-doc-unix.html,
36924 tor-doc-server.html, and stylesheet.css in the tarball.
36925 - Stop shipping tor-doc.html in the tarball.
36928 Changes in version 0.1.1.9-alpha - 2005-11-15
36929 o Usability improvements:
36930 - Start calling it FooListenAddress rather than FooBindAddress,
36931 since few of our users know what it means to bind an address
36933 - Reduce clutter in server logs. We're going to try to make
36934 them actually usable now. New config option ProtocolWarnings that
36935 lets you hear about how _other Tors_ are breaking the protocol. Off
36937 - Divide log messages into logging domains. Once we put some sort
36938 of interface on this, it will let people looking at more verbose
36939 log levels specify the topics they want to hear more about.
36940 - Make directory servers return better http 404 error messages
36941 instead of a generic "Servers unavailable".
36942 - Check for even more Windows version flags when writing the platform
36943 string in server descriptors, and note any we don't recognize.
36944 - Clean up more of the OpenSSL memory when exiting, so we can detect
36945 memory leaks better.
36946 - Make directory authorities be non-versioning, non-naming by
36947 default. Now we can add new directory servers without requiring
36948 their operators to pay close attention.
36949 - When logging via syslog, include the pid whenever we provide
36950 a log entry. Suggested by Todd Fries.
36952 o Performance improvements:
36953 - Directory servers now silently throw away new descriptors that
36954 haven't changed much if the timestamps are similar. We do this to
36955 tolerate older Tor servers that upload a new descriptor every 15
36956 minutes. (It seemed like a good idea at the time.)
36957 - Inline bottleneck smartlist functions; use fast versions by default.
36958 - Add a "Map from digest to void*" abstraction digestmap_t so we
36959 can do less hex encoding/decoding. Use it in router_get_by_digest()
36960 to resolve a performance bottleneck.
36961 - Allow tor_gzip_uncompress to extract as much as possible from
36962 truncated compressed data. Try to extract as many
36963 descriptors as possible from truncated http responses (when
36964 DIR_PURPOSE_FETCH_ROUTERDESC).
36965 - Make circ->onionskin a pointer, not a static array. moria2 was using
36966 125000 circuit_t's after it had been up for a few weeks, which
36967 translates to 20+ megs of wasted space.
36968 - The private half of our EDH handshake keys are now chosen out
36969 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
36971 o Security improvements:
36972 - Start making directory caches retain old routerinfos, so soon
36973 clients can start asking by digest of descriptor rather than by
36974 fingerprint of server.
36975 - Add half our entropy from RAND_poll in OpenSSL. This knows how
36976 to use egd (if present), openbsd weirdness (if present), vms/os2
36977 weirdness (if we ever port there), and more in the future.
36979 o Bugfixes on 0.1.0.x:
36980 - Do round-robin writes of at most 16 kB per write. This might be
36981 more fair on loaded Tor servers, and it might resolve our Windows
36982 crash bug. It might also slow things down.
36983 - Our TLS handshakes were generating a single public/private
36984 keypair for the TLS context, rather than making a new one for
36985 each new connections. Oops. (But we were still rotating them
36986 periodically, so it's not so bad.)
36987 - When we were cannibalizing a circuit with a particular exit
36988 node in mind, we weren't checking to see if that exit node was
36989 already present earlier in the circuit. Oops.
36990 - When a Tor server's IP changes (e.g. from a dyndns address),
36991 upload a new descriptor so clients will learn too.
36992 - Really busy servers were keeping enough circuits open on stable
36993 connections that they were wrapping around the circuit_id
36994 space. (It's only two bytes.) This exposed a bug where we would
36995 feel free to reuse a circuit_id even if it still exists but has
36996 been marked for close. Try to fix this bug. Some bug remains.
36997 - If we would close a stream early (e.g. it asks for a .exit that
36998 we know would refuse it) but the LeaveStreamsUnattached config
36999 option is set by the controller, then don't close it.
37001 o Bugfixes on 0.1.1.8-alpha:
37002 - Fix a big pile of memory leaks, some of them serious.
37003 - Do not try to download a routerdesc if we would immediately reject
37005 - Resume inserting a newline between all router descriptors when
37006 generating (old style) signed directories, since our spec says
37008 - When providing content-type application/octet-stream for
37009 server descriptors using .z, we were leaving out the
37010 content-encoding header. Oops. (Everything tolerated this just
37011 fine, but that doesn't mean we need to be part of the problem.)
37012 - Fix a potential seg fault in getconf and getinfo using version 1
37013 of the controller protocol.
37014 - Avoid crash: do not check whether DirPort is reachable when we
37015 are suppressing it because of hibernation.
37016 - Make --hash-password not crash on exit.
37019 Changes in version 0.1.1.8-alpha - 2005-10-07
37020 o New features (major):
37021 - Clients don't download or use the directory anymore. Now they
37022 download and use network-statuses from the trusted dirservers,
37023 and fetch individual server descriptors as needed from mirrors.
37024 See dir-spec.txt for all the gory details.
37025 - Be more conservative about whether to advertise our DirPort.
37026 The main change is to not advertise if we're running at capacity
37027 and either a) we could hibernate or b) our capacity is low and
37028 we're using a default DirPort.
37029 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
37031 o New features (minor):
37032 - Try to be smart about when to retry network-status and
37033 server-descriptor fetches. Still needs some tuning.
37034 - Stop parsing, storing, or using running-routers output (but
37035 mirrors still cache and serve it).
37036 - Consider a threshold of versioning dirservers (dirservers who have
37037 an opinion about which Tor versions are still recommended) before
37038 deciding whether to warn the user that he's obsolete.
37039 - Dirservers can now reject/invalidate by key and IP, with the
37040 config options "AuthDirInvalid" and "AuthDirReject". This is
37041 useful since currently we automatically list servers as running
37042 and usable even if we know they're jerks.
37043 - Provide dire warnings to any users who set DirServer; move it out
37044 of torrc.sample and into torrc.complete.
37045 - Add MyFamily to torrc.sample in the server section.
37046 - Add nicknames to the DirServer line, so we can refer to them
37047 without requiring all our users to memorize their IP addresses.
37048 - When we get an EOF or a timeout on a directory connection, note
37049 how many bytes of serverdesc we are dropping. This will help
37050 us determine whether it is smart to parse incomplete serverdesc
37052 - Add a new function to "change pseudonyms" -- that is, to stop
37053 using any currently-dirty circuits for new streams, so we don't
37054 link new actions to old actions. Currently it's only called on
37055 HUP (or SIGNAL RELOAD).
37056 - On sighup, if UseHelperNodes changed to 1, use new circuits.
37057 - Start using RAND_bytes rather than RAND_pseudo_bytes from
37058 OpenSSL. Also, reseed our entropy every hour, not just at
37059 startup. And entropy in 512-bit chunks, not 160-bit chunks.
37061 o Fixes on 0.1.1.7-alpha:
37062 - Nobody ever implemented EVENT_ADDRMAP for control protocol
37063 version 0, so don't let version 0 controllers ask for it.
37064 - If you requested something with too many newlines via the
37065 v1 controller protocol, you could crash tor.
37066 - Fix a number of memory leaks, including some pretty serious ones.
37067 - Re-enable DirPort testing again, so Tor servers will be willing
37068 to advertise their DirPort if it's reachable.
37069 - On TLS handshake, only check the other router's nickname against
37070 its expected nickname if is_named is set.
37072 o Fixes forward-ported from 0.1.0.15:
37073 - Don't crash when we don't have any spare file descriptors and we
37074 try to spawn a dns or cpu worker.
37075 - Make the numbers in read-history and write-history into uint64s,
37076 so they don't overflow and publish negatives in the descriptor.
37078 o Fixes on 0.1.0.x:
37079 - For the OS X package's modified privoxy config file, comment
37080 out the "logfile" line so we don't log everything passed
37082 - We were whining about using socks4 or socks5-with-local-lookup
37083 even when it's an IP in the "virtual" range we designed exactly
37085 - We were leaking some memory every time the client changes IPs.
37086 - Never call free() on tor_malloc()d memory. This will help us
37087 use dmalloc to detect memory leaks.
37088 - Check for named servers when looking them up by nickname;
37089 warn when we'recalling a non-named server by its nickname;
37090 don't warn twice about the same name.
37091 - Try to list MyFamily elements by key, not by nickname, and warn
37092 if we've not heard of the server.
37093 - Make windows platform detection (uname equivalent) smarter.
37094 - It turns out sparc64 doesn't like unaligned access either.
37097 Changes in version 0.1.0.15 - 2005-09-23
37098 o Bugfixes on 0.1.0.x:
37099 - Reject ports 465 and 587 (spam targets) in default exit policy.
37100 - Don't crash when we don't have any spare file descriptors and we
37101 try to spawn a dns or cpu worker.
37102 - Get rid of IgnoreVersion undocumented config option, and make us
37103 only warn, never exit, when we're running an obsolete version.
37104 - Don't try to print a null string when your server finds itself to
37105 be unreachable and the Address config option is empty.
37106 - Make the numbers in read-history and write-history into uint64s,
37107 so they don't overflow and publish negatives in the descriptor.
37108 - Fix a minor memory leak in smartlist_string_remove().
37109 - We were only allowing ourselves to upload a server descriptor at
37110 most every 20 minutes, even if it changed earlier than that.
37111 - Clean up log entries that pointed to old URLs.
37114 Changes in version 0.1.1.7-alpha - 2005-09-14
37115 o Fixes on 0.1.1.6-alpha:
37116 - Exit servers were crashing when people asked them to make a
37117 connection to an address not in their exit policy.
37118 - Looking up a non-existent stream for a v1 control connection would
37120 - Fix a seg fault if we ask a dirserver for a descriptor by
37121 fingerprint but he doesn't know about him.
37122 - SETCONF was appending items to linelists, not clearing them.
37123 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
37124 out and refuse the setconf if it would fail.
37125 - Downgrade the dirserver log messages when whining about
37129 - Add Peter Palfrader's check-tor script to tor/contrib/
37130 It lets you easily check whether a given server (referenced by
37131 nickname) is reachable by you.
37132 - Numerous changes to move towards client-side v2 directories. Not
37135 o Fixes on 0.1.0.x:
37136 - If the user gave tor an odd number of command-line arguments,
37137 we were silently ignoring the last one. Now we complain and fail.
37138 [This wins the oldest-bug prize -- this bug has been present since
37139 November 2002, as released in Tor 0.0.0.]
37140 - Do not use unaligned memory access on alpha, mips, or mipsel.
37141 It *works*, but is very slow, so we treat them as if it doesn't.
37142 - Retry directory requests if we fail to get an answer we like
37143 from a given dirserver (we were retrying before, but only if
37144 we fail to connect).
37145 - When writing the RecommendedVersions line, sort them first.
37146 - When the client asked for a rendezvous port that the hidden
37147 service didn't want to provide, we were sending an IP address
37148 back along with the end cell. Fortunately, it was zero. But stop
37150 - Correct "your server is reachable" log entries to indicate that
37151 it was self-testing that told us so.
37154 Changes in version 0.1.1.6-alpha - 2005-09-09
37155 o Fixes on 0.1.1.5-alpha:
37156 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
37157 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
37158 - Fix bug with tor_memmem finding a match at the end of the string.
37159 - Make unit tests run without segfaulting.
37160 - Resolve some solaris x86 compile warnings.
37161 - Handle duplicate lines in approved-routers files without warning.
37162 - Fix bug where as soon as a server refused any requests due to his
37163 exit policy (e.g. when we ask for localhost and he tells us that's
37164 127.0.0.1 and he won't do it), we decided he wasn't obeying his
37165 exit policy using him for any exits.
37166 - Only do openssl hardware accelerator stuff if openssl version is
37169 o New controller features/fixes:
37170 - Add a "RESETCONF" command so you can set config options like
37171 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
37172 a config option in the torrc with no value, then it clears it
37173 entirely (rather than setting it to its default).
37174 - Add a "GETINFO config-file" to tell us where torrc is.
37175 - Avoid sending blank lines when GETINFO replies should be empty.
37176 - Add a QUIT command for the controller (for using it manually).
37177 - Fix a bug in SAVECONF that was adding default dirservers and
37178 other redundant entries to the torrc file.
37180 o Start on the new directory design:
37181 - Generate, publish, cache, serve new network-status format.
37182 - Publish individual descriptors (by fingerprint, by "all", and by
37184 - Publish client and server recommended versions separately.
37185 - Allow tor_gzip_uncompress() to handle multiple concatenated
37186 compressed strings. Serve compressed groups of router
37187 descriptors. The compression logic here could be more
37189 - Distinguish v1 authorities (all currently trusted directories)
37190 from v2 authorities (all trusted directories).
37191 - Change DirServers config line to note which dirs are v1 authorities.
37192 - Add configuration option "V1AuthoritativeDirectory 1" which
37193 moria1, moria2, and tor26 should set.
37194 - Remove option when getting directory cache to see whether they
37195 support running-routers; they all do now. Replace it with one
37196 to see whether caches support v2 stuff.
37199 - Dirservers now do their own external reachability testing of each
37200 Tor server, and only list them as running if they've been found to
37201 be reachable. We also send back warnings to the server's logs if
37202 it uploads a descriptor that we already believe is unreachable.
37203 - Implement exit enclaves: if we know an IP address for the
37204 destination, and there's a running Tor server at that address
37205 which allows exit to the destination, then extend the circuit to
37206 that exit first. This provides end-to-end encryption and end-to-end
37207 authentication. Also, if the user wants a .exit address or enclave,
37208 use 4 hops rather than 3, and cannibalize a general circ for it
37210 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
37211 controller. Also, rotate dns and cpu workers if the controller
37212 changes options that will affect them; and initialize the dns
37213 worker cache tree whether or not we start out as a server.
37214 - Only upload a new server descriptor when options change, 18
37215 hours have passed, uptime is reset, or bandwidth changes a lot.
37216 - Check [X-]Forwarded-For headers in HTTP requests when generating
37217 log messages. This lets people run dirservers (and caches) behind
37218 Apache but still know which IP addresses are causing warnings.
37220 o Config option changes:
37221 - Replace (Fascist)Firewall* config options with a new
37222 ReachableAddresses option that understands address policies.
37223 For example, "ReachableAddresses *:80,*:443"
37224 - Get rid of IgnoreVersion undocumented config option, and make us
37225 only warn, never exit, when we're running an obsolete version.
37226 - Make MonthlyAccountingStart config option truly obsolete now.
37228 o Fixes on 0.1.0.x:
37229 - Reject ports 465 and 587 in the default exit policy, since
37230 people have started using them for spam too.
37231 - It turns out we couldn't bootstrap a network since we added
37232 reachability detection in 0.1.0.1-rc. Good thing the Tor network
37233 has never gone down. Add an AssumeReachable config option to let
37234 servers and dirservers bootstrap. When we're trying to build a
37235 high-uptime or high-bandwidth circuit but there aren't enough
37236 suitable servers, try being less picky rather than simply failing.
37237 - Our logic to decide if the OR we connected to was the right guy
37238 was brittle and maybe open to a mitm for unverified routers.
37239 - We weren't cannibalizing circuits correctly for
37240 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
37241 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
37242 build those from scratch. This should make hidden services faster.
37243 - Predict required circuits better, with an eye toward making hidden
37244 services faster on the service end.
37245 - Retry streams if the exit node sends back a 'misc' failure. This
37246 should result in fewer random failures. Also, after failing
37247 from resolve failed or misc, reset the num failures, so we give
37248 it a fair shake next time we try.
37249 - Clean up the rendezvous warn log msgs, and downgrade some to info.
37250 - Reduce severity on logs about dns worker spawning and culling.
37251 - When we're shutting down and we do something like try to post a
37252 server descriptor or rendezvous descriptor, don't complain that
37253 we seem to be unreachable. Of course we are, we're shutting down.
37254 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
37255 We don't use them yet, but maybe one day our DNS resolver will be
37256 able to discover them.
37257 - Make ContactInfo mandatory for authoritative directory servers.
37258 - Require server descriptors to list IPv4 addresses -- hostnames
37259 are no longer allowed. This also fixes some potential security
37260 problems with people providing hostnames as their address and then
37261 preferentially resolving them to partition users.
37262 - Change log line for unreachability to explicitly suggest /etc/hosts
37263 as the culprit. Also make it clearer what IP address and ports we're
37264 testing for reachability.
37265 - Put quotes around user-supplied strings when logging so users are
37266 more likely to realize if they add bad characters (like quotes)
37268 - Let auth dir servers start without specifying an Address config
37270 - Make unit tests (and other invocations that aren't the real Tor)
37271 run without launching listeners, creating subdirectories, and so on.
37274 Changes in version 0.1.1.5-alpha - 2005-08-08
37275 o Bugfixes included in 0.1.0.14.
37277 o Bugfixes on 0.1.0.x:
37278 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
37279 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
37280 it would silently using ignore the 6668.
37283 Changes in version 0.1.0.14 - 2005-08-08
37284 o Bugfixes on 0.1.0.x:
37285 - Fix the other half of the bug with crypto handshakes
37287 - Fix an assert trigger if you send a 'signal term' via the
37288 controller when it's listening for 'event info' messages.
37291 Changes in version 0.1.1.4-alpha - 2005-08-04
37292 o Bugfixes included in 0.1.0.13.
37295 - Improve tor_gettimeofday() granularity on windows.
37296 - Make clients regenerate their keys when their IP address changes.
37297 - Implement some more GETINFO goodness: expose helper nodes, config
37298 options, getinfo keys.
37301 Changes in version 0.1.0.13 - 2005-08-04
37302 o Bugfixes on 0.1.0.x:
37303 - Fix a critical bug in the security of our crypto handshakes.
37304 - Fix a size_t underflow in smartlist_join_strings2() that made
37305 it do bad things when you hand it an empty smartlist.
37306 - Fix Windows installer to ship Tor license (thanks to Aphex for
37307 pointing out this oversight) and put a link to the doc directory
37309 - Explicitly set no-unaligned-access for sparc: it turns out the
37310 new gcc's let you compile broken code, but that doesn't make it
37314 Changes in version 0.1.1.3-alpha - 2005-07-23
37315 o Bugfixes on 0.1.1.2-alpha:
37316 - Fix a bug in handling the controller's "post descriptor"
37318 - Fix several bugs in handling the controller's "extend circuit"
37320 - Fix a bug in handling the controller's "stream status" event.
37321 - Fix an assert failure if we have a controller listening for
37322 circuit events and we go offline.
37323 - Re-allow hidden service descriptors to publish 0 intro points.
37324 - Fix a crash when generating your hidden service descriptor if
37325 you don't have enough intro points already.
37327 o New features on 0.1.1.2-alpha:
37328 - New controller function "getinfo accounting", to ask how
37329 many bytes we've used in this time period.
37330 - Experimental support for helper nodes: a lot of the risk from
37331 a small static adversary comes because users pick new random
37332 nodes every time they rebuild a circuit. Now users will try to
37333 stick to the same small set of entry nodes if they can. Not
37334 enabled by default yet.
37336 o Bugfixes on 0.1.0.12:
37337 - If you're an auth dir server, always publish your dirport,
37338 even if you haven't yet found yourself to be reachable.
37339 - Fix a size_t underflow in smartlist_join_strings2() that made
37340 it do bad things when you hand it an empty smartlist.
37343 Changes in version 0.1.0.12 - 2005-07-18
37344 o New directory servers:
37345 - tor26 has changed IP address.
37347 o Bugfixes on 0.1.0.x:
37348 - Fix a possible double-free in tor_gzip_uncompress().
37349 - When --disable-threads is set, do not search for or link against
37350 pthreads libraries.
37351 - Don't trigger an assert if an authoritative directory server
37352 claims its dirport is 0.
37353 - Fix bug with removing Tor as an NT service: some people were
37354 getting "The service did not return an error." Thanks to Matt
37358 Changes in version 0.1.1.2-alpha - 2005-07-15
37359 o New directory servers:
37360 - tor26 has changed IP address.
37362 o Bugfixes on 0.1.0.x, crashes/leaks:
37363 - Port the servers-not-obeying-their-exit-policies fix from
37365 - Fix an fd leak in start_daemon().
37366 - On Windows, you can't always reopen a port right after you've
37367 closed it. So change retry_listeners() to only close and re-open
37368 ports that have changed.
37369 - Fix a possible double-free in tor_gzip_uncompress().
37371 o Bugfixes on 0.1.0.x, usability:
37372 - When tor_socketpair() fails in Windows, give a reasonable
37373 Windows-style errno back.
37374 - Let people type "tor --install" as well as "tor -install" when
37376 want to make it an NT service.
37377 - NT service patch from Matt Edman to improve error messages.
37378 - When the controller asks for a config option with an abbreviated
37379 name, give the full name in our response.
37380 - Correct the man page entry on TrackHostExitsExpire.
37381 - Looks like we were never delivering deflated (i.e. compressed)
37382 running-routers lists, even when asked. Oops.
37383 - When --disable-threads is set, do not search for or link against
37384 pthreads libraries.
37386 o Bugfixes on 0.1.1.x:
37387 - Fix a seg fault with autodetecting which controller version is
37391 - New hidden service descriptor format: put a version in it, and
37392 let people specify introduction/rendezvous points that aren't
37393 in "the directory" (which is subjective anyway).
37394 - Allow the DEBUG controller event to work again. Mark certain log
37395 entries as "don't tell this to controllers", so we avoid cycles.
37398 Changes in version 0.1.0.11 - 2005-06-30
37399 o Bugfixes on 0.1.0.x:
37400 - Fix major security bug: servers were disregarding their
37401 exit policies if clients behaved unexpectedly.
37402 - Make OS X init script check for missing argument, so we don't
37403 confuse users who invoke it incorrectly.
37404 - Fix a seg fault in "tor --hash-password foo".
37405 - The MAPADDRESS control command was broken.
37408 Changes in version 0.1.1.1-alpha - 2005-06-29
37410 - Make OS X init script check for missing argument, so we don't
37411 confuse users who invoke it incorrectly.
37412 - Fix a seg fault in "tor --hash-password foo".
37413 - Fix a possible way to DoS dirservers.
37414 - When we complain that your exit policy implicitly allows local or
37415 private address spaces, name them explicitly so operators can
37417 - Make the log message less scary when all the dirservers are
37418 temporarily unreachable.
37419 - We were printing the number of idle dns workers incorrectly when
37423 - Revised controller protocol (version 1) that uses ascii rather
37424 than binary. Add supporting libraries in python and java so you
37425 can use the controller from your applications without caring how
37426 our protocol works.
37427 - Spiffy new support for crypto hardware accelerators. Can somebody
37431 Changes in version 0.0.9.10 - 2005-06-16
37432 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
37433 - Refuse relay cells that claim to have a length larger than the
37434 maximum allowed. This prevents a potential attack that could read
37435 arbitrary memory (e.g. keys) from an exit server's process
37439 Changes in version 0.1.0.10 - 2005-06-14
37440 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
37441 libevent before 1.1a.
37444 Changes in version 0.1.0.9-rc - 2005-06-09
37446 - Reset buf->highwater every time buf_shrink() is called, not just on
37447 a successful shrink. This was causing significant memory bloat.
37448 - Fix buffer overflow when checking hashed passwords.
37449 - Security fix: if seeding the RNG on Win32 fails, quit.
37450 - Allow seeding the RNG on Win32 even when you're not running as
37452 - Disable threading on Solaris too. Something is wonky with it,
37453 cpuworkers, and reentrant libs.
37454 - Reenable the part of the code that tries to flush as soon as an
37455 OR outbuf has a full TLS record available. Perhaps this will make
37456 OR outbufs not grow as huge except in rare cases, thus saving lots
37457 of CPU time plus memory.
37458 - Reject malformed .onion addresses rather then passing them on as
37459 normal web requests.
37460 - Adapt patch from Adam Langley: fix possible memory leak in
37461 tor_lookup_hostname().
37462 - Initialize libevent later in the startup process, so the logs are
37463 already established by the time we start logging libevent warns.
37464 - Use correct errno on win32 if libevent fails.
37465 - Check and warn about known-bad/slow libevent versions.
37466 - Pay more attention to the ClientOnly config option.
37467 - Have torctl.in/tor.sh.in check for location of su binary (needed
37469 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
37470 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
37471 HttpProxyAuthenticator
37472 - Stop warning about sigpipes in the logs. We're going to
37473 pretend that getting these occasionally is normal and fine.
37474 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
37476 installer screens; and don't put stuff into StartupItems unless
37477 the user asks you to.
37478 - Require servers that use the default dirservers to have public IP
37479 addresses. We have too many servers that are configured with private
37480 IPs and their admins never notice the log entries complaining that
37481 their descriptors are being rejected.
37482 - Add OSX uninstall instructions. An actual uninstall script will
37486 Changes in version 0.1.0.8-rc - 2005-05-23
37488 - It turns out that kqueue on OS X 10.3.9 was causing kernel
37489 panics. Disable kqueue on all OS X Tors.
37490 - Fix RPM: remove duplicate line accidentally added to the rpm
37492 - Disable threads on openbsd too, since its gethostaddr is not
37494 - Tolerate libevent 0.8 since it still works, even though it's
37496 - Enable building on Red Hat 9.0 again.
37497 - Allow the middle hop of the testing circuit to be running any
37498 version, now that most of them have the bugfix to let them connect
37499 to unknown servers. This will allow reachability testing to work
37500 even when 0.0.9.7-0.0.9.9 become obsolete.
37501 - Handle relay cells with rh.length too large. This prevents
37502 a potential attack that could read arbitrary memory (maybe even
37503 keys) from the exit server's process.
37504 - We screwed up the dirport reachability testing when we don't yet
37505 have a cached version of the directory. Hopefully now fixed.
37506 - Clean up router_load_single_router() (used by the controller),
37507 so it doesn't seg fault on error.
37508 - Fix a minor memory leak when somebody establishes an introduction
37509 point at your Tor server.
37510 - If a socks connection ends because read fails, don't warn that
37511 you're not sending a socks reply back.
37514 - Add HttpProxyAuthenticator config option too, that works like
37515 the HttpsProxyAuthenticator config option.
37516 - Encode hashed controller passwords in hex instead of base64,
37517 to make it easier to write controllers.
37520 Changes in version 0.1.0.7-rc - 2005-05-17
37522 - Fix a bug in the OS X package installer that prevented it from
37523 installing on Tiger.
37524 - Fix a script bug in the OS X package installer that made it
37525 complain during installation.
37526 - Find libevent even if it's hiding in /usr/local/ and your
37527 CFLAGS and LDFLAGS don't tell you to look there.
37528 - Be able to link with libevent as a shared library (the default
37529 after 1.0d), even if it's hiding in /usr/local/lib and even
37530 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
37531 assuming you're running gcc. Otherwise fail and give a useful
37533 - Fix a bug in the RPM packager: set home directory for _tor to
37534 something more reasonable when first installing.
37535 - Free a minor amount of memory that is still reachable on exit.
37538 Changes in version 0.1.0.6-rc - 2005-05-14
37540 - Implement --disable-threads configure option. Disable threads on
37541 netbsd by default, because it appears to have no reentrant resolver
37543 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
37544 release (1.1) detects and disables kqueue if it's broken.
37545 - Append default exit policy before checking for implicit internal
37546 addresses. Now we don't log a bunch of complaints on startup
37547 when using the default exit policy.
37548 - Some people were putting "Address " in their torrc, and they had
37549 a buggy resolver that resolved " " to 0.0.0.0. Oops.
37550 - If DataDir is ~/.tor, and that expands to /.tor, then default to
37551 LOCALSTATEDIR/tor instead.
37552 - Fix fragmented-message bug in TorControl.py.
37553 - Resolve a minor bug which would prevent unreachable dirports
37554 from getting suppressed in the published descriptor.
37555 - When the controller gave us a new descriptor, we weren't resolving
37556 it immediately, so Tor would think its address was 0.0.0.0 until
37557 we fetched a new directory.
37558 - Fix an uppercase/lowercase case error in suppressing a bogus
37559 libevent warning on some Linuxes.
37562 - Begin scrubbing sensitive strings from logs by default. Turn off
37563 the config option SafeLogging if you need to do debugging.
37564 - Switch to a new buffer management algorithm, which tries to avoid
37565 reallocing and copying quite as much. In first tests it looks like
37566 it uses *more* memory on average, but less cpu.
37567 - First cut at support for "create-fast" cells. Clients can use
37568 these when extending to their first hop, since the TLS already
37569 provides forward secrecy and authentication. Not enabled on
37571 - When dirservers refuse a router descriptor, we now log its
37572 contactinfo, platform, and the poster's IP address.
37573 - Call tor_free_all instead of connections_free_all after forking, to
37574 save memory on systems that need to fork.
37575 - Whine at you if you're a server and you don't set your contactinfo.
37576 - Implement --verify-config command-line option to check if your torrc
37577 is valid without actually launching Tor.
37578 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
37579 rather than just rejecting it.
37582 Changes in version 0.1.0.5-rc - 2005-04-27
37584 - Stop trying to print a null pointer if an OR conn fails because
37585 we didn't like its cert.
37587 - Switch our internal buffers implementation to use a ring buffer,
37588 to hopefully improve performance for fast servers a lot.
37589 - Add HttpsProxyAuthenticator support (basic auth only), based
37590 on patch from Adam Langley.
37591 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
37592 the fast servers that have been joining lately.
37593 - Give hidden service accesses extra time on the first attempt,
37594 since 60 seconds is often only barely enough. This might improve
37596 - Improve performance for dirservers: stop re-parsing the whole
37597 directory every time you regenerate it.
37598 - Add more debugging info to help us find the weird dns freebsd
37599 pthreads bug; cleaner debug messages to help track future issues.
37602 Changes in version 0.0.9.9 - 2005-04-23
37603 o Bugfixes on 0.0.9.x:
37604 - If unofficial Tor clients connect and send weird TLS certs, our
37605 Tor server triggers an assert. This release contains a minimal
37606 backport from the broader fix that we put into 0.1.0.4-rc.
37609 Changes in version 0.1.0.4-rc - 2005-04-23
37611 - If unofficial Tor clients connect and send weird TLS certs, our
37612 Tor server triggers an assert. Stop asserting, and start handling
37613 TLS errors better in other situations too.
37614 - When the controller asks us to tell it about all the debug-level
37615 logs, it turns out we were generating debug-level logs while
37616 telling it about them, which turns into a bad loop. Now keep
37617 track of whether you're sending a debug log to the controller,
37618 and don't log when you are.
37619 - Fix the "postdescriptor" feature of the controller interface: on
37620 non-complete success, only say "done" once.
37622 - Clients are now willing to load balance over up to 2mB, not 1mB,
37623 of advertised bandwidth capacity.
37624 - Add a NoPublish config option, so you can be a server (e.g. for
37625 testing running Tor servers in other Tor networks) without
37626 publishing your descriptor to the primary dirservers.
37629 Changes in version 0.1.0.3-rc - 2005-04-08
37630 o Improvements on 0.1.0.2-rc:
37631 - Client now retries when streams end early for 'hibernating' or
37632 'resource limit' reasons, rather than failing them.
37633 - More automated handling for dirserver operators:
37634 - Automatically approve nodes running 0.1.0.2-rc or later,
37635 now that the the reachability detection stuff is working.
37636 - Now we allow two unverified servers with the same nickname
37637 but different keys. But if a nickname is verified, only that
37638 nickname+key are allowed.
37639 - If you're an authdirserver connecting to an address:port,
37640 and it's not the OR you were expecting, forget about that
37641 descriptor. If he *was* the one you were expecting, then forget
37642 about all other descriptors for that address:port.
37643 - Allow servers to publish descriptors from 12 hours in the future.
37644 Corollary: only whine about clock skew from the dirserver if
37645 he's a trusted dirserver (since now even verified servers could
37646 have quite wrong clocks).
37647 - Adjust maximum skew and age for rendezvous descriptors: let skew
37648 be 48 hours rather than 90 minutes.
37649 - Efficiency improvements:
37650 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
37651 it much faster to look up a circuit for each relay cell.
37652 - Remove most calls to assert_all_pending_dns_resolves_ok(),
37653 since they're eating our cpu on exit nodes.
37654 - Stop wasting time doing a case insensitive comparison for every
37655 dns name every time we do any lookup. Canonicalize the names to
37656 lowercase and be done with it.
37657 - Start sending 'truncated' cells back rather than destroy cells,
37658 if the circuit closes in front of you. This means we won't have
37659 to abandon partially built circuits.
37660 - Only warn once per nickname from add_nickname_list_to_smartlist
37661 per failure, so an entrynode or exitnode choice that's down won't
37663 - Put a note in the torrc about abuse potential with the default
37665 - Revise control spec and implementation to allow all log messages to
37666 be sent to controller with their severities intact (suggested by
37667 Matt Edman). Update TorControl to handle new log event types.
37668 - Provide better explanation messages when controller's POSTDESCRIPTOR
37670 - Stop putting nodename in the Platform string in server descriptors.
37671 It doesn't actually help, and it is confusing/upsetting some people.
37673 o Bugfixes on 0.1.0.2-rc:
37674 - We were printing the host mask wrong in exit policies in server
37675 descriptors. This isn't a critical bug though, since we were still
37676 obeying the exit policy internally.
37677 - Fix Tor when compiled with libevent but without pthreads: move
37678 connection_unregister() from _connection_free() to
37680 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
37681 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
37682 when we look through the connection array, we'll find any of the
37683 cpu/dnsworkers. This is no good.
37685 o Bugfixes on 0.0.9.8:
37686 - Fix possible bug on threading platforms (e.g. win32) which was
37687 leaking a file descriptor whenever a cpuworker or dnsworker died.
37688 - When using preferred entry or exit nodes, ignore whether the
37689 circuit wants uptime or capacity. They asked for the nodes, they
37691 - chdir() to your datadirectory at the *end* of the daemonize process,
37692 not the beginning. This was a problem because the first time you
37693 run tor, if your datadir isn't there, and you have runasdaemon set
37694 to 1, it will try to chdir to it before it tries to create it. Oops.
37695 - Handle changed router status correctly when dirserver reloads
37696 fingerprint file. We used to be dropping all unverified descriptors
37697 right then. The bug was hidden because we would immediately
37698 fetch a directory from another dirserver, which would include the
37699 descriptors we just dropped.
37700 - When we're connecting to an OR and he's got a different nickname/key
37701 than we were expecting, only complain loudly if we're an OP or a
37702 dirserver. Complaining loudly to the OR admins just confuses them.
37703 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
37704 artificially capped at 500kB.
37707 Changes in version 0.0.9.8 - 2005-04-07
37708 o Bugfixes on 0.0.9.x:
37709 - We have a bug that I haven't found yet. Sometimes, very rarely,
37710 cpuworkers get stuck in the 'busy' state, even though the cpuworker
37711 thinks of itself as idle. This meant that no new circuits ever got
37712 established. Here's a workaround to kill any cpuworker that's been
37713 busy for more than 100 seconds.
37716 Changes in version 0.1.0.2-rc - 2005-04-01
37717 o Bugfixes on 0.1.0.1-rc:
37718 - Fixes on reachability detection:
37719 - Don't check for reachability while hibernating.
37720 - If ORPort is reachable but DirPort isn't, still publish the
37721 descriptor, but zero out DirPort until it's found reachable.
37722 - When building testing circs for ORPort testing, use only
37723 high-bandwidth nodes, so fewer circuits fail.
37724 - Complain about unreachable ORPort separately from unreachable
37725 DirPort, so the user knows what's going on.
37726 - Make sure we only conclude ORPort reachability if we didn't
37727 initiate the conn. Otherwise we could falsely conclude that
37728 we're reachable just because we connected to the guy earlier
37729 and he used that same pipe to extend to us.
37730 - Authdirservers shouldn't do ORPort reachability detection,
37731 since they're in clique mode, so it will be rare to find a
37732 server not already connected to them.
37733 - When building testing circuits, always pick middle hops running
37734 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
37735 bug. (This is a kludge; it will go away when 0.0.9.x becomes
37737 - When we decide we're reachable, actually publish our descriptor
37739 - Fix bug in redirectstream in the controller.
37740 - Fix the state descriptor strings so logs don't claim edge streams
37741 are in a different state than they actually are.
37742 - Use recent libevent features when possible (this only really affects
37743 win32 and osx right now, because the new libevent with these
37744 features hasn't been released yet). Add code to suppress spurious
37746 - Prevent possible segfault in connection_close_unattached_ap().
37747 - Fix newlines on torrc in win32.
37748 - Improve error msgs when tor-resolve fails.
37750 o Improvements on 0.0.9.x:
37751 - New experimental script tor/contrib/ExerciseServer.py (needs more
37752 work) that uses the controller interface to build circuits and
37753 fetch pages over them. This will help us bootstrap servers that
37754 have lots of capacity but haven't noticed it yet.
37755 - New experimental script tor/contrib/PathDemo.py (needs more work)
37756 that uses the controller interface to let you choose whole paths
37758 "<hostname>.<path,separated by dots>.<length of path>.path"
37759 - When we've connected to an OR and handshaked but didn't like
37760 the result, we were closing the conn without sending destroy
37761 cells back for pending circuits. Now send those destroys.
37764 Changes in version 0.0.9.7 - 2005-04-01
37765 o Bugfixes on 0.0.9.x:
37766 - Fix another race crash bug (thanks to Glenn Fink for reporting).
37767 - Compare identity to identity, not to nickname, when extending to
37768 a router not already in the directory. This was preventing us from
37769 extending to unknown routers. Oops.
37770 - Make sure to create OS X Tor user in <500 range, so we aren't
37771 creating actual system users.
37772 - Note where connection-that-hasn't-sent-end was marked, and fix
37773 a few really loud instances of this harmless bug (it's fixed more
37777 Changes in version 0.1.0.1-rc - 2005-03-28
37779 - Add reachability testing. Your Tor server will automatically try
37780 to see if its ORPort and DirPort are reachable from the outside,
37781 and it won't upload its descriptor until it decides they are.
37782 - Handle unavailable hidden services better. Handle slow or busy
37783 hidden services better.
37784 - Add support for CONNECTing through https proxies, with "HttpsProxy"
37786 - New exit policy: accept most low-numbered ports, rather than
37787 rejecting most low-numbered ports.
37788 - More Tor controller support (still experimental). See
37789 http://tor.eff.org/doc/control-spec.txt for all the new features,
37790 including signals to emulate unix signals from any platform;
37791 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
37792 closestream; closecircuit; etc.
37793 - Make nt services work and start on startup on win32 (based on
37794 patch by Matt Edman).
37795 - Add a new AddressMap config directive to rewrite incoming socks
37796 addresses. This lets you, for example, declare an implicit
37797 required exit node for certain sites.
37798 - Add a new TrackHostExits config directive to trigger addressmaps
37799 for certain incoming socks addresses -- for sites that break when
37800 your exit keeps changing (based on patch by Mike Perry).
37801 - Redo the client-side dns cache so it's just an addressmap too.
37802 - Notice when our IP changes, and reset stats/uptime/reachability.
37803 - When an application is using socks5, give him the whole variety of
37804 potential socks5 responses (connect refused, host unreachable, etc),
37805 rather than just "success" or "failure".
37806 - A more sane version numbering system. See
37807 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
37808 - New contributed script "exitlist": a simple python script to
37809 parse directories and find Tor nodes that exit to listed
37811 - New contributed script "privoxy-tor-toggle" to toggle whether
37812 Privoxy uses Tor. Seems to be configured for Debian by default.
37813 - Report HTTP reasons to client when getting a response from directory
37814 servers -- so you can actually know what went wrong.
37815 - New config option MaxAdvertisedBandwidth which lets you advertise
37816 a low bandwidthrate (to not attract as many circuits) while still
37817 allowing a higher bandwidthrate in reality.
37819 o Robustness/stability fixes:
37820 - Make Tor use Niels Provos's libevent instead of its current
37821 poll-but-sometimes-select mess. This will let us use faster async
37822 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
37824 - pthread support now too. This was forced because when we forked,
37825 we ended up wasting a lot of duplicate ram over time. Also switch
37826 to foo_r versions of some library calls to allow reentry and
37828 - Better handling for heterogeneous / unreliable nodes:
37829 - Annotate circuits w/ whether they aim to contain high uptime nodes
37830 and/or high capacity nodes. When building circuits, choose
37832 - This means that every single node in an intro rend circuit,
37833 not just the last one, will have a minimum uptime.
37834 - New config option LongLivedPorts to indicate application streams
37835 that will want high uptime circuits.
37836 - Servers reset uptime when a dir fetch entirely fails. This
37837 hopefully reflects stability of the server's network connectivity.
37838 - If somebody starts his tor server in Jan 2004 and then fixes his
37839 clock, don't make his published uptime be a year.
37840 - Reset published uptime when you wake up from hibernation.
37841 - Introduce a notion of 'internal' circs, which are chosen without
37842 regard to the exit policy of the last hop. Intro and rendezvous
37843 circs must be internal circs, to avoid leaking information. Resolve
37844 and connect streams can use internal circs if they want.
37845 - New circuit pooling algorithm: make sure to have enough circs around
37846 to satisfy any predicted ports, and also make sure to have 2 internal
37847 circs around if we've required internal circs lately (and with high
37848 uptime if we've seen that lately too).
37849 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
37850 which describes how often we retry making new circuits if current
37851 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
37852 how long we're willing to make use of an already-dirty circuit.
37853 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
37854 circ as necessary, if there are any completed ones lying around
37855 when we try to launch one.
37856 - Make hidden services try to establish a rendezvous for 30 seconds,
37857 rather than for n (where n=3) attempts to build a circuit.
37858 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
37859 "ShutdownWaitLength".
37860 - Try to be more zealous about calling connection_edge_end when
37861 things go bad with edge conns in connection.c.
37862 - Revise tor-spec to add more/better stream end reasons.
37863 - Revise all calls to connection_edge_end to avoid sending "misc",
37864 and to take errno into account where possible.
37867 - Fix a race condition that can trigger an assert, when we have a
37868 pending create cell and an OR connection fails right then.
37869 - Fix several double-mark-for-close bugs, e.g. where we were finding
37870 a conn for a cell even if that conn is already marked for close.
37871 - Make sequence of log messages when starting on win32 with no config
37872 file more reasonable.
37873 - When choosing an exit node for a new non-internal circ, don't take
37874 into account whether it'll be useful for any pending x.onion
37875 addresses -- it won't.
37876 - Turn addr_policy_compare from a tristate to a quadstate; this should
37877 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
37878 for google.com" problem.
37879 - Make "platform" string in descriptor more accurate for Win32 servers,
37880 so it's not just "unknown platform".
37881 - Fix an edge case in parsing config options (thanks weasel).
37882 If they say "--" on the commandline, it's not an option.
37883 - Reject odd-looking addresses at the client (e.g. addresses that
37884 contain a colon), rather than having the server drop them because
37886 - tor-resolve requests were ignoring .exit if there was a working circuit
37887 they could use instead.
37888 - REUSEADDR on normal platforms means you can rebind to the port
37889 right after somebody else has let it go. But REUSEADDR on win32
37890 means to let you bind to the port _even when somebody else
37891 already has it bound_! So, don't do that on Win32.
37892 - Change version parsing logic: a version is "obsolete" if it is not
37893 recommended and (1) there is a newer recommended version in the
37894 same series, or (2) there are no recommended versions in the same
37895 series, but there are some recommended versions in a newer series.
37896 A version is "new" if it is newer than any recommended version in
37898 - Stop most cases of hanging up on a socks connection without sending
37902 - Require BandwidthRate to be at least 20kB/s for servers.
37903 - When a dirserver causes you to give a warn, mention which dirserver
37905 - New config option DirAllowPrivateAddresses for authdirservers.
37906 Now by default they refuse router descriptors that have non-IP or
37907 private-IP addresses.
37908 - Stop publishing socksport in the directory, since it's not
37909 actually meant to be public. For compatibility, publish a 0 there
37911 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
37912 smart" value, that is low for servers and high for clients.
37913 - If our clock jumps forward by 100 seconds or more, assume something
37914 has gone wrong with our network and abandon all not-yet-used circs.
37915 - Warn when exit policy implicitly allows local addresses.
37916 - If we get an incredibly skewed timestamp from a dirserver mirror
37917 that isn't a verified OR, don't warn -- it's probably him that's
37919 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
37920 cookies to disk and doesn't log each web request to disk. (Thanks
37921 to Brett Carrington for pointing this out.)
37922 - When a client asks us for a dir mirror and we don't have one,
37923 launch an attempt to get a fresh one.
37924 - If we're hibernating and we get a SIGINT, exit immediately.
37925 - Add --with-dmalloc ./configure option, to track memory leaks.
37926 - And try to free all memory on closing, so we can detect what
37928 - Cache local dns resolves correctly even when they're .exit
37930 - Give a better warning when some other server advertises an
37931 ORPort that is actually an apache running ssl.
37932 - Add "opt hibernating 1" to server descriptor to make it clearer
37933 whether the server is hibernating.
37936 Changes in version 0.0.9.6 - 2005-03-24
37937 o Bugfixes on 0.0.9.x (crashes and asserts):
37938 - Add new end stream reasons to maintenance branch. Fix bug where
37939 reason (8) could trigger an assert. Prevent bug from recurring.
37940 - Apparently win32 stat wants paths to not end with a slash.
37941 - Fix assert triggers in assert_cpath_layer_ok(), where we were
37942 blowing away the circuit that conn->cpath_layer points to, then
37943 checking to see if the circ is well-formed. Backport check to make
37944 sure we dont use the cpath on a closed connection.
37945 - Prevent circuit_resume_edge_reading_helper() from trying to package
37946 inbufs for marked-for-close streams.
37947 - Don't crash on hup if your options->address has become unresolvable.
37948 - Some systems (like OS X) sometimes accept() a connection and tell
37949 you the remote host is 0.0.0.0:0. If this happens, due to some
37950 other mis-features, we get confused; so refuse the conn for now.
37952 o Bugfixes on 0.0.9.x (other):
37953 - Fix harmless but scary "Unrecognized content encoding" warn message.
37954 - Add new stream error reason: TORPROTOCOL reason means "you are not
37955 speaking a version of Tor I understand; say bye-bye to your stream."
37956 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
37957 into the future, now that we are more tolerant of skew. This
37958 resolves a bug where a Tor server would refuse to cache a directory
37959 because all the directories it gets are too far in the future;
37960 yet the Tor server never logs any complaints about clock skew.
37961 - Mac packaging magic: make man pages useable, and do not overwrite
37962 existing torrc files.
37963 - Make OS X log happily to /var/log/tor/tor.log
37966 Changes in version 0.0.9.5 - 2005-02-22
37967 o Bugfixes on 0.0.9.x:
37968 - Fix an assert race at exit nodes when resolve requests fail.
37969 - Stop picking unverified dir mirrors--it only leads to misery.
37970 - Patch from Matt Edman to make NT services work better. Service
37971 support is still not compiled into the executable by default.
37972 - Patch from Dmitri Bely so the Tor service runs better under
37973 the win32 SYSTEM account.
37974 - Make tor-resolve actually work (?) on Win32.
37975 - Fix a sign bug when getrlimit claims to have 4+ billion
37976 file descriptors available.
37977 - Stop refusing to start when bandwidthburst == bandwidthrate.
37978 - When create cells have been on the onion queue more than five
37979 seconds, just send back a destroy and take them off the list.
37982 Changes in version 0.0.9.4 - 2005-02-03
37983 o Bugfixes on 0.0.9:
37984 - Fix an assert bug that took down most of our servers: when
37985 a server claims to have 1 GB of bandwidthburst, don't
37987 - Don't crash as badly if we have spawned the max allowed number
37988 of dnsworkers, or we're out of file descriptors.
37989 - Block more file-sharing ports in the default exit policy.
37990 - MaxConn is now automatically set to the hard limit of max
37991 file descriptors we're allowed (ulimit -n), minus a few for
37993 - Give a clearer message when servers need to raise their
37994 ulimit -n when they start running out of file descriptors.
37995 - SGI Compatibility patches from Jan Schaumann.
37996 - Tolerate a corrupt cached directory better.
37997 - When a dirserver hasn't approved your server, list which one.
37998 - Go into soft hibernation after 95% of the bandwidth is used,
37999 not 99%. This is especially important for daily hibernators who
38000 have a small accounting max. Hopefully it will result in fewer
38001 cut connections when the hard hibernation starts.
38002 - Load-balance better when using servers that claim more than
38003 800kB/s of capacity.
38004 - Make NT services work (experimental, only used if compiled in).
38007 Changes in version 0.0.9.3 - 2005-01-21
38008 o Bugfixes on 0.0.9:
38009 - Backport the cpu use fixes from main branch, so busy servers won't
38010 need as much processor time.
38011 - Work better when we go offline and then come back, or when we
38012 run Tor at boot before the network is up. We do this by
38013 optimistically trying to fetch a new directory whenever an
38014 application request comes in and we think we're offline -- the
38015 human is hopefully a good measure of when the network is back.
38016 - Backport some minimal hidserv bugfixes: keep rend circuits open as
38017 long as you keep using them; actually publish hidserv descriptors
38018 shortly after they change, rather than waiting 20-40 minutes.
38019 - Enable Mac startup script by default.
38020 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
38021 - When you update AllowUnverifiedNodes or FirewallPorts via the
38022 controller's setconf feature, we were always appending, never
38024 - When you update HiddenServiceDir via setconf, it was screwing up
38025 the order of reading the lines, making it fail.
38026 - Do not rewrite a cached directory back to the cache; otherwise we
38027 will think it is recent and not fetch a newer one on startup.
38028 - Workaround for webservers that lie about Content-Encoding: Tor
38029 now tries to autodetect compressed directories and compression
38030 itself. This lets us Proxypass dir fetches through apache.
38033 Changes in version 0.0.9.2 - 2005-01-04
38034 o Bugfixes on 0.0.9 (crashes and asserts):
38035 - Fix an assert on startup when the disk is full and you're logging
38037 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
38038 style address, then we'd crash.
38039 - Fix an assert trigger when the running-routers string we get from
38040 a dirserver is broken.
38041 - Make worker threads start and run on win32. Now win32 servers
38043 - Bandaid (not actually fix, but now it doesn't crash) an assert
38044 where the dns worker dies mysteriously and the main Tor process
38045 doesn't remember anything about the address it was resolving.
38047 o Bugfixes on 0.0.9 (Win32):
38048 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
38049 name out of the warning/assert messages.
38050 - Fix a superficial "unhandled error on read" bug on win32.
38051 - The win32 installer no longer requires a click-through for our
38052 license, since our Free Software license grants rights but does not
38054 - Win32: When connecting to a dirserver fails, try another one
38055 immediately. (This was already working for non-win32 Tors.)
38056 - Stop trying to parse $HOME on win32 when hunting for default
38058 - Make tor-resolve.c work on win32 by calling network_init().
38060 o Bugfixes on 0.0.9 (other):
38061 - Make 0.0.9.x build on Solaris again.
38062 - Due to a fencepost error, we were blowing away the \n when reporting
38063 confvalue items in the controller. So asking for multiple config
38064 values at once couldn't work.
38065 - When listing circuits that are pending on an opening OR connection,
38066 if we're an OR we were listing circuits that *end* at us as
38067 being pending on every listener, dns/cpu worker, etc. Stop that.
38068 - Dirservers were failing to create 'running-routers' or 'directory'
38069 strings if we had more than some threshold of routers. Fix them so
38070 they can handle any number of routers.
38071 - Fix a superficial "Duplicate mark for close" bug.
38072 - Stop checking for clock skew for OR connections, even for servers.
38073 - Fix a fencepost error that was chopping off the last letter of any
38074 nickname that is the maximum allowed nickname length.
38075 - Update URLs in log messages so they point to the new website.
38076 - Fix a potential problem in mangling server private keys while
38077 writing to disk (not triggered yet, as far as we know).
38078 - Include the licenses for other free software we include in Tor,
38079 now that we're shipping binary distributions more regularly.
38082 Changes in version 0.0.9.1 - 2004-12-15
38083 o Bugfixes on 0.0.9:
38084 - Make hibernation actually work.
38085 - Make HashedControlPassword config option work.
38086 - When we're reporting event circuit status to a controller,
38087 don't use the stream status code.
38090 Changes in version 0.0.9 - 2004-12-12
38092 - Clean up manpage and torrc.sample file.
38093 - Clean up severities and text of log warnings.
38095 - Make servers trigger an assert when they enter hibernation.
38098 Changes in version 0.0.9rc7 - 2004-12-08
38099 o Bugfixes on 0.0.9rc:
38100 - Fix a stack-trashing crash when an exit node begins hibernating.
38101 - Avoid looking at unallocated memory while considering which
38102 ports we need to build circuits to cover.
38103 - Stop a sigpipe: when an 'end' cell races with eof from the app,
38104 we shouldn't hold-open-until-flush if the eof arrived first.
38105 - Fix a bug with init_cookie_authentication() in the controller.
38106 - When recommending new-format log lines, if the upper bound is
38107 LOG_ERR, leave it implicit.
38109 o Bugfixes on 0.0.8.1:
38110 - Fix a whole slew of memory leaks.
38111 - Fix isspace() and friends so they still make Solaris happy
38112 but also so they don't trigger asserts on win32.
38113 - Fix parse_iso_time on platforms without strptime (eg win32).
38114 - win32: tolerate extra "readable" events better.
38115 - win32: when being multithreaded, leave parent fdarray open.
38116 - Make unit tests work on win32.
38119 Changes in version 0.0.9rc6 - 2004-12-06
38120 o Bugfixes on 0.0.9pre:
38121 - Clean up some more integer underflow opportunities (not exploitable
38123 - While hibernating, hup should not regrow our listeners.
38124 - Send an end to the streams we close when we hibernate, rather
38125 than just chopping them off.
38126 - React to eof immediately on non-open edge connections.
38128 o Bugfixes on 0.0.8.1:
38129 - Calculate timeout for waiting for a connected cell from the time
38130 we sent the begin cell, not from the time the stream started. If
38131 it took a long time to establish the circuit, we would time out
38132 right after sending the begin cell.
38133 - Fix router_compare_addr_to_addr_policy: it was not treating a port
38134 of * as always matching, so we were picking reject *:* nodes as
38135 exit nodes too. Oops.
38138 - New circuit building strategy: keep a list of ports that we've
38139 used in the past 6 hours, and always try to have 2 circuits open
38140 or on the way that will handle each such port. Seed us with port
38141 80 so web users won't complain that Tor is "slow to start up".
38142 - Make kill -USR1 dump more useful stats about circuits.
38143 - When warning about retrying or giving up, print the address, so
38144 the user knows which one it's talking about.
38145 - If you haven't used a clean circuit in an hour, throw it away,
38146 just to be on the safe side. (This means after 6 hours a totally
38147 unused Tor client will have no circuits open.)
38150 Changes in version 0.0.9rc5 - 2004-12-01
38151 o Bugfixes on 0.0.8.1:
38152 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
38153 - Let resolve conns retry/expire also, rather than sticking around
38155 - If we are using select, make sure we stay within FD_SETSIZE.
38157 o Bugfixes on 0.0.9pre:
38158 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
38159 but doesn't seem to be currently; thanks to Ilja van Sprundel for
38161 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
38162 instead. Impose minima and maxima for all *Period options; impose
38163 even tighter maxima for fetching if we are a caching dirserver.
38164 Clip rather than rejecting.
38165 - Fetch cached running-routers from servers that serve it (that is,
38166 authdirservers and servers running 0.0.9rc5-cvs or later.)
38169 - Accept *:706 (silc) in default exit policy.
38170 - Implement new versioning format for post 0.1.
38171 - Support "foo.nickname.exit" addresses, to let Alice request the
38172 address "foo" as viewed by exit node "nickname". Based on a patch
38174 - Make tor --version --version dump the cvs Id of every file.
38177 Changes in version 0.0.9rc4 - 2004-11-28
38178 o Bugfixes on 0.0.8.1:
38179 - Make windows sockets actually non-blocking (oops), and handle
38180 win32 socket errors better.
38182 o Bugfixes on 0.0.9rc1:
38183 - Actually catch the -USR2 signal.
38186 Changes in version 0.0.9rc3 - 2004-11-25
38187 o Bugfixes on 0.0.8.1:
38188 - Flush the log file descriptor after we print "Tor opening log file",
38189 so we don't see those messages days later.
38191 o Bugfixes on 0.0.9rc1:
38192 - Make tor-resolve work again.
38193 - Avoid infinite loop in tor-resolve if tor hangs up on it.
38194 - Fix an assert trigger for clients/servers handling resolves.
38197 Changes in version 0.0.9rc2 - 2004-11-24
38198 o Bugfixes on 0.0.9rc1:
38199 - I broke socks5 support while fixing the eof bug.
38200 - Allow unitless bandwidths and intervals; they default to bytes
38202 - New servers don't start out hibernating; they are active until
38203 they run out of bytes, so they have a better estimate of how
38204 long it takes, and so their operators can know they're working.
38207 Changes in version 0.0.9rc1 - 2004-11-23
38208 o Bugfixes on 0.0.8.1:
38209 - Finally fix a bug that's been plaguing us for a year:
38210 With high load, circuit package window was reaching 0. Whenever
38211 we got a circuit-level sendme, we were reading a lot on each
38212 socket, but only writing out a bit. So we would eventually reach
38213 eof. This would be noticed and acted on even when there were still
38214 bytes sitting in the inbuf.
38215 - When poll() is interrupted, we shouldn't believe the revents values.
38217 o Bugfixes on 0.0.9pre6:
38218 - Fix hibernate bug that caused pre6 to be broken.
38219 - Don't keep rephist info for routers that haven't had activity for
38220 24 hours. (This matters now that clients have keys, since we track
38222 - Never call close_temp_logs while validating log options.
38223 - Fix backslash-escaping on tor.sh.in and torctl.in.
38226 - Implement weekly/monthly/daily accounting: now you specify your
38227 hibernation properties by
38228 AccountingMax N bytes|KB|MB|GB|TB
38229 AccountingStart day|week|month [day] HH:MM
38230 Defaults to "month 1 0:00".
38231 - Let bandwidth and interval config options be specified as 5 bytes,
38232 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
38233 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
38234 get back to normal.)
38235 - If your requested entry or exit node has advertised bandwidth 0,
38237 - Be more greedy about filling up relay cells -- we try reading again
38238 once we've processed the stuff we read, in case enough has arrived
38239 to fill the last cell completely.
38240 - Apply NT service patch from Osamu Fujino. Still needs more work.
38243 Changes in version 0.0.9pre6 - 2004-11-15
38244 o Bugfixes on 0.0.8.1:
38245 - Fix assert failure on malformed socks4a requests.
38246 - Use identity comparison, not nickname comparison, to choose which
38247 half of circuit-ID-space each side gets to use. This is needed
38248 because sometimes we think of a router as a nickname, and sometimes
38249 as a hex ID, and we can't predict what the other side will do.
38250 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
38251 write() call will fail and we handle it there.
38252 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
38253 and smartlist_len, which are two major profiling offenders.
38255 o Bugfixes on 0.0.9pre5:
38256 - Fix a bug in read_all that was corrupting config files on windows.
38257 - When we're raising the max number of open file descriptors to
38258 'unlimited', don't log that we just raised it to '-1'.
38259 - Include event code with events, as required by control-spec.txt.
38260 - Don't give a fingerprint when clients do --list-fingerprint:
38261 it's misleading, because it will never be the same again.
38262 - Stop using strlcpy in tor_strndup, since it was slowing us
38264 - Remove warn on startup about missing cached-directory file.
38265 - Make kill -USR1 work again.
38266 - Hibernate if we start tor during the "wait for wakeup-time" phase
38267 of an accounting interval. Log our hibernation plans better.
38268 - Authoritative dirservers now also cache their directory, so they
38269 have it on start-up.
38272 - Fetch running-routers; cache running-routers; compress
38273 running-routers; serve compressed running-routers.z
38274 - Add NSI installer script contributed by J Doe.
38275 - Commit VC6 and VC7 workspace/project files.
38276 - Commit a tor.spec for making RPM files, with help from jbash.
38277 - Add contrib/torctl.in contributed by Glenn Fink.
38278 - Implement the control-spec's SAVECONF command, to write your
38279 configuration to torrc.
38280 - Get cookie authentication for the controller closer to working.
38281 - Include control-spec.txt in the tarball.
38282 - When set_conf changes our server descriptor, upload a new copy.
38283 But don't upload it too often if there are frequent changes.
38284 - Document authentication config in man page, and document signals
38286 - Clean up confusing parts of man page and torrc.sample.
38287 - Make expand_filename handle ~ and ~username.
38288 - Use autoconf to enable largefile support where necessary. Use
38289 ftello where available, since ftell can fail at 2GB.
38290 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
38291 log more informatively.
38292 - Give a slightly more useful output for "tor -h".
38293 - Refuse application socks connections to port 0.
38294 - Check clock skew for verified servers, but allow unverified
38295 servers and clients to have any clock skew.
38296 - Break DirFetchPostPeriod into:
38297 - DirFetchPeriod for fetching full directory,
38298 - StatusFetchPeriod for fetching running-routers,
38299 - DirPostPeriod for posting server descriptor,
38300 - RendPostPeriod for posting hidden service descriptors.
38301 - Make sure the hidden service descriptors are at a random offset
38302 from each other, to hinder linkability.
38305 Changes in version 0.0.9pre5 - 2004-11-09
38306 o Bugfixes on 0.0.9pre4:
38307 - Fix a seg fault in unit tests (doesn't affect main program).
38308 - Fix an assert bug where a hidden service provider would fail if
38309 the first hop of his rendezvous circuit was down.
38310 - Hidden service operators now correctly handle version 1 style
38311 INTRODUCE1 cells (nobody generates them still, so not a critical
38313 - If do_hup fails, actually notice.
38314 - Handle more errnos from accept() without closing the listener.
38315 Some OpenBSD machines were closing their listeners because
38316 they ran out of file descriptors.
38317 - Send resolve cells to exit routers that are running a new
38318 enough version of the resolve code to work right.
38319 - Better handling of winsock includes on non-MSV win32 compilers.
38320 - Some people had wrapped their tor client/server in a script
38321 that would restart it whenever it died. This did not play well
38322 with our "shut down if your version is obsolete" code. Now people
38323 don't fetch a new directory if their local cached version is
38325 - Make our autogen.sh work on ksh as well as bash.
38328 - Hibernation: New config option "AccountingMaxKB" lets you
38329 set how many KBytes per month you want to allow your server to
38330 consume. Rather than spreading those bytes out evenly over the
38331 month, we instead hibernate for some of the month and pop up
38332 at a deterministic time, work until the bytes are consumed, then
38333 hibernate again. Config option "MonthlyAccountingStart" lets you
38334 specify which day of the month your billing cycle starts on.
38335 - Control interface: a separate program can now talk to your
38336 client/server over a socket, and get/set config options, receive
38337 notifications of circuits and streams starting/finishing/dying,
38338 bandwidth used, etc. The next step is to get some GUIs working.
38339 Let us know if you want to help out. See doc/control-spec.txt .
38340 - Ship a contrib/tor-control.py as an example script to interact
38341 with the control port.
38342 - "tor --hash-password zzyxz" will output a salted password for
38343 use in authenticating to the control interface.
38344 - New log format in config:
38345 "Log minsev[-maxsev] stdout|stderr|syslog" or
38346 "Log minsev[-maxsev] file /var/foo"
38349 - DirPolicy config option, to let people reject incoming addresses
38350 from their dirserver.
38351 - "tor --list-fingerprint" will list your identity key fingerprint
38353 - Add "pass" target for RedirectExit, to make it easier to break
38354 out of a sequence of RedirectExit rules.
38355 - Clients now generate a TLS cert too, in preparation for having
38356 them act more like real nodes.
38357 - Ship src/win32/ in the tarball, so people can use it to build.
38358 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
38360 - New "router-status" line in directory, to better bind each verified
38361 nickname to its identity key.
38362 - Deprecate unofficial config option abbreviations, and abbreviations
38363 not on the command line.
38364 - Add a pure-C tor-resolve implementation.
38365 - Use getrlimit and friends to ensure we can reach MaxConn (currently
38366 1024) file descriptors.
38368 o Code security improvements, inspired by Ilja:
38369 - Replace sprintf with snprintf. (I think they were all safe, but
38371 - Replace strcpy/strncpy with strlcpy in more places.
38372 - Avoid strcat; use snprintf or strlcat instead.
38373 - snprintf wrapper with consistent (though not C99) overflow behavior.
38376 Changes in version 0.0.9pre4 - 2004-10-17
38377 o Bugfixes on 0.0.9pre3:
38378 - If the server doesn't specify an exit policy, use the real default
38379 exit policy, not reject *:*.
38380 - Ignore fascistfirewall when uploading/downloading hidden service
38381 descriptors, since we go through Tor for those; and when using
38382 an HttpProxy, since we assume it can reach them all.
38383 - When looking for an authoritative dirserver, use only the ones
38384 configured at boot. Don't bother looking in the directory.
38385 - The rest of the fix for get_default_conf_file() on older win32.
38386 - Make 'Routerfile' config option obsolete.
38389 - New 'MyFamily nick1,...' config option for a server to
38390 specify other servers that shouldn't be used in the same circuit
38391 with it. Only believed if nick1 also specifies us.
38392 - New 'NodeFamily nick1,nick2,...' config option for a client to
38393 specify nodes that it doesn't want to use in the same circuit.
38394 - New 'Redirectexit pattern address:port' config option for a
38395 server to redirect exit connections, e.g. to a local squid.
38398 Changes in version 0.0.9pre3 - 2004-10-13
38399 o Bugfixes on 0.0.8.1:
38400 - Better torrc example lines for dirbindaddress and orbindaddress.
38401 - Improved bounds checking on parsed ints (e.g. config options and
38402 the ones we find in directories.)
38403 - Better handling of size_t vs int, so we're more robust on 64
38405 - Fix the rest of the bug where a newly started OR would appear
38406 as unverified even after we've added his fingerprint and hupped
38408 - Fix a bug from 0.0.7: when read() failed on a stream, we would
38409 close it without sending back an end. So 'connection refused'
38410 would simply be ignored and the user would get no response.
38412 o Bugfixes on 0.0.9pre2:
38413 - Serving the cached-on-disk directory to people is bad. We now
38414 provide no directory until we've fetched a fresh one.
38415 - Workaround for bug on windows where cached-directories get crlf
38417 - Make get_default_conf_file() work on older windows too.
38418 - If we write a *:* exit policy line in the descriptor, don't write
38419 any more exit policy lines.
38422 - Use only 0.0.9pre1 and later servers for resolve cells.
38423 - Make the dirservers file obsolete.
38424 - Include a dir-signing-key token in directories to tell the
38425 parsing entity which key is being used to sign.
38426 - Remove the built-in bulky default dirservers string.
38427 - New config option "Dirserver %s:%d [fingerprint]", which can be
38428 repeated as many times as needed. If no dirservers specified,
38429 default to moria1,moria2,tor26.
38430 - Make moria2 advertise a dirport of 80, so people behind firewalls
38431 will be able to get a directory.
38432 - Http proxy support
38433 - Dirservers translate requests for http://%s:%d/x to /x
38434 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
38435 be routed through this host.
38436 - Clients ask for /tor/x rather than /x for new enough dirservers.
38437 This way we can one day coexist peacefully with apache.
38438 - Clients specify a "Host: %s%d" http header, to be compatible
38439 with more proxies, and so running squid on an exit node can work.
38442 Changes in version 0.0.8.1 - 2004-10-13
38444 - Fix a seg fault that can be triggered remotely for Tor
38445 clients/servers with an open dirport.
38446 - Fix a rare assert trigger, where routerinfos for entries in
38447 our cpath would expire while we're building the path.
38448 - Fix a bug in OutboundBindAddress so it (hopefully) works.
38449 - Fix a rare seg fault for people running hidden services on
38450 intermittent connections.
38451 - Fix a bug in parsing opt keywords with objects.
38452 - Fix a stale pointer assert bug when a stream detaches and
38454 - Fix a string format vulnerability (probably not exploitable)
38455 in reporting stats locally.
38456 - Fix an assert trigger: sometimes launching circuits can fail
38457 immediately, e.g. because too many circuits have failed recently.
38458 - Fix a compile warning on 64 bit platforms.
38461 Changes in version 0.0.9pre2 - 2004-10-03
38463 - Make fetching a cached directory work for 64-bit platforms too.
38464 - Make zlib.h a required header, not an optional header.
38467 Changes in version 0.0.9pre1 - 2004-10-01
38469 - Stop using separate defaults for no-config-file and
38470 empty-config-file. Now you have to explicitly turn off SocksPort,
38471 if you don't want it open.
38472 - Fix a bug in OutboundBindAddress so it (hopefully) works.
38473 - Improve man page to mention more of the 0.0.8 features.
38474 - Fix a rare seg fault for people running hidden services on
38475 intermittent connections.
38476 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
38478 - Fix more dns related bugs: send back resolve_failed and end cells
38479 more reliably when the resolve fails, rather than closing the
38480 circuit and then trying to send the cell. Also attach dummy resolve
38481 connections to a circuit *before* calling dns_resolve(), to fix
38482 a bug where cached answers would never be sent in RESOLVED cells.
38483 - When we run out of disk space, or other log writing error, don't
38484 crash. Just stop logging to that log and continue.
38485 - We were starting to daemonize before we opened our logs, so if
38486 there were any problems opening logs, we would complain to stderr,
38487 which wouldn't work, and then mysteriously exit.
38488 - Fix a rare bug where sometimes a verified OR would connect to us
38489 before he'd uploaded his descriptor, which would cause us to
38490 assign conn->nickname as though he's unverified. Now we look through
38491 the fingerprint list to see if he's there.
38492 - Fix a rare assert trigger, where routerinfos for entries in
38493 our cpath would expire while we're building the path.
38496 - Clients can ask dirservers for /dir.z to get a compressed version
38497 of the directory. Only works for servers running 0.0.9, of course.
38498 - Make clients cache directories and use them to seed their router
38499 lists at startup. This means clients have a datadir again.
38500 - Configuration infrastructure support for warning on obsolete
38502 - Respond to content-encoding headers by trying to uncompress as
38504 - Reply with a deflated directory when a client asks for "dir.z".
38505 We could use allow-encodings instead, but allow-encodings isn't
38506 specified in HTTP 1.0.
38507 - Raise the max dns workers from 50 to 100.
38508 - Discourage people from setting their dirfetchpostperiod more often
38509 than once per minute.
38510 - Protect dirservers from overzealous descriptor uploading -- wait
38511 10 seconds after directory gets dirty, before regenerating.
38514 Changes in version 0.0.8 - 2004-08-25
38515 o Port it to SunOS 5.9 / Athena
38518 Changes in version 0.0.8rc2 - 2004-08-20
38519 o Make it compile on cygwin again.
38520 o When picking unverified routers, skip those with low uptime and/or
38521 low bandwidth, depending on what properties you care about.
38524 Changes in version 0.0.8rc1 - 2004-08-18
38525 o Changes from 0.0.7.3:
38527 - Fix assert triggers: if the other side returns an address 0.0.0.0,
38528 don't put it into the client dns cache.
38529 - If a begin failed due to exit policy, but we believe the IP address
38530 should have been allowed, switch that router to exitpolicy reject *:*
38531 until we get our next directory.
38533 - Clients choose nodes proportional to advertised bandwidth.
38534 - Avoid using nodes with low uptime as introduction points.
38535 - Handle servers with dynamic IP addresses: don't replace
38536 options->Address with the resolved one at startup, and
38537 detect our address right before we make a routerinfo each time.
38538 - 'FascistFirewall' option to pick dirservers and ORs on specific
38539 ports; plus 'FirewallPorts' config option to tell FascistFirewall
38540 which ports are open. (Defaults to 80,443)
38541 - Be more aggressive about trying to make circuits when the network
38542 has changed (e.g. when you unsuspend your laptop).
38543 - Check for time skew on http headers; report date in response to
38545 - If the entrynode config line has only one node, don't pick it as
38547 - Add strict{entry|exit}nodes config options. If set to 1, then
38548 we refuse to build circuits that don't include the specified entry
38550 - OutboundBindAddress config option, to bind to a specific
38551 IP address for outgoing connect()s.
38552 - End truncated log entries (e.g. directories) with "[truncated]".
38554 o Patches to 0.0.8preX:
38556 - Patches to compile and run on win32 again (maybe)?
38557 - Fix crash when looking for ~/.torrc with no $HOME set.
38558 - Fix a race bug in the unit tests.
38559 - Handle verified/unverified name collisions better when new
38560 routerinfo's arrive in a directory.
38561 - Sometimes routers were getting entered into the stats before
38562 we'd assigned their identity_digest. Oops.
38563 - Only pick and establish intro points after we've gotten a
38566 - AllowUnverifiedNodes config option to let circuits choose no-name
38567 routers in entry,middle,exit,introduction,rendezvous positions.
38568 Allow middle and rendezvous positions by default.
38569 - Add a man page for tor-resolve.
38572 Changes in version 0.0.7.3 - 2004-08-12
38573 o Stop dnsworkers from triggering an assert failure when you
38574 ask them to resolve the host "".
38577 Changes in version 0.0.8pre3 - 2004-08-09
38578 o Changes from 0.0.7.2:
38579 - Allow multiple ORs with same nickname in routerlist -- now when
38580 people give us one identity key for a nickname, then later
38581 another, we don't constantly complain until the first expires.
38582 - Remember used bandwidth (both in and out), and publish 15-minute
38583 snapshots for the past day into our descriptor.
38584 - You can now fetch $DIRURL/running-routers to get just the
38585 running-routers line, not the whole descriptor list. (But
38586 clients don't use this yet.)
38587 - When people mistakenly use Tor as an http proxy, point them
38588 at the tor-doc.html rather than the INSTALL.
38589 - Remove our mostly unused -- and broken -- hex_encode()
38590 function. Use base16_encode() instead. (Thanks to Timo Lindfors
38591 for pointing out this bug.)
38592 - Rotate onion keys every 12 hours, not every 2 hours, so we have
38593 fewer problems with people using the wrong key.
38594 - Change the default exit policy to reject the default edonkey,
38595 kazaa, gnutella ports.
38596 - Add replace_file() to util.[ch] to handle win32's rename().
38598 o Changes from 0.0.8preX:
38599 - Fix two bugs in saving onion keys to disk when rotating, so
38600 hopefully we'll get fewer people using old onion keys.
38601 - Fix an assert error that was making SocksPolicy not work.
38602 - Be willing to expire routers that have an open dirport -- it's
38603 just the authoritative dirservers we want to not forget.
38604 - Reject tor-resolve requests for .onion addresses early, so we
38605 don't build a whole rendezvous circuit and then fail.
38606 - When you're warning a server that he's unverified, don't cry
38607 wolf unpredictably.
38608 - Fix a race condition: don't try to extend onto a connection
38609 that's still handshaking.
38610 - For servers in clique mode, require the conn to be open before
38611 you'll choose it for your path.
38612 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
38613 end relay cell, etc.
38614 - Measure bandwidth capacity over the last 24 hours, not just 12
38615 - Bugfix: authoritative dirservers were making and signing a new
38616 directory for each client, rather than reusing the cached one.
38619 Changes in version 0.0.8pre2 - 2004-08-04
38620 o Changes from 0.0.7.2:
38622 - Check directory signature _before_ you decide whether you're
38623 you're running an obsolete version and should exit.
38624 - Check directory signature _before_ you parse the running-routers
38625 list to decide who's running or verified.
38626 - Bugfixes and features:
38627 - Check return value of fclose while writing to disk, so we don't
38628 end up with broken files when servers run out of disk space.
38629 - Log a warning if the user uses an unsafe socks variant, so people
38630 are more likely to learn about privoxy or socat.
38631 - Dirservers now include RFC1123-style dates in the HTTP headers,
38632 which one day we will use to better detect clock skew.
38634 o Changes from 0.0.8pre1:
38635 - Make it compile without warnings again on win32.
38636 - Log a warning if you're running an unverified server, to let you
38637 know you might want to get it verified.
38638 - Only pick a default nickname if you plan to be a server.
38641 Changes in version 0.0.8pre1 - 2004-07-23
38643 - Made our unit tests compile again on OpenBSD 3.5, and tor
38644 itself compile again on OpenBSD on a sparc64.
38645 - We were neglecting milliseconds when logging on win32, so
38646 everything appeared to happen at the beginning of each second.
38648 o Protocol changes:
38649 - 'Extend' relay cell payloads now include the digest of the
38650 intended next hop's identity key. Now we can verify that we're
38651 extending to the right router, and also extend to routers we
38652 hadn't heard of before.
38655 - Tor nodes can now act as relays (with an advertised ORPort)
38656 without being manually verified by the dirserver operators.
38657 - Uploaded descriptors of unverified routers are now accepted
38658 by the dirservers, and included in the directory.
38659 - Verified routers are listed by nickname in the running-routers
38660 list; unverified routers are listed as "$<fingerprint>".
38661 - We now use hash-of-identity-key in most places rather than
38662 nickname or addr:port, for improved security/flexibility.
38663 - To avoid Sybil attacks, paths still use only verified servers.
38664 But now we have a chance to play around with hybrid approaches.
38665 - Nodes track bandwidth usage to estimate capacity (not used yet).
38666 - ClientOnly option for nodes that never want to become servers.
38667 - Directory caching.
38668 - "AuthoritativeDir 1" option for the official dirservers.
38669 - Now other nodes (clients and servers) will cache the latest
38670 directory they've pulled down.
38671 - They can enable their DirPort to serve it to others.
38672 - Clients will pull down a directory from any node with an open
38673 DirPort, and check the signature/timestamp correctly.
38674 - Authoritative dirservers now fetch directories from other
38675 authdirservers, to stay better synced.
38676 - Running-routers list tells who's down also, along with noting
38677 if they're verified (listed by nickname) or unverified (listed
38679 - Allow dirservers to serve running-router list separately.
38680 This isn't used yet.
38681 - ORs connect-on-demand to other ORs
38682 - If you get an extend cell to an OR you're not connected to,
38683 connect, handshake, and forward the create cell.
38684 - The authoritative dirservers stay connected to everybody,
38685 and everybody stays connected to 0.0.7 servers, but otherwise
38686 clients/servers expire unused connections after 5 minutes.
38687 - When servers get a sigint, they delay 30 seconds (refusing new
38688 connections) then exit. A second sigint causes immediate exit.
38689 - File and name management:
38690 - Look for .torrc if no CONFDIR "torrc" is found.
38691 - If no datadir is defined, then choose, make, and secure ~/.tor
38693 - If torrc not found, exitpolicy reject *:*.
38694 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
38695 - If no nickname is defined, derive default from hostname.
38696 - Rename secret key files, e.g. identity.key -> secret_id_key,
38697 to discourage people from mailing their identity key to tor-ops.
38698 - Refuse to build a circuit before the directory has arrived --
38699 it won't work anyway, since you won't know the right onion keys
38701 - Try other dirservers immediately if the one you try is down. This
38702 should tolerate down dirservers better now.
38703 - Parse tor version numbers so we can do an is-newer-than check
38704 rather than an is-in-the-list check.
38705 - New socks command 'resolve', to let us shim gethostbyname()
38707 - A 'tor_resolve' script to access the socks resolve functionality.
38708 - A new socks-extensions.txt doc file to describe our
38709 interpretation and extensions to the socks protocols.
38710 - Add a ContactInfo option, which gets published in descriptor.
38711 - Publish OR uptime in descriptor (and thus in directory) too.
38712 - Write tor version at the top of each log file
38713 - New docs in the tarball:
38715 - Document that you should proxy your SSL traffic too.
38718 Changes in version 0.0.7.2 - 2004-07-07
38719 o A better fix for the 0.0.0.0 problem, that will hopefully
38720 eliminate the remaining related assertion failures.
38723 Changes in version 0.0.7.1 - 2004-07-04
38724 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
38725 since internally we use 0.0.0.0 to signify "not yet resolved".
38728 Changes in version 0.0.7 - 2004-06-07
38729 o Updated the man page to reflect the new features.
38732 Changes in version 0.0.7rc2 - 2004-06-06
38733 o Changes from 0.0.7rc1:
38734 - Make it build on Win32 again.
38735 o Changes from 0.0.6.2:
38736 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
38740 Changes in version 0.0.7rc1 - 2004-06-02
38742 - On sighup, we were adding another log without removing the first
38743 one. So log messages would get duplicated n times for n sighups.
38744 - Several cases of using a connection after we'd freed it. The
38745 problem was that connections that are pending resolve are in both
38746 the pending_resolve tree, and also the circuit's resolving_streams
38747 list. When you want to remove one, you must remove it from both.
38748 - Fix a double-mark-for-close where an end cell arrived for a
38749 resolving stream, and then the resolve failed.
38750 - Check directory signatures based on name of signer, not on whom
38751 we got the directory from. This will let us cache directories more
38754 - Crank up some of our constants to handle more users.
38757 Changes in version 0.0.7pre1 - 2004-06-02
38758 o Fixes for crashes and other obnoxious bugs:
38759 - Fix an epipe bug: sometimes when directory connections failed
38760 to connect, we would give them a chance to flush before closing
38762 - When we detached from a circuit because of resolvefailed, we
38763 would immediately try the same circuit twice more, and then
38764 give up on the resolve thinking we'd tried three different
38766 - Limit the number of intro circuits we'll attempt to build for a
38767 hidden service per 15-minute period.
38768 - Check recommended-software string *early*, before actually parsing
38769 the directory. Thus we can detect an obsolete version and exit,
38770 even if the new directory format doesn't parse.
38771 o Fixes for security bugs:
38772 - Remember which nodes are dirservers when you startup, and if a
38773 random OR enables his dirport, don't automatically assume he's
38774 a trusted dirserver.
38776 - Directory connections were asking the wrong poll socket to
38777 start writing, and not asking themselves to start writing.
38778 - When we detached from a circuit because we sent a begin but
38779 didn't get a connected, we would use it again the first time;
38780 but after that we would correctly switch to a different one.
38781 - Stop warning when the first onion decrypt attempt fails; they
38782 will sometimes legitimately fail now that we rotate keys.
38783 - Override unaligned-access-ok check when $host_cpu is ia64 or
38784 arm. Apparently they allow it but the kernel whines.
38785 - Dirservers try to reconnect periodically too, in case connections
38787 - Fix some memory leaks in directory servers.
38788 - Allow backslash in Win32 filenames.
38789 - Made Tor build complain-free on FreeBSD, hopefully without
38790 breaking other BSD builds. We'll see.
38792 - Doxygen markup on all functions and global variables.
38793 - Make directory functions update routerlist, not replace it. So
38794 now directory disagreements are not so critical a problem.
38795 - Remove the upper limit on number of descriptors in a dirserver's
38796 directory (not that we were anywhere close).
38797 - Allow multiple logfiles at different severity ranges.
38798 - Allow *BindAddress to specify ":port" rather than setting *Port
38799 separately. Allow multiple instances of each BindAddress config
38800 option, so you can bind to multiple interfaces if you want.
38801 - Allow multiple exit policy lines, which are processed in order.
38802 Now we don't need that huge line with all the commas in it.
38803 - Enable accept/reject policies on SOCKS connections, so you can bind
38804 to 0.0.0.0 but still control who can use your OP.
38807 Changes in version 0.0.6.2 - 2004-05-16
38808 o Our integrity-checking digest was checking only the most recent cell,
38809 not the previous cells like we'd thought.
38810 Thanks to Stefan Mark for finding the flaw!
38813 Changes in version 0.0.6.1 - 2004-05-06
38814 o Fix two bugs in our AES counter-mode implementation (this affected
38815 onion-level stream encryption, but not TLS-level). It turns
38816 out we were doing something much more akin to a 16-character
38817 polyalphabetic cipher. Oops.
38818 Thanks to Stefan Mark for finding the flaw!
38819 o Retire moria3 as a directory server, and add tor26 as a directory
38823 Changes in version 0.0.6 - 2004-05-02
38824 [version bump only]
38827 Changes in version 0.0.6rc4 - 2004-05-01
38828 o Update the built-in dirservers list to use the new directory format
38829 o Fix a rare seg fault: if a node offering a hidden service attempts
38830 to build a circuit to Alice's rendezvous point and fails before it
38831 reaches the last hop, it retries with a different circuit, but
38833 o Handle windows socket errors correctly.
38836 Changes in version 0.0.6rc3 - 2004-04-28
38837 o Don't expire non-general excess circuits (if we had enough
38838 circuits open, we were expiring rendezvous circuits -- even
38839 when they had a stream attached. oops.)
38840 o Fetch randomness from /dev/urandom better (not via fopen/fread)
38841 o Better debugging for tls errors
38842 o Some versions of openssl have an SSL_pending function that erroneously
38843 returns bytes when there is a non-application record pending.
38844 o Set Content-Type on the directory and hidserv descriptor.
38845 o Remove IVs from cipher code, since AES-ctr has none.
38846 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
38847 o We were using an array of length zero in a few places.
38848 o win32's gethostbyname can't resolve an IP to an IP.
38849 o win32's close can't close a socket.
38852 Changes in version 0.0.6rc2 - 2004-04-26
38853 o Fix a bug where we were closing tls connections intermittently.
38854 It turns out openssl keeps its errors around -- so if an error
38855 happens, and you don't ask about it, and then another openssl
38856 operation happens and succeeds, and you ask if there was an error,
38857 it tells you about the first error. Fun fun.
38858 o Fix a bug that's been lurking since 27 may 03 (!)
38859 When passing back a destroy cell, we would use the wrong circ id.
38860 'Mostly harmless', but still worth fixing.
38861 o Since we don't support truncateds much, don't bother sending them;
38862 just close the circ.
38863 o check for <machine/limits.h> so we build on NetBSD again (I hope).
38864 o don't crash if a conn that sent a begin has suddenly lost its circuit
38865 (this was quite rare).
38868 Changes in version 0.0.6rc1 - 2004-04-25
38869 o We now rotate link (tls context) keys and onion keys.
38870 o CREATE cells now include oaep padding, so you can tell
38871 if you decrypted them correctly.
38872 o Add bandwidthburst to server descriptor.
38873 o Directories now say which dirserver signed them.
38874 o Use a tor_assert macro that logs failed assertions too.
38877 Changes in version 0.0.6pre5 - 2004-04-18
38878 o changes from 0.0.6pre4:
38879 - make tor build on broken freebsd 5.2 installs
38880 - fix a failed assert when you try an intro point, get a nack, and try
38881 a second one and it works.
38882 - when alice uses a port that the hidden service doesn't accept,
38883 it now sends back an end cell (denied by exit policy). otherwise
38884 alice would just have to wait to time out.
38885 - fix another rare bug: when we had tried all the intro
38886 points for a hidden service, we fetched the descriptor
38887 again, but we left our introcirc thinking it had already
38888 sent an intro, so it kept waiting for a response...
38889 - bugfix: when you sleep your hidden-service laptop, as soon
38890 as it wakes up it tries to upload a service descriptor, but
38891 socketpair fails for some reason (localhost not up yet?).
38892 now we simply give up on that upload, and we'll try again later.
38893 i'd still like to find the bug though.
38894 - if an intro circ waiting for an ack dies before getting one, then
38896 - we were reusing stale service descriptors and refetching usable
38900 Changes in version 0.0.6pre4 - 2004-04-14
38901 o changes from 0.0.6pre3:
38902 - when bob fails to connect to the rendezvous point, and his
38903 circ didn't fail because of the rendezvous point itself, then
38904 he retries a couple of times
38905 - we expire introduction and rendezvous circs more thoroughly
38906 (sometimes they were hanging around forever)
38907 - we expire unattached rendezvous streams that have been around
38908 too long (they were sticking around forever).
38909 - fix a measly fencepost error that was crashing everybody with
38913 Changes in version 0.0.6pre3 - 2004-04-14
38914 o changes from 0.0.6pre2:
38915 - make hup work again
38916 - fix some memory leaks for dirservers
38917 - allow more skew in rendezvous descriptor timestamps, to help
38918 handle people like blanu who don't know what time it is
38919 - normal circs are 3 hops, but some rend/intro circs are 4, if
38920 the initiator doesn't get to choose the last hop
38921 - send acks for introductions, so alice can know whether to try
38923 - bob publishes intro points more correctly
38924 o changes from 0.0.5:
38925 - fix an assert trigger that's been plaguing us since the days
38926 of 0.0.2prexx (thanks weasel!)
38927 - retry stream correctly when we fail to connect because of
38928 exit-policy-reject (should try another) or can't-resolve-address
38929 (also should try another, because dns on random internet servers
38931 - when we hup a dirserver and we've *removed* a server from the
38932 approved-routers list, now we remove that server from the
38933 in-memory directories too
38936 Changes in version 0.0.6pre2 - 2004-04-08
38937 o We fixed our base32 implementation. Now it works on all architectures.
38940 Changes in version 0.0.6pre1 - 2004-04-08
38942 - Hidden services and rendezvous points are implemented. Go to
38943 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
38944 hidden services. (This only works via a socks4a proxy such as
38945 Privoxy, and currently it's quite slow.)
38948 Changes in version 0.0.5 - 2004-03-30
38949 [version bump only]
38952 Changes in version 0.0.5rc3 - 2004-03-29
38953 o Install torrc as torrc.sample -- we no longer clobber your
38955 o Re-enable recommendedversion checking (we broke it in rc2, oops)
38956 o Add in a 'notice' log level for things the operator should hear
38957 but that aren't warnings
38960 Changes in version 0.0.5rc2 - 2004-03-29
38961 o Hold socks connection open until reply is flushed (if possible)
38962 o Make exit nodes resolve IPs to IPs immediately, rather than asking
38963 the dns farm to do it.
38964 o Fix c99 aliasing warnings in rephist.c
38965 o Don't include server descriptors that are older than 24 hours in the
38967 o Give socks 'reject' replies their whole 15s to attempt to flush,
38968 rather than seeing the 60s timeout and assuming the flush had failed.
38969 o Clean automake droppings from the cvs repository
38972 Changes in version 0.0.5rc1 - 2004-03-28
38973 o Fix mangled-state bug in directory fetching (was causing sigpipes).
38974 o Only build circuits after we've fetched the directory: clients were
38975 using only the directory servers before they'd fetched a directory.
38976 This also means longer startup time; so it goes.
38977 o Fix an assert trigger where an OP would fail to handshake, and we'd
38978 expect it to have a nickname.
38979 o Work around a tsocks bug: do a socks reject when AP connection dies
38980 early, else tsocks goes into an infinite loop.
38983 Changes in version 0.0.4 - 2004-03-26
38984 o When connecting to a dirserver or OR and the network is down,
38988 Changes in version 0.0.3 - 2004-03-26
38989 o Warn and fail if server chose a nickname with illegal characters
38990 o Port to Solaris and Sparc:
38991 - include missing header fcntl.h
38992 - have autoconf find -lsocket -lnsl automatically
38993 - deal with hardware word alignment
38994 - make uname() work (solaris has a different return convention)
38995 - switch from using signal() to sigaction()
38996 o Preliminary work on reputation system:
38997 - Keep statistics on success/fail of connect attempts; they're published
38998 by kill -USR1 currently.
38999 - Add a RunTesting option to try to learn link state by creating test
39000 circuits, even when SocksPort is off.
39001 - Remove unused open circuits when there are too many.
39004 Changes in version 0.0.2 - 2004-03-19
39005 - Include strlcpy and strlcat for safer string ops
39006 - define INADDR_NONE so we compile (but still not run) on solaris
39009 Changes in version 0.0.2pre27 - 2004-03-14
39011 - Allow internal tor networks (we were rejecting internal IPs,
39012 now we allow them if they're set explicitly).
39013 - And fix a few endian issues.
39016 Changes in version 0.0.2pre26 - 2004-03-14
39018 - If a stream times out after 15s without a connected cell, don't
39019 try that circuit again: try a new one.
39020 - Retry streams at most 4 times. Then give up.
39021 - When a dirserver gets a descriptor from an unknown router, it
39022 logs its fingerprint (so the dirserver operator can choose to
39023 accept it even without mail from the server operator).
39024 - Inform unapproved servers when we reject their descriptors.
39025 - Make tor build on Windows again. It works as a client, who knows
39027 - Clearer instructions in the torrc for how to set up a server.
39028 - Be more efficient about reading fd's when our global token bucket
39029 (used for rate limiting) becomes empty.
39031 - Stop asserting that computers always go forward in time. It's
39033 - When we sent a cell (e.g. destroy) and then marked an OR connection
39034 expired, we might close it before finishing a flush if the other
39035 side isn't reading right then.
39036 - Don't allow dirservers to start if they haven't defined
39037 RecommendedVersions
39038 - We were caching transient dns failures. Oops.
39039 - Prevent servers from publishing an internal IP as their address.
39040 - Address a strcat vulnerability in circuit.c
39043 Changes in version 0.0.2pre25 - 2004-03-04
39045 - Put the OR's IP in its router descriptor, not its fqdn. That way
39046 we'll stop being stalled by gethostbyname for nodes with flaky dns,
39049 - If the user typed in an address that didn't resolve, the server
39053 Changes in version 0.0.2pre24 - 2004-03-03
39055 - Fix an assertion failure in dns.c, where we were trying to dequeue
39056 a pending dns resolve even if it wasn't pending
39057 - Fix a spurious socks5 warning about still trying to write after the
39058 connection is finished.
39059 - Hold certain marked_for_close connections open until they're finished
39060 flushing, rather than losing bytes by closing them too early.
39061 - Correctly report the reason for ending a stream
39062 - Remove some duplicate calls to connection_mark_for_close
39063 - Put switch_id and start_daemon earlier in the boot sequence, so it
39064 will actually try to chdir() to options.DataDirectory
39065 - Make 'make test' exit(1) if a test fails; fix some unit tests
39066 - Make tor fail when you use a config option it doesn't know about,
39067 rather than warn and continue.
39068 - Make --version work
39069 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
39072 Changes in version 0.0.2pre23 - 2004-02-29
39074 - Print a statement when the first circ is finished, so the user
39075 knows it's working.
39076 - If a relay cell is unrecognized at the end of the circuit,
39077 send back a destroy. (So attacks to mutate cells are more
39079 - New config option 'excludenodes' to avoid certain nodes for circuits.
39080 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
39081 so you can collect coredumps there.
39083 - Fix a bug in tls flushing where sometimes data got wedged and
39084 didn't flush until more data got sent. Hopefully this bug was
39085 a big factor in the random delays we were seeing.
39086 - Make 'connected' cells include the resolved IP, so the client
39087 dns cache actually gets populated.
39088 - Disallow changing from ORPort=0 to ORPort>0 on hup.
39089 - When we time-out on a stream and detach from the circuit, send an
39090 end cell down it first.
39091 - Only warn about an unknown router (in exitnodes, entrynodes,
39092 excludenodes) after we've fetched a directory.
39095 Changes in version 0.0.2pre22 - 2004-02-26
39097 - Servers publish less revealing uname information in descriptors.
39098 - More memory tracking and assertions, to crash more usefully when
39100 - If the default torrc isn't there, just use some default defaults.
39101 Plus provide an internal dirservers file if they don't have one.
39102 - When the user tries to use Tor as an http proxy, give them an http
39103 501 failure explaining that we're a socks proxy.
39104 - Dump a new router.desc on hup, to help confused people who change
39105 their exit policies and then wonder why router.desc doesn't reflect
39107 - Clean up the generic tor.sh init script that we ship with.
39109 - If the exit stream is pending on the resolve, and a destroy arrives,
39110 then the stream wasn't getting removed from the pending list. I
39111 think this was the one causing recent server crashes.
39112 - Use a more robust poll on OSX 10.3, since their poll is flaky.
39113 - When it couldn't resolve any dirservers, it was useless from then on.
39114 Now it reloads the RouterFile (or default dirservers) if it has no
39116 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
39117 many users don't even *have* a /usr/local/sbin/.
39120 Changes in version 0.0.2pre21 - 2004-02-18
39122 - There's a ChangeLog file that actually reflects the changelog.
39123 - There's a 'torify' wrapper script, with an accompanying
39124 tor-tsocks.conf, that simplifies the process of using tsocks for
39125 tor. It even has a man page.
39126 - The tor binary gets installed to sbin rather than bin now.
39127 - Retry streams where the connected cell hasn't arrived in 15 seconds
39128 - Clean up exit policy handling -- get the default out of the torrc,
39129 so we can update it without forcing each server operator to fix
39131 - Allow imaps and pop3s in default exit policy
39133 - Prevent picking middleman nodes as the last node in the circuit
39136 Changes in version 0.0.2pre20 - 2004-01-30
39138 - We now have a deb package, and it's in debian unstable. Go to
39139 it, apt-getters. :)
39140 - I've split the TotalBandwidth option into BandwidthRate (how many
39141 bytes per second you want to allow, long-term) and
39142 BandwidthBurst (how many bytes you will allow at once before the cap
39143 kicks in). This better token bucket approach lets you, say, set
39144 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
39145 performance while not exceeding your monthly bandwidth quota.
39146 - Push out a tls record's worth of data once you've got it, rather
39147 than waiting until you've read everything waiting to be read. This
39148 may improve performance by pipelining better. We'll see.
39149 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
39150 from failed circuits (if they haven't been connected yet) and attach
39152 - Expire old streams that haven't managed to connect. Some day we'll
39153 have them reattach to new circuits instead.
39156 - Fix several memory leaks that were causing servers to become bloated
39158 - Fix a few very rare assert triggers. A few more remain.
39159 - Setuid to User _before_ complaining about running as root.
39162 Changes in version 0.0.2pre19 - 2004-01-07
39164 - Fix deadlock condition in dns farm. We were telling a child to die by
39165 closing the parent's file descriptor to him. But newer children were
39166 inheriting the open file descriptor from the parent, and since they
39167 weren't closing it, the socket never closed, so the child never read
39168 eof, so he never knew to exit. Similarly, dns workers were holding
39169 open other sockets, leading to all sorts of chaos.
39170 - New cleaner daemon() code for forking and backgrounding.
39171 - If you log to a file, it now prints an entry at the top of the
39172 logfile so you know it's working.
39173 - The onionskin challenge length was 30 bytes longer than necessary.
39174 - Started to patch up the spec so it's not quite so out of date.
39177 Changes in version 0.0.2pre18 - 2004-01-02
39179 - Fix endian issues with the 'integrity' field in the relay header.
39180 - Fix a potential bug where connections in state
39181 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
39184 Changes in version 0.0.2pre17 - 2003-12-30
39186 - Made --debuglogfile (or any second log file, actually) work.
39187 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
39188 adversary could force us into an infinite loop.
39191 - Each onionskin handshake now includes a hash of the computed key,
39192 to prove the server's identity and help perfect forward secrecy.
39193 - Changed cell size from 256 to 512 bytes (working toward compatibility
39195 - Changed cell length to 2 bytes, and moved it to the relay header.
39196 - Implemented end-to-end integrity checking for the payloads of
39198 - Separated streamid from 'recognized' (otherwise circuits will get
39199 messed up when we try to have streams exit from the middle). We
39200 use the integrity-checking to confirm that a cell is addressed to
39202 - Randomize the initial circid and streamid values, so an adversary who
39203 breaks into a node can't learn how many circuits or streams have
39207 Changes in version 0.0.2pre16 - 2003-12-14
39209 - Fixed a bug that made HUP trigger an assert
39210 - Fixed a bug where a circuit that immediately failed wasn't being
39211 counted as a failed circuit in counting retries.
39214 - Now we close the circuit when we get a truncated cell: otherwise we're
39215 open to an anonymity attack where a bad node in the path truncates
39216 the circuit and then we open streams at him.
39217 - Add port ranges to exit policies
39218 - Add a conservative default exit policy
39219 - Warn if you're running tor as root
39220 - on HUP, retry OR connections and close/rebind listeners
39221 - options.EntryNodes: try these nodes first when picking the first node
39222 - options.ExitNodes: if your best choices happen to include any of
39223 your preferred exit nodes, you choose among just those preferred
39225 - options.ExcludedNodes: nodes that are never picked in path building
39228 Changes in version 0.0.2pre15 - 2003-12-03
39229 o Robustness and bugfixes:
39230 - Sometimes clients would cache incorrect DNS resolves, which would
39231 really screw things up.
39232 - An OP that goes offline would slowly leak all its sockets and stop
39234 - A wide variety of bugfixes in exit node selection, exit policy
39235 handling, and processing pending streams when a new circuit is
39237 - Pick nodes for a path only from those the directory says are up
39238 - Choose randomly from all running dirservers, not always the first one
39239 - Increase allowed http header size for directory fetch.
39240 - Stop writing to stderr (if we're daemonized it will be closed).
39241 - Enable -g always, so cores will be more useful to me.
39242 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
39245 - Wrote a man page. It lists commonly used options.
39248 - Change default loglevel to warn.
39249 - Make PidFile default to null rather than littering in your CWD.
39250 - OnionRouter config option is now obsolete. Instead it just checks
39252 - Moved to a single unified torrc file for both clients and servers.
39255 Changes in version 0.0.2pre14 - 2003-11-29
39256 o Robustness and bugfixes:
39257 - Force the admin to make the DataDirectory himself
39258 - to get ownership/permissions right
39259 - so clients no longer make a DataDirectory and then never use it
39260 - fix bug where a client who was offline for 45 minutes would never
39261 pull down a directory again
39262 - fix (or at least hide really well) the dns assert bug that was
39263 causing server crashes
39264 - warnings and improved robustness wrt clockskew for certs
39265 - use the native daemon(3) to daemonize, when available
39266 - exit if bind() fails
39267 - exit if neither socksport nor orport is defined
39268 - include our own tor_timegm (Win32 doesn't have its own)
39269 - bugfix for win32 with lots of connections
39270 - fix minor bias in PRNG
39271 - make dirserver more robust to corrupt cached directory
39274 - Wrote the design document (woo)
39276 o Circuit building and exit policies:
39277 - Circuits no longer try to use nodes that the directory has told them
39279 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
39280 bitcounts (18.0.0.0/8).
39281 - Make AP connections standby for a circuit if no suitable circuit
39282 exists, rather than failing
39283 - Circuits choose exit node based on addr/port, exit policies, and
39284 which AP connections are standing by
39285 - Bump min pathlen from 2 to 3
39286 - Relay end cells have a payload to describe why the stream ended.
39287 - If the stream failed because of exit policy, try again with a new
39289 - Clients have a dns cache to remember resolved addresses.
39290 - Notice more quickly when we have no working circuits
39293 - APPort is now called SocksPort
39294 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
39296 - RecommendedVersions is now a config variable rather than
39297 hardcoded (for dirservers)
39298 - Reloads config on HUP
39299 - Usage info on -h or --help
39300 - If you set User and Group config vars, it'll setu/gid to them.
39303 Changes in version 0.0.2pre13 - 2003-10-19
39304 o General stability:
39305 - SSL_write no longer fails when it returns WANTWRITE and the number
39306 of bytes in the buf has changed by the next SSL_write call.
39307 - Fix segfault fetching directory when network is down
39308 - Fix a variety of minor memory leaks
39309 - Dirservers reload the fingerprints file on HUP, so I don't have
39310 to take down the network when I approve a new router
39311 - Default server config file has explicit Address line to specify fqdn
39314 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
39315 - Make listener connections not ever alloc bufs
39317 o Autoconf improvements:
39318 - don't clobber an external CFLAGS in ./configure
39319 - Make install now works
39320 - create var/lib/tor on make install
39321 - autocreate a tor.sh initscript to help distribs
39322 - autocreate the torrc and sample-server-torrc with correct paths
39324 o Log files and Daemonizing now work:
39325 - If --DebugLogFile is specified, log to it at -l debug
39326 - If --LogFile is specified, use it instead of commandline
39327 - If --RunAsDaemon is set, tor forks and backgrounds on startup